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/*
* Copyright 2024 The Android Open Source Project
*
* 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 "../dispatcher/trace/InputTracingBackendInterface.h"
#include <android-base/result.h>
#include <android-base/thread_annotations.h>
#include <gtest/gtest.h>
#include <input/Input.h>
#include <condition_variable>
#include <memory>
#include <mutex>
#include <unordered_map>
#include <vector>
namespace android::inputdispatcher {
/**
* A class representing an input trace, used to make assertions on what was traced by
* InputDispatcher in tests. This class is thread-safe.
*/
class VerifyingTrace {
public:
VerifyingTrace() = default;
/** Add an expectation for a key event to be traced. */
void expectKeyDispatchTraced(const KeyEvent& event, int32_t windowId);
/** Add an expectation for a motion event to be traced. */
void expectMotionDispatchTraced(const MotionEvent& event, int32_t windowId);
/**
* Wait and verify that all expected events are traced.
* This is a lenient verifier that does not expect the events to be traced in the order
* that the events were expected, and does not fail if there are events that are traced that
* were not expected. Verifying does not clear the expectations.
*/
void verifyExpectedEventsTraced();
/** Reset the trace and clear all expectations. */
void reset();
private:
std::mutex mLock;
std::condition_variable mEventTracedCondition;
std::unordered_map<uint32_t /*eventId*/, trace::TracedEvent> mTracedEvents GUARDED_BY(mLock);
using WindowDispatchArgs = trace::InputTracingBackendInterface::WindowDispatchArgs;
std::vector<WindowDispatchArgs> mTracedWindowDispatches GUARDED_BY(mLock);
std::vector<std::pair<std::variant<KeyEvent, MotionEvent>, int32_t /*windowId*/>>
mExpectedEvents GUARDED_BY(mLock);
friend class FakeInputTracingBackend;
// Helper to verify that the given event appears as expected in the trace. If the verification
// fails, the error message describes why.
template <typename Event>
base::Result<void> verifyEventTraced(const Event&, int32_t windowId) const REQUIRES(mLock);
};
/**
* A backend implementation for input tracing that records events to the provided
* VerifyingTrace used for testing.
*/
class FakeInputTracingBackend : public trace::InputTracingBackendInterface {
public:
FakeInputTracingBackend(std::shared_ptr<VerifyingTrace> trace) : mTrace(trace) {}
private:
std::shared_ptr<VerifyingTrace> mTrace;
void traceKeyEvent(const trace::TracedKeyEvent& entry) override;
void traceMotionEvent(const trace::TracedMotionEvent& entry) override;
void traceWindowDispatch(const WindowDispatchArgs& entry) override;
};
} // namespace android::inputdispatcher
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