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

Comparing jsr166/src/test/tck/AtomicIntegerTest.java (file contents):
Revision 1.2 by dl, Sun Sep 7 20:39:11 2003 UTC vs.
Revision 1.18 by jsr166, Sun Nov 22 18:55:56 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 17 | 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());
24	<	}
25	<
26	<	public void testConstructor2(){
21	>	final int[] VALUES = {
22	>	Integer.MIN_VALUE, -1, 0, 1, 42, Integer.MAX_VALUE,
23	>	};
24	>
25	>	/**
26	>	* constructor initializes to given value
27	>	*/
28	>	public void testConstructor() {
29	>	AtomicInteger ai = new AtomicInteger(1);
30	>	assertEquals(1,ai.get());
31	>	}
32	>
33	>	/**
34	>	* default constructed initializes to zero
35	>	*/
36	>	public void testConstructor2() {
37		AtomicInteger ai = new AtomicInteger();
38	<	assertEquals(0,ai.get());
28	<	}
29	<
30	<	public void testGetSet(){
31	<	AtomicInteger ai = new AtomicInteger(1);
32	<	assertEquals(1,ai.get());
33	<	ai.set(2);
34	<	assertEquals(2,ai.get());
35	<	ai.set(-3);
36	<	assertEquals(-3,ai.get());
37	<
38	<	}
39	<	public void testCompareAndSet(){
40	<	AtomicInteger ai = new AtomicInteger(1);
41	<	assertTrue(ai.compareAndSet(1,2));
42	<	assertTrue(ai.compareAndSet(2,-4));
43	<	assertEquals(-4,ai.get());
44	<	assertFalse(ai.compareAndSet(-5,7));
45	<	assertFalse((7 == ai.get()));
46	<	assertTrue(ai.compareAndSet(-4,7));
47	<	assertEquals(7,ai.get());
48	<	}
49	<
50	<	public void testWeakCompareAndSet(){
51	<	AtomicInteger ai = new AtomicInteger(1);
52	<	while(!ai.weakCompareAndSet(1,2));
53	<	while(!ai.weakCompareAndSet(2,-4));
54	<	assertEquals(-4,ai.get());
55	<	while(!ai.weakCompareAndSet(-4,7));
56	<	assertEquals(7,ai.get());
57	<	}
58	<
59	<	public void testGetAndSet(){
60	<	AtomicInteger ai = new AtomicInteger(1);
61	<	assertEquals(1,ai.getAndSet(0));
62	<	assertEquals(0,ai.getAndSet(-10));
63	<	assertEquals(-10,ai.getAndSet(1));
38	>	assertEquals(0,ai.get());
39		}
40
41	<	public void testGetAndAdd(){
42	<	AtomicInteger ai = new AtomicInteger(1);
43	<	assertEquals(1,ai.getAndAdd(2));
44	<	assertEquals(3,ai.get());
45	<	assertEquals(3,ai.getAndAdd(-4));
46	<	assertEquals(-1,ai.get());
47	<	}
48	<
49	<	public void testGetAndDecrement(){
50	<	AtomicInteger ai = new AtomicInteger(1);
51	<	assertEquals(1,ai.getAndDecrement());
52	<	assertEquals(0,ai.getAndDecrement());
53	<	assertEquals(-1,ai.getAndDecrement());
54	<	}
41	>	/**
42	>	* get returns the last value set
43	>	*/
44	>	public void testGetSet() {
45	>	AtomicInteger ai = new AtomicInteger(1);
46	>	assertEquals(1,ai.get());
47	>	ai.set(2);
48	>	assertEquals(2,ai.get());
49	>	ai.set(-3);
50	>	assertEquals(-3,ai.get());
51	>
52	>	}
53	>
54	>	/**
55	>	* get returns the last value lazySet in same thread
56	>	*/
57	>	public void testGetLazySet() {
58	>	AtomicInteger ai = new AtomicInteger(1);
59	>	assertEquals(1,ai.get());
60	>	ai.lazySet(2);
61	>	assertEquals(2,ai.get());
62	>	ai.lazySet(-3);
63	>	assertEquals(-3,ai.get());
64	>
65	>	}
66	>	/**
67	>	* compareAndSet succeeds in changing value if equal to expected else fails
68	>	*/
69	>	public void testCompareAndSet() {
70	>	AtomicInteger ai = new AtomicInteger(1);
71	>	assertTrue(ai.compareAndSet(1,2));
72	>	assertTrue(ai.compareAndSet(2,-4));
73	>	assertEquals(-4,ai.get());
74	>	assertFalse(ai.compareAndSet(-5,7));
75	>	assertFalse((7 == ai.get()));
76	>	assertTrue(ai.compareAndSet(-4,7));
77	>	assertEquals(7,ai.get());
78	>	}
79	>
80	>	/**
81	>	* compareAndSet in one thread enables another waiting for value
82	>	* to succeed
83	>	*/
84	>	public void testCompareAndSetInMultipleThreads() throws Exception {
85	>	final AtomicInteger ai = new AtomicInteger(1);
86	>	Thread t = new Thread(new CheckedRunnable() {
87	>	public void realRun() {
88	>	while (!ai.compareAndSet(2, 3))
89	>	Thread.yield();
90	>	}});
91	>
92	>	t.start();
93	>	assertTrue(ai.compareAndSet(1, 2));
94	>	t.join(LONG_DELAY_MS);
95	>	assertFalse(t.isAlive());
