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Comparing jsr166/src/test/tck/AtomicLongArrayTest.java (file contents):
Revision 1.8 by dl, Sat Jan 10 01:41:59 2004 UTC vs.
Revision 1.22 by jsr166, Fri Jun 10 19:45:01 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.*;
12	<	import java.util.*;
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 22 | Line 21 | public class AtomicLongArrayTest extends
21		/**
22		* constructor creates array of given size with all elements zero
23		*/
24	<	public void testConstructor(){
24	>	public void testConstructor() {
25		AtomicLongArray ai = new AtomicLongArray(SIZE);
26	<	for (int i = 0; i < SIZE; ++i)
26	>	for (int i = 0; i < SIZE; ++i)
27		assertEquals(0,ai.get(i));
28		}
29
#	Line 35 | Line 34 | public class AtomicLongArrayTest extends
34		try {
35		long[] a = null;
36		AtomicLongArray ai = new AtomicLongArray(a);
37	<	} catch (NullPointerException success) {
38	<	} catch (Exception ex) {
40	<	unexpectedException();
41	<	}
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};
45	>	long[] a = { 17L, 3L, -42L, 99L, -7L };
46		AtomicLongArray ai = new AtomicLongArray(a);
47		assertEquals(a.length, ai.length());
48	<	for (int i = 0; i < a.length; ++i)
48	>	for (int i = 0; i < a.length; ++i)
49		assertEquals(a[i], ai.get(i));
50		}
51
52		/**
53		* get and set for out of bound indices throw IndexOutOfBoundsException
54		*/
55	<	public void testIndexing(){
55	>	public void testIndexing() {
56		AtomicLongArray ai = new AtomicLongArray(SIZE);
57		try {
58		ai.get(SIZE);
59	<	} catch(IndexOutOfBoundsException success){
59	>	shouldThrow();
60	>	} catch (IndexOutOfBoundsException success) {
61		}
62		try {
63		ai.get(-1);
64	<	} catch(IndexOutOfBoundsException success){
64	>	shouldThrow();
65	>	} catch (IndexOutOfBoundsException success) {
66		}
67		try {
68		ai.set(SIZE, 0);
69	<	} catch(IndexOutOfBoundsException success){
69	>	shouldThrow();
70	>	} catch (IndexOutOfBoundsException success) {
71		}
72		try {
73		ai.set(-1, 0);
74	<	} catch(IndexOutOfBoundsException success){
74	>	shouldThrow();
75	>	} catch (IndexOutOfBoundsException success) {
76		}
77		}
78
79		/**
80		* get returns the last value set at index
81		*/
82	<	public void testGetSet(){
83	<	AtomicLongArray ai = new AtomicLongArray(SIZE);
82	>	public void testGetSet() {
83	>	AtomicLongArray ai = new AtomicLongArray(SIZE);
84		for (int i = 0; i < SIZE; ++i) {
85		ai.set(i, 1);
86		assertEquals(1,ai.get(i));
#	Line 91 | Line 92 | public class AtomicLongArrayTest extends
92		}
93
94		/**
95	+	* get returns the last value lazySet at index by same thread
96	+	*/
97	+	public void testGetLazySet() {
98	+	AtomicLongArray ai = new AtomicLongArray(SIZE);
99	+	for (int i = 0; i < SIZE; ++i) {
100	+	ai.lazySet(i, 1);
101	+	assertEquals(1,ai.get(i));
102	+	ai.lazySet(i, 2);
103	+	assertEquals(2,ai.get(i));
104	+	ai.lazySet(i, -3);
105	+	assertEquals(-3,ai.get(i));
106	+	}
107	+	}
108	+
109	+	/**
110		* compareAndSet succeeds in changing value if equal to expected else fails
111		*/
112	<	public void testCompareAndSet(){
113	<	AtomicLongArray ai = new AtomicLongArray(SIZE);
112	>	public void testCompareAndSet() {
113	>	AtomicLongArray ai = new AtomicLongArray(SIZE);
114		for (int i = 0; i < SIZE; ++i) {
115		ai.set(i, 1);
116		assertTrue(ai.compareAndSet(i, 1,2));
117		assertTrue(ai.compareAndSet(i, 2,-4));
118		assertEquals(-4,ai.get(i));
119		assertFalse(ai.compareAndSet(i, -5,7));
120	<	assertFalse((7 == ai.get(i)));
120	>	assertEquals(-4,ai.get(i));
121		assertTrue(ai.compareAndSet(i, -4,7));
122		assertEquals(7,ai.get(i));
123		}
#	Line 111 | Line 127 | public class AtomicLongArrayTest extends
127		* compareAndSet in one thread enables another waiting for value
128		* to succeed
129		*/
130	<	public void testCompareAndSetInMultipleThreads() {
130	>	public void testCompareAndSetInMultipleThreads() throws InterruptedException {
131		final AtomicLongArray a = new AtomicLongArray(1);
