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

Comparing jsr166/src/test/tck/AtomicLongArrayTest.java (file contents):
Revision 1.3 by dl, Sun Sep 14 20:42:40 2003 UTC vs.
Revision 1.8 by dl, Sat Jan 10 01:41:59 2004 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) {
#	Line 17 | Line 19 | public class AtomicLongArrayTest extends
19		return new TestSuite(AtomicLongArrayTest.class);
20		}
21
22	+	/**
23	+	* constructor creates array of given size with all elements zero
24	+	*/
25		public void testConstructor(){
26		AtomicLongArray ai = new AtomicLongArray(SIZE);
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	+	} catch (NullPointerException success) {
39	+	} catch (Exception ex) {
40	+	unexpectedException();
41	+	}
42	+	}
43	+
44	+	/**
45	+	* constructor with array is of same size and has all elements
46	+	*/
47	+	public void testConstructor2() {
48	+	long[] a = { 17L, 3L, -42L, 99L, -7L};
49	+	AtomicLongArray ai = new AtomicLongArray(a);
50	+	assertEquals(a.length, ai.length());
51	+	for (int i = 0; i < a.length; ++i)
52	+	assertEquals(a[i], ai.get(i));
53	+	}
54	+
55	+	/**
56	+	* get and set for out of bound indices throw IndexOutOfBoundsException
57	+	*/
58	+	public void testIndexing(){
59	+	AtomicLongArray ai = new AtomicLongArray(SIZE);
60	+	try {
61	+	ai.get(SIZE);
62	+	} catch(IndexOutOfBoundsException success){
63	+	}
64	+	try {
65	+	ai.get(-1);
66	+	} catch(IndexOutOfBoundsException success){
67	+	}
68	+	try {
69	+	ai.set(SIZE, 0);
70	+	} catch(IndexOutOfBoundsException success){
71	+	}
72	+	try {
73	+	ai.set(-1, 0);
74	+	} catch(IndexOutOfBoundsException success){
75	+	}
76	+	}
77	+
78	+	/**
79	+	* get returns the last value set at index
80	+	*/
81		public void testGetSet(){
82		AtomicLongArray ai = new AtomicLongArray(SIZE);
83		for (int i = 0; i < SIZE; ++i) {
#	Line 35 | Line 90 | public class AtomicLongArrayTest extends
90		}
91		}
92
93	+	/**
94	+	* compareAndSet succeeds in changing value if equal to expected else fails
95	+	*/
96		public void testCompareAndSet(){
97		AtomicLongArray ai = new AtomicLongArray(SIZE);
98		for (int i = 0; i < SIZE; ++i) {
#	Line 49 | Line 107 | public class AtomicLongArrayTest extends
107		}
108		}
109
110	+	/**
111	+	* compareAndSet in one thread enables another waiting for value
112	+	* to succeed
113	+	*/
114	+	public void testCompareAndSetInMultipleThreads() {
115	+	final AtomicLongArray a = new AtomicLongArray(1);
116	+	a.set(0, 1);
117	+	Thread t = new Thread(new Runnable() {
118	+	public void run() {
119	+	while(!a.compareAndSet(0, 2, 3)) Thread.yield();
120	+	}});
121	+	try {
122	+	t.start();
123	+	assertTrue(a.compareAndSet(0, 1, 2));
124	+	t.join(LONG_DELAY_MS);
125	+	assertFalse(t.isAlive());
126	+	assertEquals(a.get(0), 3);
127	+	}
128	+	catch(Exception e) {
129	+	unexpectedException();
130	+	}
131	+	}
132	+
133	+	/**
134	+	* repeated weakCompareAndSet succeeds in changing value when equal
135	+	* to expected
136	+	*/
137		public void testWeakCompareAndSet(){
138		AtomicLongArray ai = new AtomicLongArray(SIZE);
139		for (int i = 0; i < SIZE; ++i) {
#	Line 61 | Line 146 | public class AtomicLongArrayTest extends
146		}
147		}
148
149	+	/**
150	+	*  getAndSet returns previous value and sets to given value at given index
151	+	*/
