Index: base/test/test_mock_time_task_runner.h |
diff --git a/base/test/test_mock_time_task_runner.h b/base/test/test_mock_time_task_runner.h |
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-// Copyright 2015 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. |
- |
-#ifndef BASE_TEST_TEST_MOCK_TIME_TASK_RUNNER_H_ |
-#define BASE_TEST_TEST_MOCK_TIME_TASK_RUNNER_H_ |
- |
-#include <queue> |
-#include <vector> |
- |
-#include "base/macros.h" |
-#include "base/memory/scoped_ptr.h" |
-#include "base/single_thread_task_runner.h" |
-#include "base/synchronization/lock.h" |
-#include "base/test/test_pending_task.h" |
-#include "base/threading/thread_checker.h" |
-#include "base/time/tick_clock.h" |
-#include "base/time/time.h" |
- |
-namespace base { |
- |
-// Runs pending tasks in the order of the tasks' post time + delay, and keeps |
-// track of a mock (virtual) tick clock time that can be fast-forwarded. |
-// |
-// TestMockTimeTaskRunner has the following properties: |
-// |
-// - Methods RunsTasksOnCurrentThread() and Post[Delayed]Task() can be called |
-// from any thread, but the rest of the methods must be called on the same |
-// thread the TaskRunner was created on. |
-// - It allows for reentrancy, in that it handles the running of tasks that in |
-// turn call back into it (e.g., to post more tasks). |
-// - Tasks are stored in a priority queue, and executed in the increasing |
-// order of post time + delay. |
-// - Non-nestable tasks are not supported. |
-// - Tasks aren't guaranteed to be destroyed immediately after they're run. |
-// |
-// This is a slightly more sophisticated version of TestSimpleTaskRunner, in |
-// that it supports running delayed tasks in the correct temporal order. |
-class TestMockTimeTaskRunner : public base::SingleThreadTaskRunner { |
- public: |
- TestMockTimeTaskRunner(); |
- |
- // Fast-forwards virtual time by |delta|, causing all tasks with a remaining |
- // delay less than or equal to |delta| to be executed. |
- void FastForwardBy(base::TimeDelta delta); |
- |
- // Fast-forwards virtual time just until all tasks are executed. |
- void FastForwardUntilNoTasksRemain(); |
- |
- // Executes all tasks that have no remaining delay. Tasks with a remaining |
- // delay greater than zero will remain enqueued, and no virtual time will |
- // elapse. |
- void RunUntilIdle(); |
- |
- // Returns the current virtual time. |
- TimeTicks GetCurrentMockTime() const; |
- |
- // Returns a TickClock that uses the mock time of |this| as its time source. |
- scoped_ptr<TickClock> GetMockTickClock() const; |
- |
- bool HasPendingTask() const; |
- TimeDelta NextPendingTaskDelay() const; |
- |
- // SingleThreadTaskRunner: |
- bool RunsTasksOnCurrentThread() const override; |
- bool PostDelayedTask(const tracked_objects::Location& from_here, |
- const base::Closure& task, |
- TimeDelta delay) override; |
- bool PostNonNestableDelayedTask( |
- const tracked_objects::Location& from_here, |
- const base::Closure& task, |
- TimeDelta delay) override; |
- |
- protected: |
- ~TestMockTimeTaskRunner() override; |
- |
- // Called before the next task to run is selected, so that subclasses have a |
- // last chance to make sure all tasks are posted. |
- virtual void OnBeforeSelectingTask(); |
- |
- // Called after the current mock time has been incremented so that subclasses |
- // can react to the passing of time. |
- virtual void OnAfterTimePassed(); |
- |
- // Called after each task is run so that subclasses may perform additional |
- // activities, e.g., pump additional task runners. |
- virtual void OnAfterTaskRun(); |
- |
- private: |
- // Predicate that defines a strict weak temporal ordering of tasks. |
- class TemporalOrder { |
- public: |
- bool operator()(const TestPendingTask& first_task, |
- const TestPendingTask& second_task) const; |
- }; |
- |
- typedef std::priority_queue<TestPendingTask, |
- std::vector<TestPendingTask>, |
- TemporalOrder> TaskPriorityQueue; |
- |
- // Returns the |next_task| to run if there is any with a running time that is |
- // at most |reference| + |max_delta|. This additional complexity is required |
- // so that |max_delta| == TimeDelta::Max() can be supported. |
- bool DequeueNextTask(const base::TimeTicks& reference, |
- const base::TimeDelta& max_delta, |
- TestPendingTask* next_task); |
- |
- base::ThreadChecker thread_checker_; |
- base::TimeTicks now_; |
- |
- // Temporally ordered heap of pending tasks. Must only be accessed while the |
- // |tasks_lock_| is held. |
- TaskPriorityQueue tasks_; |
- base::Lock tasks_lock_; |
- |
- DISALLOW_COPY_AND_ASSIGN(TestMockTimeTaskRunner); |
-}; |
- |
-} // namespace base |
- |
-#endif // BASE_TEST_TEST_MOCK_TIME_TASK_RUNNER_H_ |