base/test/null_task_runner.h

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "base/basictypes.h"
   6 #include "base/compiler_specific.h"
   7 #include "base/single_thread_task_runner.h"
   8
   9 namespace base {
  10
  11 // Helper class for tests that need to provide an implementation of a
  12 // *TaskRunner class but don't actually care about tasks being run.
  13
  14 class NullTaskRunner : public base::SingleThreadTaskRunner {
  15  public:
  16   NullTaskRunner();
  17
  18   bool PostDelayedTask(const tracked_objects::Location& from_here,
  19                        const base::Closure& task,
  20                        base::TimeDelta delay) override;
  21   bool PostNonNestableDelayedTask(const tracked_objects::Location& from_here,
  22                                   const base::Closure& task,
  23                                   base::TimeDelta delay) override;
  24   // Always returns true to avoid triggering DCHECKs.
  25   bool RunsTasksOnCurrentThread() const override;
  26
  27  protected:
  28   ~NullTaskRunner() override;
  29
  30   DISALLOW_COPY_AND_ASSIGN(NullTaskRunner);
  31 };
  32
  33 }  // namespace