src/messaging/tests/TestAbortExchangesForFabric.cpp - third_party/github/project-chip/connectedhomeip - Git at Google

 /*
  *    Copyright (c) 2022 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 aborting existing exchanges (except
  *      one) for a fabric.
  */

 #include <lib/support/UnitTestContext.h>
 #include <lib/support/UnitTestRegistration.h>
 #include <lib/support/UnitTestUtils.h>
 #include <messaging/ExchangeContext.h>
 #include <messaging/ExchangeMgr.h>
 #include <messaging/ReliableMessageProtocolConfig.h>
 #include <messaging/tests/MessagingContext.h>
 #include <protocols/echo/Echo.h>
 #include <system/SystemPacketBuffer.h>
 #include <transport/SessionManager.h>

 #if CHIP_CONFIG_ENABLE_ICD_SERVER
 #include <app/icd/server/ICDConfigurationData.h> // nogncheck
 #endif

 namespace {

 using namespace chip;
 using namespace chip::Messaging;
 using namespace chip::System;
 using namespace chip::System::Clock::Literals;
 using namespace chip::Protocols;

 using TestContext = Test::LoopbackMessagingContext;

 class MockAppDelegate : public ExchangeDelegate
 {
 public:
     CHIP_ERROR OnMessageReceived(ExchangeContext * ec, const PayloadHeader & payloadHeader,
                                  System::PacketBufferHandle && buffer) override
     {
         mOnMessageReceivedCalled = true;
         return CHIP_NO_ERROR;
     }

     void OnResponseTimeout(ExchangeContext * ec) override {}

     bool mOnMessageReceivedCalled = false;
 };

 void CommonCheckAbortAllButOneExchange(nlTestSuite * inSuite, TestContext & ctx, bool dropResponseMessages)
 {
     // We want to have two sessions using the same fabric id that we use for
     // creating our exchange contexts.  That lets us test exchanges on the same
     // session as the "special exchange" as well as on other sessions.
     auto & sessionManager = ctx.GetSecureSessionManager();

     // Use key ids that are not going to collide with anything else that ctx is
     // doing.
     // TODO: These should really be CASE sessions...
     SessionHolder session1;
     CHIP_ERROR err = sessionManager.InjectCaseSessionWithTestKey(session1, 100, 101, ctx.GetAliceFabric()->GetNodeId(),
                                                                  ctx.GetBobFabric()->GetNodeId(), ctx.GetAliceFabricIndex(),
                                                                  ctx.GetBobAddress(), CryptoContext::SessionRole::kInitiator, {});

     NL_TEST_ASSERT(inSuite, err == CHIP_NO_ERROR);

     SessionHolder session1Reply;
     err = sessionManager.InjectCaseSessionWithTestKey(session1Reply, 101, 100, ctx.GetBobFabric()->GetNodeId(),
                                                       ctx.GetAliceFabric()->GetNodeId(), ctx.GetBobFabricIndex(),
                                                       ctx.GetAliceAddress(), CryptoContext::SessionRole::kResponder, {});

     NL_TEST_ASSERT(inSuite, err == CHIP_NO_ERROR);

     // TODO: Ideally this would go to a different peer, but we don't have that
     // set up right now: only Alice and Bob have useful node ids and whatnot.
     SessionHolder session2;
     err = sessionManager.InjectCaseSessionWithTestKey(session2, 200, 201, ctx.GetAliceFabric()->GetNodeId(),
                                                       ctx.GetBobFabric()->GetNodeId(), ctx.GetAliceFabricIndex(),
                                                       ctx.GetBobAddress(), CryptoContext::SessionRole::kInitiator, {});

     NL_TEST_ASSERT(inSuite, err == CHIP_NO_ERROR);

     SessionHolder session2Reply;
     err = sessionManager.InjectCaseSessionWithTestKey(session2Reply, 101, 100, ctx.GetBobFabric()->GetNodeId(),
                                                       ctx.GetAliceFabric()->GetNodeId(), ctx.GetBobFabricIndex(),
                                                       ctx.GetAliceAddress(), CryptoContext::SessionRole::kResponder, {});
     NL_TEST_ASSERT(inSuite, err == CHIP_NO_ERROR);

     auto & exchangeMgr = ctx.GetExchangeManager();

