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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 1.26 by jsr166, Wed Aug 10 07:14:48 2011 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/publicdomain/zero/1.0/
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.*;
10	>	import java.util.Arrays;
11	>	import java.util.concurrent.atomic.AtomicReferenceArray;
12
13	<	public class AtomicReferenceArrayTest extends TestCase
14	<	{
15	<	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	<
25	<	public static void main (String[] args) {
26	<	junit.textui.TestRunner.run (suite());
13	>	public class AtomicReferenceArrayTest extends JSR166TestCase {
14	>	public static void main(String[] args) {
15	>	junit.textui.TestRunner.run(suite());
16		}
17		public static Test suite() {
18		return new TestSuite(AtomicReferenceArrayTest.class);
19		}
20
21	<	public void testConstructor(){
22	<	AtomicReferenceArray<Integer> ai = new AtomicReferenceArray<Integer>(N);
23	<	for (int i = 0; i < N; ++i) {
24	<	assertNull(ai.get(i));
21	>	/**
22	>	* constructor creates array of given size with all elements null
23	>	*/
24	>	public void testConstructor() {
25	>	AtomicReferenceArray<Integer> aa = new AtomicReferenceArray<Integer>(SIZE);
26	>	for (int i = 0; i < SIZE; i++) {
27	>	assertNull(aa.get(i));
28		}
29		}
30
31	<	public void testGetSet(){
32	<	AtomicReferenceArray ai = new AtomicReferenceArray(N);
33	<	for (int i = 0; i < N; ++i) {
34	<	ai.set(i, one);
43	<	assertEquals(one,ai.get(i));
44	<	ai.set(i, two);
45	<	assertEquals(two,ai.get(i));
46	<	ai.set(i, m3);
47	<	assertEquals(m3,ai.get(i));
48	<	}
49	<	}
50	<
51	<	public void testCompareAndSet(){
52	<	AtomicReferenceArray ai = new AtomicReferenceArray(N);
53	<	for (int i = 0; i < N; ++i) {
54	<	ai.set(i, one);
55	<	assertTrue(ai.compareAndSet(i, one,two));
56	<	assertTrue(ai.compareAndSet(i, two,m4));
57	<	assertEquals(m4,ai.get(i));
58	<	assertFalse(ai.compareAndSet(i, m5,seven));
59	<	assertFalse((seven.equals(ai.get(i))));
60	<	assertTrue(ai.compareAndSet(i, m4,seven));
61	<	assertEquals(seven,ai.get(i));
62	<	}
63	<	}
64	<
65	<	public void testWeakCompareAndSet(){
66	<	AtomicReferenceArray ai = new AtomicReferenceArray(N);
67	<	for (int i = 0; i < N; ++i) {
68	<	ai.set(i, one);
69	<	while(!ai.weakCompareAndSet(i, one,two));
70	<	while(!ai.weakCompareAndSet(i, two,m4));
71	<	assertEquals(m4,ai.get(i));
72	<	while(!ai.weakCompareAndSet(i, m4,seven));
73	<	assertEquals(seven,ai.get(i));
74	<	}
75	<	}
76	<
77	<	public void testGetAndSet(){
78	<	AtomicReferenceArray ai = new AtomicReferenceArray(N);
79	<	for (int i = 0; i < N; ++i) {
80	<	ai.set(i, one);
81	<	assertEquals(one,ai.getAndSet(i,zero));
82	<	assertEquals(0,ai.getAndSet(i,m10));
83	<	assertEquals(m10,ai.getAndSet(i,one));
84	<	}
85	<	}
86	<
87	<	public void testSerialization() {
88	<	AtomicReferenceArray l = new AtomicReferenceArray(10);
89	<	for (int i = 0; i < 10; ++i) {
90	<	l.set(i, new Integer(-i));
91	<	}
92	<
31	>	/**
32	>	* constructor with null array throws NPE
33	>	*/
34	>	public void testConstructor2NPE() {
