ViewVC Help

View File | Revision Log | Show Annotations | Download File | Root Listing

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

Comparing jsr166/src/test/tck/AtomicIntegerTest.java (file contents):
Revision 1.4 by dl, Sat Sep 20 18:20:07 2003 UTC vs.
Revision 1.21 by jsr166, Tue Mar 15 19:47:06 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.*;
#	Line 10 | Line 11 | import java.util.concurrent.atomic.*;
11		import java.io.*;
12
13		public class AtomicIntegerTest extends JSR166TestCase {
14	<	public static void main (String[] args) {
15	<	junit.textui.TestRunner.run (suite());
14	>	public static void main(String[] args) {
15	>	junit.textui.TestRunner.run(suite());
16		}
17		public static Test suite() {
18		return new TestSuite(AtomicIntegerTest.class);
19		}
20
21	+	final int[] VALUES = {
22	+	Integer.MIN_VALUE, -1, 0, 1, 42, Integer.MAX_VALUE,
23	+	};
24	+
25		/**
26	<	*
26	>	* constructor initializes to given value
27		*/
28	<	public void testConstructor(){
28	>	public void testConstructor() {
29		AtomicInteger ai = new AtomicInteger(1);
30	<	assertEquals(1,ai.get());
30	>	assertEquals(1,ai.get());
31		}
32
33		/**
34	<	*
34	>	* default constructed initializes to zero
35		*/
36	<	public void testConstructor2(){
36	>	public void testConstructor2() {
37		AtomicInteger ai = new AtomicInteger();
38	<	assertEquals(0,ai.get());
38	>	assertEquals(0,ai.get());
39		}
40
41		/**
42	<	*
42	>	* get returns the last value set
43		*/
44	<	public void testGetSet(){
44	>	public void testGetSet() {
45		AtomicInteger ai = new AtomicInteger(1);
46	<	assertEquals(1,ai.get());
47	<	ai.set(2);
48	<	assertEquals(2,ai.get());
49	<	ai.set(-3);
50	<	assertEquals(-3,ai.get());
46	<
46	>	assertEquals(1,ai.get());
47	>	ai.set(2);
48	>	assertEquals(2,ai.get());
49	>	ai.set(-3);
50	>	assertEquals(-3,ai.get());
51		}
52	+
53		/**
54	<	*
54	>	* get returns the last value lazySet in same thread
55		*/
56	<	public void testCompareAndSet(){
56	>	public void testGetLazySet() {
57		AtomicInteger ai = new AtomicInteger(1);
58	<	assertTrue(ai.compareAndSet(1,2));
59	<	assertTrue(ai.compareAndSet(2,-4));
60	<	assertEquals(-4,ai.get());
61	<	assertFalse(ai.compareAndSet(-5,7));
62	<	assertFalse((7 == ai.get()));
58	<	assertTrue(ai.compareAndSet(-4,7));
59	<	assertEquals(7,ai.get());
58	>	assertEquals(1,ai.get());
59	>	ai.lazySet(2);
60	>	assertEquals(2,ai.get());
61	>	ai.lazySet(-3);
62	>	assertEquals(-3,ai.get());
63		}
64
65		/**
66	<	*
66	>	* compareAndSet succeeds in changing value if equal to expected else fails
67		*/
68	<	public void testWeakCompareAndSet(){
68	>	public void testCompareAndSet() {
69		AtomicInteger ai = new AtomicInteger(1);
70	<	while(!ai.weakCompareAndSet(1,2));
71	<	while(!ai.weakCompareAndSet(2,-4));
72	<	assertEquals(-4,ai.get());
73	<	while(!ai.weakCompareAndSet(-4,7));
74	<	assertEquals(7,ai.get());
70	>	assertTrue(ai.compareAndSet(1,2));
71	>	assertTrue(ai.compareAndSet(2,-4));
72	>	assertEquals(-4,ai.get());
73	>	assertFalse(ai.compareAndSet(-5,7));
74	>	assertEquals(-4,ai.get());
75	>	assertTrue(ai.compareAndSet(-4,7));
76	>	assertEquals(7,ai.get());
77		}
78
79		/**
80	<	*
80	>	* compareAndSet in one thread enables another waiting for value
81	>	* to succeed
82		*/
83	<	public void testGetAndSet(){
83	>	public void testCompareAndSetInMultipleThreads() throws Exception {
84	>	final AtomicInteger ai = new AtomicInteger(1);
85	>	Thread t = new Thread(new CheckedRunnable() {
86	>	public void realRun() {
87	>	while (!ai.compareAndSet(2, 3))
88	>	Thread.yield();
89	>	}});
90	>
