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Revision 1.2 - (download) (annotate)
Tue Oct 11 20:38:07 2016 UTC (11 months, 1 week ago) by jsr166
Branch: MAIN
CVS Tags: HEAD
Changes since 1.1: +13 -0 lines
sync with openjdk9
/*
 * Written by Doug Lea with assistance from members of JCP JSR-166
 * Expert Group and released to the public domain, as explained at
 * http://creativecommons.org/publicdomain/zero/1.0/
 */

import java.util.concurrent.atomic.AtomicReference;

import junit.framework.Test;
import junit.framework.TestSuite;

public class AtomicReference9Test extends JSR166TestCase {
    public static void main(String[] args) {
        main(suite(), args);
    }
    public static Test suite() {
        return new TestSuite(AtomicReference9Test.class);
    }

    /**
     * getPlain returns the last value set
     */
    public void testGetPlainSet() {
        AtomicReference<Integer> ai = new AtomicReference<>(one);
        assertEquals(one, ai.getPlain());
        ai.set(two);
        assertEquals(two, ai.getPlain());
        ai.set(m3);
        assertEquals(m3, ai.getPlain());
    }

    /**
     * getOpaque returns the last value set
     */
    public void testGetOpaqueSet() {
        AtomicReference<Integer> ai = new AtomicReference<>(one);
        assertEquals(one, ai.getOpaque());
        ai.set(two);
        assertEquals(two, ai.getOpaque());
        ai.set(m3);
        assertEquals(m3, ai.getOpaque());
    }

    /**
     * getAcquire returns the last value set
     */
    public void testGetAcquireSet() {
        AtomicReference<Integer> ai = new AtomicReference<>(one);
        assertEquals(one, ai.getAcquire());
        ai.set(two);
        assertEquals(two, ai.getAcquire());
        ai.set(m3);
        assertEquals(m3, ai.getAcquire());
    }

    /**
     * get returns the last value setPlain
     */
    public void testGetSetPlain() {
        AtomicReference<Integer> ai = new AtomicReference<>(one);
        assertEquals(one, ai.get());
        ai.setPlain(two);
        assertEquals(two, ai.get());
        ai.setPlain(m3);
        assertEquals(m3, ai.get());
    }

    /**
     * get returns the last value setOpaque
     */
    public void testGetSetOpaque() {
        AtomicReference<Integer> ai = new AtomicReference<>(one);
        assertEquals(one, ai.get());
        ai.setOpaque(two);
        assertEquals(two, ai.get());
        ai.setOpaque(m3);
        assertEquals(m3, ai.get());
    }

    /**
     * get returns the last value setRelease
     */
    public void testGetSetRelease() {
        AtomicReference<Integer> ai = new AtomicReference<>(one);
        assertEquals(one, ai.get());
        ai.setRelease(two);
        assertEquals(two, ai.get());
        ai.setRelease(m3);
        assertEquals(m3, ai.get());
    }

    /**
     * compareAndExchange succeeds in changing value if equal to
     * expected else fails
     */
    public void testCompareAndExchange() {
        AtomicReference<Integer> ai = new AtomicReference<>(one);
        assertEquals(one, ai.compareAndExchange(one, two));
        assertEquals(two, ai.compareAndExchange(two, m4));
        assertEquals(m4, ai.get());
        assertEquals(m4, ai.compareAndExchange(m5, seven));
        assertEquals(m4, ai.get());
        assertEquals(m4, ai.compareAndExchange(m4, seven));
        assertEquals(seven, ai.get());
    }

    /**
     * compareAndExchangeAcquire succeeds in changing value if equal to
     * expected else fails
     */
    public void testCompareAndExchangeAcquire() {
        AtomicReference<Integer> ai = new AtomicReference<>(one);
        assertEquals(one, ai.compareAndExchangeAcquire(one, two));
        assertEquals(two, ai.compareAndExchangeAcquire(two, m4));
        assertEquals(m4, ai.get());
        assertEquals(m4, ai.compareAndExchangeAcquire(m5, seven));
        assertEquals(m4, ai.get());
        assertEquals(m4, ai.compareAndExchangeAcquire(m4, seven));
        assertEquals(seven, ai.get());
    }

    /**
     * compareAndExchangeRelease succeeds in changing value if equal to
     * expected else fails
     */
    public void testCompareAndExchangeRelease() {
        AtomicReference<Integer> ai = new AtomicReference<>(one);
        assertEquals(one, ai.compareAndExchangeRelease(one, two));
        assertEquals(two, ai.compareAndExchangeRelease(two, m4));
        assertEquals(m4, ai.get());
        assertEquals(m4, ai.compareAndExchangeRelease(m5, seven));
        assertEquals(m4, ai.get());
        assertEquals(m4, ai.compareAndExchangeRelease(m4, seven));
        assertEquals(seven, ai.get());
    }

    /**
     * repeated weakCompareAndSetPlain succeeds in changing value when equal
     * to expected
     */
    public void testWeakCompareAndSetPlain() {
        AtomicReference<Integer> ai = new AtomicReference<>(one);
        do {} while (!ai.weakCompareAndSetPlain(one, two));
        do {} while (!ai.weakCompareAndSetPlain(two, m4));
        assertEquals(m4, ai.get());
        do {} while (!ai.weakCompareAndSetPlain(m4, seven));
        assertEquals(seven, ai.get());
    }

    /**
     * repeated weakCompareAndSetVolatile succeeds in changing value when equal
     * to expected
     */
    public void testWeakCompareAndSetVolatile() {
        AtomicReference<Integer> ai = new AtomicReference<>(one);
        do {} while (!ai.weakCompareAndSetVolatile(one, two));
        do {} while (!ai.weakCompareAndSetVolatile(two, m4));
        assertEquals(m4, ai.get());
        do {} while (!ai.weakCompareAndSetVolatile(m4, seven));
        assertEquals(seven, ai.get());
    }

    /**
     * repeated weakCompareAndSetAcquire succeeds in changing value when equal
     * to expected
     */
    public void testWeakCompareAndSetAcquire() {
        AtomicReference<Integer> ai = new AtomicReference<>(one);
        do {} while (!ai.weakCompareAndSetAcquire(one, two));
        do {} while (!ai.weakCompareAndSetAcquire(two, m4));
        assertEquals(m4, ai.get());
        do {} while (!ai.weakCompareAndSetAcquire(m4, seven));
        assertEquals(seven, ai.get());
    }

    /**
     * repeated weakCompareAndSetRelease succeeds in changing value when equal
     * to expected
     */
    public void testWeakCompareAndSetRelease() {
        AtomicReference<Integer> ai = new AtomicReference<>(one);
        do {} while (!ai.weakCompareAndSetRelease(one, two));
        do {} while (!ai.weakCompareAndSetRelease(two, m4));
        assertEquals(m4, ai.get());
        do {} while (!ai.weakCompareAndSetRelease(m4, seven));
        assertEquals(seven, ai.get());
    }

}

Doug Lea
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