132		a.set(0, 1);
133	<	Thread t = new Thread(new Runnable() {
134	<	public void run() {
135	<	while(!a.compareAndSet(0, 2, 3)) Thread.yield();
136	<	}});
137	<	try {
138	<	t.start();
139	<	assertTrue(a.compareAndSet(0, 1, 2));
140	<	t.join(LONG_DELAY_MS);
141	<	assertFalse(t.isAlive());
142	<	assertEquals(a.get(0), 3);
143	<	}
128	<	catch(Exception e) {
129	<	unexpectedException();
130	<	}
133	>	Thread t = new Thread(new CheckedRunnable() {
134	>	public void realRun() {
135	>	while (!a.compareAndSet(0, 2, 3))
136	>	Thread.yield();
137	>	}});
138	>
139	>	t.start();
140	>	assertTrue(a.compareAndSet(0, 1, 2));
141	>	t.join(LONG_DELAY_MS);
142	>	assertFalse(t.isAlive());
143	>	assertEquals(a.get(0), 3);
144		}
145
146		/**
147		* repeated weakCompareAndSet succeeds in changing value when equal
148	<	* to expected
148	>	* to expected
149		*/
150	<	public void testWeakCompareAndSet(){
151	<	AtomicLongArray ai = new AtomicLongArray(SIZE);
150	>	public void testWeakCompareAndSet() {
151	>	AtomicLongArray ai = new AtomicLongArray(SIZE);
152		for (int i = 0; i < SIZE; ++i) {
153		ai.set(i, 1);
154	<	while(!ai.weakCompareAndSet(i, 1,2));
155	<	while(!ai.weakCompareAndSet(i, 2,-4));
154	>	while (!ai.weakCompareAndSet(i, 1,2));
155	>	while (!ai.weakCompareAndSet(i, 2,-4));
156		assertEquals(-4,ai.get(i));
157	<	while(!ai.weakCompareAndSet(i, -4,7));
157	>	while (!ai.weakCompareAndSet(i, -4,7));
158		assertEquals(7,ai.get(i));
159		}
160		}
161
162		/**
163	<	*  getAndSet returns previous value and sets to given value at given index
163	>	* getAndSet returns previous value and sets to given value at given index
164		*/
165	<	public void testGetAndSet(){
166	<	AtomicLongArray ai = new AtomicLongArray(SIZE);
165	>	public void testGetAndSet() {
166	>	AtomicLongArray ai = new AtomicLongArray(SIZE);
167		for (int i = 0; i < SIZE; ++i) {
168		ai.set(i, 1);
169		assertEquals(1,ai.getAndSet(i,0));
#	Line 160 | Line 173 | public class AtomicLongArrayTest extends
173		}
174
175		/**
176	<	*  getAndAdd returns previous value and adds given value
176	>	* getAndAdd returns previous value and adds given value
177		*/
178	<	public void testGetAndAdd(){
179	<	AtomicLongArray ai = new AtomicLongArray(SIZE);
178	>	public void testGetAndAdd() {
179	>	AtomicLongArray ai = new AtomicLongArray(SIZE);
180		for (int i = 0; i < SIZE; ++i) {
181		ai.set(i, 1);
182		assertEquals(1,ai.getAndAdd(i,2));
#	Line 176 | Line 189 | public class AtomicLongArrayTest extends
189		/**
190		* getAndDecrement returns previous value and decrements
191		*/
192	<	public void testGetAndDecrement(){
193	<	AtomicLongArray ai = new AtomicLongArray(SIZE);
192	>	public void testGetAndDecrement() {
193	>	AtomicLongArray ai = new AtomicLongArray(SIZE);
194		for (int i = 0; i < SIZE; ++i) {
195		ai.set(i, 1);
196		assertEquals(1,ai.getAndDecrement(i));
#	Line 189 | Line 202 | public class AtomicLongArrayTest extends
202		/**
203		* getAndIncrement returns previous value and increments
204		*/
205	<	public void testGetAndIncrement(){
206	<	AtomicLongArray ai = new AtomicLongArray(SIZE);
205	>	public void testGetAndIncrement() {
206	>	AtomicLongArray ai = new AtomicLongArray(SIZE);
207		for (int i = 0; i < SIZE; ++i) {
208		ai.set(i, 1);
209		assertEquals(1,ai.getAndIncrement(i));
#	Line 204 | Line 217 | public class AtomicLongArrayTest extends
217		}
218
219		/**
220	<	*  addAndGet adds given value to current, and returns current value
220	>	* addAndGet adds given value to current, and returns current value
221		*/
222		public void testAddAndGet() {
223	<	AtomicLongArray ai = new AtomicLongArray(SIZE);
223	>	AtomicLongArray ai = new AtomicLongArray(SIZE);
224		for (int i = 0; i < SIZE; ++i) {
225		ai.set(i, 1);
226		assertEquals(3,ai.addAndGet(i,2));
#	Line 220 | Line 233 | public class AtomicLongArrayTest extends
233		/**
234		* decrementAndGet decrements and returns current value
235		*/
236	<	public void testDecrementAndGet(){
