ViewVC Help

View File | Revision Log | Show Annotations | Download File | Root Listing

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 1.21 by jsr166, Tue Mar 15 19:47:06 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.*;
11		import java.io.*;
12
13	<	public class AtomicIntegerTest extends TestCase {
14	<	public static void main (String[] args) {
15	<	junit.textui.TestRunner.run (suite());
13	>	public class AtomicIntegerTest extends JSR166TestCase {
14	>	public static void main(String[] args) {
15	>	junit.textui.TestRunner.run(suite());
16		}
17		public static Test suite() {
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	>	* get returns the last value lazySet in same thread
55	>	*/
56	>	public void testGetLazySet() {
57	>	AtomicInteger ai = new AtomicInteger(1);
58	>	assertEquals(1,ai.get());
59	>	ai.lazySet(2);
60	>	assertEquals(2,ai.get());
61	>	ai.lazySet(-3);
62	>	assertEquals(-3,ai.get());
63	>	}
64	>
65	>	/**
66	>	* compareAndSet succeeds in changing value if equal to expected else fails
67	>	*/
68	>	public void testCompareAndSet() {
69	>	AtomicInteger ai = new AtomicInteger(1);
70	>	assertTrue(ai.compareAndSet(1,2));
71	>	assertTrue(ai.compareAndSet(2,-4));
72	>	assertEquals(-4,ai.get());
73	>	assertFalse(ai.compareAndSet(-5,7));
74	>	assertEquals(-4,ai.get());
75	>	assertTrue(ai.compareAndSet(-4,7));
76	>	assertEquals(7,ai.get());
77	>	}
78	>
79	>	/**
80	>	* compareAndSet in one thread enables another waiting for value
81	>	* to succeed
82	>	*/
83	>	public void testCompareAndSetInMultipleThreads() throws Exception {
84	>	final AtomicInteger ai = new AtomicInteger(1);
85	>	Thread t = new Thread(new CheckedRunnable() {
86	>	public void realRun() {
87	>	while (!ai.compareAndSet(2, 3))
88	>	Thread.yield();
89	>	}});
90	>
91	>	t.start();
92	>	assertTrue(ai.compareAndSet(1, 2));
93	>	t.join(LONG_DELAY_MS);
94	>	assertFalse(t.isAlive());
95	>	assertEquals(ai.get(), 3);
96	>	}
97	>
98	>	/**
99	>	* repeated weakCompareAndSet succeeds in changing value when equal
100	>	* to expected
101	>	*/
102	>	public void testWeakCompareAndSet() {
103	>	AtomicInteger ai = new AtomicInteger(1);
104	>	while (!ai.weakCompareAndSet(1,2));
105	>	while (!ai.weakCompareAndSet(2,-4));
106	>	assertEquals(-4,ai.get());
107	>	while (!ai.weakCompareAndSet(-4,7));
108	>	assertEquals(7,ai.get());
109	>	}
110	>
111	>	/**
112	>	* getAndSet returns previous value and sets to given value
113	>	*/
114	>	public void testGetAndSet() {
115	>	AtomicInteger ai = new AtomicInteger(1);
116	>	assertEquals(1,ai.getAndSet(0));
117	>	assertEquals(0,ai.getAndSet(-10));
118	>	assertEquals(-10,ai.getAndSet(1));
119	>	}
120	>
121	>	/**
122	>	* getAndAdd returns previous value and adds given value
123	>	*/
124	>	public void testGetAndAdd() {
125	>	AtomicInteger ai = new AtomicInteger(1);
126	>	assertEquals(1,ai.getAndAdd(2));
127	>	assertEquals(3,ai.get());
128	>	assertEquals(3,ai.getAndAdd(-4));
129	>	assertEquals(-1,ai.get());
130	>	}
131	>
132	>	/**
133	>	* getAndDecrement returns previous value and decrements
134	>	*/
135	>	public void testGetAndDecrement() {
136	>	AtomicInteger ai = new AtomicInteger(1);
137	>	assertEquals(1,ai.getAndDecrement());
138	>	assertEquals(0,ai.getAndDecrement());
139	>	assertEquals(-1,ai.getAndDecrement());
140	>	}
141	>
142	>	/**
143	>	* getAndIncrement returns previous value and increments
144	>	*/
145	>	public void testGetAndIncrement() {
146	>	AtomicInteger ai = new AtomicInteger(1);
147	>	assertEquals(1,ai.getAndIncrement());
148	>	assertEquals(2,ai.get());
149	>	ai.set(-2);
150	>	assertEquals(-2,ai.getAndIncrement());
151	>	assertEquals(-1,ai.getAndIncrement());
152	>	assertEquals(0,ai.getAndIncrement());
153	>	assertEquals(1,ai.get());
154	>	}
155	>
156	>	/**
157	>	* addAndGet adds given value to current, and returns current value
158	>	*/
159	>	public void testAddAndGet() {
160	>	AtomicInteger ai = new AtomicInteger(1);
161	>	assertEquals(3,ai.addAndGet(2));
162	>	assertEquals(3,ai.get());
163	>	assertEquals(-1,ai.addAndGet(-4));
164	>	assertEquals(-1,ai.get());
165	>	}
166	>
167	>	/**
168	>	* decrementAndGet decrements and returns current value
169	>	*/
170	>	public void testDecrementAndGet() {
171	>	AtomicInteger ai = new AtomicInteger(1);
172	>	assertEquals(0,ai.decrementAndGet());
