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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 1.37 by jsr166, Thu Sep 15 01:18:01 2016 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/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.*;
9	>	import java.util.Arrays;
10	>	import java.util.concurrent.atomic.AtomicIntegerArray;
11	>
12	>	import junit.framework.Test;
13	>	import junit.framework.TestSuite;
14
15		public class AtomicIntegerArrayTest extends JSR166TestCase {
16
17	<	public static void main (String[] args) {
18	<	junit.textui.TestRunner.run (suite());
17	>	public static void main(String[] args) {
18	>	main(suite(), args);
19		}
20		public static Test suite() {
21		return new TestSuite(AtomicIntegerArrayTest.class);
22		}
23
21	–
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)
30	<	assertEquals(0,ai.get(i));
28	>	AtomicIntegerArray aa = new AtomicIntegerArray(SIZE);
29	>	for (int i = 0; i < SIZE; i++)
30	>	assertEquals(0, aa.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	>	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 aa = new AtomicIntegerArray(a);
50	>	assertEquals(a.length, aa.length());
51	>	for (int i = 0; i < a.length; i++)
52	>	assertEquals(a[i], aa.get(i));
53	>	}
54	>
55	>	/**
56	>	* get and set for out of bound indices throw IndexOutOfBoundsException
57	>	*/
58	>	public void testIndexing() {
59	>	AtomicIntegerArray aa = new AtomicIntegerArray(SIZE);
60	>	for (int index : new int[] { -1, SIZE }) {
61	>	try {
62	>	aa.get(index);
63	>	shouldThrow();
64	>	} catch (IndexOutOfBoundsException success) {}
65	>	try {
66	>	aa.set(index, 1);
67	>	shouldThrow();
68	>	} catch (IndexOutOfBoundsException success) {}
69	>	try {
70	>	aa.lazySet(index, 1);
71	>	shouldThrow();
72	>	} catch (IndexOutOfBoundsException success) {}
73	>	try {
74	>	aa.compareAndSet(index, 1, 2);
75	>	shouldThrow();
76	>	} catch (IndexOutOfBoundsException success) {}
77	>	try {
78	>	aa.weakCompareAndSet(index, 1, 2);
79	>	shouldThrow();
80	>	} catch (IndexOutOfBoundsException success) {}
81	>	try {
82	>	aa.getAndAdd(index, 1);
83	>	shouldThrow();
84	>	} catch (IndexOutOfBoundsException success) {}
85	>	try {
86	>	aa.addAndGet(index, 1);
87	>	shouldThrow();
88	>	} catch (IndexOutOfBoundsException success) {}
89	>	}
90	>	}
91	>
92	>	/**
93	>	* get returns the last value set at index
94		*/
95		public void testGetSet() {
96	<	AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
97	<	for (int i = 0; i < SIZE; ++i) {
98	<	ai.set(i, 1);
99	<	assertEquals(1,ai.get(i));
100	<	ai.set(i, 2);
101	<	assertEquals(2,ai.get(i));
102	<	ai.set(i, -3);
103	<	assertEquals(-3,ai.get(i));
96	>	AtomicIntegerArray aa = new AtomicIntegerArray(SIZE);
97	>	for (int i = 0; i < SIZE; i++) {
98	>	aa.set(i, 1);
99	>	assertEquals(1, aa.get(i));
100	>	aa.set(i, 2);
101	>	assertEquals(2, aa.get(i));
102	>	aa.set(i, -3);
103	>	assertEquals(-3, aa.get(i));
104		}
105		}
106
107		/**
108	<	*
108	>	* get returns the last value lazySet at index by same thread
109	>	*/
110	>	public void testGetLazySet() {
111	>	AtomicIntegerArray aa = new AtomicIntegerArray(SIZE);
112	>	for (int i = 0; i < SIZE; i++) {
113	>	aa.lazySet(i, 1);
114	>	assertEquals(1, aa.get(i));
115	>	aa.lazySet(i, 2);
116	>	assertEquals(2, aa.get(i));
117	>	aa.lazySet(i, -3);
118	>	assertEquals(-3, aa.get(i));
119	>	}
120	>	}
