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Comparing jsr166/src/test/tck/AtomicLongFieldUpdaterTest.java (file contents):
Revision 1.1 by dl, Sun Aug 31 19:24:53 2003 UTC vs.
Revision 1.8 by dl, Tue Jan 20 20:20:56 2004 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 java.util.concurrent.atomic.*;
10   import junit.framework.*;
11   import java.util.*;
12  
13 < public class AtomicLongFieldUpdaterTest extends TestCase{
13 > public class AtomicLongFieldUpdaterTest extends JSR166TestCase {
14      volatile long x = 0;
15 <    long z;
16 <    int w;
15 >    int z;
16 >    long w;
17  
18      public static void main(String[] args){
19          junit.textui.TestRunner.run(suite());
20      }
20 –
21 –  
21      public static Test suite() {
22          return new TestSuite(AtomicLongFieldUpdaterTest.class);
23      }
24  
25 +    /**
26 +     * Construction with non-existent field throws RuntimeException
27 +     */
28      public void testConstructor(){
29          try{
30              AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>
31                  a = AtomicLongFieldUpdater.newUpdater
32 <                (getClass(), "y");
33 <            fail("Exception not thrown");
32 >                (AtomicLongFieldUpdaterTest.class, "y");
33 >            shouldThrow();
34          }
33 –
35          catch (RuntimeException rt) {}
36      }
37  
38 +    /**
39 +     * construction with field not of given type throws RuntimeException
40 +     */
41      public void testConstructor2(){
42          try{
43              AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>
44                  a = AtomicLongFieldUpdater.newUpdater
45 <                (getClass(), "z");
46 <            fail("Exception not thrown");
45 >                (AtomicLongFieldUpdaterTest.class, "z");
46 >            shouldThrow();
47          }
44 –
48          catch (RuntimeException rt) {}
49      }
50  
51 +    /**
52 +     * construction with non-volatile field throws RuntimeException
53 +     */
54      public void testConstructor3(){
55          try{
56              AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>
57                  a = AtomicLongFieldUpdater.newUpdater
58 <                (getClass(), "w");
59 <            fail("Exception not thrown");
58 >                (AtomicLongFieldUpdaterTest.class, "w");
59 >            shouldThrow();
60          }
61  
62          catch (RuntimeException rt) {}
63      }
64  
65 +    /**
66 +     *  get returns the last value set or assigned
67 +     */
68      public void testGetSet(){
69 <        AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
69 >        AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
70 >        try {
71 >            a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
72 >        } catch (RuntimeException ok) {
73 >            return;
74 >        }
75          x = 1;
76          assertEquals(1,a.get(this));
77          a.set(this,2);
# Line 66 | Line 80 | public class AtomicLongFieldUpdaterTest
80          assertEquals(-3,a.get(this));
81          
82      }
83 +    /**
84 +     * compareAndSet succeeds in changing value if equal to expected else fails
85 +     */
86      public void testCompareAndSet(){
87 <        AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
87 >        AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
88 >        try {
89 >            a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
90 >        } catch (RuntimeException ok) {
91 >            return;
92 >        }
93          x = 1;
94          assertTrue(a.compareAndSet(this,1,2));
95          assertTrue(a.compareAndSet(this,2,-4));
# Line 78 | Line 100 | public class AtomicLongFieldUpdaterTest
100          assertEquals(7,a.get(this));
101      }
102  
103 +
104 +    /**
105 +     * compareAndSet in one thread enables another waiting for value
106 +     * to succeed
107 +     */
108 +    public void testCompareAndSetInMultipleThreads() {
109 +        x = 1;
110 +        final AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>a;
111 +        try {
112 +            a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
113 +        } catch (RuntimeException ok) {
114 +            return;
115 +        }
116 +
117 +        Thread t = new Thread(new Runnable() {
118 +                public void run() {
119 +                    while(!a.compareAndSet(AtomicLongFieldUpdaterTest.this, 2, 3)) Thread.yield();
120 +                }});
121 +        try {
122 +            t.start();
123 +            assertTrue(a.compareAndSet(this, 1, 2));
124 +            t.join(LONG_DELAY_MS);
125 +            assertFalse(t.isAlive());
126 +            assertEquals(a.get(this), 3);
127 +        }
128 +        catch(Exception e) {
129 +            unexpectedException();
130 +        }
131 +    }
132 +
133 +    /**
134 +     * repeated weakCompareAndSet succeeds in changing value when equal
135 +     * to expected
136 +     */
137      public void testWeakCompareAndSet(){
138 <        AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
138 >        AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
