| // Copyright (c) 2017, 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 as long as the returned Iterable is not iterated |
| /// over, the supplied function f will not be invoked. |
| /// @author ngl@unipro.ru |
| |
| |
| import "dart:typed_data"; |
| import "../../../Utils/expect.dart"; |
| |
| Int32x4 i32x4(n) => new Int32x4(n, n, n, n); |
| |
| main() { |
| var counter = false; |
| f(e) { |
| counter = true; |
| return e.z; |
| } |
| var list = [i32x4(0), i32x4(1), i32x4(2), i32x4(1), i32x4(3), i32x4(4)]; |
| var l = new Int32x4List.fromList(list); |
| var res = l.map(f); |
| |
| Expect.isFalse(counter); |
| res.elementAt(0); |
| Expect.isTrue(counter); |
| } |