152		public void testGetAndSet(){
153		AtomicLongArray ai = new AtomicLongArray(SIZE);
154		for (int i = 0; i < SIZE; ++i) {
#	Line 71 | Line 159 | public class AtomicLongArrayTest extends
159		}
160		}
161
162	+	/**
163	+	*  getAndAdd returns previous value and adds given value
164	+	*/
165		public void testGetAndAdd(){
166		AtomicLongArray ai = new AtomicLongArray(SIZE);
167		for (int i = 0; i < SIZE; ++i) {
#	Line 82 | Line 173 | public class AtomicLongArrayTest extends
173		}
174		}
175
176	+	/**
177	+	* getAndDecrement returns previous value and decrements
178	+	*/
179		public void testGetAndDecrement(){
180		AtomicLongArray ai = new AtomicLongArray(SIZE);
181		for (int i = 0; i < SIZE; ++i) {
#	Line 92 | Line 186 | public class AtomicLongArrayTest extends
186		}
187		}
188
189	+	/**
190	+	* getAndIncrement returns previous value and increments
191	+	*/
192		public void testGetAndIncrement(){
193		AtomicLongArray ai = new AtomicLongArray(SIZE);
194		for (int i = 0; i < SIZE; ++i) {
#	Line 106 | Line 203 | public class AtomicLongArrayTest extends
203		}
204		}
205
206	+	/**
207	+	*  addAndGet adds given value to current, and returns current value
208	+	*/
209		public void testAddAndGet() {
210		AtomicLongArray ai = new AtomicLongArray(SIZE);
211		for (int i = 0; i < SIZE; ++i) {
#	Line 117 | Line 217 | public class AtomicLongArrayTest extends
217		}
218		}
219
220	+	/**
221	+	* decrementAndGet decrements and returns current value
222	+	*/
223		public void testDecrementAndGet(){
224		AtomicLongArray ai = new AtomicLongArray(SIZE);
225		for (int i = 0; i < SIZE; ++i) {
#	Line 128 | Line 231 | public class AtomicLongArrayTest extends
231		}
232		}
233
234	+	/**
235	+	* incrementAndGet increments and returns current value
236	+	*/
237		public void testIncrementAndGet() {
238		AtomicLongArray ai = new AtomicLongArray(SIZE);
239		for (int i = 0; i < SIZE; ++i) {
#	Line 166 | Line 272 | public class AtomicLongArrayTest extends
272		}
273		}
274
275	+	/**
276	+	* Multiple threads using same array of counters successfully
277	+	* update a number of times equal to total count
278	+	*/
279		public void testCountingInMultipleThreads() {
280		try {
281		final AtomicLongArray ai = new AtomicLongArray(SIZE);
#	Line 182 | Line 292 | public class AtomicLongArrayTest extends
292		assertEquals(c1.counts+c2.counts, SIZE * COUNTDOWN);
293		}
294		catch(InterruptedException ie) {
295	<	fail("unexpected exception");
295	>	unexpectedException();
296		}
297		}
298
299	+	/**
300	+	* a deserialized serialized array holds same values
301	+	*/
302		public void testSerialization() {
303		AtomicLongArray l = new AtomicLongArray(SIZE);
304		for (int i = 0; i < SIZE; ++i)
#	Line 204 | Line 317 | public class AtomicLongArrayTest extends
317		assertEquals(l.get(i), r.get(i));
318		}
319		} catch(Exception e){
320	<	e.printStackTrace();
208	<	fail("unexpected exception");
320	>	unexpectedException();
321		}
322		}
323
324	+	/**
325	+	* toString returns current value.
326	+	*/
327	+	public void testToString() {
328	+	long[] a = { 17, 3, -42, 99, -7};
329	+	AtomicLongArray ai = new AtomicLongArray(a);
330	+	assertEquals(Arrays.toString(a), ai.toString());
331	+	}
332	+
333
334		}

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