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root/jsr166/jsr166/src/test/tck/AtomicReferenceTest.java

Comparing jsr166/src/test/tck/AtomicReferenceTest.java (file contents):
Revision 1.1 by dl, Sun Aug 31 19:24:53 2003 UTC vs.
Revision 1.14 by jsr166, Sat Nov 21 02:07:26 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 junit.framework.*;
10		import java.util.concurrent.atomic.*;
11	+	import java.io.*;
12
13	<	public class AtomicReferenceTest extends TestCase {
13	>	public class AtomicReferenceTest extends JSR166TestCase {
14		public static void main (String[] args) {
15		junit.textui.TestRunner.run (suite());
16		}
#	Line 16 | Line 18 | public class AtomicReferenceTest extends
18		return new TestSuite(AtomicReferenceTest.class);
19		}
20
21	<	static final Integer zero = new Integer(0);
22	<	static final Integer one = new Integer(1);
23	<	static final Integer two = new Integer(2);
24	<	static final Integer m3  = new Integer(-3);
23	<	static final Integer m4 = new Integer(-4);
24	<	static final Integer m5 = new Integer(-5);
25	<	static final Integer seven = new Integer(7);
26	<	static final Integer m10 = new Integer(-10);
27	<
28	<	public void testConstructor(){
21	>	/**
22	>	* constructor initializes to given value
23	>	*/
24	>	public void testConstructor() {
25		AtomicReference ai = new AtomicReference(one);
26	<	assertEquals(one,ai.get());
26	>	assertEquals(one,ai.get());
27		}
28
29	<	public void testConstructor2(){
29	>	/**
30	>	* default constructed initializes to null
31	>	*/
32	>	public void testConstructor2() {
33		AtomicReference ai = new AtomicReference();
34	<	assertNull(ai.get());
34	>	assertNull(ai.get());
35		}
36
37	<	public void testGetSet(){
37	>	/**
38	>	* get returns the last value set
39	>	*/
40	>	public void testGetSet() {
41		AtomicReference ai = new AtomicReference(one);
42	<	assertEquals(one,ai.get());
43	<	ai.set(two);
44	<	assertEquals(two,ai.get());
45	<	ai.set(m3);
46	<	assertEquals(m3,ai.get());
45	<
42	>	assertEquals(one,ai.get());
43	>	ai.set(two);
44	>	assertEquals(two,ai.get());
45	>	ai.set(m3);
46	>	assertEquals(m3,ai.get());
47		}
48	<	public void testCompareAndSet(){
48	>
49	>	/**
50	>	* get returns the last value lazySet in same thread
51	>	*/
52	>	public void testGetLazySet() {
53		AtomicReference ai = new AtomicReference(one);
54	<	assertTrue(ai.compareAndSet(one,two));
55	<	assertTrue(ai.compareAndSet(two,m4));
56	<	assertEquals(m4,ai.get());
57	<	assertFalse(ai.compareAndSet(m5,seven));
58	<	assertFalse((seven.equals(ai.get())));
54	<	assertTrue(ai.compareAndSet(m4,seven));
55	<	assertEquals(seven,ai.get());
54	>	assertEquals(one,ai.get());
55	>	ai.lazySet(two);
56	>	assertEquals(two,ai.get());
57	>	ai.lazySet(m3);
58	>	assertEquals(m3,ai.get());
59		}
60
61	<	public void testWeakCompareAndSet(){
61	>	/**
62	>	* compareAndSet succeeds in changing value if equal to expected else fails
63	>	*/
64	>	public void testCompareAndSet() {
65		AtomicReference ai = new AtomicReference(one);
66	<	while(!ai.weakCompareAndSet(one,two));
67	<	while(!ai.weakCompareAndSet(two,m4));
68	<	assertEquals(m4,ai.get());
69	<	while(!ai.weakCompareAndSet(m4,seven));
70	<	assertEquals(seven,ai.get());
66	>	assertTrue(ai.compareAndSet(one,two));
67	>	assertTrue(ai.compareAndSet(two,m4));
68	>	assertEquals(m4,ai.get());
69	>	assertFalse(ai.compareAndSet(m5,seven));
70	>	assertFalse((seven.equals(ai.get())));
71	>	assertTrue(ai.compareAndSet(m4,seven));
72	>	assertEquals(seven,ai.get());
73	>	}
74	>
75	>	/**
76	>	* compareAndSet in one thread enables another waiting for value
77	>	* to succeed
78	>	*/
79	>	public void testCompareAndSetInMultipleThreads() throws Exception {
80	>	final AtomicReference ai = new AtomicReference(one);
81	>	Thread t = new Thread(new CheckedRunnable() {
82	>	public void realRun() {
83	>	while (!ai.compareAndSet(two, three))
84	>	Thread.yield();
85	>	}});
86	>
87	>	t.start();
88	>	assertTrue(ai.compareAndSet(one, two));
89	>	t.join(LONG_DELAY_MS);
90	>	assertFalse(t.isAlive());
91	>	assertEquals(ai.get(), three);
92	>	}
93	>
94	>	/**
95	>	* repeated weakCompareAndSet succeeds in changing value when equal
96	>	* to expected
97	>	*/
98	>	public void testWeakCompareAndSet() {
99	>	AtomicReference ai = new AtomicReference(one);
100	>	while (!ai.weakCompareAndSet(one,two));
101	>	while (!ai.weakCompareAndSet(two,m4));
102	>	assertEquals(m4,ai.get());
103	>	while (!ai.weakCompareAndSet(m4,seven));
104	>	assertEquals(seven,ai.get());
105		}
106
107	<	public void testGetAndSet(){
107	>	/**
108	>	* getAndSet returns previous value and sets to given value
109	>	*/
110	>	public void testGetAndSet() {
111		AtomicReference ai = new AtomicReference(one);
112	<	assertEquals(one,ai.getAndSet(zero));
113	<	assertEquals(zero,ai.getAndSet(m10));
114	<	assertEquals(m10,ai.getAndSet(one));
112	>	assertEquals(one,ai.getAndSet(zero));
113	>	assertEquals(zero,ai.getAndSet(m10));
114	>	assertEquals(m10,ai.getAndSet(one));
115	>	}
116	>
117	>	/**
118	>	* a deserialized serialized atomic holds same value
119	>	*/
120	>	public void testSerialization() throws Exception {
121	>	AtomicReference l = new AtomicReference();
122	>
123	>	l.set(one);
124	>	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
125	>	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
126	>	out.writeObject(l);
127	>	out.close();
128	>
129	>	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
130	>	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
131	>	AtomicReference r = (AtomicReference) in.readObject();
132	>	assertEquals(l.get(), r.get());
133	>	}
134	>
135	>	/**
136	>	* toString returns current value.
137	>	*/
138	>	public void testToString() {
139	>	AtomicReference<Integer> ai = new AtomicReference<Integer>(one);
140	>	assertEquals(ai.toString(), one.toString());
141	>	ai.set(two);
142	>	assertEquals(ai.toString(), two.toString());
143		}
144
145		}
75	–

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