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/*
* Copyright (C) 2020 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.
*/
#include <gmock/gmock.h>
#include <gtest/gtest.h>
#include <vibratorservice/VibratorCallbackScheduler.h>
#include "test_utils.h"
using std::chrono::milliseconds;
using std::chrono::steady_clock;
using std::chrono::time_point;
using namespace android;
using namespace std::chrono_literals;
using namespace testing;
// -------------------------------------------------------------------------------------------------
// Delay allowed for the scheduler to process callbacks during this test.
static const auto TEST_TIMEOUT = 100ms;
class VibratorCallbackSchedulerTest : public Test {
public:
void SetUp() override { mScheduler = std::make_unique<vibrator::CallbackScheduler>(); }
protected:
std::mutex mMutex;
std::unique_ptr<vibrator::CallbackScheduler> mScheduler = nullptr;
vibrator::TestCounter mCallbackCounter;
std::vector<int32_t> mExpiredCallbacks GUARDED_BY(mMutex);
std::function<void()> createCallback(int32_t id) {
return [this, id]() {
{
std::lock_guard<std::mutex> lock(mMutex);
mExpiredCallbacks.push_back(id);
}
mCallbackCounter.increment();
};
}
std::vector<int32_t> getExpiredCallbacks() {
std::lock_guard<std::mutex> lock(mMutex);
return std::vector<int32_t>(mExpiredCallbacks);
}
int32_t waitForCallbacks(int32_t callbackCount, milliseconds timeout) {
mCallbackCounter.tryWaitUntilCountIsAtLeast(callbackCount, timeout);
return mCallbackCounter.get();
}
};
// -------------------------------------------------------------------------------------------------
TEST_F(VibratorCallbackSchedulerTest, TestScheduleRunsOnlyAfterDelay) {
auto callbackDuration = 50ms;
time_point<steady_clock> startTime = steady_clock::now();
mScheduler->schedule(createCallback(1), callbackDuration);
ASSERT_THAT(waitForCallbacks(1, callbackDuration + TEST_TIMEOUT), Eq(1));
time_point<steady_clock> callbackTime = steady_clock::now();
// Callback took at least the required duration to trigger.
ASSERT_THAT(callbackTime, Ge(startTime + callbackDuration));
}
TEST_F(VibratorCallbackSchedulerTest, TestScheduleMultipleCallbacksRunsInDelayOrder) {
// Schedule first callbacks long enough that all 3 will be scheduled together and run in order.
mScheduler->schedule(createCallback(1), 50ms + 2 * TEST_TIMEOUT);
mScheduler->schedule(createCallback(2), 50ms + TEST_TIMEOUT);
mScheduler->schedule(createCallback(3), 50ms);
// Callbacks triggered in the expected order based on the requested durations.
ASSERT_THAT(waitForCallbacks(3, 50ms + 3 * TEST_TIMEOUT), Eq(3));
ASSERT_THAT(getExpiredCallbacks(), ElementsAre(3, 2, 1));
}
TEST_F(VibratorCallbackSchedulerTest, TestDestructorDropsPendingCallbacksAndKillsThread) {
// Schedule callback long enough that scheduler will be destroyed while it's still scheduled.
mScheduler->schedule(createCallback(1), 100ms);
mScheduler.reset(nullptr);
// Should timeout waiting for callback to run.
ASSERT_THAT(waitForCallbacks(1, 100ms + TEST_TIMEOUT), Eq(0));
ASSERT_THAT(getExpiredCallbacks(), IsEmpty());
}
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