| // 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); |
| } |