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dl |
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/* |
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* Written by members of JCP JSR-166 Expert Group and released to the |
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* public domain. Use, modify, and redistribute this code in any way |
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* without acknowledgement. Other contributors include Andrew Wright, |
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* Jeffrey Hayes, Pat Fischer, Mike Judd. |
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*/ |
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import java.util.concurrent.atomic.*; |
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import junit.framework.*; |
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import java.util.*; |
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public class AtomicIntegerFieldUpdaterTest extends TestCase{ |
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volatile int x = 0; |
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public static void main(String[] args){ |
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junit.textui.TestRunner.run(suite()); |
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} |
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public static Test suite() { |
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return new TestSuite(AtomicIntegerFieldUpdaterTest.class); |
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} |
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public void testConstructor(){ |
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try{ |
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AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> |
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a = AtomicIntegerFieldUpdater.newUpdater |
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(getClass(), "y"); |
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fail("Exception not thrown"); |
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} |
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catch (RuntimeException rt) {} |
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} |
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public void testGetSet(){ |
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AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x"); |
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x = 1; |
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assertEquals(1,a.get(this)); |
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a.set(this,2); |
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assertEquals(2,a.get(this)); |
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a.set(this,-3); |
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assertEquals(-3,a.get(this)); |
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} |
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public void testCompareAndSet(){ |
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AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x"); |
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x = 1; |
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assertTrue(a.compareAndSet(this,1,2)); |
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assertTrue(a.compareAndSet(this,2,-4)); |
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assertEquals(-4,a.get(this)); |
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assertFalse(a.compareAndSet(this,-5,7)); |
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assertFalse((7 == a.get(this))); |
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assertTrue(a.compareAndSet(this,-4,7)); |
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assertEquals(7,a.get(this)); |
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} |
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public void testWeakCompareAndSet(){ |
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AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x"); |
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x = 1; |
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while(!a.weakCompareAndSet(this,1,2)); |
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while(!a.weakCompareAndSet(this,2,-4)); |
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assertEquals(-4,a.get(this)); |
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while(!a.weakCompareAndSet(this,-4,7)); |
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assertEquals(7,a.get(this)); |
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} |
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public void testGetAndSet(){ |
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AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x"); |
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x = 1; |
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assertEquals(1,a.getAndSet(this, 0)); |
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assertEquals(0,a.getAndSet(this,-10)); |
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assertEquals(-10,a.getAndSet(this,1)); |
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} |
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public void testGetAndAdd(){ |
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AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x"); |
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x = 1; |
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assertEquals(1,a.getAndAdd(this,2)); |
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assertEquals(3,a.get(this)); |
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assertEquals(3,a.getAndAdd(this,-4)); |
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assertEquals(-1,a.get(this)); |
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} |
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public void testGetAndDecrement(){ |
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AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x"); |
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x = 1; |
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assertEquals(1,a.getAndDecrement(this)); |
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assertEquals(0,a.getAndDecrement(this)); |
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assertEquals(-1,a.getAndDecrement(this)); |
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} |
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public void testGetAndIncrement(){ |
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AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x"); |
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x = 1; |
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assertEquals(1,a.getAndIncrement(this)); |
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assertEquals(2,a.get(this)); |
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a.set(this,-2); |
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assertEquals(-2,a.getAndIncrement(this)); |
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assertEquals(-1,a.getAndIncrement(this)); |
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assertEquals(0,a.getAndIncrement(this)); |
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assertEquals(1,a.get(this)); |
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} |
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public void testAddAndGet(){ |
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AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x"); |
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x = 1; |
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assertEquals(3,a.addAndGet(this,2)); |
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assertEquals(3,a.get(this)); |
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assertEquals(-1,a.addAndGet(this,-4)); |
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assertEquals(-1,a.get(this)); |
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} |
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public void testDecrementAndGet(){ |
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AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x"); |
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x = 1; |
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assertEquals(0,a.decrementAndGet(this)); |
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assertEquals(-1,a.decrementAndGet(this)); |
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assertEquals(-2,a.decrementAndGet(this)); |
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assertEquals(-2,a.get(this)); |
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} |
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public void testIncrementAndGet(){ |
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AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x"); |
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x = 1; |
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assertEquals(2,a.incrementAndGet(this)); |
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assertEquals(2,a.get(this)); |
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a.set(this,-2); |
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assertEquals(-1,a.incrementAndGet(this)); |
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assertEquals(0,a.incrementAndGet(this)); |
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assertEquals(1,a.incrementAndGet(this)); |
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assertEquals(1,a.get(this)); |
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} |
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} |
