/*
 * Copyright (c) 2017, 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 TestConcurrentPhaseControlBasics
 * @bug 8169517
 * @summary Basic tests of WhiteBox concurrent GC phase control.
 * @key gc
 * @modules java.base
 * @library /test/lib
 * @build sun.hotspot.WhiteBox
 * @run main ClassFileInstaller sun.hotspot.WhiteBox
 * @run main/othervm
 *   -Xbootclasspath/a:.
 *   -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI
 *   TestConcurrentPhaseControlBasics
 */

import sun.hotspot.WhiteBox;

public class TestConcurrentPhaseControlBasics {

    private static final WhiteBox WB = WhiteBox.getWhiteBox();

    private static boolean request() throws Exception {
        WB.requestConcurrentGCPhase("UNKNOWN PHASE");
        return false;
    }

    private static boolean checkUnknownPhase() throws Exception {
        System.out.println("Expecting IllegalArgumentException");
        try {
            return request();
        } catch (IllegalArgumentException e) {
            return true;
        }
    }

    private static boolean checkUnsupported() throws Exception {
        System.out.println("Expecting IllegalStateException");
        try {
            return request();
        } catch (IllegalStateException e) {
            return true;
        }
    }

    private static boolean check() throws Exception {
        if (WB.supportsConcurrentGCPhaseControl()) {
            return checkUnknownPhase();
        } else {
            return checkUnsupported();
        }
    }

    public static void main(String[] args) throws Exception {
        if (check()) {
            System.out.println("Got expected exception");
        } else {
            throw new RuntimeException("No exception thrown");
        }
    }
}