| // 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)}) |
| /// If onListen is provided, it is called with a subscription-like object that |
| /// represents the underlying subscription to this stream. It is possible to |
| /// pause, resume or cancel the subscription during the call to onListen. It |
| /// is not possible to change the event handlers, including using |
| /// StreamSubscription.asFuture. |
| /// @description Checks that it is a runtime error to try to change event |
| /// handlers for underlying subscription using StreamSubscription.asFuture. |
| /// @author ilya |
| /// @author a.semenov@unipro.ru |
| |
| import "dart:async"; |
| import "IsolateStream.dart" as IsolateStream; |
| import '../../../Utils/expect.dart'; |
| |
| bool testPassed = false; |
| |
| void finish() { |
| Expect.isTrue(testPassed); |
| asyncEnd(); |
| } |
| |
| main() { |
| asyncStart(); |
| var s = IsolateStream.fromIterable([], onDone: finish); |
| |
| s.asBroadcastStream(onListen: (StreamSubscription subs) { |
| try { |
| subs.asFuture().then((_) {}); |
| } catch (e) { |
| testPassed = true; |
| } |
| }).listen((_) {}); |
| } |