src/data-model-providers/codegen/tests/EmberReadWriteOverride.h

/*
 *    Copyright (c) 2024 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.
 */
#pragma once

#include <app/data-model-provider/Provider.h>
#include <lib/support/Span.h>
#include <protocols/interaction_model/StatusCode.h>

#include <variant>

namespace chip {
namespace Testing {

/// specify what the next `emAfReadOrWriteAttribute` will contain
///
/// It may return a value with success or some error. The byte span WILL BE COPIED.
void SetEmberReadOutput(std::variant<chip::ByteSpan, chip::Protocols::InteractionModel::Status> what);

/// Grab the data currently in the buffer
chip::ByteSpan GetEmberBuffer();

/// Defines the provider used to notify of attribute writes.
///
/// Ember has NotifyAttributeChange logic in emberAfWriteAttribute. Since
/// these classes override the write logic, we make change notifications be
/// reported to this given provider.
class TestNotifiedProvider
{
public:
    TestNotifiedProvider(app::DataModel::Provider * provider)
    {
        mOldProvider = gProvider;
        gProvider    = provider;
    }
    ~TestNotifiedProvider() { gProvider = mOldProvider; }

    static app::DataModel::Provider * Provider() { return gProvider; }

private:
    app::DataModel::Provider * mOldProvider; // RAII override
    static app::DataModel::Provider * gProvider;
};

} // namespace Testing
} // namespace chip