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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 1.16 by jsr166, Sat Nov 21 02:07:26 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 AtomicLongTest extends TestCase {
13	>	public class AtomicLongTest extends JSR166TestCase {
14		public static void main (String[] args) {
15		junit.textui.TestRunner.run (suite());
16		}
#	Line 17 | Line 18 | public class AtomicLongTest extends Test
18		return new TestSuite(AtomicLongTest.class);
19		}
20
21	<	public void testConstructor(){
22	<	AtomicLong ai = new AtomicLong(1);
23	<	assertEquals(1,ai.get());
21	>	/**
22	>	* constructor initializes to given value
23	>	*/
24	>	public void testConstructor() {
25	>	AtomicLong ai = new AtomicLong(1);
26	>	assertEquals(1,ai.get());
27		}
28
29	<	public void testConstructor2(){
29	>	/**
30	>	* default constructed initializes to zero
31	>	*/
32	>	public void testConstructor2() {
33		AtomicLong ai = new AtomicLong();
34	<	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));
64	<	}
65	<
66	<	public void testGetAndAdd(){
67	<	AtomicLong ai = new AtomicLong(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	<	AtomicLong ai = new AtomicLong(1);
76	<	assertEquals(1,ai.getAndDecrement());
77	<	assertEquals(0,ai.getAndDecrement());
78	<	assertEquals(-1,ai.getAndDecrement());
34	>	assertEquals(0,ai.get());
35		}
36
37	<	public void testGetAndIncrement(){
38	<	AtomicLong ai = new AtomicLong(1);
39	<	assertEquals(1,ai.getAndIncrement());
40	<	assertEquals(2,ai.get());
41	<	ai.set(-2);
42	<	assertEquals(-2,ai.getAndIncrement());
43	<	assertEquals(-1,ai.getAndIncrement());
44	<	assertEquals(0,ai.getAndIncrement());
45	<	assertEquals(1,ai.get());
46	<	}
37	>	/**
38	>	* get returns the last value set
39	>	*/
40	>	public void testGetSet() {
41	>	AtomicLong ai = new AtomicLong(1);
42	>	assertEquals(1,ai.get());
43	>	ai.set(2);
44	>	assertEquals(2,ai.get());
45	>	ai.set(-3);
46	>	assertEquals(-3,ai.get());
47	>
48	>	}
49	>
50	>	/**
51	>	* get returns the last value lazySet in same thread
52	>	*/
53	>	public void testGetLazySet() {
54	>	AtomicLong ai = new AtomicLong(1);
55	>	assertEquals(1,ai.get());
56	>	ai.lazySet(2);
57	>	assertEquals(2,ai.get());
58	>	ai.lazySet(-3);
59	>	assertEquals(-3,ai.get());
60	>
61	>	}
62	>
63	>	/**
64	>	* compareAndSet succeeds in changing value if equal to expected else fails
65	>	*/
66	>	public void testCompareAndSet() {
67	>	AtomicLong ai = new AtomicLong(1);
68	>	assertTrue(ai.compareAndSet(1,2));
69	>	assertTrue(ai.compareAndSet(2,-4));
70	>	assertEquals(-4,ai.get());
71	>	assertFalse(ai.compareAndSet(-5,7));
72	>	assertFalse((7 == ai.get()));
73	>	assertTrue(ai.compareAndSet(-4,7));
74	>	assertEquals(7,ai.get());
75	>	}
76	>
77	>	/**
78	>	* compareAndSet in one thread enables another waiting for value
79	>	* to succeed
80	>	*/
81	>	public void testCompareAndSetInMultipleThreads() throws Exception {
82	>	final AtomicLong ai = new AtomicLong(1);
83	>	Thread t = new Thread(new CheckedRunnable() {
84	>	public void realRun() {
85	>	while (!ai.compareAndSet(2, 3))
86	>	Thread.yield();
87	>	}});
88	>
89	>	t.start();
90	>	assertTrue(ai.compareAndSet(1, 2));
91	>	t.join(LONG_DELAY_MS);
92	>	assertFalse(t.isAlive());
93	>	assertEquals(ai.get(), 3);
94	>	}
95	>
96	>	/**
97	>	* repeated weakCompareAndSet succeeds in changing value when equal
98	>	* to expected
99	>	*/
100	>	public void testWeakCompareAndSet() {
101	>	AtomicLong ai = new AtomicLong(1);
102	>	while (!ai.weakCompareAndSet(1,2));
103	>	while (!ai.weakCompareAndSet(2,-4));
104	>	assertEquals(-4,ai.get());
105	>	while (!ai.weakCompareAndSet(-4,7));
106	>	assertEquals(7,ai.get());
107	>	}
108	>
109	>	/**
110	>	* getAndSet returns previous value and sets to given value
111	>	*/
112	>	public void testGetAndSet() {
113	>	AtomicLong ai = new AtomicLong(1);
114	>	assertEquals(1,ai.getAndSet(0));
115	>	assertEquals(0,ai.getAndSet(-10));
116	>	assertEquals(-10,ai.getAndSet(1));
117	>	}
118	>
119	>	/**
120	>	* getAndAdd returns previous value and adds given value
121	>	*/
122	>	public void testGetAndAdd() {
123	>	AtomicLong ai = new AtomicLong(1);
124	>	assertEquals(1,ai.getAndAdd(2));
125	>	assertEquals(3,ai.get());
126	>	assertEquals(3,ai.getAndAdd(-4));
127	>	assertEquals(-1,ai.get());
128	>	}
129	>
130	>	/**
131	>	* getAndDecrement returns previous value and decrements
132	>	*/
133	>	public void testGetAndDecrement() {
134	>	AtomicLong ai = new AtomicLong(1);
135	>	assertEquals(1,ai.getAndDecrement());
