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Comparing jsr166/src/test/tck/AtomicIntegerFieldUpdaterTest.java (file contents):
Revision 1.1 by dl, Sun Aug 31 19:24:53 2003 UTC vs.
Revision 1.15 by jsr166, Sat Nov 21 02:07:26 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 AtomicIntegerFieldUpdaterTest extends TestCase{
13	>	public class AtomicIntegerFieldUpdaterTest extends JSR166TestCase {
14		volatile int x = 0;
15	<
16	<	public static void main(String[] args){
15	>	int w;
16	>	long z;
17	>	public static void main(String[] args) {
18		junit.textui.TestRunner.run(suite());
19		}
18	–
19	–
20		public static Test suite() {
21		return new TestSuite(AtomicIntegerFieldUpdaterTest.class);
22		}
23
24	<	public void testConstructor(){
25	<	try{
26	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest>
24	>	/**
25	>	* Construction with non-existent field throws RuntimeException
26	>	*/
27	>	public void testConstructor() {
28	>	try {
29	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest>
30		a = AtomicIntegerFieldUpdater.newUpdater
31	<	(getClass(), "y");
32	<	fail("Exception not thrown");
31	>	(AtomicIntegerFieldUpdaterTest.class, "y");
32	>	shouldThrow();
33		}
34		catch (RuntimeException rt) {}
35		}
36
37	<	public void testGetSet(){
38	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
39	<	x = 1;
40	<	assertEquals(1,a.get(this));
41	<	a.set(this,2);
42	<	assertEquals(2,a.get(this));
43	<	a.set(this,-3);
44	<	assertEquals(-3,a.get(this));
45	<
37	>	/**
38	>	* construction with field not of given type throws RuntimeException
39	>	*/
40	>	public void testConstructor2() {
41	>	try {
42	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest>
43	>	a = AtomicIntegerFieldUpdater.newUpdater
44	>	(AtomicIntegerFieldUpdaterTest.class, "z");
45	>	shouldThrow();
46	>	}
47	>	catch (RuntimeException rt) {}
48	>	}
49	>
50	>	/**
51	>	* construction with non-volatile field throws RuntimeException
52	>	*/
53	>	public void testConstructor3() {
54	>	try {
55	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest>
56	>	a = AtomicIntegerFieldUpdater.newUpdater
57	>	(AtomicIntegerFieldUpdaterTest.class, "w");
58	>	shouldThrow();
59	>	}
60	>	catch (RuntimeException rt) {}
61		}
62	<	public void testCompareAndSet(){
63	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
62	>
63	>	/**
64	>	*  get returns the last value set or assigned
65	>	*/
66	>	public void testGetSet() {
67	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
68	>	try {
69	>	a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
70	>	} catch (RuntimeException ok) {
71	>	return;
72	>	}
73		x = 1;
74	<	assertTrue(a.compareAndSet(this,1,2));
75	<	assertTrue(a.compareAndSet(this,2,-4));
76	<	assertEquals(-4,a.get(this));
77	<	assertFalse(a.compareAndSet(this,-5,7));
78	<	assertFalse((7 == a.get(this)));
79	<	assertTrue(a.compareAndSet(this,-4,7));
53	<	assertEquals(7,a.get(this));
74	>	assertEquals(1,a.get(this));
75	>	a.set(this,2);
76	>	assertEquals(2,a.get(this));
77	>	a.set(this,-3);
78	>	assertEquals(-3,a.get(this));
79	>
80		}
81
82	<	public void testWeakCompareAndSet(){
83	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
82	>	/**
83	>	*  get returns the last value lazySet by same thread
84	>	*/
85	>	public void testGetLazySet() {
86	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
87	>	try {
88	>	a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
89	>	} catch (RuntimeException ok) {
90	>	return;
91	>	}
92		x = 1;
93	<	while(!a.weakCompareAndSet(this,1,2));
94	<	while(!a.weakCompareAndSet(this,2,-4));
95	<	assertEquals(-4,a.get(this));
96	<	while(!a.weakCompareAndSet(this,-4,7));
97	<	assertEquals(7,a.get(this));
93	>	assertEquals(1,a.get(this));
94	>	a.lazySet(this,2);
95	>	assertEquals(2,a.get(this));
96	>	a.lazySet(this,-3);
97	>	assertEquals(-3,a.get(this));
98	>
99		}
100
101	<	public void testGetAndSet(){
