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

Comparing jsr166/src/test/tck/AtomicLongArrayTest.java (file contents):
Revision 1.5 by dl, Thu Sep 25 11:02:41 2003 UTC vs.
Revision 1.18 by jsr166, Sat Oct 9 19:30:34 2010 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) {
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(AtomicLongArrayTest.class);
#	Line 20 | Line 22 | public class AtomicLongArrayTest extends
22		/**
23		* constructor creates array of given size with all elements zero
24		*/
25	<	public void testConstructor(){
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		/**
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	+	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	+	long[] a = { 17L, 3L, -42L, 99L, -7L};
47	+	AtomicLongArray ai = new AtomicLongArray(a);
48	+	assertEquals(a.length, ai.length());
49	+	for (int i = 0; i < a.length; ++i)
50	+	assertEquals(a[i], ai.get(i));
51	+	}
52	+
53	+	/**
54		* get and set for out of bound indices throw IndexOutOfBoundsException
55		*/
56	<	public void testIndexing(){
56	>	public void testIndexing() {
57		AtomicLongArray ai = new AtomicLongArray(SIZE);
58		try {
59		ai.get(SIZE);
60	<	} catch(IndexOutOfBoundsException success){
60	>	shouldThrow();
61	>	} catch (IndexOutOfBoundsException success) {
62		}
63		try {
64		ai.get(-1);
65	<	} catch(IndexOutOfBoundsException success){
65	>	shouldThrow();
66	>	} catch (IndexOutOfBoundsException success) {
67		}
68		try {
69		ai.set(SIZE, 0);
70	<	} catch(IndexOutOfBoundsException success){
70	>	shouldThrow();
71	>	} catch (IndexOutOfBoundsException success) {
72		}
73		try {
74		ai.set(-1, 0);
75	<	} catch(IndexOutOfBoundsException success){
75	>	shouldThrow();
76	>	} catch (IndexOutOfBoundsException success) {
77		}
78		}
79
80		/**
81		* get returns the last value set at index
82		*/
83	<	public void testGetSet(){
84	<	AtomicLongArray ai = new AtomicLongArray(SIZE);
83	>	public void testGetSet() {
84	>	AtomicLongArray ai = new AtomicLongArray(SIZE);
85		for (int i = 0; i < SIZE; ++i) {
86		ai.set(i, 1);
87		assertEquals(1,ai.get(i));
#	Line 65 | Line 93 | public class AtomicLongArrayTest extends
93		}
94
95		/**
96	+	* get returns the last value lazySet at index by same thread
97	+	*/
98	+	public void testGetLazySet() {
99	+	AtomicLongArray ai = new AtomicLongArray(SIZE);
100	+	for (int i = 0; i < SIZE; ++i) {
101	+	ai.lazySet(i, 1);
102	+	assertEquals(1,ai.get(i));
103	+	ai.lazySet(i, 2);
104	+	assertEquals(2,ai.get(i));
105	+	ai.lazySet(i, -3);
106	+	assertEquals(-3,ai.get(i));
107	+	}
108	+	}
109	+
110	+	/**
111		* compareAndSet succeeds in changing value if equal to expected else fails
112		*/
113	<	public void testCompareAndSet(){
114	<	AtomicLongArray ai = new AtomicLongArray(SIZE);
113	>	public void testCompareAndSet() {
114	>	AtomicLongArray ai = new AtomicLongArray(SIZE);
115		for (int i = 0; i < SIZE; ++i) {
116		ai.set(i, 1);
117		assertTrue(ai.compareAndSet(i, 1,2));
118		assertTrue(ai.compareAndSet(i, 2,-4));
119		assertEquals(-4,ai.get(i));
120		assertFalse(ai.compareAndSet(i, -5,7));
121	<	assertFalse((7 == ai.get(i)));
121	>	assertEquals(-4,ai.get(i));
122		assertTrue(ai.compareAndSet(i, -4,7));
123		assertEquals(7,ai.get(i));
124		}
#	Line 85 | Line 128 | public class AtomicLongArrayTest extends
128		* compareAndSet in one thread enables another waiting for value
129		* to succeed
130		*/
131	<	public void testCompareAndSetInMultipleThreads() {
131	>	public void testCompareAndSetInMultipleThreads() throws InterruptedException {
132		final AtomicLongArray a = new AtomicLongArray(1);
133		a.set(0, 1);
134	<	Thread t = new Thread(new Runnable() {
135	<	public void run() {
136	<	while(!a.compareAndSet(0, 2, 3)) Thread.yield();
137	<	}});
138	<	try {
