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Comparing jsr166/src/test/tck/AtomicIntegerTest.java (file contents):
Revision 1.3 by dl, Sun Sep 14 20:42:40 2003 UTC vs.
Revision 1.30 by jsr166, Fri Jun 17 01:38:28 2016 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/publicdomain/zero/1.0/
5	>	* Other contributors include Andrew Wright, Jeffrey Hayes,
6	>	* Pat Fisher, Mike Judd.
7		*/
8
9	<	import junit.framework.*;
10	<	import java.util.concurrent.atomic.*;
11	<	import java.io.*;
9	>	import java.util.concurrent.atomic.AtomicInteger;
10	>
11	>	import junit.framework.Test;
12	>	import junit.framework.TestSuite;
13
14		public class AtomicIntegerTest extends JSR166TestCase {
15	<	public static void main (String[] args) {
16	<	junit.textui.TestRunner.run (suite());
15	>	public static void main(String[] args) {
16	>	main(suite(), args);
17		}
18		public static Test suite() {
19		return new TestSuite(AtomicIntegerTest.class);
20		}
21
22	<	public void testConstructor(){
23	<	AtomicInteger ai = new AtomicInteger(1);
24	<	assertEquals(1,ai.get());
25	<	}
26	<
27	<	public void testConstructor2(){
22	>	final int[] VALUES = {
23	>	Integer.MIN_VALUE, -1, 0, 1, 42, Integer.MAX_VALUE,
24	>	};
25	>
26	>	/**
27	>	* constructor initializes to given value
28	>	*/
29	>	public void testConstructor() {
30	>	AtomicInteger ai = new AtomicInteger(1);
31	>	assertEquals(1, ai.get());
32	>	}
33	>
34	>	/**
35	>	* default constructed initializes to zero
36	>	*/
37	>	public void testConstructor2() {
38		AtomicInteger ai = new AtomicInteger();
39	<	assertEquals(0,ai.get());
28	<	}
29	<
30	<	public void testGetSet(){
31	<	AtomicInteger ai = new AtomicInteger(1);
32	<	assertEquals(1,ai.get());
33	<	ai.set(2);
34	<	assertEquals(2,ai.get());
35	<	ai.set(-3);
36	<	assertEquals(-3,ai.get());
37	<
38	<	}
39	<	public void testCompareAndSet(){
40	<	AtomicInteger ai = new AtomicInteger(1);
41	<	assertTrue(ai.compareAndSet(1,2));
42	<	assertTrue(ai.compareAndSet(2,-4));
43	<	assertEquals(-4,ai.get());
44	<	assertFalse(ai.compareAndSet(-5,7));
45	<	assertFalse((7 == ai.get()));
46	<	assertTrue(ai.compareAndSet(-4,7));
47	<	assertEquals(7,ai.get());
48	<	}
49	<
50	<	public void testWeakCompareAndSet(){
51	<	AtomicInteger ai = new AtomicInteger(1);
52	<	while(!ai.weakCompareAndSet(1,2));
53	<	while(!ai.weakCompareAndSet(2,-4));
54	<	assertEquals(-4,ai.get());
55	<	while(!ai.weakCompareAndSet(-4,7));
56	<	assertEquals(7,ai.get());
57	<	}
58	<
59	<	public void testGetAndSet(){
60	<	AtomicInteger ai = new AtomicInteger(1);
61	<	assertEquals(1,ai.getAndSet(0));
62	<	assertEquals(0,ai.getAndSet(-10));
63	<	assertEquals(-10,ai.getAndSet(1));
64	<	}
65	<
66	<	public void testGetAndAdd(){
67	<	AtomicInteger ai = new AtomicInteger(1);
68	<	assertEquals(1,ai.getAndAdd(2));
69	<	assertEquals(3,ai.get());
70	<	assertEquals(3,ai.getAndAdd(-4));
71	<	assertEquals(-1,ai.get());
39	>	assertEquals(0, ai.get());
40		}
41
42	<	public void testGetAndDecrement(){
43	<	AtomicInteger ai = new AtomicInteger(1);
44	<	assertEquals(1,ai.getAndDecrement());
45	<	assertEquals(0,ai.getAndDecrement());
46	<	assertEquals(-1,ai.getAndDecrement());
42	>	/**
43	>	* get returns the last value set
44	>	*/
45	>	public void testGetSet() {
46	>	AtomicInteger ai = new AtomicInteger(1);
