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Comparing jsr166/src/test/tck/AtomicIntegerTest.java (file contents):
Revision 1.5 by dl, Thu Sep 25 11:02:41 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	+	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(){
29	>	public void testConstructor() {
30		AtomicInteger ai = new AtomicInteger(1);
31	<	assertEquals(1,ai.get());
31	>	assertEquals(1, ai.get());
32		}
33
34		/**
35	<	* default constructed intializes to zero
35	>	* default constructed initializes to zero
36		*/
37	<	public void testConstructor2(){
37	>	public void testConstructor2() {
38		AtomicInteger ai = new AtomicInteger();
39	<	assertEquals(0,ai.get());
39	>	assertEquals(0, ai.get());
40		}
41
42		/**
43		* get returns the last value set
44		*/
45	<	public void testGetSet(){
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());
46	<
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(){
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	<	assertFalse((7 == ai.get()));
76	<	assertTrue(ai.compareAndSet(-4,7));
77	<	assertEquals(7,ai.get());
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() {
84	>	public void testCompareAndSetInMultipleThreads() throws Exception {
85		final AtomicInteger ai = new AtomicInteger(1);
86	<	Thread t = new Thread(new Runnable() {
87	<	public void run() {
88	<	while(!ai.compareAndSet(2, 3)) Thread.yield();
89	<	}});
90	<	try {
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	<	}
79	<	catch(Exception e) {
80	<	unexpectedException();
81	<	}
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
101	>	* to expected
102		*/
103	<	public void testWeakCompareAndSet(){
103	>	public void testWeakCompareAndSet() {
104		AtomicInteger ai = new AtomicInteger(1);
105	<	while(!ai.weakCompareAndSet(1,2));
106	<	while(!ai.weakCompareAndSet(2,-4));
107	<	assertEquals(-4,ai.get());
108	<	while(!ai.weakCompareAndSet(-4,7));
109	<	assertEquals(7,ai.get());
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(){
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));
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(){
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());
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(){
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());
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(){
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());
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(){
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());
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(){
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());
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(){
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());
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() {
197	<	AtomicInteger l = new AtomicInteger();
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	<	try {
208	<	l.set(22);
209	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
210	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
211	<	out.writeObject(l);
212	<	out.close();
213	<
214	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
215	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
216	<	AtomicInteger r = (AtomicInteger) in.readObject();
217	<	assertEquals(l.get(), r.get());
218	<	} catch(Exception e){
219	<	unexpectedException();
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	>	/**
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	+	/**
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	+	/**
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	+	/**
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	+	// jdk9
268	+
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
425		}

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