     MockAppDelegate delegate;
     Echo::EchoServer server;
     err = server.Init(&exchangeMgr);
     NL_TEST_ASSERT(inSuite, err == CHIP_NO_ERROR);

     auto & loopback = ctx.GetLoopback();

     auto trySendMessage = [&](ExchangeContext * exchange, SendMessageFlags flags) {
         PacketBufferHandle buffer = MessagePacketBuffer::New(0);
         NL_TEST_ASSERT(inSuite, !buffer.IsNull());
         return exchange->SendMessage(Echo::MsgType::EchoRequest, std::move(buffer), flags);
     };

     auto sendAndDropMessage = [&](ExchangeContext * exchange, SendMessageFlags flags) {
         // Send a message on the given exchange with the given flags, make sure
         // it's not delivered.
         loopback.mNumMessagesToDrop   = 1;
         loopback.mDroppedMessageCount = 0;

         err = trySendMessage(exchange, flags);
         NL_TEST_ASSERT(inSuite, err == CHIP_NO_ERROR);

         ctx.DrainAndServiceIO();
         NL_TEST_ASSERT(inSuite, !delegate.mOnMessageReceivedCalled);
         NL_TEST_ASSERT(inSuite, loopback.mDroppedMessageCount == 1);
     };

     ReliableMessageMgr * rm = ctx.GetExchangeManager().GetReliableMessageMgr();

     // We want to test three possible exchange states:
     // 1) Closed but waiting for ack.
     // 2) Waiting for a response.
     // 3) Waiting for a send.
     auto * waitingForAck1 = exchangeMgr.NewContext(session1.Get().Value(), &delegate);
     NL_TEST_ASSERT(inSuite, waitingForAck1 != nullptr);
     sendAndDropMessage(waitingForAck1, SendMessageFlags::kNone);
     NL_TEST_ASSERT(inSuite, rm->TestGetCountRetransTable() == 1);

     auto * waitingForAck2 = exchangeMgr.NewContext(session2.Get().Value(), &delegate);
     NL_TEST_ASSERT(inSuite, waitingForAck2 != nullptr);
     sendAndDropMessage(waitingForAck2, SendMessageFlags::kNone);
     NL_TEST_ASSERT(inSuite, rm->TestGetCountRetransTable() == 2);

     auto * waitingForIncomingMessage1 = exchangeMgr.NewContext(session1.Get().Value(), &delegate);
     NL_TEST_ASSERT(inSuite, waitingForIncomingMessage1 != nullptr);
     sendAndDropMessage(waitingForIncomingMessage1, SendMessageFlags::kExpectResponse);
     NL_TEST_ASSERT(inSuite, rm->TestGetCountRetransTable() == 3);

     auto * waitingForIncomingMessage2 = exchangeMgr.NewContext(session2.Get().Value(), &delegate);
     NL_TEST_ASSERT(inSuite, waitingForIncomingMessage2 != nullptr);
     sendAndDropMessage(waitingForIncomingMessage2, SendMessageFlags::kExpectResponse);
     NL_TEST_ASSERT(inSuite, rm->TestGetCountRetransTable() == 4);

     auto * waitingForSend1 = exchangeMgr.NewContext(session1.Get().Value(), &delegate);
     NL_TEST_ASSERT(inSuite, waitingForSend1 != nullptr);
     waitingForSend1->WillSendMessage();

     auto * waitingForSend2 = exchangeMgr.NewContext(session2.Get().Value(), &delegate);
     NL_TEST_ASSERT(inSuite, waitingForSend2 != nullptr);
     waitingForSend2->WillSendMessage();

     // Grab handles to our sessions now, before we evict things.
     const auto & sessionHandle1 = session1.Get();
     const auto & sessionHandle2 = session2.Get();

     session1->AsSecureSession()->SetRemoteSessionParameters(ReliableMessageProtocolConfig(
         Test::MessagingContext::kResponsiveIdleRetransTimeout, Test::MessagingContext::kResponsiveActiveRetransTimeout));

     session1Reply->AsSecureSession()->SetRemoteSessionParameters(ReliableMessageProtocolConfig(
         Test::MessagingContext::kResponsiveIdleRetransTimeout, Test::MessagingContext::kResponsiveActiveRetransTimeout));

     NL_TEST_ASSERT(inSuite, session1);
     NL_TEST_ASSERT(inSuite, session2);
     auto * specialExhange = exchangeMgr.NewContext(session1.Get().Value(), &delegate);
     specialExhange->AbortAllOtherCommunicationOnFabric();

