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

Comparing jsr166/src/test/tck/AtomicLongArrayTest.java (file contents):
Revision 1.3 by dl, Sun Sep 14 20:42:40 2003 UTC vs.
Revision 1.12 by jsr166, Mon Nov 16 05:30:07 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 AtomicLongArrayTest extends JSR166TestCase {
15		public static void main (String[] args) {
#	Line 17 | Line 19 | public class AtomicLongArrayTest extends
19		return new TestSuite(AtomicLongArrayTest.class);
20		}
21
22	<	public void testConstructor(){
22	>	/**
23	>	* constructor creates array of given size with all elements zero
24	>	*/
25	>	public void testConstructor() {
26		AtomicLongArray ai = new AtomicLongArray(SIZE);
27	<	for (int i = 0; i < SIZE; ++i)
27	>	for (int i = 0; i < SIZE; ++i)
28		assertEquals(0,ai.get(i));
29		}
30
31	<	public void testGetSet(){
32	<	AtomicLongArray ai = new AtomicLongArray(SIZE);
31	>	/**
32	>	* constructor with null array throws NPE
33	>	*/
34	>	public void testConstructor2NPE() {
35	>	try {
36	>	long[] a = null;
37	>	AtomicLongArray ai = new AtomicLongArray(a);
38	>	} catch (NullPointerException success) {
39	>	} catch (Exception ex) {
40	>	unexpectedException();
41	>	}
42	>	}
43	>
44	>	/**
45	>	* constructor with array is of same size and has all elements
46	>	*/
47	>	public void testConstructor2() {
48	>	long[] a = { 17L, 3L, -42L, 99L, -7L};
49	>	AtomicLongArray ai = new AtomicLongArray(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	>	AtomicLongArray ai = new AtomicLongArray(SIZE);
60	>	try {
61	>	ai.get(SIZE);
62	>	} catch (IndexOutOfBoundsException success) {
63	>	}
64	>	try {
65	>	ai.get(-1);
66	>	} catch (IndexOutOfBoundsException success) {
67	>	}
68	>	try {
69	>	ai.set(SIZE, 0);
70	>	} catch (IndexOutOfBoundsException success) {
71	>	}
72	>	try {
73	>	ai.set(-1, 0);
74	>	} catch (IndexOutOfBoundsException success) {
75	>	}
76	>	}
77	>
78	>	/**
79	>	* get returns the last value set at index
80	>	*/
81	>	public void testGetSet() {
82	>	AtomicLongArray ai = new AtomicLongArray(SIZE);
83		for (int i = 0; i < SIZE; ++i) {
84		ai.set(i, 1);
85		assertEquals(1,ai.get(i));
#	Line 35 | Line 90 | public class AtomicLongArrayTest extends
90		}
91		}
92
93	<	public void testCompareAndSet(){
94	<	AtomicLongArray ai = new AtomicLongArray(SIZE);
93	>	/**
94	>	* get returns the last value lazySet at index by same thread
95	>	*/
96	>	public void testGetLazySet() {
97	>	AtomicLongArray ai = new AtomicLongArray(SIZE);
98	>	for (int i = 0; i < SIZE; ++i) {
99	>	ai.lazySet(i, 1);
100	>	assertEquals(1,ai.get(i));
101	>	ai.lazySet(i, 2);
102	>	assertEquals(2,ai.get(i));
103	>	ai.lazySet(i, -3);
104	>	assertEquals(-3,ai.get(i));
105	>	}
106	>	}
107	>
108	>	/**
109	>	* compareAndSet succeeds in changing value if equal to expected else fails
110	>	*/
111	>	public void testCompareAndSet() {
112	>	AtomicLongArray ai = new AtomicLongArray(SIZE);
113		for (int i = 0; i < SIZE; ++i) {
114		ai.set(i, 1);
115		assertTrue(ai.compareAndSet(i, 1,2));
#	Line 49 | Line 122 | public class AtomicLongArrayTest extends
122		}
123		}
124
125	<	public void testWeakCompareAndSet(){