96	>	assertEquals(ai.get(), 3);
97	>	}
98	>
99	>	/**
100	>	* repeated weakCompareAndSet succeeds in changing value when equal
101	>	* to expected
102	>	*/
103	>	public void testWeakCompareAndSet() {
104	>	AtomicInteger ai = new AtomicInteger(1);
105	>	while (!ai.weakCompareAndSet(1,2));
106	>	while (!ai.weakCompareAndSet(2,-4));
107	>	assertEquals(-4,ai.get());
108	>	while (!ai.weakCompareAndSet(-4,7));
109	>	assertEquals(7,ai.get());
110	>	}
111	>
112	>	/**
113	>	* getAndSet returns previous value and sets to given value
114	>	*/
115	>	public void testGetAndSet() {
116	>	AtomicInteger ai = new AtomicInteger(1);
117	>	assertEquals(1,ai.getAndSet(0));
118	>	assertEquals(0,ai.getAndSet(-10));
119	>	assertEquals(-10,ai.getAndSet(1));
120	>	}
121	>
122	>	/**
123	>	* getAndAdd returns previous value and adds given value
124	>	*/
125	>	public void testGetAndAdd() {
126	>	AtomicInteger ai = new AtomicInteger(1);
127	>	assertEquals(1,ai.getAndAdd(2));
128	>	assertEquals(3,ai.get());
129	>	assertEquals(3,ai.getAndAdd(-4));
130	>	assertEquals(-1,ai.get());
131	>	}
132	>
133	>	/**
134	>	* getAndDecrement returns previous value and decrements
135	>	*/
136	>	public void testGetAndDecrement() {
137	>	AtomicInteger ai = new AtomicInteger(1);
138	>	assertEquals(1,ai.getAndDecrement());
139	>	assertEquals(0,ai.getAndDecrement());
140	>	assertEquals(-1,ai.getAndDecrement());
141	>	}
142	>
143	>	/**
144	>	* getAndIncrement returns previous value and increments
145	>	*/
146	>	public void testGetAndIncrement() {
147	>	AtomicInteger ai = new AtomicInteger(1);
148	>	assertEquals(1,ai.getAndIncrement());
149	>	assertEquals(2,ai.get());
150	>	ai.set(-2);
151	>	assertEquals(-2,ai.getAndIncrement());
152	>	assertEquals(-1,ai.getAndIncrement());
153	>	assertEquals(0,ai.getAndIncrement());
154	>	assertEquals(1,ai.get());
155	>	}
156	>
157	>	/**
158	>	* addAndGet adds given value to current, and returns current value
159	>	*/
160	>	public void testAddAndGet() {
161	>	AtomicInteger ai = new AtomicInteger(1);
162	>	assertEquals(3,ai.addAndGet(2));
163	>	assertEquals(3,ai.get());
164	>	assertEquals(-1,ai.addAndGet(-4));
165	>	assertEquals(-1,ai.get());
166	>	}
167	>
168	>	/**
169	>	* decrementAndGet decrements and returns current value
170	>	*/
171	>	public void testDecrementAndGet() {
172	>	AtomicInteger ai = new AtomicInteger(1);
173	>	assertEquals(0,ai.decrementAndGet());
174	>	assertEquals(-1,ai.decrementAndGet());
175	>	assertEquals(-2,ai.decrementAndGet());
176	>	assertEquals(-2,ai.get());
177	>	}
178	>
179	>	/**
180	>	* incrementAndGet increments and returns current value
181	>	*/
182	>	public void testIncrementAndGet() {
183	>	AtomicInteger ai = new AtomicInteger(1);
184	>	assertEquals(2,ai.incrementAndGet());
185	>	assertEquals(2,ai.get());
186	>	ai.set(-2);
187	>	assertEquals(-1,ai.incrementAndGet());
188	>	assertEquals(0,ai.incrementAndGet());
189	>	assertEquals(1,ai.incrementAndGet());
190	>	assertEquals(1,ai.get());
191	>	}
192	>
193	>	/**
194	>	* a deserialized serialized atomic holds same value
195	>	*/
196	>	public void testSerialization() throws Exception {
197	>	AtomicInteger l = new AtomicInteger();
198
199	<	public void testGetAndIncrement(){
200	<	AtomicInteger ai = new AtomicInteger(1);
201	<	assertEquals(1,ai.getAndIncrement());
202	<	assertEquals(2,ai.get());
203	<	ai.set(-2);
204	<	assertEquals(-2,ai.getAndIncrement());
205	<	assertEquals(-1,ai.getAndIncrement());
206	<	assertEquals(0,ai.getAndIncrement());
207	<	assertEquals(1,ai.get());
199	>	l.set(22);
200	>	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
201	>	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
202	>	out.writeObject(l);
203	>	out.close();
204	>
205	>	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
206	>	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
207	>	AtomicInteger r = (AtomicInteger) in.readObject();
208	>	assertEquals(l.get(), r.get());
209	>	}
210	>
211	>	/**
212	>	* toString returns current value.
