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

Comparing jsr166/src/test/tck/AtomicIntegerFieldUpdaterTest.java (file contents):
Revision 1.1 by dl, Sun Aug 31 19:24:53 2003 UTC vs.
Revision 1.24 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.AtomicIntegerFieldUpdater;
11
12	<	public class AtomicIntegerFieldUpdaterTest extends TestCase{
12	>	public class AtomicIntegerFieldUpdaterTest extends JSR166TestCase {
13		volatile int x = 0;
14	<
15	<	public static void main(String[] args){
14	>	int w;
15	>	long z;
16	>	public static void main(String[] args) {
17		junit.textui.TestRunner.run(suite());
18		}
18	–
19	–
19		public static Test suite() {
20		return new TestSuite(AtomicIntegerFieldUpdaterTest.class);
21		}
22
23	<	public void testConstructor(){
24	<	try{
25	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest>
26	<	a = AtomicIntegerFieldUpdater.newUpdater
27	<	(getClass(), "y");
28	<	fail("Exception not thrown");
29	<	}
30	<	catch (RuntimeException rt) {}
31	<	}
32	<
33	<	public void testGetSet(){
34	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
35	<	x = 1;
36	<	assertEquals(1,a.get(this));
37	<	a.set(this,2);
38	<	assertEquals(2,a.get(this));
39	<	a.set(this,-3);
40	<	assertEquals(-3,a.get(this));
41	<
42	<	}
43	<	public void testCompareAndSet(){
44	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
45	<	x = 1;
46	<	assertTrue(a.compareAndSet(this,1,2));
47	<	assertTrue(a.compareAndSet(this,2,-4));
48	<	assertEquals(-4,a.get(this));
49	<	assertFalse(a.compareAndSet(this,-5,7));
50	<	assertFalse((7 == a.get(this)));
51	<	assertTrue(a.compareAndSet(this,-4,7));
52	<	assertEquals(7,a.get(this));
53	<	}
54	<
55	<	public void testWeakCompareAndSet(){
56	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
57	<	x = 1;
58	<	while(!a.weakCompareAndSet(this,1,2));
59	<	while(!a.weakCompareAndSet(this,2,-4));
60	<	assertEquals(-4,a.get(this));
61	<	while(!a.weakCompareAndSet(this,-4,7));
62	<	assertEquals(7,a.get(this));
63	<	}
64	<
65	<	public void testGetAndSet(){
66	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
67	<	x = 1;
68	<	assertEquals(1,a.getAndSet(this, 0));
69	<	assertEquals(0,a.getAndSet(this,-10));
70	<	assertEquals(-10,a.getAndSet(this,1));
71	<	}
72	<
73	<	public void testGetAndAdd(){
74	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
75	<	x = 1;
76	<	assertEquals(1,a.getAndAdd(this,2));
77	<	assertEquals(3,a.get(this));
78	<	assertEquals(3,a.getAndAdd(this,-4));
79	<	assertEquals(-1,a.get(this));
80	<	}
81	<
82	<	public void testGetAndDecrement(){
83	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
84	<	x = 1;
85	<	assertEquals(1,a.getAndDecrement(this));
86	<	assertEquals(0,a.getAndDecrement(this));
87	<	assertEquals(-1,a.getAndDecrement(this));
88	<	}
89	<
90	<	public void testGetAndIncrement(){
91	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
92	<	x = 1;
93	<	assertEquals(1,a.getAndIncrement(this));
94	<	assertEquals(2,a.get(this));
95	<	a.set(this,-2);
96	<	assertEquals(-2,a.getAndIncrement(this));
97	<	assertEquals(-1,a.getAndIncrement(this));
98	<	assertEquals(0,a.getAndIncrement(this));
99	<	assertEquals(1,a.get(this));
100	<	}
101	<
102	<	public void testAddAndGet(){
103	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
104	<	x = 1;
105	<	assertEquals(3,a.addAndGet(this,2));
106	<	assertEquals(3,a.get(this));
107	<	assertEquals(-1,a.addAndGet(this,-4));
108	<	assertEquals(-1,a.get(this));
109	<	}
110	<
111	<	public void testDecrementAndGet(){
