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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 1.21 by jsr166, Tue May 31 16:16:23 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) {
21	>	/**
22	>	* constructor creates array of given size with all elements null
23	>	*/
24	>	public void testConstructor() {
25	>	AtomicReferenceArray<Integer> ai = new AtomicReferenceArray<Integer>(SIZE);
26	>	for (int i = 0; i < SIZE; ++i) {
27		assertNull(ai.get(i));
28		}
29		}
30
31	<	public void testGetSet(){
32	<	AtomicReferenceArray ai = new AtomicReferenceArray(N);
33	<	for (int i = 0; i < N; ++i) {
31	>	/**
32	>	* constructor with null array throws NPE
33	>	*/
34	>	public void testConstructor2NPE() {
35	>	try {
36	>	Integer[] a = null;
37	>	AtomicReferenceArray<Integer> ai = 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> ai = new AtomicReferenceArray<Integer>(a);
48	>	assertEquals(a.length, ai.length());
49	>	for (int i = 0; i < a.length; ++i)
50	>	assertEquals(a[i], ai.get(i));
51	>	}
52	>
53	>	/**
54	>	* get and set for out of bound indices throw IndexOutOfBoundsException
55	>	*/
56	>	public void testIndexing() {
57	>	AtomicReferenceArray<Integer> ai = new AtomicReferenceArray<Integer>(SIZE);
58	>	try {
59	>	ai.get(SIZE);
60	>	shouldThrow();
61	>	} catch (IndexOutOfBoundsException success) {
62	>	}
63	>	try {
64	>	ai.get(-1);
65	>	shouldThrow();
66	>	} catch (IndexOutOfBoundsException success) {
67	>	}
68	>	try {
69	>	ai.set(SIZE, null);
70	>	shouldThrow();
71	>	} catch (IndexOutOfBoundsException success) {
72	>	}
73	>	try {
74	>	ai.set(-1, null);
75	>	shouldThrow();
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));
87	>	assertSame(one,ai.get(i));
88		ai.set(i, two);
89	<	assertEquals(two,ai.get(i));
89	>	assertSame(two,ai.get(i));
90		ai.set(i, m3);
91	<	assertEquals(m3,ai.get(i));
91	>	assertSame(m3,ai.get(i));
92	>	}
93	>	}
94	>
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	>	assertSame(one,ai.get(i));
103	>	ai.lazySet(i, two);
104	>	assertSame(two,ai.get(i));
105	>	ai.lazySet(i, m3);
106	>	assertSame(m3,ai.get(i));
107		}
108		}
109
110	<	public void testCompareAndSet(){
111	<	AtomicReferenceArray ai = new AtomicReferenceArray(N);
112	<	for (int i = 0; i < N; ++i) {
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));
119	<	assertEquals(m4,ai.get(i));
119	>	assertSame(m4,ai.get(i));
120		assertFalse(ai.compareAndSet(i, m5,seven));
121	<	assertFalse((seven.equals(ai.get(i))));
121	>	assertSame(m4,ai.get(i));
122		assertTrue(ai.compareAndSet(i, m4,seven));
123	<	assertEquals(seven,ai.get(i));
123	>	assertSame(seven,ai.get(i));
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() throws InterruptedException {
132	>	final AtomicReferenceArray a = new AtomicReferenceArray(1);
133	>	a.set(0, one);
134	>	Thread t = new Thread(new CheckedRunnable() {
135	>	public void realRun() {
136	>	while (!a.compareAndSet(0, two, three))
137	>	Thread.yield();
138	>	}});
139	>
140	>	t.start();
141	>	assertTrue(a.compareAndSet(0, one, two));
142	>	t.join(LONG_DELAY_MS);
143	>	assertFalse(t.isAlive());
144	>	assertSame(a.get(0), three);
145	>	}
146	>
147	>	/**
148	>	* repeated weakCompareAndSet succeeds in changing value when equal
149	>	* to expected
150	>	*/
151	>	public void testWeakCompareAndSet() {
152	>	AtomicReferenceArray ai = new AtomicReferenceArray(SIZE);
153	>	for (int i = 0; i < SIZE; ++i) {
154		ai.set(i, one);
155	<	while(!ai.weakCompareAndSet(i, one,two));
156	<	while(!ai.weakCompareAndSet(i, two,m4));
157	<	assertEquals(m4,ai.get(i));
158	<	while(!ai.weakCompareAndSet(i, m4,seven));
159	<	assertEquals(seven,ai.get(i));
155	>	while (!ai.weakCompareAndSet(i, one,two));
156	>	while (!ai.weakCompareAndSet(i, two,m4));
157	>	assertSame(m4,ai.get(i));
158	>	while (!ai.weakCompareAndSet(i, m4,seven));
159	>	assertSame(seven,ai.get(i));
160		}
161		}
162
163	<	public void testGetAndSet(){
164	<	AtomicReferenceArray ai = new AtomicReferenceArray(N);
165	<	for (int i = 0; i < N; ++i) {
163	>	/**
164	>	* getAndSet returns previous value and sets to given value at given index
165	>	*/
166	>	public void testGetAndSet() {
167	>	AtomicReferenceArray ai = new AtomicReferenceArray(SIZE);
168	>	for (int i = 0; i < SIZE; ++i) {
169		ai.set(i, one);
170	<	assertEquals(one,ai.getAndSet(i,zero));
171	<	assertEquals(0,ai.getAndSet(i,m10));
172	<	assertEquals(m10,ai.getAndSet(i,one));
170	>	assertSame(one,ai.getAndSet(i,zero));
171	>	assertSame(zero,ai.getAndSet(i,m10));
172	>	assertSame(m10,ai.getAndSet(i,one));
173		}
174		}
175
176	<	public void testSerialization() {
177	<	AtomicReferenceArray l = new AtomicReferenceArray(10);
178	<	for (int i = 0; i < 10; ++i) {
179	<	l.set(i, new Integer(-i));
180	<	}
181	<
182	<	try {
183	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
184	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
185	<	out.writeObject(l);
186	<	out.close();
187	<
188	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
100	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
101	<	AtomicReferenceArray r = (AtomicReferenceArray) in.readObject();
102	<	assertEquals(l.length(), r.length());
103	<	for (int i = 0; i < 10; ++i) {
104	<	assertEquals(r.get(i), l.get(i));
105	<	}
106	<	} catch(Exception e){
107	<	e.printStackTrace();
108	<	fail("unexpected exception");
176	>	/**
177	>	* a deserialized serialized array holds same values
178	>	*/
179	>	public void testSerialization() throws Exception {
180	>	AtomicReferenceArray x = new AtomicReferenceArray(SIZE);
181	>	for (int i = 0; i < SIZE; i++) {
182	>	x.set(i, new Integer(-i));
183	>	}
184	>	AtomicReferenceArray y = serialClone(x);
185	>	assertTrue(x != y);
186	>	assertEquals(x.length(), y.length());
187	>	for (int i = 0; i < SIZE; i++) {
188	>	assertEquals(x.get(i), y.get(i));
189		}
190		}
191
192	+	/**
193	+	* toString returns current value.
194	+	*/
195	+	public void testToString() {
196	+	Integer[] a = { two, one, three, four, seven};
197	+	AtomicReferenceArray<Integer> ai = new AtomicReferenceArray<Integer>(a);
198	+	assertEquals(Arrays.toString(a), ai.toString());
199	+	}
200		}

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