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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 1.32 by jsr166, Sat Apr 25 04:55:30 2015 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.*;
10	<	import java.io.*;
11	<
12	<	public class AtomicReferenceArrayTest extends JSR166TestCase
13	<	{
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	<	}
9	>	import java.util.Arrays;
10	>	import java.util.concurrent.atomic.AtomicReferenceArray;
11
12	<	public void testConstructor(){
13	<	AtomicReferenceArray<Integer> ai = new AtomicReferenceArray<Integer>(SIZE);
23	<	for (int i = 0; i < SIZE; ++i) {
24	<	assertNull(ai.get(i));
25	<	}
26	<	}
27	<
28	<	public void testGetSet(){
29	<	AtomicReferenceArray ai = new AtomicReferenceArray(SIZE);
30	<	for (int i = 0; i < SIZE; ++i) {
31	<	ai.set(i, one);
32	<	assertEquals(one,ai.get(i));
33	<	ai.set(i, two);
34	<	assertEquals(two,ai.get(i));
35	<	ai.set(i, m3);
36	<	assertEquals(m3,ai.get(i));
37	<	}
38	<	}
12	>	import junit.framework.Test;
13	>	import junit.framework.TestSuite;
14
15	<	public void testCompareAndSet(){
16	<	AtomicReferenceArray ai = new AtomicReferenceArray(SIZE);
17	<	for (int i = 0; i < SIZE; ++i) {
43	<	ai.set(i, one);
44	<	assertTrue(ai.compareAndSet(i, one,two));
45	<	assertTrue(ai.compareAndSet(i, two,m4));
46	<	assertEquals(m4,ai.get(i));
47	<	assertFalse(ai.compareAndSet(i, m5,seven));
48	<	assertFalse((seven.equals(ai.get(i))));
49	<	assertTrue(ai.compareAndSet(i, m4,seven));
50	<	assertEquals(seven,ai.get(i));
51	<	}
15	>	public class AtomicReferenceArrayTest extends JSR166TestCase {
16	>	public static void main(String[] args) {
17	>	main(suite(), args);
18		}
19	<
20	<	public void testWeakCompareAndSet(){
55	<	AtomicReferenceArray ai = new AtomicReferenceArray(SIZE);
56	<	for (int i = 0; i < SIZE; ++i) {
57	<	ai.set(i, one);
58	<	while(!ai.weakCompareAndSet(i, one,two));
59	<	while(!ai.weakCompareAndSet(i, two,m4));
60	<	assertEquals(m4,ai.get(i));
61	<	while(!ai.weakCompareAndSet(i, m4,seven));
62	<	assertEquals(seven,ai.get(i));
63	<	}
19	>	public static Test suite() {
20	>	return new TestSuite(AtomicReferenceArrayTest.class);
21		}
22
23	<	public void testGetAndSet(){
24	<	AtomicReferenceArray ai = new AtomicReferenceArray(SIZE);
25	<	for (int i = 0; i < SIZE; ++i) {
26	<	ai.set(i, one);
27	<	assertEquals(one,ai.getAndSet(i,zero));
28	<	assertEquals(0,ai.getAndSet(i,m10));
29	<	assertEquals(m10,ai.getAndSet(i,one));
23	>	/**
24	>	* constructor creates array of given size with all elements null
25	>	*/
26	>	public void testConstructor() {
27	>	AtomicReferenceArray<Integer> aa = new AtomicReferenceArray<Integer>(SIZE);
28	>	for (int i = 0; i < SIZE; i++) {
29	>	assertNull(aa.get(i));
30		}
31		}
32
33	<	public void testSerialization() {
34	<	AtomicReferenceArray l = new AtomicReferenceArray(SIZE);
35	<	for (int i = 0; i < SIZE; ++i) {
36	<	l.set(i, new Integer(-i));
80	<	}
81	<
33	>	/**
34	>	* constructor with null array throws NPE
35	>	*/
36	>	public void testConstructor2NPE() {
37		try {
38	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
