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/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* 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).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/*
* This file is available under and governed by the GNU General Public
* License version 2 only, as published by the Free Software Foundation.
* However, the following notice accompanied the original version of this
* file:
*
* 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());
}
}
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