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

Comparing jsr166/src/test/tck/AtomicIntegerTest.java (file contents):
Revision 1.3 by dl, Sun Sep 14 20:42:40 2003 UTC vs.
Revision 1.12 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.*;
#	Line 17 | Line 18 | public class AtomicIntegerTest extends J
18		return new TestSuite(AtomicIntegerTest.class);
19		}
20
21	+	/**
22	+	* constructor initializes to given value
23	+	*/
24		public void testConstructor(){
25		AtomicInteger ai = new AtomicInteger(1);
26		assertEquals(1,ai.get());
27		}
28
29	+	/**
30	+	* default constructed initializes to zero
31	+	*/
32		public void testConstructor2(){
33		AtomicInteger ai = new AtomicInteger();
34		assertEquals(0,ai.get());
35		}
36
37	+	/**
38	+	* get returns the last value set
39	+	*/
40		public void testGetSet(){
41		AtomicInteger ai = new AtomicInteger(1);
42		assertEquals(1,ai.get());
#	Line 34 | Line 44 | public class AtomicIntegerTest extends J
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	+	* compareAndSet succeeds in changing value if equal to expected else fails
64	+	*/
65		public void testCompareAndSet(){
66		AtomicInteger ai = new AtomicInteger(1);
67		assertTrue(ai.compareAndSet(1,2));
#	Line 47 | Line 73 | public class AtomicIntegerTest extends J
73		assertEquals(7,ai.get());
74		}
75
76	+	/**
77	+	* compareAndSet in one thread enables another waiting for value
78	+	* to succeed
79	+	*/
80	+	public void testCompareAndSetInMultipleThreads() {
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	+	try {
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	+	catch(Exception e) {
94	+	unexpectedException();
95	+	}
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		while(!ai.weakCompareAndSet(1,2));
#	Line 56 | Line 108 | public class AtomicIntegerTest extends J
108		assertEquals(7,ai.get());
109		}
110
111	+	/**
112	+	* getAndSet returns previous value and sets to given value
113	+	*/
114		public void testGetAndSet(){
115		AtomicInteger ai = new AtomicInteger(1);
116		assertEquals(1,ai.getAndSet(0));
#	Line 63 | Line 118 | public class AtomicIntegerTest extends J
118		assertEquals(-10,ai.getAndSet(1));
119		}
120
121	+	/**
122	+	* getAndAdd returns previous value and adds given value
123	+	*/
124		public void testGetAndAdd(){
125		AtomicInteger ai = new AtomicInteger(1);
126		assertEquals(1,ai.getAndAdd(2));
#	Line 71 | Line 129 | public class AtomicIntegerTest extends J
129		assertEquals(-1,ai.get());
130		}
131
132	+	/**
133	+	* getAndDecrement returns previous value and decrements
134	+	*/
135		public void testGetAndDecrement(){
136		AtomicInteger ai = new AtomicInteger(1);
137		assertEquals(1,ai.getAndDecrement());
#	Line 78 | Line 139 | public class AtomicIntegerTest extends J
139		assertEquals(-1,ai.getAndDecrement());
140		}
141
142	+	/**
143	+	* getAndIncrement returns previous value and increments
144	+	*/
145		public void testGetAndIncrement(){
146		AtomicInteger ai = new AtomicInteger(1);
147		assertEquals(1,ai.getAndIncrement());
#	Line 89 | Line 153 | public class AtomicIntegerTest extends J
153		assertEquals(1,ai.get());
154		}
155
156	+	/**
157	+	* addAndGet adds given value to current, and returns current value
158	+	*/
159		public void testAddAndGet(){
160		AtomicInteger ai = new AtomicInteger(1);
161		assertEquals(3,ai.addAndGet(2));
#	Line 97 | Line 164 | public class AtomicIntegerTest extends J
164		assertEquals(-1,ai.get());
165		}
166
167	+	/**
168	+	* decrementAndGet decrements and returns current value
169	+	*/
170		public void testDecrementAndGet(){
171		AtomicInteger ai = new AtomicInteger(1);
172		assertEquals(0,ai.decrementAndGet());
#	Line 105 | Line 175 | public class AtomicIntegerTest extends J
175		assertEquals(-2,ai.get());
176		}
177
178	+	/**
179	+	* incrementAndGet increments and returns current value
180	+	*/
181		public void testIncrementAndGet(){
182		AtomicInteger ai = new AtomicInteger(1);
183		assertEquals(2,ai.incrementAndGet());
#	Line 116 | Line 189 | public class AtomicIntegerTest extends J
189		assertEquals(1,ai.get());
190		}
191
192	+	/**
193	+	* a deserialized serialized atomic holds same value
194	+	*/
195		public void testSerialization() {
196		AtomicInteger l = new AtomicInteger();
197
#	Line 131 | Line 207 | public class AtomicIntegerTest extends J
207		AtomicInteger r = (AtomicInteger) in.readObject();
208		assertEquals(l.get(), r.get());
209		} catch(Exception e){
210	<	e.printStackTrace();
135	<	fail("unexpected exception");
210	>	unexpectedException();
211		}
212		}
213
214	+	/**
215	+	* toString returns current value.
216	+	*/
217	+	public void testToString() {
218	+	AtomicInteger ai = new AtomicInteger();
219	+	for (int i = -12; i < 6; ++i) {
220	+	ai.set(i);
221	+	assertEquals(ai.toString(), Integer.toString(i));
222	+	}
223	+	}
224	+
225	+	/**
226	+	* intValue returns current value.
227	+	*/
228	+	public void testIntValue() {
229	+	AtomicInteger ai = new AtomicInteger();
230	+	for (int i = -12; i < 6; ++i) {
231	+	ai.set(i);
232	+	assertEquals(i, ai.intValue());
233	+	}
234	+	}
235	+
236	+
237	+	/**
238	+	* longValue returns current value.
239	+	*/
240	+	public void testLongValue() {
241	+	AtomicInteger ai = new AtomicInteger();
242	+	for (int i = -12; i < 6; ++i) {
243	+	ai.set(i);
244	+	assertEquals((long)i, ai.longValue());
245	+	}
246	+	}
247	+
248	+	/**
249	+	* floatValue returns current value.
250	+	*/
251	+	public void testFloatValue() {
252	+	AtomicInteger ai = new AtomicInteger();
253	+	for (int i = -12; i < 6; ++i) {
254	+	ai.set(i);
255	+	assertEquals((float)i, ai.floatValue());
256	+	}
257	+	}
258	+
259	+	/**
260	+	* doubleValue returns current value.
261	+	*/
262	+	public void testDoubleValue() {
263	+	AtomicInteger ai = new AtomicInteger();
264	+	for (int i = -12; i < 6; ++i) {
265	+	ai.set(i);
266	+	assertEquals((double)i, ai.doubleValue());
267	+	}
268	+	}
269	+
270	+
271
272		}

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