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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 1.24 by jsr166, Fri Jun 10 20:01:21 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	>	* 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> ai = new AtomicReferenceArray<Integer>(SIZE);
73	>	try {
74	>	ai.get(SIZE);
75	>	shouldThrow();
76	>	} catch (IndexOutOfBoundsException success) {
77	>	}
78	>	try {
79	>	ai.get(-1);
80	>	shouldThrow();
81	>	} catch (IndexOutOfBoundsException success) {
82	>	}
83	>	try {
84	>	ai.set(SIZE, null);
85	>	shouldThrow();
86	>	} catch (IndexOutOfBoundsException success) {
87	>	}
88	>	try {
89	>	ai.set(-1, null);
90	>	shouldThrow();
91	>	} catch (IndexOutOfBoundsException success) {
92	>	}
93	>	}
94	>
95	>	/**
96	>	* get returns the last value set at index
97	>	*/
98	>	public void testGetSet() {
99	>	AtomicReferenceArray ai = new AtomicReferenceArray(SIZE);
100	>	for (int i = 0; i < SIZE; ++i) {
101		ai.set(i, one);
102	<	assertEquals(one,ai.get(i));
102	>	assertSame(one, ai.get(i));
103		ai.set(i, two);
104	<	assertEquals(two,ai.get(i));
104	>	assertSame(two, ai.get(i));
105		ai.set(i, m3);
106	<	assertEquals(m3,ai.get(i));
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) {
113	<	ai.set(i, one);
114	<	assertTrue(ai.compareAndSet(i, one,two));
115	<	assertTrue(ai.compareAndSet(i, two,m4));
116	<	assertEquals(m4,ai.get(i));
117	<	assertFalse(ai.compareAndSet(i, m5,seven));
118	<	assertFalse((seven.equals(ai.get(i))));
119	<	assertTrue(ai.compareAndSet(i, m4,seven));
120	<	assertEquals(seven,ai.get(i));
110	>	/**
111	>	* get returns the last value lazySet at index by same thread
112	>	*/
113	>	public void testGetLazySet() {
114	>	AtomicReferenceArray ai = new AtomicReferenceArray(SIZE);
115	>	for (int i = 0; i < SIZE; ++i) {
116	>	ai.lazySet(i, one);
117	>	assertSame(one, ai.get(i));
118	>	ai.lazySet(i, two);
119	>	assertSame(two, ai.get(i));
120	>	ai.lazySet(i, m3);
121	>	assertSame(m3, ai.get(i));
122		}
123		}
124
125	<	public void testWeakCompareAndSet(){
126	<	AtomicReferenceArray ai = new AtomicReferenceArray(N);
127	<	for (int i = 0; i < N; ++i) {
125	>	/**
126	>	* compareAndSet succeeds in changing value if equal to expected else fails
127	>	*/
128	>	public void testCompareAndSet() {
129	>	AtomicReferenceArray ai = new AtomicReferenceArray(SIZE);
130	>	for (int i = 0; i < SIZE; ++i) {
131		ai.set(i, one);
132	<	while(!ai.weakCompareAndSet(i, one,two));
133	<	while(!ai.weakCompareAndSet(i, two,m4));
134	<	assertEquals(m4,ai.get(i));
135	<	while(!ai.weakCompareAndSet(i, m4,seven));
136	<	assertEquals(seven,ai.get(i));
132	>	assertTrue(ai.compareAndSet(i, one, two));
133	>	assertTrue(ai.compareAndSet(i, two, m4));
134	>	assertSame(m4, ai.get(i));
135	>	assertFalse(ai.compareAndSet(i, m5, seven));
136	>	assertSame(m4, ai.get(i));
137	>	assertTrue(ai.compareAndSet(i, m4, seven));
138	>	assertSame(seven, ai.get(i));
139		}
140		}
141
142	<	public void testGetAndSet(){
143	<	AtomicReferenceArray ai = new AtomicReferenceArray(N);
144	<	for (int i = 0; i < N; ++i) {
142	>	/**
143	>	* compareAndSet in one thread enables another waiting for value
144	>	* to succeed
145	>	*/
146	>	public void testCompareAndSetInMultipleThreads() throws InterruptedException {
147	>	final AtomicReferenceArray a = new AtomicReferenceArray(1);
148	>	a.set(0, one);
149	>	Thread t = new Thread(new CheckedRunnable() {
150	>	public void realRun() {
151	>	while (!a.compareAndSet(0, two, three))
152	>	Thread.yield();
153	>	}});
154	>
155	>	t.start();
156	>	assertTrue(a.compareAndSet(0, one, two));
157	>	t.join(LONG_DELAY_MS);
158	>	assertFalse(t.isAlive());
159	>	assertSame(a.get(0), three);
160	>	}
161	>
162	>	/**
163	>	* repeated weakCompareAndSet succeeds in changing value when equal
164	>	* to expected
165	>	*/
166	>	public void testWeakCompareAndSet() {
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	>	while (!ai.weakCompareAndSet(i, one, two));
171	>	while (!ai.weakCompareAndSet(i, two, m4));
172	>	assertSame(m4, ai.get(i));
173	>	while (!ai.weakCompareAndSet(i, m4, seven));
174	>	assertSame(seven, ai.get(i));
175		}
176		}
177
178	<	public void testSerialization() {
179	<	AtomicReferenceArray l = new AtomicReferenceArray(10);
180	<	for (int i = 0; i < 10; ++i) {
181	<	l.set(i, new Integer(-i));
178	>	/**
179	>	* getAndSet returns previous value and sets to given value at given index
180	>	*/
181	>	public void testGetAndSet() {
182	>	AtomicReferenceArray ai = new AtomicReferenceArray(SIZE);
183	>	for (int i = 0; i < SIZE; ++i) {
184	>	ai.set(i, one);
185	>	assertSame(one, ai.getAndSet(i, zero));
186	>	assertSame(zero, ai.getAndSet(i, m10));
187	>	assertSame(m10, ai.getAndSet(i, one));
188		}
189	+	}
190
191	<	try {
192	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
193	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
194	<	out.writeObject(l);
195	<	out.close();
196	<
197	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
198	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
199	<	AtomicReferenceArray r = (AtomicReferenceArray) in.readObject();
200	<	assertEquals(l.length(), r.length());
201	<	for (int i = 0; i < 10; ++i) {
202	<	assertEquals(r.get(i), l.get(i));
203	<	}
106	<	} catch(Exception e){
107	<	e.printStackTrace();
108	<	fail("unexpected exception");
191	>	/**
192	>	* a deserialized serialized array holds same values
193	>	*/
194	>	public void testSerialization() throws Exception {
195	>	AtomicReferenceArray x = new AtomicReferenceArray(SIZE);
196	>	for (int i = 0; i < SIZE; i++) {
197	>	x.set(i, new Integer(-i));
198	>	}
199	>	AtomicReferenceArray y = serialClone(x);
200	>	assertTrue(x != y);
201	>	assertEquals(x.length(), y.length());
202	>	for (int i = 0; i < SIZE; i++) {
203	>	assertEquals(x.get(i), y.get(i));
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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