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Comparing jsr166/src/test/tck/AtomicIntegerArrayTest.java (file contents):
Revision 1.7 by dl, Thu Jan 8 01:29:46 2004 UTC vs.
Revision 1.27 by jsr166, Thu May 30 03:28:55 2013 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.AtomicIntegerArray;
12
13		public class AtomicIntegerArrayTest extends JSR166TestCase {
14
15	<	public static void main (String[] args) {
16	<	junit.textui.TestRunner.run (suite());
15	>	public static void main(String[] args) {
16	>	junit.textui.TestRunner.run(suite());
17		}
18		public static Test suite() {
19		return new TestSuite(AtomicIntegerArrayTest.class);
20		}
21
22	–
22		/**
23		* constructor creates array of given size with all elements zero
24		*/
25		public void testConstructor() {
26	<	AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
27	<	for (int i = 0; i < SIZE; ++i)
28	<	assertEquals(0,ai.get(i));
26	>	AtomicIntegerArray aa = new AtomicIntegerArray(SIZE);
27	>	for (int i = 0; i < SIZE; i++)
28	>	assertEquals(0, aa.get(i));
29		}
30
31		/**
#	Line 35 | Line 34 | public class AtomicIntegerArrayTest exte
34		public void testConstructor2NPE() {
35		try {
36		int[] a = null;
37	<	AtomicIntegerArray ai = new AtomicIntegerArray(a);
38	<	} catch (NullPointerException success) {
39	<	} catch (Exception ex) {
41	<	unexpectedException();
42	<	}
37	>	AtomicIntegerArray aa = new AtomicIntegerArray(a);
38	>	shouldThrow();
39	>	} catch (NullPointerException success) {}
40		}
41
42		/**
43		* constructor with array is of same size and has all elements
44		*/
45		public void testConstructor2() {
46	<	int[] a = { 17, 3, -42, 99, -7};
47	<	AtomicIntegerArray ai = new AtomicIntegerArray(a);
48	<	assertEquals(a.length, ai.length());
49	<	for (int i = 0; i < a.length; ++i)
50	<	assertEquals(a[i], ai.get(i));
46	>	int[] a = { 17, 3, -42, 99, -7 };
47	>	AtomicIntegerArray aa = new AtomicIntegerArray(a);
48	>	assertEquals(a.length, aa.length());
49	>	for (int i = 0; i < a.length; i++)
50	>	assertEquals(a[i], aa.get(i));
51		}
52
53		/**
54		* get and set for out of bound indices throw IndexOutOfBoundsException
55		*/
56	<	public void testIndexing(){
57	<	AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
58	<	try {
59	<	ai.get(SIZE);
60	<	} catch(IndexOutOfBoundsException success){
61	<	}
62	<	try {
63	<	ai.get(-1);
64	<	} catch(IndexOutOfBoundsException success){
65	<	}
66	<	try {
67	<	ai.set(SIZE, 0);
68	<	} catch(IndexOutOfBoundsException success){
69	<	}
70	<	try {
71	<	ai.set(-1, 0);
72	<	} catch(IndexOutOfBoundsException success){
56	>	public void testIndexing() {
57	>	AtomicIntegerArray aa = new AtomicIntegerArray(SIZE);
58	>	for (int index : new int[] { -1, SIZE }) {
59	>	try {
60	>	aa.get(index);
61	>	shouldThrow();
62	>	} catch (IndexOutOfBoundsException success) {}
63	>	try {
64	>	aa.set(index, 1);
65	>	shouldThrow();
66	>	} catch (IndexOutOfBoundsException success) {}
67	>	try {
68	>	aa.lazySet(index, 1);
69	>	shouldThrow();
70	>	} catch (IndexOutOfBoundsException success) {}
71	>	try {
72	>	aa.compareAndSet(index, 1, 2);
73	>	shouldThrow();
74	>	} catch (IndexOutOfBoundsException success) {}
75	>	try {
76	>	aa.weakCompareAndSet(index, 1, 2);
77	>	shouldThrow();
78	>	} catch (IndexOutOfBoundsException success) {}
79	>	try {
80	>	aa.getAndAdd(index, 1);
81	>	shouldThrow();
