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root/jsr166/jsr166/src/test/tck/AtomicIntegerFieldUpdaterTest.java
Revision: 1.3
Committed: Sat Sep 20 18:20:07 2003 UTC (20 years, 8 months ago) by dl
Branch: MAIN
Changes since 1.2: +50 -14 lines
Log Message: 
Documentation scaffolding

File Contents

# User Rev Content
1 dl 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.
6     */
7    
8     import java.util.concurrent.atomic.*;
9     import junit.framework.*;
10     import java.util.*;
11    
12 dl 1.2 public class AtomicIntegerFieldUpdaterTest extends JSR166TestCase {
13 dl 1.1 volatile int x = 0;
14 dl 1.2 long z;
15 dl 1.1
16     public static void main(String[] args){
17     junit.textui.TestRunner.run(suite());
18     }
19    
20    
21     public static Test suite() {
22     return new TestSuite(AtomicIntegerFieldUpdaterTest.class);
23     }
24    
25 dl 1.3 /**
26     *
27     */
28     public void testConstructor() {
29 dl 1.1 try{
30     AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest>
31     a = AtomicIntegerFieldUpdater.newUpdater
32     (getClass(), "y");
33 dl 1.3 shouldThrow();
34 dl 1.2 }
35     catch (RuntimeException rt) {}
36     }
37    
38 dl 1.3 /**
39     *
40     */
41     public void testConstructor2() {
42 dl 1.2 try{
43     AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest>
44     a = AtomicIntegerFieldUpdater.newUpdater
45     (getClass(), "z");
46 dl 1.3 shouldThrow();
47 dl 1.1 }
48     catch (RuntimeException rt) {}
49     }
50    
51 dl 1.3 /**
52     *
53     */
54     public void testGetSet() {
55 dl 1.1 AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
56     x = 1;
57     assertEquals(1,a.get(this));
58     a.set(this,2);
59     assertEquals(2,a.get(this));
60     a.set(this,-3);
61     assertEquals(-3,a.get(this));
62    
63     }
64 dl 1.3 /**
65     *
66     */
67     public void testCompareAndSet() {
68 dl 1.1 AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
69     x = 1;
70     assertTrue(a.compareAndSet(this,1,2));
71     assertTrue(a.compareAndSet(this,2,-4));
72     assertEquals(-4,a.get(this));
73     assertFalse(a.compareAndSet(this,-5,7));
74     assertFalse((7 == a.get(this)));
75     assertTrue(a.compareAndSet(this,-4,7));
76     assertEquals(7,a.get(this));
77     }
78    
79 dl 1.3 /**
80     *
81     */
82     public void testWeakCompareAndSet() {
83 dl 1.1 AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
84     x = 1;
85     while(!a.weakCompareAndSet(this,1,2));
86     while(!a.weakCompareAndSet(this,2,-4));
87     assertEquals(-4,a.get(this));
88     while(!a.weakCompareAndSet(this,-4,7));
89     assertEquals(7,a.get(this));
90     }
91    
92 dl 1.3 /**
93     *
94     */
95     public void testGetAndSet() {
96 dl 1.1 AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
97     x = 1;
98     assertEquals(1,a.getAndSet(this, 0));
99     assertEquals(0,a.getAndSet(this,-10));
100     assertEquals(-10,a.getAndSet(this,1));
101     }
102    
103 dl 1.3 /**
104     *
105     */
106     public void testGetAndAdd() {
107 dl 1.1 AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
108     x = 1;
109     assertEquals(1,a.getAndAdd(this,2));
110     assertEquals(3,a.get(this));
111     assertEquals(3,a.getAndAdd(this,-4));
112     assertEquals(-1,a.get(this));
113     }
114    
115 dl 1.3 /**
116     *
117     */
118     public void testGetAndDecrement() {
119 dl 1.1 AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
120     x = 1;
121     assertEquals(1,a.getAndDecrement(this));
122     assertEquals(0,a.getAndDecrement(this));
123     assertEquals(-1,a.getAndDecrement(this));
124     }
125    
126 dl 1.3 /**
127     *
128     */
129     public void testGetAndIncrement() {
130 dl 1.1 AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
131     x = 1;
132     assertEquals(1,a.getAndIncrement(this));
133     assertEquals(2,a.get(this));
134     a.set(this,-2);
135     assertEquals(-2,a.getAndIncrement(this));
136     assertEquals(-1,a.getAndIncrement(this));
137     assertEquals(0,a.getAndIncrement(this));
138     assertEquals(1,a.get(this));
139     }
140    
141 dl 1.3 /**
142     *
143     */
144     public void testAddAndGet() {
145 dl 1.1 AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
146     x = 1;
147     assertEquals(3,a.addAndGet(this,2));
148     assertEquals(3,a.get(this));
149     assertEquals(-1,a.addAndGet(this,-4));
150     assertEquals(-1,a.get(this));
151     }
152    
153 dl 1.3 /**
154     *
155     */
156     public void testDecrementAndGet() {
157 dl 1.1 AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
158     x = 1;
159     assertEquals(0,a.decrementAndGet(this));
160     assertEquals(-1,a.decrementAndGet(this));
161     assertEquals(-2,a.decrementAndGet(this));
162     assertEquals(-2,a.get(this));
163     }
164    
165 dl 1.3 /**
166     *
167     */
168     public void testIncrementAndGet() {
169 dl 1.1 AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
170     x = 1;
171     assertEquals(2,a.incrementAndGet(this));
172     assertEquals(2,a.get(this));
173     a.set(this,-2);
174     assertEquals(-1,a.incrementAndGet(this));
175     assertEquals(0,a.incrementAndGet(this));
176     assertEquals(1,a.incrementAndGet(this));
177     assertEquals(1,a.get(this));
178     }
179    
180     }