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

Comparing jsr166/src/test/tck/AtomicReferenceArrayTest.java (file contents):
Revision 1.1 by dl, Sun Aug 31 19:24:53 2003 UTC vs.
Revision 1.28 by jsr166, Thu May 30 03:28:55 2013 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.util.Arrays;
11	>	import java.util.concurrent.atomic.AtomicReferenceArray;
12
13	<	public class AtomicReferenceArrayTest extends TestCase
14	<	{
15	<	static final int N = 10;
14	<
15	<	static final Integer zero = new Integer(0);
16	<	static final Integer one = new Integer(1);
17	<	static final Integer two = new Integer(2);
18	<	static final Integer m3  = new Integer(-3);
19	<	static final Integer m4 = new Integer(-4);
20	<	static final Integer m5 = new Integer(-5);
21	<	static final Integer seven = new Integer(7);
22	<	static final Integer m10 = new Integer(-10);
23	<
24	<	public static void main (String[] args) {
25	<	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) {
24	<	assertNull(ai.get(i));
21	>	/**
22	>	* constructor creates array of given size with all elements null
23	>	*/
24	>	public void testConstructor() {
25	>	AtomicReferenceArray<Integer> aa = new AtomicReferenceArray<Integer>(SIZE);
26	>	for (int i = 0; i < SIZE; i++) {
27	>	assertNull(aa.get(i));
28	>	}
29	>	}
30	>
31	>	/**
32	>	* constructor with null array throws NPE
33	>	*/
34	>	public void testConstructor2NPE() {
35	>	try {
36	>	Integer[] a = null;
37	>	AtomicReferenceArray<Integer> aa = 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> aa = new AtomicReferenceArray<Integer>(a);
48	>	assertEquals(a.length, aa.length());
49	>	for (int i = 0; i < a.length; i++)
50	>	assertEquals(a[i], aa.get(i));
51	>	}
52	>
53	>	/**
54	>	* Initialize AtomicReferenceArray<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> aa = new AtomicReferenceArray<Integer>(SIZE);
73	>	for (int index : new int[] { -1, SIZE }) {
74	>	try {
75	>	aa.get(index);
76	>	shouldThrow();
77	>	} catch (IndexOutOfBoundsException success) {}
78	>	try {
79	>	aa.set(index, null);
80	>	shouldThrow();
81	>	} catch (IndexOutOfBoundsException success) {}
82	>	try {
83	>	aa.lazySet(index, null);
84	>	shouldThrow();
85	>	} catch (IndexOutOfBoundsException success) {}
86	>	try {
87	>	aa.compareAndSet(index, null, null);
88	>	shouldThrow();
89	>	} catch (IndexOutOfBoundsException success) {}
90	>	try {
91	>	aa.weakCompareAndSet(index, null, null);
92	>	shouldThrow();
93	>	} catch (IndexOutOfBoundsException success) {}
94		}
95		}
96
97	<	public void testGetSet(){
98	<	AtomicReferenceArray ai = new AtomicReferenceArray(N);
99	<	for (int i = 0; i < N; ++i) {
100	<	ai.set(i, one);
101	<	assertEquals(one,ai.get(i));
102	<	ai.set(i, two);
103	<	assertEquals(two,ai.get(i));
104	<	ai.set(i, m3);
105	<	assertEquals(m3,ai.get(i));
97	>	/**
98	>	* get returns the last value set at index
99	>	*/
100	>	public void testGetSet() {
101	>	AtomicReferenceArray aa = new AtomicReferenceArray(SIZE);
102	>	for (int i = 0; i < SIZE; i++) {
103	>	aa.set(i, one);
104	>	assertSame(one, aa.get(i));
105	>	aa.set(i, two);
106	>	assertSame(two, aa.get(i));
107	>	aa.set(i, m3);
108	>	assertSame(m3, aa.get(i));
109		}
110		}
111
112	<	public void testCompareAndSet(){
113	<	AtomicReferenceArray ai = new AtomicReferenceArray(N);
114	<	for (int i = 0; i < N; ++i) {
115	<	ai.set(i, one);
116	<	assertTrue(ai.compareAndSet(i, one,two));
117	<	assertTrue(ai.compareAndSet(i, two,m4));
118	<	assertEquals(m4,ai.get(i));
119	<	assertFalse(ai.compareAndSet(i, m5,seven));
120	<	assertFalse((seven.equals(ai.get(i))));
121	<	assertTrue(ai.compareAndSet(i, m4,seven));
122	<	assertEquals(seven,ai.get(i));
112	>	/**
113	>	* get returns the last value lazySet at index by same thread
114	>	*/
115	>	public void testGetLazySet() {
116	>	AtomicReferenceArray aa = new AtomicReferenceArray(SIZE);
117	>	for (int i = 0; i < SIZE; i++) {
