| // Copyright (c) 2011, 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. |
| |
| /// @assertion StreamController.broadcast({void onListen(), void onCancel(), |
| /// bool sync: false}) |
| /// If sync is false, the event will always be fired at a later time, after |
| /// the code adding the event has completed. In that case, no guarantees are |
| /// given with regard to when multiple listeners get the events, except that |
| /// each listener will get all events in the correct order. Each subscription |
| /// handles the events individually. If two events are sent on an async |
| /// controller with two listeners, one of the listeners may get both events |
| /// before the other listener gets any. A listener must be subscribed both when |
| /// the event is initiated (that is, when add is called) and when the event is |
| /// later delivered, in order to receive the event. |
| /// |
| /// @description Checks that if sync is false, the event will be passed to the |
| /// listener at a later time. |
| /// @author kaigorodov |
| |
| import "dart:async"; |
| import "../../../Utils/expect.dart"; |
| |
| main() { |
| StreamController controller = new StreamController.broadcast(sync: false); |
| Stream stream = controller.stream; |
| bool onDataCalled = false; |
| asyncStart(); |
| stream.listen( |
| (event) { |
| onDataCalled = true; |
| asyncEnd(); |
| } |
| ); |
| controller.add(1); |
| Expect.isFalse(onDataCalled); |
| controller.close(); |
| } |