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TestWriteInteraction.cpp
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/*
*
* 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.
*/
#include <app-common/zap-generated/cluster-objects.h>
#include <app/InteractionModelEngine.h>
#include <app/reporting/tests/MockReportScheduler.h>
#include <app/tests/AppTestContext.h>
#include <credentials/GroupDataProviderImpl.h>
#include <crypto/DefaultSessionKeystore.h>
#include <lib/core/CHIPCore.h>
#include <lib/core/ErrorStr.h>
#include <lib/core/TLV.h>
#include <lib/core/TLVDebug.h>
#include <lib/core/TLVUtilities.h>
#include <lib/support/TestGroupData.h>
#include <lib/support/TestPersistentStorageDelegate.h>
#include <lib/support/UnitTestContext.h>
#include <lib/support/UnitTestRegistration.h>
#include <messaging/ExchangeContext.h>
#include <messaging/Flags.h>
#include <memory>
#include <nlunit-test.h>
#include <utility>
namespace {
uint8_t attributeDataTLV[CHIP_CONFIG_DEFAULT_UDP_MTU_SIZE];
size_t attributeDataTLVLen = 0;
constexpr chip::DataVersion kRejectedDataVersion = 1;
constexpr chip::DataVersion kAcceptedDataVersion = 5;
constexpr uint16_t kMaxGroupsPerFabric = 5;
constexpr uint16_t kMaxGroupKeysPerFabric = 8;
chip::TestPersistentStorageDelegate gTestStorage;
chip::Crypto::DefaultSessionKeystore gSessionKeystore;
chip::Credentials::GroupDataProviderImpl gGroupsProvider(kMaxGroupsPerFabric, kMaxGroupKeysPerFabric);
class TestContext : public chip::Test::AppContext
{
public:
// Performs setup for each individual test in the test suite
void SetUp() override
{
chip::Test::AppContext::SetUp();
gTestStorage.ClearStorage();
gGroupsProvider.SetStorageDelegate(&gTestStorage);
gGroupsProvider.SetSessionKeystore(&gSessionKeystore);
// TODO: use ASSERT_EQ, once transition to pw_unit_test is complete
VerifyOrDie(gGroupsProvider.Init() == CHIP_NO_ERROR);
chip::Credentials::SetGroupDataProvider(&gGroupsProvider);
uint8_t buf[sizeof(chip::CompressedFabricId)];
chip::MutableByteSpan span(buf);
VerifyOrDie(GetBobFabric()->GetCompressedFabricIdBytes(span) == CHIP_NO_ERROR);
VerifyOrDie(chip::GroupTesting::InitData(&gGroupsProvider, GetBobFabricIndex(), span) == CHIP_NO_ERROR);
}
// Performs teardown for each individual test in the test suite
void TearDown() override
{
chip::Credentials::GroupDataProvider * provider = chip::Credentials::GetGroupDataProvider();
if (provider != nullptr)
provider->Finish();
chip::Test::AppContext::TearDown();
}
};
} // namespace
namespace chip {
namespace app {
class TestWriteInteraction
{
public:
static void TestWriteClient(nlTestSuite * apSuite, void * apContext);
static void TestWriteClientGroup(nlTestSuite * apSuite, void * apContext);
static void TestWriteHandler(nlTestSuite * apSuite, void * apContext);
static void TestWriteRoundtrip(nlTestSuite * apSuite, void * apContext);
static void TestWriteInvalidMessage1(nlTestSuite * apSuite, void * apContext);
static void TestWriteInvalidMessage2(nlTestSuite * apSuite, void * apContext);
static void TestWriteInvalidMessage3(nlTestSuite * apSuite, void * apContext);
static void TestWriteInvalidMessage4(nlTestSuite * apSuite, void * apContext);
static void TestWriteRoundtripWithClusterObjects(nlTestSuite * apSuite, void * apContext);
static void TestWriteRoundtripWithClusterObjectsVersionMatch(nlTestSuite * apSuite, void * apContext);
static void TestWriteRoundtripWithClusterObjectsVersionMismatch(nlTestSuite * apSuite, void * apContext);
#if CONFIG_BUILD_FOR_HOST_UNIT_TEST
static void TestWriteHandlerReceiveInvalidMessage(nlTestSuite * apSuite, void * apContext);
static void TestWriteHandlerInvalidateFabric(nlTestSuite * apSuite, void * apContext);
#endif
private:
static void AddAttributeDataIB(nlTestSuite * apSuite, void * apContext, WriteClient & aWriteClient);
