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.*; |
11 |
|
import java.io.*; |
12 |
|
|
13 |
|
public class AtomicIntegerTest extends JSR166TestCase { |
14 |
< |
public static void main (String[] args) { |
15 |
< |
junit.textui.TestRunner.run (suite()); |
14 |
> |
public static void main(String[] args) { |
15 |
> |
junit.textui.TestRunner.run(suite()); |
16 |
|
} |
17 |
|
public static Test suite() { |
18 |
|
return new TestSuite(AtomicIntegerTest.class); |
19 |
|
} |
20 |
|
|
21 |
+ |
final int[] VALUES = { |
22 |
+ |
Integer.MIN_VALUE, -1, 0, 1, 42, Integer.MAX_VALUE, |
23 |
+ |
}; |
24 |
+ |
|
25 |
|
/** |
26 |
|
* constructor initializes to given value |
27 |
|
*/ |
28 |
< |
public void testConstructor(){ |
28 |
> |
public void testConstructor() { |
29 |
|
AtomicInteger ai = new AtomicInteger(1); |
30 |
< |
assertEquals(1,ai.get()); |
30 |
> |
assertEquals(1,ai.get()); |
31 |
|
} |
32 |
|
|
33 |
|
/** |
34 |
< |
* default constructed intializes to zero |
34 |
> |
* default constructed initializes to zero |
35 |
|
*/ |
36 |
< |
public void testConstructor2(){ |
36 |
> |
public void testConstructor2() { |
37 |
|
AtomicInteger ai = new AtomicInteger(); |
38 |
< |
assertEquals(0,ai.get()); |
38 |
> |
assertEquals(0,ai.get()); |
39 |
|
} |
40 |
|
|
41 |
|
/** |
42 |
|
* get returns the last value set |
43 |
|
*/ |
44 |
< |
public void testGetSet(){ |
44 |
> |
public void testGetSet() { |
45 |
> |
AtomicInteger ai = new AtomicInteger(1); |
46 |
> |
assertEquals(1,ai.get()); |
47 |
> |
ai.set(2); |
48 |
> |
assertEquals(2,ai.get()); |
49 |
> |
ai.set(-3); |
50 |
> |
assertEquals(-3,ai.get()); |
51 |
> |
} |
52 |
> |
|
53 |
> |
/** |
54 |
> |
* get returns the last value lazySet in same thread |
55 |
> |
*/ |
56 |
> |
public void testGetLazySet() { |
57 |
|
AtomicInteger ai = new AtomicInteger(1); |
58 |
< |
assertEquals(1,ai.get()); |
59 |
< |
ai.set(2); |
60 |
< |
assertEquals(2,ai.get()); |
61 |
< |
ai.set(-3); |
62 |
< |
assertEquals(-3,ai.get()); |
46 |
< |
|
58 |
> |
assertEquals(1,ai.get()); |
59 |
> |
ai.lazySet(2); |
60 |
> |
assertEquals(2,ai.get()); |
61 |
> |
ai.lazySet(-3); |
62 |
> |
assertEquals(-3,ai.get()); |
63 |
|
} |
64 |
+ |
|
65 |
|
/** |
66 |
|
* compareAndSet succeeds in changing value if equal to expected else fails |
67 |
|
*/ |
68 |
< |
public void testCompareAndSet(){ |
68 |
> |
public void testCompareAndSet() { |
69 |
|
AtomicInteger ai = new AtomicInteger(1); |
70 |
< |
assertTrue(ai.compareAndSet(1,2)); |
71 |
< |
assertTrue(ai.compareAndSet(2,-4)); |
72 |
< |
assertEquals(-4,ai.get()); |
73 |
< |
assertFalse(ai.compareAndSet(-5,7)); |
74 |
< |
assertFalse((7 == ai.get())); |
75 |
< |
assertTrue(ai.compareAndSet(-4,7)); |
76 |
< |
assertEquals(7,ai.get()); |
70 |
> |
assertTrue(ai.compareAndSet(1,2)); |
71 |
> |
assertTrue(ai.compareAndSet(2,-4)); |
72 |
> |
assertEquals(-4,ai.get()); |
73 |
> |
assertFalse(ai.compareAndSet(-5,7)); |
74 |
> |
assertEquals(-4,ai.get()); |
75 |
> |
assertTrue(ai.compareAndSet(-4,7)); |
76 |
> |
assertEquals(7,ai.get()); |
77 |
|
} |
78 |
|
|
79 |
|
/** |
80 |
|
* compareAndSet in one thread enables another waiting for value |
81 |
|
* to succeed |
82 |
|
*/ |
83 |
< |
