| // 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 Stream<T> asBroadcastStream ({void onListen(StreamSubscription<T> |
| /// subscription), void onCancel(StreamSubscription<T> subscription)}) |
| /// Returns a multi-subscription stream that produces the same events as this. |
| /// If this stream is single-subscription, return a new stream that allows multiple subscribers. |
| /// It will subscribe to this stream when its first subscriber is added, |
| /// and will stay subscribed until this stream ends, or a callback cancels the subscription. |
| /// @description Checks that if this stream is single-subscription, |
| /// returned stream is indeed a broadcast stream. |
| /// @author kaigorodov |
| |
| import "dart:async"; |
| import "dart:isolate"; |
| import "../../../Utils/expect.dart"; |
| |
| main() { |
| ReceivePort s1 = new ReceivePort(); |
| Stream s2 = s1.asBroadcastStream(); |
| Stream s3 = s2.asBroadcastStream(); |
| try { |
| Expect.isFalse(s1.isBroadcast); |
| Expect.isTrue(s2.isBroadcast); |
| Expect.isTrue(s3.isBroadcast); |
| } finally { |
| s1.close(); |
| } |
| } |