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root/jsr166/jsr166/src/test/tck/AtomicLongFieldUpdaterTest.java

Comparing jsr166/src/test/tck/AtomicLongFieldUpdaterTest.java (file contents):
Revision 1.2 by dl, Sun Sep 14 20:42:40 2003 UTC vs.
Revision 1.14 by jsr166, Tue Nov 17 06:58:50 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.*;
#	Line 11 | Line 12 | import java.util.*;
12
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");
32	>	(AtomicLongFieldUpdaterTest.class, "y");
33	>	shouldThrow();
34		}
33	–
35		catch (RuntimeException rt) {}
36		}
37
38	<	public void testConstructor2(){
39	<	try{
40	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>
38	>	/**
39	>	* construction with field not of given type throws RuntimeException
40	>	*/
41	>	public void testConstructor2() {
42	>	try {
43	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>
44		a = AtomicLongFieldUpdater.newUpdater
45	<	(getClass(), "z");
46	<	fail("Exception not thrown");
45	>	(AtomicLongFieldUpdaterTest.class, "z");
46	>	shouldThrow();
47		}
44	–
48		catch (RuntimeException rt) {}
49		}
50
51	<	public void testConstructor3(){
52	<	try{
53	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>
51	>	/**
52	>	* construction with non-volatile field throws RuntimeException
53	>	*/
54	>	public void testConstructor3() {
55	>	try {
56	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>
57		a = AtomicLongFieldUpdater.newUpdater
58	<	(getClass(), "w");
59	<	fail("Exception not thrown");
58	>	(AtomicLongFieldUpdaterTest.class, "w");
59	>	shouldThrow();
60		}
61
62		catch (RuntimeException rt) {}
63		}
64
65	<	public void testGetSet(){
66	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
65	>	/**
66	>	*  get returns the last value set or assigned
67	>	*/
68	>	public void testGetSet() {
69	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
70	>	try {
71	>	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
72	>	} catch (RuntimeException ok) {
73	>	return;
74	>	}
75		x = 1;
76		assertEquals(1,a.get(this));
77		a.set(this,2);
78		assertEquals(2,a.get(this));
79		a.set(this,-3);
80		assertEquals(-3,a.get(this));
67	–
81		}
82	<	public void testCompareAndSet(){
83	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
82	>
83	>	/**
84	>	*  get returns the last value lazySet by same thread
85	>	*/
86	>	public void testGetLazySet() {
87	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
88	>	try {
89	>	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
90	>	} catch (RuntimeException ok) {
91	>	return;
92	>	}
93	>	x = 1;
94	>	assertEquals(1,a.get(this));
95	>	a.lazySet(this,2);
96	>	assertEquals(2,a.get(this));
97	>	a.lazySet(this,-3);
98	>	assertEquals(-3,a.get(this));
99	>	}
100	>
101	>
102	>	/**
103	>	* compareAndSet succeeds in changing value if equal to expected else fails
104	>	*/
105	>	public void testCompareAndSet() {
106	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
107	>	try {
108	>	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
109	>	} catch (RuntimeException ok) {
110	>	return;
111	>	}
112		x = 1;
113		assertTrue(a.compareAndSet(this,1,2));
114		assertTrue(a.compareAndSet(this,2,-4));
#	Line 78 | Line 119 | public class AtomicLongFieldUpdaterTest
119		assertEquals(7,a.get(this));
120		}
121
122	<	public void testWeakCompareAndSet(){
123	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
122	>
123	>	/**
124	>	* compareAndSet in one thread enables another waiting for value
125	>	* to succeed
126	>	*/
127	>	public void testCompareAndSetInMultipleThreads() throws Exception {
128		x = 1;
129	<	while(!a.weakCompareAndSet(this,1,2));
130	<	while(!a.weakCompareAndSet(this,2,-4));
129	>	final AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>a;
130	>	try {
131	>	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
132	>	} catch (RuntimeException ok) {
133	>	return;
134	>	}
135	>
136	>	Thread t = new Thread(new CheckedRunnable() {
137	>	public void realRun() {
138	>	while (!a.compareAndSet(AtomicLongFieldUpdaterTest.this, 2, 3))
139	>	Thread.yield();
140	>	}});
141	>
142	>	t.start();
143	>	assertTrue(a.compareAndSet(this, 1, 2));
144	>	t.join(LONG_DELAY_MS);
145	>	assertFalse(t.isAlive());
146	>	assertEquals(a.get(this), 3);
147	>	}
148	>
149	>	/**
150	>	* repeated weakCompareAndSet succeeds in changing value when equal
151	>	* to expected
152	>	*/
153	>	public void testWeakCompareAndSet() {
154	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
155	>	try {
156	>	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
