blob: 8ed339526d0bb57952fe0e3bf0e8cfde5ec3a91c [file] [log] [blame]
// 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.
#include "base/callback.h"
#include "base/compiler_specific.h"
#include "base/macros.h"
#include "base/single_thread_task_runner.h"
namespace base {
// ATTENTION: Prefer SingleThreadTaskEnvironment or TaskEnvironment w/
// ThreadPoolExecutionMode::QUEUED over this class. A NullTaskRunner might seem
// appealing, but not running tasks is under-testing the potential side-effects
// of the code under tests. All tests should be okay if tasks born from their
// actions are run or deleted at a later point.
// 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 {
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;
~NullTaskRunner() override;
} // namespace base