src/app/tests/TestReadInteraction.cpp

/*
 *
 *    Copyright (c) 2021 Project CHIP Authors
 *    All rights reserved.
 *
 *    Licensed under the Apache License, Version 2.0 (the "License");
 *    you may not use this file except in compliance with the License.
 *    You may obtain a copy of the License at
 *
 *        http://www.apache.org/licenses/LICENSE-2.0
 *
 *    Unless required by applicable law or agreed to in writing, software
 *    distributed under the License is distributed on an "AS IS" BASIS,
 *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *    See the License for the specific language governing permissions and
 *    limitations under the License.
 */

/**
 *    @file
 *      This file implements unit tests for CHIP Interaction Model Read Interaction
 *
 */

#include "lib/support/CHIPMem.h"
#include <access/examples/PermissiveAccessControlDelegate.h>
#include <app/AttributeAccessInterface.h>
#include <app/InteractionModelEngine.h>
#include <app/InteractionModelHelper.h>
#include <app/MessageDef/AttributeReportIBs.h>
#include <app/MessageDef/EventDataIB.h>
#include <app/reporting/ReportSchedulerImpl.h>
#include <app/reporting/tests/MockReportScheduler.h>
#include <app/tests/AppTestContext.h>
#include <app/util/basic-types.h>
#include <app/util/mock/Constants.h>
#include <app/util/mock/Functions.h>
#include <lib/core/CHIPCore.h>
#include <lib/core/TLV.h>
#include <lib/core/TLVDebug.h>
#include <lib/core/TLVUtilities.h>
#include <lib/support/CHIPCounter.h>
#include <lib/support/ErrorStr.h>
#include <lib/support/UnitTestContext.h>
#include <lib/support/UnitTestRegistration.h>
#include <messaging/ExchangeContext.h>
#include <messaging/Flags.h>
#include <nlunit-test.h>
#include <protocols/interaction_model/Constants.h>
#include <type_traits>

namespace {
uint8_t gDebugEventBuffer[128];
uint8_t gInfoEventBuffer[128];
uint8_t gCritEventBuffer[128];
chip::app::CircularEventBuffer gCircularEventBuffer[3];
chip::ClusterId kTestClusterId          = 6;
chip::ClusterId kTestEventClusterId     = chip::Test::MockClusterId(1);
chip::ClusterId kInvalidTestClusterId   = 7;
chip::EndpointId kTestEndpointId        = 1;
chip::EndpointId kTestEventEndpointId   = chip::Test::kMockEndpoint1;
chip::EventId kTestEventIdDebug         = chip::Test::MockEventId(1);
chip::EventId kTestEventIdCritical      = chip::Test::MockEventId(2);
uint8_t kTestFieldValue1                = 1;
chip::TLV::Tag kTestEventTag            = chip::TLV::ContextTag(1);
chip::EndpointId kInvalidTestEndpointId = 3;
chip::DataVersion kTestDataVersion1     = 3;
chip::DataVersion kTestDataVersion2     = 5;

// Number of items in the list for MockAttributeId(4).
constexpr int kMockAttribute4ListLength = 6;

static chip::System::Clock::Internal::MockClock gMockClock;
static chip::System::Clock::ClockBase * gRealClock;

class TestContext : public chip::Test::AppContext
{
public:
    static int Initialize(void * context)
    {
        gRealClock = &chip::System::SystemClock();
        chip::System::Clock::Internal::SetSystemClockForTesting(&gMockClock);

        if (AppContext::Initialize(context) != SUCCESS)
            return FAILURE;

        auto * ctx = static_cast<TestContext *>(context);

        if (ctx->mEventCounter.Init(0) != CHIP_NO_ERROR)
        {
            return FAILURE;
        }

        chip::app::LogStorageResources logStorageResources[] = {
            { &gDebugEventBuffer[0], sizeof(gDebugEventBuffer), chip::app::PriorityLevel::Debug },
            { &gInfoEventBuffer[0], sizeof(gInfoEventBuffer), chip::app::PriorityLevel::Info },
            { &gCritEventBuffer[0], sizeof(gCritEventBuffer), chip::app::PriorityLevel::Critical },
        };

        chip::app::EventManagement::CreateEventManagement(&ctx->GetExchangeManager(), ArraySize(logStorageResources),
                                                          gCircularEventBuffer, logStorageResources, &ctx->mEventCounter);

        return SUCCESS;
    }

    static int Finalize(void * context)
    {
        chip::app::EventManagement::DestroyEventManagement();
        chip::System::Clock::Internal::SetSystemClockForTesting(gRealClock);

        if (AppContext::Finalize(context) != SUCCESS)
            return FAILURE;

        return SUCCESS;
    }

private:
    chip::MonotonicallyIncreasingCounter<chip::EventNumber> mEventCounter;
};

class TestEventGenerator : public chip::app::EventLoggingDelegate
{
public:
    CHIP_ERROR WriteEvent(chip::TLV::TLVWriter & aWriter)
    {
        chip::TLV::TLVType dataContainerType;
        ReturnErrorOnFailure(aWriter.StartContainer(chip::TLV::ContextTag(chip::to_underlying(chip::app::EventDataIB::Tag::kData)),
                                                    chip::TLV::kTLVType_Structure, dataContainerType));
        ReturnErrorOnFailure(aWriter.Put(kTestEventTag, mStatus));
        return aWriter.EndContainer(dataContainerType);
    }

    void SetStatus(int32_t aStatus) { mStatus = aStatus; }

private:
    int32_t mStatus;
};

void GenerateEvents(nlTestSuite * apSuite, void * apContext)
{
    CHIP_ERROR err = CHIP_NO_ERROR;
    chip::EventNumber eid1, eid2;
    chip::app::EventOptions options1;
    options1.mPath     = { kTestEventEndpointId, kTestEventClusterId, kTestEventIdDebug };
    options1.mPriority = chip::app::PriorityLevel::Info;

    chip::app::EventOptions options2;
    options2.mPath     = { kTestEventEndpointId, kTestEventClusterId, kTestEventIdCritical };
    options2.mPriority = chip::app::PriorityLevel::Critical;
    TestEventGenerator testEventGenerator;
    chip::app::EventManagement & logMgmt = chip::app::EventManagement::GetInstance();

    ChipLogDetail(DataManagement, "Generating Events");
    testEventGenerator.SetStatus(0);
    err = logMgmt.LogEvent(&testEventGenerator, options1, eid1);
    NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
    testEventGenerator.SetStatus(1);
    err = logMgmt.LogEvent(&testEventGenerator, options2, eid2);
    NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
}

class MockInteractionModelApp : public chip::app::ReadClient::Callback
{
public:
    void OnEventData(const chip::app::EventHeader & aEventHeader, chip::TLV::TLVReader * apData,
                     const chip::app::StatusIB * apStatus) override
    {
        ++mNumDataElementIndex;
        mGotEventResponse = true;
        if (apStatus != nullptr && !apStatus->IsSuccess())
        {
            mNumReadEventFailureStatusReceived++;
            mLastStatusReceived = *apStatus;
        }
        else
        {
            mLastStatusReceived = chip::app::StatusIB();
        }
    }

    void OnAttributeData(const chip::app::ConcreteDataAttributePath & aPath, chip::TLV::TLVReader * apData,
                         const chip::app::StatusIB & status) override
    {
        if (status.mStatus == chip::Protocols::InteractionModel::Status::Success)
        {
            mReceivedAttributePaths.push_back(aPath);
            mNumAttributeResponse++;
            mGotReport = true;

            if (aPath.IsListItemOperation())
            {
                mNumArrayItems++;
            }
            else if (aPath.IsListOperation())
            {
                // This is an entire list of things; count up how many.
                chip::TLV::TLVType containerType;
                if (apData->EnterContainer(containerType) == CHIP_NO_ERROR)
                {
                    size_t count = 0;
                    if (chip::TLV::Utilities::Count(*apData, count, /* aRecurse = */ false) == CHIP_NO_ERROR)
                    {
                        mNumArrayItems += static_cast<int>(count);
                    }
                }
            }
        }
        mLastStatusReceived = status;
    }

    void OnError(CHIP_ERROR aError) override
    {
        mError     = aError;
        mReadError = true;
    }

    void OnDone(chip::app::ReadClient *) override {}

    void OnDeallocatePaths(chip::app::ReadPrepareParams && aReadPrepareParams) override
    {
        if (aReadPrepareParams.mpAttributePathParamsList != nullptr)
        {
            delete[] aReadPrepareParams.mpAttributePathParamsList;
        }

        if (aReadPrepareParams.mpEventPathParamsList != nullptr)
        {
            delete[] aReadPrepareParams.mpEventPathParamsList;
        }

        if (aReadPrepareParams.mpDataVersionFilterList != nullptr)
        {
            delete[] aReadPrepareParams.mpDataVersionFilterList;
        }
    }

    int mNumDataElementIndex               = 0;
    bool mGotEventResponse                 = false;
    int mNumReadEventFailureStatusReceived = 0;
    int mNumAttributeResponse              = 0;
    int mNumArrayItems                     = 0;
    bool mGotReport                        = false;
    bool mReadError                        = false;
    chip::app::ReadHandler * mpReadHandler = nullptr;
    chip::app::StatusIB mLastStatusReceived;
    CHIP_ERROR mError = CHIP_NO_ERROR;
    std::vector<chip::app::ConcreteAttributePath> mReceivedAttributePaths;
};

//
// This dummy callback is used with a bunch of the tests below that don't go through
// the normal call-path of having the IM engine allocate the ReadHandler object. Instead,
// the object is allocated on stack for the purposes of a very narrow, tightly-coupled test.
//
// The typical callback implementor is the engine, but that would proceed to return the object
// back to the handler pool (which we obviously don't want in this case). This just no-ops those calls.
//
class NullReadHandlerCallback : public chip::app::ReadHandler::ManagementCallback
{
public:
    void OnDone(chip::app::ReadHandler & apReadHandlerObj) override {}
    chip::app::ReadHandler::ApplicationCallback * GetAppCallback() override { return nullptr; }
};

} // namespace

using ReportScheduler     = chip::app::reporting::ReportScheduler;
using ReportSchedulerImpl = chip::app::reporting::ReportSchedulerImpl;
using ReadHandlerNode     = chip::app::reporting::ReportScheduler::ReadHandlerNode;

namespace chip {
namespace app {

CHIP_ERROR ReadSingleClusterData(const Access::SubjectDescriptor & aSubjectDescriptor, bool aIsFabricFiltered,
                                 const ConcreteReadAttributePath & aPath, AttributeReportIBs::Builder & aAttributeReports,
                                 AttributeValueEncoder::AttributeEncodeState * apEncoderState)
{
    if (aPath.mClusterId >= Test::kMockEndpointMin)
    {
        return Test::ReadSingleMockClusterData(aSubjectDescriptor.fabricIndex, aPath, aAttributeReports, apEncoderState);
    }

    if (!(aPath.mClusterId == kTestClusterId && aPath.mEndpointId == kTestEndpointId))
    {
        AttributeReportIB::Builder & attributeReport = aAttributeReports.CreateAttributeReport();
        ReturnErrorOnFailure(aAttributeReports.GetError());
        ChipLogDetail(DataManagement, "TEST Cluster %" PRIx32 ", Field %" PRIx32 " is dirty", aPath.mClusterId, aPath.mAttributeId);

        AttributeStatusIB::Builder & attributeStatus = attributeReport.CreateAttributeStatus();
        ReturnErrorOnFailure(attributeReport.GetError());
        AttributePathIB::Builder & attributePath = attributeStatus.CreatePath();
        ReturnErrorOnFailure(attributeStatus.GetError());

        attributePath.Endpoint(aPath.mEndpointId).Cluster(aPath.mClusterId).Attribute(aPath.mAttributeId).EndOfAttributePathIB();
        ReturnErrorOnFailure(attributePath.GetError());
        StatusIB::Builder & errorStatus = attributeStatus.CreateErrorStatus();
        ReturnErrorOnFailure(attributeStatus.GetError());
        errorStatus.EncodeStatusIB(StatusIB(Protocols::InteractionModel::Status::UnsupportedAttribute));
        ReturnErrorOnFailure(errorStatus.GetError());
        ReturnErrorOnFailure(attributeStatus.EndOfAttributeStatusIB());
        return attributeReport.EndOfAttributeReportIB();
    }

    return AttributeValueEncoder(aAttributeReports, 0, aPath, 0).Encode(kTestFieldValue1);
}

bool IsClusterDataVersionEqual(const ConcreteClusterPath & aConcreteClusterPath, DataVersion aRequiredVersion)
{
    if (kTestDataVersion1 == aRequiredVersion)
    {
        return true;
    }

    return false;
}

bool IsDeviceTypeOnEndpoint(DeviceTypeId deviceType, EndpointId endpoint)
{
    return false;
}

class TestReadInteraction
{
public:
    static void TestReadClient(nlTestSuite * apSuite, void * apContext);
    static void TestReadUnexpectedSubscriptionId(nlTestSuite * apSuite, void * apContext);
    static void TestReadHandler(nlTestSuite * apSuite, void * apContext);
    static void TestReadClientGenerateAttributePathList(nlTestSuite * apSuite, void * apContext);
    static void TestReadClientGenerateInvalidAttributePathList(nlTestSuite * apSuite, void * apContext);
    static void TestReadClientGenerateOneEventPaths(nlTestSuite * apSuite, void * apContext);
    static void TestReadClientGenerateTwoEventPaths(nlTestSuite * apSuite, void * apContext);
    static void TestReadClientInvalidReport(nlTestSuite * apSuite, void * apContext);
    static void TestReadHandlerInvalidAttributePath(nlTestSuite * apSuite, void * apContext);
    static void TestProcessSubscribeRequest(nlTestSuite * apSuite, void * apContext);
#if CHIP_CONFIG_ENABLE_ICD_SERVER
    static void TestICDProcessSubscribeRequestSupMaxIntervalCeiling(nlTestSuite * apSuite, void * apContext);
    static void TestICDProcessSubscribeRequestInfMaxIntervalCeiling(nlTestSuite * apSuite, void * apContext);
    static void TestICDProcessSubscribeRequestSupMinInterval(nlTestSuite * apSuite, void * apContext);
    static void TestICDProcessSubscribeRequestMaxMinInterval(nlTestSuite * apSuite, void * apContext);
    static void TestICDProcessSubscribeRequestInvalidIdleModeInterval(nlTestSuite * apSuite, void * apContext);
#endif // CHIP_CONFIG_ENABLE_ICD_SERVER
    static void TestReadRoundtrip(nlTestSuite * apSuite, void * apContext);
    static void TestPostSubscribeRoundtripChunkReport(nlTestSuite * apSuite, void * apContext);
    static void TestReadRoundtripWithDataVersionFilter(nlTestSuite * apSuite, void * apContext);
    static void TestReadRoundtripWithNoMatchPathDataVersionFilter(nlTestSuite * apSuite, void * apContext);
    static void TestReadRoundtripWithMultiSamePathDifferentDataVersionFilter(nlTestSuite * apSuite, void * apContext);
    static void TestReadRoundtripWithSameDifferentPathsDataVersionFilter(nlTestSuite * apSuite, void * apContext);
    static void TestReadWildcard(nlTestSuite * apSuite, void * apContext);
    static void TestReadChunking(nlTestSuite * apSuite, void * apContext);
    static void TestSetDirtyBetweenChunks(nlTestSuite * apSuite, void * apContext);
    static void TestSubscribeRoundtrip(nlTestSuite * apSuite, void * apContext);
    static void TestSubscribeUrgentWildcardEvent(nlTestSuite * apSuite, void * apContext);
    static void TestSubscribeWildcard(nlTestSuite * apSuite, void * apContext);
    static void TestSubscribePartialOverlap(nlTestSuite * apSuite, void * apContext);
    static void TestSubscribeSetDirtyFullyOverlap(nlTestSuite * apSuite, void * apContext);
    static void TestSubscribeEarlyShutdown(nlTestSuite * apSuite, void * apContext);
    static void TestSubscribeInvalidAttributePathRoundtrip(nlTestSuite * apSuite, void * apContext);
    static void TestReadInvalidAttributePathRoundtrip(nlTestSuite * apSuite, void * apContext);
    static void TestSubscribeInvalidInterval(nlTestSuite * apSuite, void * apContext);
    static void TestReadShutdown(nlTestSuite * apSuite, void * apContext);
    static void TestResubscribeRoundtrip(nlTestSuite * apSuite, void * apContext);
    static void TestSubscribeRoundtripStatusReportTimeout(nlTestSuite * apSuite, void * apContext);
    static void TestPostSubscribeRoundtripStatusReportTimeout(nlTestSuite * apSuite, void * apContext);
    static void TestReadChunkingStatusReportTimeout(nlTestSuite * apSuite, void * apContext);
    static void TestReadReportFailure(nlTestSuite * apSuite, void * apContext);
    static void TestSubscribeRoundtripChunkStatusReportTimeout(nlTestSuite * apSuite, void * apContext);
    static void TestPostSubscribeRoundtripChunkStatusReportTimeout(nlTestSuite * apSuite, void * apContext);
    static void TestPostSubscribeRoundtripChunkReportTimeout(nlTestSuite * apSuite, void * apContext);
    static void TestReadClientReceiveInvalidMessage(nlTestSuite * apSuite, void * apContext);
    static void TestSubscribeClientReceiveInvalidStatusResponse(nlTestSuite * apSuite, void * apContext);
    static void TestSubscribeClientReceiveWellFormedStatusResponse(nlTestSuite * apSuite, void * apContext);
    static void TestSubscribeClientReceiveInvalidReportMessage(nlTestSuite * apSuite, void * apContext);
    static void TestSubscribeClientReceiveUnsolicitedInvalidReportMessage(nlTestSuite * apSuite, void * apContext);
    static void TestSubscribeClientReceiveInvalidSubscribeResponseMessage(nlTestSuite * apSuite, void * apContext);
    static void TestSubscribeClientReceiveUnsolicitedReportMessageWithInvalidSubscriptionId(nlTestSuite * apSuite,
                                                                                            void * apContext);
    static void TestReadChunkingInvalidSubscriptionId(nlTestSuite * apSuite, void * apContext);
    static void TestReadHandlerMalformedReadRequest1(nlTestSuite * apSuite, void * apContext);
    static void TestReadHandlerMalformedReadRequest2(nlTestSuite * apSuite, void * apContext);
    static void TestSubscribeSendUnknownMessage(nlTestSuite * apSuite, void * apContext);
    static void TestSubscribeSendInvalidStatusReport(nlTestSuite * apSuite, void * apContext);
    static void TestReadHandlerInvalidSubscribeRequest(nlTestSuite * apSuite, void * apContext);
    static void TestSubscribeInvalidateFabric(nlTestSuite * apSuite, void * apContext);
    static void TestShutdownSubscription(nlTestSuite * apSuite, void * apContext);
    static void TestSubscriptionReportWithDefunctSession(nlTestSuite * apSuite, void * apContext);
    static void TestReadHandlerMalformedSubscribeRequest(nlTestSuite * apSuite, void * apContext);

private:
    static void GenerateReportData(nlTestSuite * apSuite, void * apContext, System::PacketBufferHandle & aPayload,
                                   bool aNeedInvalidReport, bool aSuppressResponse, bool aHasSubscriptionId);
};

void TestReadInteraction::GenerateReportData(nlTestSuite * apSuite, void * apContext, System::PacketBufferHandle & aPayload,
                                             bool aNeedInvalidReport, bool aSuppressResponse, bool aHasSubscriptionId = false)
{
    CHIP_ERROR err = CHIP_NO_ERROR;
    System::PacketBufferTLVWriter writer;
    writer.Init(std::move(aPayload));

    ReportDataMessage::Builder reportDataMessageBuilder;

    err = reportDataMessageBuilder.Init(&writer);
    NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

    if (aHasSubscriptionId)
    {
        reportDataMessageBuilder.SubscriptionId(1);
        NL_TEST_ASSERT(apSuite, reportDataMessageBuilder.GetError() == CHIP_NO_ERROR);
    }

    AttributeReportIBs::Builder & attributeReportIBsBuilder = reportDataMessageBuilder.CreateAttributeReportIBs();
    NL_TEST_ASSERT(apSuite, reportDataMessageBuilder.GetError() == CHIP_NO_ERROR);

    AttributeReportIB::Builder & attributeReportIBBuilder = attributeReportIBsBuilder.CreateAttributeReport();
    NL_TEST_ASSERT(apSuite, attributeReportIBsBuilder.GetError() == CHIP_NO_ERROR);

    AttributeDataIB::Builder & attributeDataIBBuilder = attributeReportIBBuilder.CreateAttributeData();
    NL_TEST_ASSERT(apSuite, attributeReportIBBuilder.GetError() == CHIP_NO_ERROR);

    attributeDataIBBuilder.DataVersion(2);
    err = attributeDataIBBuilder.GetError();
    NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

    AttributePathIB::Builder & attributePathBuilder = attributeDataIBBuilder.CreatePath();
    NL_TEST_ASSERT(apSuite, attributeDataIBBuilder.GetError() == CHIP_NO_ERROR);

    if (aNeedInvalidReport)
    {
        attributePathBuilder.Node(1).Endpoint(2).Cluster(3).ListIndex(5).EndOfAttributePathIB();
    }
    else
    {
        attributePathBuilder.Node(1).Endpoint(2).Cluster(3).Attribute(4).EndOfAttributePathIB();
    }

    err = attributePathBuilder.GetError();
    NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

    // Construct attribute data
    {
        chip::TLV::TLVWriter * pWriter = attributeDataIBBuilder.GetWriter();
        chip::TLV::TLVType dummyType   = chip::TLV::kTLVType_NotSpecified;
        err = pWriter->StartContainer(chip::TLV::ContextTag(chip::to_underlying(chip::app::AttributeDataIB::Tag::kData)),
                                      chip::TLV::kTLVType_Structure, dummyType);
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

        err = pWriter->PutBoolean(chip::TLV::ContextTag(1), true);
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

        err = pWriter->EndContainer(dummyType);
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
    }

    attributeDataIBBuilder.EndOfAttributeDataIB();
    NL_TEST_ASSERT(apSuite, attributeDataIBBuilder.GetError() == CHIP_NO_ERROR);

    attributeReportIBBuilder.EndOfAttributeReportIB();
    NL_TEST_ASSERT(apSuite, attributeReportIBBuilder.GetError() == CHIP_NO_ERROR);

    attributeReportIBsBuilder.EndOfAttributeReportIBs();
    NL_TEST_ASSERT(apSuite, attributeReportIBsBuilder.GetError() == CHIP_NO_ERROR);

    reportDataMessageBuilder.MoreChunkedMessages(false);
    NL_TEST_ASSERT(apSuite, reportDataMessageBuilder.GetError() == CHIP_NO_ERROR);

    reportDataMessageBuilder.SuppressResponse(aSuppressResponse);
    NL_TEST_ASSERT(apSuite, reportDataMessageBuilder.GetError() == CHIP_NO_ERROR);

    reportDataMessageBuilder.EndOfReportDataMessage();
    NL_TEST_ASSERT(apSuite, reportDataMessageBuilder.GetError() == CHIP_NO_ERROR);

    err = writer.Finalize(&aPayload);
    NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
}

void TestReadInteraction::TestReadClient(nlTestSuite * apSuite, void * apContext)
{
    CHIP_ERROR err    = CHIP_NO_ERROR;
    TestContext & ctx = *static_cast<TestContext *>(apContext);
    MockInteractionModelApp delegate;
    app::ReadClient readClient(chip::app::InteractionModelEngine::GetInstance(), &ctx.GetExchangeManager(), delegate,
                               chip::app::ReadClient::InteractionType::Read);
    System::PacketBufferHandle buf = System::PacketBufferHandle::New(System::PacketBuffer::kMaxSize);

    ReadPrepareParams readPrepareParams(ctx.GetSessionBobToAlice());
    err = readClient.SendRequest(readPrepareParams);
    NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

    // We don't actually want to deliver that message, because we want to
    // synthesize the read response.  But we don't want it hanging around
    // forever either.
    ctx.GetLoopback().mNumMessagesToDrop = 1;
    ctx.DrainAndServiceIO();

    GenerateReportData(apSuite, apContext, buf, false /*aNeedInvalidReport*/, true /* aSuppressResponse*/);
    err = readClient.ProcessReportData(std::move(buf), ReadClient::ReportType::kContinuingTransaction);
    NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
}

void TestReadInteraction::TestReadUnexpectedSubscriptionId(nlTestSuite * apSuite, void * apContext)
{
    CHIP_ERROR err    = CHIP_NO_ERROR;
    TestContext & ctx = *static_cast<TestContext *>(apContext);
    MockInteractionModelApp delegate;
    app::ReadClient readClient(chip::app::InteractionModelEngine::GetInstance(), &ctx.GetExchangeManager(), delegate,
                               chip::app::ReadClient::InteractionType::Read);
    System::PacketBufferHandle buf = System::PacketBufferHandle::New(System::PacketBuffer::kMaxSize);

    ReadPrepareParams readPrepareParams(ctx.GetSessionBobToAlice());
    err = readClient.SendRequest(readPrepareParams);
    NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

    // We don't actually want to deliver that message, because we want to
    // synthesize the read response.  But we don't want it hanging around
    // forever either.
    ctx.GetLoopback().mNumMessagesToDrop = 1;
    ctx.DrainAndServiceIO();

    // For read, we don't expect there is subscription id in report data.
    GenerateReportData(apSuite, apContext, buf, false /*aNeedInvalidReport*/, true /* aSuppressResponse*/,
                       true /*aHasSubscriptionId*/);
    err = readClient.ProcessReportData(std::move(buf), ReadClient::ReportType::kContinuingTransaction);
    NL_TEST_ASSERT(apSuite, err == CHIP_ERROR_INVALID_ARGUMENT);
}

void TestReadInteraction::TestReadHandler(nlTestSuite * apSuite, void * apContext)
{
    CHIP_ERROR err    = CHIP_NO_ERROR;
    TestContext & ctx = *static_cast<TestContext *>(apContext);
    System::PacketBufferTLVWriter writer;
    System::PacketBufferHandle reportDatabuf  = System::PacketBufferHandle::New(System::PacketBuffer::kMaxSize);
    System::PacketBufferHandle readRequestbuf = System::PacketBufferHandle::New(System::PacketBuffer::kMaxSize);
    ReadRequestMessage::Builder readRequestBuilder;
    MockInteractionModelApp delegate;
    NullReadHandlerCallback nullCallback;

    auto * engine = chip::app::InteractionModelEngine::GetInstance();
    err           = engine->Init(&ctx.GetExchangeManager(), &ctx.GetFabricTable(), app::reporting::GetDefaultReportScheduler());
    NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

    {
        Messaging::ExchangeContext * exchangeCtx = ctx.NewExchangeToAlice(nullptr, false);
        ReadHandler readHandler(nullCallback, exchangeCtx, chip::app::ReadHandler::InteractionType::Read,
                                app::reporting::GetDefaultReportScheduler());

        GenerateReportData(apSuite, apContext, reportDatabuf, false /*aNeedInvalidReport*/, false /* aSuppressResponse*/);
        err = readHandler.SendReportData(std::move(reportDatabuf), false);
        NL_TEST_ASSERT(apSuite, err == CHIP_ERROR_INCORRECT_STATE);

        writer.Init(std::move(readRequestbuf));
        err = readRequestBuilder.Init(&writer);
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

        AttributePathIBs::Builder & attributePathListBuilder = readRequestBuilder.CreateAttributeRequests();
        NL_TEST_ASSERT(apSuite, attributePathListBuilder.GetError() == CHIP_NO_ERROR);

        AttributePathIB::Builder & attributePathBuilder = attributePathListBuilder.CreatePath();
        NL_TEST_ASSERT(apSuite, attributePathListBuilder.GetError() == CHIP_NO_ERROR);

        attributePathBuilder.Node(1).Endpoint(2).Cluster(3).Attribute(4).EndOfAttributePathIB();
        err = attributePathBuilder.GetError();
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

        attributePathListBuilder.EndOfAttributePathIBs();
        err = attributePathListBuilder.GetError();
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

        NL_TEST_ASSERT(apSuite, readRequestBuilder.GetError() == CHIP_NO_ERROR);
        readRequestBuilder.IsFabricFiltered(false).EndOfReadRequestMessage();
        NL_TEST_ASSERT(apSuite, readRequestBuilder.GetError() == CHIP_NO_ERROR);
        err = writer.Finalize(&readRequestbuf);
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

        // Call ProcessReadRequest directly, because OnInitialRequest sends status
        // messages on the wire instead of returning an error.
        err = readHandler.ProcessReadRequest(std::move(readRequestbuf));
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
    }

    engine->Shutdown();

    NL_TEST_ASSERT(apSuite, ctx.GetExchangeManager().GetNumActiveExchanges() == 0);
}

void TestReadInteraction::TestReadClientGenerateAttributePathList(nlTestSuite * apSuite, void * apContext)
{
    CHIP_ERROR err    = CHIP_NO_ERROR;
    TestContext & ctx = *static_cast<TestContext *>(apContext);
    MockInteractionModelApp delegate;
    System::PacketBufferHandle msgBuf;
    System::PacketBufferTLVWriter writer;
    ReadRequestMessage::Builder request;
    msgBuf = System::PacketBufferHandle::New(kMaxSecureSduLengthBytes);
    NL_TEST_ASSERT(apSuite, !msgBuf.IsNull());
    writer.Init(std::move(msgBuf));
    err = request.Init(&writer);
    NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

    app::ReadClient readClient(chip::app::InteractionModelEngine::GetInstance(), &ctx.GetExchangeManager(), delegate,
                               chip::app::ReadClient::InteractionType::Read);

    AttributePathParams attributePathParams[2];
    attributePathParams[0].mAttributeId = 0;
    attributePathParams[1].mAttributeId = 0;
    attributePathParams[1].mListIndex   = 0;

    Span<AttributePathParams> attributePaths(attributePathParams, 2 /*aAttributePathParamsListSize*/);

    AttributePathIBs::Builder & attributePathListBuilder = request.CreateAttributeRequests();
    err = readClient.GenerateAttributePaths(attributePathListBuilder, attributePaths);
    NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
}

void TestReadInteraction::TestReadClientGenerateInvalidAttributePathList(nlTestSuite * apSuite, void * apContext)
{
    CHIP_ERROR err    = CHIP_NO_ERROR;
    TestContext & ctx = *static_cast<TestContext *>(apContext);
    MockInteractionModelApp delegate;
    System::PacketBufferHandle msgBuf;
    System::PacketBufferTLVWriter writer;
    ReadRequestMessage::Builder request;
    msgBuf = System::PacketBufferHandle::New(kMaxSecureSduLengthBytes);
    NL_TEST_ASSERT(apSuite, !msgBuf.IsNull());
    writer.Init(std::move(msgBuf));

    app::ReadClient readClient(chip::app::InteractionModelEngine::GetInstance(), &ctx.GetExchangeManager(), delegate,
                               chip::app::ReadClient::InteractionType::Read);

    err = request.Init(&writer);
    NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

    AttributePathParams attributePathParams[2];
    attributePathParams[0].mAttributeId = 0;
    attributePathParams[1].mListIndex   = 0;

    Span<AttributePathParams> attributePaths(attributePathParams, 2 /*aAttributePathParamsListSize*/);

    AttributePathIBs::Builder & attributePathListBuilder = request.CreateAttributeRequests();
    err = readClient.GenerateAttributePaths(attributePathListBuilder, attributePaths);
    NL_TEST_ASSERT(apSuite, err == CHIP_ERROR_IM_MALFORMED_ATTRIBUTE_PATH_IB);
}

void TestReadInteraction::TestReadClientInvalidReport(nlTestSuite * apSuite, void * apContext)
{
    CHIP_ERROR err    = CHIP_NO_ERROR;
    TestContext & ctx = *static_cast<TestContext *>(apContext);
    MockInteractionModelApp delegate;

    System::PacketBufferHandle buf = System::PacketBufferHandle::New(System::PacketBuffer::kMaxSize);

    app::ReadClient readClient(chip::app::InteractionModelEngine::GetInstance(), &ctx.GetExchangeManager(), delegate,
                               chip::app::ReadClient::InteractionType::Read);

