| // 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 returned stream is indeed a multi-subscription |
| * stream and it produces the same events as this. |
| * @author kaigorodov |
| */ |
| import "dart:async"; |
| import "../../../Utils/expect.dart"; |
| import "IsolateStream.dart" as IsolateStream; |
| |
| check(List events0) { |
| Stream s0 = IsolateStream.fromIterable(events0); |
| Stream s1 = s0.asBroadcastStream(); |
| |
| List events1 = new List.empty(growable: true); |
| StreamSubscription ss1 = s1.listen((event) { |
| events1.add(event); |
| }); |
| asyncStart(); |
| ss1.onDone(() { |
| Expect.listEquals(events0, events1); |
| asyncEnd(); |
| }); |
| |
| List events2 = new List.empty(growable: true); |
| StreamSubscription ss2 = s1.listen((event) { |
| events2.add(event); |
| }); |
| asyncStart(); |
| ss2.onDone(() { |
| Expect.listEquals(events0, events2); |
| asyncEnd(); |
| }); |
| } |
| |
| main() { |
| check([]); |
| check([1, 2, null, []]); |
| } |