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

Comparing jsr166/src/test/tck/AtomicReferenceArrayTest.java (file contents):
Revision 1.5 by dl, Thu Sep 25 11:02:41 2003 UTC vs.
Revision 1.15 by jsr166, Tue Nov 17 02:53:14 2009 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	+	import java.util.*;
13
14	<	public class AtomicReferenceArrayTest extends JSR166TestCase
13	<	{
14	>	public class AtomicReferenceArrayTest extends JSR166TestCase {
15		public static void main (String[] args) {
16		junit.textui.TestRunner.run (suite());
17		}
#	Line 21 | Line 22 | public class AtomicReferenceArrayTest ex
22		/**
23		* constructor creates array of given size with all elements null
24		*/
25	<	public void testConstructor(){
25	>	public void testConstructor() {
26		AtomicReferenceArray<Integer> ai = new AtomicReferenceArray<Integer>(SIZE);
27		for (int i = 0; i < SIZE; ++i) {
28		assertNull(ai.get(i));
#	Line 29 | Line 30 | public class AtomicReferenceArrayTest ex
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	+	shouldThrow();
40	+	} catch (NullPointerException success) {}
41	+	}
42	+
43	+	/**
44	+	* constructor with array is of same size and has all elements
45	+	*/
46	+	public void testConstructor2() {
47	+	Integer[] a = { two, one, three, four, seven};
48	+	AtomicReferenceArray<Integer> ai = new AtomicReferenceArray<Integer>(a);
49	+	assertEquals(a.length, ai.length());
50	+	for (int i = 0; i < a.length; ++i)
51	+	assertEquals(a[i], ai.get(i));
52	+	}
53	+
54	+
55	+	/**
56		* get and set for out of bound indices throw IndexOutOfBoundsException
57		*/
58	<	public void testIndexing(){
58	>	public void testIndexing() {
59		AtomicReferenceArray<Integer> ai = new AtomicReferenceArray<Integer>(SIZE);
60		try {
61		ai.get(SIZE);
62	<	} catch(IndexOutOfBoundsException success){
62	>	shouldThrow();
63	>	} catch (IndexOutOfBoundsException success) {
64		}
65		try {
66		ai.get(-1);
67	<	} catch(IndexOutOfBoundsException success){
67	>	shouldThrow();
68	>	} catch (IndexOutOfBoundsException success) {
69		}
70		try {
71		ai.set(SIZE, null);
72	<	} catch(IndexOutOfBoundsException success){
72	>	shouldThrow();
73	>	} catch (IndexOutOfBoundsException success) {
74		}
75		try {
76		ai.set(-1, null);
77	<	} catch(IndexOutOfBoundsException success){
77	>	shouldThrow();
78	>	} catch (IndexOutOfBoundsException success) {
79		}
80		}
81
82		/**
83		* get returns the last value set at index
84		*/
85	<	public void testGetSet(){
86	<	AtomicReferenceArray ai = new AtomicReferenceArray(SIZE);
85	>	public void testGetSet() {
86	>	AtomicReferenceArray ai = new AtomicReferenceArray(SIZE);
87		for (int i = 0; i < SIZE; ++i) {
88		ai.set(i, one);
89		assertEquals(one,ai.get(i));
#	Line 67 | Line 95 | public class AtomicReferenceArrayTest ex
95		}
96
97		/**
98	+	* get returns the last value lazySet at index by same thread
99	+	*/
100	+	public void testGetLazySet() {
101	+	AtomicReferenceArray ai = new AtomicReferenceArray(SIZE);
102	+	for (int i = 0; i < SIZE; ++i) {
103	+	ai.lazySet(i, one);
104	+	assertEquals(one,ai.get(i));
105	+	ai.lazySet(i, two);
106	+	assertEquals(two,ai.get(i));
107	+	ai.lazySet(i, m3);
108	+	assertEquals(m3,ai.get(i));
109	+	}
110	+	}
111	+
112	+	/**
113		* compareAndSet succeeds in changing value if equal to expected else fails
114		*/
115	<	public void testCompareAndSet(){
116	<	AtomicReferenceArray ai = new AtomicReferenceArray(SIZE);
115	>	public void testCompareAndSet() {
116	>	AtomicReferenceArray ai = new AtomicReferenceArray(SIZE);
117		for (int i = 0; i < SIZE; ++i) {
118		ai.set(i, one);
119		assertTrue(ai.compareAndSet(i, one,two));
#	Line 87 | Line 130 | public class AtomicReferenceArrayTest ex
130		* compareAndSet in one thread enables another waiting for value
131		* to succeed
132		*/
133	<	public void testCompareAndSetInMultipleThreads() {