static void AddAttributeStatus(nlTestSuite * apSuite, void * apContext, WriteHandler & aWriteHandler);
static void GenerateWriteRequest(nlTestSuite * apSuite, void * apContext, bool aIsTimedWrite,
System::PacketBufferHandle & aPayload);
static void GenerateWriteResponse(nlTestSuite * apSuite, void * apContext, System::PacketBufferHandle & aPayload);
};
class TestExchangeDelegate : public Messaging::ExchangeDelegate
{
CHIP_ERROR OnMessageReceived(Messaging::ExchangeContext * ec, const PayloadHeader & payloadHeader,
System::PacketBufferHandle && payload) override
{
return CHIP_NO_ERROR;
}
void OnResponseTimeout(Messaging::ExchangeContext * ec) override {}
};
class TestWriteClientCallback : public chip::app::WriteClient::Callback
{
public:
void ResetCounter() { mOnSuccessCalled = mOnErrorCalled = mOnDoneCalled = 0; }
void OnResponse(const WriteClient * apWriteClient, const chip::app::ConcreteDataAttributePath & path, StatusIB status) override
{
mStatus = status;
mOnSuccessCalled++;
}
void OnError(const WriteClient * apWriteClient, CHIP_ERROR chipError) override
{
mOnErrorCalled++;
mLastErrorReason = app::StatusIB(chipError);
mError = chipError;
}
void OnDone(WriteClient * apWriteClient) override { mOnDoneCalled++; }
int mOnSuccessCalled = 0;
int mOnErrorCalled = 0;
int mOnDoneCalled = 0;
StatusIB mStatus;
StatusIB mLastErrorReason;
CHIP_ERROR mError = CHIP_NO_ERROR;
};
void TestWriteInteraction::AddAttributeDataIB(nlTestSuite * apSuite, void * apContext, WriteClient & aWriteClient)
{
CHIP_ERROR err = CHIP_NO_ERROR;
AttributePathParams attributePathParams;
bool attributeValue = true;
attributePathParams.mEndpointId = 2;
attributePathParams.mClusterId = 3;
attributePathParams.mAttributeId = 4;
err = aWriteClient.EncodeAttribute(attributePathParams, attributeValue);
NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
}
void TestWriteInteraction::AddAttributeStatus(nlTestSuite * apSuite, void * apContext, WriteHandler & aWriteHandler)
{
CHIP_ERROR err = CHIP_NO_ERROR;
ConcreteAttributePath attributePath(2, 3, 4);
err = aWriteHandler.AddStatus(attributePath, Protocols::InteractionModel::Status::Success);
NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
}
void TestWriteInteraction::GenerateWriteRequest(nlTestSuite * apSuite, void * apContext, bool aIsTimedWrite,
System::PacketBufferHandle & aPayload)
{
CHIP_ERROR err = CHIP_NO_ERROR;
System::PacketBufferTLVWriter writer;
writer.Init(std::move(aPayload));
WriteRequestMessage::Builder writeRequestBuilder;
err = writeRequestBuilder.Init(&writer);
NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
writeRequestBuilder.TimedRequest(aIsTimedWrite);
NL_TEST_ASSERT(apSuite, writeRequestBuilder.GetError() == CHIP_NO_ERROR);
AttributeDataIBs::Builder & attributeDataIBsBuilder = writeRequestBuilder.CreateWriteRequests();
NL_TEST_ASSERT(apSuite, writeRequestBuilder.GetError() == CHIP_NO_ERROR);
AttributeDataIB::Builder & attributeDataIBBuilder = attributeDataIBsBuilder.CreateAttributeDataIBBuilder();
NL_TEST_ASSERT(apSuite, attributeDataIBsBuilder.GetError() == CHIP_NO_ERROR);
attributeDataIBBuilder.DataVersion(0);
NL_TEST_ASSERT(apSuite, attributeDataIBBuilder.GetError() == CHIP_NO_ERROR);
AttributePathIB::Builder & attributePathBuilder = attributeDataIBBuilder.CreatePath();
NL_TEST_ASSERT(apSuite, attributePathBuilder.GetError() == CHIP_NO_ERROR);
err = attributePathBuilder.Node(1)
.Endpoint(2)
.Cluster(3)
.Attribute(4)
.ListIndex(DataModel::Nullable<ListIndex>())
.EndOfAttributePathIB();
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(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);
attributeDataIBsBuilder.EndOfAttributeDataIBs();
NL_TEST_ASSERT(apSuite, attributeDataIBsBuilder.GetError() == CHIP_NO_ERROR);
writeRequestBuilder.EndOfWriteRequestMessage();
NL_TEST_ASSERT(apSuite, writeRequestBuilder.GetError() == CHIP_NO_ERROR);
