ViewVC Help
View File | Revision Log | Show Annotations | Download File | Root Listing
root/jsr166/jsr166/src/test/tck/AtomicBooleanTest.java
(Generate patch)

Comparing jsr166/src/test/tck/AtomicBooleanTest.java (file contents):
Revision 1.4 by dl, Sat Sep 20 18:20:07 2003 UTC vs.
Revision 1.12 by jsr166, Mon Nov 16 05:30:07 2009 UTC

# Line 1 | Line 1
1   /*
2 < * Written by members of JCP JSR-166 Expert Group and released to the
3 < * public domain. Use, modify, and redistribute this code in any way
4 < * without acknowledgement. Other contributors include Andrew Wright,
5 < * Jeffrey Hayes, Pat Fischer, Mike Judd.
2 > * Written by Doug Lea with assistance from members of JCP JSR-166
3 > * Expert Group and released to the public domain, as explained at
4 > * http://creativecommons.org/licenses/publicdomain
5 > * Other contributors include Andrew Wright, Jeffrey Hayes,
6 > * Pat Fisher, Mike Judd.
7   */
8  
9   import junit.framework.*;
# Line 18 | Line 19 | public class AtomicBooleanTest extends J
19      }
20  
21      /**
22 <     *
22 >     * constructor initializes to given value
23       */
24      public void testConstructor() {
25          AtomicBoolean ai = new AtomicBoolean(true);
# Line 26 | Line 27 | public class AtomicBooleanTest extends J
27      }
28  
29      /**
30 <     *
30 >     * default constructed initializes to false
31       */
32      public void testConstructor2() {
33          AtomicBoolean ai = new AtomicBoolean();
# Line 34 | Line 35 | public class AtomicBooleanTest extends J
35      }
36  
37      /**
38 <     *
38 >     * get returns the last value set
39       */
40      public void testGetSet() {
41          AtomicBoolean ai = new AtomicBoolean(true);
# Line 43 | Line 44 | public class AtomicBooleanTest extends J
44          assertEquals(false,ai.get());
45          ai.set(true);
46          assertEquals(true,ai.get());
47 <        
47 >
48 >    }
49 >
50 >    /**
51 >     * get returns the last value lazySet in same thread
52 >     */
53 >    public void testGetLazySet() {
54 >        AtomicBoolean ai = new AtomicBoolean(true);
55 >        assertEquals(true,ai.get());
56 >        ai.lazySet(false);
57 >        assertEquals(false,ai.get());
58 >        ai.lazySet(true);
59 >        assertEquals(true,ai.get());
60 >
61      }
62 +
63      /**
64 <     *
64 >     * compareAndSet succeeds in changing value if equal to expected else fails
65       */
66      public void testCompareAndSet() {
67          AtomicBoolean ai = new AtomicBoolean(true);
# Line 61 | Line 76 | public class AtomicBooleanTest extends J
76      }
77  
78      /**
79 <     *
79 >     * compareAndSet in one thread enables another waiting for value
80 >     * to succeed
81 >     */
82 >    public void testCompareAndSetInMultipleThreads() {
83 >        final AtomicBoolean ai = new AtomicBoolean(true);
84 >        Thread t = new Thread(new Runnable() {
85 >                public void run() {
86 >                    while (!ai.compareAndSet(false, true)) Thread.yield();
87 >                }});
88 >        try {
89 >            t.start();
90 >            assertTrue(ai.compareAndSet(true, false));
91 >            t.join(LONG_DELAY_MS);
92 >            assertFalse(t.isAlive());
93 >        }
94 >        catch (Exception e) {
95 >            unexpectedException();
96 >        }
97 >    }
98 >
99 >    /**
100 >     * repeated weakCompareAndSet succeeds in changing value when equal
101 >     * to expected
102       */
103      public void testWeakCompareAndSet() {
104          AtomicBoolean ai = new AtomicBoolean(true);
105 <        while(!ai.weakCompareAndSet(true,false));
105 >        while (!ai.weakCompareAndSet(true,false));
106          assertEquals(false,ai.get());
107 <        while(!ai.weakCompareAndSet(false,false));
107 >        while (!ai.weakCompareAndSet(false,false));
108          assertEquals(false,ai.get());
109 <        while(!ai.weakCompareAndSet(false,true));
109 >        while (!ai.weakCompareAndSet(false,true));
110          assertEquals(true,ai.get());
111      }
112  
113      /**
114 <     *
114 >     * getAndSet returns previous value and sets to given value
115       */
116      public void testGetAndSet() {
117          AtomicBoolean ai = new AtomicBoolean(true);
# Line 85 | Line 122 | public class AtomicBooleanTest extends J
122      }
123  
124      /**
125 <     *
125 >     * a deserialized serialized atomic holds same value
126       */
127      public void testSerialization() {
128          AtomicBoolean l = new AtomicBoolean();
# Line 101 | Line 138 | public class AtomicBooleanTest extends J
138              ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
139              AtomicBoolean r = (AtomicBoolean) in.readObject();
140              assertEquals(l.get(), r.get());
141 <        } catch(Exception e){
141 >        } catch (Exception e) {
142              e.printStackTrace();
143              unexpectedException();
144          }
145      }
146  
147 +    /**
148 +     * toString returns current value.
149 +     */
150 +    public void testToString() {
151 +        AtomicBoolean ai = new AtomicBoolean();
152 +        assertEquals(ai.toString(), Boolean.toString(false));
153 +        ai.set(true);
154 +        assertEquals(ai.toString(), Boolean.toString(true));
155 +    }
156  
157   }

Diff Legend

– Removed lines
+ Added lines
< Changed lines
> Changed lines