118	>	aa.lazySet(i, one);
119	>	assertSame(one, aa.get(i));
120	>	aa.lazySet(i, two);
121	>	assertSame(two, aa.get(i));
122	>	aa.lazySet(i, m3);
123	>	assertSame(m3, aa.get(i));
124		}
125		}
126
127	<	public void testWeakCompareAndSet(){
128	<	AtomicReferenceArray ai = new AtomicReferenceArray(N);
129	<	for (int i = 0; i < N; ++i) {
130	<	ai.set(i, one);
131	<	while(!ai.weakCompareAndSet(i, one,two));
132	<	while(!ai.weakCompareAndSet(i, two,m4));
133	<	assertEquals(m4,ai.get(i));
134	<	while(!ai.weakCompareAndSet(i, m4,seven));
135	<	assertEquals(seven,ai.get(i));
127	>	/**
128	>	* compareAndSet succeeds in changing value if equal to expected else fails
129	>	*/
130	>	public void testCompareAndSet() {
131	>	AtomicReferenceArray aa = new AtomicReferenceArray(SIZE);
132	>	for (int i = 0; i < SIZE; i++) {
133	>	aa.set(i, one);
134	>	assertTrue(aa.compareAndSet(i, one, two));
135	>	assertTrue(aa.compareAndSet(i, two, m4));
136	>	assertSame(m4, aa.get(i));
137	>	assertFalse(aa.compareAndSet(i, m5, seven));
138	>	assertSame(m4, aa.get(i));
139	>	assertTrue(aa.compareAndSet(i, m4, seven));
140	>	assertSame(seven, aa.get(i));
141		}
142		}
143
144	<	public void testGetAndSet(){
145	<	AtomicReferenceArray ai = new AtomicReferenceArray(N);
146	<	for (int i = 0; i < N; ++i) {
147	<	ai.set(i, one);
148	<	assertEquals(one,ai.getAndSet(i,zero));
149	<	assertEquals(0,ai.getAndSet(i,m10));
150	<	assertEquals(m10,ai.getAndSet(i,one));
144	>	/**
145	>	* compareAndSet in one thread enables another waiting for value
146	>	* to succeed
147	>	*/
148	>	public void testCompareAndSetInMultipleThreads() throws InterruptedException {
149	>	final AtomicReferenceArray a = new AtomicReferenceArray(1);
150	>	a.set(0, one);
151	>	Thread t = new Thread(new CheckedRunnable() {
152	>	public void realRun() {
153	>	while (!a.compareAndSet(0, two, three))
154	>	Thread.yield();
155	>	}});
156	>
157	>	t.start();
158	>	assertTrue(a.compareAndSet(0, one, two));
159	>	t.join(LONG_DELAY_MS);
160	>	assertFalse(t.isAlive());
161	>	assertSame(three, a.get(0));
162	>	}
163	>
164	>	/**
165	>	* repeated weakCompareAndSet succeeds in changing value when equal
166	>	* to expected
167	>	*/
168	>	public void testWeakCompareAndSet() {
169	>	AtomicReferenceArray aa = new AtomicReferenceArray(SIZE);
170	>	for (int i = 0; i < SIZE; i++) {
171	>	aa.set(i, one);
172	>	while (!aa.weakCompareAndSet(i, one, two));
173	>	while (!aa.weakCompareAndSet(i, two, m4));
174	>	assertSame(m4, aa.get(i));
175	>	while (!aa.weakCompareAndSet(i, m4, seven));
176	>	assertSame(seven, aa.get(i));
177		}
178		}
179
180	+	/**
181	+	* getAndSet returns previous value and sets to given value at given index
182	+	*/
183	+	public void testGetAndSet() {
184	+	AtomicReferenceArray aa = new AtomicReferenceArray(SIZE);
185	+	for (int i = 0; i < SIZE; i++) {
186	+	aa.set(i, one);
187	+	assertSame(one, aa.getAndSet(i, zero));
188	+	assertSame(zero, aa.getAndSet(i, m10));
189	+	assertSame(m10, aa.getAndSet(i, one));
190	+	}
191	+	}
192
193	+	/**
194	+	* a deserialized serialized array holds same values
195	+	*/
196	+	public void testSerialization() throws Exception {
197	+	AtomicReferenceArray x = new AtomicReferenceArray(SIZE);
198	+	for (int i = 0; i < SIZE; i++) {
199	+	x.set(i, new Integer(-i));
200	+	}
201	+	AtomicReferenceArray y = serialClone(x);
202	+	assertNotSame(x, y);
203	+	assertEquals(x.length(), y.length());
204	+	for (int i = 0; i < SIZE; i++) {
205	+	assertEquals(x.get(i), y.get(i));
206	+	}
207	+	}
208	+
209	+	/**
210	+	* toString returns current value.
211	+	*/
212	+	public void testToString() {
213	+	Integer[] a = { two, one, three, four, seven };
214	+	AtomicReferenceArray<Integer> aa = new AtomicReferenceArray<Integer>(a);
215	+	assertEquals(Arrays.toString(a), aa.toString());
216	+	}
217		}

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