1 |
/* |
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/publicdomain/zero/1.0/ |
5 |
*/ |
6 |
|
7 |
import java.util.concurrent.atomic.AtomicInteger; |
8 |
|
9 |
import junit.framework.Test; |
10 |
import junit.framework.TestSuite; |
11 |
|
12 |
public class AtomicInteger9Test extends JSR166TestCase { |
13 |
public static void main(String[] args) { |
14 |
main(suite(), args); |
15 |
} |
16 |
public static Test suite() { |
17 |
return new TestSuite(AtomicInteger9Test.class); |
18 |
} |
19 |
|
20 |
/** |
21 |
* getPlain returns the last value set |
22 |
*/ |
23 |
public void testGetPlainSet() { |
24 |
AtomicInteger ai = new AtomicInteger(1); |
25 |
assertEquals(1, ai.getPlain()); |
26 |
ai.set(2); |
27 |
assertEquals(2, ai.getPlain()); |
28 |
ai.set(-3); |
29 |
assertEquals(-3, ai.getPlain()); |
30 |
} |
31 |
|
32 |
/** |
33 |
* getOpaque returns the last value set |
34 |
*/ |
35 |
public void testGetOpaqueSet() { |
36 |
AtomicInteger ai = new AtomicInteger(1); |
37 |
assertEquals(1, ai.getOpaque()); |
38 |
ai.set(2); |
39 |
assertEquals(2, ai.getOpaque()); |
40 |
ai.set(-3); |
41 |
assertEquals(-3, ai.getOpaque()); |
42 |
} |
43 |
|
44 |
/** |
45 |
* getAcquire returns the last value set |
46 |
*/ |
47 |
public void testGetAcquireSet() { |
48 |
AtomicInteger ai = new AtomicInteger(1); |
49 |
assertEquals(1, ai.getAcquire()); |
50 |
ai.set(2); |
51 |
assertEquals(2, ai.getAcquire()); |
52 |
ai.set(-3); |
53 |
assertEquals(-3, ai.getAcquire()); |
54 |
} |
55 |
|
56 |
/** |
57 |
* get returns the last value setPlain |
58 |
*/ |
59 |
public void testGetSetPlain() { |
60 |
AtomicInteger ai = new AtomicInteger(1); |
61 |
assertEquals(1, ai.get()); |
62 |
ai.setPlain(2); |
63 |
assertEquals(2, ai.get()); |
64 |
ai.setPlain(-3); |
65 |
assertEquals(-3, ai.get()); |
66 |
} |
67 |
|
68 |
/** |
69 |
* get returns the last value setOpaque |
70 |
*/ |
71 |
public void testGetSetOpaque() { |
72 |
AtomicInteger ai = new AtomicInteger(1); |
73 |
assertEquals(1, ai.get()); |
74 |
ai.setOpaque(2); |
75 |
assertEquals(2, ai.get()); |
76 |
ai.setOpaque(-3); |
77 |
assertEquals(-3, ai.get()); |
78 |
} |
79 |
|
80 |
/** |
81 |
* get returns the last value setRelease |
82 |
*/ |
83 |
public void testGetSetRelease() { |
84 |
AtomicInteger ai = new AtomicInteger(1); |
85 |
assertEquals(1, ai.get()); |
86 |
ai.setRelease(2); |
87 |
assertEquals(2, ai.get()); |
88 |
ai.setRelease(-3); |
89 |
assertEquals(-3, ai.get()); |
90 |
} |
91 |
|
92 |
/** |
93 |
* compareAndExchange succeeds in changing value if equal to |
94 |
* expected else fails |
95 |
*/ |
96 |
public void testCompareAndExchange() { |
97 |
AtomicInteger ai = new AtomicInteger(1); |
98 |
assertEquals(1, ai.compareAndExchange(1, 2)); |
99 |
assertEquals(2, ai.compareAndExchange(2, -4)); |
100 |
assertEquals(-4, ai.get()); |
101 |
assertEquals(-4, ai.compareAndExchange(-5, 7)); |
102 |
assertEquals(-4, ai.get()); |
103 |
assertEquals(-4, ai.compareAndExchange(-4, 7)); |
104 |
assertEquals(7, ai.get()); |
105 |
} |
106 |
|
107 |
/** |
108 |
* compareAndExchangeAcquire succeeds in changing value if equal to |