173	>	assertEquals(-1,ai.decrementAndGet());
174	>	assertEquals(-2,ai.decrementAndGet());
175	>	assertEquals(-2,ai.get());
176	>	}
177	>
178	>	/**
179	>	* incrementAndGet increments and returns current value
180	>	*/
181	>	public void testIncrementAndGet() {
182	>	AtomicInteger ai = new AtomicInteger(1);
183	>	assertEquals(2,ai.incrementAndGet());
184	>	assertEquals(2,ai.get());
185	>	ai.set(-2);
186	>	assertEquals(-1,ai.incrementAndGet());
187	>	assertEquals(0,ai.incrementAndGet());
188	>	assertEquals(1,ai.incrementAndGet());
189	>	assertEquals(1,ai.get());
190	>	}
191	>
192	>	/**
193	>	* a deserialized serialized atomic holds same value
194	>	*/
195	>	public void testSerialization() throws Exception {
196	>	AtomicInteger l = new AtomicInteger();
197
198	<	public void testGetAndIncrement(){
199	<	AtomicInteger ai = new AtomicInteger(1);
200	<	assertEquals(1,ai.getAndIncrement());
201	<	assertEquals(2,ai.get());
202	<	ai.set(-2);
203	<	assertEquals(-2,ai.getAndIncrement());
204	<	assertEquals(-1,ai.getAndIncrement());
205	<	assertEquals(0,ai.getAndIncrement());
206	<	assertEquals(1,ai.get());
198	>	l.set(22);
199	>	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
200	>	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
201	>	out.writeObject(l);
202	>	out.close();
203	>
204	>	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
205	>	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
206	>	AtomicInteger r = (AtomicInteger) in.readObject();
207	>	assertEquals(l.get(), r.get());
208	>	}
209	>
210	>	/**
211	>	* toString returns current value.
212	>	*/
213	>	public void testToString() {
214	>	AtomicInteger ai = new AtomicInteger();
215	>	assertEquals("0", ai.toString());
216	>	for (int x : VALUES) {
217	>	ai.set(x);
218	>	assertEquals(ai.toString(), Integer.toString(x));
219	>	}
220		}
221
222	<	public void testAddAndGet(){
223	<	AtomicInteger ai = new AtomicInteger(1);
224	<	assertEquals(3,ai.addAndGet(2));
225	<	assertEquals(3,ai.get());
226	<	assertEquals(-1,ai.addAndGet(-4));
227	<	assertEquals(-1,ai.get());
222	>	/**
223	>	* intValue returns current value.
224	>	*/
225	>	public void testIntValue() {
226	>	AtomicInteger ai = new AtomicInteger();
227	>	assertEquals(0, ai.intValue());
228	>	for (int x : VALUES) {
229	>	ai.set(x);
230	>	assertEquals(x, ai.intValue());
231	>	}
232		}
233
234	<	public void testDecrementAndGet(){
235	<	AtomicInteger ai = new AtomicInteger(1);
236	<	assertEquals(0,ai.decrementAndGet());
237	<	assertEquals(-1,ai.decrementAndGet());
238	<	assertEquals(-2,ai.decrementAndGet());
239	<	assertEquals(-2,ai.get());
234	>	/**
235	>	* longValue returns current value.
236	>	*/
237	>	public void testLongValue() {
238	>	AtomicInteger ai = new AtomicInteger();
239	>	assertEquals(0L, ai.longValue());
240	>	for (int x : VALUES) {
241	>	ai.set(x);
242	>	assertEquals((long)x, ai.longValue());
243	>	}
244		}
245
246	<	public void testIncrementAndGet(){
247	<	AtomicInteger ai = new AtomicInteger(1);
248	<	assertEquals(2,ai.incrementAndGet());
249	<	assertEquals(2,ai.get());
250	<	ai.set(-2);
251	<	assertEquals(-1,ai.incrementAndGet());
252	<	assertEquals(0,ai.incrementAndGet());
253	<	assertEquals(1,ai.incrementAndGet());
254	<	assertEquals(1,ai.get());
246	>	/**
247	>	* floatValue returns current value.
248	>	*/
249	>	public void testFloatValue() {
250	>	AtomicInteger ai = new AtomicInteger();
251	>	assertEquals(0.0f, ai.floatValue());
252	>	for (int x : VALUES) {
253	>	ai.set(x);
254	>	assertEquals((float)x, ai.floatValue());
255	>	}
256		}
257
258	<	public void testSerialization() {
259	<	AtomicInteger l = new AtomicInteger();
260	<
261	<	try {
262	<	l.set(22);
263	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
264	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
265	<	out.writeObject(l);
266	<	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");
258	>	/**
259	>	* doubleValue returns current value.
260	>	*/
261	>	public void testDoubleValue() {
262	>	AtomicInteger ai = new AtomicInteger();
263	>	assertEquals(0.0d, ai.doubleValue());
264	>	for (int x : VALUES) {
265	>	ai.set(x);
266	>	assertEquals((double)x, ai.doubleValue());
267		}
268		}
269
139	–
270		}

Diff Legend

–	Removed lines
+	Added lines
<	Changed lines
>	Changed lines