| /* |
| * 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 bool isBroadcast |
| * Reports whether this stream is a broadcast stream. |
| * @description Checks true is returned for a broadcast stream. |
| * @author kaigorodov |
| */ |
| import "dart:async"; |
| import "../../../Utils/expect.dart"; |
| class MyStreamSubscription<T> extends StreamSubscription<T> { |
| @override |
| Future<E> asFuture<E>([E? futureValue]) { |
| throw UnimplementedError(); |
| } |
| @override |
| Future<void> cancel() { |
| throw UnimplementedError(); |
| } |
| @override |
| void onData(void Function(T data)? handleData) { |
| } |
| @override |
| void onDone(void Function()? handleDone) { |
| } |
| @override |
| void onError(Function? handleError) { |
| } |
| @override |
| void pause([Future<void>? resumeSignal]) { |
| } |
| @override |
| void resume() { |
| } |
| @override |
| bool get isPaused => throw UnimplementedError(); |
| } |
| |
| class MyStream<T> extends Stream<T> { |
| StreamSubscription<T> listen(void onData(T event)?, |
| {Function? onError, void onDone()?, bool? cancelOnError}) |
| { |
| return new MyStreamSubscription(); |
| } |
| } |
| |
| main() { |
| Stream s = new MyStream().asBroadcastStream(); |
| |
| Expect.isTrue(s.isBroadcast); |
| } |