| // Copyright 2017 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "base/test/scoped_task_environment.h" |
| |
| #include <memory> |
| |
| #include "base/atomicops.h" |
| #include "base/bind.h" |
| #include "base/bind_helpers.h" |
| #include "base/synchronization/atomic_flag.h" |
| #include "base/synchronization/waitable_event.h" |
| #include "base/task_scheduler/post_task.h" |
| #include "base/test/test_timeouts.h" |
| #include "base/threading/platform_thread.h" |
| #include "base/threading/sequence_local_storage_slot.h" |
| #include "base/threading/thread_task_runner_handle.h" |
| #include "base/time/tick_clock.h" |
| #include "build_config.h" |
| #include "testing/gtest/include/gtest/gtest.h" |
| |
| #if defined(OS_POSIX) |
| #include <unistd.h> |
| #include "base/files/file_descriptor_watcher_posix.h" |
| #endif // defined(OS_POSIX) |
| |
| namespace base { |
| namespace test { |
| |
| namespace { |
| |
| class ScopedTaskEnvironmentTest |
| : public testing::TestWithParam<ScopedTaskEnvironment::MainThreadType> {}; |
| |
| void VerifyRunUntilIdleDidNotReturnAndSetFlag( |
| AtomicFlag* run_until_idle_returned, |
| AtomicFlag* task_ran) { |
| EXPECT_FALSE(run_until_idle_returned->IsSet()); |
| task_ran->Set(); |
| } |
| |
| void RunUntilIdleTest( |
| ScopedTaskEnvironment::MainThreadType main_thread_type, |
| ScopedTaskEnvironment::ExecutionMode execution_control_mode) { |
| AtomicFlag run_until_idle_returned; |
| ScopedTaskEnvironment scoped_task_environment(main_thread_type, |
| execution_control_mode); |
| |
| AtomicFlag first_main_thread_task_ran; |
| ThreadTaskRunnerHandle::Get()->PostTask( |
| FROM_HERE, BindOnce(&VerifyRunUntilIdleDidNotReturnAndSetFlag, |
| Unretained(&run_until_idle_returned), |
| Unretained(&first_main_thread_task_ran))); |
| |
| AtomicFlag first_task_scheduler_task_ran; |
| PostTask(FROM_HERE, BindOnce(&VerifyRunUntilIdleDidNotReturnAndSetFlag, |
| Unretained(&run_until_idle_returned), |
| Unretained(&first_task_scheduler_task_ran))); |
| |
| AtomicFlag second_task_scheduler_task_ran; |
| AtomicFlag second_main_thread_task_ran; |
| PostTaskAndReply(FROM_HERE, |
| BindOnce(&VerifyRunUntilIdleDidNotReturnAndSetFlag, |
| Unretained(&run_until_idle_returned), |
| Unretained(&second_task_scheduler_task_ran)), |
| BindOnce(&VerifyRunUntilIdleDidNotReturnAndSetFlag, |
| Unretained(&run_until_idle_returned), |
| Unretained(&second_main_thread_task_ran))); |
| |
| scoped_task_environment.RunUntilIdle(); |
| run_until_idle_returned.Set(); |
| |
| EXPECT_TRUE(first_main_thread_task_ran.IsSet()); |
| EXPECT_TRUE(first_task_scheduler_task_ran.IsSet()); |
| EXPECT_TRUE(second_task_scheduler_task_ran.IsSet()); |
| EXPECT_TRUE(second_main_thread_task_ran.IsSet()); |
| } |
| |
| } // namespace |
| |
| TEST_P(ScopedTaskEnvironmentTest, QueuedRunUntilIdle) { |
| RunUntilIdleTest(GetParam(), ScopedTaskEnvironment::ExecutionMode::QUEUED); |
| } |
| |
| TEST_P(ScopedTaskEnvironmentTest, AsyncRunUntilIdle) { |
