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

Comparing jsr166/src/test/tck/AtomicIntegerTest.java (file contents):
Revision 1.1 by dl, Sun Aug 31 19:24:53 2003 UTC vs.
Revision 1.33 by dl, Tue Jan 26 13:33:05 2021 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.*;
9	<	import java.util.concurrent.atomic.*;
9	>	import java.util.concurrent.atomic.AtomicInteger;
10
11	<	public class AtomicIntegerTest extends TestCase {
12	<	public static void main (String[] args) {
13	<	junit.textui.TestRunner.run (suite());
11	>	import junit.framework.Test;
12	>	import junit.framework.TestSuite;
13	>
14	>	public class AtomicIntegerTest extends JSR166TestCase {
15	>	public static void main(String[] args) {
16	>	main(suite(), args);
17		}
18		public static Test suite() {
19		return new TestSuite(AtomicIntegerTest.class);
20		}
21
22	<	public void testConstructor(){
23	<	AtomicInteger ai = new AtomicInteger(1);
24	<	assertEquals(1,ai.get());
25	<	}
26	<
27	<	public void testConstructor2(){
22	>	final int[] VALUES = {
23	>	Integer.MIN_VALUE, -1, 0, 1, 42, Integer.MAX_VALUE,
24	>	};
25	>
26	>	/**
27	>	* constructor initializes to given value
28	>	*/
29	>	public void testConstructor() {
30	>	AtomicInteger ai = new AtomicInteger(1);
31	>	assertEquals(1, ai.get());
32	>	}
33	>
34	>	/**
35	>	* default constructed initializes to zero
36	>	*/
37	>	public void testConstructor2() {
38		AtomicInteger ai = new AtomicInteger();
39	<	assertEquals(0,ai.get());
27	<	}
28	<
29	<	public void testGetSet(){
30	<	AtomicInteger ai = new AtomicInteger(1);
31	<	assertEquals(1,ai.get());
32	<	ai.set(2);
33	<	assertEquals(2,ai.get());
34	<	ai.set(-3);
35	<	assertEquals(-3,ai.get());
36	<
37	<	}
38	<	public void testCompareAndSet(){
39	<	AtomicInteger ai = new AtomicInteger(1);
40	<	assertTrue(ai.compareAndSet(1,2));
41	<	assertTrue(ai.compareAndSet(2,-4));
42	<	assertEquals(-4,ai.get());
43	<	assertFalse(ai.compareAndSet(-5,7));
44	<	assertFalse((7 == ai.get()));
45	<	assertTrue(ai.compareAndSet(-4,7));
46	<	assertEquals(7,ai.get());
47	<	}
48	<
49	<	public void testWeakCompareAndSet(){
50	<	AtomicInteger ai = new AtomicInteger(1);
51	<	while(!ai.weakCompareAndSet(1,2));
52	<	while(!ai.weakCompareAndSet(2,-4));
53	<	assertEquals(-4,ai.get());
54	<	while(!ai.weakCompareAndSet(-4,7));
55	<	assertEquals(7,ai.get());
56	<	}
57	<
58	<	public void testGetAndSet(){
59	<	AtomicInteger ai = new AtomicInteger(1);
60	<	assertEquals(1,ai.getAndSet(0));
61	<	assertEquals(0,ai.getAndSet(-10));
62	<	assertEquals(-10,ai.getAndSet(1));
39	>	assertEquals(0, ai.get());
40		}
41
42	<	public void testGetAndAdd(){
43	<	AtomicInteger ai = new AtomicInteger(1);
44	<	assertEquals(1,ai.getAndAdd(2));
45	<	assertEquals(3,ai.get());
46	<	assertEquals(3,ai.getAndAdd(-4));
47	<	assertEquals(-1,ai.get());
48	<	}
49	<
50	<	public void testGetAndDecrement(){
51	<	AtomicInteger ai = new AtomicInteger(1);
52	<	assertEquals(1,ai.getAndDecrement());
53	<	assertEquals(0,ai.getAndDecrement());
54	<	assertEquals(-1,ai.getAndDecrement());
42	>	/**
43	>	* get returns the last value set
44	>	*/
45	>	public void testGetSet() {
46	>	AtomicInteger ai = new AtomicInteger(1);
47	>	assertEquals(1, ai.get());
48	>	ai.set(2);
49	>	assertEquals(2, ai.get());
50	>	ai.set(-3);
51	>	assertEquals(-3, ai.get());
52	>	}
53	>
54	>	/**
55	>	* get returns the last value lazySet in same thread
56	>	*/
57	>	public void testGetLazySet() {
58	>	AtomicInteger ai = new AtomicInteger(1);
59	>	assertEquals(1, ai.get());
60	>	ai.lazySet(2);
61	>	assertEquals(2, ai.get());
62	>	ai.lazySet(-3);
63	>	assertEquals(-3, ai.get());
64	>	}
65	>
66	>	/**
67	>	* compareAndSet succeeds in changing value if equal to expected else fails
68	>	*/
69	>	public void testCompareAndSet() {
70	>	AtomicInteger ai = new AtomicInteger(1);
71	>	assertTrue(ai.compareAndSet(1, 2));
72	>	assertTrue(ai.compareAndSet(2, -4));
73	>	assertEquals(-4, ai.get());
74	>	assertFalse(ai.compareAndSet(-5, 7));
75	>	assertEquals(-4, ai.get());
76	>	assertTrue(ai.compareAndSet(-4, 7));
77	>	assertEquals(7, ai.get());