err = writer.Finalize(&aPayload);
NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
}
void TestWriteInteraction::GenerateWriteResponse(nlTestSuite * apSuite, void * apContext, System::PacketBufferHandle & aPayload)
{
CHIP_ERROR err = CHIP_NO_ERROR;
System::PacketBufferTLVWriter writer;
writer.Init(std::move(aPayload));
WriteResponseMessage::Builder writeResponseBuilder;
err = writeResponseBuilder.Init(&writer);
NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
AttributeStatusIBs::Builder & attributeStatusesBuilder = writeResponseBuilder.CreateWriteResponses();
NL_TEST_ASSERT(apSuite, attributeStatusesBuilder.GetError() == CHIP_NO_ERROR);
AttributeStatusIB::Builder & attributeStatusIBBuilder = attributeStatusesBuilder.CreateAttributeStatus();
NL_TEST_ASSERT(apSuite, attributeStatusIBBuilder.GetError() == CHIP_NO_ERROR);
AttributePathIB::Builder & attributePathBuilder = attributeStatusIBBuilder.CreatePath();
NL_TEST_ASSERT(apSuite, attributePathBuilder.GetError() == CHIP_NO_ERROR);
err = attributePathBuilder.Node(1)
.Endpoint(2)
.Cluster(3)
.Attribute(4)
.ListIndex(DataModel::Nullable<ListIndex>())
.EndOfAttributePathIB();
NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
StatusIB::Builder & statusIBBuilder = attributeStatusIBBuilder.CreateErrorStatus();
StatusIB statusIB;
statusIB.mStatus = chip::Protocols::InteractionModel::Status::InvalidSubscription;
NL_TEST_ASSERT(apSuite, statusIBBuilder.GetError() == CHIP_NO_ERROR);
statusIBBuilder.EncodeStatusIB(statusIB);
err = statusIBBuilder.GetError();
NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
attributeStatusIBBuilder.EndOfAttributeStatusIB();
NL_TEST_ASSERT(apSuite, attributeStatusIBBuilder.GetError() == CHIP_NO_ERROR);
attributeStatusesBuilder.EndOfAttributeStatuses();
NL_TEST_ASSERT(apSuite, attributeStatusesBuilder.GetError() == CHIP_NO_ERROR);
writeResponseBuilder.EndOfWriteResponseMessage();
NL_TEST_ASSERT(apSuite, writeResponseBuilder.GetError() == CHIP_NO_ERROR);
err = writer.Finalize(&aPayload);
NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
}
void TestWriteInteraction::TestWriteClient(nlTestSuite * apSuite, void * apContext)
{
TestContext & ctx = *static_cast<TestContext *>(apContext);
CHIP_ERROR err = CHIP_NO_ERROR;
TestWriteClientCallback callback;
app::WriteClient writeClient(&ctx.GetExchangeManager(), &callback, /* aTimedWriteTimeoutMs = */ NullOptional);
System::PacketBufferHandle buf = System::PacketBufferHandle::New(System::PacketBuffer::kMaxSize);
AddAttributeDataIB(apSuite, apContext, writeClient);
err = writeClient.SendWriteRequest(ctx.GetSessionBobToAlice());
NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
ctx.DrainAndServiceIO();
GenerateWriteResponse(apSuite, apContext, buf);
err = writeClient.ProcessWriteResponseMessage(std::move(buf));
NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
writeClient.Close();
Messaging::ReliableMessageMgr * rm = ctx.GetExchangeManager().GetReliableMessageMgr();
NL_TEST_ASSERT(apSuite, rm->TestGetCountRetransTable() == 0);
}
void TestWriteInteraction::TestWriteClientGroup(nlTestSuite * apSuite, void * apContext)
{
TestContext & ctx = *static_cast<TestContext *>(apContext);
CHIP_ERROR err = CHIP_NO_ERROR;
TestWriteClientCallback callback;
app::WriteClient writeClient(&ctx.GetExchangeManager(), &callback, /* aTimedWriteTimeoutMs = */ NullOptional);
System::PacketBufferHandle buf = System::PacketBufferHandle::New(System::PacketBuffer::kMaxSize);
AddAttributeDataIB(apSuite, apContext, writeClient);
SessionHandle groupSession = ctx.GetSessionBobToFriends();
NL_TEST_ASSERT(apSuite, groupSession->IsGroupSession());
err = writeClient.SendWriteRequest(groupSession);
NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
ctx.DrainAndServiceIO();
// The WriteClient should be shutdown once we SendWriteRequest for group.