public void testCompareAndSetInMultipleThreads() { |
83 |
> |
public void testCompareAndSetInMultipleThreads() throws Exception { |
84 |
|
final AtomicInteger ai = new AtomicInteger(1); |
85 |
< |
Thread t = new Thread(new Runnable() { |
86 |
< |
public void run() { |
87 |
< |
while(!ai.compareAndSet(2, 3)) Thread.yield(); |
88 |
< |
}}); |
89 |
< |
try { |
90 |
< |
t.start(); |
91 |
< |
assertTrue(ai.compareAndSet(1, 2)); |
92 |
< |
t.join(LONG_DELAY_MS); |
93 |
< |
assertFalse(t.isAlive()); |
94 |
< |
assertEquals(ai.get(), 3); |
95 |
< |
} |
79 |
< |
catch(Exception e) { |
80 |
< |
unexpectedException(); |
81 |
< |
} |
85 |
> |
Thread t = new Thread(new CheckedRunnable() { |
86 |
> |
public void realRun() { |
87 |
> |
while (!ai.compareAndSet(2, 3)) |
88 |
> |
Thread.yield(); |
89 |
> |
}}); |
90 |
> |
|
91 |
> |
t.start(); |
92 |
> |
assertTrue(ai.compareAndSet(1, 2)); |
93 |
> |
t.join(LONG_DELAY_MS); |
94 |
> |
assertFalse(t.isAlive()); |
95 |
> |
assertEquals(ai.get(), 3); |
96 |
|
} |
97 |
|
|
98 |
|
/** |
99 |
|
* repeated weakCompareAndSet succeeds in changing value when equal |
100 |
< |
* to expected |
100 |
> |
* to expected |
101 |
|
*/ |
102 |
< |
public void testWeakCompareAndSet(){ |
102 |
> |
public void testWeakCompareAndSet() { |
103 |
|
AtomicInteger ai = new AtomicInteger(1); |
104 |
< |
while(!ai.weakCompareAndSet(1,2)); |
105 |
< |
while(!ai.weakCompareAndSet(2,-4)); |
106 |
< |
assertEquals(-4,ai.get()); |
107 |
< |
while(!ai.weakCompareAndSet(-4,7)); |
108 |
< |
assertEquals(7,ai.get()); |
104 |
> |
while (!ai.weakCompareAndSet(1,2)); |
105 |
> |
while (!ai.weakCompareAndSet(2,-4)); |
106 |
> |
assertEquals(-4,ai.get()); |
107 |
> |
while (!ai.weakCompareAndSet(-4,7)); |
108 |
> |
assertEquals(7,ai.get()); |
109 |
|
} |
110 |
|
|
111 |
|
/** |
112 |
|
* getAndSet returns previous value and sets to given value |
113 |
|
*/ |
114 |
< |
public void testGetAndSet(){ |
114 |
> |
public void testGetAndSet() { |
115 |
|
AtomicInteger ai = new AtomicInteger(1); |
116 |
< |
assertEquals(1,ai.getAndSet(0)); |
117 |
< |
assertEquals(0,ai.getAndSet(-10)); |
118 |
< |
assertEquals(-10,ai.getAndSet(1)); |
116 |
> |
assertEquals(1,ai.getAndSet(0)); |
117 |
> |
assertEquals(0,ai.getAndSet(-10)); |
118 |
> |
assertEquals(-10,ai.getAndSet(1)); |
119 |
|
} |
120 |
|
|
121 |
|
/** |
122 |
|
* getAndAdd returns previous value and adds given value |
123 |
|
*/ |
124 |
< |
public void testGetAndAdd(){ |
124 |
> |
public void testGetAndAdd() { |
125 |
|
AtomicInteger ai = new AtomicInteger(1); |
126 |
< |
assertEquals(1,ai.getAndAdd(2)); |
127 |
< |
assertEquals(3,ai.get()); |
128 |
< |
assertEquals(3,ai.getAndAdd(-4)); |
129 |
< |
assertEquals(-1,ai.get()); |
126 |
> |
assertEquals(1,ai.getAndAdd(2)); |
127 |
> |
assertEquals(3,ai.get()); |
128 |
> |
assertEquals(3,ai.getAndAdd(-4)); |
129 |
> |
assertEquals(-1,ai.get()); |
130 |
|
} |
131 |
|
|
132 |
|
/** |
133 |
|
* getAndDecrement returns previous value and decrements |
134 |
|
*/ |
135 |
< |
public void testGetAndDecrement(){ |
135 |
> |
public void testGetAndDecrement() { |
136 |
|
AtomicInteger ai = new AtomicInteger(1); |
137 |
< |
assertEquals(1,ai.getAndDecrement()); |
138 |
< |
assertEquals(0,ai.getAndDecrement()); |