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	>	}
97	>
98	>	/**
99	>	* repeated weakCompareAndSet succeeds in changing value when equal
100	>	* to expected
101	>	*/
102	>	public void testWeakCompareAndSet() {
103		AtomicInteger ai = new AtomicInteger(1);
104	<	assertEquals(1,ai.getAndSet(0));
105	<	assertEquals(0,ai.getAndSet(-10));
106	<	assertEquals(-10,ai.getAndSet(1));
104	>	while (!ai.weakCompareAndSet(1,2));
105	>	while (!ai.weakCompareAndSet(2,-4));
106	>	assertEquals(-4,ai.get());
107	>	while (!ai.weakCompareAndSet(-4,7));
108	>	assertEquals(7,ai.get());
109		}
110
111		/**
112	<	*
112	>	* getAndSet returns previous value and sets to given value
113		*/
114	<	public void testGetAndAdd(){
114	>	public void testGetAndSet() {
115		AtomicInteger ai = new AtomicInteger(1);
116	<	assertEquals(1,ai.getAndAdd(2));
117	<	assertEquals(3,ai.get());
118	<	assertEquals(3,ai.getAndAdd(-4));
92	<	assertEquals(-1,ai.get());
116	>	assertEquals(1,ai.getAndSet(0));
117	>	assertEquals(0,ai.getAndSet(-10));
118	>	assertEquals(-10,ai.getAndSet(1));
119		}
120
121		/**
122	<	*
122	>	* getAndAdd returns previous value and adds given value
123		*/
124	<	public void testGetAndDecrement(){
124	>	public void testGetAndAdd() {
125		AtomicInteger ai = new AtomicInteger(1);
126	<	assertEquals(1,ai.getAndDecrement());
127	<	assertEquals(0,ai.getAndDecrement());
128	<	assertEquals(-1,ai.getAndDecrement());
126	>	assertEquals(1,ai.getAndAdd(2));
127	>	assertEquals(3,ai.get());
128	>	assertEquals(3,ai.getAndAdd(-4));
129	>	assertEquals(-1,ai.get());
130		}
131
132		/**
133	<	*
133	>	* getAndDecrement returns previous value and decrements
134		*/
135	<	public void testGetAndIncrement(){
135	>	public void testGetAndDecrement() {
136		AtomicInteger ai = new AtomicInteger(1);
137	<	assertEquals(1,ai.getAndIncrement());
138	<	assertEquals(2,ai.get());
139	<	ai.set(-2);
113	<	assertEquals(-2,ai.getAndIncrement());
114	<	assertEquals(-1,ai.getAndIncrement());
115	<	assertEquals(0,ai.getAndIncrement());
116	<	assertEquals(1,ai.get());
137	>	assertEquals(1,ai.getAndDecrement());
138	>	assertEquals(0,ai.getAndDecrement());
139	>	assertEquals(-1,ai.getAndDecrement());
140		}
141
142		/**
143	<	*
143	>	* getAndIncrement returns previous value and increments
144		*/
145	<	public void testAddAndGet(){
145	>	public void testGetAndIncrement() {
146		AtomicInteger ai = new AtomicInteger(1);
147	<	assertEquals(3,ai.addAndGet(2));
148	<	assertEquals(3,ai.get());
149	<	assertEquals(-1,ai.addAndGet(-4));
150	<	assertEquals(-1,ai.get());
147	>	assertEquals(1,ai.getAndIncrement());
148	>	assertEquals(2,ai.get());
149	>	ai.set(-2);
150	>	assertEquals(-2,ai.getAndIncrement());
151	>	assertEquals(-1,ai.getAndIncrement());
152	>	assertEquals(0,ai.getAndIncrement());
153	>	assertEquals(1,ai.get());
154		}
155
156		/**
157	<	*
157	>	* addAndGet adds given value to current, and returns current value
158		*/
159	<	public void testDecrementAndGet(){
159	>	public void testAddAndGet() {
160		AtomicInteger ai = new AtomicInteger(1);
161	<	assertEquals(0,ai.decrementAndGet());
162	<	assertEquals(-1,ai.decrementAndGet());
163	<	assertEquals(-2,ai.decrementAndGet());
164	<	assertEquals(-2,ai.get());
161	>	assertEquals(3,ai.addAndGet(2));
162	>	assertEquals(3,ai.get());
163	>	assertEquals(-1,ai.addAndGet(-4));
164	>	assertEquals(-1,ai.get());
165		}
166
167		/**
168	<	*
168	>	* decrementAndGet decrements and returns current value
169		*/
170	<	public void testIncrementAndGet(){
170	>	public void testDecrementAndGet() {
171		AtomicInteger ai = new AtomicInteger(1);
