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

Comparing jsr166/src/test/tck/AtomicLongTest.java (file contents):
Revision 1.3 by dl, Sun Sep 14 20:42:40 2003 UTC vs.
Revision 1.34 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.*;
10	<	import java.util.concurrent.atomic.*;
11	<	import java.io.*;
9	>	import java.util.concurrent.atomic.AtomicLong;
10	>
11	>	import junit.framework.Test;
12	>	import junit.framework.TestSuite;
13
14		public class AtomicLongTest extends JSR166TestCase {
15	<	public static void main (String[] args) {
16	<	junit.textui.TestRunner.run (suite());
15	>	public static void main(String[] args) {
16	>	main(suite(), args);
17		}
18		public static Test suite() {
19		return new TestSuite(AtomicLongTest.class);
20		}
21
22	<	public void testConstructor(){
23	<	AtomicLong ai = new AtomicLong(1);
24	<	assertEquals(1,ai.get());
25	<	}
26	<
27	<	public void testConstructor2(){
22	>	final long[] VALUES = {
23	>	Long.MIN_VALUE,
24	>	Integer.MIN_VALUE, -1, 0, 1, 42, Integer.MAX_VALUE,
25	>	Long.MAX_VALUE,
26	>	};
27	>
28	>	/**
29	>	* constructor initializes to given value
30	>	*/
31	>	public void testConstructor() {
32	>	AtomicLong ai = new AtomicLong(1);
33	>	assertEquals(1, ai.get());
34	>	}
35	>
36	>	/**
37	>	* default constructed initializes to zero
38	>	*/
39	>	public void testConstructor2() {
40		AtomicLong ai = new AtomicLong();
41	<	assertEquals(0,ai.get());
28	<	}
29	<
30	<	public void testGetSet(){
31	<	AtomicLong ai = new AtomicLong(1);
32	<	assertEquals(1,ai.get());
33	<	ai.set(2);
34	<	assertEquals(2,ai.get());
35	<	ai.set(-3);
36	<	assertEquals(-3,ai.get());
37	<
38	<	}
39	<	public void testCompareAndSet(){
40	<	AtomicLong ai = new AtomicLong(1);
41	<	assertTrue(ai.compareAndSet(1,2));
42	<	assertTrue(ai.compareAndSet(2,-4));
43	<	assertEquals(-4,ai.get());
44	<	assertFalse(ai.compareAndSet(-5,7));
45	<	assertFalse((7 == ai.get()));
46	<	assertTrue(ai.compareAndSet(-4,7));
47	<	assertEquals(7,ai.get());
48	<	}
49	<
50	<	public void testWeakCompareAndSet(){
51	<	AtomicLong ai = new AtomicLong(1);
52	<	while(!ai.weakCompareAndSet(1,2));
53	<	while(!ai.weakCompareAndSet(2,-4));
54	<	assertEquals(-4,ai.get());
55	<	while(!ai.weakCompareAndSet(-4,7));
56	<	assertEquals(7,ai.get());
57	<	}
58	<
59	<	public void testGetAndSet(){
60	<	AtomicLong ai = new AtomicLong(1);
61	<	assertEquals(1,ai.getAndSet(0));
62	<	assertEquals(0,ai.getAndSet(-10));
63	<	assertEquals(-10,ai.getAndSet(1));
64	<	}
65	<
66	<	public void testGetAndAdd(){
67	<	AtomicLong ai = new AtomicLong(1);
68	<	assertEquals(1,ai.getAndAdd(2));
69	<	assertEquals(3,ai.get());
70	<	assertEquals(3,ai.getAndAdd(-4));
71	<	assertEquals(-1,ai.get());
41	>	assertEquals(0, ai.get());
42		}
43
44	<	public void testGetAndDecrement(){
45	<	AtomicLong ai = new AtomicLong(1);
46	<	assertEquals(1,ai.getAndDecrement());
47	<	assertEquals(0,ai.getAndDecrement());
48	<	assertEquals(-1,ai.getAndDecrement());
49	<	}
50	<
51	<	public void testGetAndIncrement(){
52	<	AtomicLong ai = new AtomicLong(1);
53	<	assertEquals(1,ai.getAndIncrement());
54	<	assertEquals(2,ai.get());
55	<	ai.set(-2);
56	<	assertEquals(-2,ai.getAndIncrement());
57	<	assertEquals(-1,ai.getAndIncrement());
58	<	assertEquals(0,ai.getAndIncrement());
59	<	assertEquals(1,ai.get());
44	>	/**
45	>	* get returns the last value set
46	>	*/
47	>	public void testGetSet() {
48	>	AtomicLong ai = new AtomicLong(1);
49	>	assertEquals(1, ai.get());
50	>	ai.set(2);
51	>	assertEquals(2, ai.get());
52	>	ai.set(-3);
53	>	assertEquals(-3, ai.get());
54	>	}
55	>
56	>	/**
57	>	* get returns the last value lazySet in same thread
58	>	*/
59	>	public void testGetLazySet() {
60	>	AtomicLong ai = new AtomicLong(1);
61	>	assertEquals(1, ai.get());
62	>	ai.lazySet(2);
63	>	assertEquals(2, ai.get());
64	>	ai.lazySet(-3);
65	>	assertEquals(-3, ai.get());
66	>	}
67	>
68	>	/**
69	>	* compareAndSet succeeds in changing value if equal to expected else fails
70	>	*/
71	>	public void testCompareAndSet() {
72	>	AtomicLong ai = new AtomicLong(1);
73	>	assertTrue(ai.compareAndSet(1, 2));
74	>	assertTrue(ai.compareAndSet(2, -4));
75	>	assertEquals(-4, ai.get());
