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Comparing jsr166/src/test/tck/AtomicReferenceFieldUpdaterTest.java (file contents):
Revision 1.2 by dl, Sun Sep 14 20:42:40 2003 UTC vs.
Revision 1.13 by jsr166, Mon Nov 16 05:30:07 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.*;
10		import junit.framework.*;
11		import java.util.*;
12
13	<	public class AtomicReferenceFieldUpdaterTest extends JSR166TestCase{
13	>	public class AtomicReferenceFieldUpdaterTest extends JSR166TestCase {
14		volatile Integer x = null;
15		Object z;
16		Integer 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(AtomicReferenceFieldUpdaterTest.class);
23		}
24
25	<	public void testConstructor(){
26	<	try{
25	>	/**
26	>	* Construction with non-existent field throws RuntimeException
27	>	*/
28	>	public void testConstructor() {
29	>	try {
30		AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>
31		a = AtomicReferenceFieldUpdater.newUpdater
32	<	(getClass(), Integer.class, "y");
33	<	fail("Exception not thrown");
32	>	(AtomicReferenceFieldUpdaterTest.class, Integer.class, "y");
33	>	shouldThrow();
34		}
33	–
35		catch (RuntimeException rt) {}
36		}
37
38
39	<	public void testConstructor2(){
40	<	try{
39	>	/**
40	>	* construction with field not of given type throws RuntimeException
41	>	*/
42	>	public void testConstructor2() {
43	>	try {
44		AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>
45		a = AtomicReferenceFieldUpdater.newUpdater
46	<	(getClass(), Integer.class, "z");
47	<	fail("Exception not thrown");
46	>	(AtomicReferenceFieldUpdaterTest.class, Integer.class, "z");
47	>	shouldThrow();
48		}
45	–
49		catch (RuntimeException rt) {}
50		}
51
52	<	public void testConstructor3(){
53	<	try{
52	>	/**
53	>	* Constructor with non-volatile field throws exception
54	>	*/
55	>	public void testConstructor3() {
56	>	try {
57		AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>
58		a = AtomicReferenceFieldUpdater.newUpdater
59	<	(getClass(), Integer.class, "w");
60	<	fail("Exception not thrown");
59	>	(AtomicReferenceFieldUpdaterTest.class, Integer.class, "w");
60	>	shouldThrow();
61		}
56	–
62		catch (RuntimeException rt) {}
63		}
64
65	<	public void testGetSet(){
66	<	AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a = AtomicReferenceFieldUpdater.newUpdater(getClass(), Integer.class, "x");
65	>	/**
66	>	*  get returns the last value set or assigned
67	>	*/
68	>	public void testGetSet() {
69	>	AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a;
70	>	try {
71	>	a = AtomicReferenceFieldUpdater.newUpdater(AtomicReferenceFieldUpdaterTest.class, Integer.class, "x");
72	>	} catch (RuntimeException ok) {
73	>	return;
74	>	}
75		x = one;
76		assertEquals(one,a.get(this));
77		a.set(this,two);
78		assertEquals(two,a.get(this));
79	<	a.set(this,-3);
80	<	assertEquals(-3,a.get(this));
81	<
79	>	a.set(this,m3);
80	>	assertEquals(m3,a.get(this));
81	>	}
82	>
83	>	/**
84	>	*  get returns the last value lazySet by same thread
85	>	*/
86	>	public void testGetLazySet() {
87	>	AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a;
88	>	try {
89	>	a = AtomicReferenceFieldUpdater.newUpdater(AtomicReferenceFieldUpdaterTest.class, Integer.class, "x");
90	>	} catch (RuntimeException ok) {
91	>	return;
92	>	}
93	>	x = one;
94	>	assertEquals(one,a.get(this));
95	>	a.lazySet(this,two);
96	>	assertEquals(two,a.get(this));
97	>	a.lazySet(this,m3);
98	>	assertEquals(m3,a.get(this));
99		}
100	<	public void testCompareAndSet(){
101	<	AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a = AtomicReferenceFieldUpdater.newUpdater(getClass(), Integer.class, "x");
100	>
101	>	/**
102	>	* compareAndSet succeeds in changing value if equal to expected else fails
103	>	*/
104	>	public void testCompareAndSet() {
105	>	AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a;
106	>	try {
107	>	a = AtomicReferenceFieldUpdater.newUpdater(AtomicReferenceFieldUpdaterTest.class, Integer.class, "x");
108	>	} catch (RuntimeException ok) {
109	>	return;
110	>	}
111		x = one;
112		assertTrue(a.compareAndSet(this,one,two));
113		assertTrue(a.compareAndSet(this,two,m4));
#	Line 79 | Line 118 | public class AtomicReferenceFieldUpdater
118		assertEquals(seven,a.get(this));
119		}
120
121	<	public void testWeakCompareAndSet(){
122	<	AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a = AtomicReferenceFieldUpdater.newUpdater(getClass(), Integer.class, "x");
121	>	/**
122	>	* compareAndSet in one thread enables another waiting for value
123	>	* to succeed
124	>	*/
125	>	public void testCompareAndSetInMultipleThreads() {
126		x = one;
127	<	while(!a.weakCompareAndSet(this,one,two));
128	<	while(!a.weakCompareAndSet(this,two,m4));
127	>	final AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a;
128	>	try {
129	>	a = AtomicReferenceFieldUpdater.newUpdater(AtomicReferenceFieldUpdaterTest.class, Integer.class, "x");
130	>	} catch (RuntimeException ok) {
131	>	return;
132	>	}
133	>
134	>	Thread t = new Thread(new Runnable() {
135	>	public void run() {
136	>	while (!a.compareAndSet(AtomicReferenceFieldUpdaterTest.this, two, three)) Thread.yield();
137	>	}});
138	>	try {
139	>	t.start();
140	>	assertTrue(a.compareAndSet(this, one, two));
141	>	t.join(LONG_DELAY_MS);
142	>	assertFalse(t.isAlive());
143	>	assertEquals(a.get(this), three);
144	>	}
145	>	catch (Exception e) {
146	>	unexpectedException();
147	>	}
148	>	}
149	>
150	>	/**
151	>	* repeated weakCompareAndSet succeeds in changing value when equal
152	>	* to expected
153	>	*/
154	>	public void testWeakCompareAndSet() {
155	>	AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a;
156	>	try {
157	>	a = AtomicReferenceFieldUpdater.newUpdater(AtomicReferenceFieldUpdaterTest.class, Integer.class, "x");
158	>	} catch (RuntimeException ok) {
159	>	return;
160	>	}
161	>	x = one;
162	>	while (!a.weakCompareAndSet(this,one,two));
163	>	while (!a.weakCompareAndSet(this,two,m4));
164		assertEquals(m4,a.get(this));
165	<	while(!a.weakCompareAndSet(this,m4,seven));
165	>	while (!a.weakCompareAndSet(this,m4,seven));
166		assertEquals(seven,a.get(this));
167		}
168
169	<	public void testGetAndSet(){
170	<	AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a = AtomicReferenceFieldUpdater.newUpdater(getClass(), Integer.class, "x");
169	>	/**
170	>	* getAndSet returns previous value and sets to given value
171	>	*/
172	>	public void testGetAndSet() {
173	>	AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a;
174	>	try {
175	>	a = AtomicReferenceFieldUpdater.newUpdater(AtomicReferenceFieldUpdaterTest.class, Integer.class, "x");
176	>	} catch (RuntimeException ok) {
177	>	return;
178	>	}
179		x = one;
180		assertEquals(one,a.getAndSet(this, zero));
181		assertEquals(zero,a.getAndSet(this,m10));

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