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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 1.22 by jsr166, Tue May 31 16:16:23 2011 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.*;
10	<	import java.io.*;
10	>	import java.util.concurrent.atomic.AtomicInteger;
11
12	<	public class AtomicIntegerTest extends TestCase {
13	<	public static void main (String[] args) {
14	<	junit.textui.TestRunner.run (suite());
12	>	public class AtomicIntegerTest extends JSR166TestCase {
13	>	public static void main(String[] args) {
14	>	junit.textui.TestRunner.run(suite());
15		}
16		public static Test suite() {
17		return new TestSuite(AtomicIntegerTest.class);
18		}
19
20	<	public void testConstructor(){
21	<	AtomicInteger ai = new AtomicInteger(1);
22	<	assertEquals(1,ai.get());
23	<	}
24	<
25	<	public void testConstructor2(){
20	>	final int[] VALUES = {
21	>	Integer.MIN_VALUE, -1, 0, 1, 42, Integer.MAX_VALUE,
22	>	};
23	>
24	>	/**
25	>	* constructor initializes to given value
26	>	*/
27	>	public void testConstructor() {
28	>	AtomicInteger ai = new AtomicInteger(1);
29	>	assertEquals(1,ai.get());
30	>	}
31	>
32	>	/**
33	>	* default constructed initializes to zero
34	>	*/
35	>	public void testConstructor2() {
36		AtomicInteger ai = new AtomicInteger();
37	<	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));
64	<	}
65	<
66	<	public void testGetAndAdd(){
67	<	AtomicInteger ai = new AtomicInteger(1);
68	<	assertEquals(1,ai.getAndAdd(2));
69	<	assertEquals(3,ai.get());
70	<	assertEquals(3,ai.getAndAdd(-4));
71	<	assertEquals(-1,ai.get());
72	<	}
73	<
74	<	public void testGetAndDecrement(){
75	<	AtomicInteger ai = new AtomicInteger(1);
76	<	assertEquals(1,ai.getAndDecrement());
77	<	assertEquals(0,ai.getAndDecrement());
78	<	assertEquals(-1,ai.getAndDecrement());
37	>	assertEquals(0,ai.get());
38		}
39
40	<	public void testGetAndIncrement(){
41	<	AtomicInteger ai = new AtomicInteger(1);
42	<	assertEquals(1,ai.getAndIncrement());
43	<	assertEquals(2,ai.get());
44	<	ai.set(-2);
45	<	assertEquals(-2,ai.getAndIncrement());
46	<	assertEquals(-1,ai.getAndIncrement());
47	<	assertEquals(0,ai.getAndIncrement());
48	<	assertEquals(1,ai.get());
40	>	/**
41	>	* get returns the last value set
42	>	*/
43	>	public void testGetSet() {
44	>	AtomicInteger ai = new AtomicInteger(1);
45	>	assertEquals(1,ai.get());
46	>	ai.set(2);
47	>	assertEquals(2,ai.get());
48	>	ai.set(-3);
49	>	assertEquals(-3,ai.get());
50	>	}
51	>
52	>	/**
53	>	* get returns the last value lazySet in same thread
54	>	*/
55	>	public void testGetLazySet() {
56	>	AtomicInteger ai = new AtomicInteger(1);
57	>	assertEquals(1,ai.get());
58	>	ai.lazySet(2);
59	>	assertEquals(2,ai.get());
60	>	ai.lazySet(-3);
61	>	assertEquals(-3,ai.get());
62	>	}
63	>
64	>	/**
65	>	* compareAndSet succeeds in changing value if equal to expected else fails
66	>	*/
67	>	public void testCompareAndSet() {
68	>	AtomicInteger ai = new AtomicInteger(1);
69	>	assertTrue(ai.compareAndSet(1,2));
70	>	assertTrue(ai.compareAndSet(2,-4));
71	>	assertEquals(-4,ai.get());
72	>	assertFalse(ai.compareAndSet(-5,7));
73	>	assertEquals(-4,ai.get());
74	>	assertTrue(ai.compareAndSet(-4,7));
75	>	assertEquals(7,ai.get());
76	>	}
77	>
78	>	/**
79	>	* compareAndSet in one thread enables another waiting for value
80	>	* to succeed
81	>	*/
82	>	public void testCompareAndSetInMultipleThreads() throws Exception {
83	>	final AtomicInteger ai = new AtomicInteger(1);
84	>	Thread t = new Thread(new CheckedRunnable() {
85	>	public void realRun() {
86	>	while (!ai.compareAndSet(2, 3))
87	>	Thread.yield();
