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

Comparing jsr166/src/test/tck/AtomicLongTest.java (file contents):
Revision 1.10 by dl, Wed May 25 14:27:37 2005 UTC vs.
Revision 1.23 by jsr166, Fri Jun 10 20:01:21 2011 UTC

#	Line 1 | Line 1
1		/*
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.
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.*;
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		* 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		* 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(){
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());
47	<
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(){
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());
60	<
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(){
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() {
84	>	public void testCompareAndSetInMultipleThreads() throws Exception {
85		final AtomicLong ai = new AtomicLong(1);
86	<	Thread t = new Thread(new Runnable() {
87	<	public void run() {
88	<	while(!ai.compareAndSet(2, 3)) Thread.yield();
89	<	}});
90	<	try {
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	<	}
94	<	catch(Exception e) {
95	<	unexpectedException();
96	<	}
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
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		* 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		* 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		* 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		* 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		* 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		* 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		* 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		* a deserialized serialized atomic holds same value
195		*/
196	<	public void testSerialization() {
197	<	AtomicLong l = new AtomicLong();
198	<
199	<	try {
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	<	} catch(Exception e){
211	<	unexpectedException();
212	<	}
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	<	*/
209	>	*/
210		public void testToString() {
211		AtomicLong ai = new AtomicLong();
212	<	for (long i = -12; i < 6; ++i) {
212	>	assertEquals("0", ai.toString());
213	>	for (long i : VALUES) {
214		ai.set(i);
215		assertEquals(ai.toString(), Long.toString(i));
216		}
217		}
218
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	<	*/
233	>	*/
234		public void testLongValue() {
235		AtomicLong ai = new AtomicLong();
236	<	for (int i = -12; i < 6; ++i) {
237	<	ai.set(i);
238	<	assertEquals((long)i, ai.longValue());
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	<	*/
245	>	*/
246		public void testFloatValue() {
247		AtomicLong ai = new AtomicLong();
248	<	for (int i = -12; i < 6; ++i) {
249	<	ai.set(i);
250	<	assertEquals((float)i, ai.floatValue());
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	<	*/
257	>	*/
258		public void testDoubleValue() {
259		AtomicLong ai = new AtomicLong();
260	<	for (int i = -12; i < 6; ++i) {
261	<	ai.set(i);
262	<	assertEquals((double)i, ai.doubleValue());
260	>	assertEquals(0.0d, ai.doubleValue());
261	>	for (long x : VALUES) {
262	>	ai.set(x);
263	>	assertEquals((double)x, ai.doubleValue());
264		}
265		}
266
259	–
267		}

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