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

Comparing jsr166/src/test/tck/AtomicReferenceArrayTest.java (file contents):
Revision 1.1 by dl, Sun Aug 31 19:24:53 2003 UTC vs.
Revision 1.14 by jsr166, Tue Nov 17 02:50:57 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 TestCase
12	<	{
13	<	static final int N = 10;
14	<
15	<	static final Integer zero = new Integer(0);
16	<	static final Integer one = new Integer(1);
17	<	static final Integer two = new Integer(2);
18	<	static final Integer m3  = new Integer(-3);
19	<	static final Integer m4 = new Integer(-4);
20	<	static final Integer m5 = new Integer(-5);
21	<	static final Integer seven = new Integer(7);
22	<	static final Integer m10 = new Integer(-10);
23	<
14	>	public class AtomicReferenceArrayTest extends JSR166TestCase {
15		public static void main (String[] args) {
16		junit.textui.TestRunner.run (suite());
17		}
#	Line 28 | Line 19 | public class AtomicReferenceArrayTest ex
19		return new TestSuite(AtomicReferenceArrayTest.class);
20		}
21
22	<	public void testConstructor(){
23	<	AtomicReferenceArray<Integer> ai = new AtomicReferenceArray<Integer>(N);
24	<	for (int i = 0; i < N; ++i) {
22	>	/**
23	>	* constructor creates array of given size with all elements null
24	>	*/
25	>	public void testConstructor() {
26	>	AtomicReferenceArray<Integer> ai = new AtomicReferenceArray<Integer>(SIZE);
27	>	for (int i = 0; i < SIZE; ++i) {
28		assertNull(ai.get(i));
29		}
30		}
31
32	<	public void testGetSet(){
33	<	AtomicReferenceArray ai = new AtomicReferenceArray(N);
34	<	for (int i = 0; i < N; ++i) {
32	>	/**
33	>	* constructor with null array throws NPE
34	>	*/
35	>	public void testConstructor2NPE() {
36	>	try {
37	>	Integer[] a = null;
38	>	AtomicReferenceArray<Integer> ai = new AtomicReferenceArray<Integer>(a);
39	>	shouldThrow();
40	>	} catch (NullPointerException success) {
41	>	}
42	>
43	>	/**
44	>	* constructor with array is of same size and has all elements
45	>	*/
46	>	public void testConstructor2() {
47	>	Integer[] a = { two, one, three, four, seven};
48	>	AtomicReferenceArray<Integer> ai = new AtomicReferenceArray<Integer>(a);
49	>	assertEquals(a.length, ai.length());
50	>	for (int i = 0; i < a.length; ++i)
51	>	assertEquals(a[i], ai.get(i));
52	>	}
53	>
54	>
55	>	/**
56	>	* get and set for out of bound indices throw IndexOutOfBoundsException
57	>	*/
58	>	public void testIndexing() {
59	>	AtomicReferenceArray<Integer> ai = new AtomicReferenceArray<Integer>(SIZE);
60	>	try {
61	>	ai.get(SIZE);
62	>	shouldThrow();
63	>	} catch (IndexOutOfBoundsException success) {
64	>	}
65	>	try {
66	>	ai.get(-1);
67	>	shouldThrow();
68	>	} catch (IndexOutOfBoundsException success) {
69	>	}
70	>	try {
71	>	ai.set(SIZE, null);
72	>	shouldThrow();
73	>	} catch (IndexOutOfBoundsException success) {
74	>	}
75	>	try {
76	>	ai.set(-1, null);
77	>	shouldThrow();
78	>	} catch (IndexOutOfBoundsException success) {
79	>	}
80	>	}
81	>
82	>	/**
83	>	* get returns the last value set at index
84	>	*/
85	>	public void testGetSet() {
86	>	AtomicReferenceArray ai = new AtomicReferenceArray(SIZE);
87	>	for (int i = 0; i < SIZE; ++i) {
88		ai.set(i, one);
89		assertEquals(one,ai.get(i));
90		ai.set(i, two);
#	Line 47 | Line 94 | public class AtomicReferenceArrayTest ex
94		}
95		}
96
97	<	public void testCompareAndSet(){
98	<	AtomicReferenceArray ai = new AtomicReferenceArray(N);
99	<	for (int i = 0; i < N; ++i) {
97	>	/**
98	>	* get returns the last value lazySet at index by same thread
99	>	*/
100	>	public void testGetLazySet() {
101	>	AtomicReferenceArray ai = new AtomicReferenceArray(SIZE);
102	>	for (int i = 0; i < SIZE; ++i) {
103	>	ai.lazySet(i, one);
104	>	assertEquals(one,ai.get(i));
105	>	ai.lazySet(i, two);
106	>	assertEquals(two,ai.get(i));