157	>	} catch (RuntimeException ok) {
158	>	return;
159	>	}
160	>	x = 1;
161	>	while (!a.weakCompareAndSet(this,1,2));
162	>	while (!a.weakCompareAndSet(this,2,-4));
163		assertEquals(-4,a.get(this));
164	<	while(!a.weakCompareAndSet(this,-4,7));
164	>	while (!a.weakCompareAndSet(this,-4,7));
165		assertEquals(7,a.get(this));
166		}
167
168	<	public void testGetAndSet(){
169	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
168	>	/**
169	>	*  getAndSet returns previous value and sets to given value
170	>	*/
171	>	public void testGetAndSet() {
172	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
173	>	try {
174	>	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
175	>	} catch (RuntimeException ok) {
176	>	return;
177	>	}
178		x = 1;
179		assertEquals(1,a.getAndSet(this, 0));
180		assertEquals(0,a.getAndSet(this,-10));
181		assertEquals(-10,a.getAndSet(this,1));
182		}
183
184	<	public void testGetAndAdd(){
185	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
184	>	/**
185	>	* getAndAdd returns previous value and adds given value
186	>	*/
187	>	public void testGetAndAdd() {
188	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
189	>	try {
190	>	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
191	>	} catch (RuntimeException ok) {
192	>	return;
193	>	}
194		x = 1;
195		assertEquals(1,a.getAndAdd(this,2));
196		assertEquals(3,a.get(this));
#	Line 105 | Line 198 | public class AtomicLongFieldUpdaterTest
198		assertEquals(-1,a.get(this));
199		}
200
201	<	public void testGetAndDecrement(){
202	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
201	>	/**
202	>	* getAndDecrement returns previous value and decrements
203	>	*/
204	>	public void testGetAndDecrement() {
205	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
206	>	try {
207	>	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
208	>	} catch (RuntimeException ok) {
209	>	return;
210	>	}
211		x = 1;
212		assertEquals(1,a.getAndDecrement(this));
213		assertEquals(0,a.getAndDecrement(this));
214		assertEquals(-1,a.getAndDecrement(this));
215		}
216
217	<	public void testGetAndIncrement(){
218	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
217	>	/**
218	>	* getAndIncrement returns previous value and increments
219	>	*/
220	>	public void testGetAndIncrement() {
221	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
222	>	try {
223	>	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
224	>	} catch (RuntimeException ok) {
225	>	return;
226	>	}
227		x = 1;
228		assertEquals(1,a.getAndIncrement(this));
229		assertEquals(2,a.get(this));
#	Line 125 | Line 234 | public class AtomicLongFieldUpdaterTest
234		assertEquals(1,a.get(this));
235		}
236
237	<	public void testAddAndGet(){
238	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
237	>	/**
238	>	* addAndGet adds given value to current, and returns current value
239	>	*/
240	>	public void testAddAndGet() {
241	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
242	>	try {
243	>	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
244	>	} catch (RuntimeException ok) {
245	>	return;
246	>	}
247		x = 1;
248		assertEquals(3,a.addAndGet(this,2));
249		assertEquals(3,a.get(this));
#	Line 134 | Line 251 | public class AtomicLongFieldUpdaterTest
251		assertEquals(-1,a.get(this));
252		}
253
254	<	public void testDecrementAndGet(){
255	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
254	>	/**
255	>	*  decrementAndGet decrements and returns current value
256	>	*/
257	>	public void testDecrementAndGet() {
258	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
259	>	try {
260	>	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
261	>	} catch (RuntimeException ok) {
262	>	return;
263	>	}
264		x = 1;
265		assertEquals(0,a.decrementAndGet(this));
266		assertEquals(-1,a.decrementAndGet(this));
#	Line 143 | Line 268 | public class AtomicLongFieldUpdaterTest
268		assertEquals(-2,a.get(this));
269		}
270
271	<	public void testIncrementAndGet(){
272	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
271	>	/**
272	>	* incrementAndGet increments and returns current value
273	>	*/
274	>	public void testIncrementAndGet() {
275	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
276	>	try {
277	>	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
278	>	} catch (RuntimeException ok) {
279	>	return;
280	>	}
281		x = 1;
282		assertEquals(2,a.incrementAndGet(this));
283		assertEquals(2,a.get(this));

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