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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
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 * 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
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package jdk.jfr.event.gc.collection;

import static jdk.testlibrary.Asserts.assertTrue;

import java.time.Duration;

import jdk.jfr.Recording;
import jdk.jfr.consumer.RecordedEvent;
import jdk.testlibrary.jfr.Events;
import jdk.testlibrary.jfr.GCHelper;

/*
 * @test
 * @key jfr
 * @library /lib/testlibrary
 * @run main/othervm -verbose:gc -XX:+UnlockExperimentalVMOptions -XX:-UseFastUnorderedTimeStamps jdk.jfr.event.gc.collection.TestGCGarbageCollectionEvent
 */
public class TestGCGarbageCollectionEvent {

    private final static String EVENT_NAME = GCHelper.event_garbage_collection;

    public static void main(String[] args) throws Exception {
        Recording recording = new Recording();
        recording.enable(EVENT_NAME).withThreshold(Duration.ofMillis(0));
        recording.start();
        System.gc();
        recording.stop();

        boolean isAnyFound = false;
        for (RecordedEvent event : Events.fromRecording(recording)) {
            if (!EVENT_NAME.equals(event.getEventType().getName())) {
                continue;
            }
            System.out.println("Event: " + event);
            isAnyFound = true;

            long longestPause = Events.assertField(event, "longestPause").atLeast(0L).getValue();
            Events.assertField(event, "sumOfPauses").atLeast(longestPause);
        }
        assertTrue(isAnyFound, "No matching event found");
    }
}