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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 1.32 by jsr166, Wed Dec 31 21:50:25 2014 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
9	<	import java.util.concurrent.atomic.*;
9	<	import junit.framework.*;
10	<	import java.util.*;
9	>	import java.util.concurrent.atomic.AtomicReferenceFieldUpdater;
10
11	<	public class AtomicReferenceFieldUpdaterTest extends JSR166TestCase{
11	>	import junit.framework.Test;
12	>	import junit.framework.TestSuite;
13	>
14	>	public class AtomicReferenceFieldUpdaterTest extends JSR166TestCase {
15		volatile Integer x = null;
16		Object z;
17		Integer w;
18	+	volatile int i;
19
20	<	public static void main(String[] args){
20	>	public static void main(String[] args) {
21		junit.textui.TestRunner.run(suite());
22		}
20	–
21	–
23		public static Test suite() {
24		return new TestSuite(AtomicReferenceFieldUpdaterTest.class);
25		}
26
27	<	public void testConstructor(){
28	<	try{
29	<	AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>
29	<	a = AtomicReferenceFieldUpdater.newUpdater
30	<	(getClass(), Integer.class, "y");
31	<	fail("Exception not thrown");
32	<	}
33	<
34	<	catch (RuntimeException rt) {}
27	>	AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer> updaterFor(String fieldName) {
28	>	return AtomicReferenceFieldUpdater.newUpdater
29	>	(AtomicReferenceFieldUpdaterTest.class, Integer.class, fieldName);
30		}
31
32	<
33	<	public void testConstructor2(){
34	<	try{
35	<	AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>
36	<	a = AtomicReferenceFieldUpdater.newUpdater
37	<	(getClass(), Integer.class, "z");
38	<	fail("Exception not thrown");
32	>	/**
33	>	* Construction with non-existent field throws RuntimeException
34	>	*/
35	>	public void testConstructor() {
36	>	try {
37	>	updaterFor("y");
38	>	shouldThrow();
39	>	} catch (RuntimeException success) {
40	>	assertNotNull(success.getCause());
41		}
45	–
46	–	catch (RuntimeException rt) {}
42		}
43
44	<	public void testConstructor3(){
45	<	try{
46	<	AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>
47	<	a = AtomicReferenceFieldUpdater.newUpdater
48	<	(getClass(), Integer.class, "w");
49	<	fail("Exception not thrown");
50	<	}
51	<
52	<	catch (RuntimeException rt) {}
44	>	/**
45	>	* construction with field not of given type throws ClassCastException
46	>	*/
47	>	public void testConstructor2() {
48	>	try {
49	>	updaterFor("z");
50	>	shouldThrow();
51	>	} catch (ClassCastException success) {}
52	>	}
53	>
54	>	/**
55	>	* Constructor with non-volatile field throws IllegalArgumentException
56	>	*/
57	>	public void testConstructor3() {
58	>	try {
59	>	updaterFor("w");
60	>	shouldThrow();
61	>	} catch (IllegalArgumentException success) {}
62	>	}
63	>
64	>	/**
65	>	* Constructor with non-reference field throws ClassCastException
66	>	*/
67	>	public void testConstructor4() {
68	>	try {
69	>	updaterFor("i");
70	>	shouldThrow();
71	>	} catch (ClassCastException success) {}
72	>	}
73	>
74	>	/**
75	>	* get returns the last value set or assigned
76	>	*/
77	>	public void testGetSet() {
78	>	AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer> a;
79	>	a = updaterFor("x");
80	>	x = one;
81	>	assertSame(one, a.get(this));
82	>	a.set(this, two);
83	>	assertSame(two, a.get(this));
84	>	a.set(this, m3);
85	>	assertSame(m3, a.get(this));
86		}
87
88	<	public void testGetSet(){
89	<	AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a = AtomicReferenceFieldUpdater.newUpdater(getClass(), Integer.class, "x");
88	>	/**
89	>	* get returns the last value lazySet by same thread
90	>	*/
91	>	public void testGetLazySet() {
92	>	AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer> a;
93	>	a = updaterFor("x");
94		x = one;
95	<	assertEquals(one,a.get(this));
96	<	a.set(this,two);
97	<	assertEquals(two,a.get(this));
98	<	a.set(this,-3);
99	<	assertEquals(-3,a.get(this));
68	<
95	>	assertSame(one, a.get(this));
96	>	a.lazySet(this, two);
97	>	assertSame(two, a.get(this));
98	>	a.lazySet(this, m3);
99	>	assertSame(m3, a.get(this));
100		}
101	<	public void testCompareAndSet(){
102	<	AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a = AtomicReferenceFieldUpdater.newUpdater(getClass(), Integer.class, "x");
101	>
102	>	/**
103	>	* compareAndSet succeeds in changing value if equal to expected else fails
104	>	*/
105	>	public void testCompareAndSet() {
106	>	AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer> a;
107	>	a = updaterFor("x");
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	<	public void testWeakCompareAndSet(){
119	<	AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a = AtomicReferenceFieldUpdater.newUpdater(getClass(), Integer.class, "x");
118	>	/**
119	>	* compareAndSet in one thread enables another waiting for value
120	>	* to succeed
121	>	*/
122	>	public void testCompareAndSetInMultipleThreads() throws Exception {
123	>	x = one;
124	>	final AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer> a;
125	>	a = updaterFor("x");
126	>
127	>	Thread t = new Thread(new CheckedRunnable() {
128	>	public void realRun() {
129	>	while (!a.compareAndSet(AtomicReferenceFieldUpdaterTest.this, two, three))
130	>	Thread.yield();
131	>	}});
132	>
133	>	t.start();
134	>	assertTrue(a.compareAndSet(this, one, two));
135	>	t.join(LONG_DELAY_MS);
136	>	assertFalse(t.isAlive());
137	>	assertSame(three, a.get(this));
138	>	}
139	>
140	>	/**
141	>	* repeated weakCompareAndSet succeeds in changing value when equal
142	>	* to expected
143	>	*/
144	>	public void testWeakCompareAndSet() {
145	>	AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer> a;
146	>	a = updaterFor("x");
147		x = one;
148	<	while(!a.weakCompareAndSet(this,one,two));
149	<	while(!a.weakCompareAndSet(this,two,m4));
150	<	assertEquals(m4,a.get(this));
151	<	while(!a.weakCompareAndSet(this,m4,seven));
152	<	assertEquals(seven,a.get(this));
148	>	do {} while (!a.weakCompareAndSet(this, one, two));
149	>	do {} while (!a.weakCompareAndSet(this, two, m4));
150	>	assertSame(m4, a.get(this));
151	>	do {} while (!a.weakCompareAndSet(this, m4, seven));
152	>	assertSame(seven, a.get(this));
153		}
154
155	<	public void testGetAndSet(){
156	<	AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a = AtomicReferenceFieldUpdater.newUpdater(getClass(), Integer.class, "x");
155	>	/**
156	>	* getAndSet returns previous value and sets to given value
157	>	*/
158	>	public void testGetAndSet() {
159	>	AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer> a;
160	>	a = updaterFor("x");
161		x = one;
162	<	assertEquals(one,a.getAndSet(this, zero));
163	<	assertEquals(zero,a.getAndSet(this,m10));
164	<	assertEquals(m10,a.getAndSet(this,1));
162	>	assertSame(one, a.getAndSet(this, zero));
163	>	assertSame(zero, a.getAndSet(this, m10));
164	>	assertSame(m10, a.getAndSet(this, 1));
165		}
166
167		}

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