126	<	AtomicLongArray ai = new AtomicLongArray(SIZE);
125	>	/**
126	>	* compareAndSet in one thread enables another waiting for value
127	>	* to succeed
128	>	*/
129	>	public void testCompareAndSetInMultipleThreads() {
130	>	final AtomicLongArray a = new AtomicLongArray(1);
131	>	a.set(0, 1);
132	>	Thread t = new Thread(new Runnable() {
133	>	public void run() {
134	>	while (!a.compareAndSet(0, 2, 3)) Thread.yield();
135	>	}});
136	>	try {
137	>	t.start();
138	>	assertTrue(a.compareAndSet(0, 1, 2));
139	>	t.join(LONG_DELAY_MS);
140	>	assertFalse(t.isAlive());
141	>	assertEquals(a.get(0), 3);
142	>	}
143	>	catch (Exception e) {
144	>	unexpectedException();
145	>	}
146	>	}
147	>
148	>	/**
149	>	* repeated weakCompareAndSet succeeds in changing value when equal
150	>	* to expected
151	>	*/
152	>	public void testWeakCompareAndSet() {
153	>	AtomicLongArray ai = new AtomicLongArray(SIZE);
154		for (int i = 0; i < SIZE; ++i) {
155		ai.set(i, 1);
156	<	while(!ai.weakCompareAndSet(i, 1,2));
157	<	while(!ai.weakCompareAndSet(i, 2,-4));
156	>	while (!ai.weakCompareAndSet(i, 1,2));
157	>	while (!ai.weakCompareAndSet(i, 2,-4));
158		assertEquals(-4,ai.get(i));
159	<	while(!ai.weakCompareAndSet(i, -4,7));
159	>	while (!ai.weakCompareAndSet(i, -4,7));
160		assertEquals(7,ai.get(i));
161		}
162		}
163
164	<	public void testGetAndSet(){
165	<	AtomicLongArray ai = new AtomicLongArray(SIZE);
164	>	/**
165	>	*  getAndSet returns previous value and sets to given value at given index
166	>	*/
167	>	public void testGetAndSet() {
168	>	AtomicLongArray ai = new AtomicLongArray(SIZE);
169		for (int i = 0; i < SIZE; ++i) {
170		ai.set(i, 1);
171		assertEquals(1,ai.getAndSet(i,0));
#	Line 71 | Line 174 | public class AtomicLongArrayTest extends
174		}
175		}
176
177	<	public void testGetAndAdd(){
178	<	AtomicLongArray ai = new AtomicLongArray(SIZE);
177	>	/**
178	>	*  getAndAdd returns previous value and adds given value
179	>	*/
180	>	public void testGetAndAdd() {
181	>	AtomicLongArray ai = new AtomicLongArray(SIZE);
182		for (int i = 0; i < SIZE; ++i) {
183		ai.set(i, 1);
184		assertEquals(1,ai.getAndAdd(i,2));
#	Line 82 | Line 188 | public class AtomicLongArrayTest extends
188		}
189		}
190
191	<	public void testGetAndDecrement(){
192	<	AtomicLongArray ai = new AtomicLongArray(SIZE);
191	>	/**
192	>	* getAndDecrement returns previous value and decrements
193	>	*/
194	>	public void testGetAndDecrement() {
195	>	AtomicLongArray ai = new AtomicLongArray(SIZE);
196		for (int i = 0; i < SIZE; ++i) {
197		ai.set(i, 1);
198		assertEquals(1,ai.getAndDecrement(i));
#	Line 92 | Line 201 | public class AtomicLongArrayTest extends
201		}
202		}
203
204	<	public void testGetAndIncrement(){
205	<	AtomicLongArray ai = new AtomicLongArray(SIZE);
204	>	/**
205	>	* getAndIncrement returns previous value and increments
206	>	*/
207	>	public void testGetAndIncrement() {
208	>	AtomicLongArray ai = new AtomicLongArray(SIZE);
209		for (int i = 0; i < SIZE; ++i) {
210		ai.set(i, 1);
211		assertEquals(1,ai.getAndIncrement(i));
#	Line 106 | Line 218 | public class AtomicLongArrayTest extends
218		}
219		}
220
221	+	/**
222	+	*  addAndGet adds given value to current, and returns current value
