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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 1.28 by jsr166, Tue Apr 2 16:14:39 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	+	volatile int i;
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{
27	<	AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>
29	<	a = AtomicReferenceFieldUpdater.newUpdater
30	<	(getClass(), Integer.class, "y");
31	<	fail("Exception not thrown");
32	<	}
33	<
34	<	catch (RuntimeException rt) {}
25	>	AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer> updaterFor(String fieldName) {
26	>	return AtomicReferenceFieldUpdater.newUpdater
27	>	(AtomicReferenceFieldUpdaterTest.class, Integer.class, fieldName);
28		}
29
30	<
31	<	public void testConstructor2(){
32	<	try{
33	<	AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>
34	<	a = AtomicReferenceFieldUpdater.newUpdater
35	<	(getClass(), Integer.class, "z");
36	<	fail("Exception not thrown");
30	>	/**
31	>	* Construction with non-existent field throws RuntimeException
32	>	*/
33	>	public void testConstructor() {
34	>	try {
35	>	updaterFor("y");
36	>	shouldThrow();
37	>	} catch (RuntimeException success) {
38	>	assertTrue(success.getCause() != null);
39		}
45	–
46	–	catch (RuntimeException rt) {}
40		}
41
42	<	public void testConstructor3(){
43	<	try{
44	<	AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>
45	<	a = AtomicReferenceFieldUpdater.newUpdater
46	<	(getClass(), Integer.class, "w");
47	<	fail("Exception not thrown");
48	<	}
49	<
50	<	catch (RuntimeException rt) {}
42	>	/**
43	>	* construction with field not of given type throws ClassCastException
44	>	*/
45	>	public void testConstructor2() {
46	>	try {
47	>	updaterFor("z");
48	>	shouldThrow();
49	>	} catch (ClassCastException success) {}
50	>	}
51	>
52	>	/**
53	>	* Constructor with non-volatile field throws IllegalArgumentException
54	>	*/
55	>	public void testConstructor3() {
56	>	try {
57	>	updaterFor("w");
58	>	shouldThrow();
59	>	} catch (IllegalArgumentException success) {}
60	>	}
61	>
62	>	/**
63	>	* Constructor with non-reference field throws ClassCastException
64	>	*/
65	>	public void testConstructor4() {
66	>	try {
67	>	updaterFor("i");
68	>	shouldThrow();
69	>	} catch (ClassCastException success) {}
70	>	}
71	>
72	>	/**
73	>	* get returns the last value set or assigned
74	>	*/
75	>	public void testGetSet() {
76	>	AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a;
77	>	a = updaterFor("x");
78	>	x = one;
79	>	assertSame(one, a.get(this));
80	>	a.set(this, two);
81	>	assertSame(two, a.get(this));
82	>	a.set(this, m3);
83	>	assertSame(m3, a.get(this));
84		}
85
86	<	public void testGetSet(){
87	<	AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a = AtomicReferenceFieldUpdater.newUpdater(getClass(), Integer.class, "x");
86	>	/**
87	>	* get returns the last value lazySet by same thread
88	>	*/
89	>	public void testGetLazySet() {
90	>	AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a;
91	>	a = updaterFor("x");
92		x = one;
93	<	assertEquals(one,a.get(this));
94	<	a.set(this,two);
95	<	assertEquals(two,a.get(this));
96	<	a.set(this,-3);
97	<	assertEquals(-3,a.get(this));
68	<
93	>	assertSame(one, a.get(this));
94	>	a.lazySet(this, two);
95	>	assertSame(two, a.get(this));
96	>	a.lazySet(this, m3);
97	>	assertSame(m3, a.get(this));
98		}
99	<	public void testCompareAndSet(){
100	<	AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a = AtomicReferenceFieldUpdater.newUpdater(getClass(), Integer.class, "x");
99	>
100	>	/**
101	>	* compareAndSet succeeds in changing value if equal to expected else fails
102	>	*/
103	>	public void testCompareAndSet() {
104	>	AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a;
105	>	a = updaterFor("x");
106		x = one;
107	<	assertTrue(a.compareAndSet(this,one,two));
108	<	assertTrue(a.compareAndSet(this,two,m4));
109	<	assertEquals(m4,a.get(this));
110	<	assertFalse(a.compareAndSet(this,m5,seven));
111	<	assertFalse((seven == a.get(this)));
112	<	assertTrue(a.compareAndSet(this,m4,seven));
113	<	assertEquals(seven,a.get(this));
107	>	assertTrue(a.compareAndSet(this, one, two));
108	>	assertTrue(a.compareAndSet(this, two, m4));
109	>	assertSame(m4, a.get(this));
110	>	assertFalse(a.compareAndSet(this, m5, seven));
111	>	assertFalse(seven == a.get(this));
112	>	assertTrue(a.compareAndSet(this, m4, seven));
113	>	assertSame(seven, a.get(this));
114		}
115
116	<	public void testWeakCompareAndSet(){
117	<	AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a = AtomicReferenceFieldUpdater.newUpdater(getClass(), Integer.class, "x");
116	>	/**
117	>	* compareAndSet in one thread enables another waiting for value
118	>	* to succeed
119	>	*/
120	>	public void testCompareAndSetInMultipleThreads() throws Exception {
121	>	x = one;
122	>	final AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a;
123	>	a = updaterFor("x");
124	>
125	>	Thread t = new Thread(new CheckedRunnable() {
126	>	public void realRun() {
127	>	while (!a.compareAndSet(AtomicReferenceFieldUpdaterTest.this, two, three))
128	>	Thread.yield();
129	>	}});
130	>
131	>	t.start();
132	>	assertTrue(a.compareAndSet(this, one, two));
133	>	t.join(LONG_DELAY_MS);
134	>	assertFalse(t.isAlive());
135	>	assertSame(three, a.get(this));
136	>	}
137	>
138	>	/**
139	>	* repeated weakCompareAndSet succeeds in changing value when equal
140	>	* to expected
141	>	*/
142	>	public void testWeakCompareAndSet() {
143	>	AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a;
144	>	a = updaterFor("x");
145		x = one;
146	<	while(!a.weakCompareAndSet(this,one,two));
147	<	while(!a.weakCompareAndSet(this,two,m4));
148	<	assertEquals(m4,a.get(this));
149	<	while(!a.weakCompareAndSet(this,m4,seven));
150	<	assertEquals(seven,a.get(this));
146	>	while (!a.weakCompareAndSet(this, one, two));
147	>	while (!a.weakCompareAndSet(this, two, m4));
148	>	assertSame(m4, a.get(this));
149	>	while (!a.weakCompareAndSet(this, m4, seven));
150	>	assertSame(seven, a.get(this));
151		}
152
153	<	public void testGetAndSet(){
154	<	AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a = AtomicReferenceFieldUpdater.newUpdater(getClass(), Integer.class, "x");
153	>	/**
154	>	* getAndSet returns previous value and sets to given value
155	>	*/
156	>	public void testGetAndSet() {
157	>	AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a;
158	>	a = updaterFor("x");
159		x = one;
160	<	assertEquals(one,a.getAndSet(this, zero));
161	<	assertEquals(zero,a.getAndSet(this,m10));
162	<	assertEquals(m10,a.getAndSet(this,1));
160	>	assertSame(one, a.getAndSet(this, zero));
161	>	assertSame(zero, a.getAndSet(this, m10));
162	>	assertSame(m10, a.getAndSet(this, 1));
163		}
164
165		}

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