| /* |
| * Copyright (c) 2007, 2013, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /* |
| * @test |
| * @bug 6585904 |
| * @run testng CheckedIdentityMap |
| * @summary Checked collections with underlying maps with identity comparisons |
| */ |
| |
| import java.util.*; |
| import static java.util.Collections.*; |
| |
| import static org.testng.Assert.assertEquals; |
| import static org.testng.Assert.assertNotEquals; |
| |
| import org.testng.annotations.Test; |
| |
| public class CheckedIdentityMap { |
| |
| @Test |
| public void testHashCode() { |
| Map<Integer, Integer> m1 = checkedMap( |
| new IdentityHashMap<Integer, Integer>(), |
| Integer.class, Integer.class); |
| Map<Integer, Integer> m2 = checkedMap( |
| new IdentityHashMap<Integer, Integer>(), |
| Integer.class, Integer.class); |
| // NB: these are unique instances. Compare vs. Integer.valueOf(1) |
| m1.put(new Integer(1), new Integer(1)); |
| m2.put(new Integer(1), new Integer(1)); |
| |
| Map.Entry<Integer, Integer> e1 = m1.entrySet().iterator().next(); |
| Map.Entry<Integer, Integer> e2 = m2.entrySet().iterator().next(); |
| |
| assertNotEquals(e1, e2); |
| assertEquals(e1.hashCode(), hashCode(e1)); |
| assertEquals(e2.hashCode(), hashCode(e2)); |
| } |
| |
| static int hashCode(Map.Entry<?,?> e) { |
| return (System.identityHashCode(e.getKey()) ^ |
| System.identityHashCode(e.getValue())); |
| } |
| } |