| // Copyright (c) 2016, 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 pumping the event queue [times] |
| /// times. |
| /// |
| /// By default, this should pump the event queue enough times to allow any code |
| /// to run, as long as it's not waiting on some external event. |
| Future pumpEventQueue([int times = 20]) { |
| if (times == 0) return new Future.value(); |
| // Use [new Future] future to allow microtask events to finish. The [new |
| // Future.value] constructor uses scheduleMicrotask itself and would therefore |
| // not wait for microtask callbacks that are scheduled after invoking this |
| // method. |
| return new Future(() => pumpEventQueue(times - 1)); |
| } |
