| /* |
| * 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 map(f(E element)) |
| * The transformed elements will not be cached. Iterating multiple times |
| * over the the returned [Iterable] will invoke the supplied |
| * function [f] multiple times on the same element. |
| * @description Checks that [f] will be invoked every time |
| * [Iterable] is iterated. |
| * @author msyabro |
| */ |
| import "../../../Utils/expect.dart"; |
| |
| main() { |
| var count = 0; |
| f(e) { |
| count++; |
| return e; |
| } |
| |
| var runes = new Runes('string'); |
| var res = runes.map(f); |
| |
| res.elementAt(0); |
| Expect.equals(1, count); |
| |
| res.elementAt(0); |
| Expect.equals(2, count); |
| |
| res.elementAt(3); |
| Expect.equals(3, count); |
| |
| res.elementAt(3); |
| Expect.equals(4, count); |
| |
| res.elementAt(1); |
| Expect.equals(5, count); |
| } |