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Comparing jsr166/src/test/tck/AtomicReferenceArrayTest.java (file contents):
Revision 1.6 by dl, Sat Dec 27 19:26:43 2003 UTC vs.
Revision 1.31 by jsr166, Sun Feb 22 04:34:44 2015 UTC

#	Line 1 | Line 1
1		/*
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.
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.*;
12	<
13	<	public class AtomicReferenceArrayTest extends JSR166TestCase
14	<	{
15	<	public static void main (String[] args) {
16	<	junit.textui.TestRunner.run (suite());
9	>	import java.util.Arrays;
10	>	import java.util.concurrent.atomic.AtomicReferenceArray;
11	>
12	>	import junit.framework.Test;
13	>	import junit.framework.TestSuite;
14	>
15	>	public class AtomicReferenceArrayTest extends JSR166TestCase {
16	>	public static void main(String[] args) {
17	>	junit.textui.TestRunner.run(suite());
18		}
19		public static Test suite() {
20		return new TestSuite(AtomicReferenceArrayTest.class);
#	Line 22 | Line 23 | public class AtomicReferenceArrayTest ex
23		/**
24		* constructor creates array of given size with all elements null
25		*/
26	<	public void testConstructor(){
27	<	AtomicReferenceArray<Integer> ai = new AtomicReferenceArray<Integer>(SIZE);
28	<	for (int i = 0; i < SIZE; ++i) {
29	<	assertNull(ai.get(i));
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		/**
34	<	* get and set for out of bound indices throw IndexOutOfBoundsException
34	>	* constructor with null array throws NPE
35		*/
36	<	public void testIndexing(){
36	<	AtomicReferenceArray<Integer> ai = new AtomicReferenceArray<Integer>(SIZE);
37	<	try {
38	<	ai.get(SIZE);
39	<	} catch(IndexOutOfBoundsException success){
40	<	}
36	>	public void testConstructor2NPE() {
37		try {
38	<	ai.get(-1);
39	<	} catch(IndexOutOfBoundsException success){
40	<	}
41	<	try {
42	<	ai.set(SIZE, null);
43	<	} catch(IndexOutOfBoundsException success){
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	<	try {
69	<	ai.set(-1, null);
70	<	} catch(IndexOutOfBoundsException success){
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 ai = new AtomicReferenceArray(SIZE);
104	<	for (int i = 0; i < SIZE; ++i) {
105	<	ai.set(i, one);
106	<	assertEquals(one,ai.get(i));
107	<	ai.set(i, two);
108	<	assertEquals(two,ai.get(i));
109	<	ai.set(i, m3);
110	<	assertEquals(m3,ai.get(i));
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 ai = new AtomicReferenceArray(SIZE);
134	<	for (int i = 0; i < SIZE; ++i) {
135	<	ai.set(i, one);
136	<	assertTrue(ai.compareAndSet(i, one,two));
137	<	assertTrue(ai.compareAndSet(i, two,m4));
138	<	assertEquals(m4,ai.get(i));
139	<	assertFalse(ai.compareAndSet(i, m5,seven));
140	<	assertFalse((seven.equals(ai.get(i))));
141	<	assertTrue(ai.compareAndSet(i, m4,seven));
142	<	assertEquals(seven,ai.get(i));
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
#	Line 88 | Line 147 | public class AtomicReferenceArrayTest ex
147		* compareAndSet in one thread enables another waiting for value
148		* to succeed
149		*/
150	<	public void testCompareAndSetInMultipleThreads() {
150	>	public void testCompareAndSetInMultipleThreads() throws InterruptedException {
151		final AtomicReferenceArray a = new AtomicReferenceArray(1);
152		a.set(0, one);
153	<	Thread t = new Thread(new Runnable() {
154	<	public void run() {
155	<	while(!a.compareAndSet(0, two, three)) Thread.yield();
156	<	}});
157	<	try {
158	<	t.start();
159	<	assertTrue(a.compareAndSet(0, one, two));
160	<	t.join(LONG_DELAY_MS);
161	<	assertFalse(t.isAlive());
162	<	assertEquals(a.get(0), three);
163	<	}
105	<	catch(Exception e) {
106	<	unexpectedException();
107	<	}
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
168	>	* to expected
169		*/
170	<	public void testWeakCompareAndSet(){
171	<	AtomicReferenceArray ai = new AtomicReferenceArray(SIZE);
172	<	for (int i = 0; i < SIZE; ++i) {
173	<	ai.set(i, one);
174	<	while(!ai.weakCompareAndSet(i, one,two));
175	<	while(!ai.weakCompareAndSet(i, two,m4));
176	<	assertEquals(m4,ai.get(i));
177	<	while(!ai.weakCompareAndSet(i, m4,seven));
178	<	assertEquals(seven,ai.get(i));
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 ai = new AtomicReferenceArray(SIZE);
187	<	for (int i = 0; i < SIZE; ++i) {
188	<	ai.set(i, one);
189	<	assertEquals(one,ai.getAndSet(i,zero));
190	<	assertEquals(0,ai.getAndSet(i,m10));
191	<	assertEquals(m10,ai.getAndSet(i,one));
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() {
199	<	AtomicReferenceArray l = new AtomicReferenceArray(SIZE);
200	<	for (int i = 0; i < SIZE; ++i) {
201	<	l.set(i, new Integer(-i));
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	<
204	<	try {
205	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
206	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
207	<	out.writeObject(l);
152	<	out.close();
153	<
154	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
155	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
156	<	AtomicReferenceArray r = (AtomicReferenceArray) in.readObject();
157	<	assertEquals(l.length(), r.length());
158	<	for (int i = 0; i < SIZE; ++i) {
159	<	assertEquals(r.get(i), l.get(i));
160	<	}
161	<	} catch(Exception e){
162	<	unexpectedException();
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	+	}
219		}

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