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

Comparing jsr166/src/test/tck/AtomicReferenceTest.java (file contents):
Revision 1.3 by dl, Sun Sep 14 20:42:40 2003 UTC vs.
Revision 1.25 by dl, Thu Jun 16 23:35:25 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.AtomicReference;
10	>
11	>	import junit.framework.Test;
12	>	import junit.framework.TestSuite;
13
14		public class AtomicReferenceTest 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(AtomicReferenceTest.class);
20		}
21
22	<	public void testConstructor(){
22	>	/**
23	>	* constructor initializes to given value
24	>	*/
25	>	public void testConstructor() {
26		AtomicReference ai = new AtomicReference(one);
27	<	assertEquals(one,ai.get());
27	>	assertSame(one, ai.get());
28		}
29
30	<	public void testConstructor2(){
30	>	/**
31	>	* default constructed initializes to null
32	>	*/
33	>	public void testConstructor2() {
34		AtomicReference ai = new AtomicReference();
35	<	assertNull(ai.get());
35	>	assertNull(ai.get());
36		}
37
38	<	public void testGetSet(){
38	>	/**
39	>	* get returns the last value set
40	>	*/
41	>	public void testGetSet() {
42		AtomicReference ai = new AtomicReference(one);
43	<	assertEquals(one,ai.get());
44	<	ai.set(two);
45	<	assertEquals(two,ai.get());
46	<	ai.set(m3);
47	<	assertEquals(m3,ai.get());
37	<
43	>	assertSame(one, ai.get());
44	>	ai.set(two);
45	>	assertSame(two, ai.get());
46	>	ai.set(m3);
47	>	assertSame(m3, ai.get());
48		}
49	<	public void testCompareAndSet(){
49	>
50	>	/**
51	>	* get returns the last value lazySet in same thread
52	>	*/
53	>	public void testGetLazySet() {
54		AtomicReference ai = new AtomicReference(one);
55	<	assertTrue(ai.compareAndSet(one,two));
56	<	assertTrue(ai.compareAndSet(two,m4));
57	<	assertEquals(m4,ai.get());
58	<	assertFalse(ai.compareAndSet(m5,seven));
59	<	assertFalse((seven.equals(ai.get())));
46	<	assertTrue(ai.compareAndSet(m4,seven));
47	<	assertEquals(seven,ai.get());
55	>	assertSame(one, ai.get());
56	>	ai.lazySet(two);
57	>	assertSame(two, ai.get());
58	>	ai.lazySet(m3);
59	>	assertSame(m3, ai.get());
60		}
61
62	<	public void testWeakCompareAndSet(){
62	>	/**
63	>	* compareAndSet succeeds in changing value if equal to expected else fails
64	>	*/
65	>	public void testCompareAndSet() {
66		AtomicReference ai = new AtomicReference(one);
67	<	while(!ai.weakCompareAndSet(one,two));
68	<	while(!ai.weakCompareAndSet(two,m4));
69	<	assertEquals(m4,ai.get());
70	<	while(!ai.weakCompareAndSet(m4,seven));
71	<	assertEquals(seven,ai.get());
67	>	assertTrue(ai.compareAndSet(one, two));
68	>	assertTrue(ai.compareAndSet(two, m4));
69	>	assertSame(m4, ai.get());
70	>	assertFalse(ai.compareAndSet(m5, seven));
71	>	assertSame(m4, ai.get());
72	>	assertTrue(ai.compareAndSet(m4, seven));
73	>	assertSame(seven, ai.get());
74	>	}
75	>
76	>	/**
77	>	* compareAndSet in one thread enables another waiting for value
78	>	* to succeed
79	>	*/
80	>	public void testCompareAndSetInMultipleThreads() throws Exception {
81	>	final AtomicReference ai = new AtomicReference(one);
82	>	Thread t = new Thread(new CheckedRunnable() {
83	>	public void realRun() {
84	>	while (!ai.compareAndSet(two, three))
85	>	Thread.yield();
86	>	}});
87	>
88	>	t.start();
89	>	assertTrue(ai.compareAndSet(one, two));
90	>	t.join(LONG_DELAY_MS);
91	>	assertFalse(t.isAlive());
92	>	assertSame(three, ai.get());
93		}
94
95	<	public void testGetAndSet(){
95	>	/**
96	>	* repeated weakCompareAndSet succeeds in changing value when equal
97	>	* to expected
98	>	*/
99	>	public void testWeakCompareAndSet() {
100		AtomicReference ai = new AtomicReference(one);
101	<	assertEquals(one,ai.getAndSet(zero));
102	<	assertEquals(zero,ai.getAndSet(m10));
