TaskScheduler: Remove base/task_scheduler/utils.h/.cc

base/task_scheduler/utils_unittest.cc

-// Copyright 2016 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_scheduler/utils.h"
-
-#include <memory>
-
-#include "base/bind.h"
-#include "base/bind_helpers.h"
-#include "base/memory/ptr_util.h"
-#include "base/memory/ref_counted.h"
-#include "base/task_scheduler/delayed_task_manager.h"
-#include "base/task_scheduler/priority_queue.h"
-#include "base/task_scheduler/scheduler_task_executor.h"
-#include "base/task_scheduler/sequence.h"
-#include "base/task_scheduler/task.h"
-#include "base/task_scheduler/task_tracker.h"
-#include "testing/gmock/include/gmock/gmock.h"
-#include "testing/gtest/include/gtest/gtest.h"
-
-namespace base {
-namespace internal {
-namespace {
-
-class MockSchedulerTaskExecutor : public SchedulerTaskExecutor {
- public:
-  void PostTaskWithSequence(std::unique_ptr<Task> task,
-                            scoped_refptr<Sequence> sequence) override {
-    PostTaskWithSequenceMock(task.get(), sequence.get());
-  }
-
-  MOCK_METHOD2(PostTaskWithSequenceMock,
-               void(const Task* task, const Sequence* sequence));
-};
-
-// Verifies that when PostTaskToExecutor receives a non-delayed Task that is
-// allowed to be posted, it forwards it to a SchedulerTaskExecutor.
-TEST(TaskSchedulerPostTaskToExecutorTest, PostTaskAllowed) {
-  std::unique_ptr<Task> task(
-      new Task(FROM_HERE, Bind(&DoNothing), TaskTraits(), TimeTicks()));
-  const Task* task_raw = task.get();
-  scoped_refptr<Sequence> sequence(new Sequence);
-  testing::StrictMock<MockSchedulerTaskExecutor> executor;
-  TaskTracker task_tracker;
-  DelayedTaskManager delayed_task_manager(Bind(&DoNothing));
-
-  EXPECT_CALL(executor, PostTaskWithSequenceMock(task_raw, sequence.get()));
-  PostTaskToExecutor(std::move(task), sequence, &executor, &task_tracker,
-                     &delayed_task_manager);
-}
-
-// Verifies that when PostTaskToExecutor receives a delayed Task that is allowed
-// to be posted, it forwards it to a DelayedTaskManager.
-TEST(TaskSchedulerPostTaskToExecutorTest, PostDelayedTaskAllowed) {
-  scoped_refptr<Sequence> sequence(new Sequence);
-  testing::StrictMock<MockSchedulerTaskExecutor> executor;
-  TaskTracker task_tracker;
-  DelayedTaskManager delayed_task_manager(Bind(&DoNothing));
-
-  EXPECT_TRUE(delayed_task_manager.GetDelayedRunTime().is_null());
-  PostTaskToExecutor(
-      WrapUnique(new Task(FROM_HERE, Bind(&DoNothing), TaskTraits(),
-                          TimeTicks::Now() + TimeDelta::FromSeconds(10))),
-      sequence, &executor, &task_tracker, &delayed_task_manager);
-  EXPECT_FALSE(delayed_task_manager.GetDelayedRunTime().is_null());
-}
-
-// Verifies that when PostTaskToExecutor receives a Task that isn't allowed to
-// be posted, it doesn't forward it to a SchedulerTaskExecutor.
-TEST(TaskSchedulerPostTaskToExecutorTest, PostTaskNotAllowed) {
-  // Use a strict mock to ensure that the test fails when there is an unexpected
-  // call to the mock method of |executor|.
-  testing::StrictMock<MockSchedulerTaskExecutor> executor;
-  TaskTracker task_tracker;
-  DelayedTaskManager delayed_task_manager(Bind(&DoNothing));
-  task_tracker.Shutdown();
-
-  PostTaskToExecutor(WrapUnique(new Task(FROM_HERE, Bind(&DoNothing),
-                                         TaskTraits(), TimeTicks())),
-                     make_scoped_refptr(new Sequence), &executor, &task_tracker,
-                     &delayed_task_manager);
-}
-
-// Verifies that when AddTaskToSequenceAndPriorityQueue is called with an empty
-// sequence, the task is added to the sequence and the sequence is added to the
-// priority queue.
-TEST(TaskSchedulerAddTaskToSequenceAndPriorityQueueTest,
-     PostTaskInEmptySequence) {
-  std::unique_ptr<Task> task(
-      new Task(FROM_HERE, Bind(&DoNothing), TaskTraits(), TimeTicks()));
-  const Task* task_raw = task.get();
-  scoped_refptr<Sequence> sequence(new Sequence);
-  PriorityQueue priority_queue;
-
-  // Post |task|.
-  EXPECT_TRUE(AddTaskToSequenceAndPriorityQueue(std::move(task), sequence,
-                                                &priority_queue));
-
-  // Expect to find the sequence in the priority queue.
-  EXPECT_EQ(sequence, priority_queue.BeginTransaction()->Peek().sequence);
-
-  // Expect to find |task| alone in |sequence|.
-  EXPECT_EQ(task_raw, sequence->PeekTask());
-  sequence->PopTask();
-  EXPECT_EQ(nullptr, sequence->PeekTask());
-}
-
-// Verifies that when AddTaskToSequenceAndPriorityQueue is called with a
-// sequence that already contains a task, the task is added to the sequence but
-// the sequence is not added to the priority queue.
-TEST(TaskSchedulerAddTaskToSequenceAndPriorityQueueTest,
-     PostTaskInNonEmptySequence) {
-  std::unique_ptr<Task> task(
-      new Task(FROM_HERE, Bind(&DoNothing), TaskTraits(), TimeTicks()));
-  const Task* task_raw = task.get();
-  scoped_refptr<Sequence> sequence(new Sequence);
-  PriorityQueue priority_queue;
-
-  // Add an initial task in |sequence|.
-  sequence->PushTask(WrapUnique(
-      new Task(FROM_HERE, Bind(&DoNothing), TaskTraits(), TimeTicks())));
-
-  // Post |task|.
-  EXPECT_FALSE(AddTaskToSequenceAndPriorityQueue(std::move(task), sequence,
-                                                 &priority_queue));
-
-  // Expect to find the priority queue empty.
-  EXPECT_TRUE(priority_queue.BeginTransaction()->Peek().is_null());
-
-  // Expect to find |task| in |sequence| behind the initial task.
-  EXPECT_NE(task_raw, sequence->PeekTask());
-  sequence->PopTask();
-  EXPECT_EQ(task_raw, sequence->PeekTask());
-  sequence->PopTask();
-  EXPECT_EQ(nullptr, sequence->PeekTask());
-}
-
-}  // namespace
-}  // namespace internal
-}  // namespace base

[gab, 2016/04/22 18:53:56]

Is this functionality already fully covered by the existing SchedulerThreadPool
tests?

[fdoray, 2016/04/22 22:18:14]

PostTaskAllowed and PostTaskInEmptySequence are covered by
STPTest::PostTasksWaitAllThreadsIdle

PostTaskInNonEmptySequence is covered by STPTest::PostTasks

Added STPTest::PostTaskAfterShutdown and STPTest::PostDelayedTask to cover the
existing PostDelayedTaskAllowed and PostTaskNotAllowed.