     NL_TEST_ASSERT(inSuite, rm->TestGetCountRetransTable() == 0);
     NL_TEST_ASSERT(inSuite, !session1);
     NL_TEST_ASSERT(inSuite, !session2);

     NL_TEST_ASSERT(inSuite, exchangeMgr.NewContext(sessionHandle1.Value(), &delegate) == nullptr);
     NL_TEST_ASSERT(inSuite, exchangeMgr.NewContext(sessionHandle2.Value(), &delegate) == nullptr);

     // Make sure we can't send messages on any of the other exchanges.
     NL_TEST_ASSERT(inSuite, trySendMessage(waitingForSend1, SendMessageFlags::kExpectResponse) != CHIP_NO_ERROR);
     NL_TEST_ASSERT(inSuite, trySendMessage(waitingForSend2, SendMessageFlags::kExpectResponse) != CHIP_NO_ERROR);

     // Make sure we can send a message on the special exchange.
     NL_TEST_ASSERT(inSuite, !delegate.mOnMessageReceivedCalled);
     err = trySendMessage(specialExhange, SendMessageFlags::kNone);
     NL_TEST_ASSERT(inSuite, err == CHIP_NO_ERROR);
     // Should be waiting for an ack now.
     NL_TEST_ASSERT(inSuite, rm->TestGetCountRetransTable() == 1);

     if (dropResponseMessages)
     {
         //
         // This version of the test allows us to validate logic that marks expired sessions as defunct
         // on encountering an MRP failure.
         //
         loopback.mNumMessagesToDrop   = Test::LoopbackTransport::kUnlimitedMessageCount;
         loopback.mDroppedMessageCount = 0;

         //
         // We've set the session into responsive mode by altering the MRP intervals, so we should be able to
         // trigger a MRP failure due to timing out waiting for an ACK.
         //
         auto waitTimeout = System::Clock::Milliseconds32(1000);

 #if CHIP_CONFIG_ENABLE_ICD_SERVER == 1
         // If running as an ICD, increase waitTimeout to account for the polling interval
         waitTimeout += ICDConfigurationData::GetInstance().GetSlowPollingInterval();
 #endif

         // Account for the retry delay booster, so that we do not timeout our IO processing before the
         // retransmission failure is triggered.
         waitTimeout += CHIP_CONFIG_RMP_DEFAULT_MAX_RETRANS * CHIP_CONFIG_MRP_RETRY_INTERVAL_SENDER_BOOST;

         ctx.GetIOContext().DriveIOUntil(waitTimeout, [&]() { return false; });
     }
     else
     {
         ctx.DrainAndServiceIO();
     }

     // Should not get an app-level response, since we are not expecting one.
     NL_TEST_ASSERT(inSuite, !delegate.mOnMessageReceivedCalled);

     // We should have gotten our ack.
     NL_TEST_ASSERT(inSuite, rm->TestGetCountRetransTable() == 0);

     waitingForSend1->Close();
     waitingForSend2->Close();

     loopback.mNumMessagesToDrop   = 0;
     loopback.mDroppedMessageCount = 0;
 }

 void CheckAbortAllButOneExchange(nlTestSuite * inSuite, void * inContext)
 {
     TestContext & ctx = *reinterpret_cast<TestContext *>(inContext);
     CommonCheckAbortAllButOneExchange(inSuite, ctx, false);
 }

 void CheckAbortAllButOneExchangeResponseTimeout(nlTestSuite * inSuite, void * inContext)
 {
     TestContext & ctx = *reinterpret_cast<TestContext *>(inContext);
     CommonCheckAbortAllButOneExchange(inSuite, ctx, true);
 }

 const nlTest sTests[] = {
     NL_TEST_DEF("Test aborting all but one exchange", CheckAbortAllButOneExchange),
     NL_TEST_DEF("Test aborting all but one exchange + response timeout", CheckAbortAllButOneExchangeResponseTimeout),
     NL_TEST_SENTINEL(),
 };

 // clang-format off
 nlTestSuite sSuite = {
     "Test-AbortExchangesForFabric",
     &sTests[0],
     TestContext::nlTestSetUpTestSuite,
     TestContext::nlTestTearDownTestSuite,
     TestContext::nlTestSetUp,
     TestContext::nlTestTearDown,
 };
 // clang-format on

 } // namespace

 /**
  *  Main
  */
 int TestAbortExchangesForFabric()
 {
     return chip::ExecuteTestsWithContext<TestContext>(&sSuite);
 }

