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Comparing jsr166/src/test/tck/AtomicLongFieldUpdaterTest.java (file contents):
Revision 1.1 by dl, Sun Aug 31 19:24:53 2003 UTC vs.
Revision 1.17 by jsr166, Tue Dec 1 09:56:28 2009 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/licenses/publicdomain
5	>	* Other contributors include Andrew Wright, Jeffrey Hayes,
6	>	* Pat Fisher, Mike Judd.
7		*/
8
9		import java.util.concurrent.atomic.*;
10		import junit.framework.*;
11		import java.util.*;
12
13	<	public class AtomicLongFieldUpdaterTest extends TestCase{
13	>	public class AtomicLongFieldUpdaterTest extends JSR166TestCase {
14		volatile long x = 0;
15	<	long z;
16	<	int w;
15	>	int z;
16	>	long w;
17
18	<	public static void main(String[] args){
18	>	public static void main(String[] args) {
19		junit.textui.TestRunner.run(suite());
20		}
20	–
21	–
21		public static Test suite() {
22		return new TestSuite(AtomicLongFieldUpdaterTest.class);
23		}
24
25	<	public void testConstructor(){
26	<	try{
27	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>
25	>	/**
26	>	* Construction with non-existent field throws RuntimeException
27	>	*/
28	>	public void testConstructor() {
29	>	try {
30	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>
31		a = AtomicLongFieldUpdater.newUpdater
32	<	(getClass(), "y");
33	<	fail("Exception not thrown");
34	<	}
33	<
34	<	catch (RuntimeException rt) {}
32	>	(AtomicLongFieldUpdaterTest.class, "y");
33	>	shouldThrow();
34	>	} catch (RuntimeException success) {}
35		}
36
37	<	public void testConstructor2(){
38	<	try{
39	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>
37	>	/**
38	>	* construction with field not of given type throws RuntimeException
39	>	*/
40	>	public void testConstructor2() {
41	>	try {
42	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>
43		a = AtomicLongFieldUpdater.newUpdater
44	<	(getClass(), "z");
45	<	fail("Exception not thrown");
46	<	}
44	<
45	<	catch (RuntimeException rt) {}
44	>	(AtomicLongFieldUpdaterTest.class, "z");
45	>	shouldThrow();
46	>	} catch (RuntimeException success) {}
47		}
48
49	<	public void testConstructor3(){
50	<	try{
51	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>
49	>	/**
50	>	* construction with non-volatile field throws RuntimeException
51	>	*/
52	>	public void testConstructor3() {
53	>	try {
54	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>
55		a = AtomicLongFieldUpdater.newUpdater
56	<	(getClass(), "w");
57	<	fail("Exception not thrown");
58	<	}
55	<
56	<	catch (RuntimeException rt) {}
56	>	(AtomicLongFieldUpdaterTest.class, "w");
57	>	shouldThrow();
58	>	} catch (RuntimeException success) {}
59		}
60
61	<	public void testGetSet(){
62	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
61	>	/**
62	>	*  get returns the last value set or assigned
63	>	*/
64	>	public void testGetSet() {
65	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
66	>	try {
67	>	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
68	>	} catch (RuntimeException ok) {
69	>	return;
70	>	}
71		x = 1;
72	<	assertEquals(1,a.get(this));
73	<	a.set(this,2);
74	<	assertEquals(2,a.get(this));
75	<	a.set(this,-3);
76	<	assertEquals(-3,a.get(this));
77	<
78	<	}
79	<	public void testCompareAndSet(){
80	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
72	>	assertEquals(1,a.get(this));
73	>	a.set(this,2);
74	>	assertEquals(2,a.get(this));
75	>	a.set(this,-3);
76	>	assertEquals(-3,a.get(this));
77	>	}
78	>
79	>	/**
80	>	*  get returns the last value lazySet by same thread
81	>	*/
82	>	public void testGetLazySet() {
83	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
84	>	try {
85	>	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
86	>	} catch (RuntimeException ok) {
87	>	return;
88	>	}
89		x = 1;
90	<	assertTrue(a.compareAndSet(this,1,2));
91	<	assertTrue(a.compareAndSet(this,2,-4));
92	<	assertEquals(-4,a.get(this));
93	<	assertFalse(a.compareAndSet(this,-5,7));
94	<	assertFalse((7 == a.get(this)));
77	<	assertTrue(a.compareAndSet(this,-4,7));
78	<	assertEquals(7,a.get(this));
90	>	assertEquals(1,a.get(this));
91	>	a.lazySet(this,2);
