blob: 38b91cee63dc45d3ab5f3ac22f85db3ebbaf0f74 [file] [log] [blame]
// Copyright (c) 2017, 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.
// @dart = 2.9
/// @assertion void add(List<int> data)
/// This function must not be called when a stream is currently being added using
/// [addStream].
/// @description Checks that calling the [add] when a stream is being added
/// causes error.
/// @author iarkh@unipro.ru
import "../../../Utils/expect.dart";
import "dart:async";
import "dart:io";
bool called = false;
class MyStreamConsumer extends StreamConsumer<List<int>> {
Future addStream(Stream<List> stream) {
stream.toList().then((x) { called = true; });
return new Future(() {});
}
Future close() { return new Future(() {} ); }
}
main() {
Stream<List<int>> aStream = new Stream<List<int>>.fromIterable([
[1, 2, 3, 4, 5]
]);
List<int> aList = [10, 20, 30, 40, 50];
StreamConsumer<List<int>> consumer = new MyStreamConsumer();
IOSink sink = new IOSink(consumer);
sink.addStream(aStream).then((x) {
new Future.delayed(new Duration(seconds: 3)).then((_) {
sink.close();
});
});
Expect.throws(() { sink.add(aList); }, (e) => e is StateError);
Expect.isFalse(called);
}