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// Copyright 2014 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "third_party/blink/renderer/platform/scheduler/common/scheduler_helper.h"
#include "base/functional/bind.h"
#include "base/functional/callback.h"
#include "base/task/common/lazy_now.h"
#include "base/task/sequence_manager/task_queue.h"
#include "base/task/sequence_manager/test/sequence_manager_for_test.h"
#include "base/task/single_thread_task_runner.h"
#include "base/task/task_observer.h"
#include "base/test/task_environment.h"
#include "testing/gmock/include/gmock/gmock.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "third_party/blink/renderer/platform/scheduler/common/task_priority.h"
#include "third_party/blink/renderer/platform/scheduler/worker/non_main_thread_scheduler_helper.h"
#include "third_party/blink/renderer/platform/wtf/text/wtf_string.h"
#include "third_party/blink/renderer/platform/wtf/vector.h"
using testing::_;
using testing::AnyNumber;
using testing::Invoke;
using testing::Return;
namespace blink {
namespace scheduler {
namespace scheduler_helper_unittest {
namespace {
void AppendToVectorTestTask(Vector<String>* vector, String value) {
vector->push_back(value);
}
void AppendToVectorReentrantTask(base::SingleThreadTaskRunner* task_runner,
Vector<int>* vector,
int* reentrant_count,
int max_reentrant_count) {
vector->push_back((*reentrant_count)++);
if (*reentrant_count < max_reentrant_count) {
task_runner->PostTask(FROM_HERE,
base::BindOnce(AppendToVectorReentrantTask,
base::Unretained(task_runner), vector,
reentrant_count, max_reentrant_count));
}
}
} // namespace
class SchedulerHelperTest : public testing::Test {
public:
SchedulerHelperTest()
: task_environment_(
base::test::TaskEnvironment::TimeSource::MOCK_TIME,
base::test::TaskEnvironment::ThreadPoolExecutionMode::QUEUED) {
auto settings = base::sequence_manager::SequenceManager::Settings::Builder()
.SetPrioritySettings(CreatePrioritySettings())
.Build();
sequence_manager_ = base::sequence_manager::SequenceManagerForTest::Create(
nullptr, task_environment_.GetMainThreadTaskRunner(),
task_environment_.GetMockTickClock(), std::move(settings));
scheduler_helper_ = std::make_unique<NonMainThreadSchedulerHelper>(
sequence_manager_.get(), nullptr, TaskType::kInternalTest);
scheduler_helper_->AttachToCurrentThread();
default_task_runner_ = scheduler_helper_->DefaultTaskRunner();
}
SchedulerHelperTest(const SchedulerHelperTest&) = delete;
SchedulerHelperTest& operator=(const SchedulerHelperTest&) = delete;
~SchedulerHelperTest() override = default;
void TearDown() override {
// Check that all tests stop posting tasks.
task_environment_.FastForwardUntilNoTasksRemain();
EXPECT_EQ(0u, task_environment_.GetPendingMainThreadTaskCount());
}
template <typename E>
static void CallForEachEnumValue(E first,
E last,
const char* (*function)(E)) {
for (E val = first; val < last;
val = static_cast<E>(static_cast<int>(val) + 1)) {
(*function)(val);
}
}
protected:
base::test::TaskEnvironment task_environment_;
std::unique_ptr<base::sequence_manager::SequenceManagerForTest>
sequence_manager_;
std::unique_ptr<NonMainThreadSchedulerHelper> scheduler_helper_;
scoped_refptr<base::SingleThreadTaskRunner> default_task_runner_;
};
TEST_F(SchedulerHelperTest, TestPostDefaultTask) {
Vector<String> run_order;
default_task_runner_->PostTask(
FROM_HERE, base::BindOnce(&AppendToVectorTestTask, &run_order, "D1"));
default_task_runner_->PostTask(
FROM_HERE, base::BindOnce(&AppendToVectorTestTask, &run_order, "D2"));
default_task_runner_->PostTask(
FROM_HERE, base::BindOnce(&AppendToVectorTestTask, &run_order, "D3"));
default_task_runner_->PostTask(
FROM_HERE, base::BindOnce(&AppendToVectorTestTask, &run_order, "D4"));
task_environment_.RunUntilIdle();
EXPECT_THAT(run_order, testing::ElementsAre("D1", "D2", "D3", "D4"));
}
TEST_F(SchedulerHelperTest, TestRentrantTask) {
int count = 0;
Vector<int> run_order;
default_task_runner_->PostTask(
FROM_HERE, base::BindOnce(AppendToVectorReentrantTask,
base::RetainedRef(default_task_runner_),
&run_order, &count, 5));
task_environment_.RunUntilIdle();
EXPECT_THAT(run_order, testing::ElementsAre(0, 1, 2, 3, 4));
}
TEST_F(SchedulerHelperTest, IsShutdown) {
EXPECT_FALSE(scheduler_helper_->IsShutdown());
scheduler_helper_->Shutdown();
EXPECT_TRUE(scheduler_helper_->IsShutdown());
}
TEST_F(SchedulerHelperTest, GetNumberOfPendingTasks) {
Vector<String> run_order;
scheduler_helper_->DefaultTaskRunner()->PostTask(
FROM_HERE, base::BindOnce(&AppendToVectorTestTask, &run_order, "D1"));
scheduler_helper_->DefaultTaskRunner()->PostTask(
FROM_HERE, base::BindOnce(&AppendToVectorTestTask, &run_order, "D2"));
scheduler_helper_->ControlNonMainThreadTaskQueue()
->GetTaskRunnerWithDefaultTaskType()
->PostTask(FROM_HERE,
base::BindOnce(&AppendToVectorTestTask, &run_order, "C1"));
EXPECT_EQ(3U, sequence_manager_->PendingTasksCount());
task_environment_.RunUntilIdle();
EXPECT_EQ(0U, sequence_manager_->PendingTasksCount());
}
namespace {
class MockTaskObserver : public base::TaskObserver {
public:
MOCK_METHOD1(DidProcessTask, void(const base::PendingTask& task));
MOCK_METHOD2(WillProcessTask,
void(const base::PendingTask& task,
bool was_blocked_or_low_priority));
};
void NopTask() {}
} // namespace
TEST_F(SchedulerHelperTest, ObserversNotifiedFor_DefaultTaskRunner) {
MockTaskObserver observer;
scheduler_helper_->AddTaskObserver(&observer);
scheduler_helper_->DefaultTaskRunner()->PostTask(FROM_HERE,
base::BindOnce(&NopTask));
EXPECT_CALL(observer, WillProcessTask(_, _)).Times(1);
EXPECT_CALL(observer, DidProcessTask(_)).Times(1);
task_environment_.RunUntilIdle();
}
TEST_F(SchedulerHelperTest, ObserversNotNotifiedFor_ControlTaskQueue) {
MockTaskObserver observer;
scheduler_helper_->AddTaskObserver(&observer);
scheduler_helper_->ControlNonMainThreadTaskQueue()
->GetTaskRunnerWithDefaultTaskType()
->PostTask(FROM_HERE, base::BindOnce(&NopTask));
EXPECT_CALL(observer, WillProcessTask(_, _)).Times(0);
EXPECT_CALL(observer, DidProcessTask(_)).Times(0);
task_environment_.RunUntilIdle();
}
} // namespace scheduler_helper_unittest
} // namespace scheduler
} // namespace blink
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