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

Comparing jsr166/src/test/tck/AtomicIntegerTest.java (file contents):
Revision 1.4 by dl, Sat Sep 20 18:20:07 2003 UTC vs.
Revision 1.17 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 18 | Line 19 | public class AtomicIntegerTest extends J
19		}
20
21		/**
22	<	*
22	>	* constructor initializes to given value
23		*/
24	<	public void testConstructor(){
24	>	public void testConstructor() {
25		AtomicInteger ai = new AtomicInteger(1);
26	<	assertEquals(1,ai.get());
26	>	assertEquals(1,ai.get());
27		}
28
29		/**
30	<	*
30	>	* default constructed initializes to zero
31		*/
32	<	public void testConstructor2(){
32	>	public void testConstructor2() {
33		AtomicInteger ai = new AtomicInteger();
34	<	assertEquals(0,ai.get());
34	>	assertEquals(0,ai.get());
35		}
36
37		/**
38	<	*
38	>	* get returns the last value set
39		*/
40	<	public void testGetSet(){
40	>	public void testGetSet() {
41		AtomicInteger ai = new AtomicInteger(1);
42	<	assertEquals(1,ai.get());
43	<	ai.set(2);
44	<	assertEquals(2,ai.get());
45	<	ai.set(-3);
46	<	assertEquals(-3,ai.get());
47	<
42	>	assertEquals(1,ai.get());
43	>	ai.set(2);
44	>	assertEquals(2,ai.get());
45	>	ai.set(-3);
46	>	assertEquals(-3,ai.get());
47	>
48		}
49	+
50		/**
51	<	*
51	>	* get returns the last value lazySet in same thread
52		*/
53	<	public void testCompareAndSet(){
53	>	public void testGetLazySet() {
54		AtomicInteger ai = new AtomicInteger(1);
55	<	assertTrue(ai.compareAndSet(1,2));
56	<	assertTrue(ai.compareAndSet(2,-4));
57	<	assertEquals(-4,ai.get());
58	<	assertFalse(ai.compareAndSet(-5,7));
59	<	assertFalse((7 == ai.get()));
60	<	assertTrue(ai.compareAndSet(-4,7));
61	<	assertEquals(7,ai.get());
55	>	assertEquals(1,ai.get());
56	>	ai.lazySet(2);
57	>	assertEquals(2,ai.get());
58	>	ai.lazySet(-3);
59	>	assertEquals(-3,ai.get());
60	>
61	>	}
62	>	/**
63	>	* compareAndSet succeeds in changing value if equal to expected else fails
64	>	*/
65	>	public void testCompareAndSet() {
66	>	AtomicInteger ai = new AtomicInteger(1);
67	>	assertTrue(ai.compareAndSet(1,2));
68	>	assertTrue(ai.compareAndSet(2,-4));
69	>	assertEquals(-4,ai.get());
70	>	assertFalse(ai.compareAndSet(-5,7));
71	>	assertFalse((7 == ai.get()));
72	>	assertTrue(ai.compareAndSet(-4,7));
73	>	assertEquals(7,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 AtomicInteger ai = new AtomicInteger(1);
82	>	Thread t = new Thread(new CheckedRunnable() {
83	>	public void realRun() {
84	>	while (!ai.compareAndSet(2, 3))
85	>	Thread.yield();
86	>	}});
87	>
88	>	t.start();
89	>	assertTrue(ai.compareAndSet(1, 2));
90	>	t.join(LONG_DELAY_MS);
91	>	assertFalse(t.isAlive());
92	>	assertEquals(ai.get(), 3);
93		}
94
95		/**
96	<	*
96	>	* repeated weakCompareAndSet succeeds in changing value when equal
97	>	* to expected
98		*/
99	<	public void testWeakCompareAndSet(){
99	>	public void testWeakCompareAndSet() {
100		AtomicInteger ai = new AtomicInteger(1);
101	<	while(!ai.weakCompareAndSet(1,2));
102	<	while(!ai.weakCompareAndSet(2,-4));
103	<	assertEquals(-4,ai.get());
104	<	while(!ai.weakCompareAndSet(-4,7));
105	<	assertEquals(7,ai.get());
101	>	while (!ai.weakCompareAndSet(1,2));
102	>	while (!ai.weakCompareAndSet(2,-4));
103	>	assertEquals(-4,ai.get());
104	>	while (!ai.weakCompareAndSet(-4,7));
