| // Copyright (c) 2014, 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. |
| |
| // @dart = 2.9 |
| |
| /// @assertion Point<T> operator +(Point<T> other) |
| /// @description Checks that if at least one of coordinates is null, |
| /// an Exception is thrown. |
| /// @note undocumented |
| /// @author kaigorodov |
| |
| |
| import "dart:math"; |
| import "../../../Utils/expect.dart"; |
| |
| void check(num x1, num y1, num x2, num y2) { |
| Expect.throws(() { |
| new Point(x1, y1) - new Point(x2, y2); |
| }); |
| } |
| |
| main() { |
| check(0, 1, -1, null); |
| check(0, 1, null, -1); |
| check(0, null, 1, -1); |
| check(null, 0, 1, null); |
| check(null, 0, null, -1); |
| check(null, null, 1, -1); |
| check(0, 1, null, null); |
| check(0, null, 1, null); |
| check(0, null, null, 1); |
| check(0, null, null, null); |
| check(null, 0, null, null); |
| check(null, null, 0, null); |
| check(null, null, null, 0); |
| check(null, null, null, null); |
| } |