82	>	} catch (IndexOutOfBoundsException success) {}
83	>	try {
84	>	aa.addAndGet(index, 1);
85	>	shouldThrow();
86	>	} catch (IndexOutOfBoundsException success) {}
87		}
88		}
89
#	Line 80 | Line 91 | public class AtomicIntegerArrayTest exte
91		* get returns the last value set at index
92		*/
93		public void testGetSet() {
94	<	AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
95	<	for (int i = 0; i < SIZE; ++i) {
96	<	ai.set(i, 1);
97	<	assertEquals(1,ai.get(i));
98	<	ai.set(i, 2);
99	<	assertEquals(2,ai.get(i));
100	<	ai.set(i, -3);
101	<	assertEquals(-3,ai.get(i));
94	>	AtomicIntegerArray aa = new AtomicIntegerArray(SIZE);
95	>	for (int i = 0; i < SIZE; i++) {
96	>	aa.set(i, 1);
97	>	assertEquals(1, aa.get(i));
98	>	aa.set(i, 2);
99	>	assertEquals(2, aa.get(i));
100	>	aa.set(i, -3);
101	>	assertEquals(-3, aa.get(i));
102	>	}
103	>	}
104	>
105	>	/**
106	>	* get returns the last value lazySet at index by same thread
107	>	*/
108	>	public void testGetLazySet() {
109	>	AtomicIntegerArray aa = new AtomicIntegerArray(SIZE);
110	>	for (int i = 0; i < SIZE; i++) {
111	>	aa.lazySet(i, 1);
112	>	assertEquals(1, aa.get(i));
113	>	aa.lazySet(i, 2);
114	>	assertEquals(2, aa.get(i));
115	>	aa.lazySet(i, -3);
116	>	assertEquals(-3, aa.get(i));
117		}
118		}
119
#	Line 95 | Line 121 | public class AtomicIntegerArrayTest exte
121		* compareAndSet succeeds in changing value if equal to expected else fails
122		*/
123		public void testCompareAndSet() {
124	<	AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
125	<	for (int i = 0; i < SIZE; ++i) {
126	<	ai.set(i, 1);
127	<	assertTrue(ai.compareAndSet(i, 1,2));
128	<	assertTrue(ai.compareAndSet(i, 2,-4));
129	<	assertEquals(-4,ai.get(i));
130	<	assertFalse(ai.compareAndSet(i, -5,7));
131	<	assertFalse((7 == ai.get(i)));
132	<	assertTrue(ai.compareAndSet(i, -4,7));
133	<	assertEquals(7,ai.get(i));
124	>	AtomicIntegerArray aa = new AtomicIntegerArray(SIZE);
125	>	for (int i = 0; i < SIZE; i++) {
126	>	aa.set(i, 1);
127	>	assertTrue(aa.compareAndSet(i, 1, 2));
128	>	assertTrue(aa.compareAndSet(i, 2, -4));
129	>	assertEquals(-4, aa.get(i));
130	>	assertFalse(aa.compareAndSet(i, -5, 7));
131	>	assertEquals(-4, aa.get(i));
132	>	assertTrue(aa.compareAndSet(i, -4, 7));
133	>	assertEquals(7, aa.get(i));
134		}
135		}
136
#	Line 112 | Line 138 | public class AtomicIntegerArrayTest exte
138		* compareAndSet in one thread enables another waiting for value
139		* to succeed
140		*/
141	<	public void testCompareAndSetInMultipleThreads() {
141	>	public void testCompareAndSetInMultipleThreads() throws Exception {
142		final AtomicIntegerArray a = new AtomicIntegerArray(1);
143		a.set(0, 1);
144	<	Thread t = new Thread(new Runnable() {
145	<	public void run() {
146	<	while(!a.compareAndSet(0, 2, 3)) Thread.yield();
147	<	}});
148	<	try {
149	<	t.start();
150	<	assertTrue(a.compareAndSet(0, 1, 2));
151	<	t.join(LONG_DELAY_MS);
152	<	assertFalse(t.isAlive());
153	<	assertEquals(a.get(0), 3);
154	<	}
129	<	catch(Exception e) {
130	<	unexpectedException();
131	<	}
144	>	Thread t = new Thread(new CheckedRunnable() {
145	>	public void realRun() {
146	>	while (!a.compareAndSet(0, 2, 3))
147	>	Thread.yield();
148	>	}});
149	>
150	>	t.start();
151	>	assertTrue(a.compareAndSet(0, 1, 2));
152	>	t.join(LONG_DELAY_MS);
153	>	assertFalse(t.isAlive());
154	>	assertEquals(3, a.get(0));