105	>	assertEquals(7,ai.get());
106		}
107
108		/**
109	<	*
109	>	* getAndSet returns previous value and sets to given value
110		*/
111	<	public void testGetAndSet(){
111	>	public void testGetAndSet() {
112		AtomicInteger ai = new AtomicInteger(1);
113	<	assertEquals(1,ai.getAndSet(0));
114	<	assertEquals(0,ai.getAndSet(-10));
115	<	assertEquals(-10,ai.getAndSet(1));
113	>	assertEquals(1,ai.getAndSet(0));
114	>	assertEquals(0,ai.getAndSet(-10));
115	>	assertEquals(-10,ai.getAndSet(1));
116		}
117
118		/**
119	<	*
119	>	* getAndAdd returns previous value and adds given value
120		*/
121	<	public void testGetAndAdd(){
121	>	public void testGetAndAdd() {
122		AtomicInteger ai = new AtomicInteger(1);
123	<	assertEquals(1,ai.getAndAdd(2));
124	<	assertEquals(3,ai.get());
125	<	assertEquals(3,ai.getAndAdd(-4));
126	<	assertEquals(-1,ai.get());
123	>	assertEquals(1,ai.getAndAdd(2));
124	>	assertEquals(3,ai.get());
125	>	assertEquals(3,ai.getAndAdd(-4));
126	>	assertEquals(-1,ai.get());
127		}
128
129		/**
130	<	*
130	>	* getAndDecrement returns previous value and decrements
131		*/
132	<	public void testGetAndDecrement(){
132	>	public void testGetAndDecrement() {
133		AtomicInteger ai = new AtomicInteger(1);
134	<	assertEquals(1,ai.getAndDecrement());
135	<	assertEquals(0,ai.getAndDecrement());
136	<	assertEquals(-1,ai.getAndDecrement());
134	>	assertEquals(1,ai.getAndDecrement());
135	>	assertEquals(0,ai.getAndDecrement());
136	>	assertEquals(-1,ai.getAndDecrement());
137		}
138
139		/**
140	<	*
140	>	* getAndIncrement returns previous value and increments
141		*/
142	<	public void testGetAndIncrement(){
142	>	public void testGetAndIncrement() {
143		AtomicInteger ai = new AtomicInteger(1);
144	<	assertEquals(1,ai.getAndIncrement());
145	<	assertEquals(2,ai.get());
146	<	ai.set(-2);
147	<	assertEquals(-2,ai.getAndIncrement());
148	<	assertEquals(-1,ai.getAndIncrement());
149	<	assertEquals(0,ai.getAndIncrement());
150	<	assertEquals(1,ai.get());
144	>	assertEquals(1,ai.getAndIncrement());
145	>	assertEquals(2,ai.get());
146	>	ai.set(-2);
147	>	assertEquals(-2,ai.getAndIncrement());
148	>	assertEquals(-1,ai.getAndIncrement());
149	>	assertEquals(0,ai.getAndIncrement());
150	>	assertEquals(1,ai.get());
151		}
152
153		/**
154	<	*
154	>	* addAndGet adds given value to current, and returns current value
155		*/
156	<	public void testAddAndGet(){
156	>	public void testAddAndGet() {
157		AtomicInteger ai = new AtomicInteger(1);
158	<	assertEquals(3,ai.addAndGet(2));
159	<	assertEquals(3,ai.get());
160	<	assertEquals(-1,ai.addAndGet(-4));
161	<	assertEquals(-1,ai.get());
158	>	assertEquals(3,ai.addAndGet(2));
159	>	assertEquals(3,ai.get());
160	>	assertEquals(-1,ai.addAndGet(-4));
161	>	assertEquals(-1,ai.get());
162		}
163
164		/**
165	<	*
165	>	* decrementAndGet decrements and returns current value
166		*/
167	<	public void testDecrementAndGet(){
167	>	public void testDecrementAndGet() {
168		AtomicInteger ai = new AtomicInteger(1);
169	<	assertEquals(0,ai.decrementAndGet());
170	<	assertEquals(-1,ai.decrementAndGet());
171	<	assertEquals(-2,ai.decrementAndGet());
172	<	assertEquals(-2,ai.get());
169	>	assertEquals(0,ai.decrementAndGet());
170	>	assertEquals(-1,ai.decrementAndGet());
171	>	assertEquals(-2,ai.decrementAndGet());