133	>	public void testCompareAndSetInMultipleThreads() throws InterruptedException {
134		final AtomicReferenceArray a = new AtomicReferenceArray(1);
135		a.set(0, one);
136		Thread t = new Thread(new Runnable() {
137		public void run() {
138	<	while(!a.compareAndSet(0, two, three)) Thread.yield();
138	>	while (!a.compareAndSet(0, two, three)) Thread.yield();
139		}});
140	<	try {
141	<	t.start();
142	<	assertTrue(a.compareAndSet(0, one, two));
143	<	t.join(LONG_DELAY_MS);
144	<	assertFalse(t.isAlive());
145	<	assertEquals(a.get(0), three);
103	<	}
104	<	catch(Exception e) {
105	<	unexpectedException();
106	<	}
140	>
141	>	t.start();
142	>	assertTrue(a.compareAndSet(0, one, two));
143	>	t.join(LONG_DELAY_MS);
144	>	assertFalse(t.isAlive());
145	>	assertEquals(a.get(0), three);
146		}
147
148		/**
149		* repeated weakCompareAndSet succeeds in changing value when equal
150	<	* to expected
150	>	* to expected
151		*/
152	<	public void testWeakCompareAndSet(){
153	<	AtomicReferenceArray ai = new AtomicReferenceArray(SIZE);
152	>	public void testWeakCompareAndSet() {
153	>	AtomicReferenceArray ai = new AtomicReferenceArray(SIZE);
154		for (int i = 0; i < SIZE; ++i) {
155		ai.set(i, one);
156	<	while(!ai.weakCompareAndSet(i, one,two));
157	<	while(!ai.weakCompareAndSet(i, two,m4));
156	>	while (!ai.weakCompareAndSet(i, one,two));
157	>	while (!ai.weakCompareAndSet(i, two,m4));
158		assertEquals(m4,ai.get(i));
159	<	while(!ai.weakCompareAndSet(i, m4,seven));
159	>	while (!ai.weakCompareAndSet(i, m4,seven));
160		assertEquals(seven,ai.get(i));
161		}
162		}
#	Line 125 | Line 164 | public class AtomicReferenceArrayTest ex
164		/**
165		* getAndSet returns previous value and sets to given value at given index
166		*/
167	<	public void testGetAndSet(){
168	<	AtomicReferenceArray ai = new AtomicReferenceArray(SIZE);
167	>	public void testGetAndSet() {
168	>	AtomicReferenceArray ai = new AtomicReferenceArray(SIZE);
169		for (int i = 0; i < SIZE; ++i) {
170		ai.set(i, one);
171		assertEquals(one,ai.getAndSet(i,zero));
#	Line 138 | Line 177 | public class AtomicReferenceArrayTest ex
177		/**
178		* a deserialized serialized array holds same values
179		*/
180	<	public void testSerialization() {
181	<	AtomicReferenceArray l = new AtomicReferenceArray(SIZE);
180	>	public void testSerialization() throws Exception {
181	>	AtomicReferenceArray l = new AtomicReferenceArray(SIZE);
182		for (int i = 0; i < SIZE; ++i) {
183		l.set(i, new Integer(-i));
184		}
185
186	<	try {
187	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
188	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
189	<	out.writeObject(l);
190	<	out.close();
191	<
192	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
193	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
194	<	AtomicReferenceArray r = (AtomicReferenceArray) in.readObject();
195	<	assertEquals(l.length(), r.length());
196	<	for (int i = 0; i < SIZE; ++i) {
158	<	assertEquals(r.get(i), l.get(i));
159	<	}
160	<	} catch(Exception e){
161	<	unexpectedException();
186	>	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
187	>	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
188	>	out.writeObject(l);
189	>	out.close();
190	>
191	>	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
192	>	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
193	>	AtomicReferenceArray r = (AtomicReferenceArray) in.readObject();
194	>	assertEquals(l.length(), r.length());
195	>	for (int i = 0; i < SIZE; ++i) {
196	>	assertEquals(r.get(i), l.get(i));
197		}
198		}
199
200	+
201	+	/**
202	+	* toString returns current value.
203	+	*/
204	+	public void testToString() {
205	+	Integer[] a = { two, one, three, four, seven};
206	+	AtomicReferenceArray<Integer> ai = new AtomicReferenceArray<Integer>(a);
207	+	assertEquals(Arrays.toString(a), ai.toString());
208	+	}
209		}

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