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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 1.18 by jsr166, Sun Nov 22 18:55:56 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.*;
#	Line 17 | Line 18 | public class AtomicIntegerTest extends J
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());
51	<
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		/**
55	<	*
55	>	* get returns the last value lazySet in same thread
56		*/
57	<	public void testCompareAndSet(){
57	>	public void testGetLazySet() {
58		AtomicInteger ai = new AtomicInteger(1);
59	<	assertTrue(ai.compareAndSet(1,2));
60	<	assertTrue(ai.compareAndSet(2,-4));
61	<	assertEquals(-4,ai.get());
62	<	assertFalse(ai.compareAndSet(-5,7));
63	<	assertFalse((7 == ai.get()));
64	<	assertTrue(ai.compareAndSet(-4,7));
65	<	assertEquals(7,ai.get());
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	>	AtomicInteger ai = new AtomicInteger(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());
78		}
79
80		/**
81	<	*
81	>	* compareAndSet in one thread enables another waiting for value
82	>	* to succeed
83		*/
84	<	public void testWeakCompareAndSet(){
84	>	public void testCompareAndSetInMultipleThreads() throws Exception {
85	>	final AtomicInteger ai = new AtomicInteger(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(ai.get(), 3);
97	>	}
98	>
99	>	/**
100	>	* repeated weakCompareAndSet succeeds in changing value when equal
101	>	* to expected
102	>	*/
103	>	public void testWeakCompareAndSet() {
104		AtomicInteger ai = new AtomicInteger(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		AtomicInteger ai = new AtomicInteger(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		AtomicInteger ai = new AtomicInteger(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		AtomicInteger ai = new AtomicInteger(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		AtomicInteger ai = new AtomicInteger(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		AtomicInteger ai = new AtomicInteger(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		AtomicInteger ai = new AtomicInteger(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		AtomicInteger ai = new AtomicInteger(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() {
196	>	public void testSerialization() throws Exception {
197		AtomicInteger l = new AtomicInteger();
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	<	AtomicInteger r = (AtomicInteger) in.readObject();
209	<	assertEquals(l.get(), r.get());
210	<	} catch(Exception e){
211	<	unexpectedException();
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	>	}
210	>
211	>	/**
212	>	* toString returns current value.
213	>	*/
214	>	public void testToString() {
215	>	AtomicInteger ai = new AtomicInteger();
216	>	assertEquals("0", ai.toString());
217	>	for (int x : VALUES) {
218	>	ai.set(x);
219	>	assertEquals(ai.toString(), Integer.toString(x));
220	>	}
221	>	}
222	>
223	>	/**
224	>	* intValue returns current value.
225	>	*/
226	>	public void testIntValue() {
227	>	AtomicInteger ai = new AtomicInteger();
228	>	assertEquals(0, ai.intValue());
229	>	for (int x : VALUES) {
230	>	ai.set(x);
231	>	assertEquals(x, ai.intValue());
232		}
233		}
234
235	+	/**
236	+	* longValue returns current value.
237	+	*/
238	+	public void testLongValue() {
239	+	AtomicInteger ai = new AtomicInteger();
240	+	assertEquals(0L, ai.longValue());
241	+	for (int x : VALUES) {
242	+	ai.set(x);
243	+	assertEquals((long)x, ai.longValue());
244	+	}
245	+	}
246	+
247	+	/**
248	+	* floatValue returns current value.
249	+	*/
250	+	public void testFloatValue() {
251	+	AtomicInteger ai = new AtomicInteger();
252	+	assertEquals(0.0f, ai.floatValue());
253	+	for (int x : VALUES) {
254	+	ai.set(x);
255	+	assertEquals((float)x, ai.floatValue());
256	+	}
257	+	}
258	+
259	+	/**
260	+	* doubleValue returns current value.
261	+	*/
262	+	public void testDoubleValue() {
263	+	AtomicInteger ai = new AtomicInteger();
264	+	assertEquals(0.0d, ai.doubleValue());
265	+	for (int x : VALUES) {
266	+	ai.set(x);
267	+	assertEquals((double)x, ai.doubleValue());
268	+	}
269	+	}
270
271		}

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