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

Comparing jsr166/src/test/tck/AtomicReferenceArrayTest.java (file contents):
Revision 1.3 by dl, Sun Sep 14 20:42:40 2003 UTC vs.
Revision 1.12 by jsr166, Mon Nov 16 04:57:10 2009 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 AtomicReferenceArrayTest extends JSR166TestCase
14	>	public class AtomicReferenceArrayTest extends JSR166TestCase
15		{
16		public static void main (String[] args) {
17		junit.textui.TestRunner.run (suite());
#	Line 18 | Line 20 | public class AtomicReferenceArrayTest ex
20		return new TestSuite(AtomicReferenceArrayTest.class);
21		}
22
23	+	/**
24	+	* constructor creates array of given size with all elements null
25	+	*/
26		public void testConstructor(){
27		AtomicReferenceArray<Integer> ai = new AtomicReferenceArray<Integer>(SIZE);
28		for (int i = 0; i < SIZE; ++i) {
#	Line 25 | Line 30 | public class AtomicReferenceArrayTest ex
30		}
31		}
32
33	+	/**
34	+	* constructor with null array throws NPE
35	+	*/
36	+	public void testConstructor2NPE() {
37	+	try {
38	+	Integer[] a = null;
39	+	AtomicReferenceArray<Integer> ai = new AtomicReferenceArray<Integer>(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	+	Integer[] a = { two, one, three, four, seven};
51	+	AtomicReferenceArray<Integer> ai = new AtomicReferenceArray<Integer>(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	+	/**
59	+	* get and set for out of bound indices throw IndexOutOfBoundsException
60	+	*/
61	+	public void testIndexing(){
62	+	AtomicReferenceArray<Integer> ai = new AtomicReferenceArray<Integer>(SIZE);
63	+	try {
64	+	ai.get(SIZE);
65	+	} catch (IndexOutOfBoundsException success){
66	+	}
67	+	try {
68	+	ai.get(-1);
69	+	} catch (IndexOutOfBoundsException success){
70	+	}
71	+	try {
72	+	ai.set(SIZE, null);
73	+	} catch (IndexOutOfBoundsException success){
74	+	}
75	+	try {
76	+	ai.set(-1, null);
77	+	} catch (IndexOutOfBoundsException success){
78	+	}
79	+	}
80	+
81	+	/**
82	+	* get returns the last value set at index
83	+	*/
84		public void testGetSet(){
85	<	AtomicReferenceArray ai = new AtomicReferenceArray(SIZE);
85	>	AtomicReferenceArray ai = new AtomicReferenceArray(SIZE);
86		for (int i = 0; i < SIZE; ++i) {
87		ai.set(i, one);
88		assertEquals(one,ai.get(i));
#	Line 37 | Line 93 | public class AtomicReferenceArrayTest ex
93		}
94		}
95
96	+	/**
97	+	* get returns the last value lazySet at index by same thread
98	+	*/
99	+	public void testGetLazySet(){
100	+	AtomicReferenceArray ai = new AtomicReferenceArray(SIZE);
101	+	for (int i = 0; i < SIZE; ++i) {
102	+	ai.lazySet(i, one);
103	+	assertEquals(one,ai.get(i));
104	+	ai.lazySet(i, two);
105	+	assertEquals(two,ai.get(i));
106	+	ai.lazySet(i, m3);
107	+	assertEquals(m3,ai.get(i));
108	+	}
109	+	}
110	+
111	+	/**
112	+	* compareAndSet succeeds in changing value if equal to expected else fails
113	+	*/
114		public void testCompareAndSet(){
115	<	AtomicReferenceArray ai = new AtomicReferenceArray(SIZE);
115	>	AtomicReferenceArray ai = new AtomicReferenceArray(SIZE);
116		for (int i = 0; i < SIZE; ++i) {
117		ai.set(i, one);
118		assertTrue(ai.compareAndSet(i, one,two));
#	Line 51 | Line 125 | public class AtomicReferenceArrayTest ex
125		}
126		}
127
128	+	/**
129	+	* compareAndSet in one thread enables another waiting for value
130	+	* to succeed
131	+	*/
132	+	public void testCompareAndSetInMultipleThreads() {
133	+	final AtomicReferenceArray a = new AtomicReferenceArray(1);
134	+	a.set(0, one);
135	+	Thread t = new Thread(new Runnable() {
136	+	public void run() {
137	+	while (!a.compareAndSet(0, two, three)) Thread.yield();
138	+	}});
139	+	try {
140	+	t.start();
141	+	assertTrue(a.compareAndSet(0, one, two));
142	+	t.join(LONG_DELAY_MS);
143	+	assertFalse(t.isAlive());
144	+	assertEquals(a.get(0), three);
145	+	}
146	+	catch (Exception e) {
147	+	unexpectedException();
148	+	}
149	+	}
150	+
151	+	/**
152	+	* repeated weakCompareAndSet succeeds in changing value when equal
153	+	* to expected
154	+	*/
155		public void testWeakCompareAndSet(){
156	<	AtomicReferenceArray ai = new AtomicReferenceArray(SIZE);
156	>	AtomicReferenceArray ai = new AtomicReferenceArray(SIZE);
157		for (int i = 0; i < SIZE; ++i) {
158		ai.set(i, one);
159	<	while(!ai.weakCompareAndSet(i, one,two));
160	<	while(!ai.weakCompareAndSet(i, two,m4));
159	>	while (!ai.weakCompareAndSet(i, one,two));
160	>	while (!ai.weakCompareAndSet(i, two,m4));
161		assertEquals(m4,ai.get(i));
162	<	while(!ai.weakCompareAndSet(i, m4,seven));
162	>	while (!ai.weakCompareAndSet(i, m4,seven));
163		assertEquals(seven,ai.get(i));
164		}
165		}
166
167	+	/**
168	+	* getAndSet returns previous value and sets to given value at given index
169	+	*/
170		public void testGetAndSet(){
171	<	AtomicReferenceArray ai = new AtomicReferenceArray(SIZE);
171	>	AtomicReferenceArray ai = new AtomicReferenceArray(SIZE);
172		for (int i = 0; i < SIZE; ++i) {
173		ai.set(i, one);
174		assertEquals(one,ai.getAndSet(i,zero));
#	Line 73 | Line 177 | public class AtomicReferenceArrayTest ex
177		}
178		}
179
180	+	/**
181	+	* a deserialized serialized array holds same values
182	+	*/
183		public void testSerialization() {
184	<	AtomicReferenceArray l = new AtomicReferenceArray(SIZE);
184	>	AtomicReferenceArray l = new AtomicReferenceArray(SIZE);
185		for (int i = 0; i < SIZE; ++i) {
186		l.set(i, new Integer(-i));
187		}
#	Line 92 | Line 199 | public class AtomicReferenceArrayTest ex
199		for (int i = 0; i < SIZE; ++i) {
200		assertEquals(r.get(i), l.get(i));
201		}
202	<	} catch(Exception e){
203	<	e.printStackTrace();
97	<	fail("unexpected exception");
202	>	} catch (Exception e){
203	>	unexpectedException();
204		}
205		}
206
207	+
208	+	/**
209	+	* toString returns current value.
210	+	*/
211	+	public void testToString() {
212	+	Integer[] a = { two, one, three, four, seven};
213	+	AtomicReferenceArray<Integer> ai = new AtomicReferenceArray<Integer>(a);
214	+	assertEquals(Arrays.toString(a), ai.toString());
215	+	}
216		}

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