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

Comparing jsr166/src/test/tck/AtomicIntegerArrayTest.java (file contents):
Revision 1.4 by dl, Sat Sep 20 18:20:07 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 20 | Line 22 | public class AtomicIntegerArrayTest exte
22
23
24		/**
25	<	*
25	>	* constructor creates array of given size with all elements zero
26		*/
27		public void testConstructor() {
28		AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
#	Line 29 | Line 31 | public class AtomicIntegerArrayTest exte
31		}
32
33		/**
34	<	*
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);
#	Line 44 | Line 93 | public class AtomicIntegerArrayTest exte
93		}
94
95		/**
96	<	*
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);
#	Line 61 | Line 125 | public class AtomicIntegerArrayTest exte
125		}
126
127		/**
128	<	*
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);
#	Line 76 | Line 164 | public class AtomicIntegerArrayTest exte
164		}
165
166		/**
167	<	*
167	>	*  getAndSet returns previous value and sets to given value at given index
168		*/
169		public void testGetAndSet() {
170		AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
#	Line 89 | Line 177 | public class AtomicIntegerArrayTest exte
177		}
178
179		/**
180	<	*
180	>	*  getAndAdd returns previous value and adds given value
181		*/
182		public void testGetAndAdd() {
183		AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
#	Line 103 | Line 191 | public class AtomicIntegerArrayTest exte
191		}
192
193		/**
194	<	*
194	>	* getAndDecrement returns previous value and decrements
195		*/
196		public void testGetAndDecrement() {
197		AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
#	Line 116 | Line 204 | public class AtomicIntegerArrayTest exte
204		}
205
206		/**
207	<	*
207	>	* getAndIncrement returns previous value and increments
208		*/
209		public void testGetAndIncrement() {
210		AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
#	Line 133 | Line 221 | public class AtomicIntegerArrayTest exte
221		}
222
223		/**
224	<	*
224	>	*  addAndGet adds given value to current, and returns current value
225		*/
226		public void testAddAndGet() {
227		AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
#	Line 147 | Line 235 | public class AtomicIntegerArrayTest exte
235		}
236
237		/**
238	<	*
238	>	* decrementAndGet decrements and returns current value
239		*/
240		public void testDecrementAndGet() {
241		AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
#	Line 161 | Line 249 | public class AtomicIntegerArrayTest exte
249		}
250
251		/**
252	<	*
252	>	*  incrementAndGet increments and returns current value
253		*/
254		public void testIncrementAndGet() {
255		AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
#	Line 202 | Line 290 | public class AtomicIntegerArrayTest exte
290		}
291
292		/**
293	<	*
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 {
#	Line 226 | Line 315 | public class AtomicIntegerArrayTest exte
315
316
317		/**
318	<	*
318	>	* a deserialized serialized array holds same values
319		*/
320		public void testSerialization() {
321		AtomicIntegerArray l = new AtomicIntegerArray(SIZE);
#	Line 251 | Line 340 | public class AtomicIntegerArrayTest exte
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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