test/jdk/jdk/jfr/api/flightrecorder/TestGetRecordings.java

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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
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package jdk.jfr.api.flightrecorder;

import static jdk.test.lib.Asserts.assertEquals;
import static jdk.test.lib.Asserts.assertFalse;
import static jdk.test.lib.Asserts.assertTrue;

import java.util.List;

import jdk.jfr.FlightRecorder;
import jdk.jfr.Recording;

/**
 * @test
 * @key jfr
 * @requires vm.hasJFR
 * @library /test/lib
 * @run main/othervm jdk.jfr.api.flightrecorder.TestGetRecordings
 */
public class TestGetRecordings {

    public static void main(String[] args) throws Throwable {
        FlightRecorder recorder = FlightRecorder.getFlightRecorder();

        // Recording should be empty at start.
        List<Recording> recordings = recorder.getRecordings();
        assertTrue(recordings.isEmpty(), "recordings should be empty at start");

        // Create first recording
        Recording r1 = new Recording();
        recordings = recorder.getRecordings();
        assertEquals(recordings.size(), 1, "Expected 1 recording");
        assertTrue(recordings.contains(r1), "r1 should be in list");

        // Create second recording
        Recording r2 = new Recording();
        recordings = recorder.getRecordings();
        assertEquals(recordings.size(), 2, "Expected 2 recordings");
        assertTrue(recordings.contains(r2), "r2 should be in list");
        assertTrue(recordings.contains(r1), "r1 should still be in list");

        // Close first recording
        r1.close();
        recordings = recorder.getRecordings();
        assertEquals(recordings.size(), 1, "Expected 1 remaining recording");
        assertTrue(recordings.contains(r2), "r2 should still be in list");
        assertFalse(recordings.contains(r1), "r1 should be removed");

        // Close second recording
        r2.close();
        recordings = recorder.getRecordings();
        assertTrue(recordings.isEmpty(), "recordings should be empty after close");

        // Create recording with new Recording()
        Recording r3 = new Recording();
        recordings = recorder.getRecordings();
        assertTrue(recordings.contains(r3 ), "new Recording() should be in list");
        r3.close();
    }

}