ViewVC Help

View File | Revision Log | Show Annotations | Download File | Root Listing

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

Comparing jsr166/src/test/tck/AtomicLongArrayTest.java (file contents):
Revision 1.6 by dl, Sat Dec 27 19:26:43 2003 UTC vs.
Revision 1.25 by jsr166, Wed Aug 10 07:14:48 2011 UTC

#	Line 1 | Line 1
1		/*
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.
4	>	* http://creativecommons.org/publicdomain/zero/1.0/
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.*;
10	>	import java.util.Arrays;
11	>	import java.util.concurrent.atomic.AtomicLongArray;
12
13		public class AtomicLongArrayTest extends JSR166TestCase {
14	<	public static void main (String[] args) {
15	<	junit.textui.TestRunner.run (suite());
14	>	public static void main(String[] args) {
15	>	junit.textui.TestRunner.run(suite());
16		}
17		public static Test suite() {
18		return new TestSuite(AtomicLongArrayTest.class);
#	Line 21 | Line 21 | public class AtomicLongArrayTest extends
21		/**
22		* constructor creates array of given size with all elements zero
23		*/
24	<	public void testConstructor(){
25	<	AtomicLongArray ai = new AtomicLongArray(SIZE);
26	<	for (int i = 0; i < SIZE; ++i)
27	<	assertEquals(0,ai.get(i));
24	>	public void testConstructor() {
25	>	AtomicLongArray aa = new AtomicLongArray(SIZE);
26	>	for (int i = 0; i < SIZE; i++)
27	>	assertEquals(0, aa.get(i));
28		}
29
30		/**
31	<	* get and set for out of bound indices throw IndexOutOfBoundsException
31	>	* constructor with null array throws NPE
32		*/
33	<	public void testIndexing(){
34	<	AtomicLongArray ai = new AtomicLongArray(SIZE);
35	<	try {
36	<	ai.get(SIZE);
37	<	} catch(IndexOutOfBoundsException success){
38	<	}
39	<	try {
40	<	ai.get(-1);
41	<	} catch(IndexOutOfBoundsException success){
42	<	}
33	>	public void testConstructor2NPE() {
34		try {
35	<	ai.set(SIZE, 0);
36	<	} catch(IndexOutOfBoundsException success){
37	<	}
38	<	try {
39	<	ai.set(-1, 0);
40	<	} catch(IndexOutOfBoundsException success){
35	>	long[] a = null;
36	>	AtomicLongArray aa = new AtomicLongArray(a);
37	>	shouldThrow();
38	>	} catch (NullPointerException success) {}
39	>	}
40	>
41	>	/**
42	>	* constructor with array is of same size and has all elements
43	>	*/
44	>	public void testConstructor2() {
45	>	long[] a = { 17L, 3L, -42L, 99L, -7L };
46	>	AtomicLongArray aa = new AtomicLongArray(a);
47	>	assertEquals(a.length, aa.length());
48	>	for (int i = 0; i < a.length; i++)
49	>	assertEquals(a[i], aa.get(i));
50	>	}
51	>
52	>	/**
53	>	* get and set for out of bound indices throw IndexOutOfBoundsException
54	>	*/
55	>	public void testIndexing() {
56	>	AtomicLongArray aa = new AtomicLongArray(SIZE);
57	>	for (int index : new int[] { -1, SIZE }) {
58	>	try {
59	>	aa.get(index);
60	>	shouldThrow();
61	>	} catch (IndexOutOfBoundsException success) {}
62	>	try {
63	>	aa.set(index, 1);
64	>	shouldThrow();
65	>	} catch (IndexOutOfBoundsException success) {}
66	>	try {
67	>	aa.lazySet(index, 1);
68	>	shouldThrow();
69	>	} catch (IndexOutOfBoundsException success) {}
70	>	try {
71	>	aa.compareAndSet(index, 1, 2);
72	>	shouldThrow();
73	>	} catch (IndexOutOfBoundsException success) {}
74	>	try {
75	>	aa.weakCompareAndSet(index, 1, 2);
76	>	shouldThrow();
77	>	} catch (IndexOutOfBoundsException success) {}
78	>	try {
