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

Comparing jsr166/src/test/tck/AtomicBooleanTest.java (file contents):
Revision 1.3 by dl, Sun Sep 14 20:42:40 2003 UTC vs.
Revision 1.15 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.*;
#	Line 17 | Line 18 | public class AtomicBooleanTest extends J
18		return new TestSuite(AtomicBooleanTest.class);
19		}
20
21	<	public void testConstructor(){
21	>	/**
22	>	* constructor initializes to given value
23	>	*/
24	>	public void testConstructor() {
25		AtomicBoolean ai = new AtomicBoolean(true);
26	<	assertEquals(true,ai.get());
26	>	assertEquals(true,ai.get());
27		}
28
29	<	public void testConstructor2(){
29	>	/**
30	>	* default constructed initializes to false
31	>	*/
32	>	public void testConstructor2() {
33		AtomicBoolean ai = new AtomicBoolean();
34	<	assertEquals(false,ai.get());
34	>	assertEquals(false,ai.get());
35		}
36
37	<	public void testGetSet(){
37	>	/**
38	>	* get returns the last value set
39	>	*/
40	>	public void testGetSet() {
41		AtomicBoolean ai = new AtomicBoolean(true);
42	<	assertEquals(true,ai.get());
43	<	ai.set(false);
44	<	assertEquals(false,ai.get());
45	<	ai.set(true);
46	<	assertEquals(true,ai.get());
47	<
42	>	assertEquals(true,ai.get());
43	>	ai.set(false);
44	>	assertEquals(false,ai.get());
45	>	ai.set(true);
46	>	assertEquals(true,ai.get());
47	>
48		}
49	<	public void testCompareAndSet(){
49	>
50	>	/**
51	>	* get returns the last value lazySet in same thread
52	>	*/
53	>	public void testGetLazySet() {
54		AtomicBoolean ai = new AtomicBoolean(true);
55	<	assertTrue(ai.compareAndSet(true,false));
56	<	assertEquals(false,ai.get());
57	<	assertTrue(ai.compareAndSet(false,false));
58	<	assertEquals(false,ai.get());
59	<	assertFalse(ai.compareAndSet(true,false));
60	<	assertFalse((ai.get()));
47	<	assertTrue(ai.compareAndSet(false,true));
48	<	assertEquals(true,ai.get());
55	>	assertEquals(true,ai.get());
56	>	ai.lazySet(false);
57	>	assertEquals(false,ai.get());
58	>	ai.lazySet(true);
59	>	assertEquals(true,ai.get());
60	>
61		}
62
63	<	public void testWeakCompareAndSet(){
63	>	/**
64	>	* compareAndSet succeeds in changing value if equal to expected else fails
65	>	*/
66	>	public void testCompareAndSet() {
67		AtomicBoolean ai = new AtomicBoolean(true);
68	<	while(!ai.weakCompareAndSet(true,false));
54	<	assertEquals(false,ai.get());
55	<	while(!ai.weakCompareAndSet(false,false));
68	>	assertTrue(ai.compareAndSet(true,false));
69		assertEquals(false,ai.get());
70	<	while(!ai.weakCompareAndSet(false,true));
71	<	assertEquals(true,ai.get());
70	>	assertTrue(ai.compareAndSet(false,false));
71	>	assertEquals(false,ai.get());
72	>	assertFalse(ai.compareAndSet(true,false));
73	>	assertFalse((ai.get()));
74	>	assertTrue(ai.compareAndSet(false,true));
75	>	assertEquals(true,ai.get());
76	>	}
77	>
78	>	/**
79	>	* compareAndSet in one thread enables another waiting for value
80	>	* to succeed
81	>	*/
82	>	public void testCompareAndSetInMultipleThreads() throws Exception {
83	>	final AtomicBoolean ai = new AtomicBoolean(true);
84	>	Thread t = new Thread(new CheckedRunnable() {
85	>	public void realRun() {
86	>	while (!ai.compareAndSet(false, true)) Thread.yield();
87	>	}});
88	>
89	>	t.start();
90	>	assertTrue(ai.compareAndSet(true, false));
91	>	t.join(LONG_DELAY_MS);
92	>	assertFalse(t.isAlive());
93	>	}
94	>
95	>	/**
96	>	* repeated weakCompareAndSet succeeds in changing value when equal
97	>	* to expected
98	>	*/
99	>	public void testWeakCompareAndSet() {
100	>	AtomicBoolean ai = new AtomicBoolean(true);
101	>	while (!ai.weakCompareAndSet(true,false));
102	>	assertEquals(false,ai.get());
103	>	while (!ai.weakCompareAndSet(false,false));
104	>	assertEquals(false,ai.get());
105	>	while (!ai.weakCompareAndSet(false,true));
106	>	assertEquals(true,ai.get());
107		}
108
109	<	public void testGetAndSet(){
109	>	/**
110	>	* getAndSet returns previous value and sets to given value
111	>	*/
112	>	public void testGetAndSet() {
113		AtomicBoolean ai = new AtomicBoolean(true);
114	<	assertEquals(true,ai.getAndSet(false));
115	<	assertEquals(false,ai.getAndSet(false));
116	<	assertEquals(false,ai.getAndSet(true));
117	<	assertEquals(true,ai.get());
114	>	assertEquals(true,ai.getAndSet(false));
115	>	assertEquals(false,ai.getAndSet(false));
116	>	assertEquals(false,ai.getAndSet(true));
117	>	assertEquals(true,ai.get());
118		}
119
120	<	public void testSerialization() {
120	>	/**
121	>	* a deserialized serialized atomic holds same value
122	>	*/
123	>	public void testSerialization() throws Exception {
124		AtomicBoolean l = new AtomicBoolean();
125
126	<	try {
127	<	l.set(true);
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	<	AtomicBoolean r = (AtomicBoolean) in.readObject();
136	<	assertEquals(l.get(), r.get());
137	<	} catch(Exception e){
138	<	e.printStackTrace();
139	<	fail("unexpected exception");
140	<	}
126	>	l.set(true);
127	>	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
128	>	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
129	>	out.writeObject(l);
130	>	out.close();
131	>
132	>	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
133	>	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
134	>	AtomicBoolean r = (AtomicBoolean) in.readObject();
135	>	assertEquals(l.get(), r.get());
136	>	}
137	>
138	>	/**
139	>	* toString returns current value.
140	>	*/
141	>	public void testToString() {
142	>	AtomicBoolean ai = new AtomicBoolean();
143	>	assertEquals(ai.toString(), Boolean.toString(false));
144	>	ai.set(true);
145	>	assertEquals(ai.toString(), Boolean.toString(true));
146		}
147
89	–
148		}

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