/*

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 * 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.

 *

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 */

/*

 * @test

 * @bug     4858522

 * @summary Basic unit test of HotspotClassLoadingMBean.getInitializedClassCount()

 * @author  Steve Bohne

 *

 * @run main/othervm -XX:+UsePerfData GetInitializedClassCount

 */

/*

 * This test is just a sanity check and does not check for the correct value.

 */

import sun.management.*;

public class GetInitializedClassCount {

    private static HotspotClassLoadingMBean mbean =

        (HotspotClassLoadingMBean)ManagementFactoryHelper.getHotspotClassLoadingMBean();

    // Careful with these values.

    private static final long MIN_VALUE_FOR_PASS = 1;

    private static final long MAX_VALUE_FOR_PASS = Long.MAX_VALUE;

    private static boolean trace = false;

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

        if (args.length > 0 && args[0].equals("trace")) {

            trace = true;

        }

        long value = mbean.getInitializedClassCount();

        if (trace) {

            System.out.println("Initialized class count: " + value);

        }

        if (value < MIN_VALUE_FOR_PASS || value > MAX_VALUE_FOR_PASS) {

            throw new RuntimeException("Initialized class count " +

                                       "illegal value: " + value + " " +

                                       "(MIN = " + MIN_VALUE_FOR_PASS + "; " +

                                       "MAX = " + MAX_VALUE_FOR_PASS + ")");

        }

        // Initialize a class

        Class.forName("ClassToInitialize0");

        long value2 = mbean.getInitializedClassCount();

        if (trace) {

            System.out.println("Initialized class count2: " + value2);

        }

        // If new count does not reflect that at least one class has

        // been initialized, throw an exception.  We don't check that

        // _exactly_ one class has been initialized because another

        // thread may (rarely) have also done some class initialization.

        if (value2 < value + 1) {

            throw new RuntimeException("Initialized class count " +

                                       "did not increase " +

                                       "(value = " + value + "; " +

                                       "value2 = " + value2 + ")");

        }

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

    }

}

class ClassToInitialize0 {

    static int i = 0;

    static {

        i = 1;

    }

}