78	>	}
79	>
80	>	/**
81	>	* compareAndSet in one thread enables another waiting for value
82	>	* to succeed
83	>	*/
84	>	public void testCompareAndSetInMultipleThreads() throws Exception {
85	>	final AtomicInteger ai = new AtomicInteger(1);
86	>	Thread t = new Thread(new CheckedRunnable() {
87	>	public void realRun() {
88	>	while (!ai.compareAndSet(2, 3))
89	>	Thread.yield();
90	>	}});
91	>
92	>	t.start();
93	>	assertTrue(ai.compareAndSet(1, 2));
94	>	t.join(LONG_DELAY_MS);
95	>	assertFalse(t.isAlive());
96	>	assertEquals(3, ai.get());
97	>	}
98	>
99	>	/**
100	>	* repeated weakCompareAndSet succeeds in changing value when equal
101	>	* to expected
102	>	*/
103	>	@SuppressWarnings("deprecation")
104	>	public void testWeakCompareAndSet() {
105	>	AtomicInteger ai = new AtomicInteger(1);
106	>	do {} while (!ai.weakCompareAndSet(1, 2));
107	>	do {} while (!ai.weakCompareAndSet(2, -4));
108	>	assertEquals(-4, ai.get());
109	>	do {} while (!ai.weakCompareAndSet(-4, 7));
110	>	assertEquals(7, ai.get());
111	>	}
112	>
113	>	/**
114	>	* getAndSet returns previous value and sets to given value
115	>	*/
116	>	public void testGetAndSet() {
117	>	AtomicInteger ai = new AtomicInteger(1);
118	>	assertEquals(1, ai.getAndSet(0));
119	>	assertEquals(0, ai.getAndSet(-10));
120	>	assertEquals(-10, ai.getAndSet(1));
121	>	}
122	>
123	>	/**
124	>	* getAndAdd returns previous value and adds given value
125	>	*/
126	>	public void testGetAndAdd() {
127	>	AtomicInteger ai = new AtomicInteger(1);
128	>	assertEquals(1, ai.getAndAdd(2));
129	>	assertEquals(3, ai.get());
130	>	assertEquals(3, ai.getAndAdd(-4));
131	>	assertEquals(-1, ai.get());
132	>	}
133	>
134	>	/**
135	>	* getAndDecrement returns previous value and decrements
136	>	*/
137	>	public void testGetAndDecrement() {
138	>	AtomicInteger ai = new AtomicInteger(1);
139	>	assertEquals(1, ai.getAndDecrement());
140	>	assertEquals(0, ai.getAndDecrement());
141	>	assertEquals(-1, ai.getAndDecrement());
142	>	}
143	>
144	>	/**
145	>	* getAndIncrement returns previous value and increments
146	>	*/
147	>	public void testGetAndIncrement() {
148	>	AtomicInteger ai = new AtomicInteger(1);
149	>	assertEquals(1, ai.getAndIncrement());
150	>	assertEquals(2, ai.get());
151	>	ai.set(-2);
152	>	assertEquals(-2, ai.getAndIncrement());
153	>	assertEquals(-1, ai.getAndIncrement());
154	>	assertEquals(0, ai.getAndIncrement());
155	>	assertEquals(1, ai.get());
156	>	}
157	>
158	>	/**
159	>	* addAndGet adds given value to current, and returns current value
160	>	*/
161	>	public void testAddAndGet() {
162	>	AtomicInteger ai = new AtomicInteger(1);
163	>	assertEquals(3, ai.addAndGet(2));
164	>	assertEquals(3, ai.get());
165	>	assertEquals(-1, ai.addAndGet(-4));
166	>	assertEquals(-1, ai.get());
167	>	}
168	>
169	>	/**
170	>	* decrementAndGet decrements and returns current value
171	>	*/
172	>	public void testDecrementAndGet() {
173	>	AtomicInteger ai = new AtomicInteger(1);
174	>	assertEquals(0, ai.decrementAndGet());
175	>	assertEquals(-1, ai.decrementAndGet());
176	>	assertEquals(-2, ai.decrementAndGet());
177	>	assertEquals(-2, ai.get());
178	>	}
179	>
180	>	/**
181	>	* incrementAndGet increments and returns current value
182	>	*/
183	>	public void testIncrementAndGet() {
184	>	AtomicInteger ai = new AtomicInteger(1);
185	>	assertEquals(2, ai.incrementAndGet());
186	>	assertEquals(2, ai.get());
187	>	ai.set(-2);
188	>	assertEquals(-1, ai.incrementAndGet());
189	>	assertEquals(0, ai.incrementAndGet());
190	>	assertEquals(1, ai.incrementAndGet());
191	>	assertEquals(1, ai.get());
192	>	}
193	>
194	>	/**
195	>	* a deserialized/reserialized atomic holds same value
196	>	*/
197	>	public void testSerialization() throws Exception {
198	>	AtomicInteger x = new AtomicInteger();
199	>	AtomicInteger y = serialClone(x);
200	>	assertNotSame(x, y);
201	>	x.set(22);
202	>	AtomicInteger z = serialClone(x);
203	>	assertEquals(22, x.get());
204	>	assertEquals(0, y.get());
205	>	assertEquals(22, z.get());
206	>	}
207	>
208	>	/**
209	>	* toString returns current value.
