| /* |
| * 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({void onListen(), void onPause(), |
| * void onResume(), dynamic onCancel(), bool sync: false}) |
| * The onListen callback is called when the stream receives its listener |
| * and onCancel when the listener ends its subscription. |
| * |
| * @description Checks that the onListen function is called when the stream |
| * receives its listener. |
| * @author kaigorodov |
| */ |
| import "dart:async"; |
| import "../../../Utils/expect.dart"; |
| |
| main() { |
| bool onListenCalled = false; |
| asyncStart(); |
| StreamController controller = new StreamController( |
| onListen: () { |
| onListenCalled = true; |
| asyncEnd(); |
| } |
| ); |
| |
| Expect.isFalse(onListenCalled); |
| StreamSubscription subs = controller.stream.listen((event) {}); |
| Expect.isTrue(onListenCalled); |
| } |