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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 1.15 by jsr166, Tue Nov 17 03:12:51 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 18 | Line 19 | public class AtomicIntegerTest extends J
19		}
20
21		/**
22	<	*
22	>	* constructor initializes to given value
23		*/
24	<	public void testConstructor(){
24	>	public void testConstructor() {
25		AtomicInteger ai = new AtomicInteger(1);
26		assertEquals(1,ai.get());
27		}
28
29		/**
30	<	*
30	>	* default constructed initializes to zero
31		*/
32	<	public void testConstructor2(){
32	>	public void testConstructor2() {
33		AtomicInteger ai = new AtomicInteger();
34		assertEquals(0,ai.get());
35		}
36
37		/**
38	<	*
38	>	* get returns the last value set
39		*/
40	<	public void testGetSet(){
40	>	public void testGetSet() {
41		AtomicInteger ai = new AtomicInteger(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	<
47	>
48	>	}
49	>
50	>	/**
51	>	* get returns the last value lazySet in same thread
52	>	*/
53	>	public void testGetLazySet() {
54	>	AtomicInteger ai = new AtomicInteger(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	<	*
63	>	* compareAndSet succeeds in changing value if equal to expected else fails
64		*/
65	<	public void testCompareAndSet(){
65	>	public void testCompareAndSet() {
66		AtomicInteger ai = new AtomicInteger(1);
67		assertTrue(ai.compareAndSet(1,2));
68		assertTrue(ai.compareAndSet(2,-4));
#	Line 60 | Line 74 | public class AtomicIntegerTest extends J
74		}
75
76		/**
77	<	*
77	>	* compareAndSet in one thread enables another waiting for value
78	>	* to succeed
79	>	*/
80	>	public void testCompareAndSetInMultipleThreads() throws Exception {
81	>	final AtomicInteger ai = new AtomicInteger(1);
82	>	Thread t = new Thread(new Runnable() {
83	>	public void run() {
84	>	while (!ai.compareAndSet(2, 3)) Thread.yield();
85	>	}});
86	>
87	>	t.start();
88	>	assertTrue(ai.compareAndSet(1, 2));
89	>	t.join(LONG_DELAY_MS);
90	>	assertFalse(t.isAlive());
91	>	assertEquals(ai.get(), 3);
92	>	}
93	>
94	>	/**
95	>	* repeated weakCompareAndSet succeeds in changing value when equal
96	>	* to expected
97		*/
98	<	public void testWeakCompareAndSet(){
98	>	public void testWeakCompareAndSet() {
99		AtomicInteger ai = new AtomicInteger(1);
100	<	while(!ai.weakCompareAndSet(1,2));
101	<	while(!ai.weakCompareAndSet(2,-4));
100	>	while (!ai.weakCompareAndSet(1,2));
101	>	while (!ai.weakCompareAndSet(2,-4));
102		assertEquals(-4,ai.get());
103	<	while(!ai.weakCompareAndSet(-4,7));
103	>	while (!ai.weakCompareAndSet(-4,7));
104		assertEquals(7,ai.get());
105		}
106
107		/**
108	<	*
108	>	* getAndSet returns previous value and sets to given value
109		*/
110	<	public void testGetAndSet(){
110	>	public void testGetAndSet() {
111		AtomicInteger ai = new AtomicInteger(1);
112		assertEquals(1,ai.getAndSet(0));
113		assertEquals(0,ai.getAndSet(-10));
#	Line 82 | Line 115 | public class AtomicIntegerTest extends J
115		}
116
117		/**
118	<	*
118	>	* getAndAdd returns previous value and adds given value
119		*/
120	<	public void testGetAndAdd(){
120	>	public void testGetAndAdd() {
121		AtomicInteger ai = new AtomicInteger(1);
122		assertEquals(1,ai.getAndAdd(2));
123		assertEquals(3,ai.get());
#	Line 93 | Line 126 | public class AtomicIntegerTest extends J
126		}
127
128		/**
129	<	*
129	>	* getAndDecrement returns previous value and decrements
130		*/
131	<	public void testGetAndDecrement(){
131	>	public void testGetAndDecrement() {
132		AtomicInteger ai = new AtomicInteger(1);
133		assertEquals(1,ai.getAndDecrement());
134		assertEquals(0,ai.getAndDecrement());
#	Line 103 | Line 136 | public class AtomicIntegerTest extends J
136		}
137
138		/**
139	<	*
139	>	* getAndIncrement returns previous value and increments
140		*/
141	<	public void testGetAndIncrement(){