92	>	assertEquals(2,a.get(this));
93	>	a.lazySet(this,-3);
94	>	assertEquals(-3,a.get(this));
95		}
96
97	<	public void testWeakCompareAndSet(){
98	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
97	>
98	>	/**
99	>	* compareAndSet succeeds in changing value if equal to expected else fails
100	>	*/
101	>	public void testCompareAndSet() {
102	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
103	>	try {
104	>	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
105	>	} catch (RuntimeException ok) {
106	>	return;
107	>	}
108		x = 1;
109	<	while(!a.weakCompareAndSet(this,1,2));
110	<	while(!a.weakCompareAndSet(this,2,-4));
111	<	assertEquals(-4,a.get(this));
112	<	while(!a.weakCompareAndSet(this,-4,7));
113	<	assertEquals(7,a.get(this));
109	>	assertTrue(a.compareAndSet(this,1,2));
110	>	assertTrue(a.compareAndSet(this,2,-4));
111	>	assertEquals(-4,a.get(this));
112	>	assertFalse(a.compareAndSet(this,-5,7));
113	>	assertEquals(-4,a.get(this));
114	>	assertTrue(a.compareAndSet(this,-4,7));
115	>	assertEquals(7,a.get(this));
116		}
117
118	<	public void testGetAndSet(){
119	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
118	>
119	>	/**
120	>	* compareAndSet in one thread enables another waiting for value
121	>	* to succeed
122	>	*/
123	>	public void testCompareAndSetInMultipleThreads() throws Exception {
124		x = 1;
125	<	assertEquals(1,a.getAndSet(this, 0));
126	<	assertEquals(0,a.getAndSet(this,-10));
127	<	assertEquals(-10,a.getAndSet(this,1));
128	<	}
125	>	final AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>a;
126	>	try {
127	>	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
128	>	} catch (RuntimeException ok) {
129	>	return;
130	>	}
131
132	<	public void testGetAndAdd(){
133	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
132	>	Thread t = new Thread(new CheckedRunnable() {
133	>	public void realRun() {
134	>	while (!a.compareAndSet(AtomicLongFieldUpdaterTest.this, 2, 3))
135	>	Thread.yield();
136	>	}});
137	>
138	>	t.start();
139	>	assertTrue(a.compareAndSet(this, 1, 2));
140	>	t.join(LONG_DELAY_MS);
141	>	assertFalse(t.isAlive());
142	>	assertEquals(a.get(this), 3);
143	>	}
144	>
145	>	/**
146	>	* repeated weakCompareAndSet succeeds in changing value when equal
147	>	* to expected
148	>	*/
149	>	public void testWeakCompareAndSet() {
150	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
151	>	try {
152	>	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
153	>	} catch (RuntimeException ok) {
154	>	return;
155	>	}
156		x = 1;
157	<	assertEquals(1,a.getAndAdd(this,2));
158	<	assertEquals(3,a.get(this));
159	<	assertEquals(3,a.getAndAdd(this,-4));
160	<	assertEquals(-1,a.get(this));
157	>	while (!a.weakCompareAndSet(this,1,2));
158	>	while (!a.weakCompareAndSet(this,2,-4));
159	>	assertEquals(-4,a.get(this));
160	>	while (!a.weakCompareAndSet(this,-4,7));
161	>	assertEquals(7,a.get(this));
162	>	}
163	>
164	>	/**
165	>	*  getAndSet returns previous value and sets to given value
166	>	*/
167	>	public void testGetAndSet() {
168	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
169	>	try {
170	>	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
171	>	} catch (RuntimeException ok) {
172	>	return;
173	>	}
174	>	x = 1;
175	>	assertEquals(1,a.getAndSet(this, 0));
176	>	assertEquals(0,a.getAndSet(this,-10));
177	>	assertEquals(-10,a.getAndSet(this,1));
178		}
179
180	<	public void testGetAndDecrement(){
181	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
180	>	/**
181	>	* getAndAdd returns previous value and adds given value
182	>	*/
183	>	public void testGetAndAdd() {
184	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
185	>	try {
186	>	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
187	>	} catch (RuntimeException ok) {
188	>	return;
189	>	}
190		x = 1;
191	<	assertEquals(1,a.getAndDecrement(this));
192	<	assertEquals(0,a.getAndDecrement(this));
193	<	assertEquals(-1,a.getAndDecrement(this));
191	>	assertEquals(1,a.getAndAdd(this,2));
192	>	assertEquals(3,a.get(this));
193	>	assertEquals(3,a.getAndAdd(this,-4));
194	>	assertEquals(-1,a.get(this));