    ReadPrepareParams readPrepareParams(ctx.GetSessionBobToAlice());
    err = readClient.SendRequest(readPrepareParams);
    NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

    // We don't actually want to deliver that message, because we want to
    // synthesize the read response.  But we don't want it hanging around
    // forever either.
    ctx.GetLoopback().mNumMessagesToDrop = 1;
    ctx.DrainAndServiceIO();

    GenerateReportData(apSuite, apContext, buf, true /*aNeedInvalidReport*/, true /* aSuppressResponse*/);

    err = readClient.ProcessReportData(std::move(buf), ReadClient::ReportType::kContinuingTransaction);
    NL_TEST_ASSERT(apSuite, err == CHIP_ERROR_IM_MALFORMED_ATTRIBUTE_PATH_IB);
}

void TestReadInteraction::TestReadHandlerInvalidAttributePath(nlTestSuite * apSuite, void * apContext)
{
    CHIP_ERROR err    = CHIP_NO_ERROR;
    TestContext & ctx = *static_cast<TestContext *>(apContext);
    System::PacketBufferTLVWriter writer;
    System::PacketBufferHandle reportDatabuf  = System::PacketBufferHandle::New(System::PacketBuffer::kMaxSize);
    System::PacketBufferHandle readRequestbuf = System::PacketBufferHandle::New(System::PacketBuffer::kMaxSize);
    ReadRequestMessage::Builder readRequestBuilder;
    MockInteractionModelApp delegate;
    NullReadHandlerCallback nullCallback;

    auto * engine = chip::app::InteractionModelEngine::GetInstance();
    err           = engine->Init(&ctx.GetExchangeManager(), &ctx.GetFabricTable(), app::reporting::GetDefaultReportScheduler());
    NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

    {
        Messaging::ExchangeContext * exchangeCtx = ctx.NewExchangeToAlice(nullptr, false);
        ReadHandler readHandler(nullCallback, exchangeCtx, chip::app::ReadHandler::InteractionType::Read,
                                app::reporting::GetDefaultReportScheduler());

        GenerateReportData(apSuite, apContext, reportDatabuf, false /*aNeedInvalidReport*/, false /* aSuppressResponse*/);
        err = readHandler.SendReportData(std::move(reportDatabuf), false);
        NL_TEST_ASSERT(apSuite, err == CHIP_ERROR_INCORRECT_STATE);

        writer.Init(std::move(readRequestbuf));
        err = readRequestBuilder.Init(&writer);
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

        AttributePathIBs::Builder & attributePathListBuilder = readRequestBuilder.CreateAttributeRequests();
        NL_TEST_ASSERT(apSuite, attributePathListBuilder.GetError() == CHIP_NO_ERROR);

        AttributePathIB::Builder & attributePathBuilder = attributePathListBuilder.CreatePath();
        NL_TEST_ASSERT(apSuite, attributePathListBuilder.GetError() == CHIP_NO_ERROR);

        attributePathBuilder.Node(1).Endpoint(2).Cluster(3).EndOfAttributePathIB();
        err = attributePathBuilder.GetError();
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

        attributePathListBuilder.EndOfAttributePathIBs();
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
        readRequestBuilder.EndOfReadRequestMessage();
        NL_TEST_ASSERT(apSuite, readRequestBuilder.GetError() == CHIP_NO_ERROR);
        err = writer.Finalize(&readRequestbuf);
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

        err = readHandler.ProcessReadRequest(std::move(readRequestbuf));
        ChipLogError(DataManagement, "The error is %s", ErrorStr(err));
        NL_TEST_ASSERT(apSuite, err == CHIP_ERROR_END_OF_TLV);

        //
        // In the call above to ProcessReadRequest, the handler will not actually close out the EC since
        // it expects the ExchangeManager to do so automatically given it's not calling WillSend() on the EC,
        // and is not sending a response back.
        //
        // Consequently, we have to manually close out the EC here in this test since we're not actually calling
        // methods on these objects in a manner similar to how it would happen in normal use.
        //
        exchangeCtx->Close();
    }

    engine->Shutdown();
    NL_TEST_ASSERT(apSuite, ctx.GetExchangeManager().GetNumActiveExchanges() == 0);
}

void TestReadInteraction::TestReadClientGenerateOneEventPaths(nlTestSuite * apSuite, void * apContext)
{
    CHIP_ERROR err    = CHIP_NO_ERROR;
    TestContext & ctx = *static_cast<TestContext *>(apContext);
    MockInteractionModelApp delegate;
    System::PacketBufferHandle msgBuf;
    System::PacketBufferTLVWriter writer;
    ReadRequestMessage::Builder request;
    msgBuf = System::PacketBufferHandle::New(kMaxSecureSduLengthBytes);
    NL_TEST_ASSERT(apSuite, !msgBuf.IsNull());
    writer.Init(std::move(msgBuf));
    err = request.Init(&writer);
    NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

    app::ReadClient readClient(chip::app::InteractionModelEngine::GetInstance(), &ctx.GetExchangeManager(), delegate,
                               chip::app::ReadClient::InteractionType::Read);

    chip::app::EventPathParams eventPathParams[1];
    eventPathParams[0].mEndpointId = 2;
    eventPathParams[0].mClusterId  = 3;
    eventPathParams[0].mEventId    = 4;

    EventPathIBs::Builder & eventPathListBuilder = request.CreateEventRequests();
    Span<EventPathParams> eventPaths(eventPathParams, 1 /*aEventPathParamsListSize*/);
    err = readClient.GenerateEventPaths(eventPathListBuilder, eventPaths);
    NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

    request.IsFabricFiltered(false).EndOfReadRequestMessage();
    NL_TEST_ASSERT(apSuite, CHIP_NO_ERROR == request.GetError());

    err = writer.Finalize(&msgBuf);
    NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

    chip::System::PacketBufferTLVReader reader;
    ReadRequestMessage::Parser readRequestParser;

    reader.Init(msgBuf.Retain());
    err = readRequestParser.Init(reader);
    NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

#if CHIP_CONFIG_IM_PRETTY_PRINT
    readRequestParser.PrettyPrint();
#endif

    NL_TEST_ASSERT(apSuite, ctx.GetExchangeManager().GetNumActiveExchanges() == 0);
}

void TestReadInteraction::TestReadClientGenerateTwoEventPaths(nlTestSuite * apSuite, void * apContext)
{
    CHIP_ERROR err    = CHIP_NO_ERROR;
    TestContext & ctx = *static_cast<TestContext *>(apContext);
    MockInteractionModelApp delegate;
    System::PacketBufferHandle msgBuf;
    System::PacketBufferTLVWriter writer;
    ReadRequestMessage::Builder request;
    msgBuf = System::PacketBufferHandle::New(kMaxSecureSduLengthBytes);
    NL_TEST_ASSERT(apSuite, !msgBuf.IsNull());
    writer.Init(std::move(msgBuf));
    err = request.Init(&writer);
    NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

    app::ReadClient readClient(chip::app::InteractionModelEngine::GetInstance(), &ctx.GetExchangeManager(), delegate,
                               chip::app::ReadClient::InteractionType::Read);

    chip::app::EventPathParams eventPathParams[2];
    eventPathParams[0].mEndpointId = 2;
    eventPathParams[0].mClusterId  = 3;
    eventPathParams[0].mEventId    = 4;

    eventPathParams[1].mEndpointId = 2;
    eventPathParams[1].mClusterId  = 3;
    eventPathParams[1].mEventId    = 5;

    EventPathIBs::Builder & eventPathListBuilder = request.CreateEventRequests();
    Span<EventPathParams> eventPaths(eventPathParams, 2 /*aEventPathParamsListSize*/);
    err = readClient.GenerateEventPaths(eventPathListBuilder, eventPaths);
    NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

    request.IsFabricFiltered(false).EndOfReadRequestMessage();
    NL_TEST_ASSERT(apSuite, CHIP_NO_ERROR == request.GetError());

    err = writer.Finalize(&msgBuf);
    NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

    chip::System::PacketBufferTLVReader reader;
    ReadRequestMessage::Parser readRequestParser;

    reader.Init(msgBuf.Retain());
    err = readRequestParser.Init(reader);
    NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

#if CHIP_CONFIG_IM_PRETTY_PRINT
    readRequestParser.PrettyPrint();
#endif

    NL_TEST_ASSERT(apSuite, ctx.GetExchangeManager().GetNumActiveExchanges() == 0);
}

void TestReadInteraction::TestReadRoundtrip(nlTestSuite * apSuite, void * apContext)
{
    TestContext & ctx = *static_cast<TestContext *>(apContext);
    CHIP_ERROR err    = CHIP_NO_ERROR;

    Messaging::ReliableMessageMgr * rm = ctx.GetExchangeManager().GetReliableMessageMgr();
    // Shouldn't have anything in the retransmit table when starting the test.
    NL_TEST_ASSERT(apSuite, rm->TestGetCountRetransTable() == 0);

    GenerateEvents(apSuite, apContext);

    MockInteractionModelApp delegate;
    auto * engine = chip::app::InteractionModelEngine::GetInstance();
    err           = engine->Init(&ctx.GetExchangeManager(), &ctx.GetFabricTable(), app::reporting::GetDefaultReportScheduler());
    NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
    NL_TEST_ASSERT(apSuite, !delegate.mGotEventResponse);

    chip::app::EventPathParams eventPathParams[1];
    eventPathParams[0].mEndpointId = kTestEventEndpointId;
    eventPathParams[0].mClusterId  = kTestEventClusterId;

    chip::app::AttributePathParams attributePathParams[2];
    attributePathParams[0].mEndpointId  = kTestEndpointId;
    attributePathParams[0].mClusterId   = kTestClusterId;
    attributePathParams[0].mAttributeId = 1;

    attributePathParams[1].mEndpointId  = kTestEndpointId;
    attributePathParams[1].mClusterId   = kTestClusterId;
    attributePathParams[1].mAttributeId = 2;
    attributePathParams[1].mListIndex   = 1;

    ReadPrepareParams readPrepareParams(ctx.GetSessionBobToAlice());
    readPrepareParams.mpEventPathParamsList        = eventPathParams;
    readPrepareParams.mEventPathParamsListSize     = 1;
    readPrepareParams.mpAttributePathParamsList    = attributePathParams;
    readPrepareParams.mAttributePathParamsListSize = 2;
    readPrepareParams.mEventNumber.SetValue(1);

    {
        app::ReadClient readClient(chip::app::InteractionModelEngine::GetInstance(), &ctx.GetExchangeManager(), delegate,
                                   chip::app::ReadClient::InteractionType::Read);

        err = readClient.SendRequest(readPrepareParams);
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

        ctx.DrainAndServiceIO();

        NL_TEST_ASSERT(apSuite, delegate.mNumDataElementIndex == 1);
        NL_TEST_ASSERT(apSuite, delegate.mGotEventResponse);
        NL_TEST_ASSERT(apSuite, delegate.mNumAttributeResponse == 2);
        NL_TEST_ASSERT(apSuite, delegate.mGotReport);
        NL_TEST_ASSERT(apSuite, !delegate.mReadError);

        delegate.mGotEventResponse     = false;
        delegate.mNumAttributeResponse = 0;
        delegate.mGotReport            = false;
    }

    {
        app::ReadClient readClient(chip::app::InteractionModelEngine::GetInstance(), &ctx.GetExchangeManager(), delegate,
                                   chip::app::ReadClient::InteractionType::Read);

        err = readClient.SendRequest(readPrepareParams);
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

        ctx.DrainAndServiceIO();

        NL_TEST_ASSERT(apSuite, delegate.mGotEventResponse);
        NL_TEST_ASSERT(apSuite, delegate.mNumAttributeResponse == 2);
        NL_TEST_ASSERT(apSuite, delegate.mGotReport);
        NL_TEST_ASSERT(apSuite, !delegate.mReadError);

        // By now we should have closed all exchanges and sent all pending acks, so
        // there should be no queued-up things in the retransmit table.
        NL_TEST_ASSERT(apSuite, rm->TestGetCountRetransTable() == 0);
    }

    NL_TEST_ASSERT(apSuite, engine->GetNumActiveReadClients() == 0);
    engine->Shutdown();
    NL_TEST_ASSERT(apSuite, ctx.GetExchangeManager().GetNumActiveExchanges() == 0);
}

void TestReadInteraction::TestReadRoundtripWithDataVersionFilter(nlTestSuite * apSuite, void * apContext)
{
    TestContext & ctx = *static_cast<TestContext *>(apContext);
    CHIP_ERROR err    = CHIP_NO_ERROR;

    Messaging::ReliableMessageMgr * rm = ctx.GetExchangeManager().GetReliableMessageMgr();
    // Shouldn't have anything in the retransmit table when starting the test.
    NL_TEST_ASSERT(apSuite, rm->TestGetCountRetransTable() == 0);

    GenerateEvents(apSuite, apContext);

    MockInteractionModelApp delegate;
    auto * engine = chip::app::InteractionModelEngine::GetInstance();
    err           = engine->Init(&ctx.GetExchangeManager(), &ctx.GetFabricTable(), app::reporting::GetDefaultReportScheduler());
    NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
    NL_TEST_ASSERT(apSuite, !delegate.mGotEventResponse);

    chip::app::AttributePathParams attributePathParams[2];
    attributePathParams[0].mEndpointId  = kTestEndpointId;
    attributePathParams[0].mClusterId   = kTestClusterId;
    attributePathParams[0].mAttributeId = 1;

    attributePathParams[1].mEndpointId  = kTestEndpointId;
    attributePathParams[1].mClusterId   = kTestClusterId;
    attributePathParams[1].mAttributeId = 2;
    attributePathParams[1].mListIndex   = 1;

    chip::app::DataVersionFilter dataVersionFilters[1];
    dataVersionFilters[0].mEndpointId = kTestEndpointId;
    dataVersionFilters[0].mClusterId  = kTestClusterId;
    dataVersionFilters[0].mDataVersion.SetValue(kTestDataVersion1);

    ReadPrepareParams readPrepareParams(ctx.GetSessionBobToAlice());
    readPrepareParams.mpAttributePathParamsList    = attributePathParams;
    readPrepareParams.mAttributePathParamsListSize = 2;
    readPrepareParams.mpDataVersionFilterList      = dataVersionFilters;
    readPrepareParams.mDataVersionFilterListSize   = 1;

    {
        app::ReadClient readClient(chip::app::InteractionModelEngine::GetInstance(), &ctx.GetExchangeManager(), delegate,
                                   chip::app::ReadClient::InteractionType::Read);

        err = readClient.SendRequest(readPrepareParams);
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

        ctx.DrainAndServiceIO();
        NL_TEST_ASSERT(apSuite, delegate.mNumAttributeResponse == 0);

        delegate.mNumAttributeResponse = 0;
    }

    NL_TEST_ASSERT(apSuite, engine->GetNumActiveReadClients() == 0);
    engine->Shutdown();
    NL_TEST_ASSERT(apSuite, ctx.GetExchangeManager().GetNumActiveExchanges() == 0);
}

void TestReadInteraction::TestReadRoundtripWithNoMatchPathDataVersionFilter(nlTestSuite * apSuite, void * apContext)
{
    TestContext & ctx = *static_cast<TestContext *>(apContext);
    CHIP_ERROR err    = CHIP_NO_ERROR;

    Messaging::ReliableMessageMgr * rm = ctx.GetExchangeManager().GetReliableMessageMgr();
    // Shouldn't have anything in the retransmit table when starting the test.
    NL_TEST_ASSERT(apSuite, rm->TestGetCountRetransTable() == 0);

    GenerateEvents(apSuite, apContext);

    MockInteractionModelApp delegate;
    auto * engine = chip::app::InteractionModelEngine::GetInstance();
    err           = engine->Init(&ctx.GetExchangeManager(), &ctx.GetFabricTable(), app::reporting::GetDefaultReportScheduler());
    NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

    chip::app::AttributePathParams attributePathParams[2];
    attributePathParams[0].mEndpointId  = kTestEndpointId;
    attributePathParams[0].mClusterId   = kTestClusterId;
    attributePathParams[0].mAttributeId = 1;

    attributePathParams[1].mEndpointId  = kTestEndpointId;
    attributePathParams[1].mClusterId   = kTestClusterId;
    attributePathParams[1].mAttributeId = 2;
    attributePathParams[1].mListIndex   = 1;

    chip::app::DataVersionFilter dataVersionFilters[2];
    dataVersionFilters[0].mEndpointId = kTestEndpointId;
    dataVersionFilters[0].mClusterId  = kInvalidTestClusterId;
    dataVersionFilters[0].mDataVersion.SetValue(kTestDataVersion1);

    dataVersionFilters[1].mEndpointId = kInvalidTestEndpointId;
    dataVersionFilters[1].mClusterId  = kTestClusterId;
    dataVersionFilters[1].mDataVersion.SetValue(kTestDataVersion2);

    ReadPrepareParams readPrepareParams(ctx.GetSessionBobToAlice());
    readPrepareParams.mpAttributePathParamsList    = attributePathParams;
    readPrepareParams.mAttributePathParamsListSize = 2;
    readPrepareParams.mpDataVersionFilterList      = dataVersionFilters;
    readPrepareParams.mDataVersionFilterListSize   = 2;

    {
        app::ReadClient readClient(chip::app::InteractionModelEngine::GetInstance(), &ctx.GetExchangeManager(), delegate,
                                   chip::app::ReadClient::InteractionType::Read);

        err = readClient.SendRequest(readPrepareParams);
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

        ctx.DrainAndServiceIO();
        NL_TEST_ASSERT(apSuite, delegate.mNumAttributeResponse == 2);
        NL_TEST_ASSERT(apSuite, !delegate.mReadError);

        delegate.mNumAttributeResponse = 0;
    }

    NL_TEST_ASSERT(apSuite, engine->GetNumActiveReadClients() == 0);
    engine->Shutdown();
    NL_TEST_ASSERT(apSuite, ctx.GetExchangeManager().GetNumActiveExchanges() == 0);
}

void TestReadInteraction::TestReadRoundtripWithMultiSamePathDifferentDataVersionFilter(nlTestSuite * apSuite, void * apContext)
{
    TestContext & ctx = *static_cast<TestContext *>(apContext);
    CHIP_ERROR err    = CHIP_NO_ERROR;

    Messaging::ReliableMessageMgr * rm = ctx.GetExchangeManager().GetReliableMessageMgr();
    // Shouldn't have anything in the retransmit table when starting the test.
    NL_TEST_ASSERT(apSuite, rm->TestGetCountRetransTable() == 0);

    GenerateEvents(apSuite, apContext);

    MockInteractionModelApp delegate;
    auto * engine = chip::app::InteractionModelEngine::GetInstance();
    err           = engine->Init(&ctx.GetExchangeManager(), &ctx.GetFabricTable(), app::reporting::GetDefaultReportScheduler());
    NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
    NL_TEST_ASSERT(apSuite, !delegate.mGotEventResponse);

    chip::app::AttributePathParams attributePathParams[2];
    attributePathParams[0].mEndpointId  = kTestEndpointId;
    attributePathParams[0].mClusterId   = kTestClusterId;
    attributePathParams[0].mAttributeId = 1;

    attributePathParams[1].mEndpointId  = kTestEndpointId;
    attributePathParams[1].mClusterId   = kTestClusterId;
    attributePathParams[1].mAttributeId = 2;
    attributePathParams[1].mListIndex   = 1;

    chip::app::DataVersionFilter dataVersionFilters[2];
    dataVersionFilters[0].mEndpointId = kTestEndpointId;
    dataVersionFilters[0].mClusterId  = kTestClusterId;
    dataVersionFilters[0].mDataVersion.SetValue(kTestDataVersion1);

    dataVersionFilters[1].mEndpointId = kTestEndpointId;
    dataVersionFilters[1].mClusterId  = kTestClusterId;
    dataVersionFilters[1].mDataVersion.SetValue(kTestDataVersion2);

    ReadPrepareParams readPrepareParams(ctx.GetSessionBobToAlice());
    readPrepareParams.mpAttributePathParamsList    = attributePathParams;
    readPrepareParams.mAttributePathParamsListSize = 2;
    readPrepareParams.mpDataVersionFilterList      = dataVersionFilters;
    readPrepareParams.mDataVersionFilterListSize   = 2;

    {
        app::ReadClient readClient(chip::app::InteractionModelEngine::GetInstance(), &ctx.GetExchangeManager(), delegate,
                                   chip::app::ReadClient::InteractionType::Read);

        err = readClient.SendRequest(readPrepareParams);
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

        ctx.DrainAndServiceIO();
        NL_TEST_ASSERT(apSuite, delegate.mNumAttributeResponse == 2);
        NL_TEST_ASSERT(apSuite, !delegate.mReadError);

        delegate.mNumAttributeResponse = 0;
    }

    NL_TEST_ASSERT(apSuite, engine->GetNumActiveReadClients() == 0);
    engine->Shutdown();
    NL_TEST_ASSERT(apSuite, ctx.GetExchangeManager().GetNumActiveExchanges() == 0);
}

void TestReadInteraction::TestReadRoundtripWithSameDifferentPathsDataVersionFilter(nlTestSuite * apSuite, void * apContext)
{
    TestContext & ctx = *static_cast<TestContext *>(apContext);
    CHIP_ERROR err    = CHIP_NO_ERROR;

    Messaging::ReliableMessageMgr * rm = ctx.GetExchangeManager().GetReliableMessageMgr();
    // Shouldn't have anything in the retransmit table when starting the test.
    NL_TEST_ASSERT(apSuite, rm->TestGetCountRetransTable() == 0);

    GenerateEvents(apSuite, apContext);

    MockInteractionModelApp delegate;
    auto * engine = chip::app::InteractionModelEngine::GetInstance();
    err           = engine->Init(&ctx.GetExchangeManager(), &ctx.GetFabricTable(), app::reporting::GetDefaultReportScheduler());
    NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
    NL_TEST_ASSERT(apSuite, !delegate.mGotEventResponse);

    chip::app::AttributePathParams attributePathParams[2];
    attributePathParams[0].mEndpointId  = kTestEndpointId;
    attributePathParams[0].mClusterId   = kTestClusterId;
    attributePathParams[0].mAttributeId = 1;

    attributePathParams[1].mEndpointId  = kTestEndpointId;
    attributePathParams[1].mClusterId   = kTestClusterId;
    attributePathParams[1].mAttributeId = 2;
    attributePathParams[1].mListIndex   = 1;

    chip::app::DataVersionFilter dataVersionFilters[2];
    dataVersionFilters[0].mEndpointId = kTestEndpointId;
    dataVersionFilters[0].mClusterId  = kTestClusterId;
    dataVersionFilters[0].mDataVersion.SetValue(kTestDataVersion1);

    dataVersionFilters[1].mEndpointId = kInvalidTestEndpointId;
    dataVersionFilters[1].mClusterId  = kTestClusterId;
    dataVersionFilters[1].mDataVersion.SetValue(kTestDataVersion2);

    ReadPrepareParams readPrepareParams(ctx.GetSessionBobToAlice());
    readPrepareParams.mpAttributePathParamsList    = attributePathParams;
    readPrepareParams.mAttributePathParamsListSize = 2;
    readPrepareParams.mpDataVersionFilterList      = dataVersionFilters;
    readPrepareParams.mDataVersionFilterListSize   = 2;

    {
        app::ReadClient readClient(chip::app::InteractionModelEngine::GetInstance(), &ctx.GetExchangeManager(), delegate,
                                   chip::app::ReadClient::InteractionType::Read);

        err = readClient.SendRequest(readPrepareParams);
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

        ctx.DrainAndServiceIO();
        NL_TEST_ASSERT(apSuite, delegate.mNumAttributeResponse == 0);
        NL_TEST_ASSERT(apSuite, !delegate.mReadError);

        delegate.mNumAttributeResponse = 0;
    }

    NL_TEST_ASSERT(apSuite, engine->GetNumActiveReadClients() == 0);
    engine->Shutdown();
    NL_TEST_ASSERT(apSuite, ctx.GetExchangeManager().GetNumActiveExchanges() == 0);
}

void TestReadInteraction::TestReadWildcard(nlTestSuite * apSuite, void * apContext)
{
    TestContext & ctx = *static_cast<TestContext *>(apContext);
    CHIP_ERROR err    = CHIP_NO_ERROR;

    Messaging::ReliableMessageMgr * rm = ctx.GetExchangeManager().GetReliableMessageMgr();
    // Shouldn't have anything in the retransmit table when starting the test.
    NL_TEST_ASSERT(apSuite, rm->TestGetCountRetransTable() == 0);

    GenerateEvents(apSuite, apContext);

    MockInteractionModelApp delegate;
    auto * engine = chip::app::InteractionModelEngine::GetInstance();
    err           = engine->Init(&ctx.GetExchangeManager(), &ctx.GetFabricTable(), app::reporting::GetDefaultReportScheduler());
    NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
    NL_TEST_ASSERT(apSuite, !delegate.mGotEventResponse);

    chip::app::AttributePathParams attributePathParams[1];
    attributePathParams[0].mEndpointId = Test::kMockEndpoint2;
    attributePathParams[0].mClusterId  = Test::MockClusterId(3);

    ReadPrepareParams readPrepareParams(ctx.GetSessionBobToAlice());
    readPrepareParams.mpEventPathParamsList        = nullptr;
    readPrepareParams.mEventPathParamsListSize     = 0;
    readPrepareParams.mpAttributePathParamsList    = attributePathParams;
    readPrepareParams.mAttributePathParamsListSize = 1;

    {

        app::ReadClient readClient(chip::app::InteractionModelEngine::GetInstance(), &ctx.GetExchangeManager(), delegate,
                                   chip::app::ReadClient::InteractionType::Read);

        err = readClient.SendRequest(readPrepareParams);
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

        ctx.DrainAndServiceIO();
        NL_TEST_ASSERT(apSuite, delegate.mNumAttributeResponse == 5);
        NL_TEST_ASSERT(apSuite, delegate.mGotReport);
        NL_TEST_ASSERT(apSuite, !delegate.mReadError);
        // By now we should have closed all exchanges and sent all pending acks, so
        // there should be no queued-up things in the retransmit table.
        NL_TEST_ASSERT(apSuite, rm->TestGetCountRetransTable() == 0);
    }

    NL_TEST_ASSERT(apSuite, engine->GetNumActiveReadClients() == 0);
    engine->Shutdown();
    NL_TEST_ASSERT(apSuite, ctx.GetExchangeManager().GetNumActiveExchanges() == 0);
}

// TestReadChunking will try to read a few large attributes, the report won't fit into the MTU and result in chunking.
void TestReadInteraction::TestReadChunking(nlTestSuite * apSuite, void * apContext)
{
    TestContext & ctx = *static_cast<TestContext *>(apContext);
    CHIP_ERROR err    = CHIP_NO_ERROR;

    Messaging::ReliableMessageMgr * rm = ctx.GetExchangeManager().GetReliableMessageMgr();
    // Shouldn't have anything in the retransmit table when starting the test.
    NL_TEST_ASSERT(apSuite, rm->TestGetCountRetransTable() == 0);

    GenerateEvents(apSuite, apContext);

    MockInteractionModelApp delegate;
    auto * engine = chip::app::InteractionModelEngine::GetInstance();
    err           = engine->Init(&ctx.GetExchangeManager(), &ctx.GetFabricTable(), app::reporting::GetDefaultReportScheduler());
    NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
    NL_TEST_ASSERT(apSuite, !delegate.mGotEventResponse);

    chip::app::AttributePathParams attributePathParams[1];
    // Mock Attribute 4 is a big attribute, with kMockAttribute4ListLength large
    // OCTET_STRING elements.
    attributePathParams[0].mEndpointId  = Test::kMockEndpoint3;
    attributePathParams[0].mClusterId   = Test::MockClusterId(2);
    attributePathParams[0].mAttributeId = Test::MockAttributeId(4);

    ReadPrepareParams readPrepareParams(ctx.GetSessionBobToAlice());
    readPrepareParams.mpEventPathParamsList        = nullptr;
    readPrepareParams.mEventPathParamsListSize     = 0;
    readPrepareParams.mpAttributePathParamsList    = attributePathParams;
    readPrepareParams.mAttributePathParamsListSize = 1;

    {
        app::ReadClient readClient(chip::app::InteractionModelEngine::GetInstance(), &ctx.GetExchangeManager(), delegate,
                                   chip::app::ReadClient::InteractionType::Read);

        err = readClient.SendRequest(readPrepareParams);
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

        ctx.DrainAndServiceIO();

        // We get one chunk with 4 array elements, and then one chunk per
        // element, and the total size of the array is
        // kMockAttribute4ListLength.
        NL_TEST_ASSERT(apSuite, delegate.mNumAttributeResponse == 1 + (kMockAttribute4ListLength - 4));
        NL_TEST_ASSERT(apSuite, delegate.mNumArrayItems == 6);
        NL_TEST_ASSERT(apSuite, delegate.mGotReport);
        NL_TEST_ASSERT(apSuite, !delegate.mReadError);
        // By now we should have closed all exchanges and sent all pending acks, so
        // there should be no queued-up things in the retransmit table.
        NL_TEST_ASSERT(apSuite, rm->TestGetCountRetransTable() == 0);
    }

    NL_TEST_ASSERT(apSuite, engine->GetNumActiveReadClients() == 0);
    engine->Shutdown();
    NL_TEST_ASSERT(apSuite, ctx.GetExchangeManager().GetNumActiveExchanges() == 0);
}

void TestReadInteraction::TestSetDirtyBetweenChunks(nlTestSuite * apSuite, void * apContext)
{
    TestContext & ctx = *static_cast<TestContext *>(apContext);
    CHIP_ERROR err    = CHIP_NO_ERROR;

    Messaging::ReliableMessageMgr * rm = ctx.GetExchangeManager().GetReliableMessageMgr();
    // Shouldn't have anything in the retransmit table when starting the test.
    NL_TEST_ASSERT(apSuite, rm->TestGetCountRetransTable() == 0);

    GenerateEvents(apSuite, apContext);

    auto * engine = chip::app::InteractionModelEngine::GetInstance();
    err           = engine->Init(&ctx.GetExchangeManager(), &ctx.GetFabricTable(), app::reporting::GetDefaultReportScheduler());
    NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

    chip::app::AttributePathParams attributePathParams[2];
    for (auto & attributePathParam : attributePathParams)
    {
        attributePathParam.mEndpointId  = Test::kMockEndpoint3;
        attributePathParam.mClusterId   = Test::MockClusterId(2);
        attributePathParam.mAttributeId = Test::MockAttributeId(4);
    }

    ReadPrepareParams readPrepareParams(ctx.GetSessionBobToAlice());
    readPrepareParams.mpEventPathParamsList        = nullptr;
    readPrepareParams.mEventPathParamsListSize     = 0;
    readPrepareParams.mpAttributePathParamsList    = attributePathParams;
    readPrepareParams.mAttributePathParamsListSize = 2;

    {
        int currentAttributeResponsesWhenSetDirty = 0;
        int currentArrayItemsWhenSetDirty         = 0;

        class DirtyingMockDelegate : public MockInteractionModelApp
        {
        public:
            DirtyingMockDelegate(AttributePathParams (&aReadPaths)[2], int & aNumAttributeResponsesWhenSetDirty,
                                 int & aNumArrayItemsWhenSetDirty) :
                mReadPaths(aReadPaths),
                mNumAttributeResponsesWhenSetDirty(aNumAttributeResponsesWhenSetDirty),
                mNumArrayItemsWhenSetDirty(aNumArrayItemsWhenSetDirty)
            {}

        private:
            void OnAttributeData(const ConcreteDataAttributePath & aPath, TLV::TLVReader * apData, const StatusIB & status) override
            {
                MockInteractionModelApp::OnAttributeData(aPath, apData, status);
                if (!mGotStartOfFirstReport && aPath.mEndpointId == mReadPaths[0].mEndpointId &&
                    aPath.mClusterId == mReadPaths[0].mClusterId && aPath.mAttributeId == mReadPaths[0].mAttributeId &&
                    !aPath.IsListItemOperation())
                {
                    mGotStartOfFirstReport = true;
                    return;
                }

                if (!mGotStartOfSecondReport && aPath.mEndpointId == mReadPaths[1].mEndpointId &&
                    aPath.mClusterId == mReadPaths[1].mClusterId && aPath.mAttributeId == mReadPaths[1].mAttributeId &&
                    !aPath.IsListItemOperation())
                {
                    mGotStartOfSecondReport = true;
                    // We always have data chunks, so go ahead to mark things
                    // dirty as needed.
                }

                if (!mGotStartOfSecondReport)
                {
                    // Don't do any setting dirty yet; we are waiting for a data
                    // chunk from the second path.
                    return;
                }

                if (mDidSetDirty)
                {
                    if (!aPath.IsListItemOperation())
                    {
                        mGotPostSetDirtyReport = true;
                        return;
                    }

                    if (!mGotPostSetDirtyReport)
                    {
                        // We're finishing out the message where we decided to
                        // SetDirty.
                        ++mNumAttributeResponsesWhenSetDirty;
                        ++mNumArrayItemsWhenSetDirty;
                    }
                }

                if (!mDidSetDirty)
                {
                    mDidSetDirty = true;