88	>	}});
89	>
90	>	t.start();
91	>	assertTrue(ai.compareAndSet(1, 2));
92	>	t.join(LONG_DELAY_MS);
93	>	assertFalse(t.isAlive());
94	>	assertEquals(ai.get(), 3);
95	>	}
96	>
97	>	/**
98	>	* repeated weakCompareAndSet succeeds in changing value when equal
99	>	* to expected
100	>	*/
101	>	public void testWeakCompareAndSet() {
102	>	AtomicInteger ai = new AtomicInteger(1);
103	>	while (!ai.weakCompareAndSet(1,2));
104	>	while (!ai.weakCompareAndSet(2,-4));
105	>	assertEquals(-4,ai.get());
106	>	while (!ai.weakCompareAndSet(-4,7));
107	>	assertEquals(7,ai.get());
108	>	}
109	>
110	>	/**
111	>	* getAndSet returns previous value and sets to given value
112	>	*/
113	>	public void testGetAndSet() {
114	>	AtomicInteger ai = new AtomicInteger(1);
115	>	assertEquals(1,ai.getAndSet(0));
116	>	assertEquals(0,ai.getAndSet(-10));
117	>	assertEquals(-10,ai.getAndSet(1));
118	>	}
119	>
120	>	/**
121	>	* getAndAdd returns previous value and adds given value
122	>	*/
123	>	public void testGetAndAdd() {
124	>	AtomicInteger ai = new AtomicInteger(1);
125	>	assertEquals(1,ai.getAndAdd(2));
126	>	assertEquals(3,ai.get());
127	>	assertEquals(3,ai.getAndAdd(-4));
128	>	assertEquals(-1,ai.get());
129	>	}
130	>
131	>	/**
132	>	* getAndDecrement returns previous value and decrements
133	>	*/
134	>	public void testGetAndDecrement() {
135	>	AtomicInteger ai = new AtomicInteger(1);
136	>	assertEquals(1,ai.getAndDecrement());
137	>	assertEquals(0,ai.getAndDecrement());
138	>	assertEquals(-1,ai.getAndDecrement());
139	>	}
140	>
141	>	/**
142	>	* getAndIncrement returns previous value and increments
143	>	*/
144	>	public void testGetAndIncrement() {
145	>	AtomicInteger ai = new AtomicInteger(1);
146	>	assertEquals(1,ai.getAndIncrement());
147	>	assertEquals(2,ai.get());
148	>	ai.set(-2);
149	>	assertEquals(-2,ai.getAndIncrement());
150	>	assertEquals(-1,ai.getAndIncrement());
151	>	assertEquals(0,ai.getAndIncrement());
152	>	assertEquals(1,ai.get());
153	>	}
154	>
155	>	/**
156	>	* addAndGet adds given value to current, and returns current value
157	>	*/
158	>	public void testAddAndGet() {
159	>	AtomicInteger ai = new AtomicInteger(1);
160	>	assertEquals(3,ai.addAndGet(2));
161	>	assertEquals(3,ai.get());
162	>	assertEquals(-1,ai.addAndGet(-4));
163	>	assertEquals(-1,ai.get());
164	>	}
165	>
166	>	/**
167	>	* decrementAndGet decrements and returns current value
168	>	*/
169	>	public void testDecrementAndGet() {
170	>	AtomicInteger ai = new AtomicInteger(1);
171	>	assertEquals(0,ai.decrementAndGet());
172	>	assertEquals(-1,ai.decrementAndGet());
173	>	assertEquals(-2,ai.decrementAndGet());
174	>	assertEquals(-2,ai.get());
175	>	}
176	>
177	>	/**
178	>	* incrementAndGet increments and returns current value
179	>	*/
180	>	public void testIncrementAndGet() {
181	>	AtomicInteger ai = new AtomicInteger(1);
182	>	assertEquals(2,ai.incrementAndGet());
183	>	assertEquals(2,ai.get());
184	>	ai.set(-2);
185	>	assertEquals(-1,ai.incrementAndGet());
186	>	assertEquals(0,ai.incrementAndGet());
187	>	assertEquals(1,ai.incrementAndGet());
188	>	assertEquals(1,ai.get());
189	>	}
190	>
191	>	/**
192	>	* a deserialized serialized atomic holds same value
193	>	*/
194	>	public void testSerialization() throws Exception {
195	>	AtomicInteger x = new AtomicInteger();
196	>	AtomicInteger y = serialClone(x);
197	>	assertTrue(x != y);
198	>	x.set(22);
199	>	AtomicInteger z = serialClone(x);
200	>	assertEquals(22, x.get());
201	>	assertEquals(0, y.get());
202	>	assertEquals(22, z.get());
203	>	}
204	>
205	>	/**
206	>	* toString returns current value.