NL_TEST_ASSERT(apSuite, writeClient.mState == WriteClient::State::AwaitingDestruction);
}
void TestWriteInteraction::TestWriteHandler(nlTestSuite * apSuite, void * apContext)
{
using namespace Protocols::InteractionModel;
TestContext & ctx = *static_cast<TestContext *>(apContext);
constexpr bool allBooleans[] = { true, false };
for (auto messageIsTimed : allBooleans)
{
for (auto transactionIsTimed : allBooleans)
{
CHIP_ERROR err = CHIP_NO_ERROR;
app::WriteHandler writeHandler;
System::PacketBufferHandle buf = System::PacketBufferHandle::New(System::PacketBuffer::kMaxSize);
err = writeHandler.Init();
GenerateWriteRequest(apSuite, apContext, messageIsTimed, buf);
TestExchangeDelegate delegate;
Messaging::ExchangeContext * exchange = ctx.NewExchangeToBob(&delegate);
Status status = writeHandler.OnWriteRequest(exchange, std::move(buf), transactionIsTimed);
if (messageIsTimed == transactionIsTimed)
{
NL_TEST_ASSERT(apSuite, status == Status::Success);
}
else
{
NL_TEST_ASSERT(apSuite, status == Status::UnsupportedAccess);
}
ctx.DrainAndServiceIO();
Messaging::ReliableMessageMgr * rm = ctx.GetExchangeManager().GetReliableMessageMgr();
NL_TEST_ASSERT(apSuite, rm->TestGetCountRetransTable() == 0);
}
}
}
const EmberAfAttributeMetadata * GetAttributeMetadata(const ConcreteAttributePath & aConcreteClusterPath)
{
// Note: This test does not make use of the real attribute metadata.
static EmberAfAttributeMetadata stub = { .defaultValue = EmberAfDefaultOrMinMaxAttributeValue(uint32_t(0)) };
return &stub;
}
CHIP_ERROR WriteSingleClusterData(const Access::SubjectDescriptor & aSubjectDescriptor, const ConcreteDataAttributePath & aPath,
TLV::TLVReader & aReader, WriteHandler * aWriteHandler)
{
if (aPath.mDataVersion.HasValue() && aPath.mDataVersion.Value() == kRejectedDataVersion)
{
return aWriteHandler->AddStatus(aPath, Protocols::InteractionModel::Status::DataVersionMismatch);
}
TLV::TLVWriter writer;
writer.Init(attributeDataTLV);
writer.CopyElement(TLV::AnonymousTag(), aReader);
attributeDataTLVLen = writer.GetLengthWritten();
return aWriteHandler->AddStatus(aPath, Protocols::InteractionModel::Status::Success);
}
void TestWriteInteraction::TestWriteRoundtripWithClusterObjects(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);
TestWriteClientCallback callback;
auto * engine = chip::app::InteractionModelEngine::GetInstance();
err = engine->Init(&ctx.GetExchangeManager(), &ctx.GetFabricTable(), app::reporting::GetDefaultReportScheduler());
NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
app::WriteClient writeClient(engine->GetExchangeManager(), &callback, Optional<uint16_t>::Missing());
System::PacketBufferHandle buf = System::PacketBufferHandle::New(System::PacketBuffer::kMaxSize);
AttributePathParams attributePathParams;
attributePathParams.mEndpointId = 2;
attributePathParams.mClusterId = 3;
attributePathParams.mAttributeId = 4;
const uint8_t byteSpanData[] = { 0xde, 0xad, 0xbe, 0xef };
static const char charSpanData[] = "a simple test string";
app::Clusters::UnitTesting::Structs::SimpleStruct::Type dataTx;
dataTx.a = 12;
dataTx.b = true;
dataTx.d = chip::ByteSpan(byteSpanData);
// Spec A.11.2 strings SHALL NOT include a terminating null character to mark the end of a string.