121	>
122	>	/**
123	>	* compareAndSet succeeds in changing value if equal to expected else fails
124		*/
125		public void testCompareAndSet() {
126	<	AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
127	<	for (int i = 0; i < SIZE; ++i) {
128	<	ai.set(i, 1);
129	<	assertTrue(ai.compareAndSet(i, 1,2));
130	<	assertTrue(ai.compareAndSet(i, 2,-4));
131	<	assertEquals(-4,ai.get(i));
132	<	assertFalse(ai.compareAndSet(i, -5,7));
133	<	assertFalse((7 == ai.get(i)));
134	<	assertTrue(ai.compareAndSet(i, -4,7));
135	<	assertEquals(7,ai.get(i));
126	>	AtomicIntegerArray aa = new AtomicIntegerArray(SIZE);
127	>	for (int i = 0; i < SIZE; i++) {
128	>	aa.set(i, 1);
129	>	assertTrue(aa.compareAndSet(i, 1, 2));
130	>	assertTrue(aa.compareAndSet(i, 2, -4));
131	>	assertEquals(-4, aa.get(i));
132	>	assertFalse(aa.compareAndSet(i, -5, 7));
133	>	assertEquals(-4, aa.get(i));
134	>	assertTrue(aa.compareAndSet(i, -4, 7));
135	>	assertEquals(7, aa.get(i));
136		}
137		}
138
139		/**
140	<	*
140	>	* compareAndSet in one thread enables another waiting for value
141	>	* to succeed
142	>	*/
143	>	public void testCompareAndSetInMultipleThreads() throws Exception {
144	>	final AtomicIntegerArray a = new AtomicIntegerArray(1);
145	>	a.set(0, 1);
146	>	Thread t = new Thread(new CheckedRunnable() {
147	>	public void realRun() {
148	>	while (!a.compareAndSet(0, 2, 3))
149	>	Thread.yield();
150	>	}});
151	>
152	>	t.start();
153	>	assertTrue(a.compareAndSet(0, 1, 2));
154	>	t.join(LONG_DELAY_MS);
155	>	assertFalse(t.isAlive());
156	>	assertEquals(3, a.get(0));
157	>	}
158	>
159	>	/**
160	>	* repeated weakCompareAndSet succeeds in changing value when equal
161	>	* to expected
162		*/
163		public void testWeakCompareAndSet() {
164	<	AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
165	<	for (int i = 0; i < SIZE; ++i) {
166	<	ai.set(i, 1);
167	<	while(!ai.weakCompareAndSet(i, 1,2));
168	<	while(!ai.weakCompareAndSet(i, 2,-4));
169	<	assertEquals(-4,ai.get(i));
170	<	while(!ai.weakCompareAndSet(i, -4,7));
171	<	assertEquals(7,ai.get(i));
164	>	AtomicIntegerArray aa = new AtomicIntegerArray(SIZE);
165	>	for (int i = 0; i < SIZE; i++) {
166	>	aa.set(i, 1);
167	>	do {} while (!aa.weakCompareAndSet(i, 1, 2));
168	>	do {} while (!aa.weakCompareAndSet(i, 2, -4));
169	>	assertEquals(-4, aa.get(i));
170	>	do {} while (!aa.weakCompareAndSet(i, -4, 7));
171	>	assertEquals(7, aa.get(i));
172		}
173		}
174
175		/**
176	<	*
176	>	* getAndSet returns previous value and sets to given value at given index
177		*/
178		public void testGetAndSet() {
179	<	AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
180	<	for (int i = 0; i < SIZE; ++i) {
181	<	ai.set(i, 1);
182	<	assertEquals(1,ai.getAndSet(i,0));
183	<	assertEquals(0,ai.getAndSet(i,-10));
184	<	assertEquals(-10,ai.getAndSet(i,1));
179	>	AtomicIntegerArray aa = new AtomicIntegerArray(SIZE);
180	>	for (int i = 0; i < SIZE; i++) {
181	>	aa.set(i, 1);
182	>	assertEquals(1, aa.getAndSet(i, 0));
183	>	assertEquals(0, aa.getAndSet(i, -10));
184	>	assertEquals(-10, aa.getAndSet(i, 1));
185		}
186		}
187
188		/**
189	<	*
189	>	* getAndAdd returns previous value and adds given value
190		*/
191		public void testGetAndAdd() {
192	<	AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
193	<	for (int i = 0; i < SIZE; ++i) {
194	<	ai.set(i, 1);
195	<	assertEquals(1,ai.getAndAdd(i,2));
