| // 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 Future pipe(StreamConsumer<T> streamConsumer) |
| /// Pipe the events of this stream into streamConsumer. |
| /// The events of this stream are added to streamConsumer using |
| /// [StreamConsumer.addStream]. The streamConsumer is closed when this stream |
| /// has been successfully added to it - when the future returned by addStream |
| /// completes without an error. |
| /// @description Checks that streamConsumer is closed when the future returned |
| /// by addStream completes without an error. |
| /// @author a.semenov@unipro.ru |
| |
| library pipe_A02_t01; |
| import "dart:async"; |
| import "../../../Utils/expect.dart"; |
| |
| class TestStreamConsumer<T> implements StreamConsumer<T> { |
| |
| int _addStreamFutureCompleted = 0; |
| int _addStreamFutureCompletedInClose = 0; |
| int _closeCallCount = 0; |
| StreamController _controller = new StreamController(); |
| |
| Future addStream(Stream<T> source) { |
| return _controller.addStream(source).then( |
| (x) { |
| _addStreamFutureCompleted++; |
| return x; |
| } |
| ); |
| } |
| |
| Future close() { |
| _closeCallCount++; |
| _addStreamFutureCompletedInClose = _addStreamFutureCompleted; |
| return _controller.close(); |
| } |
| |
| Stream get stream => _controller.stream; |
| int get addStreamFutureCompletedInClose => _addStreamFutureCompletedInClose; |
| int get closeCallCount => _closeCallCount; |
| } |
| |
| void test(CreateStreamFunction create) { |
| List values = []; |
| TestStreamConsumer<int> c = new TestStreamConsumer<int>(); |
| |
| c.stream.listen( |
| (x) { |
| values.add(x); |
| } |
| ); |
| |
| Stream<int> s = create([1, 2, 3, 4, 5]); |
| |
| asyncStart(); |
| s.pipe(c).then( |
| (x) { |
| Expect.listEquals([1, 2, 3, 4, 5], values); |
| Expect.equals(1, c.closeCallCount); |
| Expect.equals(1, c.addStreamFutureCompletedInClose); |
| asyncEnd(); |
| } |
| ); |
| } |