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

Comparing jsr166/src/test/tck/AtomicBooleanTest.java (file contents):
Revision 1.4 by dl, Sat Sep 20 18:20:07 2003 UTC vs.
Revision 1.26 by jsr166, Fri Jun 17 01:38:28 2016 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.*;
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	<	junit.textui.TestRunner.run (suite());
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		/**
23	<	*
23	>	* constructor initializes to given value
24		*/
25		public void testConstructor() {
26	<	AtomicBoolean ai = new AtomicBoolean(true);
27	<	assertEquals(true,ai.get());
26	>	assertTrue(new AtomicBoolean(true).get());
27	>	assertFalse(new AtomicBoolean(false).get());
28		}
29
30		/**
31	<	*
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		/**
39	<	*
39	>	* get returns the last value set
40		*/
41		public void testGetSet() {
42		AtomicBoolean ai = new AtomicBoolean(true);
43	<	assertEquals(true,ai.get());
44	<	ai.set(false);
45	<	assertEquals(false,ai.get());
46	<	ai.set(true);
47	<	assertEquals(true,ai.get());
48	<
43	>	assertTrue(ai.get());
44	>	ai.set(false);
45	>	assertFalse(ai.get());
46	>	ai.set(true);
47	>	assertTrue(ai.get());
48	>	}
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.get());
56	>	ai.lazySet(false);
57	>	assertFalse(ai.get());
58	>	ai.lazySet(true);
59	>	assertTrue(ai.get());
60		}
61	+
62		/**
63	<	*
63	>	* compareAndSet succeeds in changing value if equal to expected else fails
64		*/
65		public void testCompareAndSet() {
66		AtomicBoolean ai = new AtomicBoolean(true);
67	<	assertTrue(ai.compareAndSet(true,false));
68	<	assertEquals(false,ai.get());
69	<	assertTrue(ai.compareAndSet(false,false));
70	<	assertEquals(false,ai.get());
71	<	assertFalse(ai.compareAndSet(true,false));
72	<	assertFalse((ai.get()));
73	<	assertTrue(ai.compareAndSet(false,true));
74	<	assertEquals(true,ai.get());
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	<	*
95	>	* repeated weakCompareAndSet succeeds in changing value when equal
96	>	* to expected
97		*/
98		public void testWeakCompareAndSet() {
99		AtomicBoolean ai = new AtomicBoolean(true);
100	<	while(!ai.weakCompareAndSet(true,false));
101	<	assertEquals(false,ai.get());
102	<	while(!ai.weakCompareAndSet(false,false));
103	<	assertEquals(false,ai.get());
104	<	while(!ai.weakCompareAndSet(false,true));
105	<	assertEquals(true,ai.get());
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	<	*
109	>	* getAndSet returns previous value and sets to given value
110		*/
111		public void testGetAndSet() {
112		AtomicBoolean ai = new AtomicBoolean(true);
113	<	assertEquals(true,ai.getAndSet(false));
114	<	assertEquals(false,ai.getAndSet(false));
115	<	assertEquals(false,ai.getAndSet(true));
116	<	assertEquals(true,ai.get());
113	>	assertEquals(true, ai.getAndSet(false));
114	>	assertEquals(false, ai.getAndSet(false));
115	>	assertEquals(false, ai.getAndSet(true));
116	>	assertTrue(ai.get());
117	>	}
118	>
119	>	/**
120	>	* a deserialized serialized atomic holds same value
121	>	*/
122	>	public void testSerialization() throws Exception {
123	>	AtomicBoolean x = new AtomicBoolean();
124	>	AtomicBoolean y = serialClone(x);
125	>	x.set(true);
126	>	AtomicBoolean z = serialClone(x);
127	>	assertTrue(x.get());
128	>	assertFalse(y.get());
129	>	assertTrue(z.get());
130	>	}
131	>
132	>	/**
133	>	* toString returns current value.
134	>	*/
135	>	public void testToString() {
136	>	AtomicBoolean ai = new AtomicBoolean();
137	>	assertEquals(Boolean.toString(false), ai.toString());
138	>	ai.set(true);
139	>	assertEquals(Boolean.toString(true), ai.toString());
140	>	}
141	>
142	>	// jdk9
143	>
144	>	/**
145	>	* getPlain returns the last value set
146	>	*/
147	>	public void testGetPlainSet() {
148	>	AtomicBoolean ai = new AtomicBoolean(true);
149	>	assertEquals(true, ai.getPlain());
150	>	ai.set(false);
151	>	assertEquals(false, ai.getPlain());
152	>	ai.set(true);
153	>	assertEquals(true, ai.getPlain());
154	>	}
155	>
156	>	/**
157	>	* getOpaque returns the last value set
158	>	*/
159	>	public void testGetOpaqueSet() {
160	>	AtomicBoolean ai = new AtomicBoolean(true);
161	>	assertEquals(true, ai.getOpaque());
162	>	ai.set(false);
163	>	assertEquals(false, ai.getOpaque());
164	>	ai.set(true);
165	>	assertEquals(true, ai.getOpaque());
166	>	}
167	>
168	>	/**
169	>	* getAcquire returns the last value set
170	>	*/
171	>	public void testGetAcquireSet() {
172	>	AtomicBoolean ai = new AtomicBoolean(true);
173	>	assertEquals(true, ai.getAcquire());
174	>	ai.set(false);
175	>	assertEquals(false, ai.getAcquire());
176	>	ai.set(true);
177	>	assertEquals(true, ai.getAcquire());
178	>	}
179	>
180	>	/**
181	>	* get returns the last value setPlain
182	>	*/
183	>	public void testGetSetPlain() {
184	>	AtomicBoolean ai = new AtomicBoolean(true);
