| // 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) |
| /// If the adding of the stream itself fails in some way, then the consumer |
| /// is expected to be closed, and won't be closed again. In that case |
| /// the returned future completes with the error from calling addStream. |
| /// @description Checks that returned future is completed with error from |
| /// calling addStream. Also check that StreamConsumer.close is not called. |
| /// @author a.semenov@unipro.ru |
| |
| library pipe_A04_t02; |
| import "dart:async"; |
| import "../../../Utils/expect.dart"; |
| |
| class TestStreamConsumer<T> implements StreamConsumer<T> { |
| int _closeCallCount = 0; |
| StreamController _controller = new StreamController(); |
| |
| Future addStream(Stream<T> source) { |
| return _controller.addStream(source).then( |
| (_) { |
| _controller.close(); |
| return new Future.error("addStreamError"); |
| } |
| ); |
| } |
| |
| Future close() { |
| _closeCallCount++; |
| return new Future.error("closeError"); |
| } |
| |
| Stream get stream => _controller.stream; |
| int get closeCallCount => _closeCallCount; |
| } |
| |
| void test(CreateStreamFunction create) { |
| List values = []; |
| TestStreamConsumer<int> c = new TestStreamConsumer<int>(); |
| |
| Stream<int> s = create([1, 2, 3, 4, 5]); |
| |
| c.stream.listen( |
| (x) { |
| values.add(x); |
| }, |
| onDone:(){ |
| Expect.listEquals([1, 2, 3, 4, 5], values); |
| asyncEnd(); |
| } |
| ); |
| |
| asyncMultiStart(2); |
| s.pipe(c).then( |
| (_) { |
| Expect.fail("Returned future should complete with error"); |
| }, |
| onError:(e) { |
| Expect.equals("addStreamError", e); |
| Expect.equals(0, c.closeCallCount); |
| asyncEnd(); |
| } |
| ); |
| } |