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// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/webrtc/thread_wrapper.h"
#include <stdint.h>
#include "base/memory/raw_ptr.h"
#include "base/run_loop.h"
#include "base/synchronization/waitable_event.h"
#include "base/task/single_thread_task_runner.h"
#include "base/test/task_environment.h"
#include "base/threading/thread.h"
#include "testing/gmock/include/gmock/gmock.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "third_party/webrtc/api/task_queue/task_queue_factory.h"
#include "third_party/webrtc/api/task_queue/task_queue_test.h"
#include "third_party/webrtc_overrides/metronome_source.h"
#include "third_party/webrtc_overrides/test/metronome_like_task_queue_test.h"
#include "third_party/webrtc_overrides/timer_based_tick_provider.h"
namespace webrtc {
namespace {
using ::blink::MetronomeLikeTaskQueueTest;
using ::testing::InSequence;
using ::testing::Invoke;
using ::testing::MockFunction;
constexpr TimeDelta kTestDelay1 = TimeDelta::Millis(10);
constexpr TimeDelta kTestDelay2 = TimeDelta::Millis(20);
constexpr TimeDelta kTestDelay3 = TimeDelta::Millis(30);
constexpr TimeDelta kTestDelay4 = TimeDelta::Millis(40);
constexpr base::TimeDelta kMaxTestDelay = base::Milliseconds(40);
class ThreadWrapperTest : public testing::Test {
public:
// This method is used by the BlockingCallDuringBlockingCall test.
// It sends message to the main thread synchronously using BlockingCall().
void PingMainThread() {
MockFunction<void()> handler;
EXPECT_CALL(handler, Call);
thread_->BlockingCall(handler.AsStdFunction());
}
protected:
ThreadWrapperTest() : thread_(nullptr) {}
void SetUp() override {
ThreadWrapper::EnsureForCurrentMessageLoop();
thread_ = ThreadWrapper::current();
}
// ThreadWrapper destroys itself when |message_loop_| is destroyed.
base::test::SingleThreadTaskEnvironment task_environment_;
raw_ptr<ThreadWrapper> thread_;
};
TEST_F(ThreadWrapperTest, PostTask) {
MockFunction<void()> handler1;
MockFunction<void()> handler2;
MockFunction<void()> handler3;
MockFunction<void()> handler4;
thread_->PostTask(handler1.AsStdFunction());
thread_->PostTask(handler2.AsStdFunction());
thread_->PostTask(handler3.AsStdFunction());
thread_->PostTask(handler4.AsStdFunction());
InSequence in_seq;
EXPECT_CALL(handler1, Call);
EXPECT_CALL(handler2, Call);
EXPECT_CALL(handler3, Call);
EXPECT_CALL(handler4, Call);
base::RunLoop().RunUntilIdle();
}
TEST_F(ThreadWrapperTest, PostDelayedTask) {
MockFunction<void()> handler1;
MockFunction<void()> handler2;
MockFunction<void()> handler3;
MockFunction<void()> handler4;
thread_->PostDelayedHighPrecisionTask(handler1.AsStdFunction(), kTestDelay1);
thread_->PostDelayedHighPrecisionTask(handler2.AsStdFunction(), kTestDelay2);
thread_->PostDelayedHighPrecisionTask(handler3.AsStdFunction(), kTestDelay3);
thread_->PostDelayedHighPrecisionTask(handler4.AsStdFunction(), kTestDelay4);
InSequence in_seq;
EXPECT_CALL(handler1, Call);
EXPECT_CALL(handler2, Call);
EXPECT_CALL(handler3, Call);
EXPECT_CALL(handler4, Call);
base::RunLoop run_loop;
task_environment_.GetMainThreadTaskRunner()->PostDelayedTask(
FROM_HERE, run_loop.QuitClosure(), kMaxTestDelay);
run_loop.Run();
}
// Verify that BlockingCall() calls handler synchronously when called on the
// same thread.
TEST_F(ThreadWrapperTest, BlockingCallSameThread) {
MockFunction<void()> handler;
EXPECT_CALL(handler, Call);
thread_->BlockingCall(handler.AsStdFunction());
}
void InitializeWrapperForNewThread(ThreadWrapper** thread,
base::WaitableEvent* done_event) {
ThreadWrapper::EnsureForCurrentMessageLoop();
ThreadWrapper::current()->set_send_allowed(true);
*thread = ThreadWrapper::current();
done_event->Signal();
}
// Verify that BlockingCall() calls handler synchronously when called for a
// different thread.
