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Comparing jsr166/src/test/tck/AtomicReferenceFieldUpdaterTest.java (file contents):
Revision 1.9 by dl, Tue Dec 28 16:15:59 2004 UTC vs.
Revision 1.18 by jsr166, Tue Dec 1 09:56:28 2009 UTC

#	Line 2 | Line 2
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.
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		}
21		public static Test suite() {
#	Line 25 | Line 25 | public class AtomicReferenceFieldUpdater
25		/**
26		* Construction with non-existent field throws RuntimeException
27		*/
28	<	public void testConstructor(){
29	<	try{
28	>	public void testConstructor() {
29	>	try {
30		AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>
31		a = AtomicReferenceFieldUpdater.newUpdater
32		(AtomicReferenceFieldUpdaterTest.class, Integer.class, "y");
33		shouldThrow();
34	<	}
35	<	catch (RuntimeException rt) {}
34	>	} catch (RuntimeException success) {}
35		}
36
37
38		/**
39		* construction with field not of given type throws RuntimeException
40		*/
41	<	public void testConstructor2(){
42	<	try{
41	>	public void testConstructor2() {
42	>	try {
43		AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>
44		a = AtomicReferenceFieldUpdater.newUpdater
45		(AtomicReferenceFieldUpdaterTest.class, Integer.class, "z");
46		shouldThrow();
47	<	}
49	<	catch (RuntimeException rt) {}
47	>	} catch (RuntimeException success) {}
48		}
49
50		/**
51		* Constructor with non-volatile field throws exception
52		*/
53	<	public void testConstructor3(){
54	<	try{
53	>	public void testConstructor3() {
54	>	try {
55		AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>
56		a = AtomicReferenceFieldUpdater.newUpdater
57		(AtomicReferenceFieldUpdaterTest.class, Integer.class, "w");
58		shouldThrow();
59	<	}
62	<	catch (RuntimeException rt) {}
59	>	} catch (RuntimeException success) {}
60		}
61
62		/**
63		*  get returns the last value set or assigned
64		*/
65	<	public void testGetSet(){
65	>	public void testGetSet() {
66	>	AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a;
67	>	try {
68	>	a = AtomicReferenceFieldUpdater.newUpdater(AtomicReferenceFieldUpdaterTest.class, Integer.class, "x");
69	>	} catch (RuntimeException ok) {
70	>	return;
71	>	}
72	>	x = one;
73	>	assertSame(one,a.get(this));
74	>	a.set(this,two);
75	>	assertSame(two,a.get(this));
76	>	a.set(this,m3);
77	>	assertSame(m3,a.get(this));
78	>	}
79	>
80	>	/**
81	>	*  get returns the last value lazySet by same thread
82	>	*/
83	>	public void testGetLazySet() {
84		AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a;
85		try {
86		a = AtomicReferenceFieldUpdater.newUpdater(AtomicReferenceFieldUpdaterTest.class, Integer.class, "x");
#	Line 73 | Line 88 | public class AtomicReferenceFieldUpdater
88		return;
89		}
90		x = one;
91	<	assertEquals(one,a.get(this));
92	<	a.set(this,two);
93	<	assertEquals(two,a.get(this));
94	<	a.set(this,m3);
95	<	assertEquals(m3,a.get(this));
81	<
91	>	assertSame(one,a.get(this));
92	>	a.lazySet(this,two);
93	>	assertSame(two,a.get(this));
94	>	a.lazySet(this,m3);
95	>	assertSame(m3,a.get(this));
96		}
97	+
98		/**
99		* compareAndSet succeeds in changing value if equal to expected else fails
100		*/
101	<	public void testCompareAndSet(){
101	>	public void testCompareAndSet() {
102		AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a;
103		try {
104		a = AtomicReferenceFieldUpdater.newUpdater(AtomicReferenceFieldUpdaterTest.class, Integer.class, "x");
#	Line 91 | Line 106 | public class AtomicReferenceFieldUpdater
106		return;
107		}
108		x = one;
