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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

# Content
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 public class AtomicIntegerFieldUpdaterTest extends JSR166TestCase {
13 volatile int x = 0;
14 long z;
15
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 /**
26 *
27 */
28 public void testConstructor() {
29 try{
30 AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest>
31 a = AtomicIntegerFieldUpdater.newUpdater
32 (getClass(), "y");
33 shouldThrow();
34 }
35 catch (RuntimeException rt) {}
36 }
37
38 /**
39 *
40 */
41 public void testConstructor2() {
42 try{
43 AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest>
44 a = AtomicIntegerFieldUpdater.newUpdater
45 (getClass(), "z");
46 shouldThrow();
47 }
48 catch (RuntimeException rt) {}
49 }
50
51 /**
52 *
53 */
54 public void testGetSet() {
55 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 /**
65 *
66 */
67 public void testCompareAndSet() {
68 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 /**
80 *
81 */
82 public void testWeakCompareAndSet() {
83 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 /**
93 *
94 */
95 public void testGetAndSet() {
96 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 /**
104 *
105 */
106 public void testGetAndAdd() {
107 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 /**
116 *
117 */
118 public void testGetAndDecrement() {
119 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 /**
127 *
128 */
129 public void testGetAndIncrement() {
130 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 /**
142 *
143 */
144 public void testAddAndGet() {
145 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 /**
154 *
155 */
156 public void testDecrementAndGet() {
157 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 /**
166 *
167 */
168 public void testIncrementAndGet() {
169 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 }