test/jdk/java/util/concurrent/atomic/AtomicReferenceTest.java

/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * 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
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 * 2 along with this work; if not, write to the Free Software Foundation,
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import java.util.concurrent.atomic.AtomicReference;
import org.testng.annotations.Test;
import static org.testng.Assert.*;

/*
 * @test
 * @summary Test Map default methods
 * @run testng AtomicReferenceTest
 * @author Jim Gish <jim.gish@oracle.com>
 */
public class AtomicReferenceTest {

    /**
     * Test of updateAndGet method, of class AtomicReference.
     */
    @Test
    public void testUpdateAndGet() {
        AtomicReference<Integer> instance = new AtomicReference<>(3);
        assertEquals((int) instance.get(), 3);
        assertEquals((int) instance.updateAndGet(x -> x + 2), 5);
        assertEquals((int) instance.get(), 5);
    }

    /**
     * Test of getAndUpdate method, of class AtomicReference.
     */
    @Test
    public void testGetAndUpdate() {
        AtomicReference<Integer> instance = new AtomicReference<>(3);
        assertEquals((int) instance.get(), 3);
        assertEquals((int) instance.getAndUpdate(x -> x + 3), 3);
        assertEquals((int) instance.get(), 6);
    }
}