 CHIP_REGISTER_TEST_SUITE(TestAbortExchangesForFabric);
	/*
	* Copyright (c) 2022 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 aborting existing exchanges (except
	* one) for a fabric.
	*/

	#include <lib/support/UnitTestContext.h>
	#include <lib/support/UnitTestRegistration.h>
	#include <lib/support/UnitTestUtils.h>
	#include <messaging/ExchangeContext.h>
	#include <messaging/ExchangeMgr.h>
	#include <messaging/ReliableMessageProtocolConfig.h>
	#include <messaging/tests/MessagingContext.h>
	#include <protocols/echo/Echo.h>
	#include <system/SystemPacketBuffer.h>
	#include <transport/SessionManager.h>

	#if CHIP_CONFIG_ENABLE_ICD_SERVER
	#include <app/icd/server/ICDConfigurationData.h> // nogncheck
	#endif

	namespace {

	using namespace chip;
	using namespace chip::Messaging;
	using namespace chip::System;
	using namespace chip::System::Clock::Literals;
	using namespace chip::Protocols;

	using TestContext = Test::LoopbackMessagingContext;

	class MockAppDelegate : public ExchangeDelegate
	{
	public:
	CHIP_ERROR OnMessageReceived(ExchangeContext * ec, const PayloadHeader & payloadHeader,
	System::PacketBufferHandle && buffer) override
	{
	mOnMessageReceivedCalled = true;
	return CHIP_NO_ERROR;
	}

	void OnResponseTimeout(ExchangeContext * ec) override {}

	bool mOnMessageReceivedCalled = false;
	};

	void CommonCheckAbortAllButOneExchange(nlTestSuite * inSuite, TestContext & ctx, bool dropResponseMessages)
	{
	// We want to have two sessions using the same fabric id that we use for
	// creating our exchange contexts. That lets us test exchanges on the same
	// session as the "special exchange" as well as on other sessions.
	auto & sessionManager = ctx.GetSecureSessionManager();

	// Use key ids that are not going to collide with anything else that ctx is
	// doing.
	// TODO: These should really be CASE sessions...
	SessionHolder session1;
	CHIP_ERROR err = sessionManager.InjectCaseSessionWithTestKey(session1, 100, 101, ctx.GetAliceFabric()->GetNodeId(),
	ctx.GetBobFabric()->GetNodeId(), ctx.GetAliceFabricIndex(),
	ctx.GetBobAddress(), CryptoContext::SessionRole::kInitiator, {});

	NL_TEST_ASSERT(inSuite, err == CHIP_NO_ERROR);

	SessionHolder session1Reply;
	err = sessionManager.InjectCaseSessionWithTestKey(session1Reply, 101, 100, ctx.GetBobFabric()->GetNodeId(),
	ctx.GetAliceFabric()->GetNodeId(), ctx.GetBobFabricIndex(),
	ctx.GetAliceAddress(), CryptoContext::SessionRole::kResponder, {});

	NL_TEST_ASSERT(inSuite, err == CHIP_NO_ERROR);

	// TODO: Ideally this would go to a different peer, but we don't have that
	// set up right now: only Alice and Bob have useful node ids and whatnot.
	SessionHolder session2;
	err = sessionManager.InjectCaseSessionWithTestKey(session2, 200, 201, ctx.GetAliceFabric()->GetNodeId(),
	ctx.GetBobFabric()->GetNodeId(), ctx.GetAliceFabricIndex(),
	ctx.GetBobAddress(), CryptoContext::SessionRole::kInitiator, {});

	NL_TEST_ASSERT(inSuite, err == CHIP_NO_ERROR);

	SessionHolder session2Reply;
	err = sessionManager.InjectCaseSessionWithTestKey(session2Reply, 101, 100, ctx.GetBobFabric()->GetNodeId(),
	ctx.GetAliceFabric()->GetNodeId(), ctx.GetBobFabricIndex(),
	ctx.GetAliceAddress(), CryptoContext::SessionRole::kResponder, {});
	NL_TEST_ASSERT(inSuite, err == CHIP_NO_ERROR);

	auto & exchangeMgr = ctx.GetExchangeManager();

