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

Comparing jsr166/src/test/tck/AtomicReferenceTest.java (file contents):
Revision 1.6 by dl, Sat Dec 27 19:26:43 2003 UTC vs.
Revision 1.12 by jsr166, Tue Nov 17 03:12:51 2009 UTC

#	Line 2 | Line 2
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.
5	>	* Other contributors include Andrew Wright, Jeffrey Hayes,
6	>	* Pat Fisher, Mike Judd.
7		*/
8
9		import junit.framework.*;
#	Line 21 | Line 21 | public class AtomicReferenceTest extends
21		/**
22		* constructor initializes to given value
23		*/
24	<	public void testConstructor(){
24	>	public void testConstructor() {
25		AtomicReference ai = new AtomicReference(one);
26		assertEquals(one,ai.get());
27		}
#	Line 29 | Line 29 | public class AtomicReferenceTest extends
29		/**
30		* default constructed initializes to null
31		*/
32	<	public void testConstructor2(){
32	>	public void testConstructor2() {
33		AtomicReference ai = new AtomicReference();
34		assertNull(ai.get());
35		}
#	Line 37 | Line 37 | public class AtomicReferenceTest extends
37		/**
38		* get returns the last value set
39		*/
40	<	public void testGetSet(){
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());
47	–
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(){
64	>	public void testCompareAndSet() {
65		AtomicReference ai = new AtomicReference(one);
66		assertTrue(ai.compareAndSet(one,two));
67		assertTrue(ai.compareAndSet(two,m4));
#	Line 64 | Line 76 | public class AtomicReferenceTest extends
76		* compareAndSet in one thread enables another waiting for value
77		* to succeed
78		*/
79	<	public void testCompareAndSetInMultipleThreads() {
79	>	public void testCompareAndSetInMultipleThreads() throws Exception {
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();
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);
79	<	}
80	<	catch(Exception e) {
81	<	unexpectedException();
82	<	}
85	>
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
93		/**
94		* repeated weakCompareAndSet succeeds in changing value when equal
95	<	* to expected
95	>	* to expected
96		*/
97	<	public void testWeakCompareAndSet(){
97	>	public void testWeakCompareAndSet() {
98		AtomicReference ai = new AtomicReference(one);
99	<	while(!ai.weakCompareAndSet(one,two));
100	<	while(!ai.weakCompareAndSet(two,m4));
99	>	while (!ai.weakCompareAndSet(one,two));
100	>	while (!ai.weakCompareAndSet(two,m4));
101		assertEquals(m4,ai.get());
102	<	while(!ai.weakCompareAndSet(m4,seven));
102	>	while (!ai.weakCompareAndSet(m4,seven));
103		assertEquals(seven,ai.get());
104		}
105
106		/**
107		* getAndSet returns previous value and sets to given value
108		*/
109	<	public void testGetAndSet(){
109	>	public void testGetAndSet() {
110		AtomicReference ai = new AtomicReference(one);
111		assertEquals(one,ai.getAndSet(zero));
112		assertEquals(zero,ai.getAndSet(m10));
#	Line 108 | Line 116 | public class AtomicReferenceTest extends
116		/**
117		* a deserialized serialized atomic holds same value
118		*/
119	<	public void testSerialization() {
119	>	public void testSerialization() throws Exception {
120		AtomicReference l = new AtomicReference();
121
122	<	try {
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();
124	<	assertEquals(l.get(), r.get());
125	<	} catch(Exception e){
126	<	unexpectedException();
127	<	}
122	>	l.set(one);
123	>	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
124	>	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
125	>	out.writeObject(l);
126	>	out.close();
127	>
128	>	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
129	>	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
130	>	AtomicReference r = (AtomicReference) in.readObject();
131	>	assertEquals(l.get(), r.get());
132		}
133
134	<	}
134	>	/**
135	>	* toString returns current value.
136	>	*/
137	>	public void testToString() {
138	>	AtomicReference<Integer> ai = new AtomicReference<Integer>(one);
139	>	assertEquals(ai.toString(), one.toString());
140	>	ai.set(two);
141	>	assertEquals(ai.toString(), two.toString());
142	>	}
143
144	+	}

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