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

Comparing jsr166/src/test/tck/AtomicReferenceTest.java (file contents):
Revision 1.2 by dl, Sun Sep 7 20:39:11 2003 UTC vs.
Revision 1.23 by jsr166, Wed Dec 31 19:21:20 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 junit.framework.*;
10	<	import java.util.concurrent.atomic.*;
11	<	import java.io.*;
12	<
13	<	public class AtomicReferenceTest extends TestCase {
14	<	public static void main (String[] args) {
15	<	junit.textui.TestRunner.run (suite());
9	>	import java.util.concurrent.atomic.AtomicReference;
10	>
11	>	import junit.framework.Test;
12	>	import junit.framework.TestSuite;
13	>
14	>	public class AtomicReferenceTest extends JSR166TestCase {
15	>	public static void main(String[] args) {
16	>	junit.textui.TestRunner.run(suite());
17		}
18		public static Test suite() {
19		return new TestSuite(AtomicReferenceTest.class);
20		}
21
22	<	static final Integer zero = new Integer(0);
23	<	static final Integer one = new Integer(1);
24	<	static final Integer two = new Integer(2);
25	<	static final Integer m3  = new Integer(-3);
24	<	static final Integer m4 = new Integer(-4);
25	<	static final Integer m5 = new Integer(-5);
26	<	static final Integer seven = new Integer(7);
27	<	static final Integer m10 = new Integer(-10);
28	<
29	<	public void testConstructor(){
22	>	/**
23	>	* constructor initializes to given value
24	>	*/
25	>	public void testConstructor() {
26		AtomicReference ai = new AtomicReference(one);
27	<	assertEquals(one,ai.get());
27	>	assertSame(one, ai.get());
28		}
29
30	<	public void testConstructor2(){
30	>	/**
31	>	* default constructed initializes to null
32	>	*/
33	>	public void testConstructor2() {
34		AtomicReference ai = new AtomicReference();
35	<	assertNull(ai.get());
35	>	assertNull(ai.get());
36		}
37
38	<	public void testGetSet(){
39	<	AtomicReference ai = new AtomicReference(one);
40	<	assertEquals(one,ai.get());
41	<	ai.set(two);
43	<	assertEquals(two,ai.get());
44	<	ai.set(m3);
45	<	assertEquals(m3,ai.get());
46	<
47	<	}
48	<	public void testCompareAndSet(){
38	>	/**
39	>	* get returns the last value set
40	>	*/
41	>	public void testGetSet() {
42		AtomicReference ai = new AtomicReference(one);
43	<	assertTrue(ai.compareAndSet(one,two));
44	<	assertTrue(ai.compareAndSet(two,m4));
45	<	assertEquals(m4,ai.get());
46	<	assertFalse(ai.compareAndSet(m5,seven));
47	<	assertFalse((seven.equals(ai.get())));
55	<	assertTrue(ai.compareAndSet(m4,seven));
56	<	assertEquals(seven,ai.get());
43	>	assertSame(one, ai.get());
44	>	ai.set(two);
45	>	assertSame(two, ai.get());
46	>	ai.set(m3);
47	>	assertSame(m3, ai.get());
48		}
49
50	<	public void testWeakCompareAndSet(){
50	>	/**
51	>	* get returns the last value lazySet in same thread
52	>	*/
53	>	public void testGetLazySet() {
54		AtomicReference ai = new AtomicReference(one);
55	<	while(!ai.weakCompareAndSet(one,two));
56	<	while(!ai.weakCompareAndSet(two,m4));
57	<	assertEquals(m4,ai.get());
58	<	while(!ai.weakCompareAndSet(m4,seven));
59	<	assertEquals(seven,ai.get());
55	>	assertSame(one, ai.get());
56	>	ai.lazySet(two);
57	>	assertSame(two, ai.get());
58	>	ai.lazySet(m3);
59	>	assertSame(m3, ai.get());
60		}
61
62	<	public void testGetAndSet(){
62	>	/**
63	>	* compareAndSet succeeds in changing value if equal to expected else fails
