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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 1.25 by jsr166, Tue Aug 9 04:49:38 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.AtomicLong;
11
12	<	public class AtomicLongTest extends TestCase {
13	<	public static void main (String[] args) {
14	<	junit.textui.TestRunner.run (suite());
12	>	public class AtomicLongTest 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(AtomicLongTest.class);
18		}
19
20	<	public void testConstructor(){
21	<	AtomicLong ai = new AtomicLong(1);
22	<	assertEquals(1,ai.get());
23	<	}
24	<
25	<	public void testConstructor2(){
20	>	final long[] VALUES = {
21	>	Long.MIN_VALUE,
22	>	Integer.MIN_VALUE, -1, 0, 1, 42, Integer.MAX_VALUE,
23	>	Long.MAX_VALUE,
24	>	};
25	>
26	>	/**
27	>	* constructor initializes to given value
28	>	*/
29	>	public void testConstructor() {
30	>	AtomicLong ai = new AtomicLong(1);
31	>	assertEquals(1, ai.get());
32	>	}
33	>
34	>	/**
35	>	* default constructed initializes to zero
36	>	*/
37	>	public void testConstructor2() {
38		AtomicLong ai = new AtomicLong();
39	<	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));
39	>	assertEquals(0, ai.get());
40		}
41
42	<	public void testGetAndAdd(){
43	<	AtomicLong ai = new AtomicLong(1);
44	<	assertEquals(1,ai.getAndAdd(2));
45	<	assertEquals(3,ai.get());
46	<	assertEquals(3,ai.getAndAdd(-4));
47	<	assertEquals(-1,ai.get());
48	<	}
49	<
50	<	public void testGetAndDecrement(){
51	<	AtomicLong ai = new AtomicLong(1);
52	<	assertEquals(1,ai.getAndDecrement());
53	<	assertEquals(0,ai.getAndDecrement());
54	<	assertEquals(-1,ai.getAndDecrement());
55	<	}
56	<
57	<	public void testGetAndIncrement(){
58	<	AtomicLong ai = new AtomicLong(1);
59	<	assertEquals(1,ai.getAndIncrement());
60	<	assertEquals(2,ai.get());
61	<	ai.set(-2);
62	<	assertEquals(-2,ai.getAndIncrement());
63	<	assertEquals(-1,ai.getAndIncrement());
64	<	assertEquals(0,ai.getAndIncrement());
65	<	assertEquals(1,ai.get());
42	>	/**
43	>	* get returns the last value set
44	>	*/
45	>	public void testGetSet() {
46	>	AtomicLong ai = new AtomicLong(1);
47	>	assertEquals(1, ai.get());
48	>	ai.set(2);
49	>	assertEquals(2, ai.get());
50	>	ai.set(-3);
51	>	assertEquals(-3, ai.get());
52	>	}
53	>
54	>	/**
55	>	* get returns the last value lazySet in same thread
56	>	*/
57	>	public void testGetLazySet() {
58	>	AtomicLong ai = new AtomicLong(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	>	AtomicLong ai = new AtomicLong(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	>	assertEquals(-4, 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 AtomicLong ai = new AtomicLong(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(3, ai.get());
97	>	}
98	>
99	>	/**
100	>	* repeated weakCompareAndSet succeeds in changing value when equal
101	>	* to expected
102	>	*/
103	>	public void testWeakCompareAndSet() {
104	>	AtomicLong ai = new AtomicLong(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	>	AtomicLong ai = new AtomicLong(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	>	AtomicLong ai = new AtomicLong(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	>	AtomicLong ai = new AtomicLong(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	>	AtomicLong ai = new AtomicLong(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	>	AtomicLong ai = new AtomicLong(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	>	AtomicLong ai = new AtomicLong(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	>	AtomicLong ai = new AtomicLong(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	>	AtomicLong x = new AtomicLong();
198	>	AtomicLong y = serialClone(x);
199	>	assertTrue(x != y);
200	>	x.set(-22);
201	>	AtomicLong z = serialClone(x);
202	>	assertEquals(-22, x.get());
203	>	assertEquals(0, y.get());
204	>	assertEquals(-22, z.get());
205	>	}
206	>
207	>	/**
208	>	* toString returns current value.
209	>	*/
210	>	public void testToString() {
211	>	AtomicLong ai = new AtomicLong();
212	>	assertEquals("0", ai.toString());
213	>	for (long x : VALUES) {
214	>	ai.set(x);
215	>	assertEquals(Long.toString(x), ai.toString());
216	>	}
217		}
218
219	<	public void testAddAndGet(){
220	<	AtomicLong ai = new AtomicLong(1);
221	<	assertEquals(3,ai.addAndGet(2));
222	<	assertEquals(3,ai.get());
223	<	assertEquals(-1,ai.addAndGet(-4));
224	<	assertEquals(-1,ai.get());
219	>	/**
220	>	* intValue returns current value.
221	>	*/
222	>	public void testIntValue() {
223	>	AtomicLong ai = new AtomicLong();
224	>	assertEquals(0, ai.intValue());
225	>	for (long x : VALUES) {
226	>	ai.set(x);
227	>	assertEquals((int)x, ai.intValue());
228	>	}
229		}
230
231	<	public void testDecrementAndGet(){
232	<	AtomicLong ai = new AtomicLong(1);
233	<	assertEquals(0,ai.decrementAndGet());
234	<	assertEquals(-1,ai.decrementAndGet());
235	<	assertEquals(-2,ai.decrementAndGet());
236	<	assertEquals(-2,ai.get());
231	>	/**
232	>	* longValue returns current value.
233	>	*/
234	>	public void testLongValue() {
235	>	AtomicLong ai = new AtomicLong();
236	>	assertEquals(0L, ai.longValue());
237	>	for (long x : VALUES) {
238	>	ai.set(x);
239	>	assertEquals(x, ai.longValue());
240	>	}
241		}
242
243	<	public void testIncrementAndGet(){
244	<	AtomicLong ai = new AtomicLong(1);
245	<	assertEquals(2,ai.incrementAndGet());
246	<	assertEquals(2,ai.get());
247	<	ai.set(-2);
248	<	assertEquals(-1,ai.incrementAndGet());
249	<	assertEquals(0,ai.incrementAndGet());
250	<	assertEquals(1,ai.incrementAndGet());
251	<	assertEquals(1,ai.get());
243	>	/**
244	>	* floatValue returns current value.
245	>	*/
246	>	public void testFloatValue() {
247	>	AtomicLong ai = new AtomicLong();
248	>	assertEquals(0.0f, ai.floatValue());
249	>	for (long x : VALUES) {
250	>	ai.set(x);
251	>	assertEquals((float)x, ai.floatValue());
252	>	}
253		}
254
255	<	public void testSerialization() {
256	<	AtomicLong l = new AtomicLong();
257	<
258	<	try {
259	<	l.set(-22);
260	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
261	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
262	<	out.writeObject(l);
263	<	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");
255	>	/**
256	>	* doubleValue returns current value.
257	>	*/
258	>	public void testDoubleValue() {
259	>	AtomicLong ai = new AtomicLong();
260	>	assertEquals(0.0d, ai.doubleValue());
261	>	for (long x : VALUES) {
262	>	ai.set(x);
263	>	assertEquals((double)x, ai.doubleValue());
264		}
265		}
266

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