76	>	assertFalse(ai.compareAndSet(-5, 7));
77	>	assertEquals(-4, ai.get());
78	>	assertTrue(ai.compareAndSet(-4, 7));
79	>	assertEquals(7, ai.get());
80	>	}
81	>
82	>	/**
83	>	* compareAndSet in one thread enables another waiting for value
84	>	* to succeed
85	>	*/
86	>	public void testCompareAndSetInMultipleThreads() throws Exception {
87	>	final AtomicLong ai = new AtomicLong(1);
88	>	Thread t = new Thread(new CheckedRunnable() {
89	>	public void realRun() {
90	>	while (!ai.compareAndSet(2, 3))
91	>	Thread.yield();
92	>	}});
93	>
94	>	t.start();
95	>	assertTrue(ai.compareAndSet(1, 2));
96	>	t.join(LONG_DELAY_MS);
97	>	assertFalse(t.isAlive());
98	>	assertEquals(3, ai.get());
99	>	}
100	>
101	>	/**
102	>	* repeated weakCompareAndSet succeeds in changing value when equal
103	>	* to expected
104	>	*/
105	>	@SuppressWarnings("deprecation")
106	>	public void testWeakCompareAndSet() {
107	>	AtomicLong ai = new AtomicLong(1);
108	>	do {} while (!ai.weakCompareAndSet(1, 2));
109	>	do {} while (!ai.weakCompareAndSet(2, -4));
110	>	assertEquals(-4, ai.get());
111	>	do {} while (!ai.weakCompareAndSet(-4, 7));
112	>	assertEquals(7, ai.get());
113	>	}
114	>
115	>	/**
116	>	* getAndSet returns previous value and sets to given value
117	>	*/
118	>	public void testGetAndSet() {
119	>	AtomicLong ai = new AtomicLong(1);
120	>	assertEquals(1, ai.getAndSet(0));
121	>	assertEquals(0, ai.getAndSet(-10));
122	>	assertEquals(-10, ai.getAndSet(1));
123	>	}
124	>
125	>	/**
126	>	* getAndAdd returns previous value and adds given value
127	>	*/
128	>	public void testGetAndAdd() {
129	>	AtomicLong ai = new AtomicLong(1);
130	>	assertEquals(1, ai.getAndAdd(2));
131	>	assertEquals(3, ai.get());
132	>	assertEquals(3, ai.getAndAdd(-4));
133	>	assertEquals(-1, ai.get());
134	>	}
135	>
136	>	/**
137	>	* getAndDecrement returns previous value and decrements
138	>	*/
139	>	public void testGetAndDecrement() {
140	>	AtomicLong ai = new AtomicLong(1);
141	>	assertEquals(1, ai.getAndDecrement());
142	>	assertEquals(0, ai.getAndDecrement());
143	>	assertEquals(-1, ai.getAndDecrement());
144	>	}
145	>
146	>	/**
147	>	* getAndIncrement returns previous value and increments
148	>	*/
149	>	public void testGetAndIncrement() {
150	>	AtomicLong ai = new AtomicLong(1);
151	>	assertEquals(1, ai.getAndIncrement());
152	>	assertEquals(2, ai.get());
153	>	ai.set(-2);
154	>	assertEquals(-2, ai.getAndIncrement());
155	>	assertEquals(-1, ai.getAndIncrement());
156	>	assertEquals(0, ai.getAndIncrement());
157	>	assertEquals(1, ai.get());
158	>	}
159	>
160	>	/**
161	>	* addAndGet adds given value to current, and returns current value
162	>	*/
163	>	public void testAddAndGet() {
164	>	AtomicLong ai = new AtomicLong(1);
165	>	assertEquals(3, ai.addAndGet(2));
166	>	assertEquals(3, ai.get());
167	>	assertEquals(-1, ai.addAndGet(-4));
168	>	assertEquals(-1, ai.get());
169	>	}
170	>
171	>	/**
172	>	* decrementAndGet decrements and returns current value
173	>	*/
174	>	public void testDecrementAndGet() {
175	>	AtomicLong ai = new AtomicLong(1);
176	>	assertEquals(0, ai.decrementAndGet());
177	>	assertEquals(-1, ai.decrementAndGet());
178	>	assertEquals(-2, ai.decrementAndGet());
179	>	assertEquals(-2, ai.get());
180	>	}
181	>
182	>	/**
183	>	* incrementAndGet increments and returns current value
184	>	*/
185	>	public void testIncrementAndGet() {
186	>	AtomicLong ai = new AtomicLong(1);
187	>	assertEquals(2, ai.incrementAndGet());
188	>	assertEquals(2, ai.get());
189	>	ai.set(-2);
190	>	assertEquals(-1, ai.incrementAndGet());
191	>	assertEquals(0, ai.incrementAndGet());
192	>	assertEquals(1, ai.incrementAndGet());
193	>	assertEquals(1, ai.get());
194	>	}
195	>
196	>	/**
197	>	* a deserialized/reserialized atomic holds same value
198	>	*/
199	>	public void testSerialization() throws Exception {
200	>	AtomicLong x = new AtomicLong();
201	>	AtomicLong y = serialClone(x);
202	>	assertNotSame(x, y);
203	>	x.set(-22);
204	>	AtomicLong z = serialClone(x);
205	>	assertNotSame(y, z);
206	>	assertEquals(-22, x.get());
207	>	assertEquals(0, y.get());
208	>	assertEquals(-22, z.get());
209	>	}
210	>
211	>	/**
212	>	* toString returns current value.
