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Comparing jsr166/src/test/tck/AtomicIntegerFieldUpdaterTest.java (file contents):
Revision 1.3 by dl, Sat Sep 20 18:20:07 2003 UTC vs.
Revision 1.31 by jsr166, Mon Nov 9 18:42:41 2015 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 java.util.concurrent.atomic.*;
10	<	import junit.framework.*;
11	<	import java.util.*;
9	>	import java.util.concurrent.atomic.AtomicIntegerFieldUpdater;
10	>
11	>	import junit.framework.Test;
12	>	import junit.framework.TestSuite;
13
14		public class AtomicIntegerFieldUpdaterTest extends JSR166TestCase {
15		volatile int x = 0;
16	<	long z;
17	<
18	<	public static void main(String[] args){
19	<	junit.textui.TestRunner.run(suite());
16	>	protected volatile int protectedField;
17	>	private volatile int privateField;
18	>	int w;
19	>	float z;
20	>	public static void main(String[] args) {
21	>	main(suite(), args);
22		}
19	–
20	–
23		public static Test suite() {
24		return new TestSuite(AtomicIntegerFieldUpdaterTest.class);
25		}
26
27	+	// for testing subclass access
28	+	static class AtomicIntegerFieldUpdaterTestSubclass extends AtomicIntegerFieldUpdaterTest {
29	+	public void checkPrivateAccess() {
30	+	try {
31	+	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a =
32	+	AtomicIntegerFieldUpdater.newUpdater
33	+	(AtomicIntegerFieldUpdaterTest.class, "privateField");
34	+	shouldThrow();
35	+	} catch (RuntimeException success) {
36	+	assertNotNull(success.getCause());
37	+	}
38	+	}
39	+
40	+	public void checkCompareAndSetProtectedSub() {
41	+	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a =
42	+	AtomicIntegerFieldUpdater.newUpdater
43	+	(AtomicIntegerFieldUpdaterTest.class, "protectedField");
44	+	this.protectedField = 1;
45	+	assertTrue(a.compareAndSet(this, 1, 2));
46	+	assertTrue(a.compareAndSet(this, 2, -4));
47	+	assertEquals(-4, a.get(this));
48	+	assertFalse(a.compareAndSet(this, -5, 7));
49	+	assertEquals(-4, a.get(this));
50	+	assertTrue(a.compareAndSet(this, -4, 7));
51	+	assertEquals(7, a.get(this));
52	+	}
53	+	}
54	+
55	+	static class UnrelatedClass {
56	+	public void checkPackageAccess(AtomicIntegerFieldUpdaterTest obj) {
57	+	obj.x = 72;
58	+	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a =
59	+	AtomicIntegerFieldUpdater.newUpdater
60	+	(AtomicIntegerFieldUpdaterTest.class, "x");
61	+	assertEquals(72, a.get(obj));
62	+	assertTrue(a.compareAndSet(obj, 72, 73));
63	+	assertEquals(73, a.get(obj));
64	+	}
65	+
66	+	public void checkPrivateAccess(AtomicIntegerFieldUpdaterTest obj) {
67	+	try {
68	+	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a =
69	+	AtomicIntegerFieldUpdater.newUpdater
70	+	(AtomicIntegerFieldUpdaterTest.class, "privateField");
71	+	throw new AssertionError("should throw");
72	+	} catch (RuntimeException success) {
73	+	assertNotNull(success.getCause());
74	+	}
75	+	}
76	+	}
77	+
78	+	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> updaterFor(String fieldName) {
79	+	return AtomicIntegerFieldUpdater.newUpdater
80	+	(AtomicIntegerFieldUpdaterTest.class, fieldName);
81	+	}
82	+
83		/**
84	<	*
84	>	* Construction with non-existent field throws RuntimeException
85		*/
86		public void testConstructor() {
87	<	try{
88	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest>
31	<	a = AtomicIntegerFieldUpdater.newUpdater
32	<	(getClass(), "y");
87	>	try {
88	>	updaterFor("y");
89		shouldThrow();
90	+	} catch (RuntimeException success) {
91	+	assertNotNull(success.getCause());