103	<	assertEquals(m10,ai.getAndSet(one));
101	>	do {} while (!ai.weakCompareAndSet(one, two));
102	>	do {} while (!ai.weakCompareAndSet(two, m4));
103	>	assertSame(m4, ai.get());
104	>	do {} while (!ai.weakCompareAndSet(m4, seven));
105	>	assertSame(seven, ai.get());
106		}
107
108	<	public void testSerialization() {
109	<	AtomicReference l = new AtomicReference();
108	>	/**
109	>	* getAndSet returns previous value and sets to given value
110	>	*/
111	>	public void testGetAndSet() {
112	>	AtomicReference ai = new AtomicReference(one);
113	>	assertSame(one, ai.getAndSet(zero));
114	>	assertSame(zero, ai.getAndSet(m10));
115	>	assertSame(m10, ai.getAndSet(one));
116	>	}
117
118	<	try {
119	<	l.set(one);
120	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
121	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
122	<	out.writeObject(l);
123	<	out.close();
118	>	/**
119	>	* a deserialized serialized atomic holds same value
120	>	*/
121	>	public void testSerialization() throws Exception {
122	>	AtomicReference x = new AtomicReference();
123	>	AtomicReference y = serialClone(x);
124	>	assertNotSame(x, y);
125	>	x.set(one);
126	>	AtomicReference z = serialClone(x);
127	>	assertNotSame(y, z);
128	>	assertEquals(one, x.get());
129	>	assertEquals(null, y.get());
130	>	assertEquals(one, z.get());
131	>	}
132
133	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
134	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
135	<	AtomicReference r = (AtomicReference) in.readObject();
136	<	assertEquals(l.get(), r.get());
137	<	} catch(Exception e){
138	<	e.printStackTrace();
139	<	fail("unexpected exception");
140	<	}
133	>	/**
134	>	* toString returns current value.
135	>	*/
136	>	public void testToString() {
137	>	AtomicReference<Integer> ai = new AtomicReference<Integer>(one);
138	>	assertEquals(one.toString(), ai.toString());
139	>	ai.set(two);
140	>	assertEquals(two.toString(), ai.toString());
141		}
142
143	<	}
143	>	// jdk9
144	>
145	>	/**
146	>	* getPlain returns the last value set
147	>	*/
148	>	public void testGetPlainSet() {
149	>	AtomicReference<Integer> ai = new AtomicReference<Integer>(one);
150	>	assertEquals(one, ai.getPlain());
151	>	ai.set(two);
152	>	assertEquals(two, ai.getPlain());
153	>	ai.set(m3);
154	>	assertEquals(m3, ai.getPlain());
155	>	}
156	>
157	>	/**
158	>	* getOpaque returns the last value set
159	>	*/
160	>	public void testGetOpaqueSet() {
161	>	AtomicReference<Integer> ai = new AtomicReference<Integer>(one);
162	>	assertEquals(one, ai.getOpaque());
163	>	ai.set(two);
164	>	assertEquals(two, ai.getOpaque());
165	>	ai.set(m3);
166	>	assertEquals(m3, ai.getOpaque());
167	>	}
168
169	+	/**
170	+	* getAcquire returns the last value set
171	+	*/
172	+	public void testGetAcquireSet() {
173	+	AtomicReference<Integer> ai = new AtomicReference<Integer>(one);
174	+	assertEquals(one, ai.getAcquire());
175	+	ai.set(two);
176	+	assertEquals(two, ai.getAcquire());
177	+	ai.set(m3);
178	+	assertEquals(m3, ai.getAcquire());
179	+	}
180	+
181	+	/**
182	+	* get returns the last value setPlain
183	+	*/
184	+	public void testGetSetPlain() {
185	+	AtomicReference<Integer> ai = new AtomicReference<Integer>(one);
186	+	assertEquals(one, ai.get());
187	+	ai.setPlain(two);
188	+	assertEquals(two, ai.get());
189	+	ai.setPlain(m3);
190	+	assertEquals(m3, ai.get());
191	+	}
192	+
193	+	/**
194	+	* get returns the last value setOpaque
195	+	*/
196	+	public void testGetSetOpaque() {
197	+	AtomicReference<Integer> ai = new AtomicReference<Integer>(one);
198	+	assertEquals(one, ai.get());
199	+	ai.setOpaque(two);
200	+	assertEquals(two, ai.get());
201	+	ai.setOpaque(m3);
202	+	assertEquals(m3, ai.get());
203	+	}
204	+
205	+	/**
206	+	* get returns the last value setRelease
