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

Comparing jsr166/src/test/tck/AtomicReferenceArrayTest.java (file contents):
Revision 1.2 by dl, Sun Sep 7 20:39:11 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.*;
10		import java.util.concurrent.atomic.*;
11		import java.io.*;
12
13	<	public class AtomicReferenceArrayTest extends TestCase
13	>	public class AtomicReferenceArrayTest extends JSR166TestCase
14		{
14	–	static final int N = 10;
15	–
16	–	static final Integer zero = new Integer(0);
17	–	static final Integer one = new Integer(1);
18	–	static final Integer two = new Integer(2);
19	–	static final Integer m3  = new Integer(-3);
20	–	static final Integer m4 = new Integer(-4);
21	–	static final Integer m5 = new Integer(-5);
22	–	static final Integer seven = new Integer(7);
23	–	static final Integer m10 = new Integer(-10);
24	–
15		public static void main (String[] args) {
16		junit.textui.TestRunner.run (suite());
17		}
#	Line 29 | Line 19 | public class AtomicReferenceArrayTest ex
19		return new TestSuite(AtomicReferenceArrayTest.class);
20		}
21
22	+	/**
23	+	* constructor creates array of given size with all elements null
24	+	*/
25		public void testConstructor(){
26	<	AtomicReferenceArray<Integer> ai = new AtomicReferenceArray<Integer>(N);
27	<	for (int i = 0; i < N; ++i) {
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	+	/**
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(N);
85	<	for (int i = 0; i < N; ++i) {
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 48 | Line 92 | public class AtomicReferenceArrayTest ex
92		}
93		}
94
95	+	/**
96	+	* compareAndSet succeeds in changing value if equal to expected else fails
97	+	*/
98		public void testCompareAndSet(){
99	<	AtomicReferenceArray ai = new AtomicReferenceArray(N);
100	<	for (int i = 0; i < N; ++i) {
99	>	AtomicReferenceArray ai = new AtomicReferenceArray(SIZE);
100	>	for (int i = 0; i < SIZE; ++i) {
101		ai.set(i, one);
102		assertTrue(ai.compareAndSet(i, one,two));
103		assertTrue(ai.compareAndSet(i, two,m4));
#	Line 62 | Line 109 | public class AtomicReferenceArrayTest ex
109		}
110		}
111
112	+	/**
113	+	* compareAndSet in one thread enables another waiting for value
114	+	* to succeed
115	+	*/
116	+	public void testCompareAndSetInMultipleThreads() {
117	+	final AtomicReferenceArray a = new AtomicReferenceArray(1);
118	+	a.set(0, one);
119	+	Thread t = new Thread(new Runnable() {
120	+	public void run() {
121	+	while(!a.compareAndSet(0, two, three)) Thread.yield();
122	+	}});
123	+	try {
124	+	t.start();
125	+	assertTrue(a.compareAndSet(0, one, two));
126	+	t.join(LONG_DELAY_MS);
127	+	assertFalse(t.isAlive());
128	+	assertEquals(a.get(0), three);
129	+	}
130	+	catch(Exception e) {
131	+	unexpectedException();
132	+	}
133	+	}
134	+
135	+	/**
136	+	* repeated weakCompareAndSet succeeds in changing value when equal
137	+	* to expected
138	+	*/
139		public void testWeakCompareAndSet(){
140	<	AtomicReferenceArray ai = new AtomicReferenceArray(N);
141	<	for (int i = 0; i < N; ++i) {
140	>	AtomicReferenceArray ai = new AtomicReferenceArray(SIZE);
141	>	for (int i = 0; i < SIZE; ++i) {
142		ai.set(i, one);
143		while(!ai.weakCompareAndSet(i, one,two));
144		while(!ai.weakCompareAndSet(i, two,m4));
#	Line 74 | Line 148 | public class AtomicReferenceArrayTest ex
148		}
149		}
150
151	+	/**
152	+	* getAndSet returns previous value and sets to given value at given index
153	+	*/
154		public void testGetAndSet(){
155	<	AtomicReferenceArray ai = new AtomicReferenceArray(N);
156	<	for (int i = 0; i < N; ++i) {
155	>	AtomicReferenceArray ai = new AtomicReferenceArray(SIZE);
156	>	for (int i = 0; i < SIZE; ++i) {
157		ai.set(i, one);
158		assertEquals(one,ai.getAndSet(i,zero));
159		assertEquals(0,ai.getAndSet(i,m10));
#	Line 84 | Line 161 | public class AtomicReferenceArrayTest ex
161		}
162		}
163
164	+	/**
165	+	* a deserialized serialized array holds same values
166	+	*/
167		public void testSerialization() {
168	<	AtomicReferenceArray l = new AtomicReferenceArray(10);
169	<	for (int i = 0; i < 10; ++i) {
168	>	AtomicReferenceArray l = new AtomicReferenceArray(SIZE);
169	>	for (int i = 0; i < SIZE; ++i) {
170		l.set(i, new Integer(-i));
171		}
172
#	Line 100 | Line 180 | public class AtomicReferenceArrayTest ex
180		ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
181		AtomicReferenceArray r = (AtomicReferenceArray) in.readObject();
182		assertEquals(l.length(), r.length());
183	<	for (int i = 0; i < 10; ++i) {
183	>	for (int i = 0; i < SIZE; ++i) {
184		assertEquals(r.get(i), l.get(i));
185		}
186		} catch(Exception e){
187	<	e.printStackTrace();
108	<	fail("unexpected exception");
187	>	unexpectedException();
188		}
189		}
190
191	+
192		}

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