92		}
35	–	catch (RuntimeException rt) {}
93		}
94
95		/**
96	<	*
96	>	* construction with field not of given type throws IllegalArgumentException
97		*/
98		public void testConstructor2() {
99	<	try{
100	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest>
44	<	a = AtomicIntegerFieldUpdater.newUpdater
45	<	(getClass(), "z");
99	>	try {
100	>	updaterFor("z");
101		shouldThrow();
102	<	}
103	<	catch (RuntimeException rt) {}
102	>	} catch (IllegalArgumentException success) {}
103	>	}
104	>
105	>	/**
106	>	* construction with non-volatile field throws IllegalArgumentException
107	>	*/
108	>	public void testConstructor3() {
109	>	try {
110	>	updaterFor("w");
111	>	shouldThrow();
112	>	} catch (IllegalArgumentException success) {}
113	>	}
114	>
115	>	/**
116	>	* construction using private field from subclass throws RuntimeException
117	>	*/
118	>	public void testPrivateFieldInSubclass() {
119	>	AtomicIntegerFieldUpdaterTestSubclass s =
120	>	new AtomicIntegerFieldUpdaterTestSubclass();
121	>	s.checkPrivateAccess();
122		}
123
124		/**
125	<	*
125	>	* construction from unrelated class; package access is allowed,
126	>	* private access is not
127	>	*/
128	>	public void testUnrelatedClassAccess() {
129	>	new UnrelatedClass().checkPackageAccess(this);
130	>	new UnrelatedClass().checkPrivateAccess(this);
131	>	}
132	>
133	>	/**
134	>	* get returns the last value set or assigned
135		*/
136		public void testGetSet() {
137	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
137	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
138	>	a = updaterFor("x");
139		x = 1;
140	<	assertEquals(1,a.get(this));
141	<	a.set(this,2);
142	<	assertEquals(2,a.get(this));
143	<	a.set(this,-3);
144	<	assertEquals(-3,a.get(this));
62	<
140	>	assertEquals(1, a.get(this));
141	>	a.set(this, 2);
142	>	assertEquals(2, a.get(this));
143	>	a.set(this, -3);
144	>	assertEquals(-3, a.get(this));
145		}
146	+
147		/**
148	<	*
148	>	* get returns the last value lazySet by same thread
149	>	*/
150	>	public void testGetLazySet() {
151	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
152	>	a = updaterFor("x");
153	>	x = 1;
154	>	assertEquals(1, a.get(this));
155	>	a.lazySet(this, 2);
156	>	assertEquals(2, a.get(this));
157	>	a.lazySet(this, -3);
158	>	assertEquals(-3, a.get(this));
159	>	}
160	>
161	>	/**
162	>	* compareAndSet succeeds in changing value if equal to expected else fails
163		*/
164		public void testCompareAndSet() {
165	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
165	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
166	>	a = updaterFor("x");
167		x = 1;
168	<	assertTrue(a.compareAndSet(this,1,2));
169	<	assertTrue(a.compareAndSet(this,2,-4));
170	<	assertEquals(-4,a.get(this));
171	<	assertFalse(a.compareAndSet(this,-5,7));
172	<	assertFalse((7 == a.get(this)));
173	<	assertTrue(a.compareAndSet(this,-4,7));
174	<	assertEquals(7,a.get(this));
168	>	assertTrue(a.compareAndSet(this, 1, 2));
169	>	assertTrue(a.compareAndSet(this, 2, -4));
170	>	assertEquals(-4, a.get(this));
171	>	assertFalse(a.compareAndSet(this, -5, 7));
172	>	assertEquals(-4, a.get(this));
173	>	assertTrue(a.compareAndSet(this, -4, 7));
174	>	assertEquals(7, a.get(this));
175	>	}
176	>
177	>	/**
178	>	* compareAndSet succeeds in changing protected field value if
179	>	* equal to expected else fails
180	>	*/
181	>	public void testCompareAndSetProtected() {
182	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
183	>	a = updaterFor("protectedField");