                    AttributePathParams dirtyPath;
                    dirtyPath.mEndpointId  = Test::kMockEndpoint3;
                    dirtyPath.mClusterId   = Test::MockClusterId(2);
                    dirtyPath.mAttributeId = Test::MockAttributeId(4);

                    if (aPath.mEndpointId == dirtyPath.mEndpointId && aPath.mClusterId == dirtyPath.mClusterId &&
                        aPath.mAttributeId == dirtyPath.mAttributeId)
                    {
                        // At this time, we are in the middle of report for second item.
                        mNumAttributeResponsesWhenSetDirty = mNumAttributeResponse;
                        mNumArrayItemsWhenSetDirty         = mNumArrayItems;
                        InteractionModelEngine::GetInstance()->GetReportingEngine().SetDirty(dirtyPath);
                    }
                }
            }

            // Whether we got the start of the report for our first path.
            bool mGotStartOfFirstReport = false;
            // Whether we got the start of the report for our second path.
            bool mGotStartOfSecondReport = false;
            // Whether we got a new non-list-item report after we set dirty.
            bool mGotPostSetDirtyReport = false;
            bool mDidSetDirty           = false;
            AttributePathParams (&mReadPaths)[2];
            int & mNumAttributeResponsesWhenSetDirty;
            int & mNumArrayItemsWhenSetDirty;
        };

        DirtyingMockDelegate delegate(attributePathParams, currentAttributeResponsesWhenSetDirty, currentArrayItemsWhenSetDirty);
        NL_TEST_ASSERT(apSuite, !delegate.mGotEventResponse);

        app::ReadClient readClient(chip::app::InteractionModelEngine::GetInstance(), &ctx.GetExchangeManager(), delegate,
                                   chip::app::ReadClient::InteractionType::Read);

        err = readClient.SendRequest(readPrepareParams);
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

        ctx.DrainAndServiceIO();

        // Our list has length kMockAttribute4ListLength.  Since the underlying
        // path iterator should be reset to the beginning of the cluster it is
        // currently iterating, we expect to get another value for our
        // attribute.  The way the packet boundaries happen to fall, that value
        // will encode 4 items in the first IB and then one IB per item.
        const int expectedIBs = 1 + (kMockAttribute4ListLength - 4);
        ChipLogError(DataManagement, "OLD: %d\n", currentAttributeResponsesWhenSetDirty);
        ChipLogError(DataManagement, "NEW: %d\n", delegate.mNumAttributeResponse);
        NL_TEST_ASSERT(apSuite, delegate.mNumAttributeResponse == currentAttributeResponsesWhenSetDirty + expectedIBs);
        NL_TEST_ASSERT(apSuite, delegate.mNumArrayItems == currentArrayItemsWhenSetDirty + kMockAttribute4ListLength);
        NL_TEST_ASSERT(apSuite, delegate.mGotReport);
        NL_TEST_ASSERT(apSuite, !delegate.mReadError);
        // By now we should have closed all exchanges and sent all pending acks, so
        // there should be no queued-up things in the retransmit table.
        NL_TEST_ASSERT(apSuite, rm->TestGetCountRetransTable() == 0);
    }

    NL_TEST_ASSERT(apSuite, engine->GetNumActiveReadClients() == 0);
    engine->Shutdown();
    NL_TEST_ASSERT(apSuite, ctx.GetExchangeManager().GetNumActiveExchanges() == 0);
}

void TestReadInteraction::TestReadInvalidAttributePathRoundtrip(nlTestSuite * apSuite, void * apContext)
{
    TestContext & ctx = *static_cast<TestContext *>(apContext);
    CHIP_ERROR err    = CHIP_NO_ERROR;

    Messaging::ReliableMessageMgr * rm = ctx.GetExchangeManager().GetReliableMessageMgr();
    // Shouldn't have anything in the retransmit table when starting the test.
    NL_TEST_ASSERT(apSuite, rm->TestGetCountRetransTable() == 0);

    GenerateEvents(apSuite, apContext);

    MockInteractionModelApp delegate;
    auto * engine = chip::app::InteractionModelEngine::GetInstance();
    err           = engine->Init(&ctx.GetExchangeManager(), &ctx.GetFabricTable(), app::reporting::GetDefaultReportScheduler());
    NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
    NL_TEST_ASSERT(apSuite, !delegate.mGotEventResponse);

    chip::app::AttributePathParams attributePathParams[2];
    attributePathParams[0].mEndpointId  = kTestEndpointId;
    attributePathParams[0].mClusterId   = kInvalidTestClusterId;
    attributePathParams[0].mAttributeId = 1;

    ReadPrepareParams readPrepareParams(ctx.GetSessionBobToAlice());
    readPrepareParams.mpAttributePathParamsList    = attributePathParams;
    readPrepareParams.mAttributePathParamsListSize = 1;

    {
        app::ReadClient readClient(chip::app::InteractionModelEngine::GetInstance(), &ctx.GetExchangeManager(), delegate,
                                   chip::app::ReadClient::InteractionType::Read);

        err = readClient.SendRequest(readPrepareParams);
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

        ctx.DrainAndServiceIO();

        NL_TEST_ASSERT(apSuite, delegate.mNumAttributeResponse == 0);
        // By now we should have closed all exchanges and sent all pending acks, so
        // there should be no queued-up things in the retransmit table.
        NL_TEST_ASSERT(apSuite, rm->TestGetCountRetransTable() == 0);
    }

    engine->Shutdown();
    NL_TEST_ASSERT(apSuite, ctx.GetExchangeManager().GetNumActiveExchanges() == 0);
}

void TestReadInteraction::TestProcessSubscribeRequest(nlTestSuite * apSuite, void * apContext)
{
    CHIP_ERROR err    = CHIP_NO_ERROR;
    TestContext & ctx = *static_cast<TestContext *>(apContext);
    System::PacketBufferTLVWriter writer;
    System::PacketBufferHandle subscribeRequestbuf = System::PacketBufferHandle::New(System::PacketBuffer::kMaxSize);
    SubscribeRequestMessage::Builder subscribeRequestBuilder;
    MockInteractionModelApp delegate;
    auto * engine = chip::app::InteractionModelEngine::GetInstance();
    err           = engine->Init(&ctx.GetExchangeManager(), &ctx.GetFabricTable(), app::reporting::GetDefaultReportScheduler());
    NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

    Messaging::ExchangeContext * exchangeCtx = ctx.NewExchangeToAlice(nullptr, false);

    {
        ReadHandler readHandler(*engine, exchangeCtx, chip::app::ReadHandler::InteractionType::Read,
                                app::reporting::GetDefaultReportScheduler());

        writer.Init(std::move(subscribeRequestbuf));
        err = subscribeRequestBuilder.Init(&writer);
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

        subscribeRequestBuilder.KeepSubscriptions(true);
        NL_TEST_ASSERT(apSuite, subscribeRequestBuilder.GetError() == CHIP_NO_ERROR);

        subscribeRequestBuilder.MinIntervalFloorSeconds(2);
        NL_TEST_ASSERT(apSuite, subscribeRequestBuilder.GetError() == CHIP_NO_ERROR);

        subscribeRequestBuilder.MaxIntervalCeilingSeconds(3);
        NL_TEST_ASSERT(apSuite, subscribeRequestBuilder.GetError() == CHIP_NO_ERROR);

        AttributePathIBs::Builder & attributePathListBuilder = subscribeRequestBuilder.CreateAttributeRequests();
        NL_TEST_ASSERT(apSuite, attributePathListBuilder.GetError() == CHIP_NO_ERROR);

        AttributePathIB::Builder & attributePathBuilder = attributePathListBuilder.CreatePath();
        NL_TEST_ASSERT(apSuite, attributePathListBuilder.GetError() == CHIP_NO_ERROR);

        attributePathBuilder.Node(1).Endpoint(2).Cluster(3).Attribute(4).ListIndex(5).EndOfAttributePathIB();
        err = attributePathBuilder.GetError();
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

        attributePathListBuilder.EndOfAttributePathIBs();
        err = attributePathListBuilder.GetError();
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

        subscribeRequestBuilder.IsFabricFiltered(false).EndOfSubscribeRequestMessage();
        NL_TEST_ASSERT(apSuite, subscribeRequestBuilder.GetError() == CHIP_NO_ERROR);

        NL_TEST_ASSERT(apSuite, subscribeRequestBuilder.GetError() == CHIP_NO_ERROR);
        err = writer.Finalize(&subscribeRequestbuf);
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

        err = readHandler.ProcessSubscribeRequest(std::move(subscribeRequestbuf));
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
    }

    engine->Shutdown();

    NL_TEST_ASSERT(apSuite, ctx.GetExchangeManager().GetNumActiveExchanges() == 0);
}

#if CHIP_CONFIG_ENABLE_ICD_SERVER
/**
 * @brief Test validates that an ICD will choose its IdleModeInterval (GetPublisherSelectedIntervalLimit)
 *        as MaxInterval when the MaxIntervalCeiling is superior.
 */
void TestReadInteraction::TestICDProcessSubscribeRequestSupMaxIntervalCeiling(nlTestSuite * apSuite, void * apContext)
{
    CHIP_ERROR err    = CHIP_NO_ERROR;
    TestContext & ctx = *static_cast<TestContext *>(apContext);
    System::PacketBufferTLVWriter writer;
    System::PacketBufferHandle subscribeRequestbuf = System::PacketBufferHandle::New(System::PacketBuffer::kMaxSize);
    SubscribeRequestMessage::Builder subscribeRequestBuilder;
    MockInteractionModelApp delegate;
    auto * engine = chip::app::InteractionModelEngine::GetInstance();
    err           = engine->Init(&ctx.GetExchangeManager(), &ctx.GetFabricTable(), app::reporting::GetDefaultReportScheduler());
    NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

    uint16_t kMinInterval        = 0;
    uint16_t kMaxIntervalCeiling = 1;

    Messaging::ExchangeContext * exchangeCtx = ctx.NewExchangeToAlice(nullptr, false);

    {
        ReadHandler readHandler(*engine, exchangeCtx, chip::app::ReadHandler::InteractionType::Read,
                                app::reporting::GetDefaultReportScheduler());

        writer.Init(std::move(subscribeRequestbuf));
        err = subscribeRequestBuilder.Init(&writer);
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

        subscribeRequestBuilder.KeepSubscriptions(true);
        NL_TEST_ASSERT(apSuite, subscribeRequestBuilder.GetError() == CHIP_NO_ERROR);

        subscribeRequestBuilder.MinIntervalFloorSeconds(kMinInterval);
        NL_TEST_ASSERT(apSuite, subscribeRequestBuilder.GetError() == CHIP_NO_ERROR);

        subscribeRequestBuilder.MaxIntervalCeilingSeconds(kMaxIntervalCeiling);
        NL_TEST_ASSERT(apSuite, subscribeRequestBuilder.GetError() == CHIP_NO_ERROR);

        AttributePathIBs::Builder & attributePathListBuilder = subscribeRequestBuilder.CreateAttributeRequests();
        NL_TEST_ASSERT(apSuite, attributePathListBuilder.GetError() == CHIP_NO_ERROR);

        AttributePathIB::Builder & attributePathBuilder = attributePathListBuilder.CreatePath();
        NL_TEST_ASSERT(apSuite, attributePathListBuilder.GetError() == CHIP_NO_ERROR);

        attributePathBuilder.Node(1).Endpoint(2).Cluster(3).Attribute(4).ListIndex(5).EndOfAttributePathIB();
        err = attributePathBuilder.GetError();
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

        attributePathListBuilder.EndOfAttributePathIBs();
        err = attributePathListBuilder.GetError();
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

        subscribeRequestBuilder.IsFabricFiltered(false).EndOfSubscribeRequestMessage();
        NL_TEST_ASSERT(apSuite, subscribeRequestBuilder.GetError() == CHIP_NO_ERROR);

        NL_TEST_ASSERT(apSuite, subscribeRequestBuilder.GetError() == CHIP_NO_ERROR);
        err = writer.Finalize(&subscribeRequestbuf);
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

        err = readHandler.ProcessSubscribeRequest(std::move(subscribeRequestbuf));
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

        uint16_t idleModeInterval = readHandler.GetPublisherSelectedIntervalLimit();

        uint16_t minInterval;
        uint16_t maxInterval;
        readHandler.GetReportingIntervals(minInterval, maxInterval);

        NL_TEST_ASSERT(apSuite, minInterval == kMinInterval);
        NL_TEST_ASSERT(apSuite, maxInterval == idleModeInterval);
    }
    engine->Shutdown();

    NL_TEST_ASSERT(apSuite, ctx.GetExchangeManager().GetNumActiveExchanges() == 0);
}

/**
 * @brief Test validates that an ICD will choose its IdleModeInterval (GetPublisherSelectedIntervalLimit)
 *        as MaxInterval when the MaxIntervalCeiling is inferior.
 */
void TestReadInteraction::TestICDProcessSubscribeRequestInfMaxIntervalCeiling(nlTestSuite * apSuite, void * apContext)
{
    CHIP_ERROR err    = CHIP_NO_ERROR;
    TestContext & ctx = *static_cast<TestContext *>(apContext);
    System::PacketBufferTLVWriter writer;
    System::PacketBufferHandle subscribeRequestbuf = System::PacketBufferHandle::New(System::PacketBuffer::kMaxSize);
    SubscribeRequestMessage::Builder subscribeRequestBuilder;
    MockInteractionModelApp delegate;
    auto * engine = chip::app::InteractionModelEngine::GetInstance();
    err           = engine->Init(&ctx.GetExchangeManager(), &ctx.GetFabricTable(), app::reporting::GetDefaultReportScheduler());
    NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

    uint16_t kMinInterval        = 0;
    uint16_t kMaxIntervalCeiling = 1;

    Messaging::ExchangeContext * exchangeCtx = ctx.NewExchangeToAlice(nullptr, false);

    {
        ReadHandler readHandler(*engine, exchangeCtx, chip::app::ReadHandler::InteractionType::Read,
                                app::reporting::GetDefaultReportScheduler());

        writer.Init(std::move(subscribeRequestbuf));
        err = subscribeRequestBuilder.Init(&writer);
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

        subscribeRequestBuilder.KeepSubscriptions(true);
        NL_TEST_ASSERT(apSuite, subscribeRequestBuilder.GetError() == CHIP_NO_ERROR);

        subscribeRequestBuilder.MinIntervalFloorSeconds(kMinInterval);
        NL_TEST_ASSERT(apSuite, subscribeRequestBuilder.GetError() == CHIP_NO_ERROR);

        subscribeRequestBuilder.MaxIntervalCeilingSeconds(kMaxIntervalCeiling);
        NL_TEST_ASSERT(apSuite, subscribeRequestBuilder.GetError() == CHIP_NO_ERROR);

        AttributePathIBs::Builder & attributePathListBuilder = subscribeRequestBuilder.CreateAttributeRequests();
        NL_TEST_ASSERT(apSuite, attributePathListBuilder.GetError() == CHIP_NO_ERROR);

        AttributePathIB::Builder & attributePathBuilder = attributePathListBuilder.CreatePath();
        NL_TEST_ASSERT(apSuite, attributePathListBuilder.GetError() == CHIP_NO_ERROR);

        attributePathBuilder.Node(1).Endpoint(2).Cluster(3).Attribute(4).ListIndex(5).EndOfAttributePathIB();
        err = attributePathBuilder.GetError();
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

        attributePathListBuilder.EndOfAttributePathIBs();
        err = attributePathListBuilder.GetError();
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

        subscribeRequestBuilder.IsFabricFiltered(false).EndOfSubscribeRequestMessage();
        NL_TEST_ASSERT(apSuite, subscribeRequestBuilder.GetError() == CHIP_NO_ERROR);

        NL_TEST_ASSERT(apSuite, subscribeRequestBuilder.GetError() == CHIP_NO_ERROR);
        err = writer.Finalize(&subscribeRequestbuf);
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

        err = readHandler.ProcessSubscribeRequest(std::move(subscribeRequestbuf));
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

        uint16_t idleModeInterval = readHandler.GetPublisherSelectedIntervalLimit();

        uint16_t minInterval;
        uint16_t maxInterval;
        readHandler.GetReportingIntervals(minInterval, maxInterval);

        NL_TEST_ASSERT(apSuite, minInterval == kMinInterval);
        NL_TEST_ASSERT(apSuite, maxInterval == idleModeInterval);
    }
    engine->Shutdown();

    NL_TEST_ASSERT(apSuite, ctx.GetExchangeManager().GetNumActiveExchanges() == 0);
}

/**
 * @brief Test validates that an ICD will choose a multiple of its IdleModeInterval (GetPublisherSelectedIntervalLimit)
 *        as MaxInterval when the MinInterval > IdleModeInterval.
 */
void TestReadInteraction::TestICDProcessSubscribeRequestSupMinInterval(nlTestSuite * apSuite, void * apContext)
{
    CHIP_ERROR err    = CHIP_NO_ERROR;
    TestContext & ctx = *static_cast<TestContext *>(apContext);
    System::PacketBufferTLVWriter writer;
    System::PacketBufferHandle subscribeRequestbuf = System::PacketBufferHandle::New(System::PacketBuffer::kMaxSize);
    SubscribeRequestMessage::Builder subscribeRequestBuilder;
    MockInteractionModelApp delegate;
    auto * engine = chip::app::InteractionModelEngine::GetInstance();
    err           = engine->Init(&ctx.GetExchangeManager(), &ctx.GetFabricTable(), app::reporting::GetDefaultReportScheduler());
    NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

    uint16_t kMinInterval        = 3;
    uint16_t kMaxIntervalCeiling = 5;

    Messaging::ExchangeContext * exchangeCtx = ctx.NewExchangeToAlice(nullptr, false);

    {
        ReadHandler readHandler(*engine, exchangeCtx, chip::app::ReadHandler::InteractionType::Read,
                                app::reporting::GetDefaultReportScheduler());

        writer.Init(std::move(subscribeRequestbuf));
        err = subscribeRequestBuilder.Init(&writer);
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

        subscribeRequestBuilder.KeepSubscriptions(true);
        NL_TEST_ASSERT(apSuite, subscribeRequestBuilder.GetError() == CHIP_NO_ERROR);

        subscribeRequestBuilder.MinIntervalFloorSeconds(kMinInterval);
        NL_TEST_ASSERT(apSuite, subscribeRequestBuilder.GetError() == CHIP_NO_ERROR);

        subscribeRequestBuilder.MaxIntervalCeilingSeconds(kMaxIntervalCeiling);
        NL_TEST_ASSERT(apSuite, subscribeRequestBuilder.GetError() == CHIP_NO_ERROR);

        AttributePathIBs::Builder & attributePathListBuilder = subscribeRequestBuilder.CreateAttributeRequests();
        NL_TEST_ASSERT(apSuite, attributePathListBuilder.GetError() == CHIP_NO_ERROR);

        AttributePathIB::Builder & attributePathBuilder = attributePathListBuilder.CreatePath();
        NL_TEST_ASSERT(apSuite, attributePathListBuilder.GetError() == CHIP_NO_ERROR);

        attributePathBuilder.Node(1).Endpoint(2).Cluster(3).Attribute(4).ListIndex(5).EndOfAttributePathIB();
        err = attributePathBuilder.GetError();
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

        attributePathListBuilder.EndOfAttributePathIBs();
        err = attributePathListBuilder.GetError();
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

        subscribeRequestBuilder.IsFabricFiltered(false).EndOfSubscribeRequestMessage();
        NL_TEST_ASSERT(apSuite, subscribeRequestBuilder.GetError() == CHIP_NO_ERROR);

        NL_TEST_ASSERT(apSuite, subscribeRequestBuilder.GetError() == CHIP_NO_ERROR);
        err = writer.Finalize(&subscribeRequestbuf);
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

        err = readHandler.ProcessSubscribeRequest(std::move(subscribeRequestbuf));
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

        uint16_t idleModeInterval = readHandler.GetPublisherSelectedIntervalLimit();

        uint16_t minInterval;
        uint16_t maxInterval;
        readHandler.GetReportingIntervals(minInterval, maxInterval);

        NL_TEST_ASSERT(apSuite, minInterval == kMinInterval);
        NL_TEST_ASSERT(apSuite, maxInterval == (2 * idleModeInterval));
    }
    engine->Shutdown();

    NL_TEST_ASSERT(apSuite, ctx.GetExchangeManager().GetNumActiveExchanges() == 0);
}

/**
 * @brief Test validates that an ICD will choose a maximal value for an uint16 if the multiple of the IdleModeInterval
 *        is greater than variable size.
 */
void TestReadInteraction::TestICDProcessSubscribeRequestMaxMinInterval(nlTestSuite * apSuite, void * apContext)
{
    CHIP_ERROR err    = CHIP_NO_ERROR;
    TestContext & ctx = *static_cast<TestContext *>(apContext);
    System::PacketBufferTLVWriter writer;
    System::PacketBufferHandle subscribeRequestbuf = System::PacketBufferHandle::New(System::PacketBuffer::kMaxSize);
    SubscribeRequestMessage::Builder subscribeRequestBuilder;
    MockInteractionModelApp delegate;
    auto * engine = chip::app::InteractionModelEngine::GetInstance();
    err           = engine->Init(&ctx.GetExchangeManager(), &ctx.GetFabricTable(), app::reporting::GetDefaultReportScheduler());
    NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

    uint16_t kMinInterval        = System::Clock::Seconds16::max().count();
    uint16_t kMaxIntervalCeiling = System::Clock::Seconds16::max().count();

    Messaging::ExchangeContext * exchangeCtx = ctx.NewExchangeToAlice(nullptr, false);

    {
        ReadHandler readHandler(*engine, exchangeCtx, chip::app::ReadHandler::InteractionType::Read,
                                app::reporting::GetDefaultReportScheduler());

        writer.Init(std::move(subscribeRequestbuf));
        err = subscribeRequestBuilder.Init(&writer);
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

        subscribeRequestBuilder.KeepSubscriptions(true);
        NL_TEST_ASSERT(apSuite, subscribeRequestBuilder.GetError() == CHIP_NO_ERROR);

        subscribeRequestBuilder.MinIntervalFloorSeconds(kMinInterval);
        NL_TEST_ASSERT(apSuite, subscribeRequestBuilder.GetError() == CHIP_NO_ERROR);

        subscribeRequestBuilder.MaxIntervalCeilingSeconds(kMaxIntervalCeiling);
        NL_TEST_ASSERT(apSuite, subscribeRequestBuilder.GetError() == CHIP_NO_ERROR);

        AttributePathIBs::Builder & attributePathListBuilder = subscribeRequestBuilder.CreateAttributeRequests();
        NL_TEST_ASSERT(apSuite, attributePathListBuilder.GetError() == CHIP_NO_ERROR);

        AttributePathIB::Builder & attributePathBuilder = attributePathListBuilder.CreatePath();
        NL_TEST_ASSERT(apSuite, attributePathListBuilder.GetError() == CHIP_NO_ERROR);

        attributePathBuilder.Node(1).Endpoint(2).Cluster(3).Attribute(4).ListIndex(5).EndOfAttributePathIB();
        err = attributePathBuilder.GetError();
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

        attributePathListBuilder.EndOfAttributePathIBs();
        err = attributePathListBuilder.GetError();
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

        subscribeRequestBuilder.IsFabricFiltered(false).EndOfSubscribeRequestMessage();
        NL_TEST_ASSERT(apSuite, subscribeRequestBuilder.GetError() == CHIP_NO_ERROR);

        NL_TEST_ASSERT(apSuite, subscribeRequestBuilder.GetError() == CHIP_NO_ERROR);
        err = writer.Finalize(&subscribeRequestbuf);
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

        err = readHandler.ProcessSubscribeRequest(std::move(subscribeRequestbuf));
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

        uint16_t minInterval;
        uint16_t maxInterval;
        readHandler.GetReportingIntervals(minInterval, maxInterval);

        NL_TEST_ASSERT(apSuite, minInterval == kMinInterval);
        NL_TEST_ASSERT(apSuite, maxInterval == kMaxIntervalCeiling);
    }
    engine->Shutdown();

    NL_TEST_ASSERT(apSuite, ctx.GetExchangeManager().GetNumActiveExchanges() == 0);
}

/**
 * @brief Test validates that an ICD will choose the MaxIntervalCeiling as MaxInterval if the next multiple after the MinInterval
 *        is greater than the IdleModeInterval and MaxIntervalCeiling
 */
void TestReadInteraction::TestICDProcessSubscribeRequestInvalidIdleModeInterval(nlTestSuite * apSuite, void * apContext)
{
    CHIP_ERROR err    = CHIP_NO_ERROR;
    TestContext & ctx = *static_cast<TestContext *>(apContext);
    System::PacketBufferTLVWriter writer;
    System::PacketBufferHandle subscribeRequestbuf = System::PacketBufferHandle::New(System::PacketBuffer::kMaxSize);
    SubscribeRequestMessage::Builder subscribeRequestBuilder;
    MockInteractionModelApp delegate;
    auto * engine = chip::app::InteractionModelEngine::GetInstance();
    err           = engine->Init(&ctx.GetExchangeManager(), &ctx.GetFabricTable(), app::reporting::GetDefaultReportScheduler());
    NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

    uint16_t kMinInterval        = 3;
    uint16_t kMaxIntervalCeiling = 3;

    Messaging::ExchangeContext * exchangeCtx = ctx.NewExchangeToAlice(nullptr, false);

    {
        ReadHandler readHandler(*engine, exchangeCtx, chip::app::ReadHandler::InteractionType::Read,
                                app::reporting::GetDefaultReportScheduler());

        writer.Init(std::move(subscribeRequestbuf));
        err = subscribeRequestBuilder.Init(&writer);
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

        subscribeRequestBuilder.KeepSubscriptions(true);
        NL_TEST_ASSERT(apSuite, subscribeRequestBuilder.GetError() == CHIP_NO_ERROR);

        subscribeRequestBuilder.MinIntervalFloorSeconds(kMinInterval);
        NL_TEST_ASSERT(apSuite, subscribeRequestBuilder.GetError() == CHIP_NO_ERROR);

        subscribeRequestBuilder.MaxIntervalCeilingSeconds(kMaxIntervalCeiling);
        NL_TEST_ASSERT(apSuite, subscribeRequestBuilder.GetError() == CHIP_NO_ERROR);

        AttributePathIBs::Builder & attributePathListBuilder = subscribeRequestBuilder.CreateAttributeRequests();
        NL_TEST_ASSERT(apSuite, attributePathListBuilder.GetError() == CHIP_NO_ERROR);

        AttributePathIB::Builder & attributePathBuilder = attributePathListBuilder.CreatePath();
        NL_TEST_ASSERT(apSuite, attributePathListBuilder.GetError() == CHIP_NO_ERROR);

        attributePathBuilder.Node(1).Endpoint(2).Cluster(3).Attribute(4).ListIndex(5).EndOfAttributePathIB();
        err = attributePathBuilder.GetError();
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

        attributePathListBuilder.EndOfAttributePathIBs();
        err = attributePathListBuilder.GetError();
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

        subscribeRequestBuilder.IsFabricFiltered(false).EndOfSubscribeRequestMessage();
        NL_TEST_ASSERT(apSuite, subscribeRequestBuilder.GetError() == CHIP_NO_ERROR);

        NL_TEST_ASSERT(apSuite, subscribeRequestBuilder.GetError() == CHIP_NO_ERROR);
        err = writer.Finalize(&subscribeRequestbuf);
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

        err = readHandler.ProcessSubscribeRequest(std::move(subscribeRequestbuf));
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

        uint16_t minInterval;
        uint16_t maxInterval;
        readHandler.GetReportingIntervals(minInterval, maxInterval);

        NL_TEST_ASSERT(apSuite, minInterval == kMinInterval);
        NL_TEST_ASSERT(apSuite, maxInterval == kMaxIntervalCeiling);
    }
    engine->Shutdown();

    NL_TEST_ASSERT(apSuite, ctx.GetExchangeManager().GetNumActiveExchanges() == 0);
}

#endif // CHIP_CONFIG_ENABLE_ICD_SERVER

void TestReadInteraction::TestSubscribeRoundtrip(nlTestSuite * apSuite, void * apContext)
{
    TestContext & ctx = *static_cast<TestContext *>(apContext);
    CHIP_ERROR err    = CHIP_NO_ERROR;

    Messaging::ReliableMessageMgr * rm = ctx.GetExchangeManager().GetReliableMessageMgr();
    // Shouldn't have anything in the retransmit table when starting the test.
    NL_TEST_ASSERT(apSuite, rm->TestGetCountRetransTable() == 0);

    MockInteractionModelApp delegate;
    auto * engine                         = chip::app::InteractionModelEngine::GetInstance();
    ReportSchedulerImpl * reportScheduler = app::reporting::GetDefaultReportScheduler();
    err                                   = engine->Init(&ctx.GetExchangeManager(), &ctx.GetFabricTable(), reportScheduler);
    NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
    NL_TEST_ASSERT(apSuite, !delegate.mGotEventResponse);

    ReadPrepareParams readPrepareParams(ctx.GetSessionBobToAlice());
    chip::app::EventPathParams eventPathParams[2];
    readPrepareParams.mpEventPathParamsList                = eventPathParams;
    readPrepareParams.mpEventPathParamsList[0].mEndpointId = kTestEventEndpointId;
    readPrepareParams.mpEventPathParamsList[0].mClusterId  = kTestEventClusterId;
    readPrepareParams.mpEventPathParamsList[0].mEventId    = kTestEventIdDebug;

    readPrepareParams.mpEventPathParamsList[1].mEndpointId = kTestEventEndpointId;
    readPrepareParams.mpEventPathParamsList[1].mClusterId  = kTestEventClusterId;
    readPrepareParams.mpEventPathParamsList[1].mEventId    = kTestEventIdCritical;

    readPrepareParams.mEventPathParamsListSize = 2;

    chip::app::AttributePathParams attributePathParams[2];
    readPrepareParams.mpAttributePathParamsList                 = attributePathParams;
    readPrepareParams.mpAttributePathParamsList[0].mEndpointId  = kTestEndpointId;
    readPrepareParams.mpAttributePathParamsList[0].mClusterId   = kTestClusterId;
    readPrepareParams.mpAttributePathParamsList[0].mAttributeId = 1;

    readPrepareParams.mpAttributePathParamsList[1].mEndpointId  = kTestEndpointId;
    readPrepareParams.mpAttributePathParamsList[1].mClusterId   = kTestClusterId;
    readPrepareParams.mpAttributePathParamsList[1].mAttributeId = 2;

    readPrepareParams.mAttributePathParamsListSize = 2;

    readPrepareParams.mMinIntervalFloorSeconds   = 1;
    readPrepareParams.mMaxIntervalCeilingSeconds = 2;
    printf("\nSend first subscribe request message to Node: %" PRIu64 "\n", chip::kTestDeviceNodeId);

    {
        app::ReadClient readClient(chip::app::InteractionModelEngine::GetInstance(), &ctx.GetExchangeManager(), delegate,
                                   chip::app::ReadClient::InteractionType::Subscribe);

        err = readClient.SendRequest(readPrepareParams);
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

        ctx.DrainAndServiceIO();

        NL_TEST_ASSERT(apSuite, delegate.mGotReport);
    }

    delegate.mNumAttributeResponse       = 0;
    readPrepareParams.mKeepSubscriptions = false;