207	>	*/
208	>	public void testToString() {
209	>	AtomicInteger ai = new AtomicInteger();
210	>	assertEquals("0", ai.toString());
211	>	for (int x : VALUES) {
212	>	ai.set(x);
213	>	assertEquals(ai.toString(), Integer.toString(x));
214	>	}
215		}
216
217	<	public void testAddAndGet(){
218	<	AtomicInteger ai = new AtomicInteger(1);
219	<	assertEquals(3,ai.addAndGet(2));
220	<	assertEquals(3,ai.get());
221	<	assertEquals(-1,ai.addAndGet(-4));
222	<	assertEquals(-1,ai.get());
217	>	/**
218	>	* intValue returns current value.
219	>	*/
220	>	public void testIntValue() {
221	>	AtomicInteger ai = new AtomicInteger();
222	>	assertEquals(0, ai.intValue());
223	>	for (int x : VALUES) {
224	>	ai.set(x);
225	>	assertEquals(x, ai.intValue());
226	>	}
227		}
228
229	<	public void testDecrementAndGet(){
230	<	AtomicInteger ai = new AtomicInteger(1);
231	<	assertEquals(0,ai.decrementAndGet());
232	<	assertEquals(-1,ai.decrementAndGet());
233	<	assertEquals(-2,ai.decrementAndGet());
234	<	assertEquals(-2,ai.get());
229	>	/**
230	>	* longValue returns current value.
231	>	*/
232	>	public void testLongValue() {
233	>	AtomicInteger ai = new AtomicInteger();
234	>	assertEquals(0L, ai.longValue());
235	>	for (int x : VALUES) {
236	>	ai.set(x);
237	>	assertEquals((long)x, ai.longValue());
238	>	}
239		}
240
241	<	public void testIncrementAndGet(){
242	<	AtomicInteger ai = new AtomicInteger(1);
243	<	assertEquals(2,ai.incrementAndGet());
244	<	assertEquals(2,ai.get());
245	<	ai.set(-2);
246	<	assertEquals(-1,ai.incrementAndGet());
247	<	assertEquals(0,ai.incrementAndGet());
248	<	assertEquals(1,ai.incrementAndGet());
249	<	assertEquals(1,ai.get());
241	>	/**
242	>	* floatValue returns current value.
243	>	*/
244	>	public void testFloatValue() {
245	>	AtomicInteger ai = new AtomicInteger();
246	>	assertEquals(0.0f, ai.floatValue());
247	>	for (int x : VALUES) {
248	>	ai.set(x);
249	>	assertEquals((float)x, ai.floatValue());
250	>	}
251		}
252
253	<	public void testSerialization() {
254	<	AtomicInteger l = new AtomicInteger();
255	<
256	<	try {
257	<	l.set(22);
258	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
259	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
260	<	out.writeObject(l);
261	<	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");
253	>	/**
254	>	* doubleValue returns current value.
255	>	*/
256	>	public void testDoubleValue() {
257	>	AtomicInteger ai = new AtomicInteger();
258	>	assertEquals(0.0d, ai.doubleValue());
259	>	for (int x : VALUES) {
260	>	ai.set(x);
261	>	assertEquals((double)x, ai.doubleValue());
262		}
263		}
264
139	–
265		}

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