| // Copyright (c) 2012 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_NULL_TASK_RUNNER_H_ |
| #define BASE_TEST_NULL_TASK_RUNNER_H_ |
| |
| #include "base/callback.h" |
| #include "base/compiler_specific.h" |
| #include "base/macros.h" |
| #include "base/single_thread_task_runner.h" |
| |
| namespace base { |
| |
| // ATTENTION: Prefer TaskEnvironment::ThreadPoolExecutionMode::QUEUED and |
| // a task runner obtained from base/task/post_task.h over this class. A |
| // NullTaskRunner might seem appealing, but not running tasks is under-testing |
| // the side-effects of the code under tests. ThreadPoolExecutionMode::QUEUED |
| // will delay execution until the end of the test (if not requested earlier) but |
| // will at least exercise the tasks posted as a side-effect of the test. |
| // |
| // Helper class for tests that need to provide an implementation of a |
| // *TaskRunner class but don't actually care about tasks being run. |
| class NullTaskRunner : public base::SingleThreadTaskRunner { |
| public: |
| NullTaskRunner(); |
| |
| bool PostDelayedTask(const Location& from_here, |
| base::OnceClosure task, |
| base::TimeDelta delay) override; |
| bool PostNonNestableDelayedTask(const Location& from_here, |
| base::OnceClosure task, |
| base::TimeDelta delay) override; |
| // Always returns true to avoid triggering DCHECKs. |
| bool RunsTasksInCurrentSequence() const override; |
| |
| protected: |
| ~NullTaskRunner() override; |
| |
| DISALLOW_COPY_AND_ASSIGN(NullTaskRunner); |
| }; |
| |
| } // namespace base |
| |
| #endif // BASE_TEST_NULL_TASK_RUNNER_H_ |