155		}
156
157		/**
158		* repeated weakCompareAndSet succeeds in changing value when equal
159	<	* to expected
159	>	* to expected
160		*/
161		public void testWeakCompareAndSet() {
162	<	AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
163	<	for (int i = 0; i < SIZE; ++i) {
164	<	ai.set(i, 1);
165	<	while(!ai.weakCompareAndSet(i, 1,2));
166	<	while(!ai.weakCompareAndSet(i, 2,-4));
167	<	assertEquals(-4,ai.get(i));
168	<	while(!ai.weakCompareAndSet(i, -4,7));
169	<	assertEquals(7,ai.get(i));
162	>	AtomicIntegerArray aa = new AtomicIntegerArray(SIZE);
163	>	for (int i = 0; i < SIZE; i++) {
164	>	aa.set(i, 1);
165	>	while (!aa.weakCompareAndSet(i, 1, 2));
166	>	while (!aa.weakCompareAndSet(i, 2, -4));
167	>	assertEquals(-4, aa.get(i));
168	>	while (!aa.weakCompareAndSet(i, -4, 7));
169	>	assertEquals(7, aa.get(i));
170		}
171		}
172
173		/**
174	<	*  getAndSet returns previous value and sets to given value at given index
174	>	* getAndSet returns previous value and sets to given value at given index
175		*/
176		public void testGetAndSet() {
177	<	AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
178	<	for (int i = 0; i < SIZE; ++i) {
179	<	ai.set(i, 1);
180	<	assertEquals(1,ai.getAndSet(i,0));
181	<	assertEquals(0,ai.getAndSet(i,-10));
182	<	assertEquals(-10,ai.getAndSet(i,1));
177	>	AtomicIntegerArray aa = new AtomicIntegerArray(SIZE);
178	>	for (int i = 0; i < SIZE; i++) {
179	>	aa.set(i, 1);
180	>	assertEquals(1, aa.getAndSet(i, 0));
181	>	assertEquals(0, aa.getAndSet(i, -10));
182	>	assertEquals(-10, aa.getAndSet(i, 1));
183		}
184		}
185
186		/**
187	<	*  getAndAdd returns previous value and adds given value
187	>	* getAndAdd returns previous value and adds given value
188		*/
189		public void testGetAndAdd() {
190	<	AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
191	<	for (int i = 0; i < SIZE; ++i) {
192	<	ai.set(i, 1);
193	<	assertEquals(1,ai.getAndAdd(i,2));
194	<	assertEquals(3,ai.get(i));
195	<	assertEquals(3,ai.getAndAdd(i,-4));
196	<	assertEquals(-1,ai.get(i));
190	>	AtomicIntegerArray aa = new AtomicIntegerArray(SIZE);
191	>	for (int i = 0; i < SIZE; i++) {
192	>	aa.set(i, 1);
193	>	assertEquals(1, aa.getAndAdd(i, 2));
194	>	assertEquals(3, aa.get(i));
195	>	assertEquals(3, aa.getAndAdd(i, -4));
196	>	assertEquals(-1, aa.get(i));
197		}
198		}
199
#	Line 178 | Line 201 | public class AtomicIntegerArrayTest exte
201		* getAndDecrement returns previous value and decrements
202		*/
203		public void testGetAndDecrement() {
204	<	AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
205	<	for (int i = 0; i < SIZE; ++i) {
206	<	ai.set(i, 1);
207	<	assertEquals(1,ai.getAndDecrement(i));
208	<	assertEquals(0,ai.getAndDecrement(i));
209	<	assertEquals(-1,ai.getAndDecrement(i));
204	>	AtomicIntegerArray aa = new AtomicIntegerArray(SIZE);
205	>	for (int i = 0; i < SIZE; i++) {
206	>	aa.set(i, 1);
207	>	assertEquals(1, aa.getAndDecrement(i));
208	>	assertEquals(0, aa.getAndDecrement(i));
209	>	assertEquals(-1, aa.getAndDecrement(i));
210		}
211		}
212
#	Line 191 | Line 214 | public class AtomicIntegerArrayTest exte
214		* getAndIncrement returns previous value and increments
215		*/
216		public void testGetAndIncrement() {
217	<	AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
218	<	for (int i = 0; i < SIZE; ++i) {
219	<	ai.set(i, 1);
