// Copyright (c) 2017, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

import 'dart:async';

/// Returns a [Future] that completes after the [event loop][] has run the given
/// number of [times] (20 by default).
///
/// [event loop]: https://medium.com/dartlang/dart-asynchronous-programming-isolates-and-event-loops-bffc3e296a6a
///
/// Awaiting this approximates waiting until all asynchronous work (other than
/// work that's waiting for external resources) completes.
Future pumpEventQueue({int times = 20}) {
  if (times == 0) return Future.value();
  // Use the event loop to allow the microtask queue to finish.
  return Future(() => pumpEventQueue(times: times - 1));
}