| // Copyright (c) 2016, 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 LinkedHashSet({bool equals(E e1, E e2), int hashCode(E e), |
| /// bool isValidKey(potentialKey)}) |
| /// If [equals] or [hashCode] are omitted, the set uses the elements' intrinsic |
| /// [Object.operator==] and [Object.hashCode]. |
| /// @description Checks that if [equals] and [hashCode] are omitted then |
| /// [Object.operator==] and [Object.hashCode] are used |
| /// @author sgrekhov@unipro.ru |
| |
| import "../../../Utils/expect.dart"; |
| import "dart:collection"; |
| |
| class C { |
| int get hashCode => 1; |
| bool operator ==(Object c) { |
| return true; |
| } |
| } |
| |
| main() { |
| LinkedHashSet set1 = new LinkedHashSet(equals: identical, |
| hashCode: identityHashCode); |
| LinkedHashSet set2 = new LinkedHashSet(); |
| |
| C key1 = new C(); |
| C key2 = new C(); |
| C key3 = new C(); |
| |
| set1.add(key1); |
| set1.add(key2); |
| set1.add(key3); |
| |
| set2.add(key1); |
| set2.add(key2); |
| set2.add(key3); |
| |
| Expect.equals(3, set1.length); |
| Expect.equals(1, set2.length); |
| } |