35		try {
36	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
37	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
38	<	out.writeObject(l);
39	<	out.close();
40	<
41	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
42	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
43	<	AtomicReferenceArray r = (AtomicReferenceArray) in.readObject();
44	<	assertEquals(l.length(), r.length());
45	<	for (int i = 0; i < 10; ++i) {
46	<	assertEquals(r.get(i), l.get(i));
47	<	}
48	<	} catch(Exception e){
49	<	e.printStackTrace();
50	<	fail("unexpected exception");
51	<	}
36	>	Integer[] a = null;
37	>	AtomicReferenceArray<Integer> aa = new AtomicReferenceArray<Integer>(a);
38	>	shouldThrow();
39	>	} catch (NullPointerException success) {}
40	>	}
41	>
42	>	/**
43	>	* constructor with array is of same size and has all elements
44	>	*/
45	>	public void testConstructor2() {
46	>	Integer[] a = { two, one, three, four, seven };
47	>	AtomicReferenceArray<Integer> aa = new AtomicReferenceArray<Integer>(a);
48	>	assertEquals(a.length, aa.length());
49	>	for (int i = 0; i < a.length; i++)
50	>	assertEquals(a[i], aa.get(i));
51	>	}
52	>
53	>	/**
54	>	* Initialize AtomicReference<Class> with SubClass[]
55	>	*/
56	>	public void testConstructorSubClassArray() {
57	>	Integer[] a = { two, one, three, four, seven };
58	>	AtomicReferenceArray<Number> aa = new AtomicReferenceArray<Number>(a);
59	>	assertEquals(a.length, aa.length());
60	>	for (int i = 0; i < a.length; i++) {
61	>	assertSame(a[i], aa.get(i));
62	>	Long x = Long.valueOf(i);
63	>	aa.set(i, x);
64	>	assertSame(x, aa.get(i));
65	>	}
66	>	}
67	>
68	>	/**
69	>	* get and set for out of bound indices throw IndexOutOfBoundsException
70	>	*/
71	>	public void testIndexing() {
72	>	AtomicReferenceArray<Integer> aa = new AtomicReferenceArray<Integer>(SIZE);
73	>	for (int index : new int[] { -1, SIZE }) {
74	>	try {
75	>	aa.get(index);
76	>	shouldThrow();
77	>	} catch (IndexOutOfBoundsException success) {}
78	>	try {
79	>	aa.set(index, null);
80	>	shouldThrow();
81	>	} catch (IndexOutOfBoundsException success) {}
82	>	try {
83	>	aa.lazySet(index, null);
84	>	shouldThrow();
85	>	} catch (IndexOutOfBoundsException success) {}
86	>	try {
87	>	aa.compareAndSet(index, null, null);
88	>	shouldThrow();
89	>	} catch (IndexOutOfBoundsException success) {}
90	>	try {
91	>	aa.weakCompareAndSet(index, null, null);
92	>	shouldThrow();
93	>	} catch (IndexOutOfBoundsException success) {}
94	>	}
95	>	}
96	>
97	>	/**
98	>	* get returns the last value set at index
99	>	*/
100	>	public void testGetSet() {
101	>	AtomicReferenceArray aa = new AtomicReferenceArray(SIZE);
102	>	for (int i = 0; i < SIZE; i++) {
103	>	aa.set(i, one);
104	>	assertSame(one, aa.get(i));
105	>	aa.set(i, two);
106	>	assertSame(two, aa.get(i));
107	>	aa.set(i, m3);
108	>	assertSame(m3, aa.get(i));
109	>	}
110	>	}
111	>
112	>	/**
113	>	* get returns the last value lazySet at index by same thread
114	>	*/
115	>	public void testGetLazySet() {
116	>	AtomicReferenceArray aa = new AtomicReferenceArray(SIZE);
117	>	for (int i = 0; i < SIZE; i++) {
