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

Comparing jsr166/src/test/tck/AtomicLongTest.java (file contents):
Revision 1.8 by dl, Fri Jan 9 20:07:36 2004 UTC vs.
Revision 1.33 by jsr166, Fri Aug 4 03:30:21 2017 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.*;
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	+	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(){
31	>	public void testConstructor() {
32		AtomicLong ai = new AtomicLong(1);
33	<	assertEquals(1,ai.get());
33	>	assertEquals(1, ai.get());
34		}
35
36		/**
37		* default constructed initializes to zero
38		*/
39	<	public void testConstructor2(){
39	>	public void testConstructor2() {
40		AtomicLong ai = new AtomicLong();
41	<	assertEquals(0,ai.get());
41	>	assertEquals(0, ai.get());
42		}
43
44		/**
45		* get returns the last value set
46		*/
47	<	public void testGetSet(){
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.set(2);
63	<	assertEquals(2,ai.get());
64	<	ai.set(-3);
65	<	assertEquals(-3,ai.get());
47	<
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(){
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	<	assertFalse((7 == ai.get()));
78	<	assertTrue(ai.compareAndSet(-4,7));
79	<	assertEquals(7,ai.get());
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() {
86	>	public void testCompareAndSetInMultipleThreads() throws Exception {
87		final AtomicLong ai = new AtomicLong(1);
88	<	Thread t = new Thread(new Runnable() {
89	<	public void run() {
90	<	while(!ai.compareAndSet(2, 3)) Thread.yield();
91	<	}});
92	<	try {
93	<	t.start();
94	<	assertTrue(ai.compareAndSet(1, 2));
95	<	t.join(LONG_DELAY_MS);
96	<	assertFalse(t.isAlive());
97	<	assertEquals(ai.get(), 3);
98	<	}
80	<	catch(Exception e) {
81	<	unexpectedException();
82	<	}
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
103	>	* to expected
104		*/
105	<	public void testWeakCompareAndSet(){
105	>	public void testWeakCompareAndSet() {
106		AtomicLong ai = new AtomicLong(1);
107	<	while(!ai.weakCompareAndSet(1,2));
108	<	while(!ai.weakCompareAndSet(2,-4));
109	<	assertEquals(-4,ai.get());
110	<	while(!ai.weakCompareAndSet(-4,7));
111	<	assertEquals(7,ai.get());
107	>	do {} while (!ai.weakCompareAndSet(1, 2));
108	>	do {} while (!ai.weakCompareAndSet(2, -4));
109	>	assertEquals(-4, ai.get());
110	>	do {} while (!ai.weakCompareAndSet(-4, 7));
111	>	assertEquals(7, ai.get());
112		}
113
114		/**
115		* getAndSet returns previous value and sets to given value
116		*/
117	<	public void testGetAndSet(){
117	>	public void testGetAndSet() {
118		AtomicLong ai = new AtomicLong(1);
119	<	assertEquals(1,ai.getAndSet(0));
120	<	assertEquals(0,ai.getAndSet(-10));
121	<	assertEquals(-10,ai.getAndSet(1));
119	>	assertEquals(1, ai.getAndSet(0));
120	>	assertEquals(0, ai.getAndSet(-10));
121	>	assertEquals(-10, ai.getAndSet(1));
122		}
123
124		/**
125		* getAndAdd returns previous value and adds given value
126		*/
127	<	public void testGetAndAdd(){
127	>	public void testGetAndAdd() {
128		AtomicLong ai = new AtomicLong(1);
129	<	assertEquals(1,ai.getAndAdd(2));
130	<	assertEquals(3,ai.get());
131	<	assertEquals(3,ai.getAndAdd(-4));
132	<	assertEquals(-1,ai.get());
129	>	assertEquals(1, ai.getAndAdd(2));
130	>	assertEquals(3, ai.get());
131	>	assertEquals(3, ai.getAndAdd(-4));
132	>	assertEquals(-1, ai.get());
133		}
134
135		/**
136		* getAndDecrement returns previous value and decrements
137		*/
138	<	public void testGetAndDecrement(){
138	>	public void testGetAndDecrement() {
139		AtomicLong ai = new AtomicLong(1);
140	<	assertEquals(1,ai.getAndDecrement());
141	<	assertEquals(0,ai.getAndDecrement());
142	<	assertEquals(-1,ai.getAndDecrement());
140	>	assertEquals(1, ai.getAndDecrement());
141	>	assertEquals(0, ai.getAndDecrement());
142	>	assertEquals(-1, ai.getAndDecrement());
143		}
144
145		/**
146		* getAndIncrement returns previous value and increments
147		*/
148	<	public void testGetAndIncrement(){
148	>	public void testGetAndIncrement() {
149		AtomicLong ai = new AtomicLong(1);
150	<	assertEquals(1,ai.getAndIncrement());
151	<	assertEquals(2,ai.get());
152	<	ai.set(-2);
153	<	assertEquals(-2,ai.getAndIncrement());
154	<	assertEquals(-1,ai.getAndIncrement());
155	<	assertEquals(0,ai.getAndIncrement());
156	<	assertEquals(1,ai.get());
150	>	assertEquals(1, ai.getAndIncrement());
151	>	assertEquals(2, ai.get());
152	>	ai.set(-2);
153	>	assertEquals(-2, ai.getAndIncrement());
154	>	assertEquals(-1, ai.getAndIncrement());
155	>	assertEquals(0, ai.getAndIncrement());
