/*

 * Copyright (c) 2017, 2018, Red Hat, Inc. 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.

 */

import java.lang.management.GarbageCollectorMXBean;

import java.lang.management.ManagementFactory;

/*

 * @test TestEnabled

 * @key gc

 * @requires vm.gc.Shenandoah & vm.gc == "null"

 * @run main/othervm -Dexpected=false -Xmx64m                                                       TestEnabled

 * @run main/othervm -Dexpected=true  -Xmx64m -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC TestEnabled

 */

/*

 * @test TestEnabledAlready

 * @key gc

 * @requires vm.gc.Shenandoah & vm.gc == "Shenandoah"

 * @run main/othervm -Dexpected=true -Xmx64m                                                        TestEnabled

 */

public class TestEnabled {

    public static void main(String... args) {

        boolean expected = Boolean.getBoolean("expected");

        boolean actual = isEnabled();

        if (expected != actual) {

            throw new IllegalStateException("Error: expected = " + expected + ", actual = " + actual);

        }

    }

    public static boolean isEnabled() {

        for (GarbageCollectorMXBean bean : ManagementFactory.getGarbageCollectorMXBeans()) {

            if (bean.getName().contains("Shenandoah")) {

                return true;

            }

        }

        return false;

    }

}