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post_task_unittest.cc
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post_task_unittest.cc
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// Copyright 2018 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/task/post_task.h"
#include "base/bind_helpers.h"
#include "base/run_loop.h"
#include "base/task/scoped_set_task_priority_for_current_thread.h"
#include "base/task/task_executor.h"
#include "base/task/test_task_traits_extension.h"
#include "base/test/bind_test_util.h"
#include "base/test/gtest_util.h"
#include "base/test/task_environment.h"
#include "base/test/test_simple_task_runner.h"
#include "build/build_config.h"
#include "testing/gmock/include/gmock/gmock.h"
#include "testing/gtest/include/gtest/gtest.h"
using ::testing::_;
using ::testing::Invoke;
using ::testing::IsNull;
using ::testing::NotNull;
using ::testing::Return;
namespace base {
namespace {
class MockTaskExecutor : public TaskExecutor {
public:
MockTaskExecutor() {
ON_CALL(*this, PostDelayedTaskMock(_, _, _, _))
.WillByDefault(Invoke([this](const Location& from_here,
const TaskTraits& traits,
OnceClosure& task, TimeDelta delay) {
return runner_->PostDelayedTask(from_here, std::move(task), delay);
}));
ON_CALL(*this, CreateTaskRunner(_)).WillByDefault(Return(runner_));
ON_CALL(*this, CreateSequencedTaskRunner(_)).WillByDefault(Return(runner_));
ON_CALL(*this, CreateSingleThreadTaskRunner(_, _))
.WillByDefault(Return(runner_));
#if defined(OS_WIN)
ON_CALL(*this, CreateCOMSTATaskRunner(_, _)).WillByDefault(Return(runner_));
#endif // defined(OS_WIN)
}
// TaskExecutor:
// Helper because gmock doesn't support move-only types.
bool PostDelayedTask(const Location& from_here,
const TaskTraits& traits,
OnceClosure task,
TimeDelta delay) override {
return PostDelayedTaskMock(from_here, traits, task, delay);
}
MOCK_METHOD4(PostDelayedTaskMock,
bool(const Location& from_here,
const TaskTraits& traits,
OnceClosure& task,
TimeDelta delay));
MOCK_METHOD1(CreateTaskRunner,
scoped_refptr<TaskRunner>(const TaskTraits& traits));
MOCK_METHOD1(CreateSequencedTaskRunner,
scoped_refptr<SequencedTaskRunner>(const TaskTraits& traits));
MOCK_METHOD2(CreateSingleThreadTaskRunner,
scoped_refptr<SingleThreadTaskRunner>(
const TaskTraits& traits,
SingleThreadTaskRunnerThreadMode thread_mode));
#if defined(OS_WIN)
MOCK_METHOD2(CreateCOMSTATaskRunner,
scoped_refptr<SingleThreadTaskRunner>(
const TaskTraits& traits,
SingleThreadTaskRunnerThreadMode thread_mode));
#endif // defined(OS_WIN)
TestSimpleTaskRunner* runner() const { return runner_.get(); }
private:
scoped_refptr<TestSimpleTaskRunner> runner_ =
MakeRefCounted<TestSimpleTaskRunner>();
DISALLOW_COPY_AND_ASSIGN(MockTaskExecutor);
};
} // namespace
class PostTaskTestWithExecutor : public ::testing::Test {
public:
void SetUp() override {
RegisterTaskExecutor(TestTaskTraitsExtension::kExtensionId, &executor_);
}
void TearDown() override {
UnregisterTaskExecutorForTesting(TestTaskTraitsExtension::kExtensionId);
}
protected:
testing::StrictMock<MockTaskExecutor> executor_;
test::TaskEnvironment task_environment_;
};
TEST_F(PostTaskTestWithExecutor, PostTaskToThreadPool) {
// Tasks without extension should not go to the TestTaskExecutor.
EXPECT_TRUE(PostTask(FROM_HERE, DoNothing()));
EXPECT_FALSE(executor_.runner()->HasPendingTask());
EXPECT_TRUE(PostTask(FROM_HERE, {ThreadPool(), MayBlock()}, DoNothing()));
EXPECT_FALSE(executor_.runner()->HasPendingTask());
EXPECT_TRUE(PostTask(FROM_HERE, {ThreadPool()}, DoNothing()));
EXPECT_FALSE(executor_.runner()->HasPendingTask());
// Task runners without extension should not be the executor's.
auto task_runner = CreateTaskRunner({ThreadPool()});
EXPECT_NE(executor_.runner(), task_runner);
auto sequenced_task_runner = CreateSequencedTaskRunner({ThreadPool()});
EXPECT_NE(executor_.runner(), sequenced_task_runner);
auto single_thread_task_runner = CreateSingleThreadTaskRunner({ThreadPool()});
EXPECT_NE(executor_.runner(), single_thread_task_runner);
#if defined(OS_WIN)
auto comsta_task_runner = CreateCOMSTATaskRunner({ThreadPool()});
EXPECT_NE(executor_.runner(), comsta_task_runner);
#endif // defined(OS_WIN)
// Thread pool task runners should not be the executor's.
task_runner = CreateTaskRunner({ThreadPool()});
EXPECT_NE(executor_.runner(), task_runner);
sequenced_task_runner = CreateSequencedTaskRunner({ThreadPool()});
EXPECT_NE(executor_.runner(), sequenced_task_runner);
single_thread_task_runner = CreateSingleThreadTaskRunner({ThreadPool()});
EXPECT_NE(executor_.runner(), single_thread_task_runner);
#if defined(OS_WIN)
comsta_task_runner = CreateCOMSTATaskRunner({ThreadPool()});
EXPECT_NE(executor_.runner(), comsta_task_runner);
#endif // defined(OS_WIN)
}
TEST_F(PostTaskTestWithExecutor, PostTaskToTaskExecutor) {
// Tasks with extension should go to the executor.