	MockAppDelegate delegate;
	Echo::EchoServer server;
	err = server.Init(&exchangeMgr);
	NL_TEST_ASSERT(inSuite, err == CHIP_NO_ERROR);

	auto & loopback = ctx.GetLoopback();

	auto trySendMessage = [&](ExchangeContext * exchange, SendMessageFlags flags) {
	PacketBufferHandle buffer = MessagePacketBuffer::New(0);
	NL_TEST_ASSERT(inSuite, !buffer.IsNull());
	return exchange->SendMessage(Echo::MsgType::EchoRequest, std::move(buffer), flags);
	};

	auto sendAndDropMessage = [&](ExchangeContext * exchange, SendMessageFlags flags) {
	// Send a message on the given exchange with the given flags, make sure
	// it's not delivered.
	loopback.mNumMessagesToDrop = 1;
	loopback.mDroppedMessageCount = 0;

	err = trySendMessage(exchange, flags);
	NL_TEST_ASSERT(inSuite, err == CHIP_NO_ERROR);

	ctx.DrainAndServiceIO();
	NL_TEST_ASSERT(inSuite, !delegate.mOnMessageReceivedCalled);
	NL_TEST_ASSERT(inSuite, loopback.mDroppedMessageCount == 1);
	};

	ReliableMessageMgr * rm = ctx.GetExchangeManager().GetReliableMessageMgr();

	// We want to test three possible exchange states:
	// 1) Closed but waiting for ack.
	// 2) Waiting for a response.
	// 3) Waiting for a send.
	auto * waitingForAck1 = exchangeMgr.NewContext(session1.Get().Value(), &delegate);
	NL_TEST_ASSERT(inSuite, waitingForAck1 != nullptr);
	sendAndDropMessage(waitingForAck1, SendMessageFlags::kNone);
	NL_TEST_ASSERT(inSuite, rm->TestGetCountRetransTable() == 1);

	auto * waitingForAck2 = exchangeMgr.NewContext(session2.Get().Value(), &delegate);
	NL_TEST_ASSERT(inSuite, waitingForAck2 != nullptr);
	sendAndDropMessage(waitingForAck2, SendMessageFlags::kNone);
	NL_TEST_ASSERT(inSuite, rm->TestGetCountRetransTable() == 2);

	auto * waitingForIncomingMessage1 = exchangeMgr.NewContext(session1.Get().Value(), &delegate);
	NL_TEST_ASSERT(inSuite, waitingForIncomingMessage1 != nullptr);
	sendAndDropMessage(waitingForIncomingMessage1, SendMessageFlags::kExpectResponse);
	NL_TEST_ASSERT(inSuite, rm->TestGetCountRetransTable() == 3);

	auto * waitingForIncomingMessage2 = exchangeMgr.NewContext(session2.Get().Value(), &delegate);
	NL_TEST_ASSERT(inSuite, waitingForIncomingMessage2 != nullptr);
	sendAndDropMessage(waitingForIncomingMessage2, SendMessageFlags::kExpectResponse);
	NL_TEST_ASSERT(inSuite, rm->TestGetCountRetransTable() == 4);

	auto * waitingForSend1 = exchangeMgr.NewContext(session1.Get().Value(), &delegate);
	NL_TEST_ASSERT(inSuite, waitingForSend1 != nullptr);
	waitingForSend1->WillSendMessage();

	auto * waitingForSend2 = exchangeMgr.NewContext(session2.Get().Value(), &delegate);
	NL_TEST_ASSERT(inSuite, waitingForSend2 != nullptr);
	waitingForSend2->WillSendMessage();

	// Grab handles to our sessions now, before we evict things.
	const auto & sessionHandle1 = session1.Get();
	const auto & sessionHandle2 = session2.Get();

	session1->AsSecureSession()->SetRemoteSessionParameters(ReliableMessageProtocolConfig(
	Test::MessagingContext::kResponsiveIdleRetransTimeout, Test::MessagingContext::kResponsiveActiveRetransTimeout));

	session1Reply->AsSecureSession()->SetRemoteSessionParameters(ReliableMessageProtocolConfig(
	Test::MessagingContext::kResponsiveIdleRetransTimeout, Test::MessagingContext::kResponsiveActiveRetransTimeout));

	NL_TEST_ASSERT(inSuite, session1);
	NL_TEST_ASSERT(inSuite, session2);
	auto * specialExhange = exchangeMgr.NewContext(session1.Get().Value(), &delegate);
	specialExhange->AbortAllOtherCommunicationOnFabric();

	NL_TEST_ASSERT(inSuite, rm->TestGetCountRetransTable() == 0);
	NL_TEST_ASSERT(inSuite, !session1);
	NL_TEST_ASSERT(inSuite, !session2);