207	+	*/
208	+	public void testGetSetRelease() {
209	+	AtomicReference<Integer> ai = new AtomicReference<Integer>(one);
210	+	assertEquals(one, ai.get());
211	+	ai.setRelease(two);
212	+	assertEquals(two, ai.get());
213	+	ai.setRelease(m3);
214	+	assertEquals(m3, ai.get());
215	+	}
216	+
217	+	/**
218	+	* compareAndExchange succeeds in changing value if equal to
219	+	* expected else fails
220	+	*/
221	+	public void testCompareAndExchange() {
222	+	AtomicReference<Integer> ai = new AtomicReference<Integer>(one);
223	+	assertEquals(one, ai.compareAndExchange(one, two));
224	+	assertEquals(two, ai.compareAndExchange(two, m4));
225	+	assertEquals(m4, ai.get());
226	+	assertEquals(m4, ai.compareAndExchange(m5, seven));
227	+	assertEquals(m4, ai.get());
228	+	assertEquals(m4, ai.compareAndExchange(m4, seven));
229	+	assertEquals(seven, ai.get());
230	+	}
231	+
232	+	/**
233	+	* compareAndExchangeAcquire succeeds in changing value if equal to
234	+	* expected else fails
235	+	*/
236	+	public void testCompareAndExchangeAcquire() {
237	+	AtomicReference<Integer> ai = new AtomicReference<Integer>(one);
238	+	assertEquals(one, ai.compareAndExchangeAcquire(one, two));
239	+	assertEquals(two, ai.compareAndExchangeAcquire(two, m4));
240	+	assertEquals(m4, ai.get());
241	+	assertEquals(m4, ai.compareAndExchangeAcquire(m5, seven));
242	+	assertEquals(m4, ai.get());
243	+	assertEquals(m4, ai.compareAndExchangeAcquire(m4, seven));
244	+	assertEquals(seven, ai.get());
245	+	}
246	+
247	+	/**
248	+	* compareAndExchangeRelease succeeds in changing value if equal to
249	+	* expected else fails
250	+	*/
251	+	public void testCompareAndExchangeRelease() {
252	+	AtomicReference<Integer> ai = new AtomicReference<Integer>(one);
253	+	assertEquals(one, ai.compareAndExchangeRelease(one, two));
254	+	assertEquals(two, ai.compareAndExchangeRelease(two, m4));
255	+	assertEquals(m4, ai.get());
256	+	assertEquals(m4, ai.compareAndExchangeRelease(m5, seven));
257	+	assertEquals(m4, ai.get());
258	+	assertEquals(m4, ai.compareAndExchangeRelease(m4, seven));
259	+	assertEquals(seven, ai.get());
260	+	}
261	+
262	+	/**
263	+	* repeated weakCompareAndSetVolatile succeeds in changing value when equal
264	+	* to expected
265	+	*/
266	+	public void testWeakCompareAndSetVolatile() {
267	+	AtomicReference<Integer> ai = new AtomicReference<Integer>(one);
268	+	do {} while (!ai.weakCompareAndSetVolatile(one, two));
269	+	do {} while (!ai.weakCompareAndSetVolatile(two, m4));
270	+	assertEquals(m4, ai.get());
271	+	do {} while (!ai.weakCompareAndSetVolatile(m4, seven));
272	+	assertEquals(seven, ai.get());
273	+	}
274	+
275	+	/**
276	+	* repeated weakCompareAndSetAcquire succeeds in changing value when equal
277	+	* to expected
278	+	*/
279	+	public void testWeakCompareAndSetAcquire() {
280	+	AtomicReference<Integer> ai = new AtomicReference<Integer>(one);
281	+	do {} while (!ai.weakCompareAndSetAcquire(one, two));
282	+	do {} while (!ai.weakCompareAndSetAcquire(two, m4));
283	+	assertEquals(m4, ai.get());
284	+	do {} while (!ai.weakCompareAndSetAcquire(m4, seven));
285	+	assertEquals(seven, ai.get());
286	+	}
287	+
288	+	/**
289	+	* repeated weakCompareAndSetRelease succeeds in changing value when equal
290	+	* to expected
291	+	*/
292	+	public void testWeakCompareAndSetRelease() {
293	+	AtomicReference<Integer> ai = new AtomicReference<Integer>(one);
294	+	do {} while (!ai.weakCompareAndSetRelease(one, two));
295	+	do {} while (!ai.weakCompareAndSetRelease(two, m4));
296	+	assertEquals(m4, ai.get());
297	+	do {} while (!ai.weakCompareAndSetRelease(m4, seven));
298	+	assertEquals(seven, ai.get());
299	+	}
300	+
301	+
302	+
303	+	}

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