112	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
113	<	x = 1;
114	<	assertEquals(0,a.decrementAndGet(this));
115	<	assertEquals(-1,a.decrementAndGet(this));
116	<	assertEquals(-2,a.decrementAndGet(this));
117	<	assertEquals(-2,a.get(this));
118	<	}
119	<
120	<	public void testIncrementAndGet(){
121	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
122	<	x = 1;
123	<	assertEquals(2,a.incrementAndGet(this));
124	<	assertEquals(2,a.get(this));
125	<	a.set(this,-2);
126	<	assertEquals(-1,a.incrementAndGet(this));
127	<	assertEquals(0,a.incrementAndGet(this));
128	<	assertEquals(1,a.incrementAndGet(this));
129	<	assertEquals(1,a.get(this));
23	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> updaterFor(String fieldName) {
24	>	return AtomicIntegerFieldUpdater.newUpdater
25	>	(AtomicIntegerFieldUpdaterTest.class, fieldName);
26	>	}
27	>
28	>	/**
29	>	* Construction with non-existent field throws RuntimeException
30	>	*/
31	>	public void testConstructor() {
32	>	try {
33	>	updaterFor("y");
34	>	shouldThrow();
35	>	} catch (RuntimeException success) {}
36	>	}
37	>
38	>	/**
39	>	* construction with field not of given type throws RuntimeException
40	>	*/
41	>	public void testConstructor2() {
42	>	try {
43	>	updaterFor("z");
44	>	shouldThrow();
45	>	} catch (RuntimeException success) {}
46	>	}
47	>
48	>	/**
49	>	* construction with non-volatile field throws RuntimeException
50	>	*/
51	>	public void testConstructor3() {
52	>	try {
53	>	updaterFor("w");
54	>	shouldThrow();
55	>	} catch (RuntimeException success) {}
56	>	}
57	>
58	>	/**
59	>	* get returns the last value set or assigned
60	>	*/
61	>	public void testGetSet() {
62	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
63	>	a = updaterFor("x");
64	>	x = 1;
65	>	assertEquals(1, a.get(this));
66	>	a.set(this, 2);
67	>	assertEquals(2, a.get(this));
68	>	a.set(this, -3);
69	>	assertEquals(-3, a.get(this));
70	>	}
71	>
72	>	/**
73	>	* get returns the last value lazySet by same thread
74	>	*/
75	>	public void testGetLazySet() {
76	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
77	>	a = updaterFor("x");
78	>	x = 1;
79	>	assertEquals(1, a.get(this));
80	>	a.lazySet(this, 2);
81	>	assertEquals(2, a.get(this));
82	>	a.lazySet(this, -3);
83	>	assertEquals(-3, a.get(this));
84	>	}
85	>
86	>	/**
87	>	* compareAndSet succeeds in changing value if equal to expected else fails
88	>	*/
89	>	public void testCompareAndSet() {
90	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
91	>	a = updaterFor("x");
92	>	x = 1;
93	>	assertTrue(a.compareAndSet(this, 1, 2));
94	>	assertTrue(a.compareAndSet(this, 2, -4));
95	>	assertEquals(-4, a.get(this));
96	>	assertFalse(a.compareAndSet(this, -5, 7));
97	>	assertEquals(-4, a.get(this));
98	>	assertTrue(a.compareAndSet(this, -4, 7));
99	>	assertEquals(7, a.get(this));
100	>	}
101	>
102	>	/**
103	>	* compareAndSet in one thread enables another waiting for value
104	>	* to succeed
105	>	*/
106	>	public void testCompareAndSetInMultipleThreads() throws Exception {
107	>	x = 1;
108	>	final AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
109	>	a = updaterFor("x");
110	>
111	>	Thread t = new Thread(new CheckedRunnable() {
112	>	public void realRun() {
113	>	while (!a.compareAndSet(AtomicIntegerFieldUpdaterTest.this, 2, 3))
114	>	Thread.yield();
115	>	}});
116	>
117	>	t.start();
118	>	assertTrue(a.compareAndSet(this, 1, 2));
119	>	t.join(LONG_DELAY_MS);
120	>	assertFalse(t.isAlive());
121	>	assertEquals(3, a.get(this));
122	>	}
123	>
124	>	/**
