| // 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"; |
| import "package:expect/expect.dart"; |
| import "package:async_helper/async_helper.dart"; |
| |
| // Regression test for http://dartbug.com/27205 |
| // If a yield-star completes while the stream is paused, it didn't resume. |
| |
| main() { |
| asyncTest(() { |
| var c = new Completer(); |
| var s = yieldStream(mkStream()); |
| var sub; |
| sub = s.listen((v) { |
| sub.pause(); |
| print(v); |
| Timer.run(sub.resume); |
| }, onDone: () { |
| print("DONE"); |
| c.complete(null); |
| }); |
| return c.future; |
| }); |
| } |
| |
| Stream yieldStream(Stream s) async* { |
| yield* s; |
| } |
| |
| Stream mkStream() { |
| var s = new StreamController(sync: true); |
| // The close event has to be sent and received between |
| // the pause and resume above. |
| // Using a sync controller and a Timer.run(sub.resume) ensures this. |
| Timer.run(() { |
| s.add("event"); |
| s.close(); |
| }); |
| return s.stream; |
| } |