196	<	assertEquals(3,ai.get(i));
197	<	assertEquals(3,ai.getAndAdd(i,-4));
198	<	assertEquals(-1,ai.get(i));
192	>	AtomicIntegerArray aa = new AtomicIntegerArray(SIZE);
193	>	for (int i = 0; i < SIZE; i++) {
194	>	aa.set(i, 1);
195	>	assertEquals(1, aa.getAndAdd(i, 2));
196	>	assertEquals(3, aa.get(i));
197	>	assertEquals(3, aa.getAndAdd(i, -4));
198	>	assertEquals(-1, aa.get(i));
199		}
200		}
201
202		/**
203	<	*
203	>	* getAndDecrement returns previous value and decrements
204		*/
205		public void testGetAndDecrement() {
206	<	AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
207	<	for (int i = 0; i < SIZE; ++i) {
208	<	ai.set(i, 1);
209	<	assertEquals(1,ai.getAndDecrement(i));
210	<	assertEquals(0,ai.getAndDecrement(i));
211	<	assertEquals(-1,ai.getAndDecrement(i));
206	>	AtomicIntegerArray aa = new AtomicIntegerArray(SIZE);
207	>	for (int i = 0; i < SIZE; i++) {
208	>	aa.set(i, 1);
209	>	assertEquals(1, aa.getAndDecrement(i));
210	>	assertEquals(0, aa.getAndDecrement(i));
211	>	assertEquals(-1, aa.getAndDecrement(i));
212		}
213		}
214
215		/**
216	<	*
216	>	* getAndIncrement returns previous value and increments
217		*/
218		public void testGetAndIncrement() {
219	<	AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
220	<	for (int i = 0; i < SIZE; ++i) {
221	<	ai.set(i, 1);
222	<	assertEquals(1,ai.getAndIncrement(i));
223	<	assertEquals(2,ai.get(i));
224	<	ai.set(i,-2);
225	<	assertEquals(-2,ai.getAndIncrement(i));
226	<	assertEquals(-1,ai.getAndIncrement(i));
227	<	assertEquals(0,ai.getAndIncrement(i));
228	<	assertEquals(1,ai.get(i));
219	>	AtomicIntegerArray aa = new AtomicIntegerArray(SIZE);
220	>	for (int i = 0; i < SIZE; i++) {
221	>	aa.set(i, 1);
222	>	assertEquals(1, aa.getAndIncrement(i));
223	>	assertEquals(2, aa.get(i));
224	>	aa.set(i, -2);
225	>	assertEquals(-2, aa.getAndIncrement(i));
226	>	assertEquals(-1, aa.getAndIncrement(i));
227	>	assertEquals(0, aa.getAndIncrement(i));
228	>	assertEquals(1, aa.get(i));
229		}
230		}
231
232		/**
233	<	*
233	>	* addAndGet adds given value to current, and returns current value
234		*/
235		public void testAddAndGet() {
236	<	AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
237	<	for (int i = 0; i < SIZE; ++i) {
238	<	ai.set(i, 1);
239	<	assertEquals(3,ai.addAndGet(i,2));
240	<	assertEquals(3,ai.get(i));
241	<	assertEquals(-1,ai.addAndGet(i,-4));
242	<	assertEquals(-1,ai.get(i));
236	>	AtomicIntegerArray aa = new AtomicIntegerArray(SIZE);
237	>	for (int i = 0; i < SIZE; i++) {
238	>	aa.set(i, 1);
239	>	assertEquals(3, aa.addAndGet(i, 2));
240	>	assertEquals(3, aa.get(i));
241	>	assertEquals(-1, aa.addAndGet(i, -4));
242	>	assertEquals(-1, aa.get(i));
243		}
244		}
245
246		/**
247	<	*
247	>	* decrementAndGet decrements and returns current value
248		*/
249		public void testDecrementAndGet() {
250	<	AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
251	<	for (int i = 0; i < SIZE; ++i) {
252	<	ai.set(i, 1);
253	<	assertEquals(0,ai.decrementAndGet(i));
254	<	assertEquals(-1,ai.decrementAndGet(i));
255	<	assertEquals(-2,ai.decrementAndGet(i));
256	<	assertEquals(-2,ai.get(i));
250	>	AtomicIntegerArray aa = new AtomicIntegerArray(SIZE);
251	>	for (int i = 0; i < SIZE; i++) {
252	>	aa.set(i, 1);
253	>	assertEquals(0, aa.decrementAndGet(i));
254	>	assertEquals(-1, aa.decrementAndGet(i));
