/*

 * Copyright (c) 2007, 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 4708197 6497629

 * @summary Test for max priority setting that matches spec

 * @author Pete Soper

 */

public class SetMaxPriority {

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

        ThreadGroup tg = new ThreadGroup("foo");

        ThreadGroup ptg = tg.getParent();

        int currentMaxPriority = tg.getMaxPriority();

        int halfMaxPriority = ptg.getMaxPriority() / 2;

        if (halfMaxPriority - Thread.MIN_PRIORITY < 2) {

            throw new RuntimeException("SetMaxPriority test no longer valid: starting parent max priority too close to Thread.MIN_PRIORITY");

        }

        tg.setMaxPriority(halfMaxPriority - 2);

        currentMaxPriority = tg.getMaxPriority();

        if (currentMaxPriority != halfMaxPriority - 2) {

            throw new RuntimeException("SetMaxPriority failed: max priority not changed");

        }

        // This will fail if bug 6497629 is present because the min tests is

        // being made with the (just lowered) max instead of the parent max,

        // preventing the priority from being moved back up.

        tg.setMaxPriority(currentMaxPriority + 1);

        int newMaxPriority = tg.getMaxPriority();

        if (newMaxPriority != currentMaxPriority + 1) {

            throw new RuntimeException("SetMaxPriority failed: defect 6497629 present");

        }

        // Confirm that max priorities out of range on both ends have no

        // effect.

        for (int badPriority : new int[] {Thread.MIN_PRIORITY - 1,

                                          Thread.MAX_PRIORITY + 1}) {

            int oldPriority = tg.getMaxPriority();

            tg.setMaxPriority(badPriority);

            if (oldPriority != tg.getMaxPriority())

                throw new RuntimeException(

                    "setMaxPriority bad arg not ignored as specified");

        }

        System.out.println("SetMaxPriority passed");

    }

}