184	>	protectedField = 1;
185	>	assertTrue(a.compareAndSet(this, 1, 2));
186	>	assertTrue(a.compareAndSet(this, 2, -4));
187	>	assertEquals(-4, a.get(this));
188	>	assertFalse(a.compareAndSet(this, -5, 7));
189	>	assertEquals(-4, a.get(this));
190	>	assertTrue(a.compareAndSet(this, -4, 7));
191	>	assertEquals(7, a.get(this));
192	>	}
193	>
194	>	/**
195	>	* compareAndSet succeeds in changing protected field value if
196	>	* equal to expected else fails
197	>	*/
198	>	public void testCompareAndSetProtectedInSubclass() {
199	>	AtomicIntegerFieldUpdaterTestSubclass s =
200	>	new AtomicIntegerFieldUpdaterTestSubclass();
201	>	s.checkCompareAndSetProtectedSub();
202	>	}
203	>
204	>	/**
205	>	* compareAndSet in one thread enables another waiting for value
206	>	* to succeed
207	>	*/
208	>	public void testCompareAndSetInMultipleThreads() throws Exception {
209	>	x = 1;
210	>	final AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
211	>	a = updaterFor("x");
212	>
213	>	Thread t = new Thread(new CheckedRunnable() {
214	>	public void realRun() {
215	>	while (!a.compareAndSet(AtomicIntegerFieldUpdaterTest.this, 2, 3))
216	>	Thread.yield();
217	>	}});
218	>
219	>	t.start();
220	>	assertTrue(a.compareAndSet(this, 1, 2));
221	>	t.join(LONG_DELAY_MS);
222	>	assertFalse(t.isAlive());
223	>	assertEquals(3, a.get(this));
224		}
225
226		/**
227	<	*
227	>	* repeated weakCompareAndSet succeeds in changing value when equal
228	>	* to expected
229		*/
230		public void testWeakCompareAndSet() {
231	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
231	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
232	>	a = updaterFor("x");
233		x = 1;
234	<	while(!a.weakCompareAndSet(this,1,2));
235	<	while(!a.weakCompareAndSet(this,2,-4));
236	<	assertEquals(-4,a.get(this));
237	<	while(!a.weakCompareAndSet(this,-4,7));
238	<	assertEquals(7,a.get(this));
234	>	do {} while (!a.weakCompareAndSet(this, 1, 2));
235	>	do {} while (!a.weakCompareAndSet(this, 2, -4));
236	>	assertEquals(-4, a.get(this));
237	>	do {} while (!a.weakCompareAndSet(this, -4, 7));
238	>	assertEquals(7, a.get(this));
239		}
240
241		/**
242	<	*
242	>	* getAndSet returns previous value and sets to given value
243		*/
244		public void testGetAndSet() {
245	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
245	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
246	>	a = updaterFor("x");
247		x = 1;
248	<	assertEquals(1,a.getAndSet(this, 0));
249	<	assertEquals(0,a.getAndSet(this,-10));
250	<	assertEquals(-10,a.getAndSet(this,1));
248	>	assertEquals(1, a.getAndSet(this, 0));
249	>	assertEquals(0, a.getAndSet(this, -10));
250	>	assertEquals(-10, a.getAndSet(this, 1));
251		}
252
253		/**
254	<	*
254	>	* getAndAdd returns previous value and adds given value
255		*/
256		public void testGetAndAdd() {
257	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
257	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
258	>	a = updaterFor("x");
259		x = 1;
260	<	assertEquals(1,a.getAndAdd(this,2));
261	<	assertEquals(3,a.get(this));
262	<	assertEquals(3,a.getAndAdd(this,-4));
263	<	assertEquals(-1,a.get(this));
260	>	assertEquals(1, a.getAndAdd(this, 2));
261	>	assertEquals(3, a.get(this));
262	>	assertEquals(3, a.getAndAdd(this, -4));
263	>	assertEquals(-1, a.get(this));
264		}
265
266		/**
267	<	*
267	>	* getAndDecrement returns previous value and decrements
268		*/
269		public void testGetAndDecrement() {
270	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