39	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
40	<	out.writeObject(l);
41	<	out.close();
42	<
43	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
44	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
45	<	AtomicReferenceArray r = (AtomicReferenceArray) in.readObject();
46	<	assertEquals(l.length(), r.length());
47	<	for (int i = 0; i < SIZE; ++i) {
48	<	assertEquals(r.get(i), l.get(i));
49	<	}
50	<	} catch(Exception e){
51	<	e.printStackTrace();
52	<	fail("unexpected exception");
53	<	}
38	>	Integer[] a = null;
39	>	new AtomicReferenceArray<Integer>(a);
40	>	shouldThrow();
41	>	} catch (NullPointerException success) {}
42	>	}
43	>
44	>	/**
45	>	* constructor with array is of same size and has all elements
46	>	*/
47	>	public void testConstructor2() {
48	>	Integer[] a = { two, one, three, four, seven };
49	>	AtomicReferenceArray<Integer> aa = new AtomicReferenceArray<Integer>(a);
50	>	assertEquals(a.length, aa.length());
51	>	for (int i = 0; i < a.length; i++)
52	>	assertEquals(a[i], aa.get(i));
53	>	}
54	>
55	>	/**
56	>	* Initialize AtomicReferenceArray<Class> with SubClass[]
57	>	*/
58	>	public void testConstructorSubClassArray() {
59	>	Integer[] a = { two, one, three, four, seven };
60	>	AtomicReferenceArray<Number> aa = new AtomicReferenceArray<Number>(a);
61	>	assertEquals(a.length, aa.length());
62	>	for (int i = 0; i < a.length; i++) {
63	>	assertSame(a[i], aa.get(i));
64	>	Long x = Long.valueOf(i);
65	>	aa.set(i, x);
66	>	assertSame(x, aa.get(i));
67	>	}
68	>	}
69	>
70	>	/**
71	>	* get and set for out of bound indices throw IndexOutOfBoundsException
72	>	*/
73	>	public void testIndexing() {
74	>	AtomicReferenceArray<Integer> aa = new AtomicReferenceArray<Integer>(SIZE);
75	>	for (int index : new int[] { -1, SIZE }) {
76	>	try {
77	>	aa.get(index);
78	>	shouldThrow();
79	>	} catch (IndexOutOfBoundsException success) {}
80	>	try {
81	>	aa.set(index, null);
82	>	shouldThrow();
83	>	} catch (IndexOutOfBoundsException success) {}
84	>	try {
85	>	aa.lazySet(index, null);
86	>	shouldThrow();
87	>	} catch (IndexOutOfBoundsException success) {}
88	>	try {
89	>	aa.compareAndSet(index, null, null);
90	>	shouldThrow();
91	>	} catch (IndexOutOfBoundsException success) {}
92	>	try {
93	>	aa.weakCompareAndSet(index, null, null);
94	>	shouldThrow();
95	>	} catch (IndexOutOfBoundsException success) {}
96	>	}
97	>	}
98	>
99	>	/**
100	>	* get returns the last value set at index
101	>	*/
102	>	public void testGetSet() {
103	>	AtomicReferenceArray aa = new AtomicReferenceArray(SIZE);
104	>	for (int i = 0; i < SIZE; i++) {
105	>	aa.set(i, one);
106	>	assertSame(one, aa.get(i));
107	>	aa.set(i, two);
108	>	assertSame(two, aa.get(i));
109	>	aa.set(i, m3);
110	>	assertSame(m3, aa.get(i));
111	>	}
112	>	}
113	>
114	>	/**
115	>	* get returns the last value lazySet at index by same thread
116	>	*/
117	>	public void testGetLazySet() {
118	>	AtomicReferenceArray aa = new AtomicReferenceArray(SIZE);
119	>	for (int i = 0; i < SIZE; i++) {
120	>	aa.lazySet(i, one);
121	>	assertSame(one, aa.get(i));
122	>	aa.lazySet(i, two);
123	>	assertSame(two, aa.get(i));
