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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 1.18 by jsr166, Sat Oct 9 19:30:34 2010 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");
33	<	}
31	<	catch (RuntimeException rt) {}
31	>	(AtomicIntegerFieldUpdaterTest.class, "y");
32	>	shouldThrow();
33	>	} catch (RuntimeException success) {}
34		}
35
36	<	public void testGetSet(){
37	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
38	<	x = 1;
39	<	assertEquals(1,a.get(this));
40	<	a.set(this,2);
41	<	assertEquals(2,a.get(this));
42	<	a.set(this,-3);
43	<	assertEquals(-3,a.get(this));
44	<
36	>	/**
37	>	* construction with field not of given type throws RuntimeException
38	>	*/
39	>	public void testConstructor2() {
40	>	try {
41	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest>
42	>	a = AtomicIntegerFieldUpdater.newUpdater
43	>	(AtomicIntegerFieldUpdaterTest.class, "z");
44	>	shouldThrow();
45	>	} catch (RuntimeException success) {}
46		}
47	<	public void testCompareAndSet(){
48	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
49	<	x = 1;
50	<	assertTrue(a.compareAndSet(this,1,2));
51	<	assertTrue(a.compareAndSet(this,2,-4));
52	<	assertEquals(-4,a.get(this));
53	<	assertFalse(a.compareAndSet(this,-5,7));
54	<	assertFalse((7 == a.get(this)));
55	<	assertTrue(a.compareAndSet(this,-4,7));
56	<	assertEquals(7,a.get(this));
47	>
48	>	/**
49	>	* construction with non-volatile field throws RuntimeException
50	>	*/
51	>	public void testConstructor3() {
52	>	try {
53	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest>
54	>	a = AtomicIntegerFieldUpdater.newUpdater
55	>	(AtomicIntegerFieldUpdaterTest.class, "w");
56	>	shouldThrow();
57	>	} catch (RuntimeException success) {}
58		}
59
60	<	public void testWeakCompareAndSet(){
61	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
60	>	/**
61	>	* get returns the last value set or assigned
62	>	*/
63	>	public void testGetSet() {
64	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
65	>	try {
66	>	a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
67	>	} catch (RuntimeException ok) {
68	>	return;
69	>	}
70	>	x = 1;
71	>	assertEquals(1,a.get(this));
72	>	a.set(this,2);
73	>	assertEquals(2,a.get(this));
74	>	a.set(this,-3);
75	>	assertEquals(-3,a.get(this));
76	>	}
77	>
78	>	/**
79	>	* get returns the last value lazySet by same thread
80	>	*/
81	>	public void testGetLazySet() {
82	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
83	>	try {
84	>	a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
85	>	} catch (RuntimeException ok) {
86	>	return;
87	>	}
88	>	x = 1;
89	>	assertEquals(1,a.get(this));
90	>	a.lazySet(this,2);
91	>	assertEquals(2,a.get(this));
92	>	a.lazySet(this,-3);
93	>	assertEquals(-3,a.get(this));
94	>	}
95	>
96	>	/**
97	>	* compareAndSet succeeds in changing value if equal to expected else fails
98	>	*/
99	>	public void testCompareAndSet() {
100	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
101	>	try {
102	>	a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
103	>	} catch (RuntimeException ok) {
104	>	return;
105	>	}
106		x = 1;
107	<	while(!a.weakCompareAndSet(this,1,2));
108	<	while(!a.weakCompareAndSet(this,2,-4));
109	<	assertEquals(-4,a.get(this));
110	<	while(!a.weakCompareAndSet(this,-4,7));
111	<	assertEquals(7,a.get(this));
107	>	assertTrue(a.compareAndSet(this,1,2));
108	>	assertTrue(a.compareAndSet(this,2,-4));
109	>	assertEquals(-4,a.get(this));
110	>	assertFalse(a.compareAndSet(this,-5,7));
111	>	assertEquals(-4,a.get(this));
112	>	assertTrue(a.compareAndSet(this,-4,7));
113	>	assertEquals(7,a.get(this));
114		}
115
116	<	public void testGetAndSet(){
117	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
116	>
117	>	/**
118	>	* compareAndSet in one thread enables another waiting for value
119	>	* to succeed
120	>	*/
121	>	public void testCompareAndSetInMultipleThreads() throws Exception {
122		x = 1;
123	<	assertEquals(1,a.getAndSet(this, 0));
124	<	assertEquals(0,a.getAndSet(this,-10));
125	<	assertEquals(-10,a.getAndSet(this,1));
126	<	}
123	>	final AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest>a;
124	>	try {
125	>	a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
126	>	} catch (RuntimeException ok) {
127	>	return;
128	>	}
129
130	<	public void testGetAndAdd(){
131	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
130	>	Thread t = new Thread(new CheckedRunnable() {
131	>	public void realRun() {
132	>	while (!a.compareAndSet(AtomicIntegerFieldUpdaterTest.this, 2, 3))
133	>	Thread.yield();
134	>	}});
135	>
136	>	t.start();
137	>	assertTrue(a.compareAndSet(this, 1, 2));
138	>	t.join(LONG_DELAY_MS);
139	>	assertFalse(t.isAlive());
140	>	assertEquals(a.get(this), 3);
141	>	}
142	>
143	>	/**
144	>	* repeated weakCompareAndSet succeeds in changing value when equal
145	>	* to expected
146	>	*/
147	>	public void testWeakCompareAndSet() {
148	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
149	>	try {
150	>	a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
151	>	} catch (RuntimeException ok) {
152	>	return;
153	>	}
154		x = 1;
155	<	assertEquals(1,a.getAndAdd(this,2));
156	<	assertEquals(3,a.get(this));
157	<	assertEquals(3,a.getAndAdd(this,-4));
158	<	assertEquals(-1,a.get(this));
155	>	while (!a.weakCompareAndSet(this,1,2));