79	>	aa.getAndAdd(index, 1);
80	>	shouldThrow();
81	>	} catch (IndexOutOfBoundsException success) {}
82	>	try {
83	>	aa.addAndGet(index, 1);
84	>	shouldThrow();
85	>	} catch (IndexOutOfBoundsException success) {}
86		}
87		}
88
89		/**
90		* get returns the last value set at index
91		*/
92	<	public void testGetSet(){
93	<	AtomicLongArray ai = new AtomicLongArray(SIZE);
94	<	for (int i = 0; i < SIZE; ++i) {
95	<	ai.set(i, 1);
96	<	assertEquals(1,ai.get(i));
97	<	ai.set(i, 2);
98	<	assertEquals(2,ai.get(i));
99	<	ai.set(i, -3);
100	<	assertEquals(-3,ai.get(i));
92	>	public void testGetSet() {
93	>	AtomicLongArray aa = new AtomicLongArray(SIZE);
94	>	for (int i = 0; i < SIZE; i++) {
95	>	aa.set(i, 1);
96	>	assertEquals(1, aa.get(i));
97	>	aa.set(i, 2);
98	>	assertEquals(2, aa.get(i));
99	>	aa.set(i, -3);
100	>	assertEquals(-3, aa.get(i));
101	>	}
102	>	}
103	>
104	>	/**
105	>	* get returns the last value lazySet at index by same thread
106	>	*/
107	>	public void testGetLazySet() {
108	>	AtomicLongArray aa = new AtomicLongArray(SIZE);
109	>	for (int i = 0; i < SIZE; i++) {
110	>	aa.lazySet(i, 1);
111	>	assertEquals(1, aa.get(i));
112	>	aa.lazySet(i, 2);
113	>	assertEquals(2, aa.get(i));
114	>	aa.lazySet(i, -3);
115	>	assertEquals(-3, aa.get(i));
116		}
117		}
118
119		/**
120		* compareAndSet succeeds in changing value if equal to expected else fails
121		*/
122	<	public void testCompareAndSet(){
123	<	AtomicLongArray ai = new AtomicLongArray(SIZE);
124	<	for (int i = 0; i < SIZE; ++i) {
125	<	ai.set(i, 1);
126	<	assertTrue(ai.compareAndSet(i, 1,2));
127	<	assertTrue(ai.compareAndSet(i, 2,-4));
128	<	assertEquals(-4,ai.get(i));
129	<	assertFalse(ai.compareAndSet(i, -5,7));
130	<	assertFalse((7 == ai.get(i)));
131	<	assertTrue(ai.compareAndSet(i, -4,7));
132	<	assertEquals(7,ai.get(i));
122	>	public void testCompareAndSet() {
123	>	AtomicLongArray aa = new AtomicLongArray(SIZE);
124	>	for (int i = 0; i < SIZE; i++) {
125	>	aa.set(i, 1);
126	>	assertTrue(aa.compareAndSet(i, 1, 2));
127	>	assertTrue(aa.compareAndSet(i, 2, -4));
128	>	assertEquals(-4, aa.get(i));
129	>	assertFalse(aa.compareAndSet(i, -5, 7));
130	>	assertEquals(-4, aa.get(i));
131	>	assertTrue(aa.compareAndSet(i, -4, 7));
132	>	assertEquals(7, aa.get(i));
133		}
134		}
135
#	Line 86 | Line 137 | public class AtomicLongArrayTest extends
137		* compareAndSet in one thread enables another waiting for value
138		* to succeed
139		*/
140	<	public void testCompareAndSetInMultipleThreads() {
140	>	public void testCompareAndSetInMultipleThreads() throws InterruptedException {
141		final AtomicLongArray a = new AtomicLongArray(1);
142		a.set(0, 1);
143	<	Thread t = new Thread(new Runnable() {
144	<	public void run() {
145	<	while(!a.compareAndSet(0, 2, 3)) Thread.yield();
146	<	}});
147	<	try {
148	<	t.start();
149	<	assertTrue(a.compareAndSet(0, 1, 2));
150	<	t.join(LONG_DELAY_MS);
151	<	assertFalse(t.isAlive());
152	<	assertEquals(a.get(0), 3);
153	<	}
103	<	catch(Exception e) {
104	<	unexpectedException();
105	<	}
143	>	Thread t = new Thread(new CheckedRunnable() {
144	>	public void realRun() {
145	>	while (!a.compareAndSet(0, 2, 3))
146	>	Thread.yield();
147	>	}});
148	>
149	>	t.start();
150	>	assertTrue(a.compareAndSet(0, 1, 2));
151	>	t.join(LONG_DELAY_MS);
152	>	assertFalse(t.isAlive());