125	>	* repeated weakCompareAndSet succeeds in changing value when equal
126	>	* to expected
127	>	*/
128	>	public void testWeakCompareAndSet() {
129	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
130	>	a = updaterFor("x");
131	>	x = 1;
132	>	while (!a.weakCompareAndSet(this, 1, 2));
133	>	while (!a.weakCompareAndSet(this, 2, -4));
134	>	assertEquals(-4, a.get(this));
135	>	while (!a.weakCompareAndSet(this, -4, 7));
136	>	assertEquals(7, a.get(this));
137	>	}
138	>
139	>	/**
140	>	* getAndSet returns previous value and sets to given value
141	>	*/
142	>	public void testGetAndSet() {
143	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
144	>	a = updaterFor("x");
145	>	x = 1;
146	>	assertEquals(1, a.getAndSet(this, 0));
147	>	assertEquals(0, a.getAndSet(this, -10));
148	>	assertEquals(-10, a.getAndSet(this, 1));
149	>	}
150	>
151	>	/**
152	>	* getAndAdd returns previous value and adds given value
153	>	*/
154	>	public void testGetAndAdd() {
155	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
156	>	a = updaterFor("x");
157	>	x = 1;
158	>	assertEquals(1, a.getAndAdd(this, 2));
159	>	assertEquals(3, a.get(this));
160	>	assertEquals(3, a.getAndAdd(this, -4));
161	>	assertEquals(-1, a.get(this));
162	>	}
163	>
164	>	/**
165	>	* getAndDecrement returns previous value and decrements
166	>	*/
167	>	public void testGetAndDecrement() {
168	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
169	>	a = updaterFor("x");
170	>	x = 1;
171	>	assertEquals(1, a.getAndDecrement(this));
172	>	assertEquals(0, a.getAndDecrement(this));
173	>	assertEquals(-1, a.getAndDecrement(this));
174	>	}
175	>
176	>	/**
177	>	* getAndIncrement returns previous value and increments
178	>	*/
179	>	public void testGetAndIncrement() {
180	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
181	>	a = updaterFor("x");
182	>	x = 1;
183	>	assertEquals(1, a.getAndIncrement(this));
184	>	assertEquals(2, a.get(this));
185	>	a.set(this, -2);
186	>	assertEquals(-2, a.getAndIncrement(this));
187	>	assertEquals(-1, a.getAndIncrement(this));
188	>	assertEquals(0, a.getAndIncrement(this));
189	>	assertEquals(1, a.get(this));
190	>	}
191	>
192	>	/**
193	>	* addAndGet adds given value to current, and returns current value
194	>	*/
195	>	public void testAddAndGet() {
196	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
197	>	a = updaterFor("x");
198	>	x = 1;
199	>	assertEquals(3, a.addAndGet(this, 2));
200	>	assertEquals(3, a.get(this));
201	>	assertEquals(-1, a.addAndGet(this, -4));
202	>	assertEquals(-1, a.get(this));
203	>	}
204	>
205	>	/**
206	>	* decrementAndGet decrements and returns current value
207	>	*/
208	>	public void testDecrementAndGet() {
209	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
210	>	a = updaterFor("x");
211	>	x = 1;
212	>	assertEquals(0, a.decrementAndGet(this));
213	>	assertEquals(-1, a.decrementAndGet(this));
214	>	assertEquals(-2, a.decrementAndGet(this));
215	>	assertEquals(-2, a.get(this));
216	>	}
217	>
218	>	/**
219	>	* incrementAndGet increments and returns current value
220	>	*/
221	>	public void testIncrementAndGet() {
222	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
223	>	a = updaterFor("x");
224	>	x = 1;
225	>	assertEquals(2, a.incrementAndGet(this));
226	>	assertEquals(2, a.get(this));
227	>	a.set(this, -2);
228	>	assertEquals(-1, a.incrementAndGet(this));
229	>	assertEquals(0, a.incrementAndGet(this));
230	>	assertEquals(1, a.incrementAndGet(this));
231	>	assertEquals(1, a.get(this));
232		}
233
234		}

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