dataTx.e = chip::Span<const char>(charSpanData, strlen(charSpanData));
writeClient.EncodeAttribute(attributePathParams, dataTx);
NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
NL_TEST_ASSERT(apSuite, callback.mOnSuccessCalled == 0);
err = writeClient.SendWriteRequest(ctx.GetSessionBobToAlice());
NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
ctx.DrainAndServiceIO();
NL_TEST_ASSERT(apSuite, callback.mOnSuccessCalled == 1);
{
app::Clusters::UnitTesting::Structs::SimpleStruct::Type dataRx;
TLV::TLVReader reader;
reader.Init(attributeDataTLV, attributeDataTLVLen);
reader.Next();
NL_TEST_ASSERT(apSuite, CHIP_NO_ERROR == DataModel::Decode(reader, dataRx));
NL_TEST_ASSERT(apSuite, dataRx.a == dataTx.a);
NL_TEST_ASSERT(apSuite, dataRx.b == dataTx.b);
NL_TEST_ASSERT(apSuite, dataRx.d.data_equal(dataTx.d));
// Equals to dataRx.e.size() == dataTx.e.size() && memncmp(dataRx.e.data(), dataTx.e.data(), dataTx.e.size()) == 0
NL_TEST_ASSERT(apSuite, dataRx.e.data_equal(dataTx.e));
}
NL_TEST_ASSERT(apSuite, callback.mOnSuccessCalled == 1 && callback.mOnErrorCalled == 0 && callback.mOnDoneCalled == 1);
// 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();
}
void TestWriteInteraction::TestWriteRoundtripWithClusterObjectsVersionMatch(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);
TestWriteClientCallback callback;
auto * engine = chip::app::InteractionModelEngine::GetInstance();
err = engine->Init(&ctx.GetExchangeManager(), &ctx.GetFabricTable(), app::reporting::GetDefaultReportScheduler());
NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
app::WriteClient writeClient(engine->GetExchangeManager(), &callback, Optional<uint16_t>::Missing());
System::PacketBufferHandle buf = System::PacketBufferHandle::New(System::PacketBuffer::kMaxSize);
AttributePathParams attributePathParams;
attributePathParams.mEndpointId = 2;
attributePathParams.mClusterId = 3;
attributePathParams.mAttributeId = 4;
DataModel::Nullable<app::Clusters::UnitTesting::Structs::SimpleStruct::Type> dataTx;
Optional<DataVersion> version(kAcceptedDataVersion);
writeClient.EncodeAttribute(attributePathParams, dataTx, version);
NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
NL_TEST_ASSERT(apSuite, callback.mOnSuccessCalled == 0);
err = writeClient.SendWriteRequest(ctx.GetSessionBobToAlice());
NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
ctx.DrainAndServiceIO();
NL_TEST_ASSERT(apSuite,
callback.mOnSuccessCalled == 1 && callback.mOnErrorCalled == 0 && callback.mOnDoneCalled == 1 &&
callback.mStatus.mStatus == Protocols::InteractionModel::Status::Success);
// 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();
}
void TestWriteInteraction::TestWriteRoundtripWithClusterObjectsVersionMismatch(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);
TestWriteClientCallback callback;
auto * engine = chip::app::InteractionModelEngine::GetInstance();
err = engine->Init(&ctx.GetExchangeManager(), &ctx.GetFabricTable(), app::reporting::GetDefaultReportScheduler());
NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
app::WriteClient writeClient(engine->GetExchangeManager(), &callback, Optional<uint16_t>::Missing());
System::PacketBufferHandle buf = System::PacketBufferHandle::New(System::PacketBuffer::kMaxSize);
AttributePathParams attributePathParams;
attributePathParams.mEndpointId = 2;
attributePathParams.mClusterId = 3;
attributePathParams.mAttributeId = 4;
app::Clusters::UnitTesting::Structs::SimpleStruct::Type dataTxValue;
dataTxValue.a = 12;
dataTxValue.b = true;
DataModel::Nullable<app::Clusters::UnitTesting::Structs::SimpleStruct::Type> dataTx;
dataTx.SetNonNull(dataTxValue);
Optional<DataVersion> version(kRejectedDataVersion);
writeClient.EncodeAttribute(attributePathParams, dataTx, version);
NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
NL_TEST_ASSERT(apSuite, callback.mOnSuccessCalled == 0);
err = writeClient.SendWriteRequest(ctx.GetSessionBobToAlice());
NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
ctx.DrainAndServiceIO();
NL_TEST_ASSERT(apSuite,
callback.mOnSuccessCalled == 1 && callback.mOnErrorCalled == 0 && callback.mOnDoneCalled == 1 &&
callback.mStatus.mStatus == Protocols::InteractionModel::Status::DataVersionMismatch);
// 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();
}
void TestWriteInteraction::TestWriteRoundtrip(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);
TestWriteClientCallback callback;
auto * engine = chip::app::InteractionModelEngine::GetInstance();
err = engine->Init(&ctx.GetExchangeManager(), &ctx.GetFabricTable(), app::reporting::GetDefaultReportScheduler());
NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
app::WriteClient writeClient(engine->GetExchangeManager(), &callback, Optional<uint16_t>::Missing());
System::PacketBufferHandle buf = System::PacketBufferHandle::New(System::PacketBuffer::kMaxSize);
AddAttributeDataIB(apSuite, apContext, writeClient);
NL_TEST_ASSERT(apSuite, callback.mOnSuccessCalled == 0 && callback.mOnErrorCalled == 0 && callback.mOnDoneCalled == 0);
err = writeClient.SendWriteRequest(ctx.GetSessionBobToAlice());
NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
ctx.DrainAndServiceIO();
NL_TEST_ASSERT(apSuite, callback.mOnSuccessCalled == 1 && callback.mOnErrorCalled == 0 && callback.mOnDoneCalled == 1);
// 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();
}
// This test creates a chunked write request, we drop the second write chunk message, then write handler receives unknown
// report message and sends out a status report with invalid action.