213	>	*/
214	>	public void testToString() {
215	>	AtomicLong ai = new AtomicLong();
216	>	assertEquals("0", ai.toString());
217	>	for (long x : VALUES) {
218	>	ai.set(x);
219	>	assertEquals(Long.toString(x), ai.toString());
220	>	}
221		}
222
223	<	public void testAddAndGet(){
224	<	AtomicLong ai = new AtomicLong(1);
225	<	assertEquals(3,ai.addAndGet(2));
226	<	assertEquals(3,ai.get());
227	<	assertEquals(-1,ai.addAndGet(-4));
228	<	assertEquals(-1,ai.get());
223	>	/**
224	>	* intValue returns current value.
225	>	*/
226	>	public void testIntValue() {
227	>	AtomicLong ai = new AtomicLong();
228	>	assertEquals(0, ai.intValue());
229	>	for (long x : VALUES) {
230	>	ai.set(x);
231	>	assertEquals((int)x, ai.intValue());
232	>	}
233		}
234
235	<	public void testDecrementAndGet(){
236	<	AtomicLong ai = new AtomicLong(1);
237	<	assertEquals(0,ai.decrementAndGet());
238	<	assertEquals(-1,ai.decrementAndGet());
239	<	assertEquals(-2,ai.decrementAndGet());
240	<	assertEquals(-2,ai.get());
235	>	/**
236	>	* longValue returns current value.
237	>	*/
238	>	public void testLongValue() {
239	>	AtomicLong ai = new AtomicLong();
240	>	assertEquals(0L, ai.longValue());
241	>	for (long x : VALUES) {
242	>	ai.set(x);
243	>	assertEquals(x, ai.longValue());
244	>	}
245		}
246
247	<	public void testIncrementAndGet(){
248	<	AtomicLong ai = new AtomicLong(1);
249	<	assertEquals(2,ai.incrementAndGet());
250	<	assertEquals(2,ai.get());
251	<	ai.set(-2);
252	<	assertEquals(-1,ai.incrementAndGet());
253	<	assertEquals(0,ai.incrementAndGet());
254	<	assertEquals(1,ai.incrementAndGet());
255	<	assertEquals(1,ai.get());
247	>	/**
248	>	* floatValue returns current value.
249	>	*/
250	>	public void testFloatValue() {
251	>	AtomicLong ai = new AtomicLong();
252	>	assertEquals(0.0f, ai.floatValue());
253	>	for (long x : VALUES) {
254	>	ai.set(x);
255	>	assertEquals((float)x, ai.floatValue());
256	>	}
257		}
258
259	<	public void testSerialization() {
260	<	AtomicLong l = new AtomicLong();
261	<
262	<	try {
263	<	l.set(-22);
264	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
265	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
266	<	out.writeObject(l);
267	<	out.close();
128	<
129	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
130	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
131	<	AtomicLong r = (AtomicLong) in.readObject();
132	<	assertEquals(l.get(), r.get());
133	<	} catch(Exception e){
134	<	e.printStackTrace();
135	<	fail("unexpected exception");
259	>	/**
260	>	* doubleValue returns current value.
261	>	*/
262	>	public void testDoubleValue() {
263	>	AtomicLong ai = new AtomicLong();
264	>	assertEquals(0.0d, ai.doubleValue());
265	>	for (long x : VALUES) {
266	>	ai.set(x);
267	>	assertEquals((double)x, ai.doubleValue());
268		}
269		}
270

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