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

Comparing jsr166/src/test/tck/AtomicLongTest.java (file contents):
Revision 1.2 by dl, Sun Sep 7 20:39:11 2003 UTC vs.
Revision 1.21 by jsr166, Fri May 27 16:43:23 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.*;
11		import java.io.*;
12
13	<	public class AtomicLongTest extends TestCase {
14	<	public static void main (String[] args) {
15	<	junit.textui.TestRunner.run (suite());
13	>	public class AtomicLongTest 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(AtomicLongTest.class);
19		}
20
21	<	public void testConstructor(){
22	<	AtomicLong ai = new AtomicLong(1);
23	<	assertEquals(1,ai.get());
24	<	}
25	<
26	<	public void testConstructor2(){
21	>	final long[] VALUES = {
22	>	Long.MIN_VALUE,
23	>	Integer.MIN_VALUE, -1, 0, 1, 42, Integer.MAX_VALUE,
24	>	Long.MAX_VALUE,
25	>	};
26	>
27	>	/**
28	>	* constructor initializes to given value
29	>	*/
30	>	public void testConstructor() {
31	>	AtomicLong ai = new AtomicLong(1);
32	>	assertEquals(1,ai.get());
33	>	}
34	>
35	>	/**
36	>	* default constructed initializes to zero
37	>	*/
38	>	public void testConstructor2() {
39		AtomicLong ai = new AtomicLong();
40	<	assertEquals(0,ai.get());
28	<	}
29	<
30	<	public void testGetSet(){
31	<	AtomicLong ai = new AtomicLong(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	<	AtomicLong ai = new AtomicLong(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	<	AtomicLong ai = new AtomicLong(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	<	AtomicLong ai = new AtomicLong(1);
61	<	assertEquals(1,ai.getAndSet(0));
62	<	assertEquals(0,ai.getAndSet(-10));
63	<	assertEquals(-10,ai.getAndSet(1));
40	>	assertEquals(0,ai.get());
41		}
42
43	<	public void testGetAndAdd(){
44	<	AtomicLong ai = new AtomicLong(1);
45	<	assertEquals(1,ai.getAndAdd(2));
46	<	assertEquals(3,ai.get());
47	<	assertEquals(3,ai.getAndAdd(-4));
48	<	assertEquals(-1,ai.get());
49	<	}
50	<
51	<	public void testGetAndDecrement(){
52	<	AtomicLong ai = new AtomicLong(1);
53	<	assertEquals(1,ai.getAndDecrement());
54	<	assertEquals(0,ai.getAndDecrement());
55	<	assertEquals(-1,ai.getAndDecrement());
56	<	}
43	>	/**
44	>	* get returns the last value set
45	>	*/
46	>	public void testGetSet() {
47	>	AtomicLong ai = new AtomicLong(1);
48	>	assertEquals(1,ai.get());
49	>	ai.set(2);
50	>	assertEquals(2,ai.get());
51	>	ai.set(-3);
52	>	assertEquals(-3,ai.get());
53	>	}
54	>
55	>	/**
56	>	* get returns the last value lazySet in same thread
57	>	*/
58	>	public void testGetLazySet() {
59	>	AtomicLong ai = new AtomicLong(1);
60	>	assertEquals(1,ai.get());
61	>	ai.lazySet(2);
62	>	assertEquals(2,ai.get());
63	>	ai.lazySet(-3);
64	>	assertEquals(-3,ai.get());
65	>	}
66	>
67	>	/**
68	>	* compareAndSet succeeds in changing value if equal to expected else fails
69	>	*/
70	>	public void testCompareAndSet() {
71	>	AtomicLong ai = new AtomicLong(1);
72	>	assertTrue(ai.compareAndSet(1,2));
73	>	assertTrue(ai.compareAndSet(2,-4));
74	>	assertEquals(-4,ai.get());
75	>	assertFalse(ai.compareAndSet(-5,7));
76	>	assertEquals(-4,ai.get());
77	>	assertTrue(ai.compareAndSet(-4,7));
78	>	assertEquals(7,ai.get());
79	>	}
80	>
81	>	/**
82	>	* compareAndSet in one thread enables another waiting for value
83	>	* to succeed
84	>	*/
85	>	public void testCompareAndSetInMultipleThreads() throws Exception {
86	>	final AtomicLong ai = new AtomicLong(1);
87	>	Thread t = new Thread(new CheckedRunnable() {
88	>	public void realRun() {
89	>	while (!ai.compareAndSet(2, 3))
90	>	Thread.yield();
91	>	}});
92	>
93	>	t.start();
94	>	assertTrue(ai.compareAndSet(1, 2));
95	>	t.join(LONG_DELAY_MS);
96	>	assertFalse(t.isAlive());
97	>	assertEquals(ai.get(), 3);
98	>	}
99	>
100	>	/**
101	>	* repeated weakCompareAndSet succeeds in changing value when equal