210	>	*/
211	>	public void testToString() {
212	>	AtomicInteger ai = new AtomicInteger();
213	>	assertEquals("0", ai.toString());
214	>	for (int x : VALUES) {
215	>	ai.set(x);
216	>	assertEquals(Integer.toString(x), ai.toString());
217	>	}
218		}
219
220	<	public void testGetAndIncrement(){
221	<	AtomicInteger ai = new AtomicInteger(1);
222	<	assertEquals(1,ai.getAndIncrement());
223	<	assertEquals(2,ai.get());
224	<	ai.set(-2);
225	<	assertEquals(-2,ai.getAndIncrement());
226	<	assertEquals(-1,ai.getAndIncrement());
227	<	assertEquals(0,ai.getAndIncrement());
228	<	assertEquals(1,ai.get());
220	>	/**
221	>	* intValue returns current value.
222	>	*/
223	>	public void testIntValue() {
224	>	AtomicInteger ai = new AtomicInteger();
225	>	assertEquals(0, ai.intValue());
226	>	for (int x : VALUES) {
227	>	ai.set(x);
228	>	assertEquals(x, ai.intValue());
229	>	}
230		}
231
232	<	public void testAddAndGet(){
233	<	AtomicInteger ai = new AtomicInteger(1);
234	<	assertEquals(3,ai.addAndGet(2));
235	<	assertEquals(3,ai.get());
236	<	assertEquals(-1,ai.addAndGet(-4));
237	<	assertEquals(-1,ai.get());
232	>	/**
233	>	* longValue returns current value.
234	>	*/
235	>	public void testLongValue() {
236	>	AtomicInteger ai = new AtomicInteger();
237	>	assertEquals(0L, ai.longValue());
238	>	for (int x : VALUES) {
239	>	ai.set(x);
240	>	assertEquals((long)x, ai.longValue());
241	>	}
242		}
243
244	<	public void testDecrementAndGet(){
245	<	AtomicInteger ai = new AtomicInteger(1);
246	<	assertEquals(0,ai.decrementAndGet());
247	<	assertEquals(-1,ai.decrementAndGet());
248	<	assertEquals(-2,ai.decrementAndGet());
249	<	assertEquals(-2,ai.get());
244	>	/**
245	>	* floatValue returns current value.
246	>	*/
247	>	public void testFloatValue() {
248	>	AtomicInteger ai = new AtomicInteger();
249	>	assertEquals(0.0f, ai.floatValue());
250	>	for (int x : VALUES) {
251	>	ai.set(x);
252	>	assertEquals((float)x, ai.floatValue());
253	>	}
254		}
255
256	<	public void testIncrementAndGet(){
257	<	AtomicInteger ai = new AtomicInteger(1);
258	<	assertEquals(2,ai.incrementAndGet());
259	<	assertEquals(2,ai.get());
260	<	ai.set(-2);
261	<	assertEquals(-1,ai.incrementAndGet());
262	<	assertEquals(0,ai.incrementAndGet());
263	<	assertEquals(1,ai.incrementAndGet());
264	<	assertEquals(1,ai.get());
256	>	/**
257	>	* doubleValue returns current value.
258	>	*/
259	>	public void testDoubleValue() {
260	>	AtomicInteger ai = new AtomicInteger();
261	>	assertEquals(0.0d, ai.doubleValue());
262	>	for (int x : VALUES) {
263	>	ai.set(x);
264	>	assertEquals((double)x, ai.doubleValue());
265	>	}
266		}
267
118	–
268		}

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