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

Comparing jsr166/src/test/tck/AtomicLongFieldUpdaterTest.java (file contents):
Revision 1.1 by dl, Sun Aug 31 19:24:53 2003 UTC vs.
Revision 1.23 by jsr166, Fri Jun 10 20:17:11 2011 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
8	–	import java.util.concurrent.atomic.*;
9		import junit.framework.*;
10	<	import java.util.*;
10	>	import java.util.concurrent.atomic.AtomicLongFieldUpdater;
11
12	<	public class AtomicLongFieldUpdaterTest extends TestCase{
12	>	public class AtomicLongFieldUpdaterTest extends JSR166TestCase {
13		volatile long x = 0;
14	<	long z;
15	<	int w;
14	>	int z;
15	>	long w;
16
17	<	public static void main(String[] args){
17	>	public static void main(String[] args) {
18		junit.textui.TestRunner.run(suite());
19		}
20	–
21	–
20		public static Test suite() {
21		return new TestSuite(AtomicLongFieldUpdaterTest.class);
22		}
23
24	<	public void testConstructor(){
25	<	try{
26	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>
24	>	/**
25	>	* Construction with non-existent field throws RuntimeException
26	>	*/
27	>	public void testConstructor() {
28	>	try {
29	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>
30		a = AtomicLongFieldUpdater.newUpdater
31	<	(getClass(), "y");
32	<	fail("Exception not thrown");
33	<	}
33	<
34	<	catch (RuntimeException rt) {}
31	>	(AtomicLongFieldUpdaterTest.class, "y");
32	>	shouldThrow();
33	>	} catch (RuntimeException success) {}
34		}
35
36	<	public void testConstructor2(){
37	<	try{
38	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>
36	>	/**
37	>	* construction with field not of given type throws RuntimeException
38	>	*/
39	>	public void testConstructor2() {
40	>	try {
41	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>
42		a = AtomicLongFieldUpdater.newUpdater
43	<	(getClass(), "z");
44	<	fail("Exception not thrown");
45	<	}
44	<
45	<	catch (RuntimeException rt) {}
43	>	(AtomicLongFieldUpdaterTest.class, "z");
44	>	shouldThrow();
45	>	} catch (RuntimeException success) {}
46		}
47
48	<	public void testConstructor3(){
49	<	try{
50	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>
48	>	/**
49	>	* construction with non-volatile field throws RuntimeException
50	>	*/
51	>	public void testConstructor3() {
52	>	try {
53	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>
54		a = AtomicLongFieldUpdater.newUpdater
55	<	(getClass(), "w");
56	<	fail("Exception not thrown");
57	<	}
55	<
56	<	catch (RuntimeException rt) {}
55	>	(AtomicLongFieldUpdaterTest.class, "w");
56	>	shouldThrow();
57	>	} catch (RuntimeException success) {}
58		}
59
60	<	public void testGetSet(){
61	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
60	>	/**
61	>	* get returns the last value set or assigned
62	>	*/
63	>	public void testGetSet() {
64	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
65	>	try {
66	>	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.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	<	public void testCompareAndSet(){
79	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
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	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
83	>	try {
84	>	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
85	>	} catch (RuntimeException ok) {
86	>	return;
87	>	}
88		x = 1;
89	<	assertTrue(a.compareAndSet(this,1,2));
90	<	assertTrue(a.compareAndSet(this,2,-4));
91	<	assertEquals(-4,a.get(this));
92	<	assertFalse(a.compareAndSet(this,-5,7));
93	<	assertFalse((7 == a.get(this)));
94	<	assertTrue(a.compareAndSet(this,-4,7));
95	<	assertEquals(7,a.get(this));
96	<	}
97	<
98	<	public void testWeakCompareAndSet(){
99	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
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	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
101	>	try {
102	>	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.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	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
116	>	/**
117	>	* compareAndSet in one thread enables another waiting for value
118	>	* to succeed
119	>	*/
120	>	public void testCompareAndSetInMultipleThreads() throws Exception {
121		x = 1;
122	<	assertEquals(1,a.getAndSet(this, 0));
123	<	assertEquals(0,a.getAndSet(this,-10));
124	<	assertEquals(-10,a.getAndSet(this,1));
125	<	}
122	>	final AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>a;
123	>	try {
124	>	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
125	>	} catch (RuntimeException ok) {
126	>	return;
127	>	}
128
129	<	public void testGetAndAdd(){
130	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
129	>	Thread t = new Thread(new CheckedRunnable() {
130	>	public void realRun() {
131	>	while (!a.compareAndSet(AtomicLongFieldUpdaterTest.this, 2, 3))
132	>	Thread.yield();
133	>	}});
134	>
135	>	t.start();
136	>	assertTrue(a.compareAndSet(this, 1, 2));
137	>	t.join(LONG_DELAY_MS);
138	>	assertFalse(t.isAlive());
139	>	assertEquals(3, a.get(this));
140	>	}
141	>
142	>	/**
143	>	* repeated weakCompareAndSet succeeds in changing value when equal
144	>	* to expected
145	>	*/
146	>	public void testWeakCompareAndSet() {
147	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
148	>	try {
149	>	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
150	>	} catch (RuntimeException ok) {
151	>	return;
152	>	}
153		x = 1;
154	<	assertEquals(1,a.getAndAdd(this,2));
155	<	assertEquals(3,a.get(this));
156	<	assertEquals(3,a.getAndAdd(this,-4));
