ViewVC Help

View File | Revision Log | Show Annotations | Download File | Root Listing

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 1.24 by jsr166, Mon Apr 1 20:58:58 2013 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>
27	<	a = AtomicLongFieldUpdater.newUpdater
28	<	(getClass(), "y");
29	<	fail("Exception not thrown");
30	<	}
31	<
32	<	catch (RuntimeException rt) {}
33	<	}
34	<
35	<	public void testConstructor2(){
36	<	try{
37	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>
38	<	a = AtomicLongFieldUpdater.newUpdater
39	<	(getClass(), "z");
40	<	fail("Exception not thrown");
41	<	}
42	<
43	<	catch (RuntimeException rt) {}
44	<	}
45	<
46	<	public void testConstructor3(){
47	<	try{
48	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>
49	<	a = AtomicLongFieldUpdater.newUpdater
50	<	(getClass(), "w");
51	<	fail("Exception not thrown");
52	<	}
53	<
54	<	catch (RuntimeException rt) {}
55	<	}
56	<
57	<	public void testGetSet(){
58	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
59	<	x = 1;
60	<	assertEquals(1,a.get(this));
61	<	a.set(this,2);
62	<	assertEquals(2,a.get(this));
63	<	a.set(this,-3);
64	<	assertEquals(-3,a.get(this));
65	<
66	<	}
67	<	public void testCompareAndSet(){
68	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
69	<	x = 1;
70	<	assertTrue(a.compareAndSet(this,1,2));
71	<	assertTrue(a.compareAndSet(this,2,-4));
72	<	assertEquals(-4,a.get(this));
73	<	assertFalse(a.compareAndSet(this,-5,7));
74	<	assertFalse((7 == a.get(this)));
75	<	assertTrue(a.compareAndSet(this,-4,7));
76	<	assertEquals(7,a.get(this));
77	<	}
78	<
79	<	public void testWeakCompareAndSet(){
80	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
81	<	x = 1;
82	<	while(!a.weakCompareAndSet(this,1,2));
83	<	while(!a.weakCompareAndSet(this,2,-4));
84	<	assertEquals(-4,a.get(this));
85	<	while(!a.weakCompareAndSet(this,-4,7));
86	<	assertEquals(7,a.get(this));
87	<	}
88	<
89	<	public void testGetAndSet(){
90	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
91	<	x = 1;
92	<	assertEquals(1,a.getAndSet(this, 0));
93	<	assertEquals(0,a.getAndSet(this,-10));
94	<	assertEquals(-10,a.getAndSet(this,1));
95	<	}
96	<
97	<	public void testGetAndAdd(){
98	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
99	<	x = 1;
100	<	assertEquals(1,a.getAndAdd(this,2));
101	<	assertEquals(3,a.get(this));
102	<	assertEquals(3,a.getAndAdd(this,-4));
103	<	assertEquals(-1,a.get(this));
104	<	}
105	<
106	<	public void testGetAndDecrement(){
107	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
108	<	x = 1;
109	<	assertEquals(1,a.getAndDecrement(this));
110	<	assertEquals(0,a.getAndDecrement(this));
111	<	assertEquals(-1,a.getAndDecrement(this));
112	<	}
113	<
114	<	public void testGetAndIncrement(){
115	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
116	<	x = 1;
117	<	assertEquals(1,a.getAndIncrement(this));
118	<	assertEquals(2,a.get(this));
119	<	a.set(this,-2);
120	<	assertEquals(-2,a.getAndIncrement(this));
121	<	assertEquals(-1,a.getAndIncrement(this));
122	<	assertEquals(0,a.getAndIncrement(this));
123	<	assertEquals(1,a.get(this));
124	<	}
125	<
126	<	public void testAddAndGet(){
127	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
128	<	x = 1;
129	<	assertEquals(3,a.addAndGet(this,2));
130	<	assertEquals(3,a.get(this));
131	<	assertEquals(-1,a.addAndGet(this,-4));
132	<	assertEquals(-1,a.get(this));
133	<	}
134	<
135	<	public void testDecrementAndGet(){
136	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