64	>	*/
65	>	public void testCompareAndSet() {
66		AtomicReference ai = new AtomicReference(one);
67	<	assertEquals(one,ai.getAndSet(zero));
68	<	assertEquals(zero,ai.getAndSet(m10));
69	<	assertEquals(m10,ai.getAndSet(one));
67	>	assertTrue(ai.compareAndSet(one, two));
68	>	assertTrue(ai.compareAndSet(two, m4));
69	>	assertSame(m4, ai.get());
70	>	assertFalse(ai.compareAndSet(m5, seven));
71	>	assertSame(m4, ai.get());
72	>	assertTrue(ai.compareAndSet(m4, seven));
73	>	assertSame(seven, ai.get());
74	>	}
75	>
76	>	/**
77	>	* compareAndSet in one thread enables another waiting for value
78	>	* to succeed
79	>	*/
80	>	public void testCompareAndSetInMultipleThreads() throws Exception {
81	>	final AtomicReference ai = new AtomicReference(one);
82	>	Thread t = new Thread(new CheckedRunnable() {
83	>	public void realRun() {
84	>	while (!ai.compareAndSet(two, three))
85	>	Thread.yield();
86	>	}});
87	>
88	>	t.start();
89	>	assertTrue(ai.compareAndSet(one, two));
90	>	t.join(LONG_DELAY_MS);
91	>	assertFalse(t.isAlive());
92	>	assertSame(three, ai.get());
93	>	}
94	>
95	>	/**
96	>	* repeated weakCompareAndSet succeeds in changing value when equal
97	>	* to expected
98	>	*/
99	>	public void testWeakCompareAndSet() {
100	>	AtomicReference ai = new AtomicReference(one);
101	>	do {} while (!ai.weakCompareAndSet(one, two));
102	>	do {} while (!ai.weakCompareAndSet(two, m4));
103	>	assertSame(m4, ai.get());
104	>	do {} while (!ai.weakCompareAndSet(m4, seven));
105	>	assertSame(seven, ai.get());
106		}
107
108	<	public void testSerialization() {
109	<	AtomicReference l = new AtomicReference();
110	<
111	<	try {
112	<	l.set(one);
113	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
114	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
115	<	out.writeObject(l);
116	<	out.close();
117	<
118	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
119	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
120	<	AtomicReference r = (AtomicReference) in.readObject();
121	<	assertEquals(l.get(), r.get());
122	<	} catch(Exception e){
123	<	e.printStackTrace();
124	<	fail("unexpected exception");
125	<	}
108	>	/**
109	>	* getAndSet returns previous value and sets to given value
110	>	*/
111	>	public void testGetAndSet() {
112	>	AtomicReference ai = new AtomicReference(one);
113	>	assertSame(one, ai.getAndSet(zero));
114	>	assertSame(zero, ai.getAndSet(m10));
115	>	assertSame(m10, ai.getAndSet(one));
116	>	}
117	>
118	>	/**
119	>	* a deserialized serialized atomic holds same value
120	>	*/
121	>	public void testSerialization() throws Exception {
122	>	AtomicReference x = new AtomicReference();
123	>	AtomicReference y = serialClone(x);
124	>	assertNotSame(x, y);
125	>	x.set(one);
126	>	AtomicReference z = serialClone(x);
127	>	assertNotSame(y, z);
128	>	assertEquals(one, x.get());
129	>	assertEquals(null, y.get());
130	>	assertEquals(one, z.get());
131	>	}
132	>
133	>	/**
134	>	* toString returns current value.
135	>	*/
136	>	public void testToString() {
137	>	AtomicReference<Integer> ai = new AtomicReference<Integer>(one);
138	>	assertEquals(one.toString(), ai.toString());
139	>	ai.set(two);
140	>	assertEquals(two.toString(), ai.toString());
141		}
142
143		}
96	–

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