139 >        try {
140 >            a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
141 >        } catch (RuntimeException ok) {
142 >            return;
143 >        }
144          x = 1;
145          while(!a.weakCompareAndSet(this,1,2));
146          while(!a.weakCompareAndSet(this,2,-4));
# Line 88 | Line 149 | public class AtomicLongFieldUpdaterTest
149          assertEquals(7,a.get(this));
150      }
151  
152 +    /**
153 +     *  getAndSet returns previous value and sets to given value
154 +     */
155      public void testGetAndSet(){
156 <        AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
156 >        AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
157 >        try {
158 >            a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
159 >        } catch (RuntimeException ok) {
160 >            return;
161 >        }
162          x = 1;
163          assertEquals(1,a.getAndSet(this, 0));
164          assertEquals(0,a.getAndSet(this,-10));
165          assertEquals(-10,a.getAndSet(this,1));
166      }
167  
168 +    /**
169 +     * getAndAdd returns previous value and adds given value
170 +     */
171      public void testGetAndAdd(){
172 <        AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
172 >        AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
173 >        try {
174 >            a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
175 >        } catch (RuntimeException ok) {
176 >            return;
177 >        }
178          x = 1;
179          assertEquals(1,a.getAndAdd(this,2));
180          assertEquals(3,a.get(this));
# Line 105 | Line 182 | public class AtomicLongFieldUpdaterTest
182          assertEquals(-1,a.get(this));
183      }
184  
185 +    /**
186 +     * getAndDecrement returns previous value and decrements
187 +     */
188      public void testGetAndDecrement(){
189 <        AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
189 >        AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
190 >        try {
191 >            a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
192 >        } catch (RuntimeException ok) {
193 >            return;
194 >        }
195          x = 1;
196          assertEquals(1,a.getAndDecrement(this));
197          assertEquals(0,a.getAndDecrement(this));
198          assertEquals(-1,a.getAndDecrement(this));
199      }
200  
201 +    /**
202 +     * getAndIncrement returns previous value and increments
203 +     */
204      public void testGetAndIncrement(){
205 <        AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
205 >        AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
206 >        try {
207 >            a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
208 >        } catch (RuntimeException ok) {
209 >            return;
210 >        }
211          x = 1;
212          assertEquals(1,a.getAndIncrement(this));
213          assertEquals(2,a.get(this));
# Line 125 | Line 218 | public class AtomicLongFieldUpdaterTest
218          assertEquals(1,a.get(this));
219      }
220  
221 +    /**
222 +     * addAndGet adds given value to current, and returns current value
223 +     */
224      public void testAddAndGet(){
225 <        AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
225 >        AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
226 >        try {
227 >            a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
228 >        } catch (RuntimeException ok) {
229 >            return;
230 >        }
231          x = 1;
232          assertEquals(3,a.addAndGet(this,2));
233          assertEquals(3,a.get(this));
# Line 134 | Line 235 | public class AtomicLongFieldUpdaterTest
235          assertEquals(-1,a.get(this));
236      }
237  
238 +    /**
239 +     *  decrementAndGet decrements and returns current value
240 +     */
241      public void testDecrementAndGet(){
242 <        AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
242 >        AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
243 >        try {
244 >            a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
245 >        } catch (RuntimeException ok) {
246 >            return;
247 >        }
248          x = 1;
249          assertEquals(0,a.decrementAndGet(this));
250          assertEquals(-1,a.decrementAndGet(this));
# Line 143 | Line 252 | public class AtomicLongFieldUpdaterTest
252          assertEquals(-2,a.get(this));
253      }
254  
255 +    /**
256 +     * incrementAndGet increments and returns current value
257 +     */
258      public void testIncrementAndGet(){
259 <        AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
259 >        AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
260 >        try {
261 >            a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
262 >        } catch (RuntimeException ok) {
263 >            return;
264 >        }
265          x = 1;
266          assertEquals(2,a.incrementAndGet(this));
267          assertEquals(2,a.get(this));

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