137	<	x = 1;
138	<	assertEquals(0,a.decrementAndGet(this));
139	<	assertEquals(-1,a.decrementAndGet(this));
140	<	assertEquals(-2,a.decrementAndGet(this));
141	<	assertEquals(-2,a.get(this));
142	<	}
143	<
144	<	public void testIncrementAndGet(){
145	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
146	<	x = 1;
147	<	assertEquals(2,a.incrementAndGet(this));
148	<	assertEquals(2,a.get(this));
149	<	a.set(this,-2);
150	<	assertEquals(-1,a.incrementAndGet(this));
151	<	assertEquals(0,a.incrementAndGet(this));
152	<	assertEquals(1,a.incrementAndGet(this));
153	<	assertEquals(1,a.get(this));
24	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> updaterFor(String fieldName) {
25	>	return AtomicLongFieldUpdater.newUpdater
26	>	(AtomicLongFieldUpdaterTest.class, fieldName);
27	>	}
28	>
29	>	/**
30	>	* Construction with non-existent field throws RuntimeException
31	>	*/
32	>	public void testConstructor() {
33	>	try {
34	>	updaterFor("y");
35	>	shouldThrow();
36	>	} catch (RuntimeException success) {}
37	>	}
38	>
39	>	/**
40	>	* construction with field not of given type throws RuntimeException
41	>	*/
42	>	public void testConstructor2() {
43	>	try {
44	>	updaterFor("z");
45	>	shouldThrow();
46	>	} catch (RuntimeException success) {}
47	>	}
48	>
49	>	/**
50	>	* construction with non-volatile field throws RuntimeException
51	>	*/
52	>	public void testConstructor3() {
53	>	try {
54	>	updaterFor("w");
55	>	shouldThrow();
56	>	} catch (RuntimeException success) {}
57	>	}
58	>
59	>	/**
60	>	* get returns the last value set or assigned
61	>	*/
62	>	public void testGetSet() {
63	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
64	>	a = updaterFor("x");
65	>	x = 1;
66	>	assertEquals(1, a.get(this));
67	>	a.set(this, 2);
68	>	assertEquals(2, a.get(this));
69	>	a.set(this, -3);
70	>	assertEquals(-3, a.get(this));
71	>	}
72	>
73	>	/**
74	>	* get returns the last value lazySet by same thread
75	>	*/
76	>	public void testGetLazySet() {
77	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
78	>	a = updaterFor("x");
79	>	x = 1;
80	>	assertEquals(1, a.get(this));
81	>	a.lazySet(this, 2);
82	>	assertEquals(2, a.get(this));
83	>	a.lazySet(this, -3);
84	>	assertEquals(-3, a.get(this));
85	>	}
86	>
87	>	/**
88	>	* compareAndSet succeeds in changing value if equal to expected else fails
89	>	*/
90	>	public void testCompareAndSet() {
91	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
92	>	a = updaterFor("x");
93	>	x = 1;
94	>	assertTrue(a.compareAndSet(this, 1, 2));
95	>	assertTrue(a.compareAndSet(this, 2, -4));
96	>	assertEquals(-4, a.get(this));
97	>	assertFalse(a.compareAndSet(this, -5, 7));
98	>	assertEquals(-4, a.get(this));
99	>	assertTrue(a.compareAndSet(this, -4, 7));
100	>	assertEquals(7, a.get(this));
101	>	}
102	>
103	>	/**
104	>	* compareAndSet in one thread enables another waiting for value
105	>	* to succeed
106	>	*/
107	>	public void testCompareAndSetInMultipleThreads() throws Exception {
108	>	x = 1;
109	>	final AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
110	>	a = updaterFor("x");
111	>
112	>	Thread t = new Thread(new CheckedRunnable() {
113	>	public void realRun() {
114	>	while (!a.compareAndSet(AtomicLongFieldUpdaterTest.this, 2, 3))
115	>	Thread.yield();
116	>	}});
117	>
118	>	t.start();
119	>	assertTrue(a.compareAndSet(this, 1, 2));
120	>	t.join(LONG_DELAY_MS);
121	>	assertFalse(t.isAlive());
122	>	assertEquals(3, a.get(this));
123	>	}
124	>
125	>	/**
126	>	* repeated weakCompareAndSet succeeds in changing value when equal