    {
        app::ReadClient readClient(chip::app::InteractionModelEngine::GetInstance(), &ctx.GetExchangeManager(), delegate,
                                   chip::app::ReadClient::InteractionType::Subscribe);
        delegate.mGotReport = false;
        err                 = readClient.SendRequest(readPrepareParams);
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

        ctx.DrainAndServiceIO();

        NL_TEST_ASSERT(apSuite, engine->GetNumActiveReadHandlers() == 1);
        NL_TEST_ASSERT(apSuite, engine->ActiveHandlerAt(0) != nullptr);
        delegate.mpReadHandler = engine->ActiveHandlerAt(0);

        NL_TEST_ASSERT(apSuite, delegate.mGotEventResponse);
        NL_TEST_ASSERT(apSuite, delegate.mGotReport);
        NL_TEST_ASSERT(apSuite, delegate.mNumAttributeResponse == 2);
        NL_TEST_ASSERT(apSuite, engine->GetNumActiveReadHandlers(ReadHandler::InteractionType::Subscribe) == 1);

        GenerateEvents(apSuite, apContext);
        chip::app::AttributePathParams dirtyPath1;
        dirtyPath1.mClusterId   = kTestClusterId;
        dirtyPath1.mEndpointId  = kTestEndpointId;
        dirtyPath1.mAttributeId = 1;

        chip::app::AttributePathParams dirtyPath2;
        dirtyPath2.mClusterId   = kTestClusterId;
        dirtyPath2.mEndpointId  = kTestEndpointId;
        dirtyPath2.mAttributeId = 2;

        chip::app::AttributePathParams dirtyPath3;
        dirtyPath3.mClusterId   = kTestClusterId;
        dirtyPath3.mEndpointId  = kTestEndpointId;
        dirtyPath3.mAttributeId = 2;
        dirtyPath3.mListIndex   = 1;

        chip::app::AttributePathParams dirtyPath4;
        dirtyPath4.mClusterId   = kTestClusterId;
        dirtyPath4.mEndpointId  = kTestEndpointId;
        dirtyPath4.mAttributeId = 3;

        chip::app::AttributePathParams dirtyPath5;
        dirtyPath5.mClusterId   = kTestClusterId;
        dirtyPath5.mEndpointId  = kTestEndpointId;
        dirtyPath5.mAttributeId = 4;

        // Test report with 2 different path

        // Advance monotonic timestamp for min interval to elapse
        gMockClock.AdvanceMonotonic(System::Clock::Seconds16(readPrepareParams.mMinIntervalFloorSeconds));
        ctx.GetIOContext().DriveIO();

        delegate.mGotReport            = false;
        delegate.mGotEventResponse     = false;
        delegate.mNumAttributeResponse = 0;

        err = engine->GetReportingEngine().SetDirty(dirtyPath1);
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
        err = engine->GetReportingEngine().SetDirty(dirtyPath2);
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

        ctx.DrainAndServiceIO();

        NL_TEST_ASSERT(apSuite, delegate.mGotReport);
        NL_TEST_ASSERT(apSuite, delegate.mGotEventResponse == true);
        NL_TEST_ASSERT(apSuite, delegate.mNumAttributeResponse == 2);

        // Test report with 2 different path, and 1 same path
        // Advance monotonic timestamp for min interval to elapse
        gMockClock.AdvanceMonotonic(System::Clock::Seconds16(readPrepareParams.mMinIntervalFloorSeconds));
        ctx.GetIOContext().DriveIO();

        delegate.mGotReport            = false;
        delegate.mNumAttributeResponse = 0;
        err                            = engine->GetReportingEngine().SetDirty(dirtyPath1);
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
        err = engine->GetReportingEngine().SetDirty(dirtyPath2);
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
        err = engine->GetReportingEngine().SetDirty(dirtyPath2);
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

        ctx.DrainAndServiceIO();

        NL_TEST_ASSERT(apSuite, delegate.mGotReport);
        NL_TEST_ASSERT(apSuite, delegate.mNumAttributeResponse == 2);

        // Test report with 3 different path, and one path is overlapped with another
        // Advance monotonic timestamp for min interval to elapse
        gMockClock.AdvanceMonotonic(System::Clock::Seconds16(readPrepareParams.mMinIntervalFloorSeconds));
        ctx.GetIOContext().DriveIO();

        delegate.mGotReport            = false;
        delegate.mNumAttributeResponse = 0;
        err                            = engine->GetReportingEngine().SetDirty(dirtyPath1);
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
        err = engine->GetReportingEngine().SetDirty(dirtyPath2);
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
        err = engine->GetReportingEngine().SetDirty(dirtyPath3);
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

        ctx.DrainAndServiceIO();

        NL_TEST_ASSERT(apSuite, delegate.mGotReport);
        NL_TEST_ASSERT(apSuite, delegate.mNumAttributeResponse == 2);

        // Test report with 3 different path, all are not overlapped, one path is not interested for current subscription
        // Advance monotonic timestamp for min interval to elapse
        gMockClock.AdvanceMonotonic(System::Clock::Seconds16(readPrepareParams.mMinIntervalFloorSeconds));
        ctx.GetIOContext().DriveIO();

        delegate.mGotReport            = false;
        delegate.mNumAttributeResponse = 0;
        err                            = engine->GetReportingEngine().SetDirty(dirtyPath1);
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
        err = engine->GetReportingEngine().SetDirty(dirtyPath2);
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
        err = engine->GetReportingEngine().SetDirty(dirtyPath4);
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

        ctx.DrainAndServiceIO();

        NL_TEST_ASSERT(apSuite, delegate.mGotReport);
        NL_TEST_ASSERT(apSuite, delegate.mNumAttributeResponse == 2);

        // Test empty report
        // Advance monotonic timestamp for min interval to elapse
        gMockClock.AdvanceMonotonic(System::Clock::Seconds16(readPrepareParams.mMaxIntervalCeilingSeconds));
        ctx.GetIOContext().DriveIO();

        NL_TEST_ASSERT(apSuite, engine->GetReportingEngine().IsRunScheduled());
        delegate.mGotReport            = false;
        delegate.mNumAttributeResponse = 0;

        ctx.DrainAndServiceIO();

        NL_TEST_ASSERT(apSuite, delegate.mNumAttributeResponse == 0);
    }

    // By now we should have closed all exchanges and sent all pending acks, so
    // there should be no queued-up things in the retransmit table.
    NL_TEST_ASSERT(apSuite, rm->TestGetCountRetransTable() == 0);

    NL_TEST_ASSERT(apSuite, engine->GetNumActiveReadClients() == 0);
    engine->Shutdown();
    NL_TEST_ASSERT(apSuite, ctx.GetExchangeManager().GetNumActiveExchanges() == 0);
}

void TestReadInteraction::TestSubscribeUrgentWildcardEvent(nlTestSuite * apSuite, void * apContext)
{
    TestContext & ctx = *static_cast<TestContext *>(apContext);
    CHIP_ERROR err    = CHIP_NO_ERROR;

    Messaging::ReliableMessageMgr * rm = ctx.GetExchangeManager().GetReliableMessageMgr();
    // Shouldn't have anything in the retransmit table when starting the test.
    NL_TEST_ASSERT(apSuite, rm->TestGetCountRetransTable() == 0);

    MockInteractionModelApp delegate;
    MockInteractionModelApp nonUrgentDelegate;
    auto * engine                         = chip::app::InteractionModelEngine::GetInstance();
    ReportSchedulerImpl * reportScheduler = app::reporting::GetDefaultReportScheduler();
    err                                   = engine->Init(&ctx.GetExchangeManager(), &ctx.GetFabricTable(), reportScheduler);
    NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
    NL_TEST_ASSERT(apSuite, !delegate.mGotEventResponse);
    NL_TEST_ASSERT(apSuite, !nonUrgentDelegate.mGotEventResponse);

    ReadPrepareParams readPrepareParams(ctx.GetSessionBobToAlice());
    chip::app::EventPathParams eventPathParams[2];
    readPrepareParams.mpEventPathParamsList                = eventPathParams;
    readPrepareParams.mpEventPathParamsList[0].mEndpointId = kTestEventEndpointId;
    readPrepareParams.mpEventPathParamsList[0].mClusterId  = kTestEventClusterId;

    readPrepareParams.mpEventPathParamsList[1].mEndpointId = kTestEventEndpointId;
    readPrepareParams.mpEventPathParamsList[1].mClusterId  = kTestEventClusterId;
    readPrepareParams.mpEventPathParamsList[1].mEventId    = kTestEventIdCritical;

    readPrepareParams.mEventPathParamsListSize = 2;

    readPrepareParams.mpAttributePathParamsList    = nullptr;
    readPrepareParams.mAttributePathParamsListSize = 0;

    readPrepareParams.mMinIntervalFloorSeconds   = 1;
    readPrepareParams.mMaxIntervalCeilingSeconds = 3600;
    printf("\nSend first subscribe request message with wildcard urgent event to Node: %" PRIu64 "\n", chip::kTestDeviceNodeId);

    readPrepareParams.mKeepSubscriptions = true;

    {
        app::ReadClient nonUrgentReadClient(chip::app::InteractionModelEngine::GetInstance(), &ctx.GetExchangeManager(),
                                            nonUrgentDelegate, chip::app::ReadClient::InteractionType::Subscribe);
        nonUrgentDelegate.mGotReport = false;
        err                          = nonUrgentReadClient.SendRequest(readPrepareParams);
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

        app::ReadClient readClient(chip::app::InteractionModelEngine::GetInstance(), &ctx.GetExchangeManager(), delegate,
                                   chip::app::ReadClient::InteractionType::Subscribe);
        readPrepareParams.mpEventPathParamsList[0].mIsUrgentEvent = true;
        delegate.mGotReport                                       = false;
        err                                                       = readClient.SendRequest(readPrepareParams);
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

        ctx.DrainAndServiceIO();
        System::Clock::Timestamp startTime = gMockClock.GetMonotonicTimestamp();

        NL_TEST_ASSERT(apSuite, engine->GetNumActiveReadHandlers() == 2);
        NL_TEST_ASSERT(apSuite, engine->ActiveHandlerAt(0) != nullptr);
        nonUrgentDelegate.mpReadHandler = engine->ActiveHandlerAt(0);
        NL_TEST_ASSERT(apSuite, engine->ActiveHandlerAt(1) != nullptr);
        delegate.mpReadHandler = engine->ActiveHandlerAt(1);

        NL_TEST_ASSERT(apSuite, delegate.mGotEventResponse);
        NL_TEST_ASSERT(apSuite, nonUrgentDelegate.mGotEventResponse);
        NL_TEST_ASSERT(apSuite, engine->GetNumActiveReadHandlers(ReadHandler::InteractionType::Subscribe) == 2);

        GenerateEvents(apSuite, apContext);

        NL_TEST_ASSERT(apSuite, reportScheduler->GetMinTimestampForHandler(delegate.mpReadHandler) > startTime);
        NL_TEST_ASSERT(apSuite, delegate.mpReadHandler->IsDirty());
        delegate.mGotEventResponse = false;
        delegate.mGotReport        = false;

        NL_TEST_ASSERT(apSuite, reportScheduler->GetMinTimestampForHandler(nonUrgentDelegate.mpReadHandler) > startTime);
        NL_TEST_ASSERT(apSuite, !nonUrgentDelegate.mpReadHandler->IsDirty());
        nonUrgentDelegate.mGotEventResponse = false;
        nonUrgentDelegate.mGotReport        = false;

        // wait for min interval 1 seconds (in test, we use 0.6 seconds considering the time variation), expect no event is
        // received, then wait for 0.8 seconds, then the urgent event would be sent out
        //  currently DriveIOUntil will call `DriveIO` at least once, which means that if there is any CPU scheduling issues,
        // there's a chance 1.9s will already have elapsed by the time we get there, which will result in DriveIO being called when
        // it shouldn't. Better fix could happen inside DriveIOUntil, not sure the sideeffect there.

        // Advance monotonic looping to allow events to trigger
        gMockClock.AdvanceMonotonic(System::Clock::Milliseconds32(600));
        ctx.GetIOContext().DriveIO();

        NL_TEST_ASSERT(apSuite, !delegate.mGotEventResponse);
        NL_TEST_ASSERT(apSuite, !nonUrgentDelegate.mGotEventResponse);

        // Advance monotonic timestamp for min interval to elapse
        startTime = gMockClock.GetMonotonicTimestamp();
        gMockClock.AdvanceMonotonic(System::Clock::Milliseconds32(800));

        // Service Timer expired event
        ctx.GetIOContext().DriveIO();

        // Service Engine Run
        ctx.GetIOContext().DriveIO();

        // Service EventManagement event
        ctx.GetIOContext().DriveIO();

        NL_TEST_ASSERT(apSuite, delegate.mGotEventResponse);
        NL_TEST_ASSERT(apSuite, !nonUrgentDelegate.mGotEventResponse);

        // Since we just sent a report for our urgent subscription, the min interval of the urgent subcription should have been
        // updated
        NL_TEST_ASSERT(apSuite,
                       reportScheduler->GetMinTimestampForHandler(delegate.mpReadHandler) > gMockClock.GetMonotonicTimestamp());
        NL_TEST_ASSERT(apSuite, !delegate.mpReadHandler->IsDirty());
        delegate.mGotEventResponse = false;

        // For our non-urgent subscription, we did not send anything, so the min interval should of the non urgent subcription
        // should be in the past
        NL_TEST_ASSERT(apSuite,
                       reportScheduler->GetMinTimestampForHandler(nonUrgentDelegate.mpReadHandler) <
                           gMockClock.GetMonotonicTimestamp());
        NL_TEST_ASSERT(apSuite, !nonUrgentDelegate.mpReadHandler->IsDirty());

        // Advance monotonic timestamp for min interval to elapse
        gMockClock.AdvanceMonotonic(System::Clock::Milliseconds32(2100));
        ctx.GetIOContext().DriveIO();

        // No reporting should have happened.
        NL_TEST_ASSERT(apSuite, !delegate.mGotEventResponse);
        NL_TEST_ASSERT(apSuite, !nonUrgentDelegate.mGotEventResponse);

        // The min-interval should have elapsed for urgen subscription, and our handler should still
        // not be dirty or reportable.
        NL_TEST_ASSERT(apSuite,
                       reportScheduler->GetMinTimestampForHandler(delegate.mpReadHandler) <
                           System::SystemClock().GetMonotonicTimestamp());
        NL_TEST_ASSERT(apSuite, !delegate.mpReadHandler->IsDirty());
        NL_TEST_ASSERT(apSuite, !delegate.mpReadHandler->ShouldStartReporting());

        // And the non-urgent one should not have changed state either, since
        // it's waiting for the max-interval.
        NL_TEST_ASSERT(apSuite,
                       reportScheduler->GetMinTimestampForHandler(nonUrgentDelegate.mpReadHandler) <
                           System::SystemClock().GetMonotonicTimestamp());
        NL_TEST_ASSERT(apSuite,
                       reportScheduler->GetMaxTimestampForHandler(nonUrgentDelegate.mpReadHandler) >
                           System::SystemClock().GetMonotonicTimestamp());
        NL_TEST_ASSERT(apSuite, !nonUrgentDelegate.mpReadHandler->IsDirty());
        NL_TEST_ASSERT(apSuite, !nonUrgentDelegate.mpReadHandler->ShouldStartReporting());

        // There should be no reporting run scheduled.  This is very important;
        // otherwise we can get a false-positive pass below because the run was
        // already scheduled by here.
        NL_TEST_ASSERT(apSuite, !InteractionModelEngine::GetInstance()->GetReportingEngine().IsRunScheduled());

        // Generate some events, which should get reported.
        GenerateEvents(apSuite, apContext);

        // Urgent read handler should now be dirty, and reportable.
        NL_TEST_ASSERT(apSuite, delegate.mpReadHandler->IsDirty());
        NL_TEST_ASSERT(apSuite, delegate.mpReadHandler->ShouldStartReporting());
        NL_TEST_ASSERT(apSuite, reportScheduler->IsReadHandlerReportable(delegate.mpReadHandler));

        // Non-urgent read handler should not be reportable.
        NL_TEST_ASSERT(apSuite, !nonUrgentDelegate.mpReadHandler->IsDirty());
        NL_TEST_ASSERT(apSuite, !nonUrgentDelegate.mpReadHandler->ShouldStartReporting());

        // Still no reporting should have happened.
        NL_TEST_ASSERT(apSuite, !delegate.mGotEventResponse);
        NL_TEST_ASSERT(apSuite, !nonUrgentDelegate.mGotEventResponse);

        ctx.DrainAndServiceIO();

        // Should get those urgent events reported.
        NL_TEST_ASSERT(apSuite, delegate.mGotEventResponse);

        // Should get nothing reported on the non-urgent handler.
        NL_TEST_ASSERT(apSuite, !nonUrgentDelegate.mGotEventResponse);
    }

    // By now we should have closed all exchanges and sent all pending acks, so
    // there should be no queued-up things in the retransmit table.
    NL_TEST_ASSERT(apSuite, rm->TestGetCountRetransTable() == 0);

    NL_TEST_ASSERT(apSuite, engine->GetNumActiveReadClients() == 0);
    engine->Shutdown();
    NL_TEST_ASSERT(apSuite, ctx.GetExchangeManager().GetNumActiveExchanges() == 0);
}

void TestReadInteraction::TestSubscribeWildcard(nlTestSuite * apSuite, void * apContext)
{
    TestContext & ctx = *static_cast<TestContext *>(apContext);
    CHIP_ERROR err    = CHIP_NO_ERROR;

    Messaging::ReliableMessageMgr * rm = ctx.GetExchangeManager().GetReliableMessageMgr();
    // Shouldn't have anything in the retransmit table when starting the test.
    NL_TEST_ASSERT(apSuite, rm->TestGetCountRetransTable() == 0);

    GenerateEvents(apSuite, apContext);

    MockInteractionModelApp delegate;
    ReportSchedulerImpl * reportScheduler = app::reporting::GetDefaultReportScheduler();
    auto * engine                         = chip::app::InteractionModelEngine::GetInstance();
    err                                   = engine->Init(&ctx.GetExchangeManager(), &ctx.GetFabricTable(), reportScheduler);
    NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
    NL_TEST_ASSERT(apSuite, !delegate.mGotEventResponse);

    ReadPrepareParams readPrepareParams(ctx.GetSessionBobToAlice());
    readPrepareParams.mEventPathParamsListSize = 0;

    std::unique_ptr<chip::app::AttributePathParams[]> attributePathParams(new chip::app::AttributePathParams[2]);
    // Subscribe to full wildcard paths, repeat twice to ensure chunking.
    readPrepareParams.mpAttributePathParamsList    = attributePathParams.get();
    readPrepareParams.mAttributePathParamsListSize = 2;

    readPrepareParams.mMinIntervalFloorSeconds   = 0;
    readPrepareParams.mMaxIntervalCeilingSeconds = 1;
    printf("\nSend subscribe request message to Node: %" PRIu64 "\n", chip::kTestDeviceNodeId);

    {
        app::ReadClient readClient(chip::app::InteractionModelEngine::GetInstance(), &ctx.GetExchangeManager(), delegate,
                                   chip::app::ReadClient::InteractionType::Subscribe);

        delegate.mGotReport = false;

        attributePathParams.release();
        err = readClient.SendAutoResubscribeRequest(std::move(readPrepareParams));
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

        ctx.DrainAndServiceIO();

        NL_TEST_ASSERT(apSuite, delegate.mGotReport);

#if CHIP_CONFIG_ENABLE_EVENTLIST_ATTRIBUTE
        // Mock attribute storage in src/app/util/mock/attribute-storage.cpp
        // has the following items
        // - Endpoint 0xFFFE
        //    - cluster 0xFFF1'FC01 (2 attributes)
        //    - cluster 0xFFF1'FC02 (3 attributes)
        // - Endpoint 0xFFFD
        //    - cluster 0xFFF1'FC01 (2 attributes)
        //    - cluster 0xFFF1'FC02 (4 attributes)
        //    - cluster 0xFFF1'FC03 (5 attributes)
        // - Endpoint 0xFFFC
        //    - cluster 0xFFF1'FC01 (3 attributes)
        //    - cluster 0xFFF1'FC02 (6 attributes)
        //    - cluster 0xFFF1'FC03 (2 attributes)
        //    - cluster 0xFFF1'FC04 (2 attributes)
        //
        // For at total of 29 attributes. There are two wildcard subscription
        // paths, for a total of 58 attributes.
        //
        // Attribute 0xFFFC::0xFFF1'FC02::0xFFF1'0004 (kMockEndpoint3::MockClusterId(2)::MockAttributeId(4))
        // is a list of kMockAttribute4ListLength elements of size 256 bytes each, which cannot fit in a single
        // packet, so gets list chunking applied to it.
        //
        // Because delegate.mNumAttributeResponse counts AttributeDataIB instances, not attributes,
        // the count will depend on exactly how the list for attribute
        // 0xFFFC::0xFFF1'FC02::0xFFF1'0004 is chunked.  For each of the two instances of that attribute
        // in the response, there will be one AttributeDataIB for the start of the list (which will include
        // some number of 256-byte elements), then one AttributeDataIB for each of the remaining elements.
        //
        // When EventList is enabled, for the first report for the list attribute we receive three
        // of its items in the initial list, then the remaining items.  For the second report we
        // receive 2 items in the initial list followed by the remaining items.
        constexpr size_t kExpectedAttributeResponse = 29 * 2 + (kMockAttribute4ListLength - 3) + (kMockAttribute4ListLength - 2);
#else
        // When EventList is not enabled, the packet boundaries shift and for the first
        // report for the list attribute we receive four of its items in the initial list,
        // then additional items.  For the second report we receive 4 items in
        // the initial list followed by additional items.
        constexpr size_t kExpectedAttributeResponse = 29 * 2 + (kMockAttribute4ListLength - 4) + (kMockAttribute4ListLength - 4);
#endif
        NL_TEST_ASSERT(apSuite, delegate.mNumAttributeResponse == kExpectedAttributeResponse);
        NL_TEST_ASSERT(apSuite, delegate.mNumArrayItems == 12);
        NL_TEST_ASSERT(apSuite, engine->GetNumActiveReadHandlers(ReadHandler::InteractionType::Subscribe) == 1);
        NL_TEST_ASSERT(apSuite, engine->ActiveHandlerAt(0) != nullptr);
        delegate.mpReadHandler = engine->ActiveHandlerAt(0);

        // Set a concrete path dirty
        {
            delegate.mGotReport            = false;
            delegate.mNumAttributeResponse = 0;

            AttributePathParams dirtyPath;
            dirtyPath.mEndpointId  = Test::kMockEndpoint2;
            dirtyPath.mClusterId   = Test::MockClusterId(3);
            dirtyPath.mAttributeId = Test::MockAttributeId(1);

            err = engine->GetReportingEngine().SetDirty(dirtyPath);
            NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

            ctx.DrainAndServiceIO();

            NL_TEST_ASSERT(apSuite, delegate.mGotReport);
            // We subscribed wildcard path twice, so we will receive two reports here.
            NL_TEST_ASSERT(apSuite, delegate.mNumAttributeResponse == 2);
        }

        // Set a endpoint dirty
        {
            delegate.mGotReport            = false;
            delegate.mNumAttributeResponse = 0;
            delegate.mNumArrayItems        = 0;

            AttributePathParams dirtyPath;
            dirtyPath.mEndpointId = Test::kMockEndpoint3;

            err = engine->GetReportingEngine().SetDirty(dirtyPath);
            NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

            //
            // We need to DrainAndServiceIO() until attribute callback will be called.
            // This is not correct behavior and is tracked in Issue #17528.
            //
            int last;
            do
            {
                last = delegate.mNumAttributeResponse;
                ctx.DrainAndServiceIO();
            } while (last != delegate.mNumAttributeResponse);

            // Mock endpoint3 has 13 attributes in total, and we subscribed twice.
            // And attribute 3/2/4 is a list with 6 elements and list chunking
            // is applied to it, but the way the packet boundaries fall we get two of
            // its items as a single list, followed by 4 more items for one
            // of our subscriptions, and 3 items as a single list followed by 3
            // more items for the other.
            //
            // Thus we should receive 13*2 + 4 + 3 = 33 attribute data in total.
            ChipLogError(DataManagement, "RESPO: %d\n", delegate.mNumAttributeResponse);
            NL_TEST_ASSERT(apSuite, delegate.mNumAttributeResponse == 33);
            NL_TEST_ASSERT(apSuite, delegate.mNumArrayItems == 12);
        }
    }

    NL_TEST_ASSERT(apSuite, engine->GetNumActiveReadClients() == 0);
    engine->Shutdown();
    NL_TEST_ASSERT(apSuite, ctx.GetExchangeManager().GetNumActiveExchanges() == 0);
}

// Subscribe (wildcard, C3, A1), then setDirty (E2, C3, wildcard), receive one attribute after setDirty
void TestReadInteraction::TestSubscribePartialOverlap(nlTestSuite * apSuite, void * apContext)
{
    TestContext & ctx = *static_cast<TestContext *>(apContext);
    CHIP_ERROR err    = CHIP_NO_ERROR;

    Messaging::ReliableMessageMgr * rm = ctx.GetExchangeManager().GetReliableMessageMgr();
    // Shouldn't have anything in the retransmit table when starting the test.
    NL_TEST_ASSERT(apSuite, rm->TestGetCountRetransTable() == 0);

    MockInteractionModelApp delegate;
    ReportSchedulerImpl * reportScheduler = app::reporting::GetDefaultReportScheduler();
    auto * engine                         = chip::app::InteractionModelEngine::GetInstance();
    err                                   = engine->Init(&ctx.GetExchangeManager(), &ctx.GetFabricTable(), reportScheduler);
    NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
    NL_TEST_ASSERT(apSuite, !delegate.mGotEventResponse);

    ReadPrepareParams readPrepareParams(ctx.GetSessionBobToAlice());
    readPrepareParams.mEventPathParamsListSize = 0;

    std::unique_ptr<chip::app::AttributePathParams[]> attributePathParams(new chip::app::AttributePathParams[2]);
    attributePathParams[0].mClusterId              = Test::MockClusterId(3);
    attributePathParams[0].mAttributeId            = Test::MockAttributeId(1);
    readPrepareParams.mpAttributePathParamsList    = attributePathParams.get();
    readPrepareParams.mAttributePathParamsListSize = 1;

    readPrepareParams.mMinIntervalFloorSeconds   = 0;
    readPrepareParams.mMaxIntervalCeilingSeconds = 1;
    printf("\nSend subscribe request message to Node: %" PRIu64 "\n", chip::kTestDeviceNodeId);

    {
        app::ReadClient readClient(chip::app::InteractionModelEngine::GetInstance(), &ctx.GetExchangeManager(), delegate,
                                   chip::app::ReadClient::InteractionType::Subscribe);

        delegate.mGotReport = false;

        attributePathParams.release();
        err = readClient.SendAutoResubscribeRequest(std::move(readPrepareParams));
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

        ctx.DrainAndServiceIO();

        NL_TEST_ASSERT(apSuite, delegate.mGotReport);

        NL_TEST_ASSERT(apSuite, delegate.mNumAttributeResponse == 1);
        NL_TEST_ASSERT(apSuite, engine->GetNumActiveReadHandlers(ReadHandler::InteractionType::Subscribe) == 1);
        NL_TEST_ASSERT(apSuite, engine->ActiveHandlerAt(0) != nullptr);
        delegate.mpReadHandler = engine->ActiveHandlerAt(0);

        // Set a partial overlapped path dirty
        {
            delegate.mGotReport            = false;
            delegate.mNumAttributeResponse = 0;

            AttributePathParams dirtyPath;
            dirtyPath.mEndpointId = Test::kMockEndpoint2;
            dirtyPath.mClusterId  = Test::MockClusterId(3);

            err = engine->GetReportingEngine().SetDirty(dirtyPath);
            NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

            ctx.DrainAndServiceIO();

            NL_TEST_ASSERT(apSuite, delegate.mGotReport);
            NL_TEST_ASSERT(apSuite, delegate.mNumAttributeResponse == 1);
            NL_TEST_ASSERT(apSuite, delegate.mReceivedAttributePaths[0].mEndpointId == Test::kMockEndpoint2);
            NL_TEST_ASSERT(apSuite, delegate.mReceivedAttributePaths[0].mClusterId == Test::MockClusterId(3));
            NL_TEST_ASSERT(apSuite, delegate.mReceivedAttributePaths[0].mAttributeId == Test::MockAttributeId(1));
        }
    }

    NL_TEST_ASSERT(apSuite, engine->GetNumActiveReadClients() == 0);
    engine->Shutdown();
    NL_TEST_ASSERT(apSuite, ctx.GetExchangeManager().GetNumActiveExchanges() == 0);
}

// Subscribe (E2, C3, A1), then setDirty (wildcard, wildcard, wildcard), receive one attribute after setDirty
void TestReadInteraction::TestSubscribeSetDirtyFullyOverlap(nlTestSuite * apSuite, void * apContext)
{
    TestContext & ctx = *static_cast<TestContext *>(apContext);
    CHIP_ERROR err    = CHIP_NO_ERROR;

    Messaging::ReliableMessageMgr * rm = ctx.GetExchangeManager().GetReliableMessageMgr();
    // Shouldn't have anything in the retransmit table when starting the test.
    NL_TEST_ASSERT(apSuite, rm->TestGetCountRetransTable() == 0);

    MockInteractionModelApp delegate;
    ReportSchedulerImpl * reportScheduler = app::reporting::GetDefaultReportScheduler();
    auto * engine                         = chip::app::InteractionModelEngine::GetInstance();
    err                                   = engine->Init(&ctx.GetExchangeManager(), &ctx.GetFabricTable(), reportScheduler);
    NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
    NL_TEST_ASSERT(apSuite, !delegate.mGotEventResponse);

    ReadPrepareParams readPrepareParams(ctx.GetSessionBobToAlice());
    readPrepareParams.mEventPathParamsListSize = 0;

    std::unique_ptr<chip::app::AttributePathParams[]> attributePathParams(new chip::app::AttributePathParams[1]);
    attributePathParams[0].mClusterId              = Test::kMockEndpoint2;
    attributePathParams[0].mClusterId              = Test::MockClusterId(3);
    attributePathParams[0].mAttributeId            = Test::MockAttributeId(1);
    readPrepareParams.mpAttributePathParamsList    = attributePathParams.get();
    readPrepareParams.mAttributePathParamsListSize = 1;

    readPrepareParams.mMinIntervalFloorSeconds   = 0;
    readPrepareParams.mMaxIntervalCeilingSeconds = 1;
    printf("\nSend subscribe request message to Node: %" PRIu64 "\n", chip::kTestDeviceNodeId);

    {
        app::ReadClient readClient(chip::app::InteractionModelEngine::GetInstance(), &ctx.GetExchangeManager(), delegate,
                                   chip::app::ReadClient::InteractionType::Subscribe);

        delegate.mGotReport = false;

        attributePathParams.release();
        err = readClient.SendAutoResubscribeRequest(std::move(readPrepareParams));
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

        ctx.DrainAndServiceIO();

        NL_TEST_ASSERT(apSuite, delegate.mGotReport);

        NL_TEST_ASSERT(apSuite, delegate.mNumAttributeResponse == 1);
        NL_TEST_ASSERT(apSuite, engine->GetNumActiveReadHandlers(ReadHandler::InteractionType::Subscribe) == 1);
        NL_TEST_ASSERT(apSuite, engine->ActiveHandlerAt(0) != nullptr);
        delegate.mpReadHandler = engine->ActiveHandlerAt(0);

        // Set a full overlapped path dirty and expect to receive one E2C3A1
        {
            delegate.mGotReport            = false;
            delegate.mNumAttributeResponse = 0;

            AttributePathParams dirtyPath;
            err = engine->GetReportingEngine().SetDirty(dirtyPath);
            NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

            ctx.DrainAndServiceIO();