156	>	assertEquals(1, ai.get());
157		}
158
159		/**
160		* addAndGet adds given value to current, and returns current value
161		*/
162	<	public void testAddAndGet(){
162	>	public void testAddAndGet() {
163		AtomicLong ai = new AtomicLong(1);
164	<	assertEquals(3,ai.addAndGet(2));
165	<	assertEquals(3,ai.get());
166	<	assertEquals(-1,ai.addAndGet(-4));
167	<	assertEquals(-1,ai.get());
164	>	assertEquals(3, ai.addAndGet(2));
165	>	assertEquals(3, ai.get());
166	>	assertEquals(-1, ai.addAndGet(-4));
167	>	assertEquals(-1, ai.get());
168		}
169
170		/**
171		* decrementAndGet decrements and returns current value
172		*/
173	<	public void testDecrementAndGet(){
173	>	public void testDecrementAndGet() {
174		AtomicLong ai = new AtomicLong(1);
175	<	assertEquals(0,ai.decrementAndGet());
176	<	assertEquals(-1,ai.decrementAndGet());
177	<	assertEquals(-2,ai.decrementAndGet());
178	<	assertEquals(-2,ai.get());
175	>	assertEquals(0, ai.decrementAndGet());
176	>	assertEquals(-1, ai.decrementAndGet());
177	>	assertEquals(-2, ai.decrementAndGet());
178	>	assertEquals(-2, ai.get());
179		}
180
181		/**
182		* incrementAndGet increments and returns current value
183		*/
184	<	public void testIncrementAndGet(){
184	>	public void testIncrementAndGet() {
185		AtomicLong ai = new AtomicLong(1);
186	<	assertEquals(2,ai.incrementAndGet());
187	<	assertEquals(2,ai.get());
188	<	ai.set(-2);
189	<	assertEquals(-1,ai.incrementAndGet());
190	<	assertEquals(0,ai.incrementAndGet());
191	<	assertEquals(1,ai.incrementAndGet());
192	<	assertEquals(1,ai.get());
186	>	assertEquals(2, ai.incrementAndGet());
187	>	assertEquals(2, ai.get());
188	>	ai.set(-2);
189	>	assertEquals(-1, ai.incrementAndGet());
190	>	assertEquals(0, ai.incrementAndGet());
191	>	assertEquals(1, ai.incrementAndGet());
192	>	assertEquals(1, ai.get());
193		}
194
195		/**
196	<	* a deserialized serialized atomic holds same value
197	<	*/
198	<	public void testSerialization() {
199	<	AtomicLong l = new AtomicLong();
200	<
201	<	try {
202	<	l.set(-22);
203	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
204	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
205	<	out.writeObject(l);
206	<	out.close();
207	<
192	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
193	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
194	<	AtomicLong r = (AtomicLong) in.readObject();
195	<	assertEquals(l.get(), r.get());
196	<	} catch(Exception e){
197	<	unexpectedException();
198	<	}
196	>	* a deserialized/reserialized atomic holds same value
197	>	*/
198	>	public void testSerialization() throws Exception {
199	>	AtomicLong x = new AtomicLong();
200	>	AtomicLong y = serialClone(x);
201	>	assertNotSame(x, y);
202	>	x.set(-22);
203	>	AtomicLong z = serialClone(x);
204	>	assertNotSame(y, z);
205	>	assertEquals(-22, x.get());
206	>	assertEquals(0, y.get());
207	>	assertEquals(-22, z.get());
208		}
209
210		/**
211		* toString returns current value.
212	<	*/
212	>	*/
213		public void testToString() {
214		AtomicLong ai = new AtomicLong();
215	<	for (long i = -12; i < 6; ++i) {
216	<	ai.set(i);
217	<	assertEquals(ai.toString(), Long.toString(i));
215	>	assertEquals("0", ai.toString());
216	>	for (long x : VALUES) {
217	>	ai.set(x);
218	>	assertEquals(Long.toString(x), ai.toString());
219		}
220		}
221	+
222	+	/**
223	+	* intValue returns current value.
224	+	*/
225	+	public void testIntValue() {
226	+	AtomicLong ai = new AtomicLong();
227	+	assertEquals(0, ai.intValue());
228	+	for (long x : VALUES) {
229	+	ai.set(x);
230	+	assertEquals((int)x, ai.intValue());
231	+	}
232	+	}
233	+
234	+	/**
235	+	* longValue returns current value.
236	+	*/
237	+	public void testLongValue() {
238	+	AtomicLong ai = new AtomicLong();
239	+	assertEquals(0L, ai.longValue());
240	+	for (long x : VALUES) {
241	+	ai.set(x);
242	+	assertEquals(x, ai.longValue());
243	+	}
244	+	}
245	+
246	+	/**
247	+	* floatValue returns current value.
248	+	*/
249	+	public void testFloatValue() {
250	+	AtomicLong ai = new AtomicLong();
251	+	assertEquals(0.0f, ai.floatValue());
252	+	for (long x : VALUES) {
253	+	ai.set(x);
254	+	assertEquals((float)x, ai.floatValue());
255	+	}
256	+	}
257	+
258	+	/**
259	+	* doubleValue returns current value.
260	+	*/
261	+	public void testDoubleValue() {
262	+	AtomicLong ai = new AtomicLong();
263	+	assertEquals(0.0d, ai.doubleValue());
264	+	for (long x : VALUES) {
265	+	ai.set(x);
266	+	assertEquals((double)x, ai.doubleValue());
267	+	}
268	+	}
269	+
270		}

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