/*

 * Copyright (c) 2012, 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) 2012, IBM Corporation

 */

/*

 * @test

 * @bug 7123229

 * @summary (coll) EnumMap.containsValue(null) returns true

 * @author ngmr

 */

import java.util.EnumMap;

import java.util.Map;

public class UniqueNullValue {

    static enum TestEnum { e00, e01 }

    public static void main(String[] args) {

        Map<TestEnum, Integer> map = new EnumMap<>(TestEnum.class);

        map.put(TestEnum.e00, 0);

        if (false == map.containsValue(0)) {

            throw new RuntimeException("EnumMap unexpectedly missing 0 value");

        }

        if (map.containsValue(null)) {

            throw new RuntimeException("EnumMap unexpectedly holds null value");

        }

        map.put(TestEnum.e00, null);

        if (map.containsValue(0)) {

            throw new RuntimeException("EnumMap unexpectedly holds 0 value");

        }

        if (false == map.containsValue(null)) {

            throw new RuntimeException("EnumMap unexpectedly missing null value");

        }

    }

}