47	>	assertEquals(1, ai.get());
48	>	ai.set(2);
49	>	assertEquals(2, ai.get());
50	>	ai.set(-3);
51	>	assertEquals(-3, ai.get());
52	>	}
53	>
54	>	/**
55	>	* get returns the last value lazySet in same thread
56	>	*/
57	>	public void testGetLazySet() {
58	>	AtomicInteger ai = new AtomicInteger(1);
59	>	assertEquals(1, ai.get());
60	>	ai.lazySet(2);
61	>	assertEquals(2, ai.get());
62	>	ai.lazySet(-3);
63	>	assertEquals(-3, ai.get());
64	>	}
65	>
66	>	/**
67	>	* compareAndSet succeeds in changing value if equal to expected else fails
68	>	*/
69	>	public void testCompareAndSet() {
70	>	AtomicInteger ai = new AtomicInteger(1);
71	>	assertTrue(ai.compareAndSet(1, 2));
72	>	assertTrue(ai.compareAndSet(2, -4));
73	>	assertEquals(-4, ai.get());
74	>	assertFalse(ai.compareAndSet(-5, 7));
75	>	assertEquals(-4, ai.get());
76	>	assertTrue(ai.compareAndSet(-4, 7));
77	>	assertEquals(7, ai.get());
78	>	}
79	>
80	>	/**
81	>	* compareAndSet in one thread enables another waiting for value
82	>	* to succeed
83	>	*/
84	>	public void testCompareAndSetInMultipleThreads() throws Exception {
85	>	final AtomicInteger ai = new AtomicInteger(1);
86	>	Thread t = new Thread(new CheckedRunnable() {
87	>	public void realRun() {
88	>	while (!ai.compareAndSet(2, 3))
89	>	Thread.yield();
90	>	}});
91	>
92	>	t.start();
93	>	assertTrue(ai.compareAndSet(1, 2));
94	>	t.join(LONG_DELAY_MS);
95	>	assertFalse(t.isAlive());
96	>	assertEquals(3, ai.get());
97	>	}
98	>
99	>	/**
100	>	* repeated weakCompareAndSet succeeds in changing value when equal
101	>	* to expected
102	>	*/
103	>	public void testWeakCompareAndSet() {
104	>	AtomicInteger ai = new AtomicInteger(1);
105	>	do {} while (!ai.weakCompareAndSet(1, 2));
106	>	do {} while (!ai.weakCompareAndSet(2, -4));
107	>	assertEquals(-4, ai.get());
108	>	do {} while (!ai.weakCompareAndSet(-4, 7));
109	>	assertEquals(7, ai.get());
110	>	}
111	>
112	>	/**
113	>	* getAndSet returns previous value and sets to given value
114	>	*/
115	>	public void testGetAndSet() {
116	>	AtomicInteger ai = new AtomicInteger(1);
117	>	assertEquals(1, ai.getAndSet(0));
118	>	assertEquals(0, ai.getAndSet(-10));
119	>	assertEquals(-10, ai.getAndSet(1));
120	>	}
121	>
122	>	/**
123	>	* getAndAdd returns previous value and adds given value
124	>	*/
125	>	public void testGetAndAdd() {
126	>	AtomicInteger ai = new AtomicInteger(1);
127	>	assertEquals(1, ai.getAndAdd(2));
128	>	assertEquals(3, ai.get());
129	>	assertEquals(3, ai.getAndAdd(-4));
130	>	assertEquals(-1, ai.get());
131	>	}
132	>
133	>	/**
134	>	* getAndDecrement returns previous value and decrements
135	>	*/
136	>	public void testGetAndDecrement() {
137	>	AtomicInteger ai = new AtomicInteger(1);
138	>	assertEquals(1, ai.getAndDecrement());
139	>	assertEquals(0, ai.getAndDecrement());
140	>	assertEquals(-1, ai.getAndDecrement());
141	>	}
142	>
143	>	/**
144	>	* getAndIncrement returns previous value and increments
145	>	*/
146	>	public void testGetAndIncrement() {
147	>	AtomicInteger ai = new AtomicInteger(1);
148	>	assertEquals(1, ai.getAndIncrement());
149	>	assertEquals(2, ai.get());
150	>	ai.set(-2);
151	>	assertEquals(-2, ai.getAndIncrement());
152	>	assertEquals(-1, ai.getAndIncrement());
153	>	assertEquals(0, ai.getAndIncrement());
154	>	assertEquals(1, ai.get());
155	>	}
156	>
157	>	/**