102	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
101	>	/**
102	>	* compareAndSet succeeds in changing value if equal to expected else fails
103	>	*/
104	>	public void testCompareAndSet() {
105	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
106	>	try {
107	>	a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
108	>	} catch (RuntimeException ok) {
109	>	return;
110	>	}
111		x = 1;
112	<	assertEquals(1,a.getAndSet(this, 0));
113	<	assertEquals(0,a.getAndSet(this,-10));
114	<	assertEquals(-10,a.getAndSet(this,1));
112	>	assertTrue(a.compareAndSet(this,1,2));
113	>	assertTrue(a.compareAndSet(this,2,-4));
114	>	assertEquals(-4,a.get(this));
115	>	assertFalse(a.compareAndSet(this,-5,7));
116	>	assertFalse((7 == a.get(this)));
117	>	assertTrue(a.compareAndSet(this,-4,7));
118	>	assertEquals(7,a.get(this));
119		}
120
121	<	public void testGetAndAdd(){
122	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
121	>
122	>	/**
123	>	* compareAndSet in one thread enables another waiting for value
124	>	* to succeed
125	>	*/
126	>	public void testCompareAndSetInMultipleThreads() throws Exception {
127	>	x = 1;
128	>	final AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest>a;
129	>	try {
130	>	a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
131	>	} catch (RuntimeException ok) {
132	>	return;
133	>	}
134	>
135	>	Thread t = new Thread(new CheckedRunnable() {
136	>	public void realRun() {
137	>	while (!a.compareAndSet(AtomicIntegerFieldUpdaterTest.this, 2, 3))
138	>	Thread.yield();
139	>	}});
140	>
141	>	t.start();
142	>	assertTrue(a.compareAndSet(this, 1, 2));
143	>	t.join(LONG_DELAY_MS);
144	>	assertFalse(t.isAlive());
145	>	assertEquals(a.get(this), 3);
146	>	}
147	>
148	>	/**
149	>	* repeated weakCompareAndSet succeeds in changing value when equal
150	>	* to expected
151	>	*/
152	>	public void testWeakCompareAndSet() {
153	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
154	>	try {
155	>	a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
156	>	} catch (RuntimeException ok) {
157	>	return;
158	>	}
159	>	x = 1;
160	>	while (!a.weakCompareAndSet(this,1,2));
161	>	while (!a.weakCompareAndSet(this,2,-4));
162	>	assertEquals(-4,a.get(this));
163	>	while (!a.weakCompareAndSet(this,-4,7));
164	>	assertEquals(7,a.get(this));
165	>	}
166	>
167	>	/**
168	>	*  getAndSet returns previous value and sets to given value
169	>	*/
170	>	public void testGetAndSet() {
171	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
172	>	try {
173	>	a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
174	>	} catch (RuntimeException ok) {
175	>	return;
176	>	}
177		x = 1;
178	<	assertEquals(1,a.getAndAdd(this,2));
179	<	assertEquals(3,a.get(this));
180	<	assertEquals(3,a.getAndAdd(this,-4));
80	<	assertEquals(-1,a.get(this));
178	>	assertEquals(1,a.getAndSet(this, 0));
179	>	assertEquals(0,a.getAndSet(this,-10));
180	>	assertEquals(-10,a.getAndSet(this,1));
181		}
182
183	<	public void testGetAndDecrement(){
184	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
183	>	/**
184	>	* getAndAdd returns previous value and adds given value
185	>	*/
186	>	public void testGetAndAdd() {
187	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
188	>	try {
189	>	a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
190	>	} catch (RuntimeException ok) {
191	>	return;
192	>	}
193		x = 1;
194	<	assertEquals(1,a.getAndDecrement(this));
195	<	assertEquals(0,a.getAndDecrement(this));
196	<	assertEquals(-1,a.getAndDecrement(this));
194	>	assertEquals(1,a.getAndAdd(this,2));
195	>	assertEquals(3,a.get(this));
196	>	assertEquals(3,a.getAndAdd(this,-4));
197	>	assertEquals(-1,a.get(this));
198		}
199
200	<	public void testGetAndIncrement(){
201	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
200	>	/**
201	>	* getAndDecrement returns previous value and decrements
202	>	*/
203	>	public void testGetAndDecrement() {