118	>	aa.lazySet(i, one);
119	>	assertSame(one, aa.get(i));
120	>	aa.lazySet(i, two);
121	>	assertSame(two, aa.get(i));
122	>	aa.lazySet(i, m3);
123	>	assertSame(m3, aa.get(i));
124	>	}
125	>	}
126	>
127	>	/**
128	>	* compareAndSet succeeds in changing value if equal to expected else fails
129	>	*/
130	>	public void testCompareAndSet() {
131	>	AtomicReferenceArray aa = new AtomicReferenceArray(SIZE);
132	>	for (int i = 0; i < SIZE; i++) {
133	>	aa.set(i, one);
134	>	assertTrue(aa.compareAndSet(i, one, two));
135	>	assertTrue(aa.compareAndSet(i, two, m4));
136	>	assertSame(m4, aa.get(i));
137	>	assertFalse(aa.compareAndSet(i, m5, seven));
138	>	assertSame(m4, aa.get(i));
139	>	assertTrue(aa.compareAndSet(i, m4, seven));
140	>	assertSame(seven, aa.get(i));
141	>	}
142	>	}
143	>
144	>	/**
145	>	* compareAndSet in one thread enables another waiting for value
146	>	* to succeed
147	>	*/
148	>	public void testCompareAndSetInMultipleThreads() throws InterruptedException {
149	>	final AtomicReferenceArray a = new AtomicReferenceArray(1);
150	>	a.set(0, one);
151	>	Thread t = new Thread(new CheckedRunnable() {
152	>	public void realRun() {
153	>	while (!a.compareAndSet(0, two, three))
154	>	Thread.yield();
155	>	}});
156	>
157	>	t.start();
158	>	assertTrue(a.compareAndSet(0, one, two));
159	>	t.join(LONG_DELAY_MS);
160	>	assertFalse(t.isAlive());
161	>	assertSame(three, a.get(0));
162	>	}
163	>
164	>	/**
165	>	* repeated weakCompareAndSet succeeds in changing value when equal
166	>	* to expected
167	>	*/
168	>	public void testWeakCompareAndSet() {
169	>	AtomicReferenceArray aa = new AtomicReferenceArray(SIZE);
170	>	for (int i = 0; i < SIZE; i++) {
171	>	aa.set(i, one);
172	>	while (!aa.weakCompareAndSet(i, one, two));
173	>	while (!aa.weakCompareAndSet(i, two, m4));
174	>	assertSame(m4, aa.get(i));
175	>	while (!aa.weakCompareAndSet(i, m4, seven));
176	>	assertSame(seven, aa.get(i));
177	>	}
178	>	}
179	>
180	>	/**
181	>	* getAndSet returns previous value and sets to given value at given index
182	>	*/
183	>	public void testGetAndSet() {
184	>	AtomicReferenceArray aa = new AtomicReferenceArray(SIZE);
185	>	for (int i = 0; i < SIZE; i++) {
186	>	aa.set(i, one);
187	>	assertSame(one, aa.getAndSet(i, zero));
188	>	assertSame(zero, aa.getAndSet(i, m10));
189	>	assertSame(m10, aa.getAndSet(i, one));
190	>	}
191	>	}
192	>
193	>	/**
194	>	* a deserialized serialized array holds same values
195	>	*/
196	>	public void testSerialization() throws Exception {
197	>	AtomicReferenceArray x = new AtomicReferenceArray(SIZE);
198	>	for (int i = 0; i < SIZE; i++) {
199	>	x.set(i, new Integer(-i));
200	>	}
201	>	AtomicReferenceArray y = serialClone(x);
202	>	assertTrue(x != y);
203	>	assertEquals(x.length(), y.length());
204	>	for (int i = 0; i < SIZE; i++) {
205	>	assertEquals(x.get(i), y.get(i));
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> aa = new AtomicReferenceArray<Integer>(a);
215	>	assertEquals(Arrays.toString(a), aa.toString());
216		}
111	–
217		}

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