223	+	*/
224		public void testAddAndGet() {
225	<	AtomicLongArray ai = new AtomicLongArray(SIZE);
225	>	AtomicLongArray ai = new AtomicLongArray(SIZE);
226		for (int i = 0; i < SIZE; ++i) {
227		ai.set(i, 1);
228		assertEquals(3,ai.addAndGet(i,2));
#	Line 117 | Line 232 | public class AtomicLongArrayTest extends
232		}
233		}
234
235	<	public void testDecrementAndGet(){
236	<	AtomicLongArray ai = new AtomicLongArray(SIZE);
235	>	/**
236	>	* decrementAndGet decrements and returns current value
237	>	*/
238	>	public void testDecrementAndGet() {
239	>	AtomicLongArray ai = new AtomicLongArray(SIZE);
240		for (int i = 0; i < SIZE; ++i) {
241		ai.set(i, 1);
242		assertEquals(0,ai.decrementAndGet(i));
#	Line 128 | Line 246 | public class AtomicLongArrayTest extends
246		}
247		}
248
249	+	/**
250	+	* incrementAndGet increments and returns current value
251	+	*/
252		public void testIncrementAndGet() {
253	<	AtomicLongArray ai = new AtomicLongArray(SIZE);
253	>	AtomicLongArray ai = new AtomicLongArray(SIZE);
254		for (int i = 0; i < SIZE; ++i) {
255		ai.set(i, 1);
256		assertEquals(2,ai.incrementAndGet(i));
#	Line 143 | Line 264 | public class AtomicLongArrayTest extends
264		}
265
266		static final long COUNTDOWN = 100000;
267	<
267	>
268		class Counter implements Runnable {
269		final AtomicLongArray ai;
270		volatile long counts;
#	Line 166 | Line 287 | public class AtomicLongArrayTest extends
287		}
288		}
289
290	+	/**
291	+	* Multiple threads using same array of counters successfully
292	+	* update a number of times equal to total count
293	+	*/
294		public void testCountingInMultipleThreads() {
295		try {
296	<	final AtomicLongArray ai = new AtomicLongArray(SIZE);
297	<	for (int i = 0; i < SIZE; ++i)
296	>	final AtomicLongArray ai = new AtomicLongArray(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);
#	Line 181 | Line 306 | public class AtomicLongArrayTest extends
306		t2.join();
307		assertEquals(c1.counts+c2.counts, SIZE * COUNTDOWN);
308		}
309	<	catch(InterruptedException ie) {
310	<	fail("unexpected exception");
309	>	catch (InterruptedException ie) {
310	>	unexpectedException();
311		}
312		}
313
314	+	/**
315	+	* a deserialized serialized array holds same values
316	+	*/
317		public void testSerialization() {
318	<	AtomicLongArray l = new AtomicLongArray(SIZE);
319	<	for (int i = 0; i < SIZE; ++i)
318	>	AtomicLongArray l = new AtomicLongArray(SIZE);
319	>	for (int i = 0; i < SIZE; ++i)
320		l.set(i, -i);
321
322		try {
#	Line 203 | Line 331 | public class AtomicLongArrayTest extends
331		for (int i = 0; i < SIZE; ++i) {
332		assertEquals(l.get(i), r.get(i));
333		}
334	<	} catch(Exception e){
335	<	e.printStackTrace();
208	<	fail("unexpected exception");
334	>	} catch (Exception e) {
335	>	unexpectedException();
336		}
337		}
338
339	+	/**
340	+	* toString returns current value.
341	+	*/
342	+	public void testToString() {
343	+	long[] a = { 17, 3, -42, 99, -7};
344	+	AtomicLongArray ai = new AtomicLongArray(a);
345	+	assertEquals(Arrays.toString(a), ai.toString());
346	+	}
347	+
348
349		}

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