109	<	assertTrue(a.compareAndSet(this,one,two));
110	<	assertTrue(a.compareAndSet(this,two,m4));
111	<	assertEquals(m4,a.get(this));
112	<	assertFalse(a.compareAndSet(this,m5,seven));
113	<	assertFalse((seven == a.get(this)));
114	<	assertTrue(a.compareAndSet(this,m4,seven));
115	<	assertEquals(seven,a.get(this));
109	>	assertTrue(a.compareAndSet(this,one,two));
110	>	assertTrue(a.compareAndSet(this,two,m4));
111	>	assertSame(m4,a.get(this));
112	>	assertFalse(a.compareAndSet(this,m5,seven));
113	>	assertFalse(seven == a.get(this));
114	>	assertTrue(a.compareAndSet(this,m4,seven));
115	>	assertSame(seven,a.get(this));
116		}
117
118		/**
119		* compareAndSet in one thread enables another waiting for value
120		* to succeed
121		*/
122	<	public void testCompareAndSetInMultipleThreads() {
122	>	public void testCompareAndSetInMultipleThreads() throws Exception {
123		x = one;
124		final AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a;
125		try {
#	Line 113 | Line 128 | public class AtomicReferenceFieldUpdater
128		return;
129		}
130
131	<	Thread t = new Thread(new Runnable() {
132	<	public void run() {
133	<	while(!a.compareAndSet(AtomicReferenceFieldUpdaterTest.this, two, three)) Thread.yield();
134	<	}});
135	<	try {
136	<	t.start();
137	<	assertTrue(a.compareAndSet(this, one, two));
138	<	t.join(LONG_DELAY_MS);
139	<	assertFalse(t.isAlive());
140	<	assertEquals(a.get(this), three);
141	<	}
127	<	catch(Exception e) {
128	<	unexpectedException();
129	<	}
131	>	Thread t = new Thread(new CheckedRunnable() {
132	>	public void realRun() {
133	>	while (!a.compareAndSet(AtomicReferenceFieldUpdaterTest.this, two, three))
134	>	Thread.yield();
135	>	}});
136	>
137	>	t.start();
138	>	assertTrue(a.compareAndSet(this, one, two));
139	>	t.join(LONG_DELAY_MS);
140	>	assertFalse(t.isAlive());
141	>	assertSame(a.get(this), three);
142		}
143
144		/**
145		* repeated weakCompareAndSet succeeds in changing value when equal
146	<	* to expected
146	>	* to expected
147		*/
148	<	public void testWeakCompareAndSet(){
148	>	public void testWeakCompareAndSet() {
149		AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a;
150		try {
151		a = AtomicReferenceFieldUpdater.newUpdater(AtomicReferenceFieldUpdaterTest.class, Integer.class, "x");
#	Line 141 | Line 153 | public class AtomicReferenceFieldUpdater
153		return;
154		}
155		x = one;
156	<	while(!a.weakCompareAndSet(this,one,two));
157	<	while(!a.weakCompareAndSet(this,two,m4));
158	<	assertEquals(m4,a.get(this));
159	<	while(!a.weakCompareAndSet(this,m4,seven));
160	<	assertEquals(seven,a.get(this));
156	>	while (!a.weakCompareAndSet(this,one,two));
157	>	while (!a.weakCompareAndSet(this,two,m4));
158	>	assertSame(m4,a.get(this));
159	>	while (!a.weakCompareAndSet(this,m4,seven));
160	>	assertSame(seven,a.get(this));
161		}
162
163		/**
164		* getAndSet returns previous value and sets to given value
165		*/
166	<	public void testGetAndSet(){
166	>	public void testGetAndSet() {
167		AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a;
168		try {
169		a = AtomicReferenceFieldUpdater.newUpdater(AtomicReferenceFieldUpdaterTest.class, Integer.class, "x");
#	Line 159 | Line 171 | public class AtomicReferenceFieldUpdater
171		return;
172		}
173		x = one;
174	<	assertEquals(one,a.getAndSet(this, zero));
175	<	assertEquals(zero,a.getAndSet(this,m10));
176	<	assertEquals(m10,a.getAndSet(this,1));
174	>	assertSame(one,a.getAndSet(this, zero));
175	>	assertSame(zero,a.getAndSet(this,m10));
176	>	assertSame(m10,a.getAndSet(this,1));
177		}
178
179		}

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