127	>	* to expected
128	>	*/
129	>	public void testWeakCompareAndSet() {
130	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
131	>	a = updaterFor("x");
132	>	x = 1;
133	>	while (!a.weakCompareAndSet(this, 1, 2));
134	>	while (!a.weakCompareAndSet(this, 2, -4));
135	>	assertEquals(-4, a.get(this));
136	>	while (!a.weakCompareAndSet(this, -4, 7));
137	>	assertEquals(7, a.get(this));
138	>	}
139	>
140	>	/**
141	>	* getAndSet returns previous value and sets to given value
142	>	*/
143	>	public void testGetAndSet() {
144	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
145	>	a = updaterFor("x");
146	>	x = 1;
147	>	assertEquals(1, a.getAndSet(this, 0));
148	>	assertEquals(0, a.getAndSet(this, -10));
149	>	assertEquals(-10, a.getAndSet(this, 1));
150	>	}
151	>
152	>	/**
153	>	* getAndAdd returns previous value and adds given value
154	>	*/
155	>	public void testGetAndAdd() {
156	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
157	>	a = updaterFor("x");
158	>	x = 1;
159	>	assertEquals(1, a.getAndAdd(this, 2));
160	>	assertEquals(3, a.get(this));
161	>	assertEquals(3, a.getAndAdd(this, -4));
162	>	assertEquals(-1, a.get(this));
163	>	}
164	>
165	>	/**
166	>	* getAndDecrement returns previous value and decrements
167	>	*/
168	>	public void testGetAndDecrement() {
169	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
170	>	a = updaterFor("x");
171	>	x = 1;
172	>	assertEquals(1, a.getAndDecrement(this));
173	>	assertEquals(0, a.getAndDecrement(this));
174	>	assertEquals(-1, a.getAndDecrement(this));
175	>	}
176	>
177	>	/**
178	>	* getAndIncrement returns previous value and increments
179	>	*/
180	>	public void testGetAndIncrement() {
181	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
182	>	a = updaterFor("x");
183	>	x = 1;
184	>	assertEquals(1, a.getAndIncrement(this));
185	>	assertEquals(2, a.get(this));
186	>	a.set(this, -2);
187	>	assertEquals(-2, a.getAndIncrement(this));
188	>	assertEquals(-1, a.getAndIncrement(this));
189	>	assertEquals(0, a.getAndIncrement(this));
190	>	assertEquals(1, a.get(this));
191	>	}
192	>
193	>	/**
194	>	* addAndGet adds given value to current, and returns current value
195	>	*/
196	>	public void testAddAndGet() {
197	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
198	>	a = updaterFor("x");
199	>	x = 1;
200	>	assertEquals(3, a.addAndGet(this, 2));
201	>	assertEquals(3, a.get(this));
202	>	assertEquals(-1, a.addAndGet(this, -4));
203	>	assertEquals(-1, a.get(this));
204	>	}
205	>
206	>	/**
207	>	* decrementAndGet decrements and returns current value
208	>	*/
209	>	public void testDecrementAndGet() {
210	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
211	>	a = updaterFor("x");
212	>	x = 1;
213	>	assertEquals(0, a.decrementAndGet(this));
214	>	assertEquals(-1, a.decrementAndGet(this));
215	>	assertEquals(-2, a.decrementAndGet(this));
216	>	assertEquals(-2, a.get(this));
217	>	}
218	>
219	>	/**
220	>	* incrementAndGet increments and returns current value
221	>	*/
222	>	public void testIncrementAndGet() {
223	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
224	>	a = updaterFor("x");
225	>	x = 1;
226	>	assertEquals(2, a.incrementAndGet(this));
227	>	assertEquals(2, a.get(this));
228	>	a.set(this, -2);
229	>	assertEquals(-1, a.incrementAndGet(this));
230	>	assertEquals(0, a.incrementAndGet(this));
231	>	assertEquals(1, a.incrementAndGet(this));
232	>	assertEquals(1, a.get(this));
233		}
234
235		}

Diff Legend

–	Removed lines
+	Added lines
<	Changed lines
>	Changed lines