blob: 8312771feaf368067e386419fcb43b5d86e239fd [file] [log] [blame]
// 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 onCancel is provided, it is called in a similar way to onListen when
/// the returned stream stops having listener. If it later gets a new listener,
/// the onListen function is called again.
/// @description Checks that onCancel callback is called when broadcast stream
/// stops having listeners because the underlying stream ends.
/// @author ilya
library asBroadcastStream_A04_t01;
import "dart:async";
import "../../../Utils/expect.dart";
void test(CreateStreamFunction create) {
Stream<int> s = create([1, 2, 3]);
Stream<int> b = s.asBroadcastStream(
onCancel: (StreamSubscription<int> subs) {
b.listen((_) {});
b.listen((_) {});
b.listen((_) {});