158	>	* addAndGet adds given value to current, and returns current value
159	>	*/
160	>	public void testAddAndGet() {
161	>	AtomicInteger ai = new AtomicInteger(1);
162	>	assertEquals(3, ai.addAndGet(2));
163	>	assertEquals(3, ai.get());
164	>	assertEquals(-1, ai.addAndGet(-4));
165	>	assertEquals(-1, ai.get());
166	>	}
167	>
168	>	/**
169	>	* decrementAndGet decrements and returns current value
170	>	*/
171	>	public void testDecrementAndGet() {
172	>	AtomicInteger ai = new AtomicInteger(1);
173	>	assertEquals(0, ai.decrementAndGet());
174	>	assertEquals(-1, ai.decrementAndGet());
175	>	assertEquals(-2, ai.decrementAndGet());
176	>	assertEquals(-2, ai.get());
177	>	}
178	>
179	>	/**
180	>	* incrementAndGet increments and returns current value
181	>	*/
182	>	public void testIncrementAndGet() {
183	>	AtomicInteger ai = new AtomicInteger(1);
184	>	assertEquals(2, ai.incrementAndGet());
185	>	assertEquals(2, ai.get());
186	>	ai.set(-2);
187	>	assertEquals(-1, ai.incrementAndGet());
188	>	assertEquals(0, ai.incrementAndGet());
189	>	assertEquals(1, ai.incrementAndGet());
190	>	assertEquals(1, ai.get());
191	>	}
192	>
193	>	/**
194	>	* a deserialized serialized atomic holds same value
195	>	*/
196	>	public void testSerialization() throws Exception {
197	>	AtomicInteger x = new AtomicInteger();
198	>	AtomicInteger y = serialClone(x);
199	>	assertNotSame(x, y);
200	>	x.set(22);
201	>	AtomicInteger z = serialClone(x);
202	>	assertEquals(22, x.get());
203	>	assertEquals(0, y.get());
204	>	assertEquals(22, z.get());
205	>	}
206	>
207	>	/**
208	>	* toString returns current value.
209	>	*/
210	>	public void testToString() {
211	>	AtomicInteger ai = new AtomicInteger();
212	>	assertEquals("0", ai.toString());
213	>	for (int x : VALUES) {
214	>	ai.set(x);
215	>	assertEquals(Integer.toString(x), ai.toString());
216	>	}
217		}
218
219	<	public void testGetAndIncrement(){
220	<	AtomicInteger ai = new AtomicInteger(1);
221	<	assertEquals(1,ai.getAndIncrement());
222	<	assertEquals(2,ai.get());
223	<	ai.set(-2);
224	<	assertEquals(-2,ai.getAndIncrement());
225	<	assertEquals(-1,ai.getAndIncrement());
226	<	assertEquals(0,ai.getAndIncrement());
227	<	assertEquals(1,ai.get());
219	>	/**
220	>	* intValue returns current value.
221	>	*/
222	>	public void testIntValue() {
223	>	AtomicInteger ai = new AtomicInteger();
224	>	assertEquals(0, ai.intValue());
225	>	for (int x : VALUES) {
226	>	ai.set(x);
227	>	assertEquals(x, ai.intValue());
228	>	}
229		}
230
231	<	public void testAddAndGet(){
232	<	AtomicInteger ai = new AtomicInteger(1);
233	<	assertEquals(3,ai.addAndGet(2));
234	<	assertEquals(3,ai.get());
235	<	assertEquals(-1,ai.addAndGet(-4));
236	<	assertEquals(-1,ai.get());
231	>	/**
232	>	* longValue returns current value.
233	>	*/
234	>	public void testLongValue() {
235	>	AtomicInteger ai = new AtomicInteger();
236	>	assertEquals(0L, ai.longValue());
237	>	for (int x : VALUES) {
238	>	ai.set(x);
239	>	assertEquals((long)x, ai.longValue());
240	>	}
241		}
242
243	<	public void testDecrementAndGet(){
244	<	AtomicInteger ai = new AtomicInteger(1);
245	<	assertEquals(0,ai.decrementAndGet());
246	<	assertEquals(-1,ai.decrementAndGet());
247	<	assertEquals(-2,ai.decrementAndGet());
248	<	assertEquals(-2,ai.get());
243	>	/**
244	>	* floatValue returns current value.