	NL_TEST_ASSERT(inSuite, exchangeMgr.NewContext(sessionHandle1.Value(), &delegate) == nullptr);
	NL_TEST_ASSERT(inSuite, exchangeMgr.NewContext(sessionHandle2.Value(), &delegate) == nullptr);

	// Make sure we can't send messages on any of the other exchanges.
	NL_TEST_ASSERT(inSuite, trySendMessage(waitingForSend1, SendMessageFlags::kExpectResponse) != CHIP_NO_ERROR);
	NL_TEST_ASSERT(inSuite, trySendMessage(waitingForSend2, SendMessageFlags::kExpectResponse) != CHIP_NO_ERROR);

	// Make sure we can send a message on the special exchange.
	NL_TEST_ASSERT(inSuite, !delegate.mOnMessageReceivedCalled);
	err = trySendMessage(specialExhange, SendMessageFlags::kNone);
	NL_TEST_ASSERT(inSuite, err == CHIP_NO_ERROR);
	// Should be waiting for an ack now.
	NL_TEST_ASSERT(inSuite, rm->TestGetCountRetransTable() == 1);

	if (dropResponseMessages)
	{
	//
	// This version of the test allows us to validate logic that marks expired sessions as defunct
	// on encountering an MRP failure.
	//
	loopback.mNumMessagesToDrop = Test::LoopbackTransport::kUnlimitedMessageCount;
	loopback.mDroppedMessageCount = 0;

	//
	// We've set the session into responsive mode by altering the MRP intervals, so we should be able to
	// trigger a MRP failure due to timing out waiting for an ACK.
	//
	auto waitTimeout = System::Clock::Milliseconds32(1000);

	#if CHIP_CONFIG_ENABLE_ICD_SERVER == 1
	// If running as an ICD, increase waitTimeout to account for the polling interval
	waitTimeout += ICDConfigurationData::GetInstance().GetSlowPollingInterval();
	#endif

	// Account for the retry delay booster, so that we do not timeout our IO processing before the
	// retransmission failure is triggered.
	waitTimeout += CHIP_CONFIG_RMP_DEFAULT_MAX_RETRANS * CHIP_CONFIG_MRP_RETRY_INTERVAL_SENDER_BOOST;

	ctx.GetIOContext().DriveIOUntil(waitTimeout, [&]() { return false; });
	}
	else
	{
	ctx.DrainAndServiceIO();
	}

	// Should not get an app-level response, since we are not expecting one.
	NL_TEST_ASSERT(inSuite, !delegate.mOnMessageReceivedCalled);

	// We should have gotten our ack.
	NL_TEST_ASSERT(inSuite, rm->TestGetCountRetransTable() == 0);

	waitingForSend1->Close();
	waitingForSend2->Close();

	loopback.mNumMessagesToDrop = 0;
	loopback.mDroppedMessageCount = 0;
	}

	void CheckAbortAllButOneExchange(nlTestSuite * inSuite, void * inContext)
	{
	TestContext & ctx = reinterpret_cast<TestContext >(inContext);
	CommonCheckAbortAllButOneExchange(inSuite, ctx, false);
	}

	void CheckAbortAllButOneExchangeResponseTimeout(nlTestSuite * inSuite, void * inContext)
	{
	TestContext & ctx = reinterpret_cast<TestContext >(inContext);
	CommonCheckAbortAllButOneExchange(inSuite, ctx, true);
	}

	const nlTest sTests[] = {
	NL_TEST_DEF("Test aborting all but one exchange", CheckAbortAllButOneExchange),
	NL_TEST_DEF("Test aborting all but one exchange + response timeout", CheckAbortAllButOneExchangeResponseTimeout),
	NL_TEST_SENTINEL(),
	};

	// clang-format off
	nlTestSuite sSuite = {
	"Test-AbortExchangesForFabric",
	&sTests[0],
	TestContext::nlTestSetUpTestSuite,
	TestContext::nlTestTearDownTestSuite,
	TestContext::nlTestSetUp,
	TestContext::nlTestTearDown,
	};
	// clang-format on

	} // namespace

	/**
	* Main
	*/
	int TestAbortExchangesForFabric()
	{
	return chip::ExecuteTestsWithContext<TestContext>(&sSuite);
	}

	CHIP_REGISTER_TEST_SUITE(TestAbortExchangesForFabric);