237	<	AtomicLongArray ai = new AtomicLongArray(SIZE);
236	>	public void testDecrementAndGet() {
237	>	AtomicLongArray ai = new AtomicLongArray(SIZE);
238		for (int i = 0; i < SIZE; ++i) {
239		ai.set(i, 1);
240		assertEquals(0,ai.decrementAndGet(i));
#	Line 235 | Line 248 | public class AtomicLongArrayTest extends
248		* incrementAndGet increments and returns current value
249		*/
250		public void testIncrementAndGet() {
251	<	AtomicLongArray ai = new AtomicLongArray(SIZE);
251	>	AtomicLongArray ai = new AtomicLongArray(SIZE);
252		for (int i = 0; i < SIZE; ++i) {
253		ai.set(i, 1);
254		assertEquals(2,ai.incrementAndGet(i));
#	Line 249 | Line 262 | public class AtomicLongArrayTest extends
262		}
263
264		static final long COUNTDOWN = 100000;
265	<
266	<	class Counter implements Runnable {
265	>
266	>	class Counter extends CheckedRunnable {
267		final AtomicLongArray ai;
268		volatile long counts;
269		Counter(AtomicLongArray a) { ai = a; }
270	<	public void run() {
270	>	public void realRun() {
271		for (;;) {
272		boolean done = true;
273		for (int i = 0; i < ai.length(); ++i) {
274		long v = ai.get(i);
275	<	threadAssertTrue(v >= 0);
275	>	assertTrue(v >= 0);
276		if (v != 0) {
277		done = false;
278		if (ai.compareAndSet(i, v, v-1))
#	Line 276 | Line 289 | public class AtomicLongArrayTest extends
289		* Multiple threads using same array of counters successfully
290		* update a number of times equal to total count
291		*/
292	<	public void testCountingInMultipleThreads() {
293	<	try {
294	<	final AtomicLongArray ai = new AtomicLongArray(SIZE);
295	<	for (int i = 0; i < SIZE; ++i)
296	<	ai.set(i, COUNTDOWN);
297	<	Counter c1 = new Counter(ai);
298	<	Counter c2 = new Counter(ai);
299	<	Thread t1 = new Thread(c1);
300	<	Thread t2 = new Thread(c2);
301	<	t1.start();
302	<	t2.start();
303	<	t1.join();
304	<	t2.join();
292	<	assertEquals(c1.counts+c2.counts, SIZE * COUNTDOWN);
293	<	}
294	<	catch(InterruptedException ie) {
295	<	unexpectedException();
296	<	}
292	>	public void testCountingInMultipleThreads() throws InterruptedException {
293	>	final AtomicLongArray ai = new AtomicLongArray(SIZE);
294	>	for (int i = 0; i < SIZE; ++i)
295	>	ai.set(i, COUNTDOWN);
296	>	Counter c1 = new Counter(ai);
297	>	Counter c2 = new Counter(ai);
298	>	Thread t1 = new Thread(c1);
299	>	Thread t2 = new Thread(c2);
300	>	t1.start();
301	>	t2.start();
302	>	t1.join();
303	>	t2.join();
304	>	assertEquals(c1.counts+c2.counts, SIZE * COUNTDOWN);
305		}
306
307		/**
308		* a deserialized serialized array holds same values
309		*/
310	<	public void testSerialization() {
311	<	AtomicLongArray l = new AtomicLongArray(SIZE);
312	<	for (int i = 0; i < SIZE; ++i)
313	<	l.set(i, -i);
314	<
315	<	try {
316	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
317	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
318	<	out.writeObject(l);
311	<	out.close();
312	<
313	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
314	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
315	<	AtomicLongArray r = (AtomicLongArray) in.readObject();
316	<	for (int i = 0; i < SIZE; ++i) {
317	<	assertEquals(l.get(i), r.get(i));
318	<	}
319	<	} catch(Exception e){
320	<	unexpectedException();
310	>	public void testSerialization() throws Exception {
311	>	AtomicLongArray x = new AtomicLongArray(SIZE);
312	>	for (int i = 0; i < SIZE; ++i)
313	>	x.set(i, -i);
314	>	AtomicLongArray y = serialClone(x);
315	>	assertTrue(x != y);
316	>	assertEquals(x.length(), y.length());
317	>	for (int i = 0; i < SIZE; ++i) {
318	>	assertEquals(x.get(i), y.get(i));
319		}
320		}
321
322		/**
323		* toString returns current value.
324	<	*/
324	>	*/
325		public void testToString() {
326	<	long[] a = { 17, 3, -42, 99, -7};
326	>	long[] a = { 17, 3, -42, 99, -7 };
327		AtomicLongArray ai = new AtomicLongArray(a);
328		assertEquals(Arrays.toString(a), ai.toString());
329		}
330
333	–
331		}

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