| /* |
| * 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 the only subscription to broadcast stream cancel, |
| * broadcast stream unsubscribes from underlying stream. |
| * @author ilya |
| */ |
| |
| import "dart:async"; |
| import "dart:isolate"; |
| import "../../../Utils/async_utils.dart"; |
| import "../../../Utils/expect.dart"; |
| import "IsolateStream.dart" as IsolateStream; |
| |
| main() { |
| var s = IsolateStream.fromIterable([0,1,2,3]); |
| var b = s.asBroadcastStream(); |
| |
| asyncStart(); |
| |
| StreamSubscription subs = b.listen(null); |
| |
| subs.onData((i) { |
| if (i>0) { |
| Expect.fail('Subscription is still alive'); |
| } |
| subs.cancel(); |
| asyncEnd(); |
| }); |
| subs.onDone(() { |
| Expect.fail('onDone event after cancel'); |
| }); |
| } |
| |