| RunUntilIdleTest(GetParam(), ScopedTaskEnvironment::ExecutionMode::ASYNC); |
| } |
| |
| // Verify that tasks posted to an ExecutionMode::QUEUED ScopedTaskEnvironment do |
| // not run outside of RunUntilIdle(). |
| TEST_P(ScopedTaskEnvironmentTest, QueuedTasksDoNotRunOutsideOfRunUntilIdle) { |
| ScopedTaskEnvironment scoped_task_environment( |
| GetParam(), ScopedTaskEnvironment::ExecutionMode::QUEUED); |
| |
| AtomicFlag run_until_idle_called; |
| PostTask(FROM_HERE, BindOnce( |
| [](AtomicFlag* run_until_idle_called) { |
| EXPECT_TRUE(run_until_idle_called->IsSet()); |
| }, |
| Unretained(&run_until_idle_called))); |
| PlatformThread::Sleep(TestTimeouts::tiny_timeout()); |
| run_until_idle_called.Set(); |
| scoped_task_environment.RunUntilIdle(); |
| |
| AtomicFlag other_run_until_idle_called; |
| PostTask(FROM_HERE, BindOnce( |
| [](AtomicFlag* other_run_until_idle_called) { |
| EXPECT_TRUE(other_run_until_idle_called->IsSet()); |
| }, |
| Unretained(&other_run_until_idle_called))); |
| PlatformThread::Sleep(TestTimeouts::tiny_timeout()); |
| other_run_until_idle_called.Set(); |
| scoped_task_environment.RunUntilIdle(); |
| } |
| |
| // Verify that a task posted to an ExecutionMode::ASYNC ScopedTaskEnvironment |
| // can run without a call to RunUntilIdle(). |
| TEST_P(ScopedTaskEnvironmentTest, AsyncTasksRunAsTheyArePosted) { |
| ScopedTaskEnvironment scoped_task_environment( |
| GetParam(), ScopedTaskEnvironment::ExecutionMode::ASYNC); |
| |
| WaitableEvent task_ran(WaitableEvent::ResetPolicy::MANUAL, |
| WaitableEvent::InitialState::NOT_SIGNALED); |
| PostTask(FROM_HERE, |
| BindOnce([](WaitableEvent* task_ran) { task_ran->Signal(); }, |
| Unretained(&task_ran))); |
| task_ran.Wait(); |
| } |
| |
| // Verify that a task posted to an ExecutionMode::ASYNC ScopedTaskEnvironment |
| // after a call to RunUntilIdle() can run without another call to |
| // RunUntilIdle(). |
| TEST_P(ScopedTaskEnvironmentTest, |
| AsyncTasksRunAsTheyArePostedAfterRunUntilIdle) { |
| ScopedTaskEnvironment scoped_task_environment( |
| GetParam(), ScopedTaskEnvironment::ExecutionMode::ASYNC); |
| |
| scoped_task_environment.RunUntilIdle(); |
| |
| WaitableEvent task_ran(WaitableEvent::ResetPolicy::MANUAL, |
| WaitableEvent::InitialState::NOT_SIGNALED); |
| PostTask(FROM_HERE, |
| BindOnce([](WaitableEvent* task_ran) { task_ran->Signal(); }, |
| Unretained(&task_ran))); |
| task_ran.Wait(); |
| } |
| |
| TEST_P(ScopedTaskEnvironmentTest, DelayedTasks) { |
| // Use a QUEUED execution-mode environment, so that no tasks are actually |
| // executed until RunUntilIdle()/FastForwardBy() are invoked. |
| ScopedTaskEnvironment scoped_task_environment( |
| GetParam(), ScopedTaskEnvironment::ExecutionMode::QUEUED); |
| |
| subtle::Atomic32 counter = 0; |
| |
| constexpr base::TimeDelta kShortTaskDelay = TimeDelta::FromDays(1); |
| // Should run only in MOCK_TIME environment when time is fast-forwarded. |
| ThreadTaskRunnerHandle::Get()->PostDelayedTask( |
| FROM_HERE, |
| Bind( |
| [](subtle::Atomic32* counter) { |
