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Comparing jsr166/src/test/tck/AtomicLongFieldUpdaterTest.java (file contents):
Revision 1.8 by dl, Tue Jan 20 20:20:56 2004 UTC vs.
Revision 1.33 by jsr166, Wed Sep 20 00:41:13 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 java.util.concurrent.atomic.*;
10	<	import junit.framework.*;
11	<	import java.util.*;
9	>	import java.util.concurrent.atomic.AtomicLongFieldUpdater;
10	>
11	>	import junit.framework.Test;
12	>	import junit.framework.TestSuite;
13
14		public class AtomicLongFieldUpdaterTest extends JSR166TestCase {
15		volatile long x = 0;
16	<	int z;
16	>	protected volatile long protectedField;
17	>	private volatile long privateField;
18		long w;
19	<
20	<	public static void main(String[] args){
21	<	junit.textui.TestRunner.run(suite());
19	>	float z;
20	>	public static void main(String[] args) {
21	>	main(suite(), args);
22		}
23		public static Test suite() {
24		return new TestSuite(AtomicLongFieldUpdaterTest.class);
25		}
26
27	+	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> updaterFor(String fieldName) {
28	+	return AtomicLongFieldUpdater.newUpdater
29	+	(AtomicLongFieldUpdaterTest.class, fieldName);
30	+	}
31	+
32		/**
33		* Construction with non-existent field throws RuntimeException
34		*/
35	<	public void testConstructor(){
36	<	try{
37	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>
31	<	a = AtomicLongFieldUpdater.newUpdater
32	<	(AtomicLongFieldUpdaterTest.class, "y");
35	>	public void testConstructor() {
36	>	try {
37	>	updaterFor("y");
38		shouldThrow();
39	+	} catch (RuntimeException success) {
40	+	assertNotNull(success.getCause());
41		}
35	–	catch (RuntimeException rt) {}
42		}
43
44		/**
45	<	* construction with field not of given type throws RuntimeException
45	>	* construction with field not of given type throws IllegalArgumentException
46		*/
47	<	public void testConstructor2(){
48	<	try{
49	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>
44	<	a = AtomicLongFieldUpdater.newUpdater
45	<	(AtomicLongFieldUpdaterTest.class, "z");
47	>	public void testConstructor2() {
48	>	try {
49	>	updaterFor("z");
50		shouldThrow();
51	<	}
48	<	catch (RuntimeException rt) {}
51	>	} catch (IllegalArgumentException success) {}
52		}
53
54		/**
55	<	* construction with non-volatile field throws RuntimeException
55	>	* construction with non-volatile field throws IllegalArgumentException
56		*/
57	<	public void testConstructor3(){
58	<	try{
59	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>
57	<	a = AtomicLongFieldUpdater.newUpdater
58	<	(AtomicLongFieldUpdaterTest.class, "w");
57	>	public void testConstructor3() {
58	>	try {
59	>	updaterFor("w");
60		shouldThrow();
61	<	}
61	>	} catch (IllegalArgumentException success) {}
62	>	}
63	>
64	>	/**
65	>	* construction using private field from subclass throws RuntimeException
66	>	*/
67	>	public void testPrivateFieldInSubclass() {
68	>	new NonNestmates.AtomicLongFieldUpdaterTestSubclass()
69	>	.checkPrivateAccess();
70	>	}
71
72	<	catch (RuntimeException rt) {}
72	>	/**
73	>	* construction from unrelated class; package access is allowed,
74	>	* private access is not
75	>	*/
76	>	public void testUnrelatedClassAccess() {
77	>	new NonNestmates().checkPackageAccess(this);
78	>	new NonNestmates().checkPrivateAccess(this);
79		}
80
81		/**
82	<	*  get returns the last value set or assigned
82	>	* get returns the last value set or assigned
83		*/
84	<	public void testGetSet(){
84	>	public void testGetSet() {
85		AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
86	<	try {
