| // 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 E firstWhere(bool test(E element), {E orElse()}) |
| /// ... |
| /// If no element satisfies test, the result of invoking the orElse function is |
| /// returned. |
| /// @description Checks that if no element satisfies test, the result of invoking |
| /// the orElse function is returned. |
| /// @author ngl@unipro.ru |
| |
| |
| import "dart:typed_data"; |
| import "../../../Utils/expect.dart"; |
| |
| Float64x2 f64x2(v) => new Float64x2.splat(v); |
| |
| main() { |
| var count = 0; |
| Float64x2 f() { |
| count++; |
| return f64x2(20.0); |
| } |
| var l = new Float64x2List.fromList([ |
| f64x2(5.0), f64x2(6.0), f64x2(7.0), f64x2(8.0), f64x2(9.0), f64x2(10.0), |
| f64x2(11.0), f64x2(12.0), f64x2(13.0), f64x2(14.0), f64x2(15.0), |
| f64x2(16.0), f64x2(17.0) |
| ]); |
| var res = l.firstWhere((element) => element.x > 20, orElse: f); |
| Expect.equals(1, count); |
| Expect.equals(20.0, res.x); |
| Expect.equals(20.0, res.y); |
| |
| |
| res = l.firstWhere((element) => false, orElse: f); |
| Expect.equals(2, count); |
| Expect.equals(20.0, res.x); |
| Expect.equals(20.0, res.y); |
| |
| l = new Float64x2List.fromList([]); |
| res = l.firstWhere((element) => true, orElse: f); |
| Expect.equals(3, count); |
| Expect.equals(20.0, res.x); |
| Expect.equals(20.0, res.y); |
| } |