141	>	public void testGetAndIncrement() {
142		AtomicInteger ai = new AtomicInteger(1);
143		assertEquals(1,ai.getAndIncrement());
144		assertEquals(2,ai.get());
#	Line 117 | Line 150 | public class AtomicIntegerTest extends J
150		}
151
152		/**
153	<	*
153	>	* addAndGet adds given value to current, and returns current value
154		*/
155	<	public void testAddAndGet(){
155	>	public void testAddAndGet() {
156		AtomicInteger ai = new AtomicInteger(1);
157		assertEquals(3,ai.addAndGet(2));
158		assertEquals(3,ai.get());
#	Line 128 | Line 161 | public class AtomicIntegerTest extends J
161		}
162
163		/**
164	<	*
164	>	* decrementAndGet decrements and returns current value
165		*/
166	<	public void testDecrementAndGet(){
166	>	public void testDecrementAndGet() {
167		AtomicInteger ai = new AtomicInteger(1);
168		assertEquals(0,ai.decrementAndGet());
169		assertEquals(-1,ai.decrementAndGet());
#	Line 139 | Line 172 | public class AtomicIntegerTest extends J
172		}
173
174		/**
175	<	*
175	>	* incrementAndGet increments and returns current value
176		*/
177	<	public void testIncrementAndGet(){
177	>	public void testIncrementAndGet() {
178		AtomicInteger ai = new AtomicInteger(1);
179		assertEquals(2,ai.incrementAndGet());
180		assertEquals(2,ai.get());
#	Line 153 | Line 186 | public class AtomicIntegerTest extends J
186		}
187
188		/**
189	<	*
189	>	* a deserialized serialized atomic holds same value
190		*/
191	<	public void testSerialization() {
191	>	public void testSerialization() throws Exception {
192		AtomicInteger l = new AtomicInteger();
193
194	<	try {
195	<	l.set(22);
196	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
197	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
198	<	out.writeObject(l);
199	<	out.close();
200	<
201	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
202	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
203	<	AtomicInteger r = (AtomicInteger) in.readObject();
204	<	assertEquals(l.get(), r.get());
205	<	} catch(Exception e){
206	<	unexpectedException();
194	>	l.set(22);
195	>	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
196	>	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
197	>	out.writeObject(l);
198	>	out.close();
199	>
200	>	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
201	>	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
202	>	AtomicInteger r = (AtomicInteger) in.readObject();
203	>	assertEquals(l.get(), r.get());
204	>	}
205	>
206	>	/**
207	>	* toString returns current value.
208	>	*/
209	>	public void testToString() {
210	>	AtomicInteger ai = new AtomicInteger();
211	>	for (int i = -12; i < 6; ++i) {
212	>	ai.set(i);
213	>	assertEquals(ai.toString(), Integer.toString(i));
214		}
215		}
216
217	+	/**
218	+	* intValue returns current value.
219	+	*/
220	+	public void testIntValue() {
221	+	AtomicInteger ai = new AtomicInteger();
222	+	for (int i = -12; i < 6; ++i) {
223	+	ai.set(i);
224	+	assertEquals(i, ai.intValue());
225	+	}
226	+	}
227	+
228	+
229	+	/**
230	+	* longValue returns current value.
231	+	*/
232	+	public void testLongValue() {
233	+	AtomicInteger ai = new AtomicInteger();
234	+	for (int i = -12; i < 6; ++i) {
235	+	ai.set(i);
236	+	assertEquals((long)i, ai.longValue());
237	+	}
238	+	}
239	+
240	+	/**
241	+	* floatValue returns current value.
242	+	*/
243	+	public void testFloatValue() {
244	+	AtomicInteger ai = new AtomicInteger();
245	+	for (int i = -12; i < 6; ++i) {
246	+	ai.set(i);
247	+	assertEquals((float)i, ai.floatValue());
248	+	}
249	+	}
250	+
251	+	/**
252	+	* doubleValue returns current value.
253	+	*/
254	+	public void testDoubleValue() {
255	+	AtomicInteger ai = new AtomicInteger();
256	+	for (int i = -12; i < 6; ++i) {
257	+	ai.set(i);
258	+	assertEquals((double)i, ai.doubleValue());
259	+	}
260	+	}
261	+
262	+
263
264		}

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