270	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
271	>	a = updaterFor("x");
272		x = 1;
273	<	assertEquals(1,a.getAndDecrement(this));
274	<	assertEquals(0,a.getAndDecrement(this));
275	<	assertEquals(-1,a.getAndDecrement(this));
273	>	assertEquals(1, a.getAndDecrement(this));
274	>	assertEquals(0, a.getAndDecrement(this));
275	>	assertEquals(-1, a.getAndDecrement(this));
276		}
277
278		/**
279	<	*
279	>	* getAndIncrement returns previous value and increments
280		*/
281		public void testGetAndIncrement() {
282	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
282	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
283	>	a = updaterFor("x");
284		x = 1;
285	<	assertEquals(1,a.getAndIncrement(this));
286	<	assertEquals(2,a.get(this));
287	<	a.set(this,-2);
288	<	assertEquals(-2,a.getAndIncrement(this));
289	<	assertEquals(-1,a.getAndIncrement(this));
290	<	assertEquals(0,a.getAndIncrement(this));
291	<	assertEquals(1,a.get(this));
285	>	assertEquals(1, a.getAndIncrement(this));
286	>	assertEquals(2, a.get(this));
287	>	a.set(this, -2);
288	>	assertEquals(-2, a.getAndIncrement(this));
289	>	assertEquals(-1, a.getAndIncrement(this));
290	>	assertEquals(0, a.getAndIncrement(this));
291	>	assertEquals(1, a.get(this));
292		}
293
294		/**
295	<	*
295	>	* addAndGet adds given value to current, and returns current value
296		*/
297		public void testAddAndGet() {
298	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
298	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
299	>	a = updaterFor("x");
300		x = 1;
301	<	assertEquals(3,a.addAndGet(this,2));
302	<	assertEquals(3,a.get(this));
303	<	assertEquals(-1,a.addAndGet(this,-4));
304	<	assertEquals(-1,a.get(this));
301	>	assertEquals(3, a.addAndGet(this, 2));
302	>	assertEquals(3, a.get(this));
303	>	assertEquals(-1, a.addAndGet(this, -4));
304	>	assertEquals(-1, a.get(this));
305		}
306
307		/**
308	<	*
308	>	* decrementAndGet decrements and returns current value
309		*/
310		public void testDecrementAndGet() {
311	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
311	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
312	>	a = updaterFor("x");
313		x = 1;
314	<	assertEquals(0,a.decrementAndGet(this));
315	<	assertEquals(-1,a.decrementAndGet(this));
316	<	assertEquals(-2,a.decrementAndGet(this));
317	<	assertEquals(-2,a.get(this));
314	>	assertEquals(0, a.decrementAndGet(this));
315	>	assertEquals(-1, a.decrementAndGet(this));
316	>	assertEquals(-2, a.decrementAndGet(this));
317	>	assertEquals(-2, a.get(this));
318		}
319
320		/**
321	<	*
321	>	* incrementAndGet increments and returns current value
322		*/
323		public void testIncrementAndGet() {
324	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
324	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
325	>	a = updaterFor("x");
326		x = 1;
327	<	assertEquals(2,a.incrementAndGet(this));
328	<	assertEquals(2,a.get(this));
329	<	a.set(this,-2);
330	<	assertEquals(-1,a.incrementAndGet(this));
331	<	assertEquals(0,a.incrementAndGet(this));
332	<	assertEquals(1,a.incrementAndGet(this));
333	<	assertEquals(1,a.get(this));
327	>	assertEquals(2, a.incrementAndGet(this));
328	>	assertEquals(2, a.get(this));
329	>	a.set(this, -2);
330	>	assertEquals(-1, a.incrementAndGet(this));
331	>	assertEquals(0, a.incrementAndGet(this));
332	>	assertEquals(1, a.incrementAndGet(this));
333	>	assertEquals(1, a.get(this));
334		}
335
336		}

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