220	<	assertEquals(1,ai.getAndIncrement(i));
221	<	assertEquals(2,ai.get(i));
222	<	ai.set(i,-2);
223	<	assertEquals(-2,ai.getAndIncrement(i));
224	<	assertEquals(-1,ai.getAndIncrement(i));
225	<	assertEquals(0,ai.getAndIncrement(i));
226	<	assertEquals(1,ai.get(i));
217	>	AtomicIntegerArray aa = new AtomicIntegerArray(SIZE);
218	>	for (int i = 0; i < SIZE; i++) {
219	>	aa.set(i, 1);
220	>	assertEquals(1, aa.getAndIncrement(i));
221	>	assertEquals(2, aa.get(i));
222	>	aa.set(i, -2);
223	>	assertEquals(-2, aa.getAndIncrement(i));
224	>	assertEquals(-1, aa.getAndIncrement(i));
225	>	assertEquals(0, aa.getAndIncrement(i));
226	>	assertEquals(1, aa.get(i));
227		}
228		}
229
230		/**
231	<	*  addAndGet adds given value to current, and returns current value
231	>	* addAndGet adds given value to current, and returns current value
232		*/
233		public void testAddAndGet() {
234	<	AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
235	<	for (int i = 0; i < SIZE; ++i) {
236	<	ai.set(i, 1);
237	<	assertEquals(3,ai.addAndGet(i,2));
238	<	assertEquals(3,ai.get(i));
239	<	assertEquals(-1,ai.addAndGet(i,-4));
240	<	assertEquals(-1,ai.get(i));
234	>	AtomicIntegerArray aa = new AtomicIntegerArray(SIZE);
235	>	for (int i = 0; i < SIZE; i++) {
236	>	aa.set(i, 1);
237	>	assertEquals(3, aa.addAndGet(i, 2));
238	>	assertEquals(3, aa.get(i));
239	>	assertEquals(-1, aa.addAndGet(i, -4));
240	>	assertEquals(-1, aa.get(i));
241		}
242		}
243
#	Line 222 | Line 245 | public class AtomicIntegerArrayTest exte
245		* decrementAndGet decrements and returns current value
246		*/
247		public void testDecrementAndGet() {
248	<	AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
249	<	for (int i = 0; i < SIZE; ++i) {
250	<	ai.set(i, 1);
251	<	assertEquals(0,ai.decrementAndGet(i));
252	<	assertEquals(-1,ai.decrementAndGet(i));
253	<	assertEquals(-2,ai.decrementAndGet(i));
254	<	assertEquals(-2,ai.get(i));
248	>	AtomicIntegerArray aa = new AtomicIntegerArray(SIZE);
249	>	for (int i = 0; i < SIZE; i++) {
250	>	aa.set(i, 1);
251	>	assertEquals(0, aa.decrementAndGet(i));
252	>	assertEquals(-1, aa.decrementAndGet(i));
253	>	assertEquals(-2, aa.decrementAndGet(i));
254	>	assertEquals(-2, aa.get(i));
255		}
256		}
257
258		/**
259	<	*  incrementAndGet increments and returns current value
259	>	* incrementAndGet increments and returns current value
260		*/
261		public void testIncrementAndGet() {
262	<	AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
263	<	for (int i = 0; i < SIZE; ++i) {
264	<	ai.set(i, 1);
265	<	assertEquals(2,ai.incrementAndGet(i));
266	<	assertEquals(2,ai.get(i));
267	<	ai.set(i, -2);
268	<	assertEquals(-1,ai.incrementAndGet(i));
269	<	assertEquals(0,ai.incrementAndGet(i));
270	<	assertEquals(1,ai.incrementAndGet(i));
271	<	assertEquals(1,ai.get(i));
262	>	AtomicIntegerArray aa = new AtomicIntegerArray(SIZE);
263	>	for (int i = 0; i < SIZE; i++) {
264	>	aa.set(i, 1);
265	>	assertEquals(2, aa.incrementAndGet(i));
266	>	assertEquals(2, aa.get(i));
267	>	aa.set(i, -2);
268	>	assertEquals(-1, aa.incrementAndGet(i));
269	>	assertEquals(0, aa.incrementAndGet(i));
270	>	assertEquals(1, aa.incrementAndGet(i));
271	>	assertEquals(1, aa.get(i));
272		}
273		}
274
275		static final int COUNTDOWN = 100000;
276	<
277	<	class Counter implements Runnable {
278	<	final AtomicIntegerArray ai;
276	>
