| /* |
| * Copyright (c) 2013, 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 Iterable<E> takeWhile(bool test(E element)) |
| * Returns an [Iterable] that stops once [test] is not satisfied anymore. |
| * @description Checks that all first elements that satisfy test are |
| * retained, and elements after that are skipped. |
| * @author msyabro |
| */ |
| |
| import "dart:typed_data"; |
| import "../../../Utils/expect.dart"; |
| |
| void check(list, bool test(var element)) { |
| var l = new Float64List.fromList(list); |
| var it0=l.iterator; |
| var res=l.takeWhile(test); |
| var it=res.iterator; |
| var skipCount=0; |
| |
| // check that the beginning of a0 is identical to a |
| var hasNext0=it0.moveNext(); |
| var len=0; |
| for (;;) { |
| bool hasNext=it.moveNext(); |
| if (!hasNext) break; |
| Expect.isTrue(test(it0.current)); |
| Expect.equals(it0.current, it.current); |
| len++; |
| hasNext0=it0.moveNext(); |
| } |
| Expect.equals(len, res.length); |
| |
| // count the rest |
| while (hasNext0) { |
| skipCount++; |
| hasNext0=it0.moveNext(); |
| } |
| |
| Expect.equals(l.length, len+skipCount); |
| } |
| |
| main() { |
| var a0=[1.0,3.0,7.0,4.0,5.0,6.0]; |
| check(a0, (var element)=>element==1.0); |
| check(a0, (var element)=>true); |
| check(a0, (var element)=>false); |
| check(a0, (var element)=>element>4.0); |
| check(a0, (var element)=>element<4.0); |
| check(a0, (var element)=>element==4.0); |
| } |