| subtle::NoBarrier_AtomicIncrement(counter, 4); |
| }, |
| Unretained(&counter)), |
| kShortTaskDelay); |
| // TODO(gab): This currently doesn't run because the TaskScheduler's clock |
| // isn't mocked but it should be. |
| PostDelayedTask(FROM_HERE, |
| Bind( |
| [](subtle::Atomic32* counter) { |
| subtle::NoBarrier_AtomicIncrement(counter, 128); |
| }, |
| Unretained(&counter)), |
| kShortTaskDelay); |
| |
| constexpr base::TimeDelta kLongTaskDelay = TimeDelta::FromDays(7); |
| // Same as first task, longer delays to exercise |
| // FastForwardUntilNoTasksRemain(). |
| ThreadTaskRunnerHandle::Get()->PostDelayedTask( |
| FROM_HERE, |
| Bind( |
| [](subtle::Atomic32* counter) { |
| subtle::NoBarrier_AtomicIncrement(counter, 8); |
| }, |
| Unretained(&counter)), |
| TimeDelta::FromDays(5)); |
| ThreadTaskRunnerHandle::Get()->PostDelayedTask( |
| FROM_HERE, |
| Bind( |
| [](subtle::Atomic32* counter) { |
| subtle::NoBarrier_AtomicIncrement(counter, 16); |
| }, |
| Unretained(&counter)), |
| kLongTaskDelay); |
| |
| ThreadTaskRunnerHandle::Get()->PostTask( |
| FROM_HERE, Bind( |
| [](subtle::Atomic32* counter) { |
| subtle::NoBarrier_AtomicIncrement(counter, 1); |
| }, |
| Unretained(&counter))); |
| PostTask(FROM_HERE, Bind( |
| [](subtle::Atomic32* counter) { |
| subtle::NoBarrier_AtomicIncrement(counter, 2); |
| }, |
| Unretained(&counter))); |
| |
| // This expectation will fail flakily if the preceding PostTask() is executed |
| // asynchronously, indicating a problem with the QUEUED execution mode. |
| int expected_value = 0; |
| EXPECT_EQ(expected_value, counter); |
| |
| // RunUntilIdle() should process non-delayed tasks only in all queues. |
| scoped_task_environment.RunUntilIdle(); |
| expected_value += 1; |
| expected_value += 2; |
| EXPECT_EQ(expected_value, counter); |
| |
| if (GetParam() == ScopedTaskEnvironment::MainThreadType::MOCK_TIME) { |
| // Delay inferior to the delay of the first posted task. |
| constexpr base::TimeDelta kInferiorTaskDelay = TimeDelta::FromSeconds(1); |
| static_assert(kInferiorTaskDelay < kShortTaskDelay, |
| "|kInferiorTaskDelay| should be " |
| "set to a value inferior to the first posted task's delay."); |
| scoped_task_environment.FastForwardBy(kInferiorTaskDelay); |
| EXPECT_EQ(expected_value, counter); |
| |
| scoped_task_environment.FastForwardBy(kShortTaskDelay - kInferiorTaskDelay); |
| expected_value += 4; |
| EXPECT_EQ(expected_value, counter); |
| |
| scoped_task_environment.FastForwardUntilNoTasksRemain(); |
| expected_value += 8; |
| expected_value += 16; |
| EXPECT_EQ(expected_value, counter); |
| } |
| } |
| |
| // Regression test for https://crbug.com/824770. |
| TEST_P(ScopedTaskEnvironmentTest, SupportsSequenceLocalStorageOnMainThread) { |
| ScopedTaskEnvironment scoped_task_environment( |
| GetParam(), ScopedTaskEnvironment::ExecutionMode::ASYNC); |
| |
| SequenceLocalStorageSlot<int> sls_slot; |
| sls_slot.Set(5); |
| EXPECT_EQ(5, sls_slot.Get()); |
| } |
| |
| #if defined(OS_POSIX) |
