| // 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 dynamic firstWhere(bool test(E element), {Object orElse()}) |
| /// If no element satisfies test, the result of invoking the orElse function is |
| /// returned. |
| /// @description Checks that the [orElse] function is invoked and its result is |
| /// returned if no element matches [test]. |
| /// @author msyabro |
| |
| import "dart:typed_data"; |
| import "../../../Utils/expect.dart"; |
| |
| main() { |
| var count = 0; |
| f() { |
| count++; |
| return 1.0; |
| } |
| var l = new Float32List.fromList([1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 9.0]); |
| var res = l.firstWhere((element) => false, orElse: f); |
| Expect.equals(1, count); |
| Expect.equals(1.0, res); |
| |
| res = l.firstWhere((element) => element > 100.0, orElse: f); |
| Expect.equals(2, count); |
| Expect.equals(1.0, res); |
| |
| l = new Float32List.fromList([]); |
| res = l.firstWhere((element) => true, orElse: f); |
| Expect.equals(3, count); |
| Expect.equals(1.0, res); |
| } |