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

Comparing jsr166/src/test/tck/AtomicBooleanTest.java (file contents):
Revision 1.2 by dl, Sun Sep 7 20:39:11 2003 UTC vs.
Revision 1.29 by jsr166, Fri Aug 4 03:30:21 2017 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 AtomicBooleanTest extends TestCase {
14	<	public static void main (String[] args) {
15	<	junit.textui.TestRunner.run (suite());
9	>	import java.util.concurrent.atomic.AtomicBoolean;
10	>
11	>	import junit.framework.Test;
12	>	import junit.framework.TestSuite;
13	>
14	>	public class AtomicBooleanTest extends JSR166TestCase {
15	>	public static void main(String[] args) {
16	>	main(suite(), args);
17		}
18		public static Test suite() {
19		return new TestSuite(AtomicBooleanTest.class);
20		}
21
22	<	public void testConstructor(){
23	<	AtomicBoolean ai = new AtomicBoolean(true);
24	<	assertEquals(true,ai.get());
22	>	/**
23	>	* constructor initializes to given value
24	>	*/
25	>	public void testConstructor() {
26	>	assertTrue(new AtomicBoolean(true).get());
27	>	assertFalse(new AtomicBoolean(false).get());
28		}
29
30	<	public void testConstructor2(){
30	>	/**
31	>	* default constructed initializes to false
32	>	*/
33	>	public void testConstructor2() {
34		AtomicBoolean ai = new AtomicBoolean();
35	<	assertEquals(false,ai.get());
35	>	assertFalse(ai.get());
36		}
37
38	<	public void testGetSet(){
39	<	AtomicBoolean ai = new AtomicBoolean(true);
40	<	assertEquals(true,ai.get());
41	<	ai.set(false);
34	<	assertEquals(false,ai.get());
35	<	ai.set(true);
36	<	assertEquals(true,ai.get());
37	<
38	<	}
39	<	public void testCompareAndSet(){
38	>	/**
39	>	* get returns the last value set
40	>	*/
41	>	public void testGetSet() {
42		AtomicBoolean ai = new AtomicBoolean(true);
43	<	assertTrue(ai.compareAndSet(true,false));
44	<	assertEquals(false,ai.get());
45	<	assertTrue(ai.compareAndSet(false,false));
46	<	assertEquals(false,ai.get());
47	<	assertFalse(ai.compareAndSet(true,false));
46	<	assertFalse((ai.get()));
47	<	assertTrue(ai.compareAndSet(false,true));
48	<	assertEquals(true,ai.get());
43	>	assertTrue(ai.get());
44	>	ai.set(false);
45	>	assertFalse(ai.get());
46	>	ai.set(true);
47	>	assertTrue(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		AtomicBoolean ai = new AtomicBoolean(true);
55	<	while(!ai.weakCompareAndSet(true,false));
56	<	assertEquals(false,ai.get());
57	<	while(!ai.weakCompareAndSet(false,false));
58	<	assertEquals(false,ai.get());
59	<	while(!ai.weakCompareAndSet(false,true));
58	<	assertEquals(true,ai.get());
55	>	assertTrue(ai.get());
56	>	ai.lazySet(false);
57	>	assertFalse(ai.get());
58	>	ai.lazySet(true);
59	>	assertTrue(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		AtomicBoolean ai = new AtomicBoolean(true);
67	<	assertEquals(true,ai.getAndSet(false));
68	<	assertEquals(false,ai.getAndSet(false));
69	<	assertEquals(false,ai.getAndSet(true));
70	<	assertEquals(true,ai.get());
71	<	}
72	<
73	<	public void testSerialization() {
74	<	AtomicBoolean l = new AtomicBoolean();
75	<
76	<	try {
77	<	l.set(true);
78	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
79	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
80	<	out.writeObject(l);
81	<	out.close();
82	<
83	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
84	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
85	<	AtomicBoolean r = (AtomicBoolean) in.readObject();
86	<	assertEquals(l.get(), r.get());
87	<	} catch(Exception e){
88	<	e.printStackTrace();
89	<	fail("unexpected exception");
90	<	}
67	>	assertTrue(ai.compareAndSet(true, false));
68	>	assertFalse(ai.get());
69	>	assertTrue(ai.compareAndSet(false, false));
70	>	assertFalse(ai.get());
71	>	assertFalse(ai.compareAndSet(true, false));
72	>	assertFalse(ai.get());
73	>	assertTrue(ai.compareAndSet(false, true));
74	>	assertTrue(ai.get());
75	>	}
76	>
77	>	/**
78	>	* compareAndSet in one thread enables another waiting for value
79	>	* to succeed
80	>	*/
81	>	public void testCompareAndSetInMultipleThreads() throws Exception {
82	>	final AtomicBoolean ai = new AtomicBoolean(true);
83	>	Thread t = new Thread(new CheckedRunnable() {
84	>	public void realRun() {
85	>	while (!ai.compareAndSet(false, true)) Thread.yield();
86	>	}});
87	>
88	>	t.start();
89	>	assertTrue(ai.compareAndSet(true, false));
90	>	t.join(LONG_DELAY_MS);
91	>	assertFalse(t.isAlive());
92	>	}
93	>
94	>	/**
95	>	* repeated weakCompareAndSet succeeds in changing value when equal
96	>	* to expected
97	>	*/
98	>	public void testWeakCompareAndSet() {
99	>	AtomicBoolean ai = new AtomicBoolean(true);
100	>	do {} while (!ai.weakCompareAndSet(true, false));
101	>	assertFalse(ai.get());
102	>	do {} while (!ai.weakCompareAndSet(false, false));
103	>	assertFalse(ai.get());
104	>	do {} while (!ai.weakCompareAndSet(false, true));
105	>	assertTrue(ai.get());
106		}
107
108	+	/**
109	+	* getAndSet returns previous value and sets to given value
110	+	*/
111	+	public void testGetAndSet() {
112	+	AtomicBoolean ai = new AtomicBoolean();
113	+	boolean[] booleans = { false, true };
114	+	for (boolean before : booleans)
115	+	for (boolean after : booleans) {
116	+	ai.set(before);
117	+	assertEquals(before, ai.getAndSet(after));
118	+	assertEquals(after, ai.get());
119	+	}
120	+	}
121	+
122	+	/**
123	+	* a deserialized/reserialized atomic holds same value
124	+	*/
125	+	public void testSerialization() throws Exception {
126	+	AtomicBoolean x = new AtomicBoolean();
127	+	AtomicBoolean y = serialClone(x);
128	+	x.set(true);
129	+	AtomicBoolean z = serialClone(x);
130	+	assertTrue(x.get());
131	+	assertFalse(y.get());
132	+	assertTrue(z.get());
133	+	}
134	+
135	+	/**
136	+	* toString returns current value.
137	+	*/
138	+	public void testToString() {
139	+	AtomicBoolean ai = new AtomicBoolean();
140	+	assertEquals(Boolean.toString(false), ai.toString());
141	+	ai.set(true);
142	+	assertEquals(Boolean.toString(true), ai.toString());
143	+	}
144
145		}

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