| TEST_F(ScopedTaskEnvironmentTest, SupportsFileDescriptorWatcherOnIOMainThread) { |
| ScopedTaskEnvironment scoped_task_environment( |
| ScopedTaskEnvironment::MainThreadType::IO, |
| ScopedTaskEnvironment::ExecutionMode::ASYNC); |
| |
| int pipe_fds_[2]; |
| ASSERT_EQ(0, pipe(pipe_fds_)); |
| |
| RunLoop run_loop; |
| |
| // The write end of a newly created pipe is immediately writable. |
| auto controller = FileDescriptorWatcher::WatchWritable( |
| pipe_fds_[1], run_loop.QuitClosure()); |
| |
| // This will hang if the notification doesn't occur as expected. |
| run_loop.Run(); |
| } |
| #endif // defined(OS_POSIX) |
| |
| // Verify that the TickClock returned by |
| // |ScopedTaskEnvironment::GetMockTickClock| gets updated when the |
| // FastForward(By|UntilNoTasksRemain) functions are called. |
| TEST_F(ScopedTaskEnvironmentTest, FastForwardAdvanceTickClock) { |
| // Use a QUEUED execution-mode environment, so that no tasks are actually |
| // executed until RunUntilIdle()/FastForwardBy() are invoked. |
| ScopedTaskEnvironment scoped_task_environment( |
| ScopedTaskEnvironment::MainThreadType::MOCK_TIME, |
| ScopedTaskEnvironment::ExecutionMode::QUEUED); |
| |
| constexpr base::TimeDelta kShortTaskDelay = TimeDelta::FromDays(1); |
| ThreadTaskRunnerHandle::Get()->PostDelayedTask(FROM_HERE, base::DoNothing(), |
| kShortTaskDelay); |
| |
| constexpr base::TimeDelta kLongTaskDelay = TimeDelta::FromDays(7); |
| ThreadTaskRunnerHandle::Get()->PostDelayedTask(FROM_HERE, base::DoNothing(), |
| kLongTaskDelay); |
| |
| const base::TickClock* tick_clock = |
| scoped_task_environment.GetMockTickClock(); |
| base::TimeTicks tick_clock_ref = tick_clock->NowTicks(); |
| |
| // Make sure that |FastForwardBy| advances the clock. |
| scoped_task_environment.FastForwardBy(kShortTaskDelay); |
| EXPECT_EQ(kShortTaskDelay, tick_clock->NowTicks() - tick_clock_ref); |
| |
| // Make sure that |FastForwardUntilNoTasksRemain| advances the clock. |
| scoped_task_environment.FastForwardUntilNoTasksRemain(); |
| EXPECT_EQ(kLongTaskDelay, tick_clock->NowTicks() - tick_clock_ref); |
| |
| // Fast-forwarding to a time at which there's no tasks should also advance the |
| // clock. |
| scoped_task_environment.FastForwardBy(kLongTaskDelay); |
| EXPECT_EQ(kLongTaskDelay * 2, tick_clock->NowTicks() - tick_clock_ref); |
| } |
| |
| INSTANTIATE_TEST_CASE_P( |
| MainThreadDefault, |
| ScopedTaskEnvironmentTest, |
| ::testing::Values(ScopedTaskEnvironment::MainThreadType::DEFAULT)); |
| INSTANTIATE_TEST_CASE_P( |
| MainThreadMockTime, |
| ScopedTaskEnvironmentTest, |
| ::testing::Values(ScopedTaskEnvironment::MainThreadType::MOCK_TIME)); |
| INSTANTIATE_TEST_CASE_P( |
| MainThreadUI, |
| ScopedTaskEnvironmentTest, |
| ::testing::Values(ScopedTaskEnvironment::MainThreadType::UI)); |
| INSTANTIATE_TEST_CASE_P( |
| MainThreadIO, |
| ScopedTaskEnvironmentTest, |
| ::testing::Values(ScopedTaskEnvironment::MainThreadType::IO)); |
| |
| } // namespace test |
| } // namespace base |