204	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
205	>	try {
206	>	a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
207	>	} catch (RuntimeException ok) {
208	>	return;
209	>	}
210		x = 1;
211	<	assertEquals(1,a.getAndIncrement(this));
212	<	assertEquals(2,a.get(this));
213	<	a.set(this,-2);
97	<	assertEquals(-2,a.getAndIncrement(this));
98	<	assertEquals(-1,a.getAndIncrement(this));
99	<	assertEquals(0,a.getAndIncrement(this));
100	<	assertEquals(1,a.get(this));
211	>	assertEquals(1,a.getAndDecrement(this));
212	>	assertEquals(0,a.getAndDecrement(this));
213	>	assertEquals(-1,a.getAndDecrement(this));
214		}
215
216	<	public void testAddAndGet(){
217	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
216	>	/**
217	>	* getAndIncrement returns previous value and increments
218	>	*/
219	>	public void testGetAndIncrement() {
220	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
221	>	try {
222	>	a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
223	>	} catch (RuntimeException ok) {
224	>	return;
225	>	}
226		x = 1;
227	<	assertEquals(3,a.addAndGet(this,2));
228	<	assertEquals(3,a.get(this));
229	<	assertEquals(-1,a.addAndGet(this,-4));
230	<	assertEquals(-1,a.get(this));
227	>	assertEquals(1,a.getAndIncrement(this));
228	>	assertEquals(2,a.get(this));
229	>	a.set(this,-2);
230	>	assertEquals(-2,a.getAndIncrement(this));
231	>	assertEquals(-1,a.getAndIncrement(this));
232	>	assertEquals(0,a.getAndIncrement(this));
233	>	assertEquals(1,a.get(this));
234	>	}
235	>
236	>	/**
237	>	* addAndGet adds given value to current, and returns current value
238	>	*/
239	>	public void testAddAndGet() {
240	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
241	>	try {
242	>	a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
243	>	} catch (RuntimeException ok) {
244	>	return;
245	>	}
246	>	x = 1;
247	>	assertEquals(3,a.addAndGet(this,2));
248	>	assertEquals(3,a.get(this));
249	>	assertEquals(-1,a.addAndGet(this,-4));
250	>	assertEquals(-1,a.get(this));
251		}
252
253	<	public void testDecrementAndGet(){
254	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
253	>	/**
254	>	* decrementAndGet decrements and returns current value
255	>	*/
256	>	public void testDecrementAndGet() {
257	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
258	>	try {
259	>	a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
260	>	} catch (RuntimeException ok) {
261	>	return;
262	>	}
263		x = 1;
264	<	assertEquals(0,a.decrementAndGet(this));
265	<	assertEquals(-1,a.decrementAndGet(this));
266	<	assertEquals(-2,a.decrementAndGet(this));
267	<	assertEquals(-2,a.get(this));
264	>	assertEquals(0,a.decrementAndGet(this));
265	>	assertEquals(-1,a.decrementAndGet(this));
266	>	assertEquals(-2,a.decrementAndGet(this));
267	>	assertEquals(-2,a.get(this));
268		}
269
270	<	public void testIncrementAndGet(){
271	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
270	>	/**
271	>	* incrementAndGet increments and returns current value
272	>	*/
273	>	public void testIncrementAndGet() {
274	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
275	>	try {
276	>	a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
277	>	} catch (RuntimeException ok) {
278	>	return;
279	>	}
280		x = 1;
281	<	assertEquals(2,a.incrementAndGet(this));
282	<	assertEquals(2,a.get(this));
283	<	a.set(this,-2);
284	<	assertEquals(-1,a.incrementAndGet(this));
285	<	assertEquals(0,a.incrementAndGet(this));
286	<	assertEquals(1,a.incrementAndGet(this));
287	<	assertEquals(1,a.get(this));
281	>	assertEquals(2,a.incrementAndGet(this));
282	>	assertEquals(2,a.get(this));
283	>	a.set(this,-2);
284	>	assertEquals(-1,a.incrementAndGet(this));
285	>	assertEquals(0,a.incrementAndGet(this));
286	>	assertEquals(1,a.incrementAndGet(this));
287	>	assertEquals(1,a.get(this));
288		}
289
290		}

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