157	<	assertEquals(-1,a.get(this));
154	>	while (!a.weakCompareAndSet(this, 1, 2));
155	>	while (!a.weakCompareAndSet(this, 2, -4));
156	>	assertEquals(-4, a.get(this));
157	>	while (!a.weakCompareAndSet(this, -4, 7));
158	>	assertEquals(7, a.get(this));
159	>	}
160	>
161	>	/**
162	>	* getAndSet returns previous value and sets to given value
163	>	*/
164	>	public void testGetAndSet() {
165	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
166	>	try {
167	>	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
168	>	} catch (RuntimeException ok) {
169	>	return;
170	>	}
171	>	x = 1;
172	>	assertEquals(1, a.getAndSet(this, 0));
173	>	assertEquals(0, a.getAndSet(this, -10));
174	>	assertEquals(-10, a.getAndSet(this, 1));
175		}
176
177	<	public void testGetAndDecrement(){
178	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
177	>	/**
178	>	* getAndAdd returns previous value and adds given value
179	>	*/
180	>	public void testGetAndAdd() {
181	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
182	>	try {
183	>	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
184	>	} catch (RuntimeException ok) {
185	>	return;
186	>	}
187		x = 1;
188	<	assertEquals(1,a.getAndDecrement(this));
189	<	assertEquals(0,a.getAndDecrement(this));
190	<	assertEquals(-1,a.getAndDecrement(this));
188	>	assertEquals(1, a.getAndAdd(this, 2));
189	>	assertEquals(3, a.get(this));
190	>	assertEquals(3, a.getAndAdd(this, -4));
191	>	assertEquals(-1, a.get(this));
192		}
193
194	<	public void testGetAndIncrement(){
195	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
194	>	/**
195	>	* getAndDecrement returns previous value and decrements
196	>	*/
197	>	public void testGetAndDecrement() {
198	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
199	>	try {
200	>	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
201	>	} catch (RuntimeException ok) {
202	>	return;
203	>	}
204		x = 1;
205	<	assertEquals(1,a.getAndIncrement(this));
206	<	assertEquals(2,a.get(this));
207	<	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));
205	>	assertEquals(1, a.getAndDecrement(this));
206	>	assertEquals(0, a.getAndDecrement(this));
207	>	assertEquals(-1, a.getAndDecrement(this));
208		}
209
210	<	public void testAddAndGet(){
211	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
210	>	/**
211	>	* getAndIncrement returns previous value and increments
212	>	*/
213	>	public void testGetAndIncrement() {
214	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
215	>	try {
216	>	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
217	>	} catch (RuntimeException ok) {
218	>	return;
219	>	}
220	>	x = 1;
221	>	assertEquals(1, a.getAndIncrement(this));
222	>	assertEquals(2, a.get(this));
223	>	a.set(this, -2);
224	>	assertEquals(-2, a.getAndIncrement(this));
225	>	assertEquals(-1, a.getAndIncrement(this));
226	>	assertEquals(0, a.getAndIncrement(this));
227	>	assertEquals(1, a.get(this));
228	>	}
229	>
230	>	/**
231	>	* addAndGet adds given value to current, and returns current value
232	>	*/
233	>	public void testAddAndGet() {
234	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
235	>	try {
236	>	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
237	>	} catch (RuntimeException ok) {
238	>	return;
239	>	}
240		x = 1;
241	<	assertEquals(3,a.addAndGet(this,2));
242	<	assertEquals(3,a.get(this));
243	<	assertEquals(-1,a.addAndGet(this,-4));
244	<	assertEquals(-1,a.get(this));
241	>	assertEquals(3, a.addAndGet(this, 2));
242	>	assertEquals(3, a.get(this));
243	>	assertEquals(-1, a.addAndGet(this, -4));
244	>	assertEquals(-1, a.get(this));
245		}
246
247	<	public void testDecrementAndGet(){
248	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
247	>	/**
248	>	* decrementAndGet decrements and returns current value
249	>	*/
250	>	public void testDecrementAndGet() {
251	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
252	>	try {
253	>	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
254	>	} catch (RuntimeException ok) {
255	>	return;
256	>	}
257		x = 1;
258	<	assertEquals(0,a.decrementAndGet(this));
259	<	assertEquals(-1,a.decrementAndGet(this));
260	<	assertEquals(-2,a.decrementAndGet(this));
261	<	assertEquals(-2,a.get(this));
258	>	assertEquals(0, a.decrementAndGet(this));
259	>	assertEquals(-1, a.decrementAndGet(this));
260	>	assertEquals(-2, a.decrementAndGet(this));
261	>	assertEquals(-2, a.get(this));
262		}
263
264	<	public void testIncrementAndGet(){
265	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
264	>	/**
265	>	* incrementAndGet increments and returns current value
266	>	*/
267	>	public void testIncrementAndGet() {
268	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
269	>	try {
270	>	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
271	>	} catch (RuntimeException ok) {
272	>	return;
273	>	}
274		x = 1;
275	<	assertEquals(2,a.incrementAndGet(this));
276	<	assertEquals(2,a.get(this));
277	<	a.set(this,-2);
278	<	assertEquals(-1,a.incrementAndGet(this));
279	<	assertEquals(0,a.incrementAndGet(this));
280	<	assertEquals(1,a.incrementAndGet(this));
281	<	assertEquals(1,a.get(this));
275	>	assertEquals(2, a.incrementAndGet(this));
276	>	assertEquals(2, a.get(this));
277	>	a.set(this, -2);
278	>	assertEquals(-1, a.incrementAndGet(this));
279	>	assertEquals(0, a.incrementAndGet(this));
280	>	assertEquals(1, a.incrementAndGet(this));
281	>	assertEquals(1, a.get(this));
282		}
283
284		}

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