109 |
* expected else fails |
110 |
*/ |
111 |
public void testCompareAndExchangeAcquire() { |
112 |
AtomicInteger ai = new AtomicInteger(1); |
113 |
assertEquals(1, ai.compareAndExchangeAcquire(1, 2)); |
114 |
assertEquals(2, ai.compareAndExchangeAcquire(2, -4)); |
115 |
assertEquals(-4, ai.get()); |
116 |
assertEquals(-4, ai.compareAndExchangeAcquire(-5, 7)); |
117 |
assertEquals(-4, ai.get()); |
118 |
assertEquals(-4, ai.compareAndExchangeAcquire(-4, 7)); |
119 |
assertEquals(7, ai.get()); |
120 |
} |
121 |
|
122 |
/** |
123 |
* compareAndExchangeRelease succeeds in changing value if equal to |
124 |
* expected else fails |
125 |
*/ |
126 |
public void testCompareAndExchangeRelease() { |
127 |
AtomicInteger ai = new AtomicInteger(1); |
128 |
assertEquals(1, ai.compareAndExchangeRelease(1, 2)); |
129 |
assertEquals(2, ai.compareAndExchangeRelease(2, -4)); |
130 |
assertEquals(-4, ai.get()); |
131 |
assertEquals(-4, ai.compareAndExchangeRelease(-5, 7)); |
132 |
assertEquals(-4, ai.get()); |
133 |
assertEquals(-4, ai.compareAndExchangeRelease(-4, 7)); |
134 |
assertEquals(7, ai.get()); |
135 |
} |
136 |
|
137 |
/** |
138 |
* repeated weakCompareAndSetPlain succeeds in changing value when equal |
139 |
* to expected |
140 |
*/ |
141 |
public void testWeakCompareAndSetPlain() { |
142 |
AtomicInteger ai = new AtomicInteger(1); |
143 |
do {} while (!ai.weakCompareAndSetPlain(1, 2)); |
144 |
do {} while (!ai.weakCompareAndSetPlain(2, -4)); |
145 |
assertEquals(-4, ai.get()); |
146 |
do {} while (!ai.weakCompareAndSetPlain(-4, 7)); |
147 |
assertEquals(7, ai.get()); |
148 |
} |
149 |
|
150 |
/** |
151 |
* repeated weakCompareAndSetVolatile succeeds in changing value when equal |
152 |
* to expected |
153 |
*/ |
154 |
public void testWeakCompareAndSetVolatile() { |
155 |
AtomicInteger ai = new AtomicInteger(1); |
156 |
do {} while (!ai.weakCompareAndSetVolatile(1, 2)); |
157 |
do {} while (!ai.weakCompareAndSetVolatile(2, -4)); |
158 |
assertEquals(-4, ai.get()); |
159 |
do {} while (!ai.weakCompareAndSetVolatile(-4, 7)); |
160 |
assertEquals(7, ai.get()); |
161 |
} |
162 |
|
163 |
/** |
164 |
* repeated weakCompareAndSetAcquire succeeds in changing value when equal |
165 |
* to expected |
166 |
*/ |
167 |
public void testWeakCompareAndSetAcquire() { |
168 |
AtomicInteger ai = new AtomicInteger(1); |
169 |
do {} while (!ai.weakCompareAndSetAcquire(1, 2)); |
170 |
do {} while (!ai.weakCompareAndSetAcquire(2, -4)); |
171 |
assertEquals(-4, ai.get()); |
172 |
do {} while (!ai.weakCompareAndSetAcquire(-4, 7)); |
173 |
assertEquals(7, ai.get()); |
174 |
} |
175 |
|
176 |
/** |
177 |
* repeated weakCompareAndSetRelease succeeds in changing value when equal |
178 |
* to expected |
179 |
*/ |
180 |
public void testWeakCompareAndSetRelease() { |
181 |
AtomicInteger ai = new AtomicInteger(1); |
182 |
do {} while (!ai.weakCompareAndSetRelease(1, 2)); |
183 |
do {} while (!ai.weakCompareAndSetRelease(2, -4)); |
184 |
assertEquals(-4, ai.get()); |
185 |
do {} while (!ai.weakCompareAndSetRelease(-4, 7)); |
186 |
assertEquals(7, ai.get()); |
187 |
} |
188 |
|
189 |
} |