            NL_TEST_ASSERT(apSuite, delegate.mGotReport);
            NL_TEST_ASSERT(apSuite, delegate.mNumAttributeResponse == 1);
            NL_TEST_ASSERT(apSuite, delegate.mReceivedAttributePaths[0].mEndpointId == Test::kMockEndpoint2);
            NL_TEST_ASSERT(apSuite, delegate.mReceivedAttributePaths[0].mClusterId == Test::MockClusterId(3));
            NL_TEST_ASSERT(apSuite, delegate.mReceivedAttributePaths[0].mAttributeId == Test::MockAttributeId(1));
        }
    }

    NL_TEST_ASSERT(apSuite, engine->GetNumActiveReadClients() == 0);
    engine->Shutdown();
    NL_TEST_ASSERT(apSuite, ctx.GetExchangeManager().GetNumActiveExchanges() == 0);
}

// Verify that subscription can be shut down just after receiving SUBSCRIBE RESPONSE,
// before receiving any subsequent REPORT DATA.
void TestReadInteraction::TestSubscribeEarlyShutdown(nlTestSuite * apSuite, void * apContext)
{
    TestContext & ctx                  = *static_cast<TestContext *>(apContext);
    Messaging::ReliableMessageMgr * rm = ctx.GetExchangeManager().GetReliableMessageMgr();
    InteractionModelEngine & engine    = *InteractionModelEngine::GetInstance();
    MockInteractionModelApp delegate;

    // Initialize Interaction Model Engine
    NL_TEST_ASSERT(apSuite, rm->TestGetCountRetransTable() == 0);
    NL_TEST_ASSERT(apSuite,
                   engine.Init(&ctx.GetExchangeManager(), &ctx.GetFabricTable(), app::reporting::GetDefaultReportScheduler()) ==
                       CHIP_NO_ERROR);

    // Subscribe to the attribute
    AttributePathParams attributePathParams;
    attributePathParams.mEndpointId  = kTestEndpointId;
    attributePathParams.mClusterId   = kTestClusterId;
    attributePathParams.mAttributeId = 1;

    ReadPrepareParams readPrepareParams(ctx.GetSessionBobToAlice());
    readPrepareParams.mpAttributePathParamsList    = &attributePathParams;
    readPrepareParams.mAttributePathParamsListSize = 1;
    readPrepareParams.mMinIntervalFloorSeconds     = 2;
    readPrepareParams.mMaxIntervalCeilingSeconds   = 5;
    readPrepareParams.mKeepSubscriptions           = false;

    printf("Send subscribe request message to Node: %" PRIu64 "\n", chip::kTestDeviceNodeId);

    {
        app::ReadClient readClient(chip::app::InteractionModelEngine::GetInstance(), &ctx.GetExchangeManager(), delegate,
                                   chip::app::ReadClient::InteractionType::Subscribe);

        NL_TEST_ASSERT(apSuite, readClient.SendRequest(readPrepareParams) == CHIP_NO_ERROR);

        ctx.DrainAndServiceIO();

        NL_TEST_ASSERT(apSuite, delegate.mGotReport);
        NL_TEST_ASSERT(apSuite, delegate.mNumAttributeResponse == 1);
        NL_TEST_ASSERT(apSuite, engine.GetNumActiveReadHandlers(ReadHandler::InteractionType::Subscribe) == 1);
        NL_TEST_ASSERT(apSuite, engine.ActiveHandlerAt(0) != nullptr);
        delegate.mpReadHandler = engine.ActiveHandlerAt(0);
        NL_TEST_ASSERT(apSuite, delegate.mpReadHandler != nullptr);
    }

    // Cleanup
    NL_TEST_ASSERT(apSuite, engine.GetNumActiveReadClients() == 0);
    NL_TEST_ASSERT(apSuite, rm->TestGetCountRetransTable() == 0);
    engine.Shutdown();

    NL_TEST_ASSERT(apSuite, ctx.GetExchangeManager().GetNumActiveExchanges() == 0);
}

void TestReadInteraction::TestSubscribeInvalidAttributePathRoundtrip(nlTestSuite * apSuite, void * apContext)
{
    TestContext & ctx = *static_cast<TestContext *>(apContext);
    CHIP_ERROR err    = CHIP_NO_ERROR;

    Messaging::ReliableMessageMgr * rm = ctx.GetExchangeManager().GetReliableMessageMgr();
    // Shouldn't have anything in the retransmit table when starting the test.
    NL_TEST_ASSERT(apSuite, rm->TestGetCountRetransTable() == 0);

    GenerateEvents(apSuite, apContext);

    MockInteractionModelApp delegate;
    ReportSchedulerImpl * reportScheduler = app::reporting::GetDefaultReportScheduler();
    auto * engine                         = chip::app::InteractionModelEngine::GetInstance();
    err                                   = engine->Init(&ctx.GetExchangeManager(), &ctx.GetFabricTable(), reportScheduler);
    NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
    NL_TEST_ASSERT(apSuite, !delegate.mGotEventResponse);

    ReadPrepareParams readPrepareParams(ctx.GetSessionBobToAlice());
    chip::app::AttributePathParams attributePathParams[1];
    readPrepareParams.mpAttributePathParamsList                 = attributePathParams;
    readPrepareParams.mpAttributePathParamsList[0].mEndpointId  = kTestEndpointId;
    readPrepareParams.mpAttributePathParamsList[0].mClusterId   = kInvalidTestClusterId;
    readPrepareParams.mpAttributePathParamsList[0].mAttributeId = 1;

    readPrepareParams.mAttributePathParamsListSize = 1;

    readPrepareParams.mSessionHolder.Grab(ctx.GetSessionBobToAlice());
    readPrepareParams.mMinIntervalFloorSeconds   = 0;
    readPrepareParams.mMaxIntervalCeilingSeconds = 1;
    printf("\nSend subscribe request message to Node: %" PRIu64 "\n", chip::kTestDeviceNodeId);

    {
        app::ReadClient readClient(chip::app::InteractionModelEngine::GetInstance(), &ctx.GetExchangeManager(), delegate,
                                   chip::app::ReadClient::InteractionType::Subscribe);

        NL_TEST_ASSERT(apSuite, readClient.SendRequest(readPrepareParams) == CHIP_NO_ERROR);

        delegate.mNumAttributeResponse = 0;

        ctx.DrainAndServiceIO();

        NL_TEST_ASSERT(apSuite, delegate.mNumAttributeResponse == 0);

        NL_TEST_ASSERT(apSuite, engine->ActiveHandlerAt(0) != nullptr);
        delegate.mpReadHandler = engine->ActiveHandlerAt(0);

        // Advance monotonic timestamp for min interval to elapse
        gMockClock.AdvanceMonotonic(System::Clock::Seconds16(readPrepareParams.mMaxIntervalCeilingSeconds));
        ctx.GetIOContext().DriveIO();

        NL_TEST_ASSERT(apSuite, engine->GetReportingEngine().IsRunScheduled());
        NL_TEST_ASSERT(apSuite, engine->GetReportingEngine().IsRunScheduled());

        ctx.DrainAndServiceIO();

        NL_TEST_ASSERT(apSuite, delegate.mNumAttributeResponse == 0);
    }

    NL_TEST_ASSERT(apSuite, engine->GetNumActiveReadClients() == 0);
    engine->Shutdown();
    NL_TEST_ASSERT(apSuite, ctx.GetExchangeManager().GetNumActiveExchanges() == 0);
}

void TestReadInteraction::TestReadShutdown(nlTestSuite * apSuite, void * apContext)
{
    auto * engine = chip::app::InteractionModelEngine::GetInstance();
    app::ReadClient * pClients[4];
    TestContext & ctx = *static_cast<TestContext *>(apContext);
    MockInteractionModelApp delegate;

    //
    // Allocate a number of clients
    //
    for (auto & client : pClients)
    {
        client = Platform::New<app::ReadClient>(engine, &ctx.GetExchangeManager(), delegate,
                                                chip::app::ReadClient::InteractionType::Subscribe);
    }

    //
    // Delete every other client to ensure we test out
    // deleting clients from the list of clients tracked by the IM
    //
    Platform::Delete(pClients[1]);
    Platform::Delete(pClients[3]);

    //
    // Shutdown the engine first so that we can
    // de-activate the internal list.
    //
    engine->Shutdown();

    //
    // Shutdown the read clients. These should
    // safely destruct without causing any egregious
    // harm
    //
    Platform::Delete(pClients[0]);
    Platform::Delete(pClients[2]);
}

void TestReadInteraction::TestSubscribeInvalidInterval(nlTestSuite * apSuite, void * apContext)
{
    TestContext & ctx = *static_cast<TestContext *>(apContext);
    CHIP_ERROR err    = CHIP_NO_ERROR;

    Messaging::ReliableMessageMgr * rm = ctx.GetExchangeManager().GetReliableMessageMgr();
    // Shouldn't have anything in the retransmit table when starting the test.
    NL_TEST_ASSERT(apSuite, rm->TestGetCountRetransTable() == 0);

    GenerateEvents(apSuite, apContext);

    MockInteractionModelApp delegate;
    auto * engine = chip::app::InteractionModelEngine::GetInstance();
    err           = engine->Init(&ctx.GetExchangeManager(), &ctx.GetFabricTable(), app::reporting::GetDefaultReportScheduler());
    NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
    NL_TEST_ASSERT(apSuite, !delegate.mGotEventResponse);

    ReadPrepareParams readPrepareParams(ctx.GetSessionBobToAlice());
    chip::app::AttributePathParams attributePathParams[1];
    readPrepareParams.mpAttributePathParamsList                 = attributePathParams;
    readPrepareParams.mpAttributePathParamsList[0].mEndpointId  = kTestEndpointId;
    readPrepareParams.mpAttributePathParamsList[0].mClusterId   = kTestClusterId;
    readPrepareParams.mpAttributePathParamsList[0].mAttributeId = 1;

    readPrepareParams.mAttributePathParamsListSize = 1;

    readPrepareParams.mSessionHolder.Grab(ctx.GetSessionBobToAlice());
    readPrepareParams.mMinIntervalFloorSeconds   = 6;
    readPrepareParams.mMaxIntervalCeilingSeconds = 5;

    {
        app::ReadClient readClient(chip::app::InteractionModelEngine::GetInstance(), &ctx.GetExchangeManager(), delegate,
                                   chip::app::ReadClient::InteractionType::Subscribe);

        NL_TEST_ASSERT(apSuite, readClient.SendRequest(readPrepareParams) == CHIP_ERROR_INVALID_ARGUMENT);

        printf("\nSend subscribe request message to Node: %" PRIu64 "\n", chip::kTestDeviceNodeId);

        ctx.DrainAndServiceIO();
    }

    NL_TEST_ASSERT(apSuite, engine->GetNumActiveReadClients() == 0);

    engine->Shutdown();
    NL_TEST_ASSERT(apSuite, ctx.GetExchangeManager().GetNumActiveExchanges() == 0);
}

void TestReadInteraction::TestPostSubscribeRoundtripStatusReportTimeout(nlTestSuite * apSuite, void * apContext)
{
    TestContext & ctx = *static_cast<TestContext *>(apContext);
    CHIP_ERROR err    = CHIP_NO_ERROR;

    Messaging::ReliableMessageMgr * rm = ctx.GetExchangeManager().GetReliableMessageMgr();
    // Shouldn't have anything in the retransmit table when starting the test.
    NL_TEST_ASSERT(apSuite, rm->TestGetCountRetransTable() == 0);

    MockInteractionModelApp delegate;
    ReportSchedulerImpl * reportScheduler = app::reporting::GetDefaultReportScheduler();
    auto * engine                         = chip::app::InteractionModelEngine::GetInstance();
    err                                   = engine->Init(&ctx.GetExchangeManager(), &ctx.GetFabricTable(), reportScheduler);
    NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
    NL_TEST_ASSERT(apSuite, !delegate.mGotEventResponse);

    ReadPrepareParams readPrepareParams(ctx.GetSessionBobToAlice());
    chip::app::EventPathParams eventPathParams[2];
    readPrepareParams.mpEventPathParamsList                = eventPathParams;
    readPrepareParams.mpEventPathParamsList[0].mEndpointId = kTestEventEndpointId;
    readPrepareParams.mpEventPathParamsList[0].mClusterId  = kTestEventClusterId;
    readPrepareParams.mpEventPathParamsList[0].mEventId    = kTestEventIdDebug;

    readPrepareParams.mpEventPathParamsList[1].mEndpointId = kTestEventEndpointId;
    readPrepareParams.mpEventPathParamsList[1].mClusterId  = kTestEventClusterId;
    readPrepareParams.mpEventPathParamsList[1].mEventId    = kTestEventIdCritical;

    readPrepareParams.mEventPathParamsListSize = 2;

    chip::app::AttributePathParams attributePathParams[2];
    readPrepareParams.mpAttributePathParamsList                 = attributePathParams;
    readPrepareParams.mpAttributePathParamsList[0].mEndpointId  = kTestEndpointId;
    readPrepareParams.mpAttributePathParamsList[0].mClusterId   = kTestClusterId;
    readPrepareParams.mpAttributePathParamsList[0].mAttributeId = 1;

    readPrepareParams.mpAttributePathParamsList[1].mEndpointId  = kTestEndpointId;
    readPrepareParams.mpAttributePathParamsList[1].mClusterId   = kTestClusterId;
    readPrepareParams.mpAttributePathParamsList[1].mAttributeId = 2;

    readPrepareParams.mAttributePathParamsListSize = 2;

    readPrepareParams.mMinIntervalFloorSeconds   = 0;
    readPrepareParams.mMaxIntervalCeilingSeconds = 1;

    delegate.mNumAttributeResponse       = 0;
    readPrepareParams.mKeepSubscriptions = false;

    {
        app::ReadClient readClient(chip::app::InteractionModelEngine::GetInstance(), &ctx.GetExchangeManager(), delegate,
                                   chip::app::ReadClient::InteractionType::Subscribe);
        printf("\nSend first subscribe request message to Node: %" PRIu64 "\n", chip::kTestDeviceNodeId);
        delegate.mGotReport = false;
        err                 = readClient.SendRequest(readPrepareParams);
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

        ctx.DrainAndServiceIO();

        NL_TEST_ASSERT(apSuite, engine->GetNumActiveReadHandlers() == 1);
        NL_TEST_ASSERT(apSuite, engine->ActiveHandlerAt(0) != nullptr);
        delegate.mpReadHandler = engine->ActiveHandlerAt(0);

        NL_TEST_ASSERT(apSuite, delegate.mGotEventResponse);
        NL_TEST_ASSERT(apSuite, delegate.mGotReport);
        NL_TEST_ASSERT(apSuite, delegate.mNumAttributeResponse == 2);
        NL_TEST_ASSERT(apSuite, engine->GetNumActiveReadHandlers(ReadHandler::InteractionType::Subscribe) == 1);

        GenerateEvents(apSuite, apContext);
        chip::app::AttributePathParams dirtyPath1;
        dirtyPath1.mClusterId   = kTestClusterId;
        dirtyPath1.mEndpointId  = kTestEndpointId;
        dirtyPath1.mAttributeId = 1;

        chip::app::AttributePathParams dirtyPath2;
        dirtyPath2.mClusterId   = kTestClusterId;
        dirtyPath2.mEndpointId  = kTestEndpointId;
        dirtyPath2.mAttributeId = 2;

        // Test report with 2 different path
        delegate.mGotReport            = false;
        delegate.mNumAttributeResponse = 0;

        err = engine->GetReportingEngine().SetDirty(dirtyPath1);
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
        err = engine->GetReportingEngine().SetDirty(dirtyPath2);
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

        ctx.DrainAndServiceIO();

        NL_TEST_ASSERT(apSuite, delegate.mGotReport);
        NL_TEST_ASSERT(apSuite, delegate.mNumAttributeResponse == 2);

        // Wait for max interval to elapse
        gMockClock.AdvanceMonotonic(System::Clock::Seconds16(readPrepareParams.mMaxIntervalCeilingSeconds));
        ctx.GetIOContext().DriveIO();

        delegate.mGotReport            = false;
        delegate.mNumAttributeResponse = 0;
        ctx.ExpireSessionBobToAlice();

        err = engine->GetReportingEngine().SetDirty(dirtyPath1);
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
        err = engine->GetReportingEngine().SetDirty(dirtyPath2);
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
        NL_TEST_ASSERT(apSuite, engine->GetReportingEngine().IsRunScheduled());

        ctx.DrainAndServiceIO();

        ctx.ExpireSessionAliceToBob();
        NL_TEST_ASSERT(apSuite, engine->GetReportingEngine().GetNumReportsInFlight() == 0);
        NL_TEST_ASSERT(apSuite, delegate.mNumAttributeResponse == 0);
    }

    // By now we should have closed all exchanges and sent all pending acks, so
    // there should be no queued-up things in the retransmit table.
    NL_TEST_ASSERT(apSuite, rm->TestGetCountRetransTable() == 0);

    NL_TEST_ASSERT(apSuite, engine->GetNumActiveReadClients() == 0);
    engine->Shutdown();
    NL_TEST_ASSERT(apSuite, ctx.GetExchangeManager().GetNumActiveExchanges() == 0);
    ctx.CreateSessionAliceToBob();
    ctx.CreateSessionBobToAlice();
}

void TestReadInteraction::TestSubscribeRoundtripStatusReportTimeout(nlTestSuite * apSuite, void * apContext)
{
    TestContext & ctx = *static_cast<TestContext *>(apContext);
    CHIP_ERROR err    = CHIP_NO_ERROR;

    Messaging::ReliableMessageMgr * rm = ctx.GetExchangeManager().GetReliableMessageMgr();
    // Shouldn't have anything in the retransmit table when starting the test.
    NL_TEST_ASSERT(apSuite, rm->TestGetCountRetransTable() == 0);

    MockInteractionModelApp delegate;
    auto * engine = chip::app::InteractionModelEngine::GetInstance();
    err           = engine->Init(&ctx.GetExchangeManager(), &ctx.GetFabricTable(), app::reporting::GetDefaultReportScheduler());
    NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
    NL_TEST_ASSERT(apSuite, !delegate.mGotEventResponse);

    ReadPrepareParams readPrepareParams(ctx.GetSessionBobToAlice());
    chip::app::EventPathParams eventPathParams[2];
    readPrepareParams.mpEventPathParamsList                = eventPathParams;
    readPrepareParams.mpEventPathParamsList[0].mEndpointId = kTestEventEndpointId;
    readPrepareParams.mpEventPathParamsList[0].mClusterId  = kTestEventClusterId;
    readPrepareParams.mpEventPathParamsList[0].mEventId    = kTestEventIdDebug;

    readPrepareParams.mpEventPathParamsList[1].mEndpointId = kTestEventEndpointId;
    readPrepareParams.mpEventPathParamsList[1].mClusterId  = kTestEventClusterId;
    readPrepareParams.mpEventPathParamsList[1].mEventId    = kTestEventIdCritical;

    readPrepareParams.mEventPathParamsListSize = 2;

    chip::app::AttributePathParams attributePathParams[2];
    readPrepareParams.mpAttributePathParamsList                 = attributePathParams;
    readPrepareParams.mpAttributePathParamsList[0].mEndpointId  = kTestEndpointId;
    readPrepareParams.mpAttributePathParamsList[0].mClusterId   = kTestClusterId;
    readPrepareParams.mpAttributePathParamsList[0].mAttributeId = 1;

    readPrepareParams.mpAttributePathParamsList[1].mEndpointId  = kTestEndpointId;
    readPrepareParams.mpAttributePathParamsList[1].mClusterId   = kTestClusterId;
    readPrepareParams.mpAttributePathParamsList[1].mAttributeId = 2;

    readPrepareParams.mAttributePathParamsListSize = 2;

    readPrepareParams.mMinIntervalFloorSeconds   = 2;
    readPrepareParams.mMaxIntervalCeilingSeconds = 5;

    delegate.mNumAttributeResponse       = 0;
    readPrepareParams.mKeepSubscriptions = false;

    {
        app::ReadClient readClient(chip::app::InteractionModelEngine::GetInstance(), &ctx.GetExchangeManager(), delegate,
                                   chip::app::ReadClient::InteractionType::Subscribe);
        printf("\nSend first subscribe request message to Node: %" PRIu64 "\n", chip::kTestDeviceNodeId);
        delegate.mGotReport = false;
        err                 = readClient.SendRequest(readPrepareParams);
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

        ctx.ExpireSessionAliceToBob();

        ctx.DrainAndServiceIO();

        ctx.ExpireSessionBobToAlice();

        NL_TEST_ASSERT(apSuite, engine->GetNumActiveReadHandlers() == 0);
        NL_TEST_ASSERT(apSuite, engine->GetReportingEngine().GetNumReportsInFlight() == 0);
        NL_TEST_ASSERT(apSuite, delegate.mNumAttributeResponse == 0);
    }

    // By now we should have closed all exchanges and sent all pending acks, so
    // there should be no queued-up things in the retransmit table.
    NL_TEST_ASSERT(apSuite, rm->TestGetCountRetransTable() == 0);

    NL_TEST_ASSERT(apSuite, engine->GetNumActiveReadClients() == 0);
    engine->Shutdown();
    NL_TEST_ASSERT(apSuite, ctx.GetExchangeManager().GetNumActiveExchanges() == 0);
    ctx.CreateSessionAliceToBob();
    ctx.CreateSessionBobToAlice();
}

void TestReadInteraction::TestReadChunkingStatusReportTimeout(nlTestSuite * apSuite, void * apContext)
{
    TestContext & ctx = *static_cast<TestContext *>(apContext);
    CHIP_ERROR err    = CHIP_NO_ERROR;

    Messaging::ReliableMessageMgr * rm = ctx.GetExchangeManager().GetReliableMessageMgr();
    // Shouldn't have anything in the retransmit table when starting the test.
    NL_TEST_ASSERT(apSuite, rm->TestGetCountRetransTable() == 0);

    GenerateEvents(apSuite, apContext);

    MockInteractionModelApp delegate;
    auto * engine = chip::app::InteractionModelEngine::GetInstance();
    err           = engine->Init(&ctx.GetExchangeManager(), &ctx.GetFabricTable(), app::reporting::GetDefaultReportScheduler());
    NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
    NL_TEST_ASSERT(apSuite, !delegate.mGotEventResponse);

    chip::app::AttributePathParams attributePathParams[1];
    // Mock Attribute 4 is a big attribute, with 6 large OCTET_STRING
    attributePathParams[0].mEndpointId  = Test::kMockEndpoint3;
    attributePathParams[0].mClusterId   = Test::MockClusterId(2);
    attributePathParams[0].mAttributeId = Test::MockAttributeId(4);

    ReadPrepareParams readPrepareParams(ctx.GetSessionBobToAlice());
    readPrepareParams.mpEventPathParamsList        = nullptr;
    readPrepareParams.mEventPathParamsListSize     = 0;
    readPrepareParams.mpAttributePathParamsList    = attributePathParams;
    readPrepareParams.mAttributePathParamsListSize = 1;

    {
        app::ReadClient readClient(chip::app::InteractionModelEngine::GetInstance(), &ctx.GetExchangeManager(), delegate,
                                   chip::app::ReadClient::InteractionType::Read);

        err = readClient.SendRequest(readPrepareParams);
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

        ctx.ExpireSessionAliceToBob();
        ctx.DrainAndServiceIO();
        ctx.ExpireSessionBobToAlice();

        NL_TEST_ASSERT(apSuite, engine->GetReportingEngine().GetNumReportsInFlight() == 0);
        // By now we should have closed all exchanges and sent all pending acks, so
        // there should be no queued-up things in the retransmit table.
        NL_TEST_ASSERT(apSuite, rm->TestGetCountRetransTable() == 0);
    }

    NL_TEST_ASSERT(apSuite, engine->GetNumActiveReadClients() == 0);
    engine->Shutdown();
    NL_TEST_ASSERT(apSuite, ctx.GetExchangeManager().GetNumActiveExchanges() == 0);
    ctx.CreateSessionAliceToBob();
    ctx.CreateSessionBobToAlice();
}

// ReadClient sends the read request, but handler fails to send the one report (SendMessage returns an error).
// Since this is an un-chunked read, we are not in the AwaitingReportResponse state, so the "reports in flight"
// counter should not increase.
void TestReadInteraction::TestReadReportFailure(nlTestSuite * apSuite, void * apContext)
{
    TestContext & ctx = *static_cast<TestContext *>(apContext);
    CHIP_ERROR err    = CHIP_NO_ERROR;

    Messaging::ReliableMessageMgr * rm = ctx.GetExchangeManager().GetReliableMessageMgr();
    // Shouldn't have anything in the retransmit table when starting the test.
    NL_TEST_ASSERT(apSuite, rm->TestGetCountRetransTable() == 0);

    MockInteractionModelApp delegate;
    auto * engine = chip::app::InteractionModelEngine::GetInstance();
    err           = engine->Init(&ctx.GetExchangeManager(), &ctx.GetFabricTable(), app::reporting::GetDefaultReportScheduler());
    NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
    NL_TEST_ASSERT(apSuite, !delegate.mGotEventResponse);

    chip::app::AttributePathParams attributePathParams[1];
    attributePathParams[0].mEndpointId  = Test::kMockEndpoint2;
    attributePathParams[0].mClusterId   = Test::MockClusterId(3);
    attributePathParams[0].mAttributeId = Test::MockAttributeId(1);

    ReadPrepareParams readPrepareParams(ctx.GetSessionBobToAlice());
    readPrepareParams.mpEventPathParamsList        = nullptr;
    readPrepareParams.mEventPathParamsListSize     = 0;
    readPrepareParams.mpAttributePathParamsList    = attributePathParams;
    readPrepareParams.mAttributePathParamsListSize = 1;

    {
        app::ReadClient readClient(chip::app::InteractionModelEngine::GetInstance(), &ctx.GetExchangeManager(), delegate,
                                   chip::app::ReadClient::InteractionType::Read);

        ctx.GetLoopback().mNumMessagesToAllowBeforeError = 1;
        ctx.GetLoopback().mMessageSendError              = CHIP_ERROR_INCORRECT_STATE;
        err                                              = readClient.SendRequest(readPrepareParams);
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

        ctx.DrainAndServiceIO();
        NL_TEST_ASSERT(apSuite, engine->GetReportingEngine().GetNumReportsInFlight() == 0);
        NL_TEST_ASSERT(apSuite, engine->GetNumActiveReadHandlers() == 0);

        ctx.GetLoopback().mNumMessagesToAllowBeforeError = 0;
        ctx.GetLoopback().mMessageSendError              = CHIP_NO_ERROR;
    }

    NL_TEST_ASSERT(apSuite, engine->GetNumActiveReadClients() == 0);
    engine->Shutdown();
    NL_TEST_ASSERT(apSuite, ctx.GetExchangeManager().GetNumActiveExchanges() == 0);
}

void TestReadInteraction::TestSubscribeRoundtripChunkStatusReportTimeout(nlTestSuite * apSuite, void * apContext)
{
    TestContext & ctx = *static_cast<TestContext *>(apContext);
    CHIP_ERROR err    = CHIP_NO_ERROR;

    Messaging::ReliableMessageMgr * rm = ctx.GetExchangeManager().GetReliableMessageMgr();
    // Shouldn't have anything in the retransmit table when starting the test.
    NL_TEST_ASSERT(apSuite, rm->TestGetCountRetransTable() == 0);

    MockInteractionModelApp delegate;
    auto * engine = chip::app::InteractionModelEngine::GetInstance();
    err           = engine->Init(&ctx.GetExchangeManager(), &ctx.GetFabricTable(), app::reporting::GetDefaultReportScheduler());
    NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
    NL_TEST_ASSERT(apSuite, !delegate.mGotEventResponse);

    ReadPrepareParams readPrepareParams(ctx.GetSessionBobToAlice());
    chip::app::EventPathParams eventPathParams[2];
    readPrepareParams.mpEventPathParamsList                = eventPathParams;
    readPrepareParams.mpEventPathParamsList[0].mEndpointId = kTestEventEndpointId;
    readPrepareParams.mpEventPathParamsList[0].mClusterId  = kTestEventClusterId;
    readPrepareParams.mpEventPathParamsList[0].mEventId    = kTestEventIdDebug;

    readPrepareParams.mpEventPathParamsList[1].mEndpointId = kTestEventEndpointId;
    readPrepareParams.mpEventPathParamsList[1].mClusterId  = kTestEventClusterId;
    readPrepareParams.mpEventPathParamsList[1].mEventId    = kTestEventIdCritical;

    readPrepareParams.mEventPathParamsListSize = 2;

    chip::app::AttributePathParams attributePathParams[1];
    // Mock Attribute 4 is a big attribute, with 6 large OCTET_STRING
    attributePathParams[0].mEndpointId  = Test::kMockEndpoint3;
    attributePathParams[0].mClusterId   = Test::MockClusterId(2);
    attributePathParams[0].mAttributeId = Test::MockAttributeId(4);

    readPrepareParams.mpAttributePathParamsList    = attributePathParams;
    readPrepareParams.mAttributePathParamsListSize = 1;

    readPrepareParams.mMinIntervalFloorSeconds   = 2;
    readPrepareParams.mMaxIntervalCeilingSeconds = 5;

    delegate.mNumAttributeResponse       = 0;
    readPrepareParams.mKeepSubscriptions = false;

    {
        app::ReadClient readClient(chip::app::InteractionModelEngine::GetInstance(), &ctx.GetExchangeManager(), delegate,
                                   chip::app::ReadClient::InteractionType::Subscribe);
        printf("\nSend first subscribe request message to Node: %" PRIu64 "\n", chip::kTestDeviceNodeId);
        delegate.mGotReport = false;
        err                 = readClient.SendRequest(readPrepareParams);
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

        ctx.ExpireSessionAliceToBob();
        ctx.DrainAndServiceIO();
        ctx.ExpireSessionBobToAlice();

        NL_TEST_ASSERT(apSuite, engine->GetNumActiveReadHandlers() == 0);
        NL_TEST_ASSERT(apSuite, engine->GetReportingEngine().GetNumReportsInFlight() == 0);
        NL_TEST_ASSERT(apSuite, delegate.mNumAttributeResponse == 0);
    }

    // By now we should have closed all exchanges and sent all pending acks, so
    // there should be no queued-up things in the retransmit table.
    NL_TEST_ASSERT(apSuite, rm->TestGetCountRetransTable() == 0);

    NL_TEST_ASSERT(apSuite, engine->GetNumActiveReadClients() == 0);
    engine->Shutdown();
    NL_TEST_ASSERT(apSuite, ctx.GetExchangeManager().GetNumActiveExchanges() == 0);
    ctx.CreateSessionAliceToBob();
    ctx.CreateSessionBobToAlice();
}

void TestReadInteraction::TestPostSubscribeRoundtripChunkStatusReportTimeout(nlTestSuite * apSuite, void * apContext)
{
    TestContext & ctx = *static_cast<TestContext *>(apContext);
    CHIP_ERROR err    = CHIP_NO_ERROR;

    Messaging::ReliableMessageMgr * rm = ctx.GetExchangeManager().GetReliableMessageMgr();
    // Shouldn't have anything in the retransmit table when starting the test.
    NL_TEST_ASSERT(apSuite, rm->TestGetCountRetransTable() == 0);

    MockInteractionModelApp delegate;
    ReportSchedulerImpl * reportScheduler = app::reporting::GetDefaultReportScheduler();
    auto * engine                         = chip::app::InteractionModelEngine::GetInstance();
    err                                   = engine->Init(&ctx.GetExchangeManager(), &ctx.GetFabricTable(), reportScheduler);
    NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
    NL_TEST_ASSERT(apSuite, !delegate.mGotEventResponse);