255	>	assertEquals(-2, aa.decrementAndGet(i));
256	>	assertEquals(-2, aa.get(i));
257		}
258		}
259
260		/**
261	<	*
261	>	* incrementAndGet increments and returns current value
262		*/
263		public void testIncrementAndGet() {
264	<	AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
265	<	for (int i = 0; i < SIZE; ++i) {
266	<	ai.set(i, 1);
267	<	assertEquals(2,ai.incrementAndGet(i));
268	<	assertEquals(2,ai.get(i));
269	<	ai.set(i, -2);
270	<	assertEquals(-1,ai.incrementAndGet(i));
271	<	assertEquals(0,ai.incrementAndGet(i));
272	<	assertEquals(1,ai.incrementAndGet(i));
273	<	assertEquals(1,ai.get(i));
264	>	AtomicIntegerArray aa = new AtomicIntegerArray(SIZE);
265	>	for (int i = 0; i < SIZE; i++) {
266	>	aa.set(i, 1);
267	>	assertEquals(2, aa.incrementAndGet(i));
268	>	assertEquals(2, aa.get(i));
269	>	aa.set(i, -2);
270	>	assertEquals(-1, aa.incrementAndGet(i));
271	>	assertEquals(0, aa.incrementAndGet(i));
272	>	assertEquals(1, aa.incrementAndGet(i));
273	>	assertEquals(1, aa.get(i));
274		}
275		}
276
277	<	static final int COUNTDOWN = 100000;
278	<
279	<	class Counter implements Runnable {
280	<	final AtomicIntegerArray ai;
281	<	volatile int counts;
185	<	Counter(AtomicIntegerArray a) { ai = a; }
186	<	public void run() {
277	>	class Counter extends CheckedRunnable {
278	>	final AtomicIntegerArray aa;
279	>	int decs;
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))
290	<	++counts;
289	>	if (aa.compareAndSet(i, v, v - 1))
290	>	decs++;
291		}
292		}
293		if (done)
#	Line 202 | Line 297 | public class AtomicIntegerArrayTest exte
297		}
298
299		/**
300	<	*
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();
219	<	t2.join();
220	<	assertEquals(c1.counts+c2.counts, SIZE * COUNTDOWN);
221	<	}
222	<	catch(InterruptedException ie) {
223	<	unexpectedException();
224	<	}
303	>	public void testCountingInMultipleThreads() throws InterruptedException {
304	>	final AtomicIntegerArray aa = new AtomicIntegerArray(SIZE);
305	>	int countdown = 10000;
306	>	for (int i = 0; i < SIZE; i++)
307	>	aa.set(i, countdown);
308	>	Counter c1 = new Counter(aa);
309	>	Counter c2 = new Counter(aa);
310	>	Thread t1 = newStartedThread(c1);
311	>	Thread t2 = newStartedThread(c2);
312	>	t1.join();
313	>	t2.join();
314	>	assertEquals(c1.decs + c2.decs, SIZE * countdown);
315		}
316
227	–
317		/**
318	<	*
318	>	* a deserialized serialized array holds same values
319		*/
320	<	public void testSerialization() {
321	<	AtomicIntegerArray l = new AtomicIntegerArray(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);
240	<	out.close();
241	<
242	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
243	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
244	<	AtomicIntegerArray r = (AtomicIntegerArray) in.readObject();
245	<	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();
320	>	public void testSerialization() throws Exception {
321	>	AtomicIntegerArray x = new AtomicIntegerArray(SIZE);
322	>	for (int i = 0; i < SIZE; i++)
323	>	x.set(i, -i);
324	>	AtomicIntegerArray y = serialClone(x);
325	>	assertNotSame(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	+	int[] a = { 17, 3, -42, 99, -7 };
337	+	AtomicIntegerArray aa = new AtomicIntegerArray(a);
338	+	assertEquals(Arrays.toString(a), aa.toString());
339	+	}
340	+
341		}

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