102	>	* to expected
103	>	*/
104	>	public void testWeakCompareAndSet() {
105	>	AtomicLong ai = new AtomicLong(1);
106	>	while (!ai.weakCompareAndSet(1,2));
107	>	while (!ai.weakCompareAndSet(2,-4));
108	>	assertEquals(-4,ai.get());
109	>	while (!ai.weakCompareAndSet(-4,7));
110	>	assertEquals(7,ai.get());
111	>	}
112	>
113	>	/**
114	>	* getAndSet returns previous value and sets to given value
115	>	*/
116	>	public void testGetAndSet() {
117	>	AtomicLong ai = new AtomicLong(1);
118	>	assertEquals(1,ai.getAndSet(0));
119	>	assertEquals(0,ai.getAndSet(-10));
120	>	assertEquals(-10,ai.getAndSet(1));
121	>	}
122	>
123	>	/**
124	>	* getAndAdd returns previous value and adds given value
125	>	*/
126	>	public void testGetAndAdd() {
127	>	AtomicLong ai = new AtomicLong(1);
128	>	assertEquals(1,ai.getAndAdd(2));
129	>	assertEquals(3,ai.get());
130	>	assertEquals(3,ai.getAndAdd(-4));
131	>	assertEquals(-1,ai.get());
132	>	}
133	>
134	>	/**
135	>	* getAndDecrement returns previous value and decrements
136	>	*/
137	>	public void testGetAndDecrement() {
138	>	AtomicLong ai = new AtomicLong(1);
139	>	assertEquals(1,ai.getAndDecrement());
140	>	assertEquals(0,ai.getAndDecrement());
141	>	assertEquals(-1,ai.getAndDecrement());
142	>	}
143	>
144	>	/**
145	>	* getAndIncrement returns previous value and increments
146	>	*/
147	>	public void testGetAndIncrement() {
148	>	AtomicLong ai = new AtomicLong(1);
149	>	assertEquals(1,ai.getAndIncrement());
150	>	assertEquals(2,ai.get());
151	>	ai.set(-2);
152	>	assertEquals(-2,ai.getAndIncrement());
153	>	assertEquals(-1,ai.getAndIncrement());
154	>	assertEquals(0,ai.getAndIncrement());
155	>	assertEquals(1,ai.get());
156	>	}
157	>
158	>	/**
159	>	* addAndGet adds given value to current, and returns current value
160	>	*/
161	>	public void testAddAndGet() {
162	>	AtomicLong ai = new AtomicLong(1);
163	>	assertEquals(3,ai.addAndGet(2));
164	>	assertEquals(3,ai.get());
165	>	assertEquals(-1,ai.addAndGet(-4));
166	>	assertEquals(-1,ai.get());
167	>	}
168	>
169	>	/**
170	>	* decrementAndGet decrements and returns current value
171	>	*/
172	>	public void testDecrementAndGet() {
173	>	AtomicLong ai = new AtomicLong(1);
174	>	assertEquals(0,ai.decrementAndGet());
175	>	assertEquals(-1,ai.decrementAndGet());
176	>	assertEquals(-2,ai.decrementAndGet());
177	>	assertEquals(-2,ai.get());
178	>	}
179	>
180	>	/**
181	>	* incrementAndGet increments and returns current value
182	>	*/
183	>	public void testIncrementAndGet() {
184	>	AtomicLong ai = new AtomicLong(1);
185	>	assertEquals(2,ai.incrementAndGet());
186	>	assertEquals(2,ai.get());
187	>	ai.set(-2);
188	>	assertEquals(-1,ai.incrementAndGet());
189	>	assertEquals(0,ai.incrementAndGet());
190	>	assertEquals(1,ai.incrementAndGet());
191	>	assertEquals(1,ai.get());
192	>	}
193	>
194	>	/**
195	>	* a deserialized serialized atomic holds same value
196	>	*/
197	>	public void testSerialization() throws Exception {
198	>	AtomicLong l = new AtomicLong();
199
200	<	public void testGetAndIncrement(){
201	<	AtomicLong ai = new AtomicLong(1);
202	<	assertEquals(1,ai.getAndIncrement());
203	<	assertEquals(2,ai.get());
204	<	ai.set(-2);
205	<	assertEquals(-2,ai.getAndIncrement());
206	<	assertEquals(-1,ai.getAndIncrement());
207	<	assertEquals(0,ai.getAndIncrement());
208	<	assertEquals(1,ai.get());
200	>	l.set(-22);
201	>	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
202	>	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
203	>	out.writeObject(l);
204	>	out.close();
205	>
206	>	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
207	>	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
208	>	AtomicLong r = (AtomicLong) in.readObject();
209	>	assertEquals(l.get(), r.get());
210	>	}
211	>
212	>	/**
213	>	* toString returns current value.