{
TaskTraits traits = {TestExtensionBoolTrait()};
EXPECT_CALL(executor_, PostDelayedTaskMock(_, traits, _, _)).Times(1);
EXPECT_TRUE(PostTask(FROM_HERE, traits, DoNothing()));
EXPECT_TRUE(executor_.runner()->HasPendingTask());
executor_.runner()->ClearPendingTasks();
}
{
TaskTraits traits = {MayBlock(), TestExtensionBoolTrait()};
EXPECT_CALL(executor_, PostDelayedTaskMock(_, traits, _, _)).Times(1);
EXPECT_TRUE(PostTask(FROM_HERE, traits, DoNothing()));
EXPECT_TRUE(executor_.runner()->HasPendingTask());
executor_.runner()->ClearPendingTasks();
}
{
TaskTraits traits = {TestExtensionEnumTrait::kB, TestExtensionBoolTrait()};
EXPECT_CALL(executor_, PostDelayedTaskMock(_, traits, _, _)).Times(1);
EXPECT_TRUE(PostTask(FROM_HERE, traits, DoNothing()));
EXPECT_TRUE(executor_.runner()->HasPendingTask());
executor_.runner()->ClearPendingTasks();
}
// Task runners with extension should be the executor's.
{
TaskTraits traits = {TestExtensionBoolTrait()};
EXPECT_CALL(executor_, CreateTaskRunner(traits)).Times(1);
auto task_runner = CreateTaskRunner(traits);
EXPECT_EQ(executor_.runner(), task_runner);
EXPECT_CALL(executor_, CreateSequencedTaskRunner(traits)).Times(1);
auto sequenced_task_runner = CreateSequencedTaskRunner(traits);
EXPECT_EQ(executor_.runner(), sequenced_task_runner);
EXPECT_CALL(executor_, CreateSingleThreadTaskRunner(traits, _)).Times(1);
auto single_thread_task_runner = CreateSingleThreadTaskRunner(traits);
EXPECT_EQ(executor_.runner(), single_thread_task_runner);
#if defined(OS_WIN)
EXPECT_CALL(executor_, CreateCOMSTATaskRunner(traits, _)).Times(1);
auto comsta_task_runner = CreateCOMSTATaskRunner(traits);
EXPECT_EQ(executor_.runner(), comsta_task_runner);
#endif // defined(OS_WIN)
}
}
TEST_F(PostTaskTestWithExecutor,
ThreadPoolTaskRunnerGetTaskExecutorForCurrentThread) {
auto task_runner = CreateTaskRunner({ThreadPool()});
RunLoop run_loop;
EXPECT_TRUE(task_runner->PostTask(
FROM_HERE, BindLambdaForTesting([&]() {
// We don't have an executor for a ThreadPool task runner becuse they
// are for one shot tasks.
EXPECT_THAT(GetTaskExecutorForCurrentThread(), IsNull());
run_loop.Quit();
})));
run_loop.Run();
}
TEST_F(PostTaskTestWithExecutor,
ThreadPoolSequencedTaskRunnerGetTaskExecutorForCurrentThread) {
auto sequenced_task_runner = CreateSequencedTaskRunner({ThreadPool()});
RunLoop run_loop;
EXPECT_TRUE(sequenced_task_runner->PostTask(
FROM_HERE, BindLambdaForTesting([&]() {
EXPECT_THAT(GetTaskExecutorForCurrentThread(), NotNull());
run_loop.Quit();
})));
run_loop.Run();
}
TEST_F(PostTaskTestWithExecutor,
ThreadPoolSingleThreadTaskRunnerGetTaskExecutorForCurrentThread) {
auto single_thread_task_runner = CreateSingleThreadTaskRunner({ThreadPool()});
RunLoop run_loop;
EXPECT_TRUE(single_thread_task_runner->PostTask(
FROM_HERE, BindLambdaForTesting([&]() {
EXPECT_THAT(GetTaskExecutorForCurrentThread(), NotNull());
run_loop.Quit();
})));
run_loop.Run();
}
TEST_F(PostTaskTestWithExecutor, RegisterExecutorTwice) {
testing::FLAGS_gtest_death_test_style = "threadsafe";
EXPECT_DCHECK_DEATH(
RegisterTaskExecutor(TestTaskTraitsExtension::kExtensionId, &executor_));
}
TEST_F(PostTaskTestWithExecutor, PriorityInherited) {
internal::ScopedSetTaskPriorityForCurrentThread scoped_priority(
TaskPriority::BEST_EFFORT);
TaskTraits traits = {TestExtensionBoolTrait()};
TaskTraits traits_with_inherited_priority = traits;
traits_with_inherited_priority.InheritPriority(TaskPriority::BEST_EFFORT);
EXPECT_FALSE(traits_with_inherited_priority.priority_set_explicitly());
EXPECT_CALL(executor_,
PostDelayedTaskMock(_, traits_with_inherited_priority, _, _))
.Times(1);
EXPECT_TRUE(PostTask(FROM_HERE, traits, DoNothing()));
EXPECT_TRUE(executor_.runner()->HasPendingTask());
executor_.runner()->ClearPendingTasks();
}
} // namespace base