| /* |
| * 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<T> map<T>(T f(E e)) |
| * ... |
| * As long as the returned [Iterable] is not iterated over, the supplied |
| * function f will not be invoked. |
| * @description Checks that [f] will not be invoked until the returned |
| * [Iterable] is not iterated over. |
| * @author msyabro |
| */ |
| |
| import "dart:typed_data"; |
| import "../../../Utils/expect.dart"; |
| |
| main() { |
| bool invoked = false; |
| int f(int e) { |
| invoked = true;; |
| return e; |
| } |
| |
| var l = new Int64List.fromList([1, 2, 3, 4, 5]); |
| var res = l.map(f); |
| |
| Expect.isFalse(invoked); |
| res.elementAt(0); |
| Expect.isTrue(invoked); |
| } |