/*
 *  Copyright 2018 The WebRTC Project Authors. All rights reserved.
 *
 *  Use of this source code is governed by a BSD-style license
 *  that can be found in the LICENSE file in the root of the source
 *  tree. An additional intellectual property rights grant can be found
 *  in the file PATENTS.  All contributing project authors may
 *  be found in the AUTHORS file in the root of the source tree.
 */

#ifndef RTC_BASE_TASK_QUEUE_FOR_TEST_H_
#define RTC_BASE_TASK_QUEUE_FOR_TEST_H_

#include "rtc_base/checks.h"
#include "rtc_base/constructor_magic.h"
#include "rtc_base/event.h"
#include "rtc_base/task_queue.h"
#include "rtc_base/task_utils/to_queued_task.h"
#include "rtc_base/thread_annotations.h"

namespace rtc {
namespace test {
class RTC_LOCKABLE TaskQueueForTest : public TaskQueue {
 public:
  explicit TaskQueueForTest(const char* queue_name,
                            Priority priority = Priority::NORMAL);
  ~TaskQueueForTest();

  // A convenience, test-only method that blocks the current thread while
  // a task executes on the task queue.
  // This variant is specifically for posting custom QueuedTask derived
  // implementations that tests do not want to pass ownership of over to the
  // task queue (i.e. the Run() method always returns |false|.).
  template <class Closure>
  void SendTask(Closure* task) {
    RTC_DCHECK(!IsCurrent());
    rtc::Event event;
    PostTask(webrtc::ToQueuedTask(
        [&task]() {
          RTC_CHECK_EQ(false, static_cast<QueuedTask*>(task)->Run());
        },
        [&event]() { event.Set(); }));
    event.Wait(rtc::Event::kForever);
  }

  // A convenience, test-only method that blocks the current thread while
  // a task executes on the task queue.
  template <class Closure>
  void SendTask(Closure&& task) {
    RTC_DCHECK(!IsCurrent());
    rtc::Event event;
    PostTask(webrtc::ToQueuedTask(std::forward<Closure>(task),
                                  [&event] { event.Set(); }));
    event.Wait(rtc::Event::kForever);
  }

 private:
  RTC_DISALLOW_COPY_AND_ASSIGN(TaskQueueForTest);
};
}  // namespace test
}  // namespace rtc

#endif  // RTC_BASE_TASK_QUEUE_FOR_TEST_H_