test/jdk/jdk/jfr/api/recording/time/TestTimeDuration.java

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package jdk.jfr.api.recording.time;

import java.time.Duration;
import java.time.Instant;

import jdk.jfr.Recording;
import jdk.test.lib.Asserts;

/**
 * @test
 * @key jfr
 * @summary Test Recording.setDuration() and Recording.get*Time()
 * @requires vm.hasJFR
 * @library /test/lib
 * @run main/othervm jdk.jfr.api.recording.time.TestTimeDuration
 */

public class TestTimeDuration {

    public static void main(String[] args) throws Throwable {
        Recording r = new Recording();
        final Duration duration = Duration.ofMillis(30000);

        r.setDuration(duration);
        Asserts.assertNull(r.getStartTime(), "getStartTime() not null before start");
        Asserts.assertNull(r.getStopTime(), "getStopTime() not null before start");

        final Instant beforeStart = Instant.now();
        r.start();
        final Instant afterStart = Instant.now();

        Asserts.assertNotNull(r.getStartTime(), "getStartTime() null after start()");
        Asserts.assertGreaterThanOrEqual(r.getStartTime(), beforeStart, "getStartTime() < beforeStart");
        Asserts.assertLessThanOrEqual(r.getStartTime(), afterStart, "getStartTime() > afterStart");

        Asserts.assertNotNull(r.getStopTime(), "getStopTime() null after start with duration");
        Asserts.assertGreaterThanOrEqual(r.getStopTime(), beforeStart.plus(duration), "getStopTime() < beforeStart + duration");
        Asserts.assertLessThanOrEqual(r.getStopTime(), afterStart.plus(duration), "getStopTime() > afterStart + duration");

        r.close();
    }

}