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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 1.34 by jsr166, Wed Sep 20 00:59:17 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	+	new NonNestmates.AtomicLongFieldUpdaterTestSubclass()
148	+	.checkCompareAndSetProtectedSub();
149	+	}
150
151		/**
152		* compareAndSet in one thread enables another waiting for value
153		* to succeed
154		*/
155	<	public void testCompareAndSetInMultipleThreads() {
155	>	public void testCompareAndSetInMultipleThreads() throws Exception {
156		x = 1;
157	<	final AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>a;
158	<	try {
112	<	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
113	<	} catch (RuntimeException ok) {
114	<	return;
115	<	}
157	>	final AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
158	>	a = updaterFor("x");
159
160	<	Thread t = new Thread(new Runnable() {
161	<	public void run() {
162	<	while(!a.compareAndSet(AtomicLongFieldUpdaterTest.this, 2, 3)) Thread.yield();
163	<	}});
164	<	try {
165	<	t.start();
166	<	assertTrue(a.compareAndSet(this, 1, 2));
167	<	t.join(LONG_DELAY_MS);
168	<	assertFalse(t.isAlive());