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import java.io.*; |
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import java.util.*; |
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|
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< |
public class AtomicReferenceArrayTest extends JSR166TestCase |
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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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> |
public class AtomicReferenceArrayTest extends JSR166TestCase { |
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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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* constructor creates array of given size with all elements null |
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*/ |
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< |
public void testConstructor(){ |
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> |
public void testConstructor() { |
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AtomicReferenceArray<Integer> ai = new AtomicReferenceArray<Integer>(SIZE); |
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for (int i = 0; i < SIZE; ++i) { |
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assertNull(ai.get(i)); |
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try { |
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Integer[] a = null; |
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AtomicReferenceArray<Integer> ai = new AtomicReferenceArray<Integer>(a); |
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} catch (NullPointerException success) { |
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} catch (Exception ex) { |
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unexpectedException(); |
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} |
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> |
shouldThrow(); |
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> |
} catch (NullPointerException success) {} |
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} |
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|
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/** |
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/** |
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* get and set for out of bound indices throw IndexOutOfBoundsException |
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*/ |
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< |
public void testIndexing(){ |
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> |
public void testIndexing() { |
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AtomicReferenceArray<Integer> ai = new AtomicReferenceArray<Integer>(SIZE); |
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try { |
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ai.get(SIZE); |
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< |
} catch (IndexOutOfBoundsException success){ |
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> |
shouldThrow(); |
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> |
} catch (IndexOutOfBoundsException success) { |
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} |
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try { |
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ai.get(-1); |
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< |
} catch (IndexOutOfBoundsException success){ |
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> |
shouldThrow(); |
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> |
} catch (IndexOutOfBoundsException success) { |
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} |
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try { |
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ai.set(SIZE, null); |
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< |
} catch (IndexOutOfBoundsException success){ |
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> |
shouldThrow(); |
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> |
} catch (IndexOutOfBoundsException success) { |
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} |
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try { |
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ai.set(-1, null); |
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< |
} catch (IndexOutOfBoundsException success){ |
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> |
shouldThrow(); |
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> |
} catch (IndexOutOfBoundsException success) { |
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} |
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} |
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|
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/** |
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* get returns the last value set at index |
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*/ |
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< |
public void testGetSet(){ |
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> |
public void testGetSet() { |
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AtomicReferenceArray ai = new AtomicReferenceArray(SIZE); |
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for (int i = 0; i < SIZE; ++i) { |
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ai.set(i, one); |
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assertEquals(one,ai.get(i)); |
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> |
assertSame(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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> |
assertSame(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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> |
assertSame(m3,ai.get(i)); |
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} |
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} |
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|
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/** |
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* get returns the last value lazySet at index by same thread |
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*/ |
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< |
public void testGetLazySet(){ |
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> |
public void testGetLazySet() { |
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AtomicReferenceArray ai = new AtomicReferenceArray(SIZE); |
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for (int i = 0; i < SIZE; ++i) { |
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ai.lazySet(i, one); |
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assertEquals(one,ai.get(i)); |
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> |
assertSame(one,ai.get(i)); |
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ai.lazySet(i, two); |
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< |
assertEquals(two,ai.get(i)); |
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> |
assertSame(two,ai.get(i)); |
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ai.lazySet(i, m3); |
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assertEquals(m3,ai.get(i)); |
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> |
assertSame(m3,ai.get(i)); |
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} |
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} |
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|
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/** |
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* compareAndSet succeeds in changing value if equal to expected else fails |
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*/ |
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< |
public void testCompareAndSet(){ |
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> |
public void testCompareAndSet() { |
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AtomicReferenceArray ai = new AtomicReferenceArray(SIZE); |
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for (int i = 0; i < SIZE; ++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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> |
assertSame(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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> |
assertSame(m4,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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> |
assertSame(seven,ai.get(i)); |
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} |
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} |
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* compareAndSet in one thread enables another waiting for value |
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* to succeed |
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*/ |
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< |
public void testCompareAndSetInMultipleThreads() { |
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> |
public void testCompareAndSetInMultipleThreads() throws InterruptedException { |
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final AtomicReferenceArray a = new AtomicReferenceArray(1); |
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a.set(0, one); |
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< |
Thread t = new Thread(new Runnable() { |
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< |
public void run() { |
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< |
while (!a.compareAndSet(0, two, three)) Thread.yield(); |
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< |
}}); |
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< |
try { |
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< |
t.start(); |
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< |
assertTrue(a.compareAndSet(0, one, two)); |
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< |
t.join(LONG_DELAY_MS); |
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< |
assertFalse(t.isAlive()); |
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< |
assertEquals(a.get(0), three); |
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< |
} |
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< |
catch (Exception e) { |
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< |
unexpectedException(); |
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< |
} |
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> |
Thread t = new Thread(new CheckedRunnable() { |
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> |
public void realRun() { |
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> |
while (!a.compareAndSet(0, two, three)) |
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> |
Thread.yield(); |
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> |
}}); |
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> |
|
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> |
t.start(); |
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> |
assertTrue(a.compareAndSet(0, one, two)); |
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> |
t.join(LONG_DELAY_MS); |
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> |
assertFalse(t.isAlive()); |
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> |
assertSame(a.get(0), three); |
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} |
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|
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/** |
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* repeated weakCompareAndSet succeeds in changing value when equal |
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* to expected |
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*/ |
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< |
public void testWeakCompareAndSet(){ |
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> |
public void testWeakCompareAndSet() { |
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AtomicReferenceArray ai = new AtomicReferenceArray(SIZE); |
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for (int i = 0; i < SIZE; ++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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> |
assertSame(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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> |
assertSame(seven,ai.get(i)); |
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} |
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} |
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|
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/** |
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* getAndSet returns previous value and sets to given value at given index |
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*/ |
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< |
public void testGetAndSet(){ |
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> |
public void testGetAndSet() { |
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AtomicReferenceArray ai = new AtomicReferenceArray(SIZE); |
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for (int i = 0; i < SIZE; ++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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> |
assertSame(one,ai.getAndSet(i,zero)); |
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> |
assertSame(zero,ai.getAndSet(i,m10)); |
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> |
assertSame(m10,ai.getAndSet(i,one)); |
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} |
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} |
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|
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/** |
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* a deserialized serialized array holds same values |
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*/ |
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< |
public void testSerialization() { |
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> |
public void testSerialization() throws Exception { |
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AtomicReferenceArray l = new AtomicReferenceArray(SIZE); |
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for (int i = 0; i < SIZE; ++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 < SIZE; ++i) { |
| 200 |
< |
assertEquals(r.get(i), l.get(i)); |
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< |
} |
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< |
} catch (Exception e){ |
| 203 |
< |
unexpectedException(); |
| 187 |
> |
ByteArrayOutputStream bout = new ByteArrayOutputStream(10000); |
| 188 |
> |
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()); |
| 193 |
> |
ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin)); |
| 194 |
> |
AtomicReferenceArray r = (AtomicReferenceArray) in.readObject(); |
| 195 |
> |
assertEquals(l.length(), r.length()); |
| 196 |
> |
for (int i = 0; i < SIZE; ++i) { |
| 197 |
> |
assertEquals(r.get(i), l.get(i)); |
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} |
| 199 |
|
} |
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|