    ReadPrepareParams readPrepareParams(ctx.GetSessionBobToAlice());
    chip::app::EventPathParams eventPathParams[2];
    readPrepareParams.mpEventPathParamsList                = eventPathParams;
    readPrepareParams.mpEventPathParamsList[0].mEndpointId = kTestEventEndpointId;
    readPrepareParams.mpEventPathParamsList[0].mClusterId  = kTestEventClusterId;
    readPrepareParams.mpEventPathParamsList[0].mEventId    = kTestEventIdDebug;

    readPrepareParams.mpEventPathParamsList[1].mEndpointId = kTestEventEndpointId;
    readPrepareParams.mpEventPathParamsList[1].mClusterId  = kTestEventClusterId;
    readPrepareParams.mpEventPathParamsList[1].mEventId    = kTestEventIdCritical;

    readPrepareParams.mEventPathParamsListSize = 2;

    chip::app::AttributePathParams attributePathParams[1];
    // Mock Attribute 4 is a big attribute, with 6 large OCTET_STRING
    attributePathParams[0].mEndpointId  = Test::kMockEndpoint3;
    attributePathParams[0].mClusterId   = Test::MockClusterId(2);
    attributePathParams[0].mAttributeId = Test::MockAttributeId(4);

    readPrepareParams.mpAttributePathParamsList    = attributePathParams;
    readPrepareParams.mAttributePathParamsListSize = 1;

    readPrepareParams.mMinIntervalFloorSeconds   = 0;
    readPrepareParams.mMaxIntervalCeilingSeconds = 1;

    delegate.mNumAttributeResponse       = 0;
    readPrepareParams.mKeepSubscriptions = false;

    {
        app::ReadClient readClient(chip::app::InteractionModelEngine::GetInstance(), &ctx.GetExchangeManager(), delegate,
                                   chip::app::ReadClient::InteractionType::Subscribe);
        printf("\nSend first subscribe request message to Node: %" PRIu64 "\n", chip::kTestDeviceNodeId);
        delegate.mGotReport = false;
        err                 = readClient.SendRequest(readPrepareParams);
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

        ctx.DrainAndServiceIO();

        NL_TEST_ASSERT(apSuite, engine->GetNumActiveReadHandlers() == 1);
        NL_TEST_ASSERT(apSuite, engine->ActiveHandlerAt(0) != nullptr);
        delegate.mpReadHandler = engine->ActiveHandlerAt(0);

        NL_TEST_ASSERT(apSuite, delegate.mGotEventResponse);
        NL_TEST_ASSERT(apSuite, delegate.mGotReport);
        NL_TEST_ASSERT(apSuite, engine->GetNumActiveReadHandlers(ReadHandler::InteractionType::Subscribe) == 1);

        GenerateEvents(apSuite, apContext);
        chip::app::AttributePathParams dirtyPath1;
        dirtyPath1.mClusterId   = Test::MockClusterId(2);
        dirtyPath1.mEndpointId  = Test::kMockEndpoint3;
        dirtyPath1.mAttributeId = Test::MockAttributeId(4);

        gMockClock.AdvanceMonotonic(System::Clock::Seconds16(readPrepareParams.mMaxIntervalCeilingSeconds));
        ctx.GetIOContext().DriveIO();

        err = engine->GetReportingEngine().SetDirty(dirtyPath1);
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
        delegate.mGotReport            = false;
        delegate.mNumAttributeResponse = 0;

        ctx.GetLoopback().mSentMessageCount                 = 0;
        ctx.GetLoopback().mNumMessagesToDrop                = 1;
        ctx.GetLoopback().mNumMessagesToAllowBeforeDropping = 1;
        ctx.GetLoopback().mDroppedMessageCount              = 0;

        ctx.DrainAndServiceIO();
        // Drop status report for the first chunked report, then expire session, handler would be timeout
        NL_TEST_ASSERT(apSuite, engine->GetReportingEngine().GetNumReportsInFlight() == 1);
        NL_TEST_ASSERT(apSuite, ctx.GetLoopback().mSentMessageCount == 2);
        NL_TEST_ASSERT(apSuite, ctx.GetLoopback().mDroppedMessageCount == 1);
        NL_TEST_ASSERT(apSuite, engine->GetNumActiveReadHandlers() == 1);

        ctx.ExpireSessionAliceToBob();
        ctx.ExpireSessionBobToAlice();
        NL_TEST_ASSERT(apSuite, engine->GetNumActiveReadHandlers() == 0);
        ctx.GetLoopback().mSentMessageCount                 = 0;
        ctx.GetLoopback().mNumMessagesToDrop                = 0;
        ctx.GetLoopback().mNumMessagesToAllowBeforeDropping = 0;
        ctx.GetLoopback().mDroppedMessageCount              = 0;
    }

    NL_TEST_ASSERT(apSuite, engine->GetNumActiveReadClients() == 0);
    engine->Shutdown();
    NL_TEST_ASSERT(apSuite, ctx.GetExchangeManager().GetNumActiveExchanges() == 0);
    ctx.CreateSessionAliceToBob();
    ctx.CreateSessionBobToAlice();
}

void TestReadInteraction::TestPostSubscribeRoundtripChunkReportTimeout(nlTestSuite * apSuite, void * apContext)
{
    TestContext & ctx = *static_cast<TestContext *>(apContext);
    CHIP_ERROR err    = CHIP_NO_ERROR;

    Messaging::ReliableMessageMgr * rm = ctx.GetExchangeManager().GetReliableMessageMgr();
    // Shouldn't have anything in the retransmit table when starting the test.
    NL_TEST_ASSERT(apSuite, rm->TestGetCountRetransTable() == 0);

    MockInteractionModelApp delegate;
    ReportSchedulerImpl * reportScheduler = app::reporting::GetDefaultReportScheduler();
    auto * engine                         = chip::app::InteractionModelEngine::GetInstance();
    err                                   = engine->Init(&ctx.GetExchangeManager(), &ctx.GetFabricTable(), reportScheduler);
    NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
    NL_TEST_ASSERT(apSuite, !delegate.mGotEventResponse);

    ReadPrepareParams readPrepareParams(ctx.GetSessionBobToAlice());
    chip::app::EventPathParams eventPathParams[2];
    readPrepareParams.mpEventPathParamsList                = eventPathParams;
    readPrepareParams.mpEventPathParamsList[0].mEndpointId = kTestEventEndpointId;
    readPrepareParams.mpEventPathParamsList[0].mClusterId  = kTestEventClusterId;
    readPrepareParams.mpEventPathParamsList[0].mEventId    = kTestEventIdDebug;

    readPrepareParams.mpEventPathParamsList[1].mEndpointId = kTestEventEndpointId;
    readPrepareParams.mpEventPathParamsList[1].mClusterId  = kTestEventClusterId;
    readPrepareParams.mpEventPathParamsList[1].mEventId    = kTestEventIdCritical;

    readPrepareParams.mEventPathParamsListSize = 2;

    chip::app::AttributePathParams attributePathParams[1];
    // Mock Attribute 4 is a big attribute, with 6 large OCTET_STRING
    attributePathParams[0].mEndpointId  = Test::kMockEndpoint3;
    attributePathParams[0].mClusterId   = Test::MockClusterId(2);
    attributePathParams[0].mAttributeId = Test::MockAttributeId(4);

    readPrepareParams.mpAttributePathParamsList    = attributePathParams;
    readPrepareParams.mAttributePathParamsListSize = 1;

    readPrepareParams.mMinIntervalFloorSeconds   = 0;
    readPrepareParams.mMaxIntervalCeilingSeconds = 1;

    delegate.mNumAttributeResponse       = 0;
    readPrepareParams.mKeepSubscriptions = false;

    {
        app::ReadClient readClient(chip::app::InteractionModelEngine::GetInstance(), &ctx.GetExchangeManager(), delegate,
                                   chip::app::ReadClient::InteractionType::Subscribe);
        printf("\nSend first subscribe request message to Node: %" PRIu64 "\n", chip::kTestDeviceNodeId);
        delegate.mGotReport = false;
        err                 = readClient.SendRequest(readPrepareParams);
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

        ctx.DrainAndServiceIO();

        NL_TEST_ASSERT(apSuite, engine->GetNumActiveReadHandlers() == 1);
        NL_TEST_ASSERT(apSuite, engine->ActiveHandlerAt(0) != nullptr);
        delegate.mpReadHandler = engine->ActiveHandlerAt(0);

        NL_TEST_ASSERT(apSuite, delegate.mGotEventResponse);
        NL_TEST_ASSERT(apSuite, delegate.mGotReport);
        NL_TEST_ASSERT(apSuite, engine->GetNumActiveReadHandlers(ReadHandler::InteractionType::Subscribe) == 1);

        GenerateEvents(apSuite, apContext);
        chip::app::AttributePathParams dirtyPath1;
        dirtyPath1.mClusterId   = Test::MockClusterId(2);
        dirtyPath1.mEndpointId  = Test::kMockEndpoint3;
        dirtyPath1.mAttributeId = Test::MockAttributeId(4);

        gMockClock.AdvanceMonotonic(System::Clock::Seconds16(readPrepareParams.mMaxIntervalCeilingSeconds));
        ctx.GetIOContext().DriveIO();

        err = engine->GetReportingEngine().SetDirty(dirtyPath1);
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
        delegate.mGotReport            = false;
        delegate.mNumAttributeResponse = 0;

        // Drop second chunked report then expire session, client would be timeout
        ctx.GetLoopback().mSentMessageCount                 = 0;
        ctx.GetLoopback().mNumMessagesToDrop                = 1;
        ctx.GetLoopback().mNumMessagesToAllowBeforeDropping = 2;
        ctx.GetLoopback().mDroppedMessageCount              = 0;

        ctx.DrainAndServiceIO();
        NL_TEST_ASSERT(apSuite, engine->GetReportingEngine().GetNumReportsInFlight() == 1);
        NL_TEST_ASSERT(apSuite, ctx.GetLoopback().mSentMessageCount == 3);
        NL_TEST_ASSERT(apSuite, ctx.GetLoopback().mDroppedMessageCount == 1);

        ctx.ExpireSessionAliceToBob();
        ctx.ExpireSessionBobToAlice();
        NL_TEST_ASSERT(apSuite, delegate.mError == CHIP_ERROR_TIMEOUT);

        ctx.GetLoopback().mSentMessageCount                 = 0;
        ctx.GetLoopback().mNumMessagesToDrop                = 0;
        ctx.GetLoopback().mNumMessagesToAllowBeforeDropping = 0;
        ctx.GetLoopback().mDroppedMessageCount              = 0;
    }

    NL_TEST_ASSERT(apSuite, engine->GetNumActiveReadClients() == 0);
    engine->Shutdown();
    ctx.CreateSessionAliceToBob();
    ctx.CreateSessionBobToAlice();
}

void TestReadInteraction::TestPostSubscribeRoundtripChunkReport(nlTestSuite * apSuite, void * apContext)
{
    TestContext & ctx = *static_cast<TestContext *>(apContext);
    CHIP_ERROR err    = CHIP_NO_ERROR;

    Messaging::ReliableMessageMgr * rm = ctx.GetExchangeManager().GetReliableMessageMgr();
    // Shouldn't have anything in the retransmit table when starting the test.
    NL_TEST_ASSERT(apSuite, rm->TestGetCountRetransTable() == 0);

    MockInteractionModelApp delegate;
    auto * engine = chip::app::InteractionModelEngine::GetInstance();
    err           = engine->Init(&ctx.GetExchangeManager(), &ctx.GetFabricTable(), app::reporting::GetDefaultReportScheduler());
    NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
    NL_TEST_ASSERT(apSuite, !delegate.mGotEventResponse);

    ReadPrepareParams readPrepareParams(ctx.GetSessionBobToAlice());
    chip::app::EventPathParams eventPathParams[2];
    readPrepareParams.mpEventPathParamsList                = eventPathParams;
    readPrepareParams.mpEventPathParamsList[0].mEndpointId = kTestEventEndpointId;
    readPrepareParams.mpEventPathParamsList[0].mClusterId  = kTestEventClusterId;
    readPrepareParams.mpEventPathParamsList[0].mEventId    = kTestEventIdDebug;

    readPrepareParams.mpEventPathParamsList[1].mEndpointId = kTestEventEndpointId;
    readPrepareParams.mpEventPathParamsList[1].mClusterId  = kTestEventClusterId;
    readPrepareParams.mpEventPathParamsList[1].mEventId    = kTestEventIdCritical;

    readPrepareParams.mEventPathParamsListSize = 2;

    chip::app::AttributePathParams attributePathParams[1];
    // Mock Attribute 4 is a big attribute, with 6 large OCTET_STRING
    attributePathParams[0].mEndpointId  = Test::kMockEndpoint3;
    attributePathParams[0].mClusterId   = Test::MockClusterId(2);
    attributePathParams[0].mAttributeId = Test::MockAttributeId(4);

    readPrepareParams.mpAttributePathParamsList    = attributePathParams;
    readPrepareParams.mAttributePathParamsListSize = 1;

    readPrepareParams.mMinIntervalFloorSeconds   = 1;
    readPrepareParams.mMaxIntervalCeilingSeconds = 5;

    delegate.mNumAttributeResponse       = 0;
    readPrepareParams.mKeepSubscriptions = false;

    {
        app::ReadClient readClient(chip::app::InteractionModelEngine::GetInstance(), &ctx.GetExchangeManager(), delegate,
                                   chip::app::ReadClient::InteractionType::Subscribe);
        printf("\nSend first subscribe request message to Node: %" PRIu64 "\n", chip::kTestDeviceNodeId);
        delegate.mGotReport = false;
        err                 = readClient.SendRequest(readPrepareParams);
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

        ctx.DrainAndServiceIO();

        NL_TEST_ASSERT(apSuite, engine->GetNumActiveReadHandlers() == 1);
        NL_TEST_ASSERT(apSuite, engine->ActiveHandlerAt(0) != nullptr);
        delegate.mpReadHandler = engine->ActiveHandlerAt(0);

        NL_TEST_ASSERT(apSuite, delegate.mGotEventResponse);
        NL_TEST_ASSERT(apSuite, delegate.mGotReport);
        NL_TEST_ASSERT(apSuite, engine->GetNumActiveReadHandlers(ReadHandler::InteractionType::Subscribe) == 1);

        GenerateEvents(apSuite, apContext);
        chip::app::AttributePathParams dirtyPath1;
        dirtyPath1.mClusterId   = Test::MockClusterId(2);
        dirtyPath1.mEndpointId  = Test::kMockEndpoint3;
        dirtyPath1.mAttributeId = Test::MockAttributeId(4);

        err                            = engine->GetReportingEngine().SetDirty(dirtyPath1);
        delegate.mGotReport            = false;
        delegate.mNumAttributeResponse = 0;
        delegate.mNumArrayItems        = 0;

        // wait for min interval 1 seconds(in test, we use 0.9second considering the time variation), expect no event is received,
        // then wait for 0.5 seconds, then all chunked dirty reports are sent out, which would not honor minInterval
        gMockClock.AdvanceMonotonic(System::Clock::Milliseconds32(900));
        ctx.GetIOContext().DriveIO();

        NL_TEST_ASSERT(apSuite, delegate.mNumAttributeResponse == 0);
        System::Clock::Timestamp startTime = gMockClock.GetMonotonicTimestamp();

        // Increment in time is done by steps here to allow for multiple IO processing at the right time and allow the timer to be
        // rescheduled accordingly
        while (true)
        {
            ctx.GetIOContext().DriveIO();
            if ((gMockClock.GetMonotonicTimestamp() - startTime) >= System::Clock::Milliseconds32(500))
            {
                break;
            }
            gMockClock.AdvanceMonotonic(System::Clock::Milliseconds32(10));
        }
    }
    // We get one chunk with 4 array elements, and then one chunk per
    // element, and the total size of the array is
    // kMockAttribute4ListLength.
    NL_TEST_ASSERT(apSuite, delegate.mNumAttributeResponse == 1 + (kMockAttribute4ListLength - 4));
    NL_TEST_ASSERT(apSuite, delegate.mNumArrayItems == 6);

    NL_TEST_ASSERT(apSuite, engine->GetNumActiveReadClients() == 0);
    engine->Shutdown();
}

namespace {

void CheckForInvalidAction(nlTestSuite * apSuite, Test::MessageCapturer & messageLog)
{
    NL_TEST_ASSERT(apSuite, messageLog.MessageCount() == 1);
    NL_TEST_ASSERT(apSuite, messageLog.IsMessageType(0, Protocols::InteractionModel::MsgType::StatusResponse));
    CHIP_ERROR status;
    NL_TEST_ASSERT(apSuite,
                   StatusResponse::ProcessStatusResponse(std::move(messageLog.MessagePayload(0)), status) == CHIP_NO_ERROR);
    NL_TEST_ASSERT(apSuite, status == CHIP_IM_GLOBAL_STATUS(InvalidAction));
}

} // anonymous namespace

/**
 * Helper macro we can use to pretend we got a reply from the server in cases
 * when the reply was actually dropped due to us not wanting the client's state
 * machine to advance.
 *
 * When this macro is used, the client has sent a message and is waiting for an
 * ack+response, and the server has sent a response that got dropped and is
 * waiting for an ack (and maybe a response).
 *
 * What this macro then needs to do is:
 *
 * 1. Pretend that the client got an ack (and clear out the corresponding ack
 *    state).
 * 2. Pretend that the client got a message from the server, with the id of the
 *    message that was dropped, which requires an ack, so the client will send
 *    that ack in its next message.
 *
 * This is a macro so we get useful line numbers on assertion failures
 */
#define PretendWeGotReplyFromServer(aSuite, aContext, aClientExchange)                                                             \
    {                                                                                                                              \
        Messaging::ReliableMessageMgr * localRm    = (aContext).GetExchangeManager().GetReliableMessageMgr();                      \
        Messaging::ExchangeContext * localExchange = aClientExchange;                                                              \
        NL_TEST_ASSERT(aSuite, localRm->TestGetCountRetransTable() == 2);                                                          \
                                                                                                                                   \
        localRm->ClearRetransTable(localExchange);                                                                                 \
        NL_TEST_ASSERT(aSuite, localRm->TestGetCountRetransTable() == 1);                                                          \
                                                                                                                                   \
        localRm->EnumerateRetransTable([localExchange](auto * entry) {                                                             \
            localExchange->SetPendingPeerAckMessageCounter(entry->retainedBuf.GetMessageCounter());                                \
            return Loop::Break;                                                                                                    \
        });                                                                                                                        \
    }

// Read Client sends the read request, Read Handler drops the response, then test injects unknown status reponse message for Read
// Client.
void TestReadInteraction::TestReadClientReceiveInvalidMessage(nlTestSuite * apSuite, void * apContext)
{
    TestContext & ctx = *static_cast<TestContext *>(apContext);
    CHIP_ERROR err    = CHIP_NO_ERROR;

    Messaging::ReliableMessageMgr * rm = ctx.GetExchangeManager().GetReliableMessageMgr();
    // Shouldn't have anything in the retransmit table when starting the test.
    NL_TEST_ASSERT(apSuite, rm->TestGetCountRetransTable() == 0);

    MockInteractionModelApp delegate;
    auto * engine = chip::app::InteractionModelEngine::GetInstance();
    err           = engine->Init(&ctx.GetExchangeManager(), &ctx.GetFabricTable(), app::reporting::GetDefaultReportScheduler());
    NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

    ReadPrepareParams readPrepareParams(ctx.GetSessionBobToAlice());

    chip::app::AttributePathParams attributePathParams[2];
    readPrepareParams.mpAttributePathParamsList                 = attributePathParams;
    readPrepareParams.mpAttributePathParamsList[0].mEndpointId  = kTestEndpointId;
    readPrepareParams.mpAttributePathParamsList[0].mClusterId   = kTestClusterId;
    readPrepareParams.mpAttributePathParamsList[0].mAttributeId = 1;

    readPrepareParams.mpAttributePathParamsList[1].mEndpointId  = kTestEndpointId;
    readPrepareParams.mpAttributePathParamsList[1].mClusterId   = kTestClusterId;
    readPrepareParams.mpAttributePathParamsList[1].mAttributeId = 2;

    readPrepareParams.mAttributePathParamsListSize = 2;

    {
        app::ReadClient readClient(engine, &ctx.GetExchangeManager(), delegate, chip::app::ReadClient::InteractionType::Read);

        ctx.GetLoopback().mSentMessageCount                 = 0;
        ctx.GetLoopback().mNumMessagesToDrop                = 1;
        ctx.GetLoopback().mNumMessagesToAllowBeforeDropping = 1;
        ctx.GetLoopback().mDroppedMessageCount              = 0;
        err                                                 = readClient.SendRequest(readPrepareParams);
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
        ctx.DrainAndServiceIO();

        NL_TEST_ASSERT(apSuite, ctx.GetLoopback().mSentMessageCount == 2);
        NL_TEST_ASSERT(apSuite, ctx.GetLoopback().mDroppedMessageCount == 1);

        System::PacketBufferHandle msgBuf = System::PacketBufferHandle::New(kMaxSecureSduLengthBytes);
        NL_TEST_ASSERT(apSuite, !msgBuf.IsNull());
        System::PacketBufferTLVWriter writer;
        writer.Init(std::move(msgBuf));
        StatusResponseMessage::Builder response;
        response.Init(&writer);
        response.Status(Protocols::InteractionModel::Status::Busy);
        NL_TEST_ASSERT(apSuite, writer.Finalize(&msgBuf) == CHIP_NO_ERROR);
        PayloadHeader payloadHeader;
        payloadHeader.SetExchangeID(0);
        payloadHeader.SetMessageType(chip::Protocols::InteractionModel::MsgType::StatusResponse);

        Test::MessageCapturer messageLog(ctx);
        messageLog.mCaptureStandaloneAcks = false;

        // Since we are dropping packets, things are not getting acked.  Set up
        // our MRP state to look like what it would have looked like if the
        // packet had not gotten dropped.
        PretendWeGotReplyFromServer(apSuite, ctx, readClient.mExchange.Get());

        ctx.GetLoopback().mSentMessageCount                 = 0;
        ctx.GetLoopback().mNumMessagesToDrop                = 0;
        ctx.GetLoopback().mNumMessagesToAllowBeforeDropping = 0;
        ctx.GetLoopback().mDroppedMessageCount              = 0;
        readClient.OnMessageReceived(readClient.mExchange.Get(), payloadHeader, std::move(msgBuf));
        ctx.DrainAndServiceIO();

        // The ReadHandler closed its exchange when it sent the Report Data (which we dropped).
        // Since we synthesized the StatusResponse to the ReadClient, instead of sending it from the ReadHandler,
        // the only messages here are the ReadClient's StatusResponse to the unexpected message and an MRP ack.
        NL_TEST_ASSERT(apSuite, delegate.mError == CHIP_IM_GLOBAL_STATUS(Busy));

        CheckForInvalidAction(apSuite, messageLog);
    }

    engine->Shutdown();
    ctx.ExpireSessionAliceToBob();
    ctx.ExpireSessionBobToAlice();
    ctx.CreateSessionAliceToBob();
    ctx.CreateSessionBobToAlice();
}

// Read Client sends the subscribe request, Read Handler drops the response, then test injects unknown status response message for
// Read Client.
void TestReadInteraction::TestSubscribeClientReceiveInvalidStatusResponse(nlTestSuite * apSuite, void * apContext)
{
    TestContext & ctx = *static_cast<TestContext *>(apContext);
    CHIP_ERROR err    = CHIP_NO_ERROR;

    Messaging::ReliableMessageMgr * rm = ctx.GetExchangeManager().GetReliableMessageMgr();
    // Shouldn't have anything in the retransmit table when starting the test.
    NL_TEST_ASSERT(apSuite, rm->TestGetCountRetransTable() == 0);

    MockInteractionModelApp delegate;
    auto * engine = chip::app::InteractionModelEngine::GetInstance();
    err           = engine->Init(&ctx.GetExchangeManager(), &ctx.GetFabricTable(), app::reporting::GetDefaultReportScheduler());
    NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

    ReadPrepareParams readPrepareParams(ctx.GetSessionBobToAlice());

    chip::app::AttributePathParams attributePathParams[2];
    readPrepareParams.mpAttributePathParamsList                 = attributePathParams;
    readPrepareParams.mpAttributePathParamsList[0].mEndpointId  = kTestEndpointId;
    readPrepareParams.mpAttributePathParamsList[0].mClusterId   = kTestClusterId;
    readPrepareParams.mpAttributePathParamsList[0].mAttributeId = 1;

    readPrepareParams.mpAttributePathParamsList[1].mEndpointId  = kTestEndpointId;
    readPrepareParams.mpAttributePathParamsList[1].mClusterId   = kTestClusterId;
    readPrepareParams.mpAttributePathParamsList[1].mAttributeId = 2;

    readPrepareParams.mAttributePathParamsListSize = 2;

    readPrepareParams.mMinIntervalFloorSeconds   = 2;
    readPrepareParams.mMaxIntervalCeilingSeconds = 5;

    {
        app::ReadClient readClient(chip::app::InteractionModelEngine::GetInstance(), &ctx.GetExchangeManager(), delegate,
                                   chip::app::ReadClient::InteractionType::Subscribe);

        ctx.GetLoopback().mSentMessageCount                 = 0;
        ctx.GetLoopback().mNumMessagesToDrop                = 1;
        ctx.GetLoopback().mNumMessagesToAllowBeforeDropping = 1;
        ctx.GetLoopback().mDroppedMessageCount              = 0;
        err                                                 = readClient.SendRequest(readPrepareParams);
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
        ctx.DrainAndServiceIO();

        System::PacketBufferHandle msgBuf = System::PacketBufferHandle::New(kMaxSecureSduLengthBytes);
        NL_TEST_ASSERT(apSuite, !msgBuf.IsNull());
        System::PacketBufferTLVWriter writer;
        writer.Init(std::move(msgBuf));
        StatusResponseMessage::Builder response;
        response.Init(&writer);
        response.Status(Protocols::InteractionModel::Status::Busy);
        NL_TEST_ASSERT(apSuite, writer.Finalize(&msgBuf) == CHIP_NO_ERROR);
        PayloadHeader payloadHeader;
        payloadHeader.SetExchangeID(0);
        payloadHeader.SetMessageType(chip::Protocols::InteractionModel::MsgType::StatusResponse);

        // Since we are dropping packets, things are not getting acked.  Set up
        // our MRP state to look like what it would have looked like if the
        // packet had not gotten dropped.
        PretendWeGotReplyFromServer(apSuite, ctx, readClient.mExchange.Get());

        NL_TEST_ASSERT(apSuite, ctx.GetLoopback().mSentMessageCount == 2);
        NL_TEST_ASSERT(apSuite, ctx.GetLoopback().mDroppedMessageCount == 1);
        NL_TEST_ASSERT(apSuite, engine->GetNumActiveReadHandlers() == 1);
        NL_TEST_ASSERT(apSuite, engine->ActiveHandlerAt(0) != nullptr);

        ctx.GetLoopback().mSentMessageCount                 = 0;
        ctx.GetLoopback().mNumMessagesToDrop                = 0;
        ctx.GetLoopback().mNumMessagesToAllowBeforeDropping = 0;
        ctx.GetLoopback().mDroppedMessageCount              = 0;

        readClient.OnMessageReceived(readClient.mExchange.Get(), payloadHeader, std::move(msgBuf));
        ctx.DrainAndServiceIO();

        // TODO: Need to validate what status is being sent to the ReadHandler
        // The ReadHandler's exchange is closed when we synthesize the subscribe response, since it sent the
        // Subscribe Response as the last message in the transaction.
        // Since we synthesized the subscribe response to the ReadClient, instead of sending it from the ReadHandler,
        // the only messages here are the ReadClient's StatusResponse to the unexpected message and an MRP ack.
        NL_TEST_ASSERT(apSuite, ctx.GetLoopback().mSentMessageCount == 2);

        NL_TEST_ASSERT(apSuite, delegate.mError == CHIP_IM_GLOBAL_STATUS(Busy));
        NL_TEST_ASSERT(apSuite, engine->GetNumActiveReadHandlers() == 0);
    }
    NL_TEST_ASSERT(apSuite, engine->GetNumActiveReadClients() == 0);
    engine->Shutdown();
    ctx.ExpireSessionAliceToBob();
    ctx.ExpireSessionBobToAlice();
    ctx.CreateSessionAliceToBob();
    ctx.CreateSessionBobToAlice();
}

// Read Client sends the subscribe request, Read Handler drops the response, then test injects well-formed status response message
// with Success for Read Client, we expect the error with CHIP_ERROR_INVALID_MESSAGE_TYPE
void TestReadInteraction::TestSubscribeClientReceiveWellFormedStatusResponse(nlTestSuite * apSuite, void * apContext)
{
    TestContext & ctx = *static_cast<TestContext *>(apContext);
    CHIP_ERROR err    = CHIP_NO_ERROR;

    Messaging::ReliableMessageMgr * rm = ctx.GetExchangeManager().GetReliableMessageMgr();
    // Shouldn't have anything in the retransmit table when starting the test.
    NL_TEST_ASSERT(apSuite, rm->TestGetCountRetransTable() == 0);

    MockInteractionModelApp delegate;
    auto * engine = chip::app::InteractionModelEngine::GetInstance();
    err           = engine->Init(&ctx.GetExchangeManager(), &ctx.GetFabricTable(), app::reporting::GetDefaultReportScheduler());
    NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

    ReadPrepareParams readPrepareParams(ctx.GetSessionBobToAlice());

    chip::app::AttributePathParams attributePathParams[2];
    readPrepareParams.mpAttributePathParamsList                 = attributePathParams;
    readPrepareParams.mpAttributePathParamsList[0].mEndpointId  = kTestEndpointId;
    readPrepareParams.mpAttributePathParamsList[0].mClusterId   = kTestClusterId;
    readPrepareParams.mpAttributePathParamsList[0].mAttributeId = 1;

    readPrepareParams.mpAttributePathParamsList[1].mEndpointId  = kTestEndpointId;
    readPrepareParams.mpAttributePathParamsList[1].mClusterId   = kTestClusterId;
    readPrepareParams.mpAttributePathParamsList[1].mAttributeId = 2;

    readPrepareParams.mAttributePathParamsListSize = 2;

    readPrepareParams.mMinIntervalFloorSeconds   = 2;
    readPrepareParams.mMaxIntervalCeilingSeconds = 5;

    {
        app::ReadClient readClient(chip::app::InteractionModelEngine::GetInstance(), &ctx.GetExchangeManager(), delegate,
                                   chip::app::ReadClient::InteractionType::Subscribe);

        ctx.GetLoopback().mSentMessageCount                 = 0;
        ctx.GetLoopback().mNumMessagesToDrop                = 1;
        ctx.GetLoopback().mNumMessagesToAllowBeforeDropping = 1;
        ctx.GetLoopback().mDroppedMessageCount              = 0;
        err                                                 = readClient.SendRequest(readPrepareParams);
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
        ctx.DrainAndServiceIO();

        System::PacketBufferHandle msgBuf = System::PacketBufferHandle::New(kMaxSecureSduLengthBytes);
        NL_TEST_ASSERT(apSuite, !msgBuf.IsNull());
        System::PacketBufferTLVWriter writer;
        writer.Init(std::move(msgBuf));
        StatusResponseMessage::Builder response;
        response.Init(&writer);
        response.Status(Protocols::InteractionModel::Status::Success);
        NL_TEST_ASSERT(apSuite, writer.Finalize(&msgBuf) == CHIP_NO_ERROR);
        PayloadHeader payloadHeader;
        payloadHeader.SetExchangeID(0);
        payloadHeader.SetMessageType(chip::Protocols::InteractionModel::MsgType::StatusResponse);

        // Since we are dropping packets, things are not getting acked.  Set up
        // our MRP state to look like what it would have looked like if the
        // packet had not gotten dropped.
        PretendWeGotReplyFromServer(apSuite, ctx, readClient.mExchange.Get());

        NL_TEST_ASSERT(apSuite, ctx.GetLoopback().mSentMessageCount == 2);
        NL_TEST_ASSERT(apSuite, ctx.GetLoopback().mDroppedMessageCount == 1);
        NL_TEST_ASSERT(apSuite, engine->GetNumActiveReadHandlers() == 1);
        NL_TEST_ASSERT(apSuite, engine->ActiveHandlerAt(0) != nullptr);

        ctx.GetLoopback().mSentMessageCount                 = 0;
        ctx.GetLoopback().mNumMessagesToDrop                = 0;
        ctx.GetLoopback().mNumMessagesToAllowBeforeDropping = 0;
        ctx.GetLoopback().mDroppedMessageCount              = 0;

        readClient.OnMessageReceived(readClient.mExchange.Get(), payloadHeader, std::move(msgBuf));
        ctx.DrainAndServiceIO();