156	>	while (!a.weakCompareAndSet(this,2,-4));
157	>	assertEquals(-4,a.get(this));
158	>	while (!a.weakCompareAndSet(this,-4,7));
159	>	assertEquals(7,a.get(this));
160	>	}
161	>
162	>	/**
163	>	* getAndSet returns previous value and sets to given value
164	>	*/
165	>	public void testGetAndSet() {
166	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
167	>	try {
168	>	a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
169	>	} catch (RuntimeException ok) {
170	>	return;
171	>	}
172	>	x = 1;
173	>	assertEquals(1,a.getAndSet(this, 0));
174	>	assertEquals(0,a.getAndSet(this,-10));
175	>	assertEquals(-10,a.getAndSet(this,1));
176		}
177
178	<	public void testGetAndDecrement(){
179	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
178	>	/**
179	>	* getAndAdd returns previous value and adds given value
180	>	*/
181	>	public void testGetAndAdd() {
182	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
183	>	try {
184	>	a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
185	>	} catch (RuntimeException ok) {
186	>	return;
187	>	}
188		x = 1;
189	<	assertEquals(1,a.getAndDecrement(this));
190	<	assertEquals(0,a.getAndDecrement(this));
191	<	assertEquals(-1,a.getAndDecrement(this));
189	>	assertEquals(1,a.getAndAdd(this,2));
190	>	assertEquals(3,a.get(this));
191	>	assertEquals(3,a.getAndAdd(this,-4));
192	>	assertEquals(-1,a.get(this));
193		}
194
195	<	public void testGetAndIncrement(){
196	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
195	>	/**
196	>	* getAndDecrement returns previous value and decrements
197	>	*/
198	>	public void testGetAndDecrement() {
199	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
200	>	try {
201	>	a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
202	>	} catch (RuntimeException ok) {
203	>	return;
204	>	}
205		x = 1;
206	<	assertEquals(1,a.getAndIncrement(this));
207	<	assertEquals(2,a.get(this));
208	<	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));
206	>	assertEquals(1,a.getAndDecrement(this));
207	>	assertEquals(0,a.getAndDecrement(this));
208	>	assertEquals(-1,a.getAndDecrement(this));
209		}
210
211	<	public void testAddAndGet(){
212	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
211	>	/**
212	>	* getAndIncrement returns previous value and increments
213	>	*/
214	>	public void testGetAndIncrement() {
215	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
216	>	try {
217	>	a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
218	>	} catch (RuntimeException ok) {
219	>	return;
220	>	}
221	>	x = 1;
222	>	assertEquals(1,a.getAndIncrement(this));
223	>	assertEquals(2,a.get(this));
224	>	a.set(this,-2);
225	>	assertEquals(-2,a.getAndIncrement(this));
226	>	assertEquals(-1,a.getAndIncrement(this));
227	>	assertEquals(0,a.getAndIncrement(this));
228	>	assertEquals(1,a.get(this));
229	>	}
230	>
231	>	/**
232	>	* addAndGet adds given value to current, and returns current value
233	>	*/
234	>	public void testAddAndGet() {
235	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
236	>	try {
237	>	a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
238	>	} catch (RuntimeException ok) {
239	>	return;
240	>	}
241		x = 1;
242	<	assertEquals(3,a.addAndGet(this,2));
243	<	assertEquals(3,a.get(this));
244	<	assertEquals(-1,a.addAndGet(this,-4));
245	<	assertEquals(-1,a.get(this));
242	>	assertEquals(3,a.addAndGet(this,2));
243	>	assertEquals(3,a.get(this));
244	>	assertEquals(-1,a.addAndGet(this,-4));
245	>	assertEquals(-1,a.get(this));
246		}
247
248	<	public void testDecrementAndGet(){
249	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
248	>	/**
249	>	* decrementAndGet decrements and returns current value
250	>	*/
251	>	public void testDecrementAndGet() {
252	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
253	>	try {
254	>	a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
255	>	} catch (RuntimeException ok) {
256	>	return;
257	>	}
258		x = 1;
259	<	assertEquals(0,a.decrementAndGet(this));
260	<	assertEquals(-1,a.decrementAndGet(this));
261	<	assertEquals(-2,a.decrementAndGet(this));
262	<	assertEquals(-2,a.get(this));
259	>	assertEquals(0,a.decrementAndGet(this));
260	>	assertEquals(-1,a.decrementAndGet(this));
261	>	assertEquals(-2,a.decrementAndGet(this));
262	>	assertEquals(-2,a.get(this));
263		}
264
265	<	public void testIncrementAndGet(){
266	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
265	>	/**
266	>	* incrementAndGet increments and returns current value
267	>	*/
268	>	public void testIncrementAndGet() {
269	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
270	>	try {
271	>	a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
272	>	} catch (RuntimeException ok) {
273	>	return;
274	>	}
275		x = 1;
276	<	assertEquals(2,a.incrementAndGet(this));
277	<	assertEquals(2,a.get(this));
278	<	a.set(this,-2);
279	<	assertEquals(-1,a.incrementAndGet(this));
280	<	assertEquals(0,a.incrementAndGet(this));
281	<	assertEquals(1,a.incrementAndGet(this));
282	<	assertEquals(1,a.get(this));
276	>	assertEquals(2,a.incrementAndGet(this));
277	>	assertEquals(2,a.get(this));
278	>	a.set(this,-2);
279	>	assertEquals(-1,a.incrementAndGet(this));
280	>	assertEquals(0,a.incrementAndGet(this));
281	>	assertEquals(1,a.incrementAndGet(this));
282	>	assertEquals(1,a.get(this));
283		}
284
285		}

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