| // 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> where(bool test(E element)) |
| /// As long as the returned [Iterable] is not iterated over, |
| /// the supplied function [test] will not be invoked. |
| /// @description Checks that as long as the returned [Iterable] is not iterated |
| /// over, the supplied function [test] will not be invoked. |
| /// @author msyabro |
| |
| import "../../../Utils/expect.dart"; |
| |
| main() { |
| var count = 0; |
| test(e) { |
| ++count; |
| return true; |
| } |
| |
| var runes = new Runes('abc'); |
| var res = runes.where(test); |
| |
| Expect.equals(0,count); |
| res.elementAt(0); |
| Expect.equals(1,count); |
| } |