/*

 * Copyright (c) 2019, Red Hat, Inc. All rights reserved.

 *

 * 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.

 *

 */

package jdk.jfr.event.gc.detailed;

import java.nio.file.Paths;

import java.time.Duration;

import java.util.List;

import jdk.jfr.Recording;

import jdk.jfr.consumer.RecordedEvent;

import jdk.test.lib.Asserts;

import jdk.test.lib.jfr.EventNames;

import jdk.test.lib.jfr.Events;

import jdk.test.lib.jfr.GCHelper;

/**

 * @test

 * @bug 8221507

 * @key jfr

 * @library /test/lib /test/jdk

 * @run main/othervm  -Xmx32m -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -XX:ShenandoahGarbageThreshold=1 jdk.jfr.event.gc.detailed.TestShenandoahHeapRegionStateChangeEvent

 */

public class TestShenandoahHeapRegionStateChangeEvent {

    private final static String EVENT_NAME = EventNames.ShenandoahHeapRegionStateChange;

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

        try (Recording recording = new Recording()) {

            // activate the event we are interested in and start recording

            recording.enable(EVENT_NAME).withThreshold(Duration.ofMillis(0));

            recording.start();

            byte[][] array = new byte[1024][];

            for (int i = 0; i < array.length; i++) {

                array[i] = new byte[20 * 1024];

            }

            recording.stop();

            // Verify recording

            List<RecordedEvent> events = Events.fromRecording(recording);

            Asserts.assertFalse(events.isEmpty(), "No events found");

            for (RecordedEvent event : events) {

                Events.assertField(event, "index").notEqual(-1);

                GCHelper.assertIsValidShenandoahHeapRegionState(Events.assertField(event, "from").getValue());

                GCHelper.assertIsValidShenandoahHeapRegionState(Events.assertField(event, "to").getValue());

                Events.assertField(event, "used").atMost(1L*1024*1024);

            }

        }

    }

}