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Comparing jsr166/src/test/tck/AtomicIntegerArrayTest.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 06:58:50 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	+	import java.util.*;
13
14		public class AtomicIntegerArrayTest extends JSR166TestCase {
15
#	Line 20 | Line 22 | public class AtomicIntegerArrayTest exte
22
23
24		/**
25	<	*
25	>	* constructor creates array of given size with all elements zero
26		*/
27		public void testConstructor() {
28		AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
29	<	for (int i = 0; i < SIZE; ++i)
29	>	for (int i = 0; i < SIZE; ++i)
30		assertEquals(0,ai.get(i));
31		}
32
33		/**
34	<	*
34	>	* constructor with null array throws NPE
35	>	*/
36	>	public void testConstructor2NPE() {
37	>	try {
38	>	int[] a = null;
39	>	AtomicIntegerArray ai = new AtomicIntegerArray(a);
40	>	shouldThrow();
41	>	} catch (NullPointerException success) {}
42	>	}
43	>
44	>	/**
45	>	* constructor with array is of same size and has all elements
46	>	*/
47	>	public void testConstructor2() {
48	>	int[] a = { 17, 3, -42, 99, -7};
49	>	AtomicIntegerArray ai = new AtomicIntegerArray(a);
50	>	assertEquals(a.length, ai.length());
51	>	for (int i = 0; i < a.length; ++i)
52	>	assertEquals(a[i], ai.get(i));
53	>	}
54	>
55	>	/**
56	>	* get and set for out of bound indices throw IndexOutOfBoundsException
57	>	*/
58	>	public void testIndexing() {
59	>	AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
60	>	try {
61	>	ai.get(SIZE);
62	>	shouldThrow();
63	>	} catch (IndexOutOfBoundsException success) {
64	>	}
65	>	try {
66	>	ai.get(-1);
67	>	shouldThrow();
68	>	} catch (IndexOutOfBoundsException success) {
69	>	}
70	>	try {
71	>	ai.set(SIZE, 0);
72	>	shouldThrow();
73	>	} catch (IndexOutOfBoundsException success) {
74	>	}
75	>	try {
76	>	ai.set(-1, 0);
77	>	shouldThrow();
78	>	} catch (IndexOutOfBoundsException success) {
79	>	}
80	>	}
81	>
82	>	/**
83	>	* get returns the last value set at index
84		*/
85		public void testGetSet() {
86	<	AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
86	>	AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
87		for (int i = 0; i < SIZE; ++i) {
88		ai.set(i, 1);
89		assertEquals(1,ai.get(i));
#	Line 44 | Line 95 | public class AtomicIntegerArrayTest exte
95		}
96
97		/**
98	<	*
98	>	* get returns the last value lazySet at index by same thread
99	>	*/
100	>	public void testGetLazySet() {
101	>	AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
102	>	for (int i = 0; i < SIZE; ++i) {
103	>	ai.lazySet(i, 1);
104	>	assertEquals(1,ai.get(i));
105	>	ai.lazySet(i, 2);
106	>	assertEquals(2,ai.get(i));
107	>	ai.lazySet(i, -3);
108	>	assertEquals(-3,ai.get(i));
109	>	}
110	>	}
111	>
112	>	/**
113	>	* compareAndSet succeeds in changing value if equal to expected else fails
114		*/
115		public void testCompareAndSet() {
116	<	AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
116	>	AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
117		for (int i = 0; i < SIZE; ++i) {
118		ai.set(i, 1);
119		assertTrue(ai.compareAndSet(i, 1,2));
#	Line 61 | Line 127 | public class AtomicIntegerArrayTest exte
127		}
128
129		/**
130	<	*
130	>	* compareAndSet in one thread enables another waiting for value
131	>	* to succeed
132	>	*/
133	>	public void testCompareAndSetInMultipleThreads() throws Exception {
134	>	final AtomicIntegerArray a = new AtomicIntegerArray(1);
135	>	a.set(0, 1);
136	>	Thread t = new Thread(new CheckedRunnable() {
137	>	public void realRun() {