172	<	assertEquals(2,ai.incrementAndGet());
173	<	assertEquals(2,ai.get());
174	<	ai.set(-2);
175	<	assertEquals(-1,ai.incrementAndGet());
150	<	assertEquals(0,ai.incrementAndGet());
151	<	assertEquals(1,ai.incrementAndGet());
152	<	assertEquals(1,ai.get());
172	>	assertEquals(0,ai.decrementAndGet());
173	>	assertEquals(-1,ai.decrementAndGet());
174	>	assertEquals(-2,ai.decrementAndGet());
175	>	assertEquals(-2,ai.get());
176		}
177
178		/**
179	<	*
179	>	* incrementAndGet increments and returns current value
180		*/
181	<	public void testSerialization() {
181	>	public void testIncrementAndGet() {
182	>	AtomicInteger ai = new AtomicInteger(1);
183	>	assertEquals(2,ai.incrementAndGet());
184	>	assertEquals(2,ai.get());
185	>	ai.set(-2);
186	>	assertEquals(-1,ai.incrementAndGet());
187	>	assertEquals(0,ai.incrementAndGet());
188	>	assertEquals(1,ai.incrementAndGet());
189	>	assertEquals(1,ai.get());
190	>	}
191	>
192	>	/**
193	>	* a deserialized serialized atomic holds same value
194	>	*/
195	>	public void testSerialization() throws Exception {
196		AtomicInteger l = new AtomicInteger();
197
198	<	try {
199	<	l.set(22);
200	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
201	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
202	<	out.writeObject(l);
203	<	out.close();
204	<
205	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
206	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
207	<	AtomicInteger r = (AtomicInteger) in.readObject();
208	<	assertEquals(l.get(), r.get());
209	<	} catch(Exception e){
210	<	unexpectedException();
198	>	l.set(22);
199	>	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
200	>	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
201	>	out.writeObject(l);
202	>	out.close();
203	>
204	>	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
205	>	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
206	>	AtomicInteger r = (AtomicInteger) in.readObject();
207	>	assertEquals(l.get(), r.get());
208	>	}
209	>
210	>	/**
211	>	* toString returns current value.
212	>	*/
213	>	public void testToString() {
214	>	AtomicInteger ai = new AtomicInteger();
215	>	assertEquals("0", ai.toString());
216	>	for (int x : VALUES) {
217	>	ai.set(x);
218	>	assertEquals(ai.toString(), Integer.toString(x));
219		}
220		}
221
222	+	/**
223	+	* intValue returns current value.
224	+	*/
225	+	public void testIntValue() {
226	+	AtomicInteger ai = new AtomicInteger();
227	+	assertEquals(0, ai.intValue());
228	+	for (int x : VALUES) {
229	+	ai.set(x);
230	+	assertEquals(x, ai.intValue());
231	+	}
232	+	}
233	+
234	+	/**
235	+	* longValue returns current value.
236	+	*/
237	+	public void testLongValue() {
238	+	AtomicInteger ai = new AtomicInteger();
239	+	assertEquals(0L, ai.longValue());
240	+	for (int x : VALUES) {
241	+	ai.set(x);
242	+	assertEquals((long)x, ai.longValue());
243	+	}
244	+	}
245	+
246	+	/**
247	+	* floatValue returns current value.
248	+	*/
249	+	public void testFloatValue() {
250	+	AtomicInteger ai = new AtomicInteger();
251	+	assertEquals(0.0f, ai.floatValue());
252	+	for (int x : VALUES) {
253	+	ai.set(x);
254	+	assertEquals((float)x, ai.floatValue());
255	+	}
256	+	}
257	+
258	+	/**
259	+	* doubleValue returns current value.
260	+	*/
261	+	public void testDoubleValue() {
262	+	AtomicInteger ai = new AtomicInteger();
263	+	assertEquals(0.0d, ai.doubleValue());
264	+	for (int x : VALUES) {
265	+	ai.set(x);
266	+	assertEquals((double)x, ai.doubleValue());
267	+	}
268	+	}
269
270		}

Diff Legend

–	Removed lines
+	Added lines
<	Changed lines
>	Changed lines