87	<	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
88	<	} catch (RuntimeException ok) {
89	<	return;
90	<	}
86	>	a = updaterFor("x");
87	>	x = 1;
88	>	assertEquals(1, a.get(this));
89	>	a.set(this, 2);
90	>	assertEquals(2, a.get(this));
91	>	a.set(this, -3);
92	>	assertEquals(-3, a.get(this));
93	>	}
94	>
95	>	/**
96	>	* get returns the last value lazySet by same thread
97	>	*/
98	>	public void testGetLazySet() {
99	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
100	>	a = updaterFor("x");
101		x = 1;
102	<	assertEquals(1,a.get(this));
103	<	a.set(this,2);
104	<	assertEquals(2,a.get(this));
105	<	a.set(this,-3);
106	<	assertEquals(-3,a.get(this));
81	<
102	>	assertEquals(1, a.get(this));
103	>	a.lazySet(this, 2);
104	>	assertEquals(2, a.get(this));
105	>	a.lazySet(this, -3);
106	>	assertEquals(-3, a.get(this));
107		}
108	+
109		/**
110		* compareAndSet succeeds in changing value if equal to expected else fails
111		*/
112	<	public void testCompareAndSet(){
112	>	public void testCompareAndSet() {
113		AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
114	<	try {
89	<	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
90	<	} catch (RuntimeException ok) {
91	<	return;
92	<	}
114	>	a = updaterFor("x");
115		x = 1;
116	<	assertTrue(a.compareAndSet(this,1,2));
117	<	assertTrue(a.compareAndSet(this,2,-4));
118	<	assertEquals(-4,a.get(this));
119	<	assertFalse(a.compareAndSet(this,-5,7));
120	<	assertFalse((7 == a.get(this)));
121	<	assertTrue(a.compareAndSet(this,-4,7));
122	<	assertEquals(7,a.get(this));
116	>	assertTrue(a.compareAndSet(this, 1, 2));
117	>	assertTrue(a.compareAndSet(this, 2, -4));
118	>	assertEquals(-4, a.get(this));
119	>	assertFalse(a.compareAndSet(this, -5, 7));
120	>	assertEquals(-4, a.get(this));
121	>	assertTrue(a.compareAndSet(this, -4, 7));
122	>	assertEquals(7, a.get(this));
123		}
124
125	+	/**
126	+	* compareAndSet succeeds in changing protected field value if
127	+	* equal to expected else fails
128	+	*/
129	+	public void testCompareAndSetProtected() {
130	+	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
131	+	a = updaterFor("protectedField");
132	+	protectedField = 1;
133	+	assertTrue(a.compareAndSet(this, 1, 2));
134	+	assertTrue(a.compareAndSet(this, 2, -4));
135	+	assertEquals(-4, a.get(this));
136	+	assertFalse(a.compareAndSet(this, -5, 7));
137	+	assertEquals(-4, a.get(this));
138	+	assertTrue(a.compareAndSet(this, -4, 7));
139	+	assertEquals(7, a.get(this));
140	+	}
141	+
142	+	/**
143	+	* compareAndSet succeeds in changing protected field value if
144	+	* equal to expected else fails
145	+	*/
146	+	public void testCompareAndSetProtectedInSubclass() {
147	+	NonNestmates.AtomicLongFieldUpdaterTestSubclass s =
148	+	new NonNestmates.AtomicLongFieldUpdaterTestSubclass();
149	+	s.checkCompareAndSetProtectedSub();
150	+	}
151
152		/**
153		* compareAndSet in one thread enables another waiting for value
154		* to succeed
155		*/
156	<	public void testCompareAndSetInMultipleThreads() {
156	>	public void testCompareAndSetInMultipleThreads() throws Exception {
157		x = 1;
158	<	final AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>a;
159	<	try {
112	<	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
113	<	} catch (RuntimeException ok) {
114	<	return;
115	<	}
158	>	final AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
159	>	a = updaterFor("x");
160
161	<	Thread t = new Thread(new Runnable() {
162	<	public void run() {
163	<	while(!a.compareAndSet(AtomicLongFieldUpdaterTest.this, 2, 3)) Thread.yield();
164	<	}});
165	<	try {
166	<	t.start();