245	>	*/
246	>	public void testFloatValue() {
247	>	AtomicInteger ai = new AtomicInteger();
248	>	assertEquals(0.0f, ai.floatValue());
249	>	for (int x : VALUES) {
250	>	ai.set(x);
251	>	assertEquals((float)x, ai.floatValue());
252	>	}
253		}
254
255	<	public void testIncrementAndGet(){
256	<	AtomicInteger ai = new AtomicInteger(1);
257	<	assertEquals(2,ai.incrementAndGet());
258	<	assertEquals(2,ai.get());
259	<	ai.set(-2);
260	<	assertEquals(-1,ai.incrementAndGet());
261	<	assertEquals(0,ai.incrementAndGet());
262	<	assertEquals(1,ai.incrementAndGet());
263	<	assertEquals(1,ai.get());
255	>	/**
256	>	* doubleValue returns current value.
257	>	*/
258	>	public void testDoubleValue() {
259	>	AtomicInteger ai = new AtomicInteger();
260	>	assertEquals(0.0d, ai.doubleValue());
261	>	for (int x : VALUES) {
262	>	ai.set(x);
263	>	assertEquals((double)x, ai.doubleValue());
264	>	}
265		}
266
267	<	public void testSerialization() {
120	<	AtomicInteger l = new AtomicInteger();
121	<
122	<	try {
123	<	l.set(22);
124	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
125	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
126	<	out.writeObject(l);
127	<	out.close();
267	>	// jdk9
268
269	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
270	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
271	<	AtomicInteger r = (AtomicInteger) in.readObject();
272	<	assertEquals(l.get(), r.get());
273	<	} catch(Exception e){
274	<	e.printStackTrace();
275	<	fail("unexpected exception");
276	<	}
269	>	/**
270	>	* getPlain returns the last value set
271	>	*/
272	>	public void testGetPlainSet() {
273	>	AtomicInteger ai = new AtomicInteger(1);
274	>	assertEquals(1, ai.getPlain());
275	>	ai.set(2);
276	>	assertEquals(2, ai.getPlain());
277	>	ai.set(-3);
278	>	assertEquals(-3, ai.getPlain());
279	>	}
280	>
281	>	/**
282	>	* getOpaque returns the last value set
283	>	*/
284	>	public void testGetOpaqueSet() {
285	>	AtomicInteger ai = new AtomicInteger(1);
286	>	assertEquals(1, ai.getOpaque());
287	>	ai.set(2);
288	>	assertEquals(2, ai.getOpaque());
289	>	ai.set(-3);
290	>	assertEquals(-3, ai.getOpaque());
291	>	}
292	>
293	>	/**
294	>	* getAcquire returns the last value set
295	>	*/
296	>	public void testGetAcquireSet() {
297	>	AtomicInteger ai = new AtomicInteger(1);
298	>	assertEquals(1, ai.getAcquire());
299	>	ai.set(2);
300	>	assertEquals(2, ai.getAcquire());
301	>	ai.set(-3);
302	>	assertEquals(-3, ai.getAcquire());
303	>	}
304	>
305	>	/**
306	>	* get returns the last value setPlain
307	>	*/
308	>	public void testGetSetPlain() {
309	>	AtomicInteger ai = new AtomicInteger(1);
310	>	assertEquals(1, ai.get());
311	>	ai.setPlain(2);
312	>	assertEquals(2, ai.get());
313	>	ai.setPlain(-3);
314	>	assertEquals(-3, ai.get());
315	>	}
316	>
317	>	/**
318	>	* get returns the last value setOpaque
319	>	*/
320	>	public void testGetSetOpaque() {
321	>	AtomicInteger ai = new AtomicInteger(1);
322	>	assertEquals(1, ai.get());
323	>	ai.setOpaque(2);
324	>	assertEquals(2, ai.get());
325	>	ai.setOpaque(-3);
326	>	assertEquals(-3, ai.get());
327	>	}
328	>
329	>	/**
330	>	* get returns the last value setRelease
331	>	*/
332	>	public void testGetSetRelease() {
333	>	AtomicInteger ai = new AtomicInteger(1);
334	>	assertEquals(1, ai.get());
335	>	ai.setRelease(2);