185	>	assertEquals(true, ai.get());
186	>	ai.setPlain(false);
187	>	assertEquals(false, ai.get());
188	>	ai.setPlain(true);
189	>	assertEquals(true, ai.get());
190	>	}
191	>
192	>	/**
193	>	* get returns the last value setOpaque
194	>	*/
195	>	public void testGetSetOpaque() {
196	>	AtomicBoolean ai = new AtomicBoolean(true);
197	>	assertEquals(true, ai.get());
198	>	ai.setOpaque(false);
199	>	assertEquals(false, ai.get());
200	>	ai.setOpaque(true);
201	>	assertEquals(true, ai.get());
202	>	}
203	>
204	>	/**
205	>	* get returns the last value setRelease
206	>	*/
207	>	public void testGetSetRelease() {
208	>	AtomicBoolean ai = new AtomicBoolean(true);
209	>	assertEquals(true, ai.get());
210	>	ai.setRelease(false);
211	>	assertEquals(false, ai.get());
212	>	ai.setRelease(true);
213	>	assertEquals(true, ai.get());
214	>	}
215	>
216	>	/**
217	>	* compareAndExchange succeeds in changing value if equal to
218	>	* expected else fails
219	>	*/
220	>	public void testCompareAndExchange() {
221	>	AtomicBoolean ai = new AtomicBoolean(true);
222	>	assertEquals(true, ai.compareAndExchange(true, false));
223	>	assertEquals(false, ai.compareAndExchange(false, false));
224	>	assertEquals(false, ai.get());
225	>	assertEquals(false, ai.compareAndExchange(true, true));
226	>	assertEquals(false, ai.get());
227	>	assertEquals(false, ai.compareAndExchange(false, true));
228	>	assertEquals(true, ai.get());
229		}
230
231		/**
232	<	*
233	<	*/
234	<	public void testSerialization() {
235	<	AtomicBoolean l = new AtomicBoolean();
236	<
237	<	try {
238	<	l.set(true);
239	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
240	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
241	<	out.writeObject(l);
242	<	out.close();
243	<
100	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
101	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
102	<	AtomicBoolean r = (AtomicBoolean) in.readObject();
103	<	assertEquals(l.get(), r.get());
104	<	} catch(Exception e){
105	<	e.printStackTrace();
106	<	unexpectedException();
107	<	}
232	>	* compareAndExchangeAcquire succeeds in changing value if equal to
233	>	* expected else fails
234	>	*/
235	>	public void testCompareAndExchangeAcquire() {
236	>	AtomicBoolean ai = new AtomicBoolean(true);
237	>	assertEquals(true, ai.compareAndExchangeAcquire(true, false));
238	>	assertEquals(false, ai.compareAndExchangeAcquire(false, false));
239	>	assertEquals(false, ai.get());
240	>	assertEquals(false, ai.compareAndExchangeAcquire(true, true));
241	>	assertEquals(false, ai.get());
242	>	assertEquals(false, ai.compareAndExchangeAcquire(false, true));
243	>	assertEquals(true, ai.get());
244		}
245
246	+	/**
247	+	* compareAndExchangeRelease succeeds in changing value if equal to
248	+	* expected else fails
249	+	*/
250	+	public void testCompareAndExchangeRelease() {
251	+	AtomicBoolean ai = new AtomicBoolean(true);
252	+	assertEquals(true, ai.compareAndExchangeRelease(true, false));
253	+	assertEquals(false, ai.compareAndExchangeRelease(false, false));
254	+	assertEquals(false, ai.get());
255	+	assertEquals(false, ai.compareAndExchangeRelease(true, true));
256	+	assertEquals(false, ai.get());
257	+	assertEquals(false, ai.compareAndExchangeRelease(false, true));
258	+	assertEquals(true, ai.get());
259	+	}
260	+
261	+	/**
262	+	* repeated weakCompareAndSetVolatile succeeds in changing value when equal
263	+	* to expected
264	+	*/
265	+	public void testWeakCompareAndSetVolatile() {
266	+	AtomicBoolean ai = new AtomicBoolean(true);
267	+	do {} while (!ai.weakCompareAndSetVolatile(true, false));
268	+	do {} while (!ai.weakCompareAndSetVolatile(false, false));
269	+	assertEquals(false, ai.get());
270	+	do {} while (!ai.weakCompareAndSetVolatile(false, true));
271	+	assertEquals(true, ai.get());
272	+	}
273	+
274	+	/**
275	+	* repeated weakCompareAndSetAcquire succeeds in changing value when equal
276	+	* to expected
277	+	*/
278	+	public void testWeakCompareAndSetAcquire() {
279	+	AtomicBoolean ai = new AtomicBoolean(true);
280	+	do {} while (!ai.weakCompareAndSetAcquire(true, false));
281	+	do {} while (!ai.weakCompareAndSetAcquire(false, false));
282	+	assertEquals(false, ai.get());
283	+	do {} while (!ai.weakCompareAndSetAcquire(false, true));
284	+	assertEquals(true, ai.get());
285	+	}
286	+
287	+	/**
288	+	* repeated weakCompareAndSetRelease succeeds in changing value when equal
289	+	* to expected
290	+	*/
291	+	public void testWeakCompareAndSetRelease() {
292	+	AtomicBoolean ai = new AtomicBoolean(true);
293	+	do {} while (!ai.weakCompareAndSetRelease(true, false));
294	+	do {} while (!ai.weakCompareAndSetRelease(false, false));
295	+	assertEquals(false, ai.get());
296	+	do {} while (!ai.weakCompareAndSetRelease(false, true));
297	+	assertEquals(true, ai.get());
298	+	}
299
300		}

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