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

Comparing jsr166/src/test/tck/AtomicIntegerTest.java (file contents):
Revision 1.1 by dl, Sun Aug 31 19:24:53 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.*;
10		import java.util.concurrent.atomic.*;
11	+	import java.io.*;
12
13	<	public class AtomicIntegerTest extends TestCase {
13	>	public class AtomicIntegerTest extends JSR166TestCase {
14		public static void main (String[] args) {
15		junit.textui.TestRunner.run (suite());
16		}
#	Line 16 | Line 18 | public class AtomicIntegerTest extends T
18		return new TestSuite(AtomicIntegerTest.class);
19		}
20
21	<	public void testConstructor(){
22	<	AtomicInteger ai = new AtomicInteger(1);
23	<	assertEquals(1,ai.get());
21	>	/**
22	>	* constructor initializes to given value
23	>	*/
24	>	public void testConstructor() {
25	>	AtomicInteger ai = new AtomicInteger(1);
26	>	assertEquals(1,ai.get());
27		}
28
29	<	public void testConstructor2(){
29	>	/**
30	>	* default constructed initializes to zero
31	>	*/
32	>	public void testConstructor2() {
33		AtomicInteger ai = new AtomicInteger();
34	<	assertEquals(0,ai.get());
27	<	}
28	<
29	<	public void testGetSet(){
30	<	AtomicInteger ai = new AtomicInteger(1);
31	<	assertEquals(1,ai.get());
32	<	ai.set(2);
33	<	assertEquals(2,ai.get());
34	<	ai.set(-3);
35	<	assertEquals(-3,ai.get());
36	<
37	<	}
38	<	public void testCompareAndSet(){
39	<	AtomicInteger ai = new AtomicInteger(1);
40	<	assertTrue(ai.compareAndSet(1,2));
41	<	assertTrue(ai.compareAndSet(2,-4));
42	<	assertEquals(-4,ai.get());
43	<	assertFalse(ai.compareAndSet(-5,7));
44	<	assertFalse((7 == ai.get()));
45	<	assertTrue(ai.compareAndSet(-4,7));
46	<	assertEquals(7,ai.get());
34	>	assertEquals(0,ai.get());
35		}
36
37	<	public void testWeakCompareAndSet(){
38	<	AtomicInteger ai = new AtomicInteger(1);
39	<	while(!ai.weakCompareAndSet(1,2));
40	<	while(!ai.weakCompareAndSet(2,-4));
41	<	assertEquals(-4,ai.get());
42	<	while(!ai.weakCompareAndSet(-4,7));
43	<	assertEquals(7,ai.get());
44	<	}
45	<
46	<	public void testGetAndSet(){
47	<	AtomicInteger ai = new AtomicInteger(1);
48	<	assertEquals(1,ai.getAndSet(0));
49	<	assertEquals(0,ai.getAndSet(-10));
50	<	assertEquals(-10,ai.getAndSet(1));
37	>	/**
38	>	* get returns the last value set
39	>	*/
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	>
48	>	}
49	>
50	>	/**
51	>	* get returns the last value lazySet in same thread
52	>	*/
53	>	public void testGetLazySet() {
54	>	AtomicInteger ai = new AtomicInteger(1);
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	>	* repeated weakCompareAndSet succeeds in changing value when equal
97	>	* to expected
98	>	*/
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());
106	>	}
107	>
108	>	/**
109	>	* getAndSet returns previous value and sets to given value
110	>	*/
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));
116	>	}
117	>
118	>	/**
119	>	* getAndAdd returns previous value and adds given value
120	>	*/
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());
127	>	}
128	>
129	>	/**
130	>	* getAndDecrement returns previous value and decrements
131	>	*/
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());
137	>	}
138	>
139	>	/**
140	>	* getAndIncrement returns previous value and increments
141	>	*/
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());
151	>	}
152	>
153	>	/**
154	>	* addAndGet adds given value to current, and returns current value
155	>	*/
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());
162	>	}
163	>
164	>	/**
165	>	* decrementAndGet decrements and returns current value
166	>	*/
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());
173	>	}
174	>
175	>	/**
176	>	* incrementAndGet increments and returns current value
177	>	*/
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());
187	>	}
188	>
189	>	/**
190	>	* a deserialized serialized atomic holds same value
191	>	*/
192	>	public void testSerialization() throws Exception {
193	>	AtomicInteger l = new AtomicInteger();
194	>
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	<	public void testGetAndAdd(){
219	<	AtomicInteger ai = new AtomicInteger(1);
220	<	assertEquals(1,ai.getAndAdd(2));
221	<	assertEquals(3,ai.get());
222	<	assertEquals(3,ai.getAndAdd(-4));
223	<	assertEquals(-1,ai.get());
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
73	–	public void testGetAndDecrement(){
74	–	AtomicInteger ai = new AtomicInteger(1);
75	–	assertEquals(1,ai.getAndDecrement());
76	–	assertEquals(0,ai.getAndDecrement());
77	–	assertEquals(-1,ai.getAndDecrement());
78	–	}
229
230	<	public void testGetAndIncrement(){
231	<	AtomicInteger ai = new AtomicInteger(1);
232	<	assertEquals(1,ai.getAndIncrement());
233	<	assertEquals(2,ai.get());
234	<	ai.set(-2);
235	<	assertEquals(-2,ai.getAndIncrement());
236	<	assertEquals(-1,ai.getAndIncrement());
237	<	assertEquals(0,ai.getAndIncrement());
238	<	assertEquals(1,ai.get());
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	<	public void testAddAndGet(){
242	<	AtomicInteger ai = new AtomicInteger(1);
243	<	assertEquals(3,ai.addAndGet(2));
244	<	assertEquals(3,ai.get());
245	<	assertEquals(-1,ai.addAndGet(-4));
246	<	assertEquals(-1,ai.get());
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	<	public void testDecrementAndGet(){
253	<	AtomicInteger ai = new AtomicInteger(1);
254	<	assertEquals(0,ai.decrementAndGet());
255	<	assertEquals(-1,ai.decrementAndGet());
256	<	assertEquals(-2,ai.decrementAndGet());
257	<	assertEquals(-2,ai.get());
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
107	–	public void testIncrementAndGet(){
108	–	AtomicInteger ai = new AtomicInteger(1);
109	–	assertEquals(2,ai.incrementAndGet());
110	–	assertEquals(2,ai.get());
111	–	ai.set(-2);
112	–	assertEquals(-1,ai.incrementAndGet());
113	–	assertEquals(0,ai.incrementAndGet());
114	–	assertEquals(1,ai.incrementAndGet());
115	–	assertEquals(1,ai.get());
116	–	}
263
264
265		}

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