167	<	assertTrue(a.compareAndSet(this, 1, 2));
168	<	t.join(LONG_DELAY_MS);
169	<	assertFalse(t.isAlive());
170	<	assertEquals(a.get(this), 3);
171	<	}
128	<	catch(Exception e) {
129	<	unexpectedException();
130	<	}
161	>	Thread t = new Thread(new CheckedRunnable() {
162	>	public void realRun() {
163	>	while (!a.compareAndSet(AtomicLongFieldUpdaterTest.this, 2, 3))
164	>	Thread.yield();
165	>	}});
166	>
167	>	t.start();
168	>	assertTrue(a.compareAndSet(this, 1, 2));
169	>	t.join(LONG_DELAY_MS);
170	>	assertFalse(t.isAlive());
171	>	assertEquals(3, a.get(this));
172		}
173
174		/**
175		* repeated weakCompareAndSet succeeds in changing value when equal
176	<	* to expected
176	>	* to expected
177		*/
178	<	public void testWeakCompareAndSet(){
178	>	public void testWeakCompareAndSet() {
179		AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
180	<	try {
140	<	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
141	<	} catch (RuntimeException ok) {
142	<	return;
143	<	}
180	>	a = updaterFor("x");
181		x = 1;
182	<	while(!a.weakCompareAndSet(this,1,2));
183	<	while(!a.weakCompareAndSet(this,2,-4));
184	<	assertEquals(-4,a.get(this));
185	<	while(!a.weakCompareAndSet(this,-4,7));
186	<	assertEquals(7,a.get(this));
182	>	do {} while (!a.weakCompareAndSet(this, 1, 2));
183	>	do {} while (!a.weakCompareAndSet(this, 2, -4));
184	>	assertEquals(-4, a.get(this));
185	>	do {} while (!a.weakCompareAndSet(this, -4, 7));
186	>	assertEquals(7, a.get(this));
187		}
188
189		/**
190	<	*  getAndSet returns previous value and sets to given value
190	>	* getAndSet returns previous value and sets to given value
191		*/
192	<	public void testGetAndSet(){
192	>	public void testGetAndSet() {
193		AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
194	<	try {
158	<	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
159	<	} catch (RuntimeException ok) {
160	<	return;
161	<	}
194	>	a = updaterFor("x");
195		x = 1;
196	<	assertEquals(1,a.getAndSet(this, 0));
197	<	assertEquals(0,a.getAndSet(this,-10));
198	<	assertEquals(-10,a.getAndSet(this,1));
196	>	assertEquals(1, a.getAndSet(this, 0));
197	>	assertEquals(0, a.getAndSet(this, -10));
198	>	assertEquals(-10, a.getAndSet(this, 1));
199		}
200
201		/**
202		* getAndAdd returns previous value and adds given value
203		*/
204	<	public void testGetAndAdd(){
204	>	public void testGetAndAdd() {
205		AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
206	<	try {
174	<	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
175	<	} catch (RuntimeException ok) {
176	<	return;
177	<	}
206	>	a = updaterFor("x");
207		x = 1;
208	<	assertEquals(1,a.getAndAdd(this,2));
209	<	assertEquals(3,a.get(this));
210	<	assertEquals(3,a.getAndAdd(this,-4));
211	<	assertEquals(-1,a.get(this));
208	>	assertEquals(1, a.getAndAdd(this, 2));
209	>	assertEquals(3, a.get(this));
210	>	assertEquals(3, a.getAndAdd(this, -4));
211	>	assertEquals(-1, a.get(this));
212		}
213
214		/**
215		* getAndDecrement returns previous value and decrements
216		*/
217	<	public void testGetAndDecrement(){
217	>	public void testGetAndDecrement() {
218		AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
219	<	try {
191	<	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
192	<	} catch (RuntimeException ok) {
193	<	return;
194	<	}
219	>	a = updaterFor("x");
220		x = 1;
221	<	assertEquals(1,a.getAndDecrement(this));
222	<	assertEquals(0,a.getAndDecrement(this));
223	<	assertEquals(-1,a.getAndDecrement(this));
221	>	assertEquals(1, a.getAndDecrement(this));
222	>	assertEquals(0, a.getAndDecrement(this));
223	>	assertEquals(-1, a.getAndDecrement(this));
