| /* |
| * 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 int hashCode |
| * The hash code for this object. |
| * A hash code is a single integer which represents the state of the object that |
| * affects == comparisons. |
| * All objects have hash codes. The default hash code represents only the |
| * identity of the object, the same way as the default == implementation only |
| * considers objects equal if they are identical (see identityHashCode). |
| * @description Checks that equals objects have equal hash codes and |
| * different objects have different hash codes. |
| * @author ngl@unipro.ru |
| */ |
| |
| import "dart:math"; |
| import "../../../Utils/expect.dart"; |
| |
| main() { |
| var obj1 = new Point(3, 5); |
| var obj2 = new Point(3, 5); |
| var obj3 = new Point(1, 2); |
| var obj4 = obj1 + new Point(-2, -3); |
| Expect.isTrue(obj1.hashCode == obj1.hashCode); |
| Expect.isTrue(obj1.hashCode == obj2.hashCode); |
| Expect.isFalse(obj1.hashCode == obj3.hashCode); |
| Expect.isFalse(obj2.hashCode == obj3.hashCode); |
| Expect.isTrue(obj3.hashCode == obj4.hashCode); |
| } |