213	>	*/
214	>	public void testToString() {
215	>	AtomicInteger ai = new AtomicInteger();
216	>	assertEquals("0", ai.toString());
217	>	for (int x : VALUES) {
218	>	ai.set(x);
219	>	assertEquals(ai.toString(), Integer.toString(x));
220	>	}
221		}
222
223	<	public void testAddAndGet(){
224	<	AtomicInteger ai = new AtomicInteger(1);
225	<	assertEquals(3,ai.addAndGet(2));
226	<	assertEquals(3,ai.get());
227	<	assertEquals(-1,ai.addAndGet(-4));
228	<	assertEquals(-1,ai.get());
223	>	/**
224	>	* intValue returns current value.
225	>	*/
226	>	public void testIntValue() {
227	>	AtomicInteger ai = new AtomicInteger();
228	>	assertEquals(0, ai.intValue());
229	>	for (int x : VALUES) {
230	>	ai.set(x);
231	>	assertEquals(x, ai.intValue());
232	>	}
233		}
234
235	<	public void testDecrementAndGet(){
236	<	AtomicInteger ai = new AtomicInteger(1);
237	<	assertEquals(0,ai.decrementAndGet());
238	<	assertEquals(-1,ai.decrementAndGet());
239	<	assertEquals(-2,ai.decrementAndGet());
240	<	assertEquals(-2,ai.get());
235	>	/**
236	>	* longValue returns current value.
237	>	*/
238	>	public void testLongValue() {
239	>	AtomicInteger ai = new AtomicInteger();
240	>	assertEquals(0L, ai.longValue());
241	>	for (int x : VALUES) {
242	>	ai.set(x);
243	>	assertEquals((long)x, ai.longValue());
244	>	}
245		}
246
247	<	public void testIncrementAndGet(){
248	<	AtomicInteger ai = new AtomicInteger(1);
249	<	assertEquals(2,ai.incrementAndGet());
250	<	assertEquals(2,ai.get());
251	<	ai.set(-2);
252	<	assertEquals(-1,ai.incrementAndGet());
253	<	assertEquals(0,ai.incrementAndGet());
254	<	assertEquals(1,ai.incrementAndGet());
255	<	assertEquals(1,ai.get());
247	>	/**
248	>	* floatValue returns current value.
249	>	*/
250	>	public void testFloatValue() {
251	>	AtomicInteger ai = new AtomicInteger();
252	>	assertEquals(0.0f, ai.floatValue());
253	>	for (int x : VALUES) {
254	>	ai.set(x);
255	>	assertEquals((float)x, ai.floatValue());
256	>	}
257		}
258
259	<	public void testSerialization() {
260	<	AtomicInteger l = new AtomicInteger();
261	<
262	<	try {
263	<	l.set(22);
264	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
265	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
266	<	out.writeObject(l);
267	<	out.close();
128	<
129	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
130	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
131	<	AtomicInteger r = (AtomicInteger) in.readObject();
132	<	assertEquals(l.get(), r.get());
133	<	} catch(Exception e){
134	<	e.printStackTrace();
135	<	fail("unexpected exception");
259	>	/**
260	>	* doubleValue returns current value.
261	>	*/
262	>	public void testDoubleValue() {
263	>	AtomicInteger ai = new AtomicInteger();
264	>	assertEquals(0.0d, ai.doubleValue());
265	>	for (int x : VALUES) {
266	>	ai.set(x);
267	>	assertEquals((double)x, ai.doubleValue());
268		}
269		}
270
139	–
271		}

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