| /* |
| * 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<T> skipWhile(bool test(T element)) |
| * Skip data events from this stream while they are matched by test. |
| * Error and done events are provided by the returned stream unmodified. |
| * Starting with the first data event where test returns true for the event data, |
| * the returned stream will have the same events as this stream. |
| * @description Checks that elements matched by a test are skipped. |
| * @author kaigorodov |
| */ |
| |
| import "dart:async"; |
| import "../../../Utils/async_utils.dart"; |
| import "../../../Utils/expect.dart"; |
| |
| /** index - first position in the stream where test() returns false |
| */ |
| void check(List data, bool test(var element), int index) { |
| Stream s=new Stream.fromIterable(data); |
| Stream t=s.skipWhile(test); |
| bool seen=false; |
| asyncStart(); |
| t.listen((value){ |
| if (!seen) { |
| Expect.isFalse(test(value), "test($value)=true"); |
| seen=true; |
| } else { |
| index++; |
| } |
| Expect.equals(data[index], value); |
| }, |
| onDone: (){ |
| Expect.equals(seen, index<data.length); |
| asyncEnd(); |
| } |
| ); |
| } |
| |
| main() { |
| check([],null,0); |
| check([1,2,3], (element)=>false, 0); |
| check([-1,-2,-3,1,2,3], (element)=>element<0, 3); |
| check([1,2,3], (element)=>element==1, 1); |
| check([1,2,3], (element)=>true, 3); |
| } |
| |