| // 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}) { |
| 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)); |
| } |
