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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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|
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import junit.framework.*; |
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import java.util.concurrent.atomic.*; |
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import java.io.*; |
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|
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public class AtomicReferenceArrayTest extends TestCase |
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{ |
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static final int N = 10; |
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|
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static final Integer zero = new Integer(0); |
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static final Integer one = new Integer(1); |
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static final Integer two = new Integer(2); |
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static final Integer m3 = new Integer(-3); |
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static final Integer m4 = new Integer(-4); |
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static final Integer m5 = new Integer(-5); |
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static final Integer seven = new Integer(7); |
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static final Integer m10 = new Integer(-10); |
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|
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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(AtomicReferenceArrayTest.class); |
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} |
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|
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public void testConstructor(){ |
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AtomicReferenceArray<Integer> ai = new AtomicReferenceArray<Integer>(N); |
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for (int i = 0; i < N; ++i) { |
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assertNull(ai.get(i)); |
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} |
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} |
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|
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public void testGetSet(){ |
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AtomicReferenceArray ai = new AtomicReferenceArray(N); |
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for (int i = 0; i < N; ++i) { |
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ai.set(i, one); |
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assertEquals(one,ai.get(i)); |
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ai.set(i, two); |
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assertEquals(two,ai.get(i)); |
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ai.set(i, m3); |
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assertEquals(m3,ai.get(i)); |
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} |
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} |
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|
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public void testCompareAndSet(){ |
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AtomicReferenceArray ai = new AtomicReferenceArray(N); |
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for (int i = 0; i < N; ++i) { |
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ai.set(i, one); |
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assertTrue(ai.compareAndSet(i, one,two)); |
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assertTrue(ai.compareAndSet(i, two,m4)); |
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assertEquals(m4,ai.get(i)); |
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assertFalse(ai.compareAndSet(i, m5,seven)); |
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assertFalse((seven.equals(ai.get(i)))); |
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assertTrue(ai.compareAndSet(i, m4,seven)); |
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assertEquals(seven,ai.get(i)); |
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} |
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} |
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|
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public void testWeakCompareAndSet(){ |
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AtomicReferenceArray ai = new AtomicReferenceArray(N); |
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for (int i = 0; i < N; ++i) { |
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ai.set(i, one); |
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while(!ai.weakCompareAndSet(i, one,two)); |
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while(!ai.weakCompareAndSet(i, two,m4)); |
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assertEquals(m4,ai.get(i)); |
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while(!ai.weakCompareAndSet(i, m4,seven)); |
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assertEquals(seven,ai.get(i)); |
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} |
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} |
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|
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public void testGetAndSet(){ |
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AtomicReferenceArray ai = new AtomicReferenceArray(N); |
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for (int i = 0; i < N; ++i) { |
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ai.set(i, one); |
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assertEquals(one,ai.getAndSet(i,zero)); |
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assertEquals(0,ai.getAndSet(i,m10)); |
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assertEquals(m10,ai.getAndSet(i,one)); |
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} |
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} |
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|
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public void testSerialization() { |
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AtomicReferenceArray l = new AtomicReferenceArray(10); |
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for (int i = 0; i < 10; ++i) { |
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l.set(i, new Integer(-i)); |
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} |
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|
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try { |
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ByteArrayOutputStream bout = new ByteArrayOutputStream(10000); |
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ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout)); |
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out.writeObject(l); |
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out.close(); |
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|
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ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray()); |
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ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin)); |
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AtomicReferenceArray r = (AtomicReferenceArray) in.readObject(); |
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assertEquals(l.length(), r.length()); |
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for (int i = 0; i < 10; ++i) { |
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assertEquals(r.get(i), l.get(i)); |
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} |
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} catch(Exception e){ |
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e.printStackTrace(); |
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fail("unexpected exception"); |
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} |
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} |
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|
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} |
