blob: be640dd44e15b40da58e9f4a603c5f49537385d0 [file] [log] [blame]
/*
* Copyright 2019 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "test/time_controller/simulated_time_controller.h"
#include <atomic>
#include <memory>
#include "rtc_base/task_queue.h"
#include "rtc_base/task_utils/repeating_task.h"
#include "test/gmock.h"
#include "test/gtest.h"
// NOTE: Since these tests rely on real time behavior, they will be flaky
// if run on heavily loaded systems.
namespace webrtc {
namespace {
using ::testing::AtLeast;
using ::testing::Invoke;
using ::testing::MockFunction;
using ::testing::NiceMock;
using ::testing::Return;
constexpr Timestamp kStartTime = Timestamp::Seconds<1000>();
} // namespace
TEST(SimulatedTimeControllerTest, TaskIsStoppedOnStop) {
const TimeDelta kShortInterval = TimeDelta::ms(5);
const TimeDelta kLongInterval = TimeDelta::ms(20);
const int kShortIntervalCount = 4;
const int kMargin = 1;
GlobalSimulatedTimeController time_simulation(kStartTime);
rtc::TaskQueue task_queue(
time_simulation.GetTaskQueueFactory()->CreateTaskQueue(
"TestQueue", TaskQueueFactory::Priority::NORMAL));
std::atomic_int counter(0);
auto handle = RepeatingTaskHandle::Start(task_queue.Get(), [&] {
if (++counter >= kShortIntervalCount)
return kLongInterval;
return kShortInterval;
});
// Sleep long enough to go through the initial phase.
time_simulation.AdvanceTime(kShortInterval * (kShortIntervalCount + kMargin));
EXPECT_EQ(counter.load(), kShortIntervalCount);
task_queue.PostTask(
[handle = std::move(handle)]() mutable { handle.Stop(); });
// Sleep long enough that the task would run at least once more if not
// stopped.
time_simulation.AdvanceTime(kLongInterval * 2);
EXPECT_EQ(counter.load(), kShortIntervalCount);
}
TEST(SimulatedTimeControllerTest, TaskCanStopItself) {
std::atomic_int counter(0);
GlobalSimulatedTimeController time_simulation(kStartTime);
rtc::TaskQueue task_queue(
time_simulation.GetTaskQueueFactory()->CreateTaskQueue(
"TestQueue", TaskQueueFactory::Priority::NORMAL));
RepeatingTaskHandle handle;
task_queue.PostTask([&] {
handle = RepeatingTaskHandle::Start(task_queue.Get(), [&] {
++counter;
handle.Stop();
return TimeDelta::ms(2);
});
});
time_simulation.AdvanceTime(TimeDelta::ms(10));
EXPECT_EQ(counter.load(), 1);
}
TEST(SimulatedTimeControllerTest, Example) {
class ObjectOnTaskQueue {
public:
void DoPeriodicTask() {}
TimeDelta TimeUntilNextRun() { return TimeDelta::ms(100); }
void StartPeriodicTask(RepeatingTaskHandle* handle,
rtc::TaskQueue* task_queue) {
*handle = RepeatingTaskHandle::Start(task_queue->Get(), [this] {
DoPeriodicTask();
return TimeUntilNextRun();
});
}
};
GlobalSimulatedTimeController time_simulation(kStartTime);
rtc::TaskQueue task_queue(
time_simulation.GetTaskQueueFactory()->CreateTaskQueue(
"TestQueue", TaskQueueFactory::Priority::NORMAL));
auto object = std::make_unique<ObjectOnTaskQueue>();
// Create and start the periodic task.
RepeatingTaskHandle handle;
object->StartPeriodicTask(&handle, &task_queue);
// Restart the task
task_queue.PostTask(
[handle = std::move(handle)]() mutable { handle.Stop(); });
object->StartPeriodicTask(&handle, &task_queue);
task_queue.PostTask(
[handle = std::move(handle)]() mutable { handle.Stop(); });
struct Destructor {
void operator()() { object.reset(); }
std::unique_ptr<ObjectOnTaskQueue> object;
};
task_queue.PostTask(Destructor{std::move(object)});
}
} // namespace webrtc