| /* |
| * 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 factory StreamTransformer.fromHandlers({void handleData(S data, |
| * EventSink<T> sink), void handleError(Object error, StackTrace stackTrace, |
| * EventSink<T> sink), void handleDone(EventSink<T> sink)}) |
| * Creates a StreamTransformer that delegates events to the given functions. |
| * |
| * @description Checks the case when all handlers are provided, errors |
| * converted to data, and handleDone() adds extra data elements. |
| * @author ilya |
| */ |
| import "dart:async"; |
| import "../../../Utils/expect.dart"; |
| |
| main() { |
| Stream<int> s = new Stream.fromIterable([1, 2, 3, 4, 5]); |
| |
| // odd numbers as data events, even numbers as error events |
| s = s.map((x) => x.isOdd ? x : throw x); |
| |
| StreamTransformer<int, dynamic> tr = new StreamTransformer.fromHandlers( |
| handleData: (x, sink) { sink.add(x); }, |
| handleError: (x, st, sink) { sink.add(x); }, |
| handleDone: (sink) { sink.add(6); sink.add(7); sink.close(); } |
| ); |
| |
| asyncStart(); |
| s.transform(tr).toList().then( |
| (x) { |
| Expect.listEquals([1, 2, 3, 4, 5, 6, 7], x); |
| asyncEnd(); |
| } |
| ); |
| } |