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

Comparing jsr166/src/test/tck/AtomicLongTest.java (file contents):
Revision 1.1 by dl, Sun Aug 31 19:24:53 2003 UTC vs.
Revision 1.11 by jsr166, Mon Nov 2 20:28:31 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.*;
10		import java.util.concurrent.atomic.*;
11	+	import java.io.*;
12
13	<	public class AtomicLongTest extends TestCase {
13	>	public class AtomicLongTest extends JSR166TestCase {
14		public static void main (String[] args) {
15		junit.textui.TestRunner.run (suite());
16		}
#	Line 16 | Line 18 | public class AtomicLongTest extends Test
18		return new TestSuite(AtomicLongTest.class);
19		}
20
21	+	/**
22	+	* constructor initializes to given value
23	+	*/
24		public void testConstructor(){
25		AtomicLong ai = new AtomicLong(1);
26		assertEquals(1,ai.get());
27		}
28
29	+	/**
30	+	* default constructed initializes to zero
31	+	*/
32		public void testConstructor2(){
33		AtomicLong ai = new AtomicLong();
34		assertEquals(0,ai.get());
35		}
36
37	+	/**
38	+	* get returns the last value set
39	+	*/
40		public void testGetSet(){
41		AtomicLong ai = new AtomicLong(1);
42		assertEquals(1,ai.get());
#	Line 33 | Line 44 | public class AtomicLongTest extends Test
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	+	AtomicLong ai = new AtomicLong(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	+	/**
64	+	* compareAndSet succeeds in changing value if equal to expected else fails
65	+	*/
66		public void testCompareAndSet(){
67		AtomicLong ai = new AtomicLong(1);
68		assertTrue(ai.compareAndSet(1,2));
#	Line 46 | Line 74 | public class AtomicLongTest extends Test
74		assertEquals(7,ai.get());
75		}
76
77	+	/**
78	+	* compareAndSet in one thread enables another waiting for value
79	+	* to succeed
80	+	*/
81	+	public void testCompareAndSetInMultipleThreads() {
82	+	final AtomicLong ai = new AtomicLong(1);
83	+	Thread t = new Thread(new Runnable() {
84	+	public void run() {
85	+	while(!ai.compareAndSet(2, 3)) Thread.yield();
86	+	}});
87	+	try {
88	+	t.start();
89	+	assertTrue(ai.compareAndSet(1, 2));
90	+	t.join(LONG_DELAY_MS);
91	+	assertFalse(t.isAlive());
92	+	assertEquals(ai.get(), 3);
93	+	}
94	+	catch(Exception e) {
95	+	unexpectedException();
96	+	}
97	+	}
98	+
99	+	/**
100	+	* repeated weakCompareAndSet succeeds in changing value when equal
101	+	* to expected
102	+	*/
103		public void testWeakCompareAndSet(){
104		AtomicLong ai = new AtomicLong(1);
105		while(!ai.weakCompareAndSet(1,2));
#	Line 55 | Line 109 | public class AtomicLongTest extends Test
109		assertEquals(7,ai.get());
110		}
111
112	+	/**
113	+	* getAndSet returns previous value and sets to given value
114	+	*/
115		public void testGetAndSet(){
116		AtomicLong ai = new AtomicLong(1);
117		assertEquals(1,ai.getAndSet(0));
#	Line 62 | Line 119 | public class AtomicLongTest extends Test
119		assertEquals(-10,ai.getAndSet(1));
120		}
121
122	+	/**
123	+	* getAndAdd returns previous value and adds given value
124	+	*/
125		public void testGetAndAdd(){
126		AtomicLong ai = new AtomicLong(1);
127		assertEquals(1,ai.getAndAdd(2));
#	Line 70 | Line 130 | public class AtomicLongTest extends Test
130		assertEquals(-1,ai.get());
131		}
132
133	+	/**
134	+	* getAndDecrement returns previous value and decrements
135	+	*/
136		public void testGetAndDecrement(){
137		AtomicLong ai = new AtomicLong(1);
138		assertEquals(1,ai.getAndDecrement());
#	Line 77 | Line 140 | public class AtomicLongTest extends Test
140		assertEquals(-1,ai.getAndDecrement());
141		}
142
143	+	/**
144	+	* getAndIncrement returns previous value and increments
145	+	*/
146		public void testGetAndIncrement(){
147		AtomicLong ai = new AtomicLong(1);
148		assertEquals(1,ai.getAndIncrement());
#	Line 88 | Line 154 | public class AtomicLongTest extends Test
154		assertEquals(1,ai.get());
155		}
156
157	+	/**
158	+	* addAndGet adds given value to current, and returns current value
159	+	*/
160		public void testAddAndGet(){
161		AtomicLong ai = new AtomicLong(1);
162		assertEquals(3,ai.addAndGet(2));
#	Line 96 | Line 165 | public class AtomicLongTest extends Test
165		assertEquals(-1,ai.get());
166		}
167
168	+	/**
169	+	* decrementAndGet decrements and returns current value
170	+	*/
171		public void testDecrementAndGet(){
172		AtomicLong ai = new AtomicLong(1);
173		assertEquals(0,ai.decrementAndGet());
#	Line 104 | Line 176 | public class AtomicLongTest extends Test
176		assertEquals(-2,ai.get());
177		}
178
179	+	/**
180	+	* incrementAndGet increments and returns current value
181	+	*/
182		public void testIncrementAndGet(){
183		AtomicLong ai = new AtomicLong(1);
184		assertEquals(2,ai.incrementAndGet());
#	Line 115 | Line 190 | public class AtomicLongTest extends Test
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	+	}
213	+	}
214	+
215	+	/**
216	+	* toString returns current value.
217	+	*/
218	+	public void testToString() {
219	+	AtomicLong ai = new AtomicLong();
220	+	for (long i = -12; i < 6; ++i) {
221	+	ai.set(i);
222	+	assertEquals(ai.toString(), Long.toString(i));
223	+	}
224	+	}
225	+
226	+	/**
227	+	* longValue returns current value.
228	+	*/
229	+	public void testLongValue() {
230	+	AtomicLong ai = new AtomicLong();
231	+	for (int i = -12; i < 6; ++i) {
232	+	ai.set(i);
233	+	assertEquals((long)i, ai.longValue());
234	+	}
235	+	}
236	+
237	+	/**
238	+	* floatValue returns current value.
239	+	*/
240	+	public void testFloatValue() {
241	+	AtomicLong ai = new AtomicLong();
242	+	for (int i = -12; i < 6; ++i) {
243	+	ai.set(i);
244	+	assertEquals((float)i, ai.floatValue());
245	+	}
246	+	}
247	+
248	+	/**
249	+	* doubleValue returns current value.
250	+	*/
251	+	public void testDoubleValue() {
252	+	AtomicLong ai = new AtomicLong();
253	+	for (int i = -12; i < 6; ++i) {
254	+	ai.set(i);
255	+	assertEquals((double)i, ai.doubleValue());
256	+	}
257	+	}
258	+
259
260		}

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