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* Pat Fisher, Mike Judd. |
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*/ |
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import junit.framework.*; |
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import java.util.concurrent.atomic.AtomicLongFieldUpdater; |
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import junit.framework.Test; |
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import junit.framework.TestSuite; |
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public class AtomicLongFieldUpdaterTest extends JSR166TestCase { |
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volatile long x = 0; |
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int z; |
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protected volatile long protectedField; |
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private volatile long privateField; |
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long w; |
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|
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float z; |
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public static void main(String[] args) { |
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junit.textui.TestRunner.run(suite()); |
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main(suite(), args); |
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} |
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public static Test suite() { |
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return new TestSuite(AtomicLongFieldUpdaterTest.class); |
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updaterFor("y"); |
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shouldThrow(); |
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} catch (RuntimeException success) { |
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assertTrue(success.getCause() != null); |
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assertNotNull(success.getCause()); |
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} |
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} |
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} |
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/** |
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* construction using private field from subclass throws RuntimeException |
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*/ |
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public void testPrivateFieldInSubclass() { |
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new NonNestmates.AtomicLongFieldUpdaterTestSubclass() |
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.checkPrivateAccess(); |
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} |
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|
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/** |
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* construction from unrelated class; package access is allowed, |
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* private access is not |
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*/ |
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public void testUnrelatedClassAccess() { |
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new NonNestmates().checkPackageAccess(this); |
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new NonNestmates().checkPrivateAccess(this); |
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} |
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|
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/** |
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* get returns the last value set or assigned |
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*/ |
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public void testGetSet() { |
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} |
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/** |
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* compareAndSet succeeds in changing protected field value if |
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* equal to expected else fails |
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*/ |
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public void testCompareAndSetProtected() { |
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AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a; |
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a = updaterFor("protectedField"); |
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protectedField = 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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assertEquals(-4, 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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|
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/** |
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* compareAndSet succeeds in changing protected field value if |
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* equal to expected else fails |
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*/ |
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public void testCompareAndSetProtectedInSubclass() { |
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new NonNestmates.AtomicLongFieldUpdaterTestSubclass() |
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.checkCompareAndSetProtectedSub(); |
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} |
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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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AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a; |
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a = updaterFor("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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do {} while (!a.weakCompareAndSet(this, 1, 2)); |
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do {} 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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do {} while (!a.weakCompareAndSet(this, -4, 7)); |
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assertEquals(7, a.get(this)); |
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} |
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