139 |
< |
assertEquals(-1,ai.getAndDecrement()); |
137 |
> |
assertEquals(1,ai.getAndDecrement()); |
138 |
> |
assertEquals(0,ai.getAndDecrement()); |
139 |
> |
assertEquals(-1,ai.getAndDecrement()); |
140 |
|
} |
141 |
|
|
142 |
|
/** |
143 |
|
* getAndIncrement returns previous value and increments |
144 |
|
*/ |
145 |
< |
public void testGetAndIncrement(){ |
145 |
> |
public void testGetAndIncrement() { |
146 |
|
AtomicInteger ai = new AtomicInteger(1); |
147 |
< |
assertEquals(1,ai.getAndIncrement()); |
148 |
< |
assertEquals(2,ai.get()); |
149 |
< |
ai.set(-2); |
150 |
< |
assertEquals(-2,ai.getAndIncrement()); |
151 |
< |
assertEquals(-1,ai.getAndIncrement()); |
152 |
< |
assertEquals(0,ai.getAndIncrement()); |
153 |
< |
assertEquals(1,ai.get()); |
147 |
> |
assertEquals(1,ai.getAndIncrement()); |
148 |
> |
assertEquals(2,ai.get()); |
149 |
> |
ai.set(-2); |
150 |
> |
assertEquals(-2,ai.getAndIncrement()); |
151 |
> |
assertEquals(-1,ai.getAndIncrement()); |
152 |
> |
assertEquals(0,ai.getAndIncrement()); |
153 |
> |
assertEquals(1,ai.get()); |
154 |
|
} |
155 |
|
|
156 |
|
/** |
157 |
|
* addAndGet adds given value to current, and returns current value |
158 |
|
*/ |
159 |
< |
public void testAddAndGet(){ |
159 |
> |
public void testAddAndGet() { |
160 |
|
AtomicInteger ai = new AtomicInteger(1); |
161 |
< |
assertEquals(3,ai.addAndGet(2)); |
162 |
< |
assertEquals(3,ai.get()); |
163 |
< |
assertEquals(-1,ai.addAndGet(-4)); |
164 |
< |
assertEquals(-1,ai.get()); |
161 |
> |
assertEquals(3,ai.addAndGet(2)); |
162 |
> |
assertEquals(3,ai.get()); |
163 |
> |
assertEquals(-1,ai.addAndGet(-4)); |
164 |
> |
assertEquals(-1,ai.get()); |
165 |
|
} |
166 |
|
|
167 |
|
/** |
168 |
|
* decrementAndGet decrements and returns current value |
169 |
|
*/ |
170 |
< |
public void testDecrementAndGet(){ |
170 |
> |
public void testDecrementAndGet() { |
171 |
|
AtomicInteger ai = new AtomicInteger(1); |
172 |
< |
assertEquals(0,ai.decrementAndGet()); |
173 |
< |
assertEquals(-1,ai.decrementAndGet()); |
174 |
< |
assertEquals(-2,ai.decrementAndGet()); |
175 |
< |
assertEquals(-2,ai.get()); |
172 |
> |
assertEquals(0,ai.decrementAndGet()); |
173 |
> |
assertEquals(-1,ai.decrementAndGet()); |
174 |
> |
assertEquals(-2,ai.decrementAndGet()); |
175 |
> |
assertEquals(-2,ai.get()); |
176 |
|
} |
177 |
|
|
178 |
|
/** |
179 |
|
* incrementAndGet increments and returns current value |
180 |
|
*/ |
181 |
< |
public void testIncrementAndGet(){ |
181 |
> |
public void testIncrementAndGet() { |
182 |
|
AtomicInteger ai = new AtomicInteger(1); |
183 |
< |
assertEquals(2,ai.incrementAndGet()); |
184 |
< |
assertEquals(2,ai.get()); |
185 |
< |
ai.set(-2); |
186 |
< |
assertEquals(-1,ai.incrementAndGet()); |
187 |
< |
assertEquals(0,ai.incrementAndGet()); |
188 |
< |
assertEquals(1,ai.incrementAndGet()); |
189 |
< |
assertEquals(1,ai.get()); |
183 |
> |
assertEquals(2,ai.incrementAndGet()); |
184 |
> |
assertEquals(2,ai.get()); |
185 |
> |
ai.set(-2); |
186 |
> |
assertEquals(-1,ai.incrementAndGet()); |
187 |
> |
assertEquals(0,ai.incrementAndGet()); |
188 |
> |
assertEquals(1,ai.incrementAndGet()); |
189 |
> |
assertEquals(1,ai.get()); |
190 |
|
} |
191 |
|