        // TODO: Need to validate what status is being sent to the ReadHandler
        // The ReadHandler's exchange is still open when we synthesize the StatusResponse.
        // Since we synthesized the StatusResponse to the ReadClient, instead of sending it from the ReadHandler,
        // the only messages here are the ReadClient's StatusResponse to the unexpected message and an MRP ack.
        NL_TEST_ASSERT(apSuite, ctx.GetLoopback().mSentMessageCount == 2);

        NL_TEST_ASSERT(apSuite, delegate.mError == CHIP_ERROR_INVALID_MESSAGE_TYPE);
        NL_TEST_ASSERT(apSuite, engine->GetNumActiveReadHandlers() == 0);
    }
    NL_TEST_ASSERT(apSuite, engine->GetNumActiveReadClients() == 0);
    engine->Shutdown();
    ctx.ExpireSessionAliceToBob();
    ctx.ExpireSessionBobToAlice();
    ctx.CreateSessionAliceToBob();
    ctx.CreateSessionBobToAlice();
}

// Read Client sends the subscribe request, Read Handler drops the response, then test injects invalid report message for Read
// Client.
void TestReadInteraction::TestSubscribeClientReceiveInvalidReportMessage(nlTestSuite * apSuite, void * apContext)
{
    TestContext & ctx = *static_cast<TestContext *>(apContext);
    CHIP_ERROR err    = CHIP_NO_ERROR;

    Messaging::ReliableMessageMgr * rm = ctx.GetExchangeManager().GetReliableMessageMgr();
    // Shouldn't have anything in the retransmit table when starting the test.
    NL_TEST_ASSERT(apSuite, rm->TestGetCountRetransTable() == 0);

    MockInteractionModelApp delegate;
    auto * engine = chip::app::InteractionModelEngine::GetInstance();
    err           = engine->Init(&ctx.GetExchangeManager(), &ctx.GetFabricTable(), app::reporting::GetDefaultReportScheduler());
    NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

    ReadPrepareParams readPrepareParams(ctx.GetSessionBobToAlice());

    chip::app::AttributePathParams attributePathParams[2];
    readPrepareParams.mpAttributePathParamsList                 = attributePathParams;
    readPrepareParams.mpAttributePathParamsList[0].mEndpointId  = kTestEndpointId;
    readPrepareParams.mpAttributePathParamsList[0].mClusterId   = kTestClusterId;
    readPrepareParams.mpAttributePathParamsList[0].mAttributeId = 1;

    readPrepareParams.mpAttributePathParamsList[1].mEndpointId  = kTestEndpointId;
    readPrepareParams.mpAttributePathParamsList[1].mClusterId   = kTestClusterId;
    readPrepareParams.mpAttributePathParamsList[1].mAttributeId = 2;

    readPrepareParams.mAttributePathParamsListSize = 2;

    readPrepareParams.mMinIntervalFloorSeconds   = 2;
    readPrepareParams.mMaxIntervalCeilingSeconds = 5;

    {
        app::ReadClient readClient(chip::app::InteractionModelEngine::GetInstance(), &ctx.GetExchangeManager(), delegate,
                                   chip::app::ReadClient::InteractionType::Subscribe);

        ctx.GetLoopback().mSentMessageCount                 = 0;
        ctx.GetLoopback().mNumMessagesToDrop                = 1;
        ctx.GetLoopback().mNumMessagesToAllowBeforeDropping = 1;
        ctx.GetLoopback().mDroppedMessageCount              = 0;
        err                                                 = readClient.SendRequest(readPrepareParams);
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
        ctx.DrainAndServiceIO();

        System::PacketBufferHandle msgBuf = System::PacketBufferHandle::New(kMaxSecureSduLengthBytes);
        NL_TEST_ASSERT(apSuite, !msgBuf.IsNull());
        System::PacketBufferTLVWriter writer;
        writer.Init(std::move(msgBuf));
        ReportDataMessage::Builder response;
        response.Init(&writer);
        NL_TEST_ASSERT(apSuite, writer.Finalize(&msgBuf) == CHIP_NO_ERROR);
        PayloadHeader payloadHeader;
        payloadHeader.SetExchangeID(0);
        payloadHeader.SetMessageType(chip::Protocols::InteractionModel::MsgType::ReportData);

        // Since we are dropping packets, things are not getting acked.  Set up
        // our MRP state to look like what it would have looked like if the
        // packet had not gotten dropped.
        PretendWeGotReplyFromServer(apSuite, ctx, readClient.mExchange.Get());

        NL_TEST_ASSERT(apSuite, ctx.GetLoopback().mSentMessageCount == 2);
        NL_TEST_ASSERT(apSuite, ctx.GetLoopback().mDroppedMessageCount == 1);
        NL_TEST_ASSERT(apSuite, engine->GetNumActiveReadHandlers() == 1);
        NL_TEST_ASSERT(apSuite, engine->ActiveHandlerAt(0) != nullptr);

        ctx.GetLoopback().mSentMessageCount                 = 0;
        ctx.GetLoopback().mNumMessagesToDrop                = 0;
        ctx.GetLoopback().mNumMessagesToAllowBeforeDropping = 0;
        ctx.GetLoopback().mDroppedMessageCount              = 0;

        readClient.OnMessageReceived(readClient.mExchange.Get(), payloadHeader, std::move(msgBuf));
        ctx.DrainAndServiceIO();

        // TODO: Need to validate what status is being sent to the ReadHandler
        // The ReadHandler's exchange is still open when we synthesize the ReportData.
        // Since we synthesized the ReportData to the ReadClient, instead of sending it from the ReadHandler,
        // the only messages here are the ReadClient's StatusResponse to the unexpected message and an MRP ack.
        NL_TEST_ASSERT(apSuite, ctx.GetLoopback().mSentMessageCount == 2);

        NL_TEST_ASSERT(apSuite, delegate.mError == CHIP_ERROR_END_OF_TLV);

        NL_TEST_ASSERT(apSuite, engine->GetNumActiveReadHandlers() == 0);
    }
    NL_TEST_ASSERT(apSuite, engine->GetNumActiveReadClients() == 0);
    engine->Shutdown();
    ctx.ExpireSessionAliceToBob();
    ctx.ExpireSessionBobToAlice();
    ctx.CreateSessionAliceToBob();
    ctx.CreateSessionBobToAlice();
}

// Read Client create the subscription, handler sends unsolicited malformed report to client,
// InteractionModelEngine::OnUnsolicitedReportData would process this malformed report and sends out status report
void TestReadInteraction::TestSubscribeClientReceiveUnsolicitedInvalidReportMessage(nlTestSuite * apSuite, void * apContext)
{
    TestContext & ctx = *static_cast<TestContext *>(apContext);
    CHIP_ERROR err    = CHIP_NO_ERROR;

    Messaging::ReliableMessageMgr * rm = ctx.GetExchangeManager().GetReliableMessageMgr();
    // Shouldn't have anything in the retransmit table when starting the test.
    NL_TEST_ASSERT(apSuite, rm->TestGetCountRetransTable() == 0);

    MockInteractionModelApp delegate;
    auto * engine = chip::app::InteractionModelEngine::GetInstance();
    err           = engine->Init(&ctx.GetExchangeManager(), &ctx.GetFabricTable(), app::reporting::GetDefaultReportScheduler());
    NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

    ReadPrepareParams readPrepareParams(ctx.GetSessionBobToAlice());

    chip::app::AttributePathParams attributePathParams[2];
    readPrepareParams.mpAttributePathParamsList                 = attributePathParams;
    readPrepareParams.mpAttributePathParamsList[0].mEndpointId  = kTestEndpointId;
    readPrepareParams.mpAttributePathParamsList[0].mClusterId   = kTestClusterId;
    readPrepareParams.mpAttributePathParamsList[0].mAttributeId = 1;

    readPrepareParams.mpAttributePathParamsList[1].mEndpointId  = kTestEndpointId;
    readPrepareParams.mpAttributePathParamsList[1].mClusterId   = kTestClusterId;
    readPrepareParams.mpAttributePathParamsList[1].mAttributeId = 2;

    readPrepareParams.mAttributePathParamsListSize = 2;

    readPrepareParams.mMinIntervalFloorSeconds   = 2;
    readPrepareParams.mMaxIntervalCeilingSeconds = 5;

    {
        ctx.GetLoopback().mSentMessageCount = 0;
        app::ReadClient readClient(chip::app::InteractionModelEngine::GetInstance(), &ctx.GetExchangeManager(), delegate,
                                   chip::app::ReadClient::InteractionType::Subscribe);

        err = readClient.SendRequest(readPrepareParams);
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
        ctx.DrainAndServiceIO();
        NL_TEST_ASSERT(apSuite, ctx.GetLoopback().mSentMessageCount == 5);
        NL_TEST_ASSERT(apSuite, engine->GetNumActiveReadHandlers() == 1);
        NL_TEST_ASSERT(apSuite, engine->ActiveHandlerAt(0) != nullptr);
        delegate.mpReadHandler = engine->ActiveHandlerAt(0);

        System::PacketBufferHandle msgBuf = System::PacketBufferHandle::New(kMaxSecureSduLengthBytes);
        NL_TEST_ASSERT(apSuite, !msgBuf.IsNull());
        System::PacketBufferTLVWriter writer;
        writer.Init(std::move(msgBuf));
        ReportDataMessage::Builder response;
        response.Init(&writer);
        NL_TEST_ASSERT(apSuite, writer.Finalize(&msgBuf) == CHIP_NO_ERROR);

        ctx.GetLoopback().mSentMessageCount = 0;
        auto exchange                       = InteractionModelEngine::GetInstance()->GetExchangeManager()->NewContext(
            delegate.mpReadHandler->mSessionHandle.Get().Value(), delegate.mpReadHandler);
        delegate.mpReadHandler->mExchangeCtx.Grab(exchange);
        err = delegate.mpReadHandler->mExchangeCtx->SendMessage(Protocols::InteractionModel::MsgType::ReportData, std::move(msgBuf),
                                                                Messaging::SendMessageFlags::kExpectResponse);
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
        ctx.DrainAndServiceIO();

        // The server sends a data report.
        // The client receives the data report data and sends out status report with invalid action.
        // The server acks the status report.
        NL_TEST_ASSERT(apSuite, ctx.GetLoopback().mSentMessageCount == 3);
    }
    NL_TEST_ASSERT(apSuite, engine->GetNumActiveReadClients() == 0);
    engine->Shutdown();
}

// Read Client sends the subscribe request, Read Handler drops the subscribe response, then test injects invalid subscribe response
// message
void TestReadInteraction::TestSubscribeClientReceiveInvalidSubscribeResponseMessage(nlTestSuite * apSuite, void * apContext)
{
    TestContext & ctx = *static_cast<TestContext *>(apContext);
    CHIP_ERROR err    = CHIP_NO_ERROR;

    Messaging::ReliableMessageMgr * rm = ctx.GetExchangeManager().GetReliableMessageMgr();
    // Shouldn't have anything in the retransmit table when starting the test.
    NL_TEST_ASSERT(apSuite, rm->TestGetCountRetransTable() == 0);

    MockInteractionModelApp delegate;
    auto * engine = chip::app::InteractionModelEngine::GetInstance();
    err           = engine->Init(&ctx.GetExchangeManager(), &ctx.GetFabricTable(), app::reporting::GetDefaultReportScheduler());
    NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

    ReadPrepareParams readPrepareParams(ctx.GetSessionBobToAlice());

    chip::app::AttributePathParams attributePathParams[2];
    readPrepareParams.mpAttributePathParamsList                 = attributePathParams;
    readPrepareParams.mpAttributePathParamsList[0].mEndpointId  = kTestEndpointId;
    readPrepareParams.mpAttributePathParamsList[0].mClusterId   = kTestClusterId;
    readPrepareParams.mpAttributePathParamsList[0].mAttributeId = 1;

    readPrepareParams.mpAttributePathParamsList[1].mEndpointId  = kTestEndpointId;
    readPrepareParams.mpAttributePathParamsList[1].mClusterId   = kTestClusterId;
    readPrepareParams.mpAttributePathParamsList[1].mAttributeId = 2;

    readPrepareParams.mAttributePathParamsListSize = 2;

    readPrepareParams.mMinIntervalFloorSeconds   = 2;
    readPrepareParams.mMaxIntervalCeilingSeconds = 5;

    {
        app::ReadClient readClient(chip::app::InteractionModelEngine::GetInstance(), &ctx.GetExchangeManager(), delegate,
                                   chip::app::ReadClient::InteractionType::Subscribe);

        ctx.GetLoopback().mSentMessageCount                 = 0;
        ctx.GetLoopback().mNumMessagesToDrop                = 1;
        ctx.GetLoopback().mNumMessagesToAllowBeforeDropping = 3;
        ctx.GetLoopback().mDroppedMessageCount              = 0;
        err                                                 = readClient.SendRequest(readPrepareParams);
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
        ctx.DrainAndServiceIO();

        System::PacketBufferHandle msgBuf = System::PacketBufferHandle::New(kMaxSecureSduLengthBytes);
        NL_TEST_ASSERT(apSuite, !msgBuf.IsNull());
        System::PacketBufferTLVWriter writer;
        writer.Init(std::move(msgBuf));
        SubscribeResponseMessage::Builder response;
        response.Init(&writer);
        response.SubscriptionId(readClient.mSubscriptionId + 1);
        response.MaxInterval(1);
        response.EndOfSubscribeResponseMessage();
        NL_TEST_ASSERT(apSuite, writer.Finalize(&msgBuf) == CHIP_NO_ERROR);
        PayloadHeader payloadHeader;
        payloadHeader.SetExchangeID(0);
        payloadHeader.SetMessageType(chip::Protocols::InteractionModel::MsgType::SubscribeResponse);

        // Since we are dropping packets, things are not getting acked.  Set up
        // our MRP state to look like what it would have looked like if the
        // packet had not gotten dropped.
        PretendWeGotReplyFromServer(apSuite, ctx, readClient.mExchange.Get());

        NL_TEST_ASSERT(apSuite, ctx.GetLoopback().mSentMessageCount == 4);
        NL_TEST_ASSERT(apSuite, ctx.GetLoopback().mDroppedMessageCount == 1);
        NL_TEST_ASSERT(apSuite, engine->GetNumActiveReadHandlers() == 1);
        NL_TEST_ASSERT(apSuite, engine->ActiveHandlerAt(0) != nullptr);

        ctx.GetLoopback().mSentMessageCount                 = 0;
        ctx.GetLoopback().mNumMessagesToDrop                = 0;
        ctx.GetLoopback().mNumMessagesToAllowBeforeDropping = 0;
        ctx.GetLoopback().mDroppedMessageCount              = 0;

        readClient.OnMessageReceived(readClient.mExchange.Get(), payloadHeader, std::move(msgBuf));
        ctx.DrainAndServiceIO();

        // TODO: Need to validate what status is being sent to the ReadHandler
        // The ReadHandler's exchange is still open when we synthesize the subscribe response.
        // Since we synthesized the subscribe response to the ReadClient, instead of sending it from the ReadHandler,
        // the only messages here are the ReadClient's StatusResponse to the unexpected message and an MRP ack.
        NL_TEST_ASSERT(apSuite, ctx.GetLoopback().mSentMessageCount == 2);

        NL_TEST_ASSERT(apSuite, delegate.mError == CHIP_ERROR_INVALID_SUBSCRIPTION);
    }
    NL_TEST_ASSERT(apSuite, engine->GetNumActiveReadClients() == 0);
    engine->Shutdown();
    ctx.ExpireSessionAliceToBob();
    ctx.ExpireSessionBobToAlice();
    ctx.CreateSessionAliceToBob();
    ctx.CreateSessionBobToAlice();
}

// Read Client create the subscription, handler sends unsolicited malformed report with invalid subscription id to client,
// InteractionModelEngine::OnUnsolicitedReportData would process this malformed report and sends out status report
void TestReadInteraction::TestSubscribeClientReceiveUnsolicitedReportMessageWithInvalidSubscriptionId(nlTestSuite * apSuite,
                                                                                                      void * apContext)
{
    TestContext & ctx = *static_cast<TestContext *>(apContext);
    CHIP_ERROR err    = CHIP_NO_ERROR;

    Messaging::ReliableMessageMgr * rm = ctx.GetExchangeManager().GetReliableMessageMgr();
    // Shouldn't have anything in the retransmit table when starting the test.
    NL_TEST_ASSERT(apSuite, rm->TestGetCountRetransTable() == 0);

    MockInteractionModelApp delegate;
    auto * engine = chip::app::InteractionModelEngine::GetInstance();
    err           = engine->Init(&ctx.GetExchangeManager(), &ctx.GetFabricTable(), app::reporting::GetDefaultReportScheduler());
    NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

    ReadPrepareParams readPrepareParams(ctx.GetSessionBobToAlice());

    chip::app::AttributePathParams attributePathParams[2];
    readPrepareParams.mpAttributePathParamsList                 = attributePathParams;
    readPrepareParams.mpAttributePathParamsList[0].mEndpointId  = kTestEndpointId;
    readPrepareParams.mpAttributePathParamsList[0].mClusterId   = kTestClusterId;
    readPrepareParams.mpAttributePathParamsList[0].mAttributeId = 1;

    readPrepareParams.mpAttributePathParamsList[1].mEndpointId  = kTestEndpointId;
    readPrepareParams.mpAttributePathParamsList[1].mClusterId   = kTestClusterId;
    readPrepareParams.mpAttributePathParamsList[1].mAttributeId = 2;

    readPrepareParams.mAttributePathParamsListSize = 2;

    readPrepareParams.mMinIntervalFloorSeconds   = 2;
    readPrepareParams.mMaxIntervalCeilingSeconds = 5;

    {
        ctx.GetLoopback().mSentMessageCount = 0;
        app::ReadClient readClient(chip::app::InteractionModelEngine::GetInstance(), &ctx.GetExchangeManager(), delegate,
                                   chip::app::ReadClient::InteractionType::Subscribe);

        err = readClient.SendRequest(readPrepareParams);
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
        ctx.DrainAndServiceIO();
        NL_TEST_ASSERT(apSuite, ctx.GetLoopback().mSentMessageCount == 5);
        NL_TEST_ASSERT(apSuite, engine->GetNumActiveReadHandlers() == 1);
        NL_TEST_ASSERT(apSuite, engine->ActiveHandlerAt(0) != nullptr);
        delegate.mpReadHandler = engine->ActiveHandlerAt(0);

        System::PacketBufferHandle msgBuf = System::PacketBufferHandle::New(kMaxSecureSduLengthBytes);
        NL_TEST_ASSERT(apSuite, !msgBuf.IsNull());
        System::PacketBufferTLVWriter writer;
        writer.Init(std::move(msgBuf));
        ReportDataMessage::Builder response;
        response.Init(&writer);
        response.SubscriptionId(readClient.mSubscriptionId + 1);
        response.EndOfReportDataMessage();

        NL_TEST_ASSERT(apSuite, writer.Finalize(&msgBuf) == CHIP_NO_ERROR);

        ctx.GetLoopback().mSentMessageCount = 0;
        auto exchange                       = InteractionModelEngine::GetInstance()->GetExchangeManager()->NewContext(
            delegate.mpReadHandler->mSessionHandle.Get().Value(), delegate.mpReadHandler);
        delegate.mpReadHandler->mExchangeCtx.Grab(exchange);
        err = delegate.mpReadHandler->mExchangeCtx->SendMessage(Protocols::InteractionModel::MsgType::ReportData, std::move(msgBuf),
                                                                Messaging::SendMessageFlags::kExpectResponse);
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
        ctx.DrainAndServiceIO();

        // The server sends a data report.
        // The client receives the data report data and sends out status report with invalid subsciption.
        // The server should respond with a status report of its own, leading to 4 messages (because
        // the client would ack the server's status report), just sends an ack to the status report it got.
        NL_TEST_ASSERT(apSuite, ctx.GetLoopback().mSentMessageCount == 3);
    }
    NL_TEST_ASSERT(apSuite, engine->GetNumActiveReadClients() == 0);
    engine->Shutdown();
}

// TestReadChunkingInvalidSubscriptionId will try to read a few large attributes, the report won't fit into the MTU and result in
// chunking, second report has different subscription id from the first one, read client sends out the status report with invalid
// subscription
void TestReadInteraction::TestReadChunkingInvalidSubscriptionId(nlTestSuite * apSuite, void * apContext)
{
    TestContext & ctx = *static_cast<TestContext *>(apContext);
    CHIP_ERROR err    = CHIP_NO_ERROR;

    Messaging::ReliableMessageMgr * rm = ctx.GetExchangeManager().GetReliableMessageMgr();
    // Shouldn't have anything in the retransmit table when starting the test.
    NL_TEST_ASSERT(apSuite, rm->TestGetCountRetransTable() == 0);

    GenerateEvents(apSuite, apContext);

    MockInteractionModelApp delegate;
    auto * engine = chip::app::InteractionModelEngine::GetInstance();
    err           = engine->Init(&ctx.GetExchangeManager(), &ctx.GetFabricTable(), app::reporting::GetDefaultReportScheduler());
    NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
    NL_TEST_ASSERT(apSuite, !delegate.mGotEventResponse);

    chip::app::AttributePathParams attributePathParams[1];
    // Mock Attribute 4 is a big attribute, with 6 large OCTET_STRING
    attributePathParams[0].mEndpointId  = Test::kMockEndpoint3;
    attributePathParams[0].mClusterId   = Test::MockClusterId(2);
    attributePathParams[0].mAttributeId = Test::MockAttributeId(4);

    ReadPrepareParams readPrepareParams(ctx.GetSessionBobToAlice());
    readPrepareParams.mpEventPathParamsList        = nullptr;
    readPrepareParams.mEventPathParamsListSize     = 0;
    readPrepareParams.mpAttributePathParamsList    = attributePathParams;
    readPrepareParams.mAttributePathParamsListSize = 1;

    {
        app::ReadClient readClient(chip::app::InteractionModelEngine::GetInstance(), &ctx.GetExchangeManager(), delegate,
                                   chip::app::ReadClient::InteractionType::Subscribe);

        ctx.GetLoopback().mSentMessageCount                 = 0;
        ctx.GetLoopback().mNumMessagesToDrop                = 1;
        ctx.GetLoopback().mNumMessagesToAllowBeforeDropping = 3;
        ctx.GetLoopback().mDroppedMessageCount              = 0;
        err                                                 = readClient.SendRequest(readPrepareParams);
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

        ctx.DrainAndServiceIO();

        System::PacketBufferHandle msgBuf = System::PacketBufferHandle::New(kMaxSecureSduLengthBytes);
        NL_TEST_ASSERT(apSuite, !msgBuf.IsNull());
        System::PacketBufferTLVWriter writer;
        writer.Init(std::move(msgBuf));
        ReportDataMessage::Builder response;
        response.Init(&writer);
        response.SubscriptionId(readClient.mSubscriptionId + 1);
        response.EndOfReportDataMessage();
        PayloadHeader payloadHeader;
        payloadHeader.SetExchangeID(0);
        payloadHeader.SetMessageType(chip::Protocols::InteractionModel::MsgType::ReportData);

        NL_TEST_ASSERT(apSuite, writer.Finalize(&msgBuf) == CHIP_NO_ERROR);

        // Since we are dropping packets, things are not getting acked.  Set up
        // our MRP state to look like what it would have looked like if the
        // packet had not gotten dropped.
        PretendWeGotReplyFromServer(apSuite, ctx, readClient.mExchange.Get());

        NL_TEST_ASSERT(apSuite, ctx.GetLoopback().mSentMessageCount == 4);
        NL_TEST_ASSERT(apSuite, ctx.GetLoopback().mDroppedMessageCount == 1);
        NL_TEST_ASSERT(apSuite, engine->GetNumActiveReadHandlers() == 1);
        NL_TEST_ASSERT(apSuite, engine->ActiveHandlerAt(0) != nullptr);

        ctx.GetLoopback().mSentMessageCount                 = 0;
        ctx.GetLoopback().mNumMessagesToDrop                = 0;
        ctx.GetLoopback().mNumMessagesToAllowBeforeDropping = 0;
        ctx.GetLoopback().mDroppedMessageCount              = 0;

        readClient.OnMessageReceived(readClient.mExchange.Get(), payloadHeader, std::move(msgBuf));
        ctx.DrainAndServiceIO();

        // TODO: Need to validate what status is being sent to the ReadHandler
        // The ReadHandler's exchange is still open when we synthesize the report data message.
        // Since we synthesized the second report data message to the ReadClient with invalid subscription id, instead of sending it
        // from the ReadHandler, the only messages here are the ReadClient's StatusResponse to the unexpected message and an MRP
        // ack.
        NL_TEST_ASSERT(apSuite, ctx.GetLoopback().mSentMessageCount == 2);

        NL_TEST_ASSERT(apSuite, delegate.mError == CHIP_ERROR_INVALID_SUBSCRIPTION);
    }
    NL_TEST_ASSERT(apSuite, engine->GetNumActiveReadClients() == 0);
    engine->Shutdown();
    ctx.ExpireSessionAliceToBob();
    ctx.ExpireSessionBobToAlice();
    ctx.CreateSessionAliceToBob();
    ctx.CreateSessionBobToAlice();
}

// Read Client sends a malformed subscribe request, interaction model engine fails to parse the request and generates a status
// report to client, and client is closed.
void TestReadInteraction::TestReadHandlerMalformedSubscribeRequest(nlTestSuite * apSuite, void * apContext)
{
    TestContext & ctx = *static_cast<TestContext *>(apContext);
    CHIP_ERROR err    = CHIP_NO_ERROR;

    Messaging::ReliableMessageMgr * rm = ctx.GetExchangeManager().GetReliableMessageMgr();
    // Shouldn't have anything in the retransmit table when starting the test.
    NL_TEST_ASSERT(apSuite, rm->TestGetCountRetransTable() == 0);

    MockInteractionModelApp delegate;
    auto * engine = chip::app::InteractionModelEngine::GetInstance();
    err           = engine->Init(&ctx.GetExchangeManager(), &ctx.GetFabricTable(), app::reporting::GetDefaultReportScheduler());
    NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

    ReadPrepareParams readPrepareParams(ctx.GetSessionBobToAlice());

    {
        app::ReadClient readClient(chip::app::InteractionModelEngine::GetInstance(), &ctx.GetExchangeManager(), delegate,
                                   chip::app::ReadClient::InteractionType::Subscribe);
        System::PacketBufferHandle msgBuf;
        ReadRequestMessage::Builder request;
        System::PacketBufferTLVWriter writer;

        chip::app::InitWriterWithSpaceReserved(writer, 0);
        err = request.Init(&writer);
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
        err = writer.Finalize(&msgBuf);
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
        auto exchange = readClient.mpExchangeMgr->NewContext(readPrepareParams.mSessionHolder.Get().Value(), &readClient);
        NL_TEST_ASSERT(apSuite, exchange != nullptr);
        readClient.mExchange.Grab(exchange);
        readClient.MoveToState(app::ReadClient::ClientState::AwaitingInitialReport);
        err = readClient.mExchange->SendMessage(Protocols::InteractionModel::MsgType::ReadRequest, std::move(msgBuf),
                                                Messaging::SendFlags(Messaging::SendMessageFlags::kExpectResponse));
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
        ctx.DrainAndServiceIO();
        NL_TEST_ASSERT(apSuite, delegate.mError == CHIP_IM_GLOBAL_STATUS(InvalidAction));
    }
    NL_TEST_ASSERT(apSuite, engine->GetNumActiveReadClients() == 0);
    engine->Shutdown();
    NL_TEST_ASSERT(apSuite, ctx.GetExchangeManager().GetNumActiveExchanges() == 0);
}

// Read Client sends a malformed read request, interaction model engine fails to parse the request and generates a status report to
// client, and client is closed.
void TestReadInteraction::TestReadHandlerMalformedReadRequest1(nlTestSuite * apSuite, void * apContext)
{
    TestContext & ctx = *static_cast<TestContext *>(apContext);
    CHIP_ERROR err    = CHIP_NO_ERROR;

    Messaging::ReliableMessageMgr * rm = ctx.GetExchangeManager().GetReliableMessageMgr();
    // Shouldn't have anything in the retransmit table when starting the test.
    NL_TEST_ASSERT(apSuite, rm->TestGetCountRetransTable() == 0);

    MockInteractionModelApp delegate;
    auto * engine = chip::app::InteractionModelEngine::GetInstance();
    err           = engine->Init(&ctx.GetExchangeManager(), &ctx.GetFabricTable(), app::reporting::GetDefaultReportScheduler());
    NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

    ReadPrepareParams readPrepareParams(ctx.GetSessionBobToAlice());

    {
        app::ReadClient readClient(chip::app::InteractionModelEngine::GetInstance(), &ctx.GetExchangeManager(), delegate,
                                   chip::app::ReadClient::InteractionType::Read);
        System::PacketBufferHandle msgBuf;
        ReadRequestMessage::Builder request;
        System::PacketBufferTLVWriter writer;

        chip::app::InitWriterWithSpaceReserved(writer, 0);
        err = request.Init(&writer);
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
        err = writer.Finalize(&msgBuf);
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
        auto exchange = readClient.mpExchangeMgr->NewContext(readPrepareParams.mSessionHolder.Get().Value(), &readClient);
        NL_TEST_ASSERT(apSuite, exchange != nullptr);
        readClient.mExchange.Grab(exchange);
        readClient.MoveToState(app::ReadClient::ClientState::AwaitingInitialReport);
        err = readClient.mExchange->SendMessage(Protocols::InteractionModel::MsgType::ReadRequest, std::move(msgBuf),
                                                Messaging::SendFlags(Messaging::SendMessageFlags::kExpectResponse));
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
        ctx.DrainAndServiceIO();
        NL_TEST_ASSERT(apSuite, delegate.mError == CHIP_IM_GLOBAL_STATUS(InvalidAction));
    }
    NL_TEST_ASSERT(apSuite, engine->GetNumActiveReadClients() == 0);
    engine->Shutdown();
    NL_TEST_ASSERT(apSuite, ctx.GetExchangeManager().GetNumActiveExchanges() == 0);
}

// Read Client sends a malformed read request, read handler fails to parse the request and generates a status report to client, and
// client is closed.
void TestReadInteraction::TestReadHandlerMalformedReadRequest2(nlTestSuite * apSuite, void * apContext)
{
    TestContext & ctx = *static_cast<TestContext *>(apContext);
    CHIP_ERROR err    = CHIP_NO_ERROR;

    Messaging::ReliableMessageMgr * rm = ctx.GetExchangeManager().GetReliableMessageMgr();
    // Shouldn't have anything in the retransmit table when starting the test.
    NL_TEST_ASSERT(apSuite, rm->TestGetCountRetransTable() == 0);

    MockInteractionModelApp delegate;
    auto * engine = chip::app::InteractionModelEngine::GetInstance();
    err           = engine->Init(&ctx.GetExchangeManager(), &ctx.GetFabricTable(), app::reporting::GetDefaultReportScheduler());
    NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

    ReadPrepareParams readPrepareParams(ctx.GetSessionBobToAlice());

    {
        app::ReadClient readClient(chip::app::InteractionModelEngine::GetInstance(), &ctx.GetExchangeManager(), delegate,
                                   chip::app::ReadClient::InteractionType::Read);
        System::PacketBufferHandle msgBuf;
        ReadRequestMessage::Builder request;
        System::PacketBufferTLVWriter writer;

        chip::app::InitWriterWithSpaceReserved(writer, 0);
        err = request.Init(&writer);
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
        NL_TEST_ASSERT(apSuite, request.EndOfReadRequestMessage() == CHIP_NO_ERROR);
        err = writer.Finalize(&msgBuf);
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
        auto exchange = readClient.mpExchangeMgr->NewContext(readPrepareParams.mSessionHolder.Get().Value(), &readClient);
        NL_TEST_ASSERT(apSuite, exchange != nullptr);
        readClient.mExchange.Grab(exchange);
        readClient.MoveToState(app::ReadClient::ClientState::AwaitingInitialReport);
        err = readClient.mExchange->SendMessage(Protocols::InteractionModel::MsgType::ReadRequest, std::move(msgBuf),
                                                Messaging::SendFlags(Messaging::SendMessageFlags::kExpectResponse));
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
        ctx.DrainAndServiceIO();
        ChipLogError(DataManagement, "The error is %s", ErrorStr(delegate.mError));
        NL_TEST_ASSERT(apSuite, delegate.mError == CHIP_IM_GLOBAL_STATUS(InvalidAction));
    }
    NL_TEST_ASSERT(apSuite, engine->GetNumActiveReadClients() == 0);
    engine->Shutdown();
    NL_TEST_ASSERT(apSuite, ctx.GetExchangeManager().GetNumActiveExchanges() == 0);
}