153	>	assertEquals(3, a.get(0));
154		}
155
156		/**
157		* repeated weakCompareAndSet succeeds in changing value when equal
158	<	* to expected
158	>	* to expected
159		*/
160	<	public void testWeakCompareAndSet(){
161	<	AtomicLongArray ai = new AtomicLongArray(SIZE);
162	<	for (int i = 0; i < SIZE; ++i) {
163	<	ai.set(i, 1);
164	<	while(!ai.weakCompareAndSet(i, 1,2));
165	<	while(!ai.weakCompareAndSet(i, 2,-4));
166	<	assertEquals(-4,ai.get(i));
167	<	while(!ai.weakCompareAndSet(i, -4,7));
168	<	assertEquals(7,ai.get(i));
160	>	public void testWeakCompareAndSet() {
161	>	AtomicLongArray aa = new AtomicLongArray(SIZE);
162	>	for (int i = 0; i < SIZE; i++) {
163	>	aa.set(i, 1);
164	>	while (!aa.weakCompareAndSet(i, 1, 2));
165	>	while (!aa.weakCompareAndSet(i, 2, -4));
166	>	assertEquals(-4, aa.get(i));
167	>	while (!aa.weakCompareAndSet(i, -4, 7));
168	>	assertEquals(7, aa.get(i));
169		}
170		}
171
172		/**
173	<	*  getAndSet returns previous value and sets to given value at given index
173	>	* getAndSet returns previous value and sets to given value at given index
174		*/
175	<	public void testGetAndSet(){
176	<	AtomicLongArray ai = new AtomicLongArray(SIZE);
177	<	for (int i = 0; i < SIZE; ++i) {
178	<	ai.set(i, 1);
179	<	assertEquals(1,ai.getAndSet(i,0));
180	<	assertEquals(0,ai.getAndSet(i,-10));
181	<	assertEquals(-10,ai.getAndSet(i,1));
175	>	public void testGetAndSet() {
176	>	AtomicLongArray aa = new AtomicLongArray(SIZE);
177	>	for (int i = 0; i < SIZE; i++) {
178	>	aa.set(i, 1);
179	>	assertEquals(1, aa.getAndSet(i, 0));
180	>	assertEquals(0, aa.getAndSet(i, -10));
181	>	assertEquals(-10, aa.getAndSet(i, 1));
182		}
183		}
184
185		/**
186	<	*  getAndAdd returns previous value and adds given value
186	>	* getAndAdd returns previous value and adds given value
187		*/
188	<	public void testGetAndAdd(){
189	<	AtomicLongArray ai = new AtomicLongArray(SIZE);
190	<	for (int i = 0; i < SIZE; ++i) {
191	<	ai.set(i, 1);
192	<	assertEquals(1,ai.getAndAdd(i,2));
193	<	assertEquals(3,ai.get(i));
194	<	assertEquals(3,ai.getAndAdd(i,-4));
195	<	assertEquals(-1,ai.get(i));
188	>	public void testGetAndAdd() {
189	>	AtomicLongArray aa = new AtomicLongArray(SIZE);
190	>	for (int i = 0; i < SIZE; i++) {
191	>	aa.set(i, 1);
192	>	assertEquals(1, aa.getAndAdd(i, 2));
193	>	assertEquals(3, aa.get(i));
194	>	assertEquals(3, aa.getAndAdd(i, -4));
195	>	assertEquals(-1, aa.get(i));
196		}
197		}
198
199		/**
200		* getAndDecrement returns previous value and decrements
201		*/
202	<	public void testGetAndDecrement(){
203	<	AtomicLongArray ai = new AtomicLongArray(SIZE);
204	<	for (int i = 0; i < SIZE; ++i) {
205	<	ai.set(i, 1);
206	<	assertEquals(1,ai.getAndDecrement(i));
207	<	assertEquals(0,ai.getAndDecrement(i));
208	<	assertEquals(-1,ai.getAndDecrement(i));
202	>	public void testGetAndDecrement() {
203	>	AtomicLongArray aa = new AtomicLongArray(SIZE);
204	>	for (int i = 0; i < SIZE; i++) {
205	>	aa.set(i, 1);
206	>	assertEquals(1, aa.getAndDecrement(i));
207	>	assertEquals(0, aa.getAndDecrement(i));
208	>	assertEquals(-1, aa.getAndDecrement(i));
209		}
210		}
211
212		/**
213		* getAndIncrement returns previous value and increments
214		*/
215	<	public void testGetAndIncrement(){
216	<	AtomicLongArray ai = new AtomicLongArray(SIZE);
217	<	for (int i = 0; i < SIZE; ++i) {