172	>	assertEquals(-2,ai.get());
173		}
174
175		/**
176	<	*
176	>	* incrementAndGet increments and returns current value
177		*/
178	<	public void testIncrementAndGet(){
178	>	public void testIncrementAndGet() {
179		AtomicInteger ai = new AtomicInteger(1);
180	<	assertEquals(2,ai.incrementAndGet());
181	<	assertEquals(2,ai.get());
182	<	ai.set(-2);
183	<	assertEquals(-1,ai.incrementAndGet());
184	<	assertEquals(0,ai.incrementAndGet());
185	<	assertEquals(1,ai.incrementAndGet());
186	<	assertEquals(1,ai.get());
180	>	assertEquals(2,ai.incrementAndGet());
181	>	assertEquals(2,ai.get());
182	>	ai.set(-2);
183	>	assertEquals(-1,ai.incrementAndGet());
184	>	assertEquals(0,ai.incrementAndGet());
185	>	assertEquals(1,ai.incrementAndGet());
186	>	assertEquals(1,ai.get());
187		}
188
189		/**
190	<	*
190	>	* a deserialized serialized atomic holds same value
191		*/
192	<	public void testSerialization() {
192	>	public void testSerialization() throws Exception {
193		AtomicInteger l = new AtomicInteger();
194
195	<	try {
196	<	l.set(22);
197	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
198	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
199	<	out.writeObject(l);
200	<	out.close();
201	<
202	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
203	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
204	<	AtomicInteger r = (AtomicInteger) in.readObject();
205	<	assertEquals(l.get(), r.get());
206	<	} catch(Exception e){
207	<	unexpectedException();
195	>	l.set(22);
196	>	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
197	>	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
198	>	out.writeObject(l);
199	>	out.close();
200	>
201	>	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
202	>	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
203	>	AtomicInteger r = (AtomicInteger) in.readObject();
204	>	assertEquals(l.get(), r.get());
205	>	}
206	>
207	>	/**
208	>	* toString returns current value.
209	>	*/
210	>	public void testToString() {
211	>	AtomicInteger ai = new AtomicInteger();
212	>	for (int i = -12; i < 6; ++i) {
213	>	ai.set(i);
214	>	assertEquals(ai.toString(), Integer.toString(i));
215	>	}
216	>	}
217	>
218	>	/**
219	>	* intValue returns current value.
220	>	*/
221	>	public void testIntValue() {
222	>	AtomicInteger ai = new AtomicInteger();
223	>	for (int i = -12; i < 6; ++i) {
224	>	ai.set(i);
225	>	assertEquals(i, ai.intValue());
226	>	}
227	>	}
228	>
229	>
230	>	/**
231	>	* longValue returns current value.
232	>	*/
233	>	public void testLongValue() {
234	>	AtomicInteger ai = new AtomicInteger();
235	>	for (int i = -12; i < 6; ++i) {
236	>	ai.set(i);
237	>	assertEquals((long)i, ai.longValue());
238	>	}
239	>	}
240	>
241	>	/**
242	>	* floatValue returns current value.
243	>	*/
244	>	public void testFloatValue() {
245	>	AtomicInteger ai = new AtomicInteger();
246	>	for (int i = -12; i < 6; ++i) {
247	>	ai.set(i);
248	>	assertEquals((float)i, ai.floatValue());
249		}
250		}
251
252	+	/**
253	+	* doubleValue returns current value.
254	+	*/
255	+	public void testDoubleValue() {
256	+	AtomicInteger ai = new AtomicInteger();
257	+	for (int i = -12; i < 6; ++i) {
258	+	ai.set(i);
259	+	assertEquals((double)i, ai.doubleValue());
260	+	}
261	+	}
262	+
263	+
264
265		}

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