277	>	class Counter extends CheckedRunnable {
278	>	final AtomicIntegerArray aa;
279		volatile int counts;
280	<	Counter(AtomicIntegerArray a) { ai = a; }
281	<	public void run() {
280	>	Counter(AtomicIntegerArray a) { aa = a; }
281	>	public void realRun() {
282		for (;;) {
283		boolean done = true;
284	<	for (int i = 0; i < ai.length(); ++i) {
285	<	int v = ai.get(i);
286	<	threadAssertTrue(v >= 0);
284	>	for (int i = 0; i < aa.length(); i++) {
285	>	int v = aa.get(i);
286	>	assertTrue(v >= 0);
287		if (v != 0) {
288		done = false;
289	<	if (ai.compareAndSet(i, v, v-1))
289	>	if (aa.compareAndSet(i, v, v-1))
290		++counts;
291		}
292		}
#	Line 277 | Line 300 | public class AtomicIntegerArrayTest exte
300		* Multiple threads using same array of counters successfully
301		* update a number of times equal to total count
302		*/
303	<	public void testCountingInMultipleThreads() {
304	<	try {
305	<	final AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
306	<	for (int i = 0; i < SIZE; ++i)
307	<	ai.set(i, COUNTDOWN);
308	<	Counter c1 = new Counter(ai);
309	<	Counter c2 = new Counter(ai);
310	<	Thread t1 = new Thread(c1);
311	<	Thread t2 = new Thread(c2);
312	<	t1.start();
313	<	t2.start();
314	<	t1.join();
315	<	t2.join();
293	<	assertEquals(c1.counts+c2.counts, SIZE * COUNTDOWN);
294	<	}
295	<	catch(InterruptedException ie) {
296	<	unexpectedException();
297	<	}
303	>	public void testCountingInMultipleThreads() throws InterruptedException {
304	>	final AtomicIntegerArray aa = new AtomicIntegerArray(SIZE);
305	>	for (int i = 0; i < SIZE; i++)
306	>	aa.set(i, COUNTDOWN);
307	>	Counter c1 = new Counter(aa);
308	>	Counter c2 = new Counter(aa);
309	>	Thread t1 = new Thread(c1);
310	>	Thread t2 = new Thread(c2);
311	>	t1.start();
312	>	t2.start();
313	>	t1.join();
314	>	t2.join();
315	>	assertEquals(c1.counts+c2.counts, SIZE * COUNTDOWN);
316		}
317
300	–
318		/**
319		* a deserialized serialized array holds same values
320		*/
321	<	public void testSerialization() {
322	<	AtomicIntegerArray l = new AtomicIntegerArray(SIZE);
323	<	for (int i = 0; i < SIZE; ++i)
324	<	l.set(i, -i);
325	<
326	<	try {
327	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
328	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
329	<	out.writeObject(l);
313	<	out.close();
314	<
315	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
316	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
317	<	AtomicIntegerArray r = (AtomicIntegerArray) in.readObject();
318	<	for (int i = 0; i < SIZE; ++i) {
319	<	assertEquals(l.get(i), r.get(i));
320	<	}
321	<	} catch(Exception e){
322	<	e.printStackTrace();
323	<	unexpectedException();
321	>	public void testSerialization() throws Exception {
322	>	AtomicIntegerArray x = new AtomicIntegerArray(SIZE);
323	>	for (int i = 0; i < SIZE; i++)
324	>	x.set(i, -i);
325	>	AtomicIntegerArray y = serialClone(x);
326	>	assertNotSame(x, y);
327	>	assertEquals(x.length(), y.length());
328	>	for (int i = 0; i < SIZE; i++) {
329	>	assertEquals(x.get(i), y.get(i));
330		}
331		}
332
333	+	/**
334	+	* toString returns current value.
335	+	*/
336	+	public void testToString() {
337	+	int[] a = { 17, 3, -42, 99, -7 };
338	+	AtomicIntegerArray aa = new AtomicIntegerArray(a);
339	+	assertEquals(Arrays.toString(a), aa.toString());
340	+	}
341	+
342		}

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