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root/jsr166/jsr166/src/test/tck/AtomicReferenceFieldUpdaterTest.java
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Comparing jsr166/src/test/tck/AtomicReferenceFieldUpdaterTest.java (file contents):
Revision 1.3 by dl, Sat Sep 20 18:20:07 2003 UTC vs.
Revision 1.4 by dl, Thu Sep 25 11:02:41 2003 UTC

# Line 17 | Line 17 | public class AtomicReferenceFieldUpdater
17      public static void main(String[] args){
18          junit.textui.TestRunner.run(suite());
19      }
20 –
21 –  
20      public static Test suite() {
21          return new TestSuite(AtomicReferenceFieldUpdaterTest.class);
22      }
23  
24      /**
25 <     *
25 >     * Contruction with non-existent field throws RuntimeException
26       */
27      public void testConstructor(){
28          try{
# Line 38 | Line 36 | public class AtomicReferenceFieldUpdater
36  
37  
38      /**
39 <     *
39 >     * construction with field not of given type throws RuntimeException
40       */
41      public void testConstructor2(){
42          try{
# Line 51 | Line 49 | public class AtomicReferenceFieldUpdater
49      }
50  
51      /**
52 <     *
52 >     * Constructor with non-volatile field throws exception
53       */
54      public void testConstructor3(){
55          try{
# Line 64 | Line 62 | public class AtomicReferenceFieldUpdater
62      }
63  
64      /**
65 <     *
65 >     *  get returns the last value set or assigned
66       */
67      public void testGetSet(){
68          AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a = AtomicReferenceFieldUpdater.newUpdater(getClass(), Integer.class, "x");
# Line 77 | Line 75 | public class AtomicReferenceFieldUpdater
75          
76      }
77      /**
78 <     *
78 >     * compareAndSet succeeds in changing value if equal to expected else fails
79       */
80      public void testCompareAndSet(){
81          AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a = AtomicReferenceFieldUpdater.newUpdater(getClass(), Integer.class, "x");
# Line 92 | Line 90 | public class AtomicReferenceFieldUpdater
90      }
91  
92      /**
93 <     *
93 >     * compareAndSet in one thread enables another waiting for value
94 >     * to succeed
95 >     */
96 >    public void testCompareAndSetInMultipleThreads() {
97 >        x = one;
98 >        final AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a = AtomicReferenceFieldUpdater.newUpdater(getClass(), Integer.class, "x");
99 >
100 >        Thread t = new Thread(new Runnable() {
101 >                public void run() {
102 >                    while(!a.compareAndSet(AtomicReferenceFieldUpdaterTest.this, two, three)) Thread.yield();
103 >                }});
104 >        try {
105 >            t.start();
106 >            assertTrue(a.compareAndSet(this, one, two));
107 >            t.join(LONG_DELAY_MS);
108 >            assertFalse(t.isAlive());
109 >            assertEquals(a.get(this), three);
110 >        }
111 >        catch(Exception e) {
112 >            unexpectedException();
113 >        }
114 >    }
115 >
116 >    /**
117 >     * repeated weakCompareAndSet succeeds in changing value when equal
118 >     * to expected
119       */
120      public void testWeakCompareAndSet(){
121          AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a = AtomicReferenceFieldUpdater.newUpdater(getClass(), Integer.class, "x");
# Line 105 | Line 128 | public class AtomicReferenceFieldUpdater
128      }
129  
130      /**
131 <     *
131 >     * getAndSet returns previous value and sets to given value
132       */
133      public void testGetAndSet(){
134          AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a = AtomicReferenceFieldUpdater.newUpdater(getClass(), Integer.class, "x");

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