336	>	assertEquals(2, ai.get());
337	>	ai.setRelease(-3);
338	>	assertEquals(-3, ai.get());
339	>	}
340	>
341	>	/**
342	>	* compareAndExchange succeeds in changing value if equal to
343	>	* expected else fails
344	>	*/
345	>	public void testCompareAndExchange() {
346	>	AtomicInteger ai = new AtomicInteger(1);
347	>	assertEquals(1, ai.compareAndExchange(1, 2));
348	>	assertEquals(2, ai.compareAndExchange(2, -4));
349	>	assertEquals(-4, ai.get());
350	>	assertEquals(-4, ai.compareAndExchange(-5, 7));
351	>	assertEquals(-4, ai.get());
352	>	assertEquals(-4, ai.compareAndExchange(-4, 7));
353	>	assertEquals(7, ai.get());
354	>	}
355	>
356	>	/**
357	>	* compareAndExchangeAcquire succeeds in changing value if equal to
358	>	* expected else fails
359	>	*/
360	>	public void testCompareAndExchangeAcquire() {
361	>	AtomicInteger ai = new AtomicInteger(1);
362	>	assertEquals(1, ai.compareAndExchangeAcquire(1, 2));
363	>	assertEquals(2, ai.compareAndExchangeAcquire(2, -4));
364	>	assertEquals(-4, ai.get());
365	>	assertEquals(-4, ai.compareAndExchangeAcquire(-5, 7));
366	>	assertEquals(-4, ai.get());
367	>	assertEquals(-4, ai.compareAndExchangeAcquire(-4, 7));
368	>	assertEquals(7, ai.get());
369	>	}
370	>
371	>	/**
372	>	* compareAndExchangeRelease succeeds in changing value if equal to
373	>	* expected else fails
374	>	*/
375	>	public void testCompareAndExchangeRelease() {
376	>	AtomicInteger ai = new AtomicInteger(1);
377	>	assertEquals(1, ai.compareAndExchangeRelease(1, 2));
378	>	assertEquals(2, ai.compareAndExchangeRelease(2, -4));
379	>	assertEquals(-4, ai.get());
380	>	assertEquals(-4, ai.compareAndExchangeRelease(-5, 7));
381	>	assertEquals(-4, ai.get());
382	>	assertEquals(-4, ai.compareAndExchangeRelease(-4, 7));
383	>	assertEquals(7, ai.get());
384	>	}
385	>
386	>	/**
387	>	* repeated weakCompareAndSetVolatile succeeds in changing value when equal
388	>	* to expected
389	>	*/
390	>	public void testWeakCompareAndSetVolatile() {
391	>	AtomicInteger ai = new AtomicInteger(1);
392	>	do {} while (!ai.weakCompareAndSetVolatile(1, 2));
393	>	do {} while (!ai.weakCompareAndSetVolatile(2, -4));
394	>	assertEquals(-4, ai.get());
395	>	do {} while (!ai.weakCompareAndSetVolatile(-4, 7));
396	>	assertEquals(7, ai.get());
397	>	}
398	>
399	>	/**
400	>	* repeated weakCompareAndSetAcquire succeeds in changing value when equal
401	>	* to expected
402	>	*/
403	>	public void testWeakCompareAndSetAcquire() {
404	>	AtomicInteger ai = new AtomicInteger(1);
405	>	do {} while (!ai.weakCompareAndSetAcquire(1, 2));
406	>	do {} while (!ai.weakCompareAndSetAcquire(2, -4));
407	>	assertEquals(-4, ai.get());
408	>	do {} while (!ai.weakCompareAndSetAcquire(-4, 7));
409	>	assertEquals(7, ai.get());
410	>	}
411	>
412	>	/**
413	>	* repeated weakCompareAndSetRelease succeeds in changing value when equal
414	>	* to expected
415	>	*/
416	>	public void testWeakCompareAndSetRelease() {
417	>	AtomicInteger ai = new AtomicInteger(1);
418	>	do {} while (!ai.weakCompareAndSetRelease(1, 2));
419	>	do {} while (!ai.weakCompareAndSetRelease(2, -4));
420	>	assertEquals(-4, ai.get());
421	>	do {} while (!ai.weakCompareAndSetRelease(-4, 7));
422	>	assertEquals(7, ai.get());
423		}
424
139	–
425		}

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