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

Comparing jsr166/src/test/tck/AtomicLongTest.java (file contents):
Revision 1.8 by dl, Fri Jan 9 20:07:36 2004 UTC vs.
Revision 1.18 by jsr166, Tue Dec 1 09:56:28 2009 UTC

#	Line 2 | Line 2
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.
5	>	* Other contributors include Andrew Wright, Jeffrey Hayes,
6	>	* Pat Fisher, Mike Judd.
7		*/
8
9		import junit.framework.*;
#	Line 18 | Line 18 | public class AtomicLongTest extends JSR1
18		return new TestSuite(AtomicLongTest.class);
19		}
20
21	+	final long[] VALUES = {
22	+	Long.MIN_VALUE,
23	+	Integer.MIN_VALUE, -1, 0, 1, 42, Integer.MAX_VALUE,
24	+	Long.MAX_VALUE,
25	+	};
26	+
27		/**
28		* constructor initializes to given value
29		*/
30	<	public void testConstructor(){
30	>	public void testConstructor() {
31		AtomicLong ai = new AtomicLong(1);
32	<	assertEquals(1,ai.get());
32	>	assertEquals(1,ai.get());
33		}
34
35		/**
36		* default constructed initializes to zero
37		*/
38	<	public void testConstructor2(){
38	>	public void testConstructor2() {
39		AtomicLong ai = new AtomicLong();
40	<	assertEquals(0,ai.get());
40	>	assertEquals(0,ai.get());
41		}
42
43		/**
44		* get returns the last value set
45		*/
46	<	public void testGetSet(){
46	>	public void testGetSet() {
47		AtomicLong ai = new AtomicLong(1);
48	<	assertEquals(1,ai.get());
49	<	ai.set(2);
50	<	assertEquals(2,ai.get());
51	<	ai.set(-3);
52	<	assertEquals(-3,ai.get());
47	<
48	>	assertEquals(1,ai.get());
49	>	ai.set(2);
50	>	assertEquals(2,ai.get());
51	>	ai.set(-3);
52	>	assertEquals(-3,ai.get());
53		}
54	+
55	+	/**
56	+	* get returns the last value lazySet in same thread
57	+	*/
58	+	public void testGetLazySet() {
59	+	AtomicLong ai = new AtomicLong(1);
60	+	assertEquals(1,ai.get());
61	+	ai.lazySet(2);
62	+	assertEquals(2,ai.get());
63	+	ai.lazySet(-3);
64	+	assertEquals(-3,ai.get());
65	+	}
66	+
67		/**
68		* compareAndSet succeeds in changing value if equal to expected else fails
69		*/
70	<	public void testCompareAndSet(){
70	>	public void testCompareAndSet() {
71		AtomicLong ai = new AtomicLong(1);
72	<	assertTrue(ai.compareAndSet(1,2));
73	<	assertTrue(ai.compareAndSet(2,-4));
74	<	assertEquals(-4,ai.get());
75	<	assertFalse(ai.compareAndSet(-5,7));
76	<	assertFalse((7 == ai.get()));
77	<	assertTrue(ai.compareAndSet(-4,7));
78	<	assertEquals(7,ai.get());
72	>	assertTrue(ai.compareAndSet(1,2));
73	>	assertTrue(ai.compareAndSet(2,-4));
74	>	assertEquals(-4,ai.get());
75	>	assertFalse(ai.compareAndSet(-5,7));
76	>	assertEquals(-4,ai.get());
77	>	assertTrue(ai.compareAndSet(-4,7));
78	>	assertEquals(7,ai.get());
79		}
80
81		/**
82		* compareAndSet in one thread enables another waiting for value
83		* to succeed
84		*/
85	<	public void testCompareAndSetInMultipleThreads() {
85	>	public void testCompareAndSetInMultipleThreads() throws Exception {
86		final AtomicLong ai = new AtomicLong(1);
87	<	Thread t = new Thread(new Runnable() {
88	<	public void run() {
89	<	while(!ai.compareAndSet(2, 3)) Thread.yield();
90	<	}});
91	<	try {
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	<	}
80	<	catch(Exception e) {
81	<	unexpectedException();
82	<	}
87	>	Thread t = new Thread(new CheckedRunnable() {
88	>	public void realRun() {
89	>	while (!ai.compareAndSet(2, 3))
90	>	Thread.yield();
91	>	}});
92	>
93	>	t.start();
94	>	assertTrue(ai.compareAndSet(1, 2));
95	>	t.join(LONG_DELAY_MS);
96	>	assertFalse(t.isAlive());