#if CONFIG_BUILD_FOR_HOST_UNIT_TEST
void TestWriteInteraction::TestWriteHandlerReceiveInvalidMessage(nlTestSuite * apSuite, void * apContext)
{
TestContext & ctx = *static_cast<TestContext *>(apContext);
auto sessionHandle = ctx.GetSessionBobToAlice();
app::AttributePathParams attributePath(2, 3, 4);
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);
TestWriteClientCallback writeCallback;
auto * engine = chip::app::InteractionModelEngine::GetInstance();
err = engine->Init(&ctx.GetExchangeManager(), &ctx.GetFabricTable(), app::reporting::GetDefaultReportScheduler());
NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
// Reserve all except the last 128 bytes, so that we make sure to chunk.
app::WriteClient writeClient(&ctx.GetExchangeManager(), &writeCallback, Optional<uint16_t>::Missing(),
static_cast<uint16_t>(kMaxSecureSduLengthBytes - 128) /* reserved buffer size */);
ByteSpan list[5];
err = writeClient.EncodeAttribute(attributePath, app::DataModel::List<ByteSpan>(list, 5));
NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
ctx.GetLoopback().mSentMessageCount = 0;
ctx.GetLoopback().mNumMessagesToDrop = 1;
ctx.GetLoopback().mNumMessagesToAllowBeforeDropping = 2;
err = writeClient.SendWriteRequest(sessionHandle);
NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
ctx.DrainAndServiceIO();
NL_TEST_ASSERT(apSuite, InteractionModelEngine::GetInstance()->GetNumActiveWriteHandlers() == 1);
NL_TEST_ASSERT(apSuite, ctx.GetLoopback().mSentMessageCount == 3);
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));
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);
auto * writeHandler = InteractionModelEngine::GetInstance()->ActiveWriteHandlerAt(0);
rm->ClearRetransTable(writeClient.mExchangeCtx.Get());
rm->ClearRetransTable(writeHandler->mExchangeCtx.Get());
ctx.GetLoopback().mSentMessageCount = 0;
ctx.GetLoopback().mNumMessagesToDrop = 0;
writeHandler->OnMessageReceived(writeHandler->mExchangeCtx.Get(), payloadHeader, std::move(msgBuf));
ctx.DrainAndServiceIO();
NL_TEST_ASSERT(apSuite, writeCallback.mLastErrorReason.mStatus == Protocols::InteractionModel::Status::InvalidAction);
NL_TEST_ASSERT(apSuite, InteractionModelEngine::GetInstance()->GetNumActiveWriteHandlers() == 0);
engine->Shutdown();
ctx.ExpireSessionAliceToBob();
ctx.ExpireSessionBobToAlice();
ctx.CreateSessionAliceToBob();
ctx.CreateSessionBobToAlice();
}
// This test is to create Chunked write requests, we drop the message since the 3rd message, then remove fabrics for client and
// handler, the corresponding client and handler would be released as well.
void TestWriteInteraction::TestWriteHandlerInvalidateFabric(nlTestSuite * apSuite, void * apContext)
{
TestContext & ctx = *static_cast<TestContext *>(apContext);
auto sessionHandle = ctx.GetSessionBobToAlice();
app::AttributePathParams attributePath(2, 3, 4);
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);
TestWriteClientCallback writeCallback;
auto * engine = chip::app::InteractionModelEngine::GetInstance();
err = engine->Init(&ctx.GetExchangeManager(), &ctx.GetFabricTable(), app::reporting::GetDefaultReportScheduler());
NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
// Reserve all except the last 128 bytes, so that we make sure to chunk.
app::WriteClient writeClient(&ctx.GetExchangeManager(), &writeCallback, Optional<uint16_t>::Missing(),
static_cast<uint16_t>(kMaxSecureSduLengthBytes - 128) /* reserved buffer size */);
ByteSpan list[5];
err = writeClient.EncodeAttribute(attributePath, app::DataModel::List<ByteSpan>(list, 5));
NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
ctx.GetLoopback().mDroppedMessageCount = 0;
ctx.GetLoopback().mSentMessageCount = 0;
ctx.GetLoopback().mNumMessagesToDrop = 1;
ctx.GetLoopback().mNumMessagesToAllowBeforeDropping = 2;
err = writeClient.SendWriteRequest(sessionHandle);
NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
ctx.DrainAndServiceIO();
NL_TEST_ASSERT(apSuite, InteractionModelEngine::GetInstance()->GetNumActiveWriteHandlers() == 1);
NL_TEST_ASSERT(apSuite, ctx.GetLoopback().mSentMessageCount == 3);
NL_TEST_ASSERT(apSuite, ctx.GetLoopback().mDroppedMessageCount == 1);
ctx.GetFabricTable().Delete(ctx.GetAliceFabricIndex());
NL_TEST_ASSERT(apSuite, InteractionModelEngine::GetInstance()->GetNumActiveWriteHandlers() == 0);
engine->Shutdown();
ctx.ExpireSessionAliceToBob();
ctx.ExpireSessionBobToAlice();
ctx.CreateAliceFabric();
ctx.CreateSessionAliceToBob();
ctx.CreateSessionBobToAlice();
}
#endif
/**
* 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; \
}); \
}
// Write Client sends a write request, receives an unexpected message type, sends a status response to that.
