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   virtual bool PostDelayedTask(const tracked_objects::Location& from_here,
  19                                const base::Closure& task,
  20                                base::TimeDelta delay) OVERRIDE;
  21   virtual bool PostNonNestableDelayedTask(
  22       const tracked_objects::Location& from_here,
  23       const base::Closure& task,
  24       base::TimeDelta delay) OVERRIDE;
  25   // Always returns true to avoid triggering DCHECKs.
  26   virtual bool RunsTasksOnCurrentThread() const OVERRIDE;
  27
  28  protected:
  29   virtual ~NullTaskRunner();
  30
  31   DISALLOW_COPY_AND_ASSIGN(NullTaskRunner);
  32 };
  33
  34 }  // namespace