97	>	assertEquals(ai.get(), 3);
98		}
99
100		/**
101		* repeated weakCompareAndSet succeeds in changing value when equal
102	<	* to expected
102	>	* to expected
103		*/
104	<	public void testWeakCompareAndSet(){
104	>	public void testWeakCompareAndSet() {
105		AtomicLong ai = new AtomicLong(1);
106	<	while(!ai.weakCompareAndSet(1,2));
107	<	while(!ai.weakCompareAndSet(2,-4));
108	<	assertEquals(-4,ai.get());
109	<	while(!ai.weakCompareAndSet(-4,7));
110	<	assertEquals(7,ai.get());
106	>	while (!ai.weakCompareAndSet(1,2));
107	>	while (!ai.weakCompareAndSet(2,-4));
108	>	assertEquals(-4,ai.get());
109	>	while (!ai.weakCompareAndSet(-4,7));
110	>	assertEquals(7,ai.get());
111		}
112
113		/**
114		* getAndSet returns previous value and sets to given value
115		*/
116	<	public void testGetAndSet(){
116	>	public void testGetAndSet() {
117		AtomicLong ai = new AtomicLong(1);
118	<	assertEquals(1,ai.getAndSet(0));
119	<	assertEquals(0,ai.getAndSet(-10));
120	<	assertEquals(-10,ai.getAndSet(1));
118	>	assertEquals(1,ai.getAndSet(0));
119	>	assertEquals(0,ai.getAndSet(-10));
120	>	assertEquals(-10,ai.getAndSet(1));
121		}
122
123		/**
124		* getAndAdd returns previous value and adds given value
125		*/
126	<	public void testGetAndAdd(){
126	>	public void testGetAndAdd() {
127		AtomicLong ai = new AtomicLong(1);
128	<	assertEquals(1,ai.getAndAdd(2));
129	<	assertEquals(3,ai.get());
130	<	assertEquals(3,ai.getAndAdd(-4));
131	<	assertEquals(-1,ai.get());
128	>	assertEquals(1,ai.getAndAdd(2));
129	>	assertEquals(3,ai.get());
130	>	assertEquals(3,ai.getAndAdd(-4));
131	>	assertEquals(-1,ai.get());
132		}
133
134		/**
135		* getAndDecrement returns previous value and decrements
136		*/
137	<	public void testGetAndDecrement(){
137	>	public void testGetAndDecrement() {
138		AtomicLong ai = new AtomicLong(1);
139	<	assertEquals(1,ai.getAndDecrement());
140	<	assertEquals(0,ai.getAndDecrement());
141	<	assertEquals(-1,ai.getAndDecrement());
139	>	assertEquals(1,ai.getAndDecrement());
140	>	assertEquals(0,ai.getAndDecrement());
141	>	assertEquals(-1,ai.getAndDecrement());
142		}
143
144		/**
145		* getAndIncrement returns previous value and increments
146		*/
147	<	public void testGetAndIncrement(){
147	>	public void testGetAndIncrement() {
148		AtomicLong ai = new AtomicLong(1);
149	<	assertEquals(1,ai.getAndIncrement());
150	<	assertEquals(2,ai.get());
151	<	ai.set(-2);
152	<	assertEquals(-2,ai.getAndIncrement());
153	<	assertEquals(-1,ai.getAndIncrement());
154	<	assertEquals(0,ai.getAndIncrement());
155	<	assertEquals(1,ai.get());
149	>	assertEquals(1,ai.getAndIncrement());
150	>	assertEquals(2,ai.get());
151	>	ai.set(-2);
152	>	assertEquals(-2,ai.getAndIncrement());
153	>	assertEquals(-1,ai.getAndIncrement());
154	>	assertEquals(0,ai.getAndIncrement());
155	>	assertEquals(1,ai.get());
156		}
157
158		/**
159		* addAndGet adds given value to current, and returns current value
160		*/
161	<	public void testAddAndGet(){
161	>	public void testAddAndGet() {
162		AtomicLong ai = new AtomicLong(1);
163	<	assertEquals(3,ai.addAndGet(2));
164	<	assertEquals(3,ai.get());
165	<	assertEquals(-1,ai.addAndGet(-4));
166	<	assertEquals(-1,ai.get());
163	>	assertEquals(3,ai.addAndGet(2));
164	>	assertEquals(3,ai.get());
165	>	assertEquals(-1,ai.addAndGet(-4));
166	>	assertEquals(-1,ai.get());
167		}
168
169		/**
170		* decrementAndGet decrements and returns current value
171		*/
172	<	public void testDecrementAndGet(){