void TestWriteInteraction::TestWriteInvalidMessage1(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);
TestWriteClientCallback callback;
auto * engine = chip::app::InteractionModelEngine::GetInstance();
err = engine->Init(&ctx.GetExchangeManager(), &ctx.GetFabricTable(), app::reporting::GetDefaultReportScheduler());
NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
app::WriteClient writeClient(engine->GetExchangeManager(), &callback, Optional<uint16_t>::Missing());
System::PacketBufferHandle buf = System::PacketBufferHandle::New(System::PacketBuffer::kMaxSize);
AddAttributeDataIB(apSuite, apContext, writeClient);
NL_TEST_ASSERT(apSuite, callback.mOnSuccessCalled == 0 && callback.mOnErrorCalled == 0 && callback.mOnDoneCalled == 0);
ctx.GetLoopback().mSentMessageCount = 0;
ctx.GetLoopback().mNumMessagesToDrop = 1;
ctx.GetLoopback().mNumMessagesToAllowBeforeDropping = 1;
ctx.GetLoopback().mDroppedMessageCount = 0;
err = writeClient.SendWriteRequest(ctx.GetSessionBobToAlice());
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));
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, writeClient.mExchangeCtx.Get());
ctx.GetLoopback().mSentMessageCount = 0;
ctx.GetLoopback().mNumMessagesToDrop = 0;
ctx.GetLoopback().mNumMessagesToAllowBeforeDropping = 0;
ctx.GetLoopback().mDroppedMessageCount = 0;
err = writeClient.OnMessageReceived(writeClient.mExchangeCtx.Get(), payloadHeader, std::move(msgBuf));
NL_TEST_ASSERT(apSuite, err == CHIP_ERROR_INVALID_MESSAGE_TYPE);
ctx.DrainAndServiceIO();
NL_TEST_ASSERT(apSuite, callback.mError == CHIP_ERROR_INVALID_MESSAGE_TYPE);
NL_TEST_ASSERT(apSuite, callback.mOnSuccessCalled == 0 && callback.mOnErrorCalled == 1 && callback.mOnDoneCalled == 1);
// TODO: Check that the server gets the right status.
// Client sents status report with invalid action, server's exchange has been closed, so all it sends is an MRP Ack
NL_TEST_ASSERT(apSuite, ctx.GetLoopback().mSentMessageCount == 2);
engine->Shutdown();
ctx.ExpireSessionAliceToBob();
ctx.ExpireSessionBobToAlice();
ctx.CreateSessionAliceToBob();
ctx.CreateSessionBobToAlice();
}
// Write Client sends a write request, receives a malformed write response message, sends a Status Report.
void TestWriteInteraction::TestWriteInvalidMessage2(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);
TestWriteClientCallback callback;
auto * engine = chip::app::InteractionModelEngine::GetInstance();
err = engine->Init(&ctx.GetExchangeManager(), &ctx.GetFabricTable(), app::reporting::GetDefaultReportScheduler());
NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
app::WriteClient writeClient(engine->GetExchangeManager(), &callback, Optional<uint16_t>::Missing());
System::PacketBufferHandle buf = System::PacketBufferHandle::New(System::PacketBuffer::kMaxSize);
AddAttributeDataIB(apSuite, apContext, writeClient);
NL_TEST_ASSERT(apSuite, callback.mOnSuccessCalled == 0 && callback.mOnErrorCalled == 0 && callback.mOnDoneCalled == 0);
ctx.GetLoopback().mSentMessageCount = 0;
ctx.GetLoopback().mNumMessagesToDrop = 1;
ctx.GetLoopback().mNumMessagesToAllowBeforeDropping = 1;
ctx.GetLoopback().mDroppedMessageCount = 0;
err = writeClient.SendWriteRequest(ctx.GetSessionBobToAlice());
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));
WriteResponseMessage::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::WriteResponse);
// 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, writeClient.mExchangeCtx.Get());
ctx.GetLoopback().mSentMessageCount = 0;
ctx.GetLoopback().mNumMessagesToDrop = 0;
ctx.GetLoopback().mNumMessagesToAllowBeforeDropping = 0;
ctx.GetLoopback().mDroppedMessageCount = 0;
err = writeClient.OnMessageReceived(writeClient.mExchangeCtx.Get(), payloadHeader, std::move(msgBuf));
NL_TEST_ASSERT(apSuite, err == CHIP_ERROR_END_OF_TLV);
ctx.DrainAndServiceIO();
NL_TEST_ASSERT(apSuite, callback.mError == CHIP_ERROR_END_OF_TLV);
NL_TEST_ASSERT(apSuite, callback.mOnSuccessCalled == 0 && callback.mOnErrorCalled == 1 && callback.mOnDoneCalled == 1);
// Client sents status report with invalid action, server's exchange has been closed, so all it sends is an MRP Ack
NL_TEST_ASSERT(apSuite, ctx.GetLoopback().mSentMessageCount == 2);
engine->Shutdown();
ctx.ExpireSessionAliceToBob();
ctx.ExpireSessionBobToAlice();
ctx.CreateSessionAliceToBob();
ctx.CreateSessionBobToAlice();
}
// Write Client sends a write request, receives a malformed status response message.
