| // Copyright (c) 2015, 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. |
| |
| // @dart = 2.9 |
| |
| library async_star_pause_test; |
| |
| import "package:async_helper/async_helper.dart"; |
| import "package:expect/expect.dart"; |
| import "dart:async"; |
| |
| main() { |
| // await for pauses stream during body. |
| asyncTest(() async { |
| // Assumes await-for uses streamIterator. |
| var log = []; |
| var s = () async* { |
| for (int i = 0; i < 3; i++) { |
| log.add("$i-"); |
| yield i; |
| // Should pause here until next iteration of await-for loop. |
| log.add("$i+"); |
| } |
| }(); |
| await for (var i in s) { |
| log.add("$i?"); |
| await nextMicrotask(); |
| log.add("$i!"); |
| } |
| Expect.listEquals([ |
| "0-", |
| "0?", |
| "0!", |
| "0+", |
| "1-", |
| "1?", |
| "1!", |
| "1+", |
| "2-", |
| "2?", |
| "2!", |
| "2+" |
| ], log); |
| }); |
| } |
| |
| Future nextMicrotask() => new Future.microtask(() {}); |