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	<	}
102	<	catch(Exception e) {
103	<	unexpectedException();
104	<	}
134	>	Thread t = new Thread(new CheckedRunnable() {
135	>	public void realRun() {
136	>	while (!a.compareAndSet(0, 2, 3))
137	>	Thread.yield();
138	>	}});
139	>
140	>	t.start();
141	>	assertTrue(a.compareAndSet(0, 1, 2));
142	>	t.join(LONG_DELAY_MS);
143	>	assertFalse(t.isAlive());
144	>	assertEquals(a.get(0), 3);
145		}
146
147		/**
148		* repeated weakCompareAndSet succeeds in changing value when equal
149	<	* to expected
149	>	* to expected
150		*/
151	<	public void testWeakCompareAndSet(){
152	<	AtomicLongArray ai = new AtomicLongArray(SIZE);
151	>	public void testWeakCompareAndSet() {
152	>	AtomicLongArray ai = new AtomicLongArray(SIZE);
153		for (int i = 0; i < SIZE; ++i) {
154		ai.set(i, 1);
155	<	while(!ai.weakCompareAndSet(i, 1,2));
156	<	while(!ai.weakCompareAndSet(i, 2,-4));
155	>	while (!ai.weakCompareAndSet(i, 1,2));
156	>	while (!ai.weakCompareAndSet(i, 2,-4));
157		assertEquals(-4,ai.get(i));
158	<	while(!ai.weakCompareAndSet(i, -4,7));
158	>	while (!ai.weakCompareAndSet(i, -4,7));
159		assertEquals(7,ai.get(i));
160		}
161		}
162
163		/**
164	<	*  getAndSet returns previous value and sets to given value at given index
164	>	* getAndSet returns previous value and sets to given value at given index
165		*/
166	<	public void testGetAndSet(){
167	<	AtomicLongArray ai = new AtomicLongArray(SIZE);
166	>	public void testGetAndSet() {
167	>	AtomicLongArray ai = new AtomicLongArray(SIZE);
168		for (int i = 0; i < SIZE; ++i) {
169		ai.set(i, 1);
170		assertEquals(1,ai.getAndSet(i,0));
#	Line 134 | Line 174 | public class AtomicLongArrayTest extends
174		}
175
176		/**
177	<	*  getAndAdd returns previous value and adds given value
177	>	* getAndAdd returns previous value and adds given value
178		*/
179	<	public void testGetAndAdd(){
180	<	AtomicLongArray ai = new AtomicLongArray(SIZE);
179	>	public void testGetAndAdd() {
180	>	AtomicLongArray ai = new AtomicLongArray(SIZE);
181		for (int i = 0; i < SIZE; ++i) {
182		ai.set(i, 1);
183		assertEquals(1,ai.getAndAdd(i,2));
#	Line 150 | Line 190 | public class AtomicLongArrayTest extends
190		/**
191		* getAndDecrement returns previous value and decrements
192		*/
193	<	public void testGetAndDecrement(){
194	<	AtomicLongArray ai = new AtomicLongArray(SIZE);
193	>	public void testGetAndDecrement() {
194	>	AtomicLongArray ai = new AtomicLongArray(SIZE);
195		for (int i = 0; i < SIZE; ++i) {
196		ai.set(i, 1);
197		assertEquals(1,ai.getAndDecrement(i));
#	Line 163 | Line 203 | public class AtomicLongArrayTest extends
203		/**
204		* getAndIncrement returns previous value and increments
205		*/
206	<	public void testGetAndIncrement(){
207	<	AtomicLongArray ai = new AtomicLongArray(SIZE);
206	>	public void testGetAndIncrement() {
207	>	AtomicLongArray ai = new AtomicLongArray(SIZE);
208		for (int i = 0; i < SIZE; ++i) {
209		ai.set(i, 1);
210		assertEquals(1,ai.getAndIncrement(i));
#	Line 178 | Line 218 | public class AtomicLongArrayTest extends
218		}
219
220		/**
221	<	*  addAndGet adds given value to current, and returns current value
221	>	* addAndGet adds given value to current, and returns current value
222		*/
223		public void testAddAndGet() {
224	<	AtomicLongArray ai = new AtomicLongArray(SIZE);
224	>	AtomicLongArray ai = new AtomicLongArray(SIZE);
225		for (int i = 0; i < SIZE; ++i) {
226		ai.set(i, 1);
227		assertEquals(3,ai.addAndGet(i,2));
#	Line 194 | Line 234 | public class AtomicLongArrayTest extends
234		/**
235		* decrementAndGet decrements and returns current value
236		*/
237	<	public void testDecrementAndGet(){
238	<	AtomicLongArray ai = new AtomicLongArray(SIZE);
237	>	public void testDecrementAndGet() {
