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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 1.19 by jsr166, Tue May 31 16:16:23 2011 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.*;
10	<	import java.io.*;
10	>	import java.util.concurrent.atomic.AtomicBoolean;
11
12		public class AtomicBooleanTest extends JSR166TestCase {
13	<	public static void main (String[] args) {
14	<	junit.textui.TestRunner.run (suite());
13	>	public static void main(String[] args) {
14	>	junit.textui.TestRunner.run(suite());
15		}
16		public static Test suite() {
17		return new TestSuite(AtomicBooleanTest.class);
18		}
19
20	<	public void testConstructor(){
21	<	AtomicBoolean ai = new AtomicBoolean(true);
22	<	assertEquals(true,ai.get());
20	>	/**
21	>	* constructor initializes to given value
22	>	*/
23	>	public void testConstructor() {
24	>	assertTrue(new AtomicBoolean(true).get());
25	>	assertFalse(new AtomicBoolean(false).get());
26		}
27
28	<	public void testConstructor2(){
28	>	/**
29	>	* default constructed initializes to false
30	>	*/
31	>	public void testConstructor2() {
32		AtomicBoolean ai = new AtomicBoolean();
33	<	assertEquals(false,ai.get());
33	>	assertFalse(ai.get());
34		}
35
36	<	public void testGetSet(){
36	>	/**
37	>	* get returns the last value set
38	>	*/
39	>	public void testGetSet() {
40		AtomicBoolean ai = new AtomicBoolean(true);
41	<	assertEquals(true,ai.get());
42	<	ai.set(false);
43	<	assertEquals(false,ai.get());
44	<	ai.set(true);
45	<	assertEquals(true,ai.get());
37	<
41	>	assertTrue(ai.get());
42	>	ai.set(false);
43	>	assertFalse(ai.get());
44	>	ai.set(true);
45	>	assertTrue(ai.get());
46		}
47	<	public void testCompareAndSet(){
47	>
48	>	/**
49	>	* get returns the last value lazySet in same thread
50	>	*/
51	>	public void testGetLazySet() {
52		AtomicBoolean ai = new AtomicBoolean(true);
53	<	assertTrue(ai.compareAndSet(true,false));
54	<	assertEquals(false,ai.get());
55	<	assertTrue(ai.compareAndSet(false,false));
56	<	assertEquals(false,ai.get());
57	<	assertFalse(ai.compareAndSet(true,false));
46	<	assertFalse((ai.get()));
47	<	assertTrue(ai.compareAndSet(false,true));
48	<	assertEquals(true,ai.get());
53	>	assertTrue(ai.get());
54	>	ai.lazySet(false);
55	>	assertFalse(ai.get());
56	>	ai.lazySet(true);
57	>	assertTrue(ai.get());
58		}
59
60	<	public void testWeakCompareAndSet(){
60	>	/**
61	>	* compareAndSet succeeds in changing value if equal to expected else fails
62	>	*/
63	>	public void testCompareAndSet() {
64	>	AtomicBoolean ai = new AtomicBoolean(true);
65	>	assertTrue(ai.compareAndSet(true,false));
66	>	assertFalse(ai.get());
67	>	assertTrue(ai.compareAndSet(false,false));
68	>	assertFalse(ai.get());
69	>	assertFalse(ai.compareAndSet(true,false));
70	>	assertFalse(ai.get());
71	>	assertTrue(ai.compareAndSet(false,true));
72	>	assertTrue(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 AtomicBoolean ai = new AtomicBoolean(true);
81	>	Thread t = new Thread(new CheckedRunnable() {
82	>	public void realRun() {
83	>	while (!ai.compareAndSet(false, true)) Thread.yield();
84	>	}});
85	>
86	>	t.start();
87	>	assertTrue(ai.compareAndSet(true, false));
88	>	t.join(LONG_DELAY_MS);
89	>	assertFalse(t.isAlive());
90	>	}
91	>
92	>	/**
93	>	* repeated weakCompareAndSet succeeds in changing value when equal
94	>	* to expected
95	>	*/
96	>	public void testWeakCompareAndSet() {
97		AtomicBoolean ai = new AtomicBoolean(true);
98	<	while(!ai.weakCompareAndSet(true,false));
99	<	assertEquals(false,ai.get());
100	<	while(!ai.weakCompareAndSet(false,false));
101	<	assertEquals(false,ai.get());
102	<	while(!ai.weakCompareAndSet(false,true));
103	<	assertEquals(true,ai.get());
98	>	while (!ai.weakCompareAndSet(true,false));
99	>	assertFalse(ai.get());
100	>	while (!ai.weakCompareAndSet(false,false));
101	>	assertFalse(ai.get());
102	>	while (!ai.weakCompareAndSet(false,true));
103	>	assertTrue(ai.get());
104		}
105
106	<	public void testGetAndSet(){
106	>	/**
107	>	* getAndSet returns previous value and sets to given value
108	>	*/
109	>	public void testGetAndSet() {
110		AtomicBoolean ai = new AtomicBoolean(true);
111	<	assertEquals(true,ai.getAndSet(false));
112	<	assertEquals(false,ai.getAndSet(false));
113	<	assertEquals(false,ai.getAndSet(true));
114	<	assertEquals(true,ai.get());
115	<	}
116	<
117	<	public void testSerialization() {
118	<	AtomicBoolean l = new AtomicBoolean();
119	<
120	<	try {
121	<	l.set(true);
122	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
123	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
124	<	out.writeObject(l);
125	<	out.close();
126	<
127	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
128	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
129	<	AtomicBoolean r = (AtomicBoolean) in.readObject();
130	<	assertEquals(l.get(), r.get());
131	<	} catch(Exception e){
132	<	e.printStackTrace();
133	<	fail("unexpected exception");
134	<	}
111	>	assertEquals(true,ai.getAndSet(false));
112	>	assertEquals(false,ai.getAndSet(false));
113	>	assertEquals(false,ai.getAndSet(true));
114	>	assertTrue(ai.get());
115	>	}
116	>
117	>	/**
118	>	* a deserialized serialized atomic holds same value
119	>	*/
120	>	public void testSerialization() throws Exception {
121	>	AtomicBoolean x = new AtomicBoolean();
122	>	AtomicBoolean y = serialClone(x);
123	>	x.set(true);
124	>	AtomicBoolean z = serialClone(x);
125	>	assertTrue(x.get());
126	>	assertFalse(y.get());
127	>	assertTrue(z.get());
128	>	}
129	>
130	>	/**
131	>	* toString returns current value.
132	>	*/
133	>	public void testToString() {
134	>	AtomicBoolean ai = new AtomicBoolean();
135	>	assertEquals(ai.toString(), Boolean.toString(false));
136	>	ai.set(true);
137	>	assertEquals(ai.toString(), Boolean.toString(true));
138		}
139
89	–
140		}

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