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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * particular file as subject to the "Classpath" exception as provided
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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).
 *
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 * 2 along with this work; if not, write to the Free Software Foundation,
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package jdk.jfr.event.gc.collection;

import java.time.Duration;
import java.util.List;

import jdk.jfr.Recording;
import jdk.jfr.consumer.RecordedEvent;
import jdk.test.lib.jfr.Events;
import jdk.test.lib.jfr.GCHelper;

/*
 * @test
 * @key jfr
  * @requires vm.gc == "Parallel" | vm.gc == null
 * @library /test/lib /test/jdk
 * @run main/othervm -XX:+UseParallelGC -XX:+UseParallelOldGC jdk.jfr.event.gc.collection.TestGCWithFasttime
 */
public class TestGCWithFasttime {
    private static final String EVENT_NAME = GCHelper.event_garbage_collection;

    // TODO: Check if all GC tests can be run with fast time. If so, this test is probably not needed.
    public static void main(String[] args) throws Exception {
        Recording recording = new Recording();
        recording.enable(EVENT_NAME).withThreshold(Duration.ofMillis(0));
        recording.start();
        System.gc();
        System.gc();
        recording.stop();

        List<RecordedEvent> events = Events.fromRecording(recording);
        Events.hasEvents(events);
        for (RecordedEvent event : events) {
            if (!EVENT_NAME.equals(event.getEventType().getName())) {
                continue;
            }
            Events.assertField(event, "name").notEmpty();
            Events.assertField(event, "cause").notEmpty();
        }
    }
}