238	>	AtomicLongArray ai = new AtomicLongArray(SIZE);
239		for (int i = 0; i < SIZE; ++i) {
240		ai.set(i, 1);
241		assertEquals(0,ai.decrementAndGet(i));
#	Line 209 | Line 249 | public class AtomicLongArrayTest extends
249		* incrementAndGet increments and returns current value
250		*/
251		public void testIncrementAndGet() {
252	<	AtomicLongArray ai = new AtomicLongArray(SIZE);
252	>	AtomicLongArray ai = new AtomicLongArray(SIZE);
253		for (int i = 0; i < SIZE; ++i) {
254		ai.set(i, 1);
255		assertEquals(2,ai.incrementAndGet(i));
#	Line 223 | Line 263 | public class AtomicLongArrayTest extends
263		}
264
265		static final long COUNTDOWN = 100000;
266	<
267	<	class Counter implements Runnable {
266	>
267	>	class Counter extends CheckedRunnable {
268		final AtomicLongArray ai;
269		volatile long counts;
270		Counter(AtomicLongArray a) { ai = a; }
271	<	public void run() {
271	>	public void realRun() {
272		for (;;) {
273		boolean done = true;
274		for (int i = 0; i < ai.length(); ++i) {
275		long v = ai.get(i);
276	<	threadAssertTrue(v >= 0);
276	>	assertTrue(v >= 0);
277		if (v != 0) {
278		done = false;
279		if (ai.compareAndSet(i, v, v-1))
#	Line 250 | Line 290 | public class AtomicLongArrayTest extends
290		* Multiple threads using same array of counters successfully
291		* update a number of times equal to total count
292		*/
293	<	public void testCountingInMultipleThreads() {
294	<	try {
295	<	final AtomicLongArray ai = new AtomicLongArray(SIZE);
296	<	for (int i = 0; i < SIZE; ++i)
297	<	ai.set(i, COUNTDOWN);
298	<	Counter c1 = new Counter(ai);
299	<	Counter c2 = new Counter(ai);
300	<	Thread t1 = new Thread(c1);
301	<	Thread t2 = new Thread(c2);
302	<	t1.start();
303	<	t2.start();
304	<	t1.join();
305	<	t2.join();
266	<	assertEquals(c1.counts+c2.counts, SIZE * COUNTDOWN);
267	<	}
268	<	catch(InterruptedException ie) {
269	<	unexpectedException();
270	<	}
293	>	public void testCountingInMultipleThreads() throws InterruptedException {
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();
305	>	assertEquals(c1.counts+c2.counts, SIZE * COUNTDOWN);
306		}
307
308		/**
309		* a deserialized serialized array holds same values
310		*/
311	<	public void testSerialization() {
312	<	AtomicLongArray l = new AtomicLongArray(SIZE);
313	<	for (int i = 0; i < SIZE; ++i)
311	>	public void testSerialization() throws Exception {
312	>	AtomicLongArray l = new AtomicLongArray(SIZE);
313	>	for (int i = 0; i < SIZE; ++i)
314		l.set(i, -i);
315
316	<	try {
317	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
318	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
319	<	out.writeObject(l);
320	<	out.close();
321	<
322	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
323	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
324	<	AtomicLongArray r = (AtomicLongArray) in.readObject();
325	<	for (int i = 0; i < SIZE; ++i) {
291	<	assertEquals(l.get(i), r.get(i));
292	<	}
293	<	} catch(Exception e){
294	<	unexpectedException();
316	>	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
317	>	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
318	>	out.writeObject(l);
319	>	out.close();
320	>
321	>	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
322	>	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
323	>	AtomicLongArray r = (AtomicLongArray) in.readObject();
324	>	for (int i = 0; i < SIZE; ++i) {
325	>	assertEquals(l.get(i), r.get(i));
326		}
327		}
328
329	+	/**
330	+	* toString returns current value.
331	+	*/
332	+	public void testToString() {
333	+	long[] a = { 17, 3, -42, 99, -7};
334	+	AtomicLongArray ai = new AtomicLongArray(a);
335	+	assertEquals(Arrays.toString(a), ai.toString());
336	+	}
337	+
338
339		}

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