124	>	aa.lazySet(i, m3);
125	>	assertSame(m3, aa.get(i));
126	>	}
127	>	}
128	>
129	>	/**
130	>	* compareAndSet succeeds in changing value if equal to expected else fails
131	>	*/
132	>	public void testCompareAndSet() {
133	>	AtomicReferenceArray aa = new AtomicReferenceArray(SIZE);
134	>	for (int i = 0; i < SIZE; i++) {
135	>	aa.set(i, one);
136	>	assertTrue(aa.compareAndSet(i, one, two));
137	>	assertTrue(aa.compareAndSet(i, two, m4));
138	>	assertSame(m4, aa.get(i));
139	>	assertFalse(aa.compareAndSet(i, m5, seven));
140	>	assertSame(m4, aa.get(i));
141	>	assertTrue(aa.compareAndSet(i, m4, seven));
142	>	assertSame(seven, aa.get(i));
143	>	}
144	>	}
145	>
146	>	/**
147	>	* compareAndSet in one thread enables another waiting for value
148	>	* to succeed
149	>	*/
150	>	public void testCompareAndSetInMultipleThreads() throws InterruptedException {
151	>	final AtomicReferenceArray a = new AtomicReferenceArray(1);
152	>	a.set(0, one);
153	>	Thread t = new Thread(new CheckedRunnable() {
154	>	public void realRun() {
155	>	while (!a.compareAndSet(0, two, three))
156	>	Thread.yield();
157	>	}});
158	>
159	>	t.start();
160	>	assertTrue(a.compareAndSet(0, one, two));
161	>	t.join(LONG_DELAY_MS);
162	>	assertFalse(t.isAlive());
163	>	assertSame(three, a.get(0));
164	>	}
165	>
166	>	/**
167	>	* repeated weakCompareAndSet succeeds in changing value when equal
168	>	* to expected
169	>	*/
170	>	public void testWeakCompareAndSet() {
171	>	AtomicReferenceArray aa = new AtomicReferenceArray(SIZE);
172	>	for (int i = 0; i < SIZE; i++) {
173	>	aa.set(i, one);
174	>	do {} while (!aa.weakCompareAndSet(i, one, two));
175	>	do {} while (!aa.weakCompareAndSet(i, two, m4));
176	>	assertSame(m4, aa.get(i));
177	>	do {} while (!aa.weakCompareAndSet(i, m4, seven));
178	>	assertSame(seven, aa.get(i));
179	>	}
180	>	}
181	>
182	>	/**
183	>	* getAndSet returns previous value and sets to given value at given index
184	>	*/
185	>	public void testGetAndSet() {
186	>	AtomicReferenceArray aa = new AtomicReferenceArray(SIZE);
187	>	for (int i = 0; i < SIZE; i++) {
188	>	aa.set(i, one);
189	>	assertSame(one, aa.getAndSet(i, zero));
190	>	assertSame(zero, aa.getAndSet(i, m10));
191	>	assertSame(m10, aa.getAndSet(i, one));
192	>	}
193	>	}
194	>
195	>	/**
196	>	* a deserialized serialized array holds same values
197	>	*/
198	>	public void testSerialization() throws Exception {
199	>	AtomicReferenceArray x = new AtomicReferenceArray(SIZE);
200	>	for (int i = 0; i < SIZE; i++) {
201	>	x.set(i, new Integer(-i));
202	>	}
203	>	AtomicReferenceArray y = serialClone(x);
204	>	assertNotSame(x, y);
205	>	assertEquals(x.length(), y.length());
206	>	for (int i = 0; i < SIZE; i++) {
207	>	assertEquals(x.get(i), y.get(i));
208	>	}
209	>	}
210	>
211	>	/**
212	>	* toString returns current value.
213	>	*/
214	>	public void testToString() {
215	>	Integer[] a = { two, one, three, four, seven };
216	>	AtomicReferenceArray<Integer> aa = new AtomicReferenceArray<Integer>(a);
217	>	assertEquals(Arrays.toString(a), aa.toString());
218		}
100	–
219		}

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