|
192 |
|
/** |
193 |
|
* a deserialized serialized atomic holds same value |
194 |
|
*/ |
195 |
< |
public void testSerialization() { |
195 |
> |
public void testSerialization() throws Exception { |
196 |
|
AtomicInteger l = new AtomicInteger(); |
197 |
|
|
198 |
< |
try { |
199 |
< |
l.set(22); |
200 |
< |
ByteArrayOutputStream bout = new ByteArrayOutputStream(10000); |
201 |
< |
ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout)); |
202 |
< |
out.writeObject(l); |
203 |
< |
out.close(); |
204 |
< |
|
205 |
< |
ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray()); |
206 |
< |
ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin)); |
207 |
< |
AtomicInteger r = (AtomicInteger) in.readObject(); |
208 |
< |
assertEquals(l.get(), r.get()); |
209 |
< |
} catch(Exception e){ |
210 |
< |
unexpectedException(); |
198 |
> |
l.set(22); |
199 |
> |
ByteArrayOutputStream bout = new ByteArrayOutputStream(10000); |
200 |
> |
ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout)); |
201 |
> |
out.writeObject(l); |
202 |
> |
out.close(); |
203 |
> |
|
204 |
> |
ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray()); |
205 |
> |
ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin)); |
206 |
> |
AtomicInteger r = (AtomicInteger) in.readObject(); |
207 |
> |
assertEquals(l.get(), r.get()); |
208 |
> |
} |
209 |
> |
|
210 |
> |
/** |
211 |
> |
* toString returns current value. |
212 |
> |
*/ |
213 |
> |
public void testToString() { |
214 |
> |
AtomicInteger ai = new AtomicInteger(); |
215 |
> |
assertEquals("0", ai.toString()); |
216 |
> |
for (int x : VALUES) { |
217 |
> |
ai.set(x); |
218 |
> |
assertEquals(ai.toString(), Integer.toString(x)); |
219 |
> |
} |
220 |
> |
} |
221 |
> |
|
222 |
> |
/** |
223 |
> |
* intValue returns current value. |
224 |
> |
*/ |
225 |
> |
public void testIntValue() { |
226 |
> |
AtomicInteger ai = new AtomicInteger(); |
227 |
> |
assertEquals(0, ai.intValue()); |
228 |
> |
for (int x : VALUES) { |
229 |
> |
ai.set(x); |
230 |
> |
assertEquals(x, ai.intValue()); |
231 |
> |
} |
232 |
> |
} |
233 |
> |
|
234 |
> |
/** |
235 |
> |
* longValue returns current value. |
236 |
> |
*/ |
237 |
> |
public void testLongValue() { |
238 |
> |
AtomicInteger ai = new AtomicInteger(); |
239 |
> |
assertEquals(0L, ai.longValue()); |
240 |
> |
for (int x : VALUES) { |
241 |
> |
ai.set(x); |
242 |
> |
assertEquals((long)x, ai.longValue()); |
243 |
|
} |
244 |
|
} |
245 |
|
|
246 |
+ |
/** |
247 |
+ |
* floatValue returns current value. |
248 |
+ |
*/ |
249 |
+ |
public void testFloatValue() { |
250 |
+ |
AtomicInteger ai = new AtomicInteger(); |
251 |
+ |
assertEquals(0.0f, ai.floatValue()); |
252 |
+ |
for (int x : VALUES) { |
253 |
+ |
ai.set(x); |
254 |
+ |
assertEquals((float)x, ai.floatValue()); |
255 |
+ |
} |
256 |
+ |
} |
257 |
+ |
|
258 |
+ |
/** |
259 |
+ |
* doubleValue returns current value. |
260 |
+ |
*/ |
261 |
+ |
public void testDoubleValue() { |
262 |
+ |
AtomicInteger ai = new AtomicInteger(); |
263 |
+ |
assertEquals(0.0d, ai.doubleValue()); |
264 |
+ |
for (int x : VALUES) { |
265 |
+ |
ai.set(x); |
266 |
+ |
assertEquals((double)x, ai.doubleValue()); |
267 |
+ |
} |
268 |
+ |
} |
269 |
|
|
270 |
|
} |