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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 1.27 by jsr166, Tue Apr 2 04:11:28 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.AtomicReferenceFieldUpdater;
11
12	<	public class AtomicReferenceFieldUpdaterTest extends JSR166TestCase{
12	>	public class AtomicReferenceFieldUpdaterTest extends JSR166TestCase {
13		volatile Integer x = null;
14		Object z;
15		Integer 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(AtomicReferenceFieldUpdaterTest.class);
22		}
23
24	<	public void testConstructor(){
25	<	try{
26	<	AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>
29	<	a = AtomicReferenceFieldUpdater.newUpdater
30	<	(getClass(), Integer.class, "y");
31	<	fail("Exception not thrown");
32	<	}
33	<
34	<	catch (RuntimeException rt) {}
24	>	AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer> updaterFor(String fieldName) {
25	>	return AtomicReferenceFieldUpdater.newUpdater
26	>	(AtomicReferenceFieldUpdaterTest.class, Integer.class, fieldName);
27		}
28
29	<
30	<	public void testConstructor2(){
31	<	try{
32	<	AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>
33	<	a = AtomicReferenceFieldUpdater.newUpdater
34	<	(getClass(), Integer.class, "z");
35	<	fail("Exception not thrown");
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	>	assertTrue(success.getCause() != null);
38		}
45	–
46	–	catch (RuntimeException rt) {}
39		}
40
41	<	public void testConstructor3(){
42	<	try{
43	<	AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>
44	<	a = AtomicReferenceFieldUpdater.newUpdater
45	<	(getClass(), Integer.class, "w");
46	<	fail("Exception not thrown");
47	<	}
48	<
49	<	catch (RuntimeException rt) {}
41	>	/**
42	>	* construction with field not of given type throws RuntimeException
43	>	*/
44	>	public void testConstructor2() {
45	>	try {
46	>	updaterFor("z");
47	>	shouldThrow();
48	>	} catch (RuntimeException success) {}
49	>	}
50	>
51	>	/**
52	>	* Constructor with non-volatile field throws IllegalArgumentException
53	>	*/
54	>	public void testConstructor3() {
55	>	try {
56	>	updaterFor("w");
57	>	shouldThrow();
58	>	} catch (IllegalArgumentException success) {}
59	>	}
60	>
61	>	/**
62	>	* get returns the last value set or assigned
63	>	*/
64	>	public void testGetSet() {
65	>	AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a;
66	>	a = updaterFor("x");
67	>	x = one;
68	>	assertSame(one, a.get(this));
69	>	a.set(this, two);
70	>	assertSame(two, a.get(this));
71	>	a.set(this, m3);
72	>	assertSame(m3, a.get(this));
73		}
74
75	<	public void testGetSet(){
76	<	AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a = AtomicReferenceFieldUpdater.newUpdater(getClass(), Integer.class, "x");
75	>	/**
76	>	* get returns the last value lazySet by same thread
77	>	*/
78	>	public void testGetLazySet() {
79	>	AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a;
80	>	a = updaterFor("x");
81		x = one;
82	<	assertEquals(one,a.get(this));
83	<	a.set(this,two);
84	<	assertEquals(two,a.get(this));
85	<	a.set(this,-3);
86	<	assertEquals(-3,a.get(this));
68	<
82	>	assertSame(one, a.get(this));
83	>	a.lazySet(this, two);
84	>	assertSame(two, a.get(this));
85	>	a.lazySet(this, m3);
86	>	assertSame(m3, a.get(this));
87		}
88	<	public void testCompareAndSet(){
89	<	AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a = AtomicReferenceFieldUpdater.newUpdater(getClass(), Integer.class, "x");
88	>
89	>	/**
90	>	* compareAndSet succeeds in changing value if equal to expected else fails
91	>	*/
92	>	public void testCompareAndSet() {
93	>	AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a;
94	>	a = updaterFor("x");
95		x = one;
96	<	assertTrue(a.compareAndSet(this,one,two));
97	<	assertTrue(a.compareAndSet(this,two,m4));
98	<	assertEquals(m4,a.get(this));
99	<	assertFalse(a.compareAndSet(this,m5,seven));
100	<	assertFalse((seven == a.get(this)));
101	<	assertTrue(a.compareAndSet(this,m4,seven));
102	<	assertEquals(seven,a.get(this));
96	>	assertTrue(a.compareAndSet(this, one, two));
97	>	assertTrue(a.compareAndSet(this, two, m4));
98	>	assertSame(m4, a.get(this));
99	>	assertFalse(a.compareAndSet(this, m5, seven));
100	>	assertFalse(seven == a.get(this));
101	>	assertTrue(a.compareAndSet(this, m4, seven));
102	>	assertSame(seven, a.get(this));
103		}
104
105	<	public void testWeakCompareAndSet(){
106	<	AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a = AtomicReferenceFieldUpdater.newUpdater(getClass(), Integer.class, "x");
105	>	/**
106	>	* compareAndSet in one thread enables another waiting for value
107	>	* to succeed
108	>	*/
109	>	public void testCompareAndSetInMultipleThreads() throws Exception {
110	>	x = one;
111	>	final AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a;
112	>	a = updaterFor("x");
113	>
114	>	Thread t = new Thread(new CheckedRunnable() {
115	>	public void realRun() {
116	>	while (!a.compareAndSet(AtomicReferenceFieldUpdaterTest.this, two, three))
117	>	Thread.yield();
118	>	}});
119	>
120	>	t.start();
121	>	assertTrue(a.compareAndSet(this, one, two));
122	>	t.join(LONG_DELAY_MS);
123	>	assertFalse(t.isAlive());
124	>	assertSame(three, a.get(this));
125	>	}
126	>
127	>	/**
128	>	* repeated weakCompareAndSet succeeds in changing value when equal
129	>	* to expected
130	>	*/
131	>	public void testWeakCompareAndSet() {
132	>	AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a;
133	>	a = updaterFor("x");
134		x = one;
135	<	while(!a.weakCompareAndSet(this,one,two));
136	<	while(!a.weakCompareAndSet(this,two,m4));
137	<	assertEquals(m4,a.get(this));
138	<	while(!a.weakCompareAndSet(this,m4,seven));
139	<	assertEquals(seven,a.get(this));
135	>	while (!a.weakCompareAndSet(this, one, two));
136	>	while (!a.weakCompareAndSet(this, two, m4));
137	>	assertSame(m4, a.get(this));
138	>	while (!a.weakCompareAndSet(this, m4, seven));
139	>	assertSame(seven, a.get(this));
140		}
141
142	<	public void testGetAndSet(){
143	<	AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a = AtomicReferenceFieldUpdater.newUpdater(getClass(), Integer.class, "x");
142	>	/**
143	>	* getAndSet returns previous value and sets to given value
144	>	*/
145	>	public void testGetAndSet() {
146	>	AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a;
147	>	a = updaterFor("x");
148		x = one;
149	<	assertEquals(one,a.getAndSet(this, zero));
150	<	assertEquals(zero,a.getAndSet(this,m10));
151	<	assertEquals(m10,a.getAndSet(this,1));
149	>	assertSame(one, a.getAndSet(this, zero));
150	>	assertSame(zero, a.getAndSet(this, m10));
151	>	assertSame(m10, a.getAndSet(this, 1));
152		}
153
154		}

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