| // 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 Rectangle(3, 5, 10, 8); |
| var obj2 = new Rectangle(3, 5, 10, 8); |
| var obj3 = new Rectangle(1, 2, 10, 8); |
| Expect.isTrue(obj1.hashCode == obj1.hashCode); |
| Expect.isTrue(obj1.hashCode == obj2.hashCode); |
| Expect.isFalse(obj1.hashCode == obj3.hashCode); |
| Expect.isFalse(obj2.hashCode == obj3.hashCode); |
| } |