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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 1.8 by dl, Fri Jan 9 20:07:36 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.*;
#	Line 19 | Line 20 | public class AtomicIntegerArrayTest exte
20		}
21
22
23	<	public void testConstructor(){
23	>	/**
24	>	* constructor creates array of given size with all elements zero
25	>	*/
26	>	public void testConstructor() {
27		AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
28		for (int i = 0; i < SIZE; ++i)
29		assertEquals(0,ai.get(i));
30		}
31
32	<	public void testGetSet(){
32	>	/**
33	>	* constructor with null array throws NPE
34	>	*/
35	>	public void testConstructor2NPE() {
36	>	try {
37	>	int[] a = null;
38	>	AtomicIntegerArray ai = new AtomicIntegerArray(a);
39	>	} catch (NullPointerException success) {
40	>	} catch (Exception ex) {
41	>	unexpectedException();
42	>	}
43	>	}
44	>
45	>	/**
46	>	* constructor with array is of same size and has all elements
47	>	*/
48	>	public void testConstructor2() {
49	>	int[] a = { 17, 3, -42, 99, -7};
50	>	AtomicIntegerArray ai = new AtomicIntegerArray(a);
51	>	assertEquals(a.length, ai.length());
52	>	for (int i = 0; i < a.length; ++i)
53	>	assertEquals(a[i], ai.get(i));
54	>	}
55	>
56	>	/**
57	>	* get and set for out of bound indices throw IndexOutOfBoundsException
58	>	*/
59	>	public void testIndexing(){
60	>	AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
61	>	try {
62	>	ai.get(SIZE);
63	>	} catch(IndexOutOfBoundsException success){
64	>	}
65	>	try {
66	>	ai.get(-1);
67	>	} catch(IndexOutOfBoundsException success){
68	>	}
69	>	try {
70	>	ai.set(SIZE, 0);
71	>	} catch(IndexOutOfBoundsException success){
72	>	}
73	>	try {
74	>	ai.set(-1, 0);
75	>	} catch(IndexOutOfBoundsException success){
76	>	}
77	>	}
78	>
79	>	/**
80	>	* get returns the last value set at index
81	>	*/
82	>	public void testGetSet() {
83		AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
84		for (int i = 0; i < SIZE; ++i) {
85		ai.set(i, 1);
#	Line 37 | Line 91 | public class AtomicIntegerArrayTest exte
91		}
92		}
93
94	<	public void testCompareAndSet(){
94	>	/**
95	>	* compareAndSet succeeds in changing value if equal to expected else fails
96	>	*/
97	>	public void testCompareAndSet() {
98		AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
99		for (int i = 0; i < SIZE; ++i) {
100		ai.set(i, 1);
#	Line 51 | Line 108 | public class AtomicIntegerArrayTest exte
108		}
109		}
110
111	<	public void testWeakCompareAndSet(){
111	>	/**
112	>	* compareAndSet in one thread enables another waiting for value
113	>	* to succeed
114	>	*/
115	>	public void testCompareAndSetInMultipleThreads() {
116	>	final AtomicIntegerArray a = new AtomicIntegerArray(1);
117	>	a.set(0, 1);
118	>	Thread t = new Thread(new Runnable() {
119	>	public void run() {
120	>	while(!a.compareAndSet(0, 2, 3)) Thread.yield();
121	>	}});
122	>	try {
123	>	t.start();
124	>	assertTrue(a.compareAndSet(0, 1, 2));
125	>	t.join(LONG_DELAY_MS);
126	>	assertFalse(t.isAlive());
127	>	assertEquals(a.get(0), 3);
128	>	}
129	>	catch(Exception e) {
130	>	unexpectedException();
131	>	}
132	>	}
133	>
134	>	/**
135	>	* repeated weakCompareAndSet succeeds in changing value when equal
136	>	* to expected
137	>	*/
138	>	public void testWeakCompareAndSet() {
139		AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
140		for (int i = 0; i < SIZE; ++i) {
141		ai.set(i, 1);
#	Line 63 | Line 147 | public class AtomicIntegerArrayTest exte
147		}
148		}
149
150	<	public void testGetAndSet(){
150	>	/**
151	>	*  getAndSet returns previous value and sets to given value at given index
152	>	*/
153	>	public void testGetAndSet() {
154		AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
155		for (int i = 0; i < SIZE; ++i) {
156		ai.set(i, 1);
#	Line 73 | Line 160 | public class AtomicIntegerArrayTest exte
160		}
161		}
162
163	<	public void testGetAndAdd(){
163	>	/**
164	>	*  getAndAdd returns previous value and adds given value
165	>	*/
166	>	public void testGetAndAdd() {
167		AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
168		for (int i = 0; i < SIZE; ++i) {
169		ai.set(i, 1);
#	Line 84 | Line 174 | public class AtomicIntegerArrayTest exte
174		}
175		}
176
177	<	public void testGetAndDecrement(){
177	>	/**
178	>	* getAndDecrement returns previous value and decrements
179	>	*/
180	>	public void testGetAndDecrement() {
181		AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
182		for (int i = 0; i < SIZE; ++i) {
183		ai.set(i, 1);
#	Line 94 | Line 187 | public class AtomicIntegerArrayTest exte
187		}
188		}
189
190	<	public void testGetAndIncrement(){
190	>	/**
191	>	* getAndIncrement returns previous value and increments
192	>	*/
193	>	public void testGetAndIncrement() {
194		AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
195		for (int i = 0; i < SIZE; ++i) {
196		ai.set(i, 1);
#	Line 108 | Line 204 | public class AtomicIntegerArrayTest exte
204		}
205		}
206
207	+	/**
208	+	*  addAndGet adds given value to current, and returns current value
209	+	*/
210		public void testAddAndGet() {
211		AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
212		for (int i = 0; i < SIZE; ++i) {
#	Line 119 | Line 218 | public class AtomicIntegerArrayTest exte
218		}
219		}
220
221	<	public void testDecrementAndGet(){
221	>	/**
222	>	* decrementAndGet decrements and returns current value
223	>	*/
224	>	public void testDecrementAndGet() {
225		AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
226		for (int i = 0; i < SIZE; ++i) {
227		ai.set(i, 1);
#	Line 130 | Line 232 | public class AtomicIntegerArrayTest exte
232		}
233		}
234
235	+	/**
236	+	*  incrementAndGet increments and returns current value
237	+	*/
238		public void testIncrementAndGet() {
239		AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
240		for (int i = 0; i < SIZE; ++i) {
#	Line 168 | Line 273 | public class AtomicIntegerArrayTest exte
273		}
274		}
275
276	+	/**
277	+	* Multiple threads using same array of counters successfully
278	+	* update a number of times equal to total count
279	+	*/
280		public void testCountingInMultipleThreads() {
281		try {
282		final AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
#	Line 184 | Line 293 | public class AtomicIntegerArrayTest exte
293		assertEquals(c1.counts+c2.counts, SIZE * COUNTDOWN);
294		}
295		catch(InterruptedException ie) {
296	<	fail("unexpected exception");
296	>	unexpectedException();
297		}
298		}
299
300
301	+	/**
302	+	* a deserialized serialized array holds same values
303	+	*/
304		public void testSerialization() {
305		AtomicIntegerArray l = new AtomicIntegerArray(SIZE);
306		for (int i = 0; i < SIZE; ++i)
#	Line 208 | Line 320 | public class AtomicIntegerArrayTest exte
320		}
321		} catch(Exception e){
322		e.printStackTrace();
323	<	fail("unexpected exception");
323	>	unexpectedException();
324		}
325		}
326
327	+
328	+
329		}

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