136	>	assertEquals(0,ai.getAndDecrement());
137	>	assertEquals(-1,ai.getAndDecrement());
138	>	}
139	>
140	>	/**
141	>	* getAndIncrement returns previous value and increments
142	>	*/
143	>	public void testGetAndIncrement() {
144	>	AtomicLong ai = new AtomicLong(1);
145	>	assertEquals(1,ai.getAndIncrement());
146	>	assertEquals(2,ai.get());
147	>	ai.set(-2);
148	>	assertEquals(-2,ai.getAndIncrement());
149	>	assertEquals(-1,ai.getAndIncrement());
150	>	assertEquals(0,ai.getAndIncrement());
151	>	assertEquals(1,ai.get());
152	>	}
153	>
154	>	/**
155	>	* addAndGet adds given value to current, and returns current value
156	>	*/
157	>	public void testAddAndGet() {
158	>	AtomicLong ai = new AtomicLong(1);
159	>	assertEquals(3,ai.addAndGet(2));
160	>	assertEquals(3,ai.get());
161	>	assertEquals(-1,ai.addAndGet(-4));
162	>	assertEquals(-1,ai.get());
163	>	}
164	>
165	>	/**
166	>	* decrementAndGet decrements and returns current value
167	>	*/
168	>	public void testDecrementAndGet() {
169	>	AtomicLong ai = new AtomicLong(1);
170	>	assertEquals(0,ai.decrementAndGet());
171	>	assertEquals(-1,ai.decrementAndGet());
172	>	assertEquals(-2,ai.decrementAndGet());
173	>	assertEquals(-2,ai.get());
174	>	}
175	>
176	>	/**
177	>	* incrementAndGet increments and returns current value
178	>	*/
179	>	public void testIncrementAndGet() {
180	>	AtomicLong ai = new AtomicLong(1);
181	>	assertEquals(2,ai.incrementAndGet());
182	>	assertEquals(2,ai.get());
183	>	ai.set(-2);
184	>	assertEquals(-1,ai.incrementAndGet());
185	>	assertEquals(0,ai.incrementAndGet());
186	>	assertEquals(1,ai.incrementAndGet());
187	>	assertEquals(1,ai.get());
188	>	}
189	>
190	>	/**
191	>	* a deserialized serialized atomic holds same value
192	>	*/
193	>	public void testSerialization() throws Exception {
194	>	AtomicLong l = new AtomicLong();
195
196	<	public void testAddAndGet(){
197	<	AtomicLong ai = new AtomicLong(1);
198	<	assertEquals(3,ai.addAndGet(2));
199	<	assertEquals(3,ai.get());
200	<	assertEquals(-1,ai.addAndGet(-4));
201	<	assertEquals(-1,ai.get());
196	>	l.set(-22);
197	>	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
198	>	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
199	>	out.writeObject(l);
200	>	out.close();
201	>
202	>	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
203	>	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
204	>	AtomicLong r = (AtomicLong) in.readObject();
205	>	assertEquals(l.get(), r.get());
206	>	}
207	>
208	>	/**
209	>	* toString returns current value.
210	>	*/
211	>	public void testToString() {
212	>	AtomicLong ai = new AtomicLong();
213	>	for (long i = -12; i < 6; ++i) {
214	>	ai.set(i);
215	>	assertEquals(ai.toString(), Long.toString(i));
216	>	}
217		}
218
219	<	public void testDecrementAndGet(){
220	<	AtomicLong ai = new AtomicLong(1);
221	<	assertEquals(0,ai.decrementAndGet());
222	<	assertEquals(-1,ai.decrementAndGet());
223	<	assertEquals(-2,ai.decrementAndGet());
224	<	assertEquals(-2,ai.get());
219	>	/**
220	>	* longValue returns current value.
221	>	*/
222	>	public void testLongValue() {
223	>	AtomicLong ai = new AtomicLong();
224	>	for (int i = -12; i < 6; ++i) {
225	>	ai.set(i);
226	>	assertEquals((long)i, ai.longValue());
227	>	}
228		}
229
230	<	public void testIncrementAndGet(){
231	<	AtomicLong ai = new AtomicLong(1);
232	<	assertEquals(2,ai.incrementAndGet());
233	<	assertEquals(2,ai.get());
234	<	ai.set(-2);
235	<	assertEquals(-1,ai.incrementAndGet());
236	<	assertEquals(0,ai.incrementAndGet());
237	<	assertEquals(1,ai.incrementAndGet());
238	<	assertEquals(1,ai.get());
230	>	/**
231	>	* floatValue returns current value.
232	>	*/
233	>	public void testFloatValue() {
234	>	AtomicLong ai = new AtomicLong();
235	>	for (int i = -12; i < 6; ++i) {
236	>	ai.set(i);
237	>	assertEquals((float)i, ai.floatValue());
238	>	}
239		}
240
241	<	public void testSerialization() {
242	<	AtomicLong l = new AtomicLong();
243	<
244	<	try {
245	<	l.set(-22);
246	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
247	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
248	<	out.writeObject(l);
127	<	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");
241	>	/**
242	>	* doubleValue returns current value.
243	>	*/
244	>	public void testDoubleValue() {
245	>	AtomicLong ai = new AtomicLong();
246	>	for (int i = -12; i < 6; ++i) {
247	>	ai.set(i);
248	>	assertEquals((double)i, ai.doubleValue());
249		}
250		}
251
252	+
253		}

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