107	>	ai.lazySet(i, m3);
108	>	assertEquals(m3,ai.get(i));
109	>	}
110	>	}
111	>
112	>	/**
113	>	* compareAndSet succeeds in changing value if equal to expected else fails
114	>	*/
115	>	public void testCompareAndSet() {
116	>	AtomicReferenceArray ai = new AtomicReferenceArray(SIZE);
117	>	for (int i = 0; i < SIZE; ++i) {
118		ai.set(i, one);
119		assertTrue(ai.compareAndSet(i, one,two));
120		assertTrue(ai.compareAndSet(i, two,m4));
#	Line 61 | Line 126 | public class AtomicReferenceArrayTest ex
126		}
127		}
128
129	<	public void testWeakCompareAndSet(){
130	<	AtomicReferenceArray ai = new AtomicReferenceArray(N);
131	<	for (int i = 0; i < N; ++i) {
129	>	/**
130	>	* compareAndSet in one thread enables another waiting for value
131	>	* to succeed
132	>	*/
133	>	public void testCompareAndSetInMultipleThreads() {
134	>	final AtomicReferenceArray a = new AtomicReferenceArray(1);
135	>	a.set(0, one);
136	>	Thread t = new Thread(new Runnable() {
137	>	public void run() {
138	>	while (!a.compareAndSet(0, two, three)) Thread.yield();
139	>	}});
140	>	try {
141	>	t.start();
142	>	assertTrue(a.compareAndSet(0, one, two));
143	>	t.join(LONG_DELAY_MS);
144	>	assertFalse(t.isAlive());
145	>	assertEquals(a.get(0), three);
146	>	}
147	>	catch (Exception e) {
148	>	unexpectedException();
149	>	}
150	>	}
151	>
152	>	/**
153	>	* repeated weakCompareAndSet succeeds in changing value when equal
154	>	* to expected
155	>	*/
156	>	public void testWeakCompareAndSet() {
157	>	AtomicReferenceArray ai = new AtomicReferenceArray(SIZE);
158	>	for (int i = 0; i < SIZE; ++i) {
159		ai.set(i, one);
160	<	while(!ai.weakCompareAndSet(i, one,two));
161	<	while(!ai.weakCompareAndSet(i, two,m4));
160	>	while (!ai.weakCompareAndSet(i, one,two));
161	>	while (!ai.weakCompareAndSet(i, two,m4));
162		assertEquals(m4,ai.get(i));
163	<	while(!ai.weakCompareAndSet(i, m4,seven));
163	>	while (!ai.weakCompareAndSet(i, m4,seven));
164		assertEquals(seven,ai.get(i));
165		}
166		}
167
168	<	public void testGetAndSet(){
169	<	AtomicReferenceArray ai = new AtomicReferenceArray(N);
170	<	for (int i = 0; i < N; ++i) {
168	>	/**
169	>	* getAndSet returns previous value and sets to given value at given index
170	>	*/
171	>	public void testGetAndSet() {
172	>	AtomicReferenceArray ai = new AtomicReferenceArray(SIZE);
173	>	for (int i = 0; i < SIZE; ++i) {
174		ai.set(i, one);
175		assertEquals(one,ai.getAndSet(i,zero));
176		assertEquals(0,ai.getAndSet(i,m10));
#	Line 83 | Line 178 | public class AtomicReferenceArrayTest ex
178		}
179		}
180
181	+	/**
182	+	* a deserialized serialized array holds same values
183	+	*/
184	+	public void testSerialization() {
185	+	AtomicReferenceArray l = new AtomicReferenceArray(SIZE);
186	+	for (int i = 0; i < SIZE; ++i) {
187	+	l.set(i, new Integer(-i));
188	+	}
189	+
190	+	try {
191	+	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
192	+	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
193	+	out.writeObject(l);
194	+	out.close();
195	+
196	+	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
197	+	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
198	+	AtomicReferenceArray r = (AtomicReferenceArray) in.readObject();
199	+	assertEquals(l.length(), r.length());
200	+	for (int i = 0; i < SIZE; ++i) {
201	+	assertEquals(r.get(i), l.get(i));
202	+	}
203	+	} catch (Exception e) {
204	+	unexpectedException();
205	+	}
206	+	}
207	+
208
209	+	/**
210	+	* toString returns current value.
211	+	*/
212	+	public void testToString() {
213	+	Integer[] a = { two, one, three, four, seven};
214	+	AtomicReferenceArray<Integer> ai = new AtomicReferenceArray<Integer>(a);
215	+	assertEquals(Arrays.toString(a), ai.toString());
216	+	}
217		}

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