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

Comparing jsr166/src/test/tck/AtomicLongTest.java (file contents):
Revision 1.4 by dl, Sat Sep 20 18:20:07 2003 UTC vs.
Revision 1.24 by jsr166, Fri Jun 10 20:17:11 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 JSR166TestCase {
13	<	public static void main (String[] args) {
14	<	junit.textui.TestRunner.run (suite());
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	+	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	<	*
27	>	* constructor initializes to given value
28		*/
29	<	public void testConstructor(){
29	>	public void testConstructor() {
30		AtomicLong ai = new AtomicLong(1);
31	<	assertEquals(1,ai.get());
31	>	assertEquals(1, ai.get());
32		}
33
34		/**
35	<	*
35	>	* default constructed initializes to zero
36		*/
37	<	public void testConstructor2(){
37	>	public void testConstructor2() {
38		AtomicLong ai = new AtomicLong();
39	<	assertEquals(0,ai.get());
39	>	assertEquals(0, ai.get());
40	>	}
41	>
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	<	*
55	>	* get returns the last value lazySet in same thread
56		*/
57	<	public void testGetSet(){
57	>	public void testGetLazySet() {
58		AtomicLong ai = new AtomicLong(1);
59	<	assertEquals(1,ai.get());
60	<	ai.set(2);
61	<	assertEquals(2,ai.get());
62	<	ai.set(-3);
63	<	assertEquals(-3,ai.get());
46	<
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	<	*
67	>	* compareAndSet succeeds in changing value if equal to expected else fails
68		*/
69	<	public void testCompareAndSet(){
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	<	assertFalse((7 == ai.get()));
76	<	assertTrue(ai.compareAndSet(-4,7));
77	<	assertEquals(7,ai.get());
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	<	*
100	>	* repeated weakCompareAndSet succeeds in changing value when equal
101	>	* to expected
102		*/
103	<	public void testWeakCompareAndSet(){
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());
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	<	*
113	>	* getAndSet returns previous value and sets to given value
114		*/
115	<	public void testGetAndSet(){
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));
117	>	assertEquals(1, ai.getAndSet(0));
118	>	assertEquals(0, ai.getAndSet(-10));
119	>	assertEquals(-10, ai.getAndSet(1));
120		}
121
122		/**
123	<	*
123	>	* getAndAdd returns previous value and adds given value
124		*/
125	<	public void testGetAndAdd(){
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());
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	<	*
134	>	* getAndDecrement returns previous value and decrements
135		*/
136	<	public void testGetAndDecrement(){
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());
138	>	assertEquals(1, ai.getAndDecrement());
139	>	assertEquals(0, ai.getAndDecrement());
140	>	assertEquals(-1, ai.getAndDecrement());
141		}
142
143		/**
144	<	*
144	>	* getAndIncrement returns previous value and increments
145		*/
146	<	public void testGetAndIncrement(){
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());
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	<	*
158	>	* addAndGet adds given value to current, and returns current value
159		*/
160	<	public void testAddAndGet(){
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());
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	<	*
169	>	* decrementAndGet decrements and returns current value
170		*/
171	<	public void testDecrementAndGet(){
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());
173	>	assertEquals(0, ai.decrementAndGet());
174	>	assertEquals(-1, ai.decrementAndGet());
175	>	assertEquals(-2, ai.decrementAndGet());
176	>	assertEquals(-2, ai.get());
177		}
178
179		/**
180	<	*
180	>	* incrementAndGet increments and returns current value
181		*/
182	<	public void testIncrementAndGet(){
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());
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	<	*
194	>	* a deserialized serialized atomic holds same value
195		*/
196	<	public void testSerialization() {
197	<	AtomicLong l = new AtomicLong();
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	<	try {
208	<	l.set(-22);
209	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
210	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
211	<	out.writeObject(l);
212	<	out.close();
207	>	/**
208	>	* toString returns current value.
209	>	*/
210	>	public void testToString() {
211	>	AtomicLong ai = new AtomicLong();
212	>	assertEquals("0", ai.toString());
213	>	for (long i : VALUES) {
214	>	ai.set(i);
215	>	assertEquals(Long.toString(i), ai.toString());
216	>	}
217	>	}
218
219	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
220	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
221	<	AtomicLong r = (AtomicLong) in.readObject();
222	<	assertEquals(l.get(), r.get());
223	<	} catch(Exception e){
224	<	unexpectedException();
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	>	/**
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	>	/**
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	>	/**
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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