195		}
196
197	<	public void testGetAndIncrement(){
198	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
197	>	/**
198	>	* getAndDecrement returns previous value and decrements
199	>	*/
200	>	public void testGetAndDecrement() {
201	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
202	>	try {
203	>	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
204	>	} catch (RuntimeException ok) {
205	>	return;
206	>	}
207		x = 1;
208	<	assertEquals(1,a.getAndIncrement(this));
209	<	assertEquals(2,a.get(this));
210	<	a.set(this,-2);
122	<	assertEquals(-2,a.getAndIncrement(this));
123	<	assertEquals(-1,a.getAndIncrement(this));
124	<	assertEquals(0,a.getAndIncrement(this));
125	<	assertEquals(1,a.get(this));
208	>	assertEquals(1,a.getAndDecrement(this));
209	>	assertEquals(0,a.getAndDecrement(this));
210	>	assertEquals(-1,a.getAndDecrement(this));
211		}
212
213	<	public void testAddAndGet(){
214	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
213	>	/**
214	>	* getAndIncrement returns previous value and increments
215	>	*/
216	>	public void testGetAndIncrement() {
217	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
218	>	try {
219	>	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
220	>	} catch (RuntimeException ok) {
221	>	return;
222	>	}
223	>	x = 1;
224	>	assertEquals(1,a.getAndIncrement(this));
225	>	assertEquals(2,a.get(this));
226	>	a.set(this,-2);
227	>	assertEquals(-2,a.getAndIncrement(this));
228	>	assertEquals(-1,a.getAndIncrement(this));
229	>	assertEquals(0,a.getAndIncrement(this));
230	>	assertEquals(1,a.get(this));
231	>	}
232	>
233	>	/**
234	>	* addAndGet adds given value to current, and returns current value
235	>	*/
236	>	public void testAddAndGet() {
237	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
238	>	try {
239	>	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
240	>	} catch (RuntimeException ok) {
241	>	return;
242	>	}
243		x = 1;
244	<	assertEquals(3,a.addAndGet(this,2));
245	<	assertEquals(3,a.get(this));
246	<	assertEquals(-1,a.addAndGet(this,-4));
247	<	assertEquals(-1,a.get(this));
244	>	assertEquals(3,a.addAndGet(this,2));
245	>	assertEquals(3,a.get(this));
246	>	assertEquals(-1,a.addAndGet(this,-4));
247	>	assertEquals(-1,a.get(this));
248		}
249
250	<	public void testDecrementAndGet(){
251	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
250	>	/**
251	>	*  decrementAndGet decrements and returns current value
252	>	*/
253	>	public void testDecrementAndGet() {
254	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
255	>	try {
256	>	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
257	>	} catch (RuntimeException ok) {
258	>	return;
259	>	}
260		x = 1;
261	<	assertEquals(0,a.decrementAndGet(this));
262	<	assertEquals(-1,a.decrementAndGet(this));
263	<	assertEquals(-2,a.decrementAndGet(this));
264	<	assertEquals(-2,a.get(this));
261	>	assertEquals(0,a.decrementAndGet(this));
262	>	assertEquals(-1,a.decrementAndGet(this));
263	>	assertEquals(-2,a.decrementAndGet(this));
264	>	assertEquals(-2,a.get(this));
265		}
266
267	<	public void testIncrementAndGet(){
268	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
267	>	/**
268	>	* incrementAndGet increments and returns current value
269	>	*/
270	>	public void testIncrementAndGet() {
271	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
272	>	try {
273	>	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
274	>	} catch (RuntimeException ok) {
275	>	return;
276	>	}
277		x = 1;
278	<	assertEquals(2,a.incrementAndGet(this));
279	<	assertEquals(2,a.get(this));
280	<	a.set(this,-2);
281	<	assertEquals(-1,a.incrementAndGet(this));
282	<	assertEquals(0,a.incrementAndGet(this));
283	<	assertEquals(1,a.incrementAndGet(this));
284	<	assertEquals(1,a.get(this));
278	>	assertEquals(2,a.incrementAndGet(this));
279	>	assertEquals(2,a.get(this));
280	>	a.set(this,-2);
281	>	assertEquals(-1,a.incrementAndGet(this));
282	>	assertEquals(0,a.incrementAndGet(this));
283	>	assertEquals(1,a.incrementAndGet(this));
284	>	assertEquals(1,a.get(this));
285		}
286
287		}

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