void TestWriteInteraction::TestWriteInvalidMessage3(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);
TestWriteClientCallback callback;
auto * engine = chip::app::InteractionModelEngine::GetInstance();
err = engine->Init(&ctx.GetExchangeManager(), &ctx.GetFabricTable(), app::reporting::GetDefaultReportScheduler());
NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
app::WriteClient writeClient(engine->GetExchangeManager(), &callback, Optional<uint16_t>::Missing());
System::PacketBufferHandle buf = System::PacketBufferHandle::New(System::PacketBuffer::kMaxSize);
AddAttributeDataIB(apSuite, apContext, writeClient);
NL_TEST_ASSERT(apSuite, callback.mOnSuccessCalled == 0 && callback.mOnErrorCalled == 0 && callback.mOnDoneCalled == 0);
ctx.GetLoopback().mSentMessageCount = 0;
ctx.GetLoopback().mNumMessagesToDrop = 1;
ctx.GetLoopback().mNumMessagesToAllowBeforeDropping = 1;
ctx.GetLoopback().mDroppedMessageCount = 0;
err = writeClient.SendWriteRequest(ctx.GetSessionBobToAlice());
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);
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, writeClient.mExchangeCtx.Get());
ctx.GetLoopback().mSentMessageCount = 0;
ctx.GetLoopback().mNumMessagesToDrop = 0;
ctx.GetLoopback().mNumMessagesToAllowBeforeDropping = 0;
ctx.GetLoopback().mDroppedMessageCount = 0;
err = writeClient.OnMessageReceived(writeClient.mExchangeCtx.Get(), payloadHeader, std::move(msgBuf));
NL_TEST_ASSERT(apSuite, err == CHIP_ERROR_END_OF_TLV);
ctx.DrainAndServiceIO();
NL_TEST_ASSERT(apSuite, callback.mError == CHIP_ERROR_END_OF_TLV);
NL_TEST_ASSERT(apSuite, callback.mOnSuccessCalled == 0 && callback.mOnErrorCalled == 1 && callback.mOnDoneCalled == 1);
// TODO: Check that the server gets the right status
// Client sents status report with invalid action, server's exchange has been closed, so all it sends is an MRP ack.
NL_TEST_ASSERT(apSuite, ctx.GetLoopback().mSentMessageCount == 2);
engine->Shutdown();
ctx.ExpireSessionAliceToBob();
ctx.ExpireSessionBobToAlice();
ctx.CreateSessionAliceToBob();
ctx.CreateSessionBobToAlice();
}
// Write Client sends a write request, receives a busy status response message.
void TestWriteInteraction::TestWriteInvalidMessage4(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);
TestWriteClientCallback callback;
auto * engine = chip::app::InteractionModelEngine::GetInstance();
err = engine->Init(&ctx.GetExchangeManager(), &ctx.GetFabricTable(), app::reporting::GetDefaultReportScheduler());
NL_TEST_ASSERT(apSuite, err == CHIP_NO_ERROR);
app::WriteClient writeClient(engine->GetExchangeManager(), &callback, Optional<uint16_t>::Missing());
System::PacketBufferHandle buf = System::PacketBufferHandle::New(System::PacketBuffer::kMaxSize);
AddAttributeDataIB(apSuite, apContext, writeClient);
NL_TEST_ASSERT(apSuite, callback.mOnSuccessCalled == 0 && callback.mOnErrorCalled == 0 && callback.mOnDoneCalled == 0);
ctx.GetLoopback().mSentMessageCount = 0;
ctx.GetLoopback().mNumMessagesToDrop = 1;
ctx.GetLoopback().mNumMessagesToAllowBeforeDropping = 1;
ctx.GetLoopback().mDroppedMessageCount = 0;
err = writeClient.SendWriteRequest(ctx.GetSessionBobToAlice());
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);