| Methods Summary |
|---|
| public static void | main(java.lang.String[] args)
junit.textui.TestRunner.run (suite());
|
| public static junit.framework.Test | suite()
return new TestSuite(AtomicIntegerTest.class);
|
| public void | testAddAndGet()addAndGet adds given value to current, and returns current value
AtomicInteger ai = new AtomicInteger(1);
assertEquals(3,ai.addAndGet(2));
assertEquals(3,ai.get());
assertEquals(-1,ai.addAndGet(-4));
assertEquals(-1,ai.get());
|
| public void | testCompareAndSet()compareAndSet succeeds in changing value if equal to expected else fails
AtomicInteger ai = new AtomicInteger(1);
assertTrue(ai.compareAndSet(1,2));
assertTrue(ai.compareAndSet(2,-4));
assertEquals(-4,ai.get());
assertFalse(ai.compareAndSet(-5,7));
assertFalse((7 == ai.get()));
assertTrue(ai.compareAndSet(-4,7));
assertEquals(7,ai.get());
|
| public void | testCompareAndSetInMultipleThreads()compareAndSet in one thread enables another waiting for value
to succeed
final AtomicInteger ai = new AtomicInteger(1);
Thread t = new Thread(new Runnable() {
public void run() {
while(!ai.compareAndSet(2, 3)) Thread.yield();
}});
try {
t.start();
assertTrue(ai.compareAndSet(1, 2));
t.join(LONG_DELAY_MS);
assertFalse(t.isAlive());
assertEquals(ai.get(), 3);
}
catch(Exception e) {
unexpectedException();
}
|
| public void | testConstructor()constructor initializes to given value
AtomicInteger ai = new AtomicInteger(1);
assertEquals(1,ai.get());
|
| public void | testConstructor2()default constructed initializes to zero
AtomicInteger ai = new AtomicInteger();
assertEquals(0,ai.get());
|
| public void | testDecrementAndGet()decrementAndGet decrements and returns current value
AtomicInteger ai = new AtomicInteger(1);
assertEquals(0,ai.decrementAndGet());
assertEquals(-1,ai.decrementAndGet());
assertEquals(-2,ai.decrementAndGet());
assertEquals(-2,ai.get());
|
| public void | testDoubleValue()doubleValue returns current value.
AtomicInteger ai = new AtomicInteger();
for (int i = -12; i < 6; ++i) {
ai.set(i);
assertEquals((double)i, ai.doubleValue());
}
|
| public void | testFloatValue()floatValue returns current value.
AtomicInteger ai = new AtomicInteger();
for (int i = -12; i < 6; ++i) {
ai.set(i);
assertEquals((float)i, ai.floatValue());
}
|
| public void | testGetAndAdd()getAndAdd returns previous value and adds given value
AtomicInteger ai = new AtomicInteger(1);
assertEquals(1,ai.getAndAdd(2));
assertEquals(3,ai.get());
assertEquals(3,ai.getAndAdd(-4));
assertEquals(-1,ai.get());
|
| public void | testGetAndDecrement()getAndDecrement returns previous value and decrements
AtomicInteger ai = new AtomicInteger(1);
assertEquals(1,ai.getAndDecrement());
assertEquals(0,ai.getAndDecrement());
assertEquals(-1,ai.getAndDecrement());
|
| public void | testGetAndIncrement()getAndIncrement returns previous value and increments
AtomicInteger ai = new AtomicInteger(1);
assertEquals(1,ai.getAndIncrement());
assertEquals(2,ai.get());
ai.set(-2);
assertEquals(-2,ai.getAndIncrement());
assertEquals(-1,ai.getAndIncrement());
assertEquals(0,ai.getAndIncrement());
assertEquals(1,ai.get());
|
| public void | testGetAndSet()getAndSet returns previous value and sets to given value
AtomicInteger ai = new AtomicInteger(1);
assertEquals(1,ai.getAndSet(0));
assertEquals(0,ai.getAndSet(-10));
assertEquals(-10,ai.getAndSet(1));
|
| public void | testGetSet()get returns the last value set
AtomicInteger ai = new AtomicInteger(1);
assertEquals(1,ai.get());
ai.set(2);
assertEquals(2,ai.get());
ai.set(-3);
assertEquals(-3,ai.get());
|
| public void | testIncrementAndGet()incrementAndGet increments and returns current value
AtomicInteger ai = new AtomicInteger(1);
assertEquals(2,ai.incrementAndGet());
assertEquals(2,ai.get());
ai.set(-2);
assertEquals(-1,ai.incrementAndGet());
assertEquals(0,ai.incrementAndGet());
assertEquals(1,ai.incrementAndGet());
assertEquals(1,ai.get());
|
| public void | testIntValue()intValue returns current value.
AtomicInteger ai = new AtomicInteger();
for (int i = -12; i < 6; ++i) {
ai.set(i);
assertEquals(i, ai.intValue());
}
|
| public void | testLongValue()longValue returns current value.
AtomicInteger ai = new AtomicInteger();
for (int i = -12; i < 6; ++i) {
ai.set(i);
assertEquals((long)i, ai.longValue());
}
|
| public void | testSerialization()a deserialized serialized atomic holds same value
AtomicInteger l = new AtomicInteger();
try {
l.set(22);
ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
out.writeObject(l);
out.close();
ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
AtomicInteger r = (AtomicInteger) in.readObject();
assertEquals(l.get(), r.get());
} catch(Exception e){
unexpectedException();
}
|
| public void | testToString()toString returns current value.
AtomicInteger ai = new AtomicInteger();
for (int i = -12; i < 6; ++i) {
ai.set(i);
assertEquals(ai.toString(), Integer.toString(i));
}
|
| public void | testWeakCompareAndSet()repeated weakCompareAndSet succeeds in changing value when equal
to expected
AtomicInteger ai = new AtomicInteger(1);
while(!ai.weakCompareAndSet(1,2));
while(!ai.weakCompareAndSet(2,-4));
assertEquals(-4,ai.get());
while(!ai.weakCompareAndSet(-4,7));
assertEquals(7,ai.get());
|
