/*

 * Copyright (c) 2011, 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.

 */

/*

 * Portions Copyright (c) 2011 IBM Corporation

 */

/*

 * @test

 * @bug 6312706

 * @summary Sets from Map.entrySet() return distinct objects for each Entry

 * @author Neil Richards <neil.richards@ngmr.net>, <neil_richards@uk.ibm.com>

 */

import java.util.IdentityHashMap;

import java.util.HashSet;

import java.util.Map;

import java.util.Set;

public class DistinctEntrySetElements {

    public static void main(String[] args) throws Exception {

        final IdentityHashMap<String, String> identityHashMap =

            new IdentityHashMap<>();

        identityHashMap.put("One", "Un");

        identityHashMap.put("Two", "Deux");

        identityHashMap.put("Three", "Trois");

        Set<Map.Entry<String, String>> entrySet = identityHashMap.entrySet();

        HashSet<Map.Entry<String, String>> hashSet = new HashSet<>(entrySet);

        // NB: These comparisons are valid in this case because none of the

        //     keys put into 'identityHashMap' above are equal to any other.

        if (false == hashSet.equals(entrySet)) {

            throw new RuntimeException("Test FAILED: Sets are not equal.");

        }

        if (hashSet.hashCode() != entrySet.hashCode()) {

            throw new RuntimeException("Test FAILED: Set's hashcodes are not equal.");

        }

    }

}