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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 1.13 by jsr166, Mon Nov 16 05:30:07 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	>	} 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	>	Integer[] a = { two, one, three, four, seven};
50	>	AtomicReferenceArray<Integer> ai = new AtomicReferenceArray<Integer>(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	>	/**
58	>	* get and set for out of bound indices throw IndexOutOfBoundsException
59	>	*/
60	>	public void testIndexing() {
61	>	AtomicReferenceArray<Integer> ai = new AtomicReferenceArray<Integer>(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, null);
72	>	} catch (IndexOutOfBoundsException success) {
73	>	}
74	>	try {
75	>	ai.set(-1, null);
76	>	} catch (IndexOutOfBoundsException success) {
77	>	}
78	>	}
79	>
80	>	/**
81	>	* get returns the last value set at index
82	>	*/
83	>	public void testGetSet() {
84	>	AtomicReferenceArray ai = new AtomicReferenceArray(SIZE);
85	>	for (int i = 0; i < SIZE; ++i) {
86		ai.set(i, one);
87		assertEquals(one,ai.get(i));
88		ai.set(i, two);
#	Line 47 | Line 92 | public class AtomicReferenceArrayTest ex
92		}
93		}
94
95	<	public void testCompareAndSet(){
96	<	AtomicReferenceArray ai = new AtomicReferenceArray(N);
97	<	for (int i = 0; i < N; ++i) {
95	>	/**
96	>	* get returns the last value lazySet at index by same thread
97	>	*/
98	>	public void testGetLazySet() {
99	>	AtomicReferenceArray ai = new AtomicReferenceArray(SIZE);
100	>	for (int i = 0; i < SIZE; ++i) {
101	>	ai.lazySet(i, one);
102	>	assertEquals(one,ai.get(i));
103	>	ai.lazySet(i, two);
104	>	assertEquals(two,ai.get(i));
105	>	ai.lazySet(i, m3);
106	>	assertEquals(m3,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	>	AtomicReferenceArray ai = new AtomicReferenceArray(SIZE);
115	>	for (int i = 0; i < SIZE; ++i) {
116		ai.set(i, one);
117		assertTrue(ai.compareAndSet(i, one,two));
118		assertTrue(ai.compareAndSet(i, two,m4));
#	Line 61 | Line 124 | public class AtomicReferenceArrayTest ex
124		}
125		}
126
127	<	public void testWeakCompareAndSet(){
128	<	AtomicReferenceArray ai = new AtomicReferenceArray(N);
129	<	for (int i = 0; i < N; ++i) {
127	>	/**
128	>	* compareAndSet in one thread enables another waiting for value
129	>	* to succeed
130	>	*/
131	>	public void testCompareAndSetInMultipleThreads() {
132	>	final AtomicReferenceArray a = new AtomicReferenceArray(1);
133	>	a.set(0, one);
134	>	Thread t = new Thread(new Runnable() {
135	>	public void run() {
136	>	while (!a.compareAndSet(0, two, three)) Thread.yield();
137	>	}});
138	>	try {
139	>	t.start();
140	>	assertTrue(a.compareAndSet(0, one, two));
141	>	t.join(LONG_DELAY_MS);
142	>	assertFalse(t.isAlive());
143	>	assertEquals(a.get(0), three);
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	>	AtomicReferenceArray ai = new AtomicReferenceArray(SIZE);
156	>	for (int i = 0; i < SIZE; ++i) {
157		ai.set(i, one);
158	<	while(!ai.weakCompareAndSet(i, one,two));
159	<	while(!ai.weakCompareAndSet(i, two,m4));
158	>	while (!ai.weakCompareAndSet(i, one,two));
159	>	while (!ai.weakCompareAndSet(i, two,m4));
160		assertEquals(m4,ai.get(i));
161	<	while(!ai.weakCompareAndSet(i, m4,seven));
161	>	while (!ai.weakCompareAndSet(i, m4,seven));
162		assertEquals(seven,ai.get(i));
163		}
164		}
165
166	<	public void testGetAndSet(){
167	<	AtomicReferenceArray ai = new AtomicReferenceArray(N);
168	<	for (int i = 0; i < N; ++i) {
166	>	/**
167	>	* getAndSet returns previous value and sets to given value at given index
168	>	*/
169	>	public void testGetAndSet() {
170	>	AtomicReferenceArray ai = new AtomicReferenceArray(SIZE);
171	>	for (int i = 0; i < SIZE; ++i) {
172		ai.set(i, one);
173		assertEquals(one,ai.getAndSet(i,zero));
174		assertEquals(0,ai.getAndSet(i,m10));
#	Line 83 | Line 176 | public class AtomicReferenceArrayTest ex
176		}
177		}
178
179	+	/**
180	+	* a deserialized serialized array holds same values
181	+	*/
182	+	public void testSerialization() {
183	+	AtomicReferenceArray l = new AtomicReferenceArray(SIZE);
184	+	for (int i = 0; i < SIZE; ++i) {
185	+	l.set(i, new Integer(-i));
186	+	}
187
188	+	try {
189	+	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
190	+	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
191	+	out.writeObject(l);
192	+	out.close();
193	+
194	+	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
195	+	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
196	+	AtomicReferenceArray r = (AtomicReferenceArray) in.readObject();
197	+	assertEquals(l.length(), r.length());
198	+	for (int i = 0; i < SIZE; ++i) {
199	+	assertEquals(r.get(i), l.get(i));
200	+	}
201	+	} catch (Exception e) {
202	+	unexpectedException();
203	+	}
204	+	}
205	+
206	+
207	+	/**
208	+	* toString returns current value.
209	+	*/
210	+	public void testToString() {
211	+	Integer[] a = { two, one, three, four, seven};
212	+	AtomicReferenceArray<Integer> ai = new AtomicReferenceArray<Integer>(a);
213	+	assertEquals(Arrays.toString(a), ai.toString());
214	+	}
215		}

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