// Read Client creates a subscription with the server, server sends chunked reports, after the handler sends out the first chunked
// report, client sends out invalid write request message, handler sends status report with invalid action and closes
void TestReadInteraction::TestSubscribeSendUnknownMessage(nlTestSuite * apSuite, void * apContext)
{
    TestContext & ctx = *static_cast<TestContext *>(apContext);
    CHIP_ERROR err    = CHIP_NO_ERROR;

    Messaging::ReliableMessageMgr * rm = ctx.GetExchangeManager().GetReliableMessageMgr();
    // Shouldn't have anything in the retransmit table when starting the test.
    NL_TEST_ASSERT(apSuite, rm->TestGetCountRetransTable() == 0);

    MockInteractionModelApp delegate;
    auto * engine = chip::app::InteractionModelEngine::GetInstance();
    err           = engine->Init(&ctx.GetExchangeManager(), &ctx.GetFabricTable(), app::reporting::GetDefaultReportScheduler());
    NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

    chip::app::AttributePathParams attributePathParams[1];
    // Mock Attribute 4 is a big attribute, with 6 large OCTET_STRING
    attributePathParams[0].mEndpointId  = Test::kMockEndpoint3;
    attributePathParams[0].mClusterId   = Test::MockClusterId(2);
    attributePathParams[0].mAttributeId = Test::MockAttributeId(4);

    ReadPrepareParams readPrepareParams(ctx.GetSessionBobToAlice());
    readPrepareParams.mpAttributePathParamsList    = attributePathParams;
    readPrepareParams.mAttributePathParamsListSize = 1;

    {
        app::ReadClient readClient(chip::app::InteractionModelEngine::GetInstance(), &ctx.GetExchangeManager(), delegate,
                                   chip::app::ReadClient::InteractionType::Subscribe);

        ctx.GetLoopback().mSentMessageCount                 = 0;
        ctx.GetLoopback().mNumMessagesToDrop                = 1;
        ctx.GetLoopback().mNumMessagesToAllowBeforeDropping = 1;
        ctx.GetLoopback().mDroppedMessageCount              = 0;
        err                                                 = readClient.SendRequest(readPrepareParams);
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
        ctx.DrainAndServiceIO();

        // Since we are dropping packets, things are not getting acked.  Set up
        // our MRP state to look like what it would have looked like if the
        // packet had not gotten dropped.
        PretendWeGotReplyFromServer(apSuite, ctx, readClient.mExchange.Get());

        NL_TEST_ASSERT(apSuite, ctx.GetLoopback().mSentMessageCount == 2);
        NL_TEST_ASSERT(apSuite, ctx.GetLoopback().mDroppedMessageCount == 1);
        NL_TEST_ASSERT(apSuite, engine->GetNumActiveReadHandlers() == 1);
        NL_TEST_ASSERT(apSuite, engine->ActiveHandlerAt(0) != nullptr);

        ctx.GetLoopback().mSentMessageCount = 0;

        // Server sends out status report, client should send status report along with Piggybacking ack, but we don't do that
        // Instead, we send out unknown message to server

        System::PacketBufferHandle msgBuf;
        ReadRequestMessage::Builder request;
        System::PacketBufferTLVWriter writer;
        chip::app::InitWriterWithSpaceReserved(writer, 0);
        request.Init(&writer);
        writer.Finalize(&msgBuf);

        err = readClient.mExchange->SendMessage(Protocols::InteractionModel::MsgType::WriteRequest, std::move(msgBuf));
        ctx.DrainAndServiceIO();
        // client sends invalid write request, server sends out status report with invalid action and closes, client replies with
        // status report server replies with MRP Ack
        NL_TEST_ASSERT(apSuite, ctx.GetLoopback().mSentMessageCount == 4);
        NL_TEST_ASSERT(apSuite, engine->GetNumActiveReadHandlers() == 0);
    }

    NL_TEST_ASSERT(apSuite, engine->GetNumActiveReadClients() == 0);
    engine->Shutdown();
    ctx.ExpireSessionAliceToBob();
    ctx.ExpireSessionBobToAlice();
    ctx.CreateSessionAliceToBob();
    ctx.CreateSessionBobToAlice();
}

// Read Client creates a subscription with the server, server sends chunked reports, after the handler sends out invalid status
// report, client sends out invalid status report message, handler sends status report with invalid action and close
void TestReadInteraction::TestSubscribeSendInvalidStatusReport(nlTestSuite * apSuite, void * apContext)
{
    TestContext & ctx = *static_cast<TestContext *>(apContext);
    CHIP_ERROR err    = CHIP_NO_ERROR;

    Messaging::ReliableMessageMgr * rm = ctx.GetExchangeManager().GetReliableMessageMgr();
    // Shouldn't have anything in the retransmit table when starting the test.
    NL_TEST_ASSERT(apSuite, rm->TestGetCountRetransTable() == 0);

    MockInteractionModelApp delegate;
    auto * engine = chip::app::InteractionModelEngine::GetInstance();
    err           = engine->Init(&ctx.GetExchangeManager(), &ctx.GetFabricTable(), app::reporting::GetDefaultReportScheduler());
    NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

    chip::app::AttributePathParams attributePathParams[1];
    // Mock Attribute 4 is a big attribute, with 6 large OCTET_STRING
    attributePathParams[0].mEndpointId  = Test::kMockEndpoint3;
    attributePathParams[0].mClusterId   = Test::MockClusterId(2);
    attributePathParams[0].mAttributeId = Test::MockAttributeId(4);

    ReadPrepareParams readPrepareParams(ctx.GetSessionBobToAlice());
    readPrepareParams.mpAttributePathParamsList    = attributePathParams;
    readPrepareParams.mAttributePathParamsListSize = 1;

    {
        app::ReadClient readClient(chip::app::InteractionModelEngine::GetInstance(), &ctx.GetExchangeManager(), delegate,
                                   chip::app::ReadClient::InteractionType::Subscribe);

        ctx.GetLoopback().mSentMessageCount                 = 0;
        ctx.GetLoopback().mNumMessagesToDrop                = 1;
        ctx.GetLoopback().mNumMessagesToAllowBeforeDropping = 1;
        ctx.GetLoopback().mDroppedMessageCount              = 0;

        err = readClient.SendRequest(readPrepareParams);
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
        ctx.DrainAndServiceIO();

        // Since we are dropping packets, things are not getting acked.  Set up
        // our MRP state to look like what it would have looked like if the
        // packet had not gotten dropped.
        PretendWeGotReplyFromServer(apSuite, ctx, readClient.mExchange.Get());

        NL_TEST_ASSERT(apSuite, ctx.GetLoopback().mSentMessageCount == 2);
        NL_TEST_ASSERT(apSuite, ctx.GetLoopback().mDroppedMessageCount == 1);
        ctx.GetLoopback().mSentMessageCount = 0;

        NL_TEST_ASSERT(apSuite, engine->GetNumActiveReadHandlers() == 1);
        NL_TEST_ASSERT(apSuite, engine->ActiveHandlerAt(0) != nullptr);

        System::PacketBufferHandle msgBuf;
        StatusResponseMessage::Builder request;
        System::PacketBufferTLVWriter writer;
        chip::app::InitWriterWithSpaceReserved(writer, 0);
        request.Init(&writer);
        writer.Finalize(&msgBuf);

        err = readClient.mExchange->SendMessage(Protocols::InteractionModel::MsgType::StatusResponse, std::move(msgBuf));
        ctx.DrainAndServiceIO();

        // client sends malformed status response, server sends out status report with invalid action and close, client replies with
        // status report server replies with MRP Ack
        NL_TEST_ASSERT(apSuite, ctx.GetLoopback().mSentMessageCount == 4);
        NL_TEST_ASSERT(apSuite, engine->GetNumActiveReadHandlers() == 0);
    }

    NL_TEST_ASSERT(apSuite, engine->GetNumActiveReadClients() == 0);
    engine->Shutdown();
    ctx.ExpireSessionAliceToBob();
    ctx.ExpireSessionBobToAlice();
    ctx.CreateSessionAliceToBob();
    ctx.CreateSessionBobToAlice();
}

// Read Client sends a malformed subscribe request, the server fails to parse the request and generates a status report to the
// client, and client closes itself.
void TestReadInteraction::TestReadHandlerInvalidSubscribeRequest(nlTestSuite * apSuite, void * apContext)
{
    TestContext & ctx = *static_cast<TestContext *>(apContext);
    CHIP_ERROR err    = CHIP_NO_ERROR;

    Messaging::ReliableMessageMgr * rm = ctx.GetExchangeManager().GetReliableMessageMgr();
    // Shouldn't have anything in the retransmit table when starting the test.
    NL_TEST_ASSERT(apSuite, rm->TestGetCountRetransTable() == 0);

    MockInteractionModelApp delegate;
    auto * engine = chip::app::InteractionModelEngine::GetInstance();
    err           = engine->Init(&ctx.GetExchangeManager(), &ctx.GetFabricTable(), app::reporting::GetDefaultReportScheduler());
    NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

    ReadPrepareParams readPrepareParams(ctx.GetSessionBobToAlice());

    {
        app::ReadClient readClient(chip::app::InteractionModelEngine::GetInstance(), &ctx.GetExchangeManager(), delegate,
                                   chip::app::ReadClient::InteractionType::Subscribe);
        System::PacketBufferHandle msgBuf;
        ReadRequestMessage::Builder request;
        System::PacketBufferTLVWriter writer;

        chip::app::InitWriterWithSpaceReserved(writer, 0);
        err = request.Init(&writer);
        err = writer.Finalize(&msgBuf);

        auto exchange = readClient.mpExchangeMgr->NewContext(readPrepareParams.mSessionHolder.Get().Value(), &readClient);
        NL_TEST_ASSERT(apSuite, exchange != nullptr);
        readClient.mExchange.Grab(exchange);
        readClient.MoveToState(app::ReadClient::ClientState::AwaitingInitialReport);
        err = readClient.mExchange->SendMessage(Protocols::InteractionModel::MsgType::SubscribeRequest, std::move(msgBuf),
                                                Messaging::SendFlags(Messaging::SendMessageFlags::kExpectResponse));
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
        ctx.DrainAndServiceIO();
        NL_TEST_ASSERT(apSuite, delegate.mError == CHIP_IM_GLOBAL_STATUS(InvalidAction));
    }
    NL_TEST_ASSERT(apSuite, engine->GetNumActiveReadClients() == 0);
    engine->Shutdown();
    NL_TEST_ASSERT(apSuite, ctx.GetExchangeManager().GetNumActiveExchanges() == 0);
}

// Create the subscription, then remove the corresponding fabric in client and handler, the corresponding
// client and handler would be released as well.
void TestReadInteraction::TestSubscribeInvalidateFabric(nlTestSuite * apSuite, void * apContext)
{
    TestContext & ctx = *static_cast<TestContext *>(apContext);
    CHIP_ERROR err    = CHIP_NO_ERROR;

    Messaging::ReliableMessageMgr * rm = ctx.GetExchangeManager().GetReliableMessageMgr();
    // Shouldn't have anything in the retransmit table when starting the test.
    NL_TEST_ASSERT(apSuite, rm->TestGetCountRetransTable() == 0);

    GenerateEvents(apSuite, apContext);

    MockInteractionModelApp delegate;
    auto * engine = chip::app::InteractionModelEngine::GetInstance();
    err           = engine->Init(&ctx.GetExchangeManager(), &ctx.GetFabricTable(), app::reporting::GetDefaultReportScheduler());
    NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

    ReadPrepareParams readPrepareParams(ctx.GetSessionBobToAlice());
    readPrepareParams.mpAttributePathParamsList    = new chip::app::AttributePathParams[1];
    readPrepareParams.mAttributePathParamsListSize = 1;

    readPrepareParams.mpAttributePathParamsList[0].mEndpointId  = Test::kMockEndpoint3;
    readPrepareParams.mpAttributePathParamsList[0].mClusterId   = Test::MockClusterId(2);
    readPrepareParams.mpAttributePathParamsList[0].mAttributeId = Test::MockAttributeId(1);

    readPrepareParams.mMinIntervalFloorSeconds   = 0;
    readPrepareParams.mMaxIntervalCeilingSeconds = 0;

    {
        app::ReadClient readClient(chip::app::InteractionModelEngine::GetInstance(), &ctx.GetExchangeManager(), delegate,
                                   chip::app::ReadClient::InteractionType::Subscribe);

        delegate.mGotReport = false;

        err = readClient.SendAutoResubscribeRequest(std::move(readPrepareParams));
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

        ctx.DrainAndServiceIO();

        NL_TEST_ASSERT(apSuite, delegate.mGotReport);
        NL_TEST_ASSERT(apSuite, engine->GetNumActiveReadHandlers(ReadHandler::InteractionType::Subscribe) == 1);
        NL_TEST_ASSERT(apSuite, engine->ActiveHandlerAt(0) != nullptr);
        delegate.mpReadHandler = engine->ActiveHandlerAt(0);

        ctx.GetFabricTable().Delete(ctx.GetAliceFabricIndex());
        NL_TEST_ASSERT(apSuite, engine->GetNumActiveReadHandlers(ReadHandler::InteractionType::Subscribe) == 0);
        ctx.GetFabricTable().Delete(ctx.GetBobFabricIndex());
        NL_TEST_ASSERT(apSuite, delegate.mError == CHIP_ERROR_IM_FABRIC_DELETED);
        ctx.ExpireSessionAliceToBob();
        ctx.ExpireSessionBobToAlice();
        ctx.CreateAliceFabric();
        ctx.CreateBobFabric();
        ctx.CreateSessionAliceToBob();
        ctx.CreateSessionBobToAlice();
    }
    NL_TEST_ASSERT(apSuite, engine->GetNumActiveReadClients() == 0);
    engine->Shutdown();
    NL_TEST_ASSERT(apSuite, ctx.GetExchangeManager().GetNumActiveExchanges() == 0);
}

void TestReadInteraction::TestShutdownSubscription(nlTestSuite * apSuite, void * apContext)
{
    TestContext & ctx = *static_cast<TestContext *>(apContext);
    CHIP_ERROR err    = CHIP_NO_ERROR;

    Messaging::ReliableMessageMgr * rm = ctx.GetExchangeManager().GetReliableMessageMgr();
    // Shouldn't have anything in the retransmit table when starting the test.
    NL_TEST_ASSERT(apSuite, rm->TestGetCountRetransTable() == 0);

    GenerateEvents(apSuite, apContext);

    MockInteractionModelApp delegate;
    auto * engine = chip::app::InteractionModelEngine::GetInstance();
    err           = engine->Init(&ctx.GetExchangeManager(), &ctx.GetFabricTable(), app::reporting::GetDefaultReportScheduler());
    NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

    ReadPrepareParams readPrepareParams(ctx.GetSessionBobToAlice());
    readPrepareParams.mpAttributePathParamsList    = new chip::app::AttributePathParams[1];
    readPrepareParams.mAttributePathParamsListSize = 1;

    readPrepareParams.mpAttributePathParamsList[0].mEndpointId  = Test::kMockEndpoint3;
    readPrepareParams.mpAttributePathParamsList[0].mClusterId   = Test::MockClusterId(2);
    readPrepareParams.mpAttributePathParamsList[0].mAttributeId = Test::MockAttributeId(1);

    readPrepareParams.mMinIntervalFloorSeconds   = 0;
    readPrepareParams.mMaxIntervalCeilingSeconds = 0;

    {
        app::ReadClient readClient(chip::app::InteractionModelEngine::GetInstance(), &ctx.GetExchangeManager(), delegate,
                                   chip::app::ReadClient::InteractionType::Subscribe);

        delegate.mGotReport = false;

        err = readClient.SendAutoResubscribeRequest(std::move(readPrepareParams));
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

        ctx.DrainAndServiceIO();

        NL_TEST_ASSERT(apSuite, delegate.mGotReport);
        NL_TEST_ASSERT(apSuite, engine->GetNumActiveReadHandlers(ReadHandler::InteractionType::Subscribe) == 1);

        engine->ShutdownSubscription(chip::ScopedNodeId(readClient.GetPeerNodeId(), readClient.GetFabricIndex()),
                                     readClient.GetSubscriptionId().Value());
        NL_TEST_ASSERT(apSuite, readClient.IsIdle());
    }
    engine->Shutdown();
    NL_TEST_ASSERT(apSuite, engine->GetNumActiveReadClients() == 0);
    NL_TEST_ASSERT(apSuite, ctx.GetExchangeManager().GetNumActiveExchanges() == 0);
}

/**
 * Tests what happens when a subscription tries to deliver reports but the
 * session it has is defunct.  Makes sure we correctly tear down the ReadHandler
 * and don't increment the "reports in flight" count.
 */
void TestReadInteraction::TestSubscriptionReportWithDefunctSession(nlTestSuite * apSuite, void * apContext)
{
    TestContext & ctx = *static_cast<TestContext *>(apContext);
    CHIP_ERROR err    = CHIP_NO_ERROR;

    Messaging::ReliableMessageMgr * rm = ctx.GetExchangeManager().GetReliableMessageMgr();
    // Shouldn't have anything in the retransmit table when starting the test.
    NL_TEST_ASSERT(apSuite, rm->TestGetCountRetransTable() == 0);

    MockInteractionModelApp delegate;
    ReportSchedulerImpl * reportScheduler = app::reporting::GetDefaultReportScheduler();
    auto * engine                         = chip::app::InteractionModelEngine::GetInstance();
    err                                   = engine->Init(&ctx.GetExchangeManager(), &ctx.GetFabricTable(), reportScheduler);
    NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

    AttributePathParams subscribePath(Test::kMockEndpoint3, Test::MockClusterId(2), Test::MockAttributeId(1));

    ReadPrepareParams readPrepareParams(ctx.GetSessionBobToAlice());
    readPrepareParams.mpAttributePathParamsList    = &subscribePath;
    readPrepareParams.mAttributePathParamsListSize = 1;

    readPrepareParams.mMinIntervalFloorSeconds   = 0;
    readPrepareParams.mMaxIntervalCeilingSeconds = 0;

    {
        app::ReadClient readClient(chip::app::InteractionModelEngine::GetInstance(), &ctx.GetExchangeManager(), delegate,
                                   chip::app::ReadClient::InteractionType::Subscribe);

        delegate.mGotReport = false;

        err = readClient.SendSubscribeRequest(std::move(readPrepareParams));
        NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);

        ctx.DrainAndServiceIO();

        NL_TEST_ASSERT(apSuite, delegate.mGotReport);
        NL_TEST_ASSERT(apSuite, delegate.mNumAttributeResponse == 1);
        NL_TEST_ASSERT(apSuite, engine->GetNumActiveReadHandlers(ReadHandler::InteractionType::Subscribe) == 1);
        NL_TEST_ASSERT(apSuite, engine->GetNumActiveReadHandlers(ReadHandler::InteractionType::Read) == 0);
        NL_TEST_ASSERT(apSuite, engine->GetReportingEngine().GetNumReportsInFlight() == 0);

        NL_TEST_ASSERT(apSuite, engine->ActiveHandlerAt(0) != nullptr);
        auto * readHandler = engine->ActiveHandlerAt(0);

        // Verify that the session we will reset later is the one we will mess
        // with now.
        NL_TEST_ASSERT(apSuite, SessionHandle(*readHandler->GetSession()) == ctx.GetSessionAliceToBob());

        // Test that we send reports as needed.
        delegate.mGotReport            = false;
        delegate.mNumAttributeResponse = 0;
        engine->GetReportingEngine().SetDirty(subscribePath);
        ctx.DrainAndServiceIO();

        NL_TEST_ASSERT(apSuite, delegate.mGotReport);
        NL_TEST_ASSERT(apSuite, delegate.mNumAttributeResponse == 1);
        NL_TEST_ASSERT(apSuite, engine->GetNumActiveReadHandlers(ReadHandler::InteractionType::Subscribe) == 1);
        NL_TEST_ASSERT(apSuite, engine->GetNumActiveReadHandlers(ReadHandler::InteractionType::Read) == 0);
        NL_TEST_ASSERT(apSuite, engine->GetReportingEngine().GetNumReportsInFlight() == 0);

        // Test that if the session is defunct we don't send reports and clean
        // up properly.
        readHandler->GetSession()->MarkAsDefunct();
        delegate.mGotReport            = false;
        delegate.mNumAttributeResponse = 0;
        engine->GetReportingEngine().SetDirty(subscribePath);

        ctx.DrainAndServiceIO();

        NL_TEST_ASSERT(apSuite, !delegate.mGotReport);
        NL_TEST_ASSERT(apSuite, delegate.mNumAttributeResponse == 0);
        NL_TEST_ASSERT(apSuite, engine->GetNumActiveReadHandlers(ReadHandler::InteractionType::Subscribe) == 0);
        NL_TEST_ASSERT(apSuite, engine->GetNumActiveReadHandlers(ReadHandler::InteractionType::Read) == 0);
        NL_TEST_ASSERT(apSuite, engine->GetReportingEngine().GetNumReportsInFlight() == 0);
    }
    engine->Shutdown();
    NL_TEST_ASSERT(apSuite, engine->GetNumActiveReadClients() == 0);
    NL_TEST_ASSERT(apSuite, ctx.GetExchangeManager().GetNumActiveExchanges() == 0);

    // Get rid of our defunct session.
    ctx.ExpireSessionAliceToBob();
    ctx.CreateSessionAliceToBob();
}

} // namespace app
} // namespace chip

namespace {

/**
 *   Test Suite. It lists all the test functions.
 */

// clang-format off
const nlTest sTests[] =
{
    NL_TEST_DEF("TestReadRoundtrip", chip::app::TestReadInteraction::TestReadRoundtrip),
    NL_TEST_DEF("TestReadRoundtripWithDataVersionFilter", chip::app::TestReadInteraction::TestReadRoundtripWithDataVersionFilter),
    NL_TEST_DEF("TestReadRoundtripWithNoMatchPathDataVersionFilter", chip::app::TestReadInteraction::TestReadRoundtripWithNoMatchPathDataVersionFilter),
    NL_TEST_DEF("TestReadRoundtripWithMultiSamePathDifferentDataVersionFilter", chip::app::TestReadInteraction::TestReadRoundtripWithMultiSamePathDifferentDataVersionFilter),
    NL_TEST_DEF("TestReadRoundtripWithSameDifferentPathsDataVersionFilter", chip::app::TestReadInteraction::TestReadRoundtripWithSameDifferentPathsDataVersionFilter),
    NL_TEST_DEF("TestReadWildcard", chip::app::TestReadInteraction::TestReadWildcard),
    NL_TEST_DEF("TestReadChunking", chip::app::TestReadInteraction::TestReadChunking),
    NL_TEST_DEF("TestSetDirtyBetweenChunks", chip::app::TestReadInteraction::TestSetDirtyBetweenChunks),
    NL_TEST_DEF("CheckReadClient", chip::app::TestReadInteraction::TestReadClient),
    NL_TEST_DEF("TestReadUnexpectedSubscriptionId", chip::app::TestReadInteraction::TestReadUnexpectedSubscriptionId),
    NL_TEST_DEF("CheckReadHandler", chip::app::TestReadInteraction::TestReadHandler),
    NL_TEST_DEF("TestReadClientGenerateAttributePathList", chip::app::TestReadInteraction::TestReadClientGenerateAttributePathList),
    NL_TEST_DEF("TestReadClientGenerateInvalidAttributePathList", chip::app::TestReadInteraction::TestReadClientGenerateInvalidAttributePathList),
    NL_TEST_DEF("TestReadClientGenerateOneEventPaths", chip::app::TestReadInteraction::TestReadClientGenerateOneEventPaths),
    NL_TEST_DEF("TestReadClientGenerateTwoEventPaths", chip::app::TestReadInteraction::TestReadClientGenerateTwoEventPaths),
    NL_TEST_DEF("TestReadClientInvalidReport", chip::app::TestReadInteraction::TestReadClientInvalidReport),
    NL_TEST_DEF("TestReadHandlerInvalidAttributePath", chip::app::TestReadInteraction::TestReadHandlerInvalidAttributePath),
    NL_TEST_DEF("TestProcessSubscribeRequest", chip::app::TestReadInteraction::TestProcessSubscribeRequest),
    /*
        We need to figure out a way to run unit tests with an ICD build without affecting
        all the standard unit tests
        https://github.com/project-chip/connectedhomeip/issues/28446
    */
#if CHIP_CONFIG_ENABLE_ICD_SERVER
    NL_TEST_DEF("TestICDProcessSubscribeRequestSupMaxIntervalCeiling", chip::app::TestReadInteraction::TestICDProcessSubscribeRequestSupMaxIntervalCeiling),
    NL_TEST_DEF("TestICDProcessSubscribeRequestInfMaxIntervalCeiling", chip::app::TestReadInteraction::TestICDProcessSubscribeRequestInfMaxIntervalCeiling),
    NL_TEST_DEF("TestICDProcessSubscribeRequestSupMinInterval", chip::app::TestReadInteraction::TestICDProcessSubscribeRequestSupMinInterval),
    NL_TEST_DEF("TestICDProcessSubscribeRequestMaxMinInterval", chip::app::TestReadInteraction::TestICDProcessSubscribeRequestMaxMinInterval),
    NL_TEST_DEF("TestICDProcessSubscribeRequestInvalidIdleModeInterval", chip::app::TestReadInteraction::TestICDProcessSubscribeRequestInvalidIdleModeInterval),
#endif // #if CHIP_CONFIG_ENABLE_ICD_SERVER
    NL_TEST_DEF("TestSubscribeRoundtrip", chip::app::TestReadInteraction::TestSubscribeRoundtrip),
    NL_TEST_DEF("TestPostSubscribeRoundtripChunkReport", chip::app::TestReadInteraction::TestPostSubscribeRoundtripChunkReport),
    NL_TEST_DEF("TestReadClientReceiveInvalidMessage", chip::app::TestReadInteraction::TestReadClientReceiveInvalidMessage),
    NL_TEST_DEF("TestSubscribeClientReceiveInvalidStatusResponse", chip::app::TestReadInteraction::TestSubscribeClientReceiveInvalidStatusResponse),
    NL_TEST_DEF("TestSubscribeClientReceiveWellFormedStatusResponse", chip::app::TestReadInteraction::TestSubscribeClientReceiveWellFormedStatusResponse),
    NL_TEST_DEF("TestSubscribeClientReceiveInvalidReportMessage", chip::app::TestReadInteraction::TestSubscribeClientReceiveInvalidReportMessage),
    NL_TEST_DEF("TestSubscribeClientReceiveUnsolicitedInvalidReportMessage", chip::app::TestReadInteraction::TestSubscribeClientReceiveUnsolicitedInvalidReportMessage),
    NL_TEST_DEF("TestSubscribeClientReceiveInvalidSubscribeResponseMessage", chip::app::TestReadInteraction::TestSubscribeClientReceiveInvalidSubscribeResponseMessage),
    NL_TEST_DEF("TestSubscribeClientReceiveUnsolicitedReportMessageWithInvalidSubscriptionId", chip::app::TestReadInteraction::TestSubscribeClientReceiveUnsolicitedReportMessageWithInvalidSubscriptionId),
    NL_TEST_DEF("TestReadChunkingInvalidSubscriptionId", chip::app::TestReadInteraction::TestReadChunkingInvalidSubscriptionId),
    NL_TEST_DEF("TestReadHandlerMalformedReadRequest1", chip::app::TestReadInteraction::TestReadHandlerMalformedReadRequest1),
    NL_TEST_DEF("TestReadHandlerMalformedReadRequest2", chip::app::TestReadInteraction::TestReadHandlerMalformedReadRequest2),
    NL_TEST_DEF("TestReadHandlerMalformedSubscribeRequest", chip::app::TestReadInteraction::TestReadHandlerMalformedSubscribeRequest),
    NL_TEST_DEF("TestSubscribeSendUnknownMessage", chip::app::TestReadInteraction::TestSubscribeSendUnknownMessage),
    NL_TEST_DEF("TestSubscribeSendInvalidStatusReport", chip::app::TestReadInteraction::TestSubscribeSendInvalidStatusReport),
    NL_TEST_DEF("TestReadHandlerInvalidSubscribeRequest", chip::app::TestReadInteraction::TestReadHandlerInvalidSubscribeRequest),
    NL_TEST_DEF("TestSubscribeInvalidateFabric", chip::app::TestReadInteraction::TestSubscribeInvalidateFabric),
    NL_TEST_DEF("TestShutdownSubscription", chip::app::TestReadInteraction::TestShutdownSubscription),
    /*
        Disable test when running the ICD specific unit tests.
        Test tests reporting feature with hard coded time jumps which don't take into account that an ICD
        can change the requested MaxInterval during the subscription response / request process
        https://github.com/project-chip/connectedhomeip/issues/28419
    */
#if CHIP_CONFIG_ENABLE_ICD_SERVER != 1
    NL_TEST_DEF("TestSubscribeUrgentWildcardEvent", chip::app::TestReadInteraction::TestSubscribeUrgentWildcardEvent),
#endif
    NL_TEST_DEF("TestSubscribeWildcard", chip::app::TestReadInteraction::TestSubscribeWildcard),
    NL_TEST_DEF("TestSubscribePartialOverlap", chip::app::TestReadInteraction::TestSubscribePartialOverlap),
    NL_TEST_DEF("TestSubscribeSetDirtyFullyOverlap", chip::app::TestReadInteraction::TestSubscribeSetDirtyFullyOverlap),
    NL_TEST_DEF("TestSubscribeEarlyShutdown", chip::app::TestReadInteraction::TestSubscribeEarlyShutdown),
    NL_TEST_DEF("TestSubscribeInvalidAttributePathRoundtrip", chip::app::TestReadInteraction::TestSubscribeInvalidAttributePathRoundtrip),
    NL_TEST_DEF("TestReadInvalidAttributePathRoundtrip", chip::app::TestReadInteraction::TestReadInvalidAttributePathRoundtrip),
    NL_TEST_DEF("TestSubscribeInvalidInterval", chip::app::TestReadInteraction::TestSubscribeInvalidInterval),
    NL_TEST_DEF("TestSubscribeRoundtripStatusReportTimeout", chip::app::TestReadInteraction::TestSubscribeRoundtripStatusReportTimeout),
    NL_TEST_DEF("TestPostSubscribeRoundtripStatusReportTimeout", chip::app::TestReadInteraction::TestPostSubscribeRoundtripStatusReportTimeout),
    NL_TEST_DEF("TestReadChunkingStatusReportTimeout", chip::app::TestReadInteraction::TestReadChunkingStatusReportTimeout),
    NL_TEST_DEF("TestReadReportFailure", chip::app::TestReadInteraction::TestReadReportFailure),
    NL_TEST_DEF("TestSubscribeRoundtripChunkStatusReportTimeout", chip::app::TestReadInteraction::TestSubscribeRoundtripChunkStatusReportTimeout),
    NL_TEST_DEF("TestPostSubscribeRoundtripChunkStatusReportTimeout", chip::app::TestReadInteraction::TestPostSubscribeRoundtripChunkStatusReportTimeout),
    NL_TEST_DEF("TestPostSubscribeRoundtripChunkReportTimeout", chip::app::TestReadInteraction::TestPostSubscribeRoundtripChunkReportTimeout),
    NL_TEST_DEF("TestReadShutdown", chip::app::TestReadInteraction::TestReadShutdown),
    NL_TEST_DEF("TestSubscriptionReportWithDefunctSession", chip::app::TestReadInteraction::TestSubscriptionReportWithDefunctSession),
    NL_TEST_SENTINEL()
};
// clang-format on

// clang-format off
nlTestSuite sSuite =
{
    "TestReadInteraction",
    &sTests[0],
    TestContext::Initialize,
    TestContext::Finalize
};
// clang-format on

} // namespace

int TestReadInteraction()
{
    return chip::ExecuteTestsWithContext<TestContext>(&sSuite);
}

CHIP_REGISTER_TEST_SUITE(TestReadInteraction)