172	>	public void testDecrementAndGet() {
173		AtomicLong ai = new AtomicLong(1);
174	<	assertEquals(0,ai.decrementAndGet());
175	<	assertEquals(-1,ai.decrementAndGet());
176	<	assertEquals(-2,ai.decrementAndGet());
177	<	assertEquals(-2,ai.get());
174	>	assertEquals(0,ai.decrementAndGet());
175	>	assertEquals(-1,ai.decrementAndGet());
176	>	assertEquals(-2,ai.decrementAndGet());
177	>	assertEquals(-2,ai.get());
178		}
179
180		/**
181		* incrementAndGet increments and returns current value
182		*/
183	<	public void testIncrementAndGet(){
183	>	public void testIncrementAndGet() {
184		AtomicLong ai = new AtomicLong(1);
185	<	assertEquals(2,ai.incrementAndGet());
186	<	assertEquals(2,ai.get());
187	<	ai.set(-2);
188	<	assertEquals(-1,ai.incrementAndGet());
189	<	assertEquals(0,ai.incrementAndGet());
190	<	assertEquals(1,ai.incrementAndGet());
191	<	assertEquals(1,ai.get());
185	>	assertEquals(2,ai.incrementAndGet());
186	>	assertEquals(2,ai.get());
187	>	ai.set(-2);
188	>	assertEquals(-1,ai.incrementAndGet());
189	>	assertEquals(0,ai.incrementAndGet());
190	>	assertEquals(1,ai.incrementAndGet());
191	>	assertEquals(1,ai.get());
192		}
193
194		/**
195		* a deserialized serialized atomic holds same value
196		*/
197	<	public void testSerialization() {
197	>	public void testSerialization() throws Exception {
198		AtomicLong l = new AtomicLong();
199
200	<	try {
201	<	l.set(-22);
202	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
203	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
204	<	out.writeObject(l);
205	<	out.close();
206	<
207	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
208	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
209	<	AtomicLong r = (AtomicLong) in.readObject();
195	<	assertEquals(l.get(), r.get());
196	<	} catch(Exception e){
197	<	unexpectedException();
198	<	}
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		}
211
212		/**
213		* toString returns current value.
214	<	*/
214	>	*/
215		public void testToString() {
216		AtomicLong ai = new AtomicLong();
217	<	for (long i = -12; i < 6; ++i) {
217	>	assertEquals("0", ai.toString());
218	>	for (long i : VALUES) {
219		ai.set(i);
220		assertEquals(ai.toString(), Long.toString(i));
221		}
222		}
223	+
224	+	/**
225	+	* intValue returns current value.
226	+	*/
227	+	public void testIntValue() {
228	+	AtomicLong ai = new AtomicLong();
229	+	assertEquals(0, ai.intValue());
230	+	for (long x : VALUES) {
231	+	ai.set(x);
232	+	assertEquals((int)x, ai.intValue());
233	+	}
234	+	}
235	+
236	+	/**
237	+	* longValue returns current value.
238	+	*/
239	+	public void testLongValue() {
240	+	AtomicLong ai = new AtomicLong();
241	+	assertEquals(0L, ai.longValue());
242	+	for (long x : VALUES) {
243	+	ai.set(x);
244	+	assertEquals((long)x, ai.longValue());
245	+	}
246	+	}
247	+
248	+	/**
249	+	* floatValue returns current value.
250	+	*/
251	+	public void testFloatValue() {
252	+	AtomicLong ai = new AtomicLong();
253	+	assertEquals(0.0f, ai.floatValue());
254	+	for (long x : VALUES) {
255	+	ai.set(x);
256	+	assertEquals((float)x, ai.floatValue());
257	+	}
258	+	}
259	+
260	+	/**
261	+	* doubleValue returns current value.
262	+	*/
263	+	public void testDoubleValue() {
264	+	AtomicLong ai = new AtomicLong();
265	+	assertEquals(0.0d, ai.doubleValue());
266	+	for (long x : VALUES) {
267	+	ai.set(x);
268	+	assertEquals((double)x, ai.doubleValue());
269	+	}
270	+	}
271	+
272		}

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