218	<	ai.set(i, 1);
219	<	assertEquals(1,ai.getAndIncrement(i));
220	<	assertEquals(2,ai.get(i));
221	<	ai.set(i,-2);
222	<	assertEquals(-2,ai.getAndIncrement(i));
223	<	assertEquals(-1,ai.getAndIncrement(i));
224	<	assertEquals(0,ai.getAndIncrement(i));
225	<	assertEquals(1,ai.get(i));
215	>	public void testGetAndIncrement() {
216	>	AtomicLongArray aa = new AtomicLongArray(SIZE);
217	>	for (int i = 0; i < SIZE; i++) {
218	>	aa.set(i, 1);
219	>	assertEquals(1, aa.getAndIncrement(i));
220	>	assertEquals(2, aa.get(i));
221	>	aa.set(i, -2);
222	>	assertEquals(-2, aa.getAndIncrement(i));
223	>	assertEquals(-1, aa.getAndIncrement(i));
224	>	assertEquals(0, aa.getAndIncrement(i));
225	>	assertEquals(1, aa.get(i));
226		}
227		}
228
229		/**
230	<	*  addAndGet adds given value to current, and returns current value
230	>	* addAndGet adds given value to current, and returns current value
231		*/
232		public void testAddAndGet() {
233	<	AtomicLongArray ai = new AtomicLongArray(SIZE);
234	<	for (int i = 0; i < SIZE; ++i) {
235	<	ai.set(i, 1);
236	<	assertEquals(3,ai.addAndGet(i,2));
237	<	assertEquals(3,ai.get(i));
238	<	assertEquals(-1,ai.addAndGet(i,-4));
239	<	assertEquals(-1,ai.get(i));
233	>	AtomicLongArray aa = new AtomicLongArray(SIZE);
234	>	for (int i = 0; i < SIZE; i++) {
235	>	aa.set(i, 1);
236	>	assertEquals(3, aa.addAndGet(i, 2));
237	>	assertEquals(3, aa.get(i));
238	>	assertEquals(-1, aa.addAndGet(i, -4));
239	>	assertEquals(-1, aa.get(i));
240		}
241		}
242
243		/**
244		* decrementAndGet decrements and returns current value
245		*/
246	<	public void testDecrementAndGet(){
247	<	AtomicLongArray ai = new AtomicLongArray(SIZE);
248	<	for (int i = 0; i < SIZE; ++i) {
249	<	ai.set(i, 1);
250	<	assertEquals(0,ai.decrementAndGet(i));
251	<	assertEquals(-1,ai.decrementAndGet(i));
252	<	assertEquals(-2,ai.decrementAndGet(i));
253	<	assertEquals(-2,ai.get(i));
246	>	public void testDecrementAndGet() {
247	>	AtomicLongArray aa = new AtomicLongArray(SIZE);
248	>	for (int i = 0; i < SIZE; i++) {
249	>	aa.set(i, 1);
250	>	assertEquals(0, aa.decrementAndGet(i));
251	>	assertEquals(-1, aa.decrementAndGet(i));
252	>	assertEquals(-2, aa.decrementAndGet(i));
253	>	assertEquals(-2, aa.get(i));
254		}
255		}
256
#	Line 210 | Line 258 | public class AtomicLongArrayTest extends
258		* incrementAndGet increments and returns current value
259		*/
260		public void testIncrementAndGet() {
261	<	AtomicLongArray ai = new AtomicLongArray(SIZE);
262	<	for (int i = 0; i < SIZE; ++i) {
263	<	ai.set(i, 1);
264	<	assertEquals(2,ai.incrementAndGet(i));
265	<	assertEquals(2,ai.get(i));
266	<	ai.set(i, -2);
267	<	assertEquals(-1,ai.incrementAndGet(i));
268	<	assertEquals(0,ai.incrementAndGet(i));
269	<	assertEquals(1,ai.incrementAndGet(i));
270	<	assertEquals(1,ai.get(i));
261	>	AtomicLongArray aa = new AtomicLongArray(SIZE);
262	>	for (int i = 0; i < SIZE; i++) {
263	>	aa.set(i, 1);
264	>	assertEquals(2, aa.incrementAndGet(i));
265	>	assertEquals(2, aa.get(i));
266	>	aa.set(i, -2);
267	>	assertEquals(-1, aa.incrementAndGet(i));
268	>	assertEquals(0, aa.incrementAndGet(i));
269	>	assertEquals(1, aa.incrementAndGet(i));
270	>	assertEquals(1, aa.get(i));
271		}
272		}
273
274		static final long COUNTDOWN = 100000;
275	<
276	<	class Counter implements Runnable {
277	<	final AtomicLongArray ai;
