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

Comparing jsr166/src/test/tck/AtomicIntegerArrayTest.java (file contents):
Revision 1.3 by dl, Sun Sep 14 20:42:40 2003 UTC vs.
Revision 1.10 by dl, Wed May 25 14:27:37 2005 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 AtomicIntegerArrayTest extends JSR166TestCase {
15
#	Line 19 | Line 21 | public class AtomicIntegerArrayTest exte
21		}
22
23
24	<	public void testConstructor(){
24	>	/**
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));
31		}
32
33	<	public void testGetSet(){
33	>	/**
34	>	* constructor with null array throws NPE
35	>	*/
36	>	public void testConstructor2NPE() {
37	>	try {
38	>	int[] a = null;
39	>	AtomicIntegerArray ai = new AtomicIntegerArray(a);
40	>	} catch (NullPointerException success) {
41	>	} catch (Exception ex) {
42	>	unexpectedException();
43	>	}
44	>	}
45	>
46	>	/**
47	>	* constructor with array is of same size and has all elements
48	>	*/
49	>	public void testConstructor2() {
50	>	int[] a = { 17, 3, -42, 99, -7};
51	>	AtomicIntegerArray ai = new AtomicIntegerArray(a);
52	>	assertEquals(a.length, ai.length());
53	>	for (int i = 0; i < a.length; ++i)
54	>	assertEquals(a[i], ai.get(i));
55	>	}
56	>
57	>	/**
58	>	* get and set for out of bound indices throw IndexOutOfBoundsException
59	>	*/
60	>	public void testIndexing(){
61	>	AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
62	>	try {
63	>	ai.get(SIZE);
64	>	} catch(IndexOutOfBoundsException success){
65	>	}
66	>	try {
67	>	ai.get(-1);
68	>	} catch(IndexOutOfBoundsException success){
69	>	}
70	>	try {
71	>	ai.set(SIZE, 0);
72	>	} catch(IndexOutOfBoundsException success){
73	>	}
74	>	try {
75	>	ai.set(-1, 0);
76	>	} catch(IndexOutOfBoundsException success){
77	>	}
78	>	}
79	>
80	>	/**
81	>	* get returns the last value set at index
82	>	*/
83	>	public void testGetSet() {
84		AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
85		for (int i = 0; i < SIZE; ++i) {
86		ai.set(i, 1);
#	Line 37 | Line 92 | public class AtomicIntegerArrayTest exte
92		}
93		}
94
95	<	public void testCompareAndSet(){
95	>	/**
96	>	* get returns the last value lazySet at index by same thread
97	>	*/
98	>	public void testGetLazySet() {
99	>	AtomicIntegerArray ai = new AtomicIntegerArray(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		AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
115		for (int i = 0; i < SIZE; ++i) {
116		ai.set(i, 1);
#	Line 51 | Line 124 | public class AtomicIntegerArrayTest exte
124		}
125		}
126
127	<	public void testWeakCompareAndSet(){
127	>	/**
128	>	* compareAndSet in one thread enables another waiting for value
129	>	* to succeed
130	>	*/
131	>	public void testCompareAndSetInMultipleThreads() {
132	>	final AtomicIntegerArray a = new AtomicIntegerArray(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	>	}
145	>	catch(Exception e) {
146	>	unexpectedException();
147	>	}
148	>	}
149	>
150	>	/**
151	>	* repeated weakCompareAndSet succeeds in changing value when equal
152	>	* to expected
153	>	*/
154	>	public void testWeakCompareAndSet() {
155		AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
156		for (int i = 0; i < SIZE; ++i) {
157		ai.set(i, 1);
#	Line 63 | Line 163 | public class AtomicIntegerArrayTest exte
163		}
164		}
165
166	<	public void testGetAndSet(){
166	>	/**
167	>	*  getAndSet returns previous value and sets to given value at given index
168	>	*/
169	>	public void testGetAndSet() {
170		AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
171		for (int i = 0; i < SIZE; ++i) {
172		ai.set(i, 1);
#	Line 73 | Line 176 | public class AtomicIntegerArrayTest exte
176		}
177		}
178
179	<	public void testGetAndAdd(){
179	>	/**
180	>	*  getAndAdd returns previous value and adds given value
181	>	*/
182	>	public void testGetAndAdd() {
183		AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
184		for (int i = 0; i < SIZE; ++i) {
185		ai.set(i, 1);
#	Line 84 | Line 190 | public class AtomicIntegerArrayTest exte
190		}
191		}
192
193	<	public void testGetAndDecrement(){
193	>	/**
194	>	* getAndDecrement returns previous value and decrements
195	>	*/
196	>	public void testGetAndDecrement() {
197		AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
198		for (int i = 0; i < SIZE; ++i) {
199		ai.set(i, 1);
#	Line 94 | Line 203 | public class AtomicIntegerArrayTest exte
203		}
204		}
205
206	<	public void testGetAndIncrement(){
206	>	/**
207	>	* getAndIncrement returns previous value and increments
208	>	*/
209	>	public void testGetAndIncrement() {
210		AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
211		for (int i = 0; i < SIZE; ++i) {
212		ai.set(i, 1);
#	Line 108 | Line 220 | public class AtomicIntegerArrayTest exte
220		}
221		}
222
223	+	/**
224	+	*  addAndGet adds given value to current, and returns current value
225	+	*/
226		public void testAddAndGet() {
227		AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
228		for (int i = 0; i < SIZE; ++i) {
#	Line 119 | Line 234 | public class AtomicIntegerArrayTest exte
234		}
235		}
236
237	<	public void testDecrementAndGet(){
237	>	/**
238	>	* decrementAndGet decrements and returns current value
239	>	*/
240	>	public void testDecrementAndGet() {
241		AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
242		for (int i = 0; i < SIZE; ++i) {
243		ai.set(i, 1);
#	Line 130 | Line 248 | public class AtomicIntegerArrayTest exte
248		}
249		}
250
251	+	/**
252	+	*  incrementAndGet increments and returns current value
253	+	*/
254		public void testIncrementAndGet() {
255		AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
256		for (int i = 0; i < SIZE; ++i) {
#	Line 168 | Line 289 | public class AtomicIntegerArrayTest exte
289		}
290		}
291
292	+	/**
293	+	* Multiple threads using same array of counters successfully
294	+	* update a number of times equal to total count
295	+	*/
296		public void testCountingInMultipleThreads() {
297		try {
298		final AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
#	Line 184 | Line 309 | public class AtomicIntegerArrayTest exte
309		assertEquals(c1.counts+c2.counts, SIZE * COUNTDOWN);
310		}
311		catch(InterruptedException ie) {
312	<	fail("unexpected exception");
312	>	unexpectedException();
313		}
314		}
315
316
317	+	/**
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)
#	Line 208 | Line 336 | public class AtomicIntegerArrayTest exte
336		}
337		} catch(Exception e){
338		e.printStackTrace();
339	<	fail("unexpected exception");
339	>	unexpectedException();
340		}
341		}
342
343	+
344	+	/**
345	+	* toString returns current value.
346	+	*/
347	+	public void testToString() {
348	+	int[] a = { 17, 3, -42, 99, -7};
349	+	AtomicIntegerArray ai = new AtomicIntegerArray(a);
350	+	assertEquals(Arrays.toString(a), ai.toString());
351	+	}
352	+
353		}

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