224		}
225
226		/**
227		* getAndIncrement returns previous value and increments
228		*/
229	<	public void testGetAndIncrement(){
229	>	public void testGetAndIncrement() {
230		AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
231	<	try {
207	<	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
208	<	} catch (RuntimeException ok) {
209	<	return;
210	<	}
231	>	a = updaterFor("x");
232		x = 1;
233	<	assertEquals(1,a.getAndIncrement(this));
234	<	assertEquals(2,a.get(this));
235	<	a.set(this,-2);
236	<	assertEquals(-2,a.getAndIncrement(this));
237	<	assertEquals(-1,a.getAndIncrement(this));
238	<	assertEquals(0,a.getAndIncrement(this));
239	<	assertEquals(1,a.get(this));
233	>	assertEquals(1, a.getAndIncrement(this));
234	>	assertEquals(2, a.get(this));
235	>	a.set(this, -2);
236	>	assertEquals(-2, a.getAndIncrement(this));
237	>	assertEquals(-1, a.getAndIncrement(this));
238	>	assertEquals(0, a.getAndIncrement(this));
239	>	assertEquals(1, a.get(this));
240		}
241
242		/**
243		* addAndGet adds given value to current, and returns current value
244		*/
245	<	public void testAddAndGet(){
245	>	public void testAddAndGet() {
246		AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
247	<	try {
227	<	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
228	<	} catch (RuntimeException ok) {
229	<	return;
230	<	}
247	>	a = updaterFor("x");
248		x = 1;
249	<	assertEquals(3,a.addAndGet(this,2));
250	<	assertEquals(3,a.get(this));
251	<	assertEquals(-1,a.addAndGet(this,-4));
252	<	assertEquals(-1,a.get(this));
249	>	assertEquals(3, a.addAndGet(this, 2));
250	>	assertEquals(3, a.get(this));
251	>	assertEquals(-1, a.addAndGet(this, -4));
252	>	assertEquals(-1, a.get(this));
253		}
254
255		/**
256	<	*  decrementAndGet decrements and returns current value
256	>	* decrementAndGet decrements and returns current value
257		*/
258	<	public void testDecrementAndGet(){
258	>	public void testDecrementAndGet() {
259		AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
260	<	try {
244	<	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
245	<	} catch (RuntimeException ok) {
246	<	return;
247	<	}
260	>	a = updaterFor("x");
261		x = 1;
262	<	assertEquals(0,a.decrementAndGet(this));
263	<	assertEquals(-1,a.decrementAndGet(this));
264	<	assertEquals(-2,a.decrementAndGet(this));
265	<	assertEquals(-2,a.get(this));
262	>	assertEquals(0, a.decrementAndGet(this));
263	>	assertEquals(-1, a.decrementAndGet(this));
264	>	assertEquals(-2, a.decrementAndGet(this));
265	>	assertEquals(-2, a.get(this));
266		}
267
268		/**
269		* incrementAndGet increments and returns current value
270		*/
271	<	public void testIncrementAndGet(){
271	>	public void testIncrementAndGet() {
272		AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
273	<	try {
261	<	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
262	<	} catch (RuntimeException ok) {
263	<	return;
264	<	}
273	>	a = updaterFor("x");
274		x = 1;
275	<	assertEquals(2,a.incrementAndGet(this));
276	<	assertEquals(2,a.get(this));
277	<	a.set(this,-2);
278	<	assertEquals(-1,a.incrementAndGet(this));
279	<	assertEquals(0,a.incrementAndGet(this));
280	<	assertEquals(1,a.incrementAndGet(this));
281	<	assertEquals(1,a.get(this));
275	>	assertEquals(2, a.incrementAndGet(this));
276	>	assertEquals(2, a.get(this));
277	>	a.set(this, -2);
278	>	assertEquals(-1, a.incrementAndGet(this));
279	>	assertEquals(0, a.incrementAndGet(this));
280	>	assertEquals(1, a.incrementAndGet(this));
281	>	assertEquals(1, a.get(this));
282		}
283
284		}

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