275	>
276	>	class Counter extends CheckedRunnable {
277	>	final AtomicLongArray aa;
278		volatile long counts;
279	<	Counter(AtomicLongArray a) { ai = a; }
280	<	public void run() {
279	>	Counter(AtomicLongArray a) { aa = a; }
280	>	public void realRun() {
281		for (;;) {
282		boolean done = true;
283	<	for (int i = 0; i < ai.length(); ++i) {
284	<	long v = ai.get(i);
285	<	threadAssertTrue(v >= 0);
283	>	for (int i = 0; i < aa.length(); i++) {
284	>	long v = aa.get(i);
285	>	assertTrue(v >= 0);
286		if (v != 0) {
287		done = false;
288	<	if (ai.compareAndSet(i, v, v-1))
288	>	if (aa.compareAndSet(i, v, v-1))
289		++counts;
290		}
291		}
#	Line 251 | Line 299 | public class AtomicLongArrayTest extends
299		* Multiple threads using same array of counters successfully
300		* update a number of times equal to total count
301		*/
302	<	public void testCountingInMultipleThreads() {
303	<	try {
304	<	final AtomicLongArray ai = new AtomicLongArray(SIZE);
305	<	for (int i = 0; i < SIZE; ++i)
306	<	ai.set(i, COUNTDOWN);
307	<	Counter c1 = new Counter(ai);
308	<	Counter c2 = new Counter(ai);
309	<	Thread t1 = new Thread(c1);
310	<	Thread t2 = new Thread(c2);
311	<	t1.start();
312	<	t2.start();
313	<	t1.join();
314	<	t2.join();
267	<	assertEquals(c1.counts+c2.counts, SIZE * COUNTDOWN);
268	<	}
269	<	catch(InterruptedException ie) {
270	<	unexpectedException();
271	<	}
302	>	public void testCountingInMultipleThreads() throws InterruptedException {
303	>	final AtomicLongArray aa = new AtomicLongArray(SIZE);
304	>	for (int i = 0; i < SIZE; i++)
305	>	aa.set(i, COUNTDOWN);
306	>	Counter c1 = new Counter(aa);
307	>	Counter c2 = new Counter(aa);
308	>	Thread t1 = new Thread(c1);
309	>	Thread t2 = new Thread(c2);
310	>	t1.start();
311	>	t2.start();
312	>	t1.join();
313	>	t2.join();
314	>	assertEquals(c1.counts+c2.counts, SIZE * COUNTDOWN);
315		}
316
317		/**
318		* a deserialized serialized array holds same values
319		*/
320	<	public void testSerialization() {
321	<	AtomicLongArray l = new AtomicLongArray(SIZE);
322	<	for (int i = 0; i < SIZE; ++i)
323	<	l.set(i, -i);
324	<
325	<	try {
326	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
327	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
328	<	out.writeObject(l);
286	<	out.close();
287	<
288	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
289	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
290	<	AtomicLongArray r = (AtomicLongArray) in.readObject();
291	<	for (int i = 0; i < SIZE; ++i) {
292	<	assertEquals(l.get(i), r.get(i));
293	<	}
294	<	} catch(Exception e){
295	<	unexpectedException();
320	>	public void testSerialization() throws Exception {
321	>	AtomicLongArray x = new AtomicLongArray(SIZE);
322	>	for (int i = 0; i < SIZE; i++)
323	>	x.set(i, -i);
324	>	AtomicLongArray y = serialClone(x);
325	>	assertTrue(x != y);
326	>	assertEquals(x.length(), y.length());
327	>	for (int i = 0; i < SIZE; i++) {
328	>	assertEquals(x.get(i), y.get(i));
329		}
330		}
331
332	+	/**
333	+	* toString returns current value.
334	+	*/
335	+	public void testToString() {
336	+	long[] a = { 17, 3, -42, 99, -7 };
337	+	AtomicLongArray aa = new AtomicLongArray(a);
338	+	assertEquals(Arrays.toString(a), aa.toString());
339	+	}
340
341		}

Diff Legend

–	Removed lines
+	Added lines
<	Changed lines
>	Changed lines