214	>	*/
215	>	public void testToString() {
216	>	AtomicLong ai = new AtomicLong();
217	>	assertEquals("0", ai.toString());
218	>	for (long i : VALUES) {
219	>	ai.set(i);
220	>	assertEquals(ai.toString(), Long.toString(i));
221	>	}
222		}
223
224	<	public void testAddAndGet(){
225	<	AtomicLong ai = new AtomicLong(1);
226	<	assertEquals(3,ai.addAndGet(2));
227	<	assertEquals(3,ai.get());
228	<	assertEquals(-1,ai.addAndGet(-4));
229	<	assertEquals(-1,ai.get());
224	>	/**
225	>	* intValue returns current value.
226	>	*/
227	>	public void testIntValue() {
228	>	AtomicLong ai = new AtomicLong();
229	>	assertEquals(0, ai.intValue());
230	>	for (long x : VALUES) {
231	>	ai.set(x);
232	>	assertEquals((int)x, ai.intValue());
233	>	}
234		}
235
236	<	public void testDecrementAndGet(){
237	<	AtomicLong ai = new AtomicLong(1);
238	<	assertEquals(0,ai.decrementAndGet());
239	<	assertEquals(-1,ai.decrementAndGet());
240	<	assertEquals(-2,ai.decrementAndGet());
241	<	assertEquals(-2,ai.get());
236	>	/**
237	>	* longValue returns current value.
238	>	*/
239	>	public void testLongValue() {
240	>	AtomicLong ai = new AtomicLong();
241	>	assertEquals(0L, ai.longValue());
242	>	for (long x : VALUES) {
243	>	ai.set(x);
244	>	assertEquals(x, ai.longValue());
245	>	}
246		}
247
248	<	public void testIncrementAndGet(){
249	<	AtomicLong ai = new AtomicLong(1);
250	<	assertEquals(2,ai.incrementAndGet());
251	<	assertEquals(2,ai.get());
252	<	ai.set(-2);
253	<	assertEquals(-1,ai.incrementAndGet());
254	<	assertEquals(0,ai.incrementAndGet());
255	<	assertEquals(1,ai.incrementAndGet());
256	<	assertEquals(1,ai.get());
248	>	/**
249	>	* floatValue returns current value.
250	>	*/
251	>	public void testFloatValue() {
252	>	AtomicLong ai = new AtomicLong();
253	>	assertEquals(0.0f, ai.floatValue());
254	>	for (long x : VALUES) {
255	>	ai.set(x);
256	>	assertEquals((float)x, ai.floatValue());
257	>	}
258		}
259
260	<	public void testSerialization() {
261	<	AtomicLong l = new AtomicLong();
262	<
263	<	try {
264	<	l.set(-22);
265	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
266	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
267	<	out.writeObject(l);
268	<	out.close();
128	<
129	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
130	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
131	<	AtomicLong r = (AtomicLong) in.readObject();
132	<	assertEquals(l.get(), r.get());
133	<	} catch(Exception e){
134	<	e.printStackTrace();
135	<	fail("unexpected exception");
260	>	/**
261	>	* doubleValue returns current value.
262	>	*/
263	>	public void testDoubleValue() {
264	>	AtomicLong ai = new AtomicLong();
265	>	assertEquals(0.0d, ai.doubleValue());
266	>	for (long x : VALUES) {
267	>	ai.set(x);
268	>	assertEquals((double)x, ai.doubleValue());
269		}
270		}
271

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