| /* |
| * 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 transform(StreamTransformer<T, dynamic> streamTransformer) |
| * Chains this stream as the input of the provided StreamTransformer. |
| * Returns the result of streamTransformer.bind itself. |
| * @description Checks that data events are produced according to transform. |
| * @author ilya |
| */ |
| |
| import "dart:async"; |
| import "../../../Utils/async_utils.dart"; |
| import "../../../Utils/expect.dart"; |
| import "IsolateStream.dart" as IsolateStream; |
| |
| var input=[1,2,3,4,5]; |
| var expected=[1,2,3,6,5,10]; |
| |
| // transform: skip evens, produce number and its double |
| StreamTransformer<int, int> createMyTransformer() { |
| return new StreamTransformer.fromHandlers ( |
| handleData: (int event, EventSink<int> sink) { |
| if (event.isOdd) { |
| sink.add(event); |
| sink.add(event*2); |
| } |
| } |
| ); |
| } |
| |
| main() { |
| var s = IsolateStream.fromIterable(input).transform(createMyTransformer()); |
| var actual = []; |
| |
| asyncStart(); |
| |
| s.listen((x) { |
| actual.add(x); |
| }, onDone:() { |
| Expect.listEquals(expected, actual); |
| asyncEnd(); |
| }); |
| } |