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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 1.9 by jsr166, Mon Nov 2 20:28:31 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);
22	<	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	<
21	>	/**
22	>	* constructor initializes to given value
23	>	*/
24		public void testConstructor(){
25		AtomicReference ai = new AtomicReference(one);
26		assertEquals(one,ai.get());
27		}
28
29	+	/**
30	+	* default constructed initializes to null
31	+	*/
32		public void testConstructor2(){
33		AtomicReference ai = new AtomicReference();
34		assertNull(ai.get());
35		}
36
37	+	/**
38	+	* get returns the last value set
39	+	*/
40		public void testGetSet(){
41		AtomicReference ai = new AtomicReference(one);
42		assertEquals(one,ai.get());
#	Line 42 | Line 44 | public class AtomicReferenceTest extends
44		assertEquals(two,ai.get());
45		ai.set(m3);
46		assertEquals(m3,ai.get());
45	–
47		}
48	+
49	+	/**
50	+	* get returns the last value lazySet in same thread
51	+	*/
52	+	public void testGetLazySet(){
53	+	AtomicReference ai = new AtomicReference(one);
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	+	/**
62	+	* compareAndSet succeeds in changing value if equal to expected else fails
63	+	*/
64		public void testCompareAndSet(){
65		AtomicReference ai = new AtomicReference(one);
66		assertTrue(ai.compareAndSet(one,two));
#	Line 55 | Line 72 | public class AtomicReferenceTest extends
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() {
80	+	final AtomicReference ai = new AtomicReference(one);
81	+	Thread t = new Thread(new Runnable() {
82	+	public void run() {
83	+	while(!ai.compareAndSet(two, three)) Thread.yield();
84	+	}});
85	+	try {
86	+	t.start();
87	+	assertTrue(ai.compareAndSet(one, two));
88	+	t.join(LONG_DELAY_MS);
89	+	assertFalse(t.isAlive());
90	+	assertEquals(ai.get(), three);
91	+	}
92	+	catch(Exception e) {
93	+	unexpectedException();
94	+	}
95	+	}
96	+
97	+	/**
98	+	* repeated weakCompareAndSet succeeds in changing value when equal
99	+	* to expected
100	+	*/
101		public void testWeakCompareAndSet(){
102		AtomicReference ai = new AtomicReference(one);
103		while(!ai.weakCompareAndSet(one,two));
#	Line 64 | Line 107 | public class AtomicReferenceTest extends
107		assertEquals(seven,ai.get());
108		}
109
110	+	/**
111	+	* getAndSet returns previous value and sets to given value
112	+	*/
113		public void testGetAndSet(){
114		AtomicReference ai = new AtomicReference(one);
115		assertEquals(one,ai.getAndSet(zero));
#	Line 71 | Line 117 | public class AtomicReferenceTest extends
117		assertEquals(m10,ai.getAndSet(one));
118		}
119
120	<	}
120	>	/**
121	>	* a deserialized serialized atomic holds same value
122	>	*/
123	>	public void testSerialization() {
124	>	AtomicReference l = new AtomicReference();
125	>
126	>	try {
127	>	l.set(one);
128	>	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
129	>	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
130	>	out.writeObject(l);
131	>	out.close();
132	>
133	>	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
134	>	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
135	>	AtomicReference r = (AtomicReference) in.readObject();
136	>	assertEquals(l.get(), r.get());
137	>	} catch(Exception e){
138	>	unexpectedException();
139	>	}
140	>	}
141	>
142	>	/**
143	>	* toString returns current value.
144	>	*/
145	>	public void testToString() {
146	>	AtomicReference<Integer> ai = new AtomicReference<Integer>(one);
147	>	assertEquals(ai.toString(), one.toString());
148	>	ai.set(two);
149	>	assertEquals(ai.toString(), two.toString());
150	>	}
151
152	+	}

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