| // 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 element)) |
| /// ... |
| /// The transformed elements will not be cached. Iterating multiple times over |
| /// 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 "dart:typed_data"; |
| import "../../../Utils/expect.dart"; |
| |
| main() { |
| var count = 0; |
| int f(int e) { |
| count++; |
| return e; |
| } |
| |
| var l = new Uint64List.fromList([1, 2, 3, 4, 5]); |
| var res = l.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); |
| } |