TEST_F(ThreadWrapperTest, BlockingCallToOtherThread) {
ThreadWrapper::current()->set_send_allowed(true);
base::Thread second_thread("adWrapperTest");
second_thread.Start();
base::WaitableEvent initialized_event(
base::WaitableEvent::ResetPolicy::MANUAL,
base::WaitableEvent::InitialState::NOT_SIGNALED);
ThreadWrapper* target;
second_thread.task_runner()->PostTask(
FROM_HERE, base::BindOnce(&InitializeWrapperForNewThread, &target,
&initialized_event));
initialized_event.Wait();
ASSERT_TRUE(target != nullptr);
MockFunction<void()> handler;
EXPECT_CALL(handler, Call);
target->BlockingCall(handler.AsStdFunction());
}
// Verify that thread handles BlockingCall() while another BlockingCall() is
// pending. The test creates second thread and BlockingCall()s
// to that thread. handler calls PingMainThread() on the BlockingCall which
// tries to BlockingCall() to the main thread.
TEST_F(ThreadWrapperTest, BlockingCallDuringBlockingCall) {
ThreadWrapper::current()->set_send_allowed(true);
base::Thread second_thread("adWrapperTest");
second_thread.Start();
base::WaitableEvent initialized_event(
base::WaitableEvent::ResetPolicy::MANUAL,
base::WaitableEvent::InitialState::NOT_SIGNALED);
ThreadWrapper* target;
second_thread.task_runner()->PostTask(
FROM_HERE, base::BindOnce(&InitializeWrapperForNewThread, &target,
&initialized_event));
initialized_event.Wait();
ASSERT_TRUE(target != nullptr);
MockFunction<void()> handler;
EXPECT_CALL(handler, Call)
.WillOnce(Invoke(this, &ThreadWrapperTest::PingMainThread));
target->BlockingCall(handler.AsStdFunction());
}
// Provider needed for the MetronomeLikeTaskQueueTest suite.
class ThreadWrapperProvider : public blink::MetronomeLikeTaskQueueProvider {
public:
void Initialize() override {
ThreadWrapper::EnsureForCurrentMessageLoop();
thread_ = webrtc::Thread::Current();
}
base::TimeDelta DeltaToNextTick() const override {
base::TimeTicks now = base::TimeTicks::Now();
return blink::TimerBasedTickProvider::TimeSnappedToNextTick(
now, blink::TimerBasedTickProvider::kDefaultPeriod) -
now;
}
base::TimeDelta MetronomeTick() const override {
return blink::TimerBasedTickProvider::kDefaultPeriod;
}
webrtc::TaskQueueBase* TaskQueue() const override { return thread_; }
private:
// ThreadWrapper destroys itself when |message_loop_| is destroyed.
raw_ptr<webrtc::Thread> thread_;
};
// Instantiate suite to run all tests defined in
// third_party/webrtc_overrides/test/metronome_like_task_queue_test.h
INSTANTIATE_TEST_SUITE_P(
ThreadWrapper,
MetronomeLikeTaskQueueTest,
::testing::Values(std::make_unique<ThreadWrapperProvider>));
class ThreadWrapperTaskQueueFactory : public TaskQueueFactory {
public:
std::unique_ptr<TaskQueueBase, TaskQueueDeleter> CreateTaskQueue(
std::string_view name,
Priority priority) const override {
std::unique_ptr<webrtc::Thread> thread = webrtc::Thread::Create();
thread->Start();
return std::unique_ptr<webrtc::TaskQueueBase, webrtc::TaskQueueDeleter>(
thread.release());
}
};
std::unique_ptr<TaskQueueFactory> CreateTaskQueueFactory(
const webrtc::FieldTrialsView*) {
return std::make_unique<ThreadWrapperTaskQueueFactory>();
}
// Instantiate suite to run all tests defined in
// //third_party/webrtc/api/task_queue:task_queue_test.
INSTANTIATE_TEST_SUITE_P(ThreadWrapper,
TaskQueueTest,
::testing::Values(CreateTaskQueueFactory));
} // namespace
} // namespace webrtc
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