138	>	while (!a.compareAndSet(0, 2, 3))
139	>	Thread.yield();
140	>	}});
141	>
142	>	t.start();
143	>	assertTrue(a.compareAndSet(0, 1, 2));
144	>	t.join(LONG_DELAY_MS);
145	>	assertFalse(t.isAlive());
146	>	assertEquals(a.get(0), 3);
147	>	}
148	>
149	>	/**
150	>	* repeated weakCompareAndSet succeeds in changing value when equal
151	>	* to expected
152		*/
153		public void testWeakCompareAndSet() {
154	<	AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
154	>	AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
155		for (int i = 0; i < SIZE; ++i) {
156		ai.set(i, 1);
157	<	while(!ai.weakCompareAndSet(i, 1,2));
158	<	while(!ai.weakCompareAndSet(i, 2,-4));
157	>	while (!ai.weakCompareAndSet(i, 1,2));
158	>	while (!ai.weakCompareAndSet(i, 2,-4));
159		assertEquals(-4,ai.get(i));
160	<	while(!ai.weakCompareAndSet(i, -4,7));
160	>	while (!ai.weakCompareAndSet(i, -4,7));
161		assertEquals(7,ai.get(i));
162		}
163		}
164
165		/**
166	<	*
166	>	*  getAndSet returns previous value and sets to given value at given index
167		*/
168		public void testGetAndSet() {
169	<	AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
169	>	AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
170		for (int i = 0; i < SIZE; ++i) {
171		ai.set(i, 1);
172		assertEquals(1,ai.getAndSet(i,0));
#	Line 89 | Line 176 | public class AtomicIntegerArrayTest exte
176		}
177
178		/**
179	<	*
179	>	*  getAndAdd returns previous value and adds given value
180		*/
181		public void testGetAndAdd() {
182	<	AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
182	>	AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
183		for (int i = 0; i < SIZE; ++i) {
184		ai.set(i, 1);
185		assertEquals(1,ai.getAndAdd(i,2));
#	Line 103 | Line 190 | public class AtomicIntegerArrayTest exte
190		}
191
192		/**
193	<	*
193	>	* getAndDecrement returns previous value and decrements
194		*/
195		public void testGetAndDecrement() {
196	<	AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
196	>	AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
197		for (int i = 0; i < SIZE; ++i) {
198		ai.set(i, 1);
199		assertEquals(1,ai.getAndDecrement(i));
#	Line 116 | Line 203 | public class AtomicIntegerArrayTest exte
203		}
204
205		/**
206	<	*
206	>	* getAndIncrement returns previous value and increments
207		*/
208		public void testGetAndIncrement() {
209	<	AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
209	>	AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
210		for (int i = 0; i < SIZE; ++i) {
211		ai.set(i, 1);
212		assertEquals(1,ai.getAndIncrement(i));
#	Line 133 | Line 220 | public class AtomicIntegerArrayTest exte
220		}
221
222		/**
223	<	*
223	>	*  addAndGet adds given value to current, and returns current value
224		*/
225		public void testAddAndGet() {
226	<	AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
226	>	AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
227		for (int i = 0; i < SIZE; ++i) {
228		ai.set(i, 1);
229		assertEquals(3,ai.addAndGet(i,2));
#	Line 147 | Line 234 | public class AtomicIntegerArrayTest exte
234		}
235
236		/**
237	<	*
237	>	* decrementAndGet decrements and returns current value
238		*/
239		public void testDecrementAndGet() {
240	<	AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
240	>	AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
241		for (int i = 0; i < SIZE; ++i) {
242		ai.set(i, 1);
243		assertEquals(0,ai.decrementAndGet(i));
#	Line 161 | Line 248 | public class AtomicIntegerArrayTest exte
248		}
249
250		/**
251	<	*
251	>	*  incrementAndGet increments and returns current value
252		*/
253		public void testIncrementAndGet() {
254	<	AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
254	>	AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
255		for (int i = 0; i < SIZE; ++i) {
256		ai.set(i, 1);
257		assertEquals(2,ai.incrementAndGet(i));
#	Line 178 | Line 265 | public class AtomicIntegerArrayTest exte
265		}
266
267		static final int COUNTDOWN = 100000;
268	<
268	>
269		class Counter implements Runnable {
270		final AtomicIntegerArray ai;
271		volatile int counts;
#	Line 202 | Line 289 | public class AtomicIntegerArrayTest exte
289		}
290
291		/**
292	<	*
292	>	* Multiple threads using same array of counters successfully
293	>	* update a number of times equal to total count
294		*/
295	<	public void testCountingInMultipleThreads() {
296	<	try {
297	<	final AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
298	<	for (int i = 0; i < SIZE; ++i)
299	<	ai.set(i, COUNTDOWN);
300	<	Counter c1 = new Counter(ai);
301	<	Counter c2 = new Counter(ai);
302	<	Thread t1 = new Thread(c1);
303	<	Thread t2 = new Thread(c2);
304	<	t1.start();
305	<	t2.start();
306	<	t1.join();
307	<	t2.join();
220	<	assertEquals(c1.counts+c2.counts, SIZE * COUNTDOWN);
221	<	}
222	<	catch(InterruptedException ie) {
223	<	unexpectedException();
224	<	}
295	>	public void testCountingInMultipleThreads() throws InterruptedException {
296	>	final AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
297	>	for (int i = 0; i < SIZE; ++i)
298	>	ai.set(i, COUNTDOWN);
299	>	Counter c1 = new Counter(ai);
300	>	Counter c2 = new Counter(ai);
301	>	Thread t1 = new Thread(c1);
302	>	Thread t2 = new Thread(c2);
303	>	t1.start();
304	>	t2.start();
305	>	t1.join();
306	>	t2.join();
307	>	assertEquals(c1.counts+c2.counts, SIZE * COUNTDOWN);
308		}
309
310
311		/**
312	<	*
313	<	*/
314	<	public void testSerialization() {
315	<	AtomicIntegerArray l = new AtomicIntegerArray(SIZE);
316	<	for (int i = 0; i < SIZE; ++i)
312	>	* a deserialized serialized array holds same values
313	>	*/
314	>	public void testSerialization() throws Exception {
315	>	AtomicIntegerArray l = new AtomicIntegerArray(SIZE);
316	>	for (int i = 0; i < SIZE; ++i)
317		l.set(i, -i);
318
319	<	try {
320	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
321	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
322	<	out.writeObject(l);
323	<	out.close();
324	<
325	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
326	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
327	<	AtomicIntegerArray r = (AtomicIntegerArray) in.readObject();
328	<	for (int i = 0; i < SIZE; ++i) {
246	<	assertEquals(l.get(i), r.get(i));
247	<	}
248	<	} catch(Exception e){
249	<	e.printStackTrace();
250	<	unexpectedException();
319	>	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
320	>	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
321	>	out.writeObject(l);
322	>	out.close();
323	>
324	>	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
325	>	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
326	>	AtomicIntegerArray r = (AtomicIntegerArray) in.readObject();
327	>	for (int i = 0; i < SIZE; ++i) {
328	>	assertEquals(l.get(i), r.get(i));
329		}
330		}
331
332	+
333	+	/**
334	+	* toString returns current value.
335	+	*/
336	+	public void testToString() {
337	+	int[] a = { 17, 3, -42, 99, -7};
338	+	AtomicIntegerArray ai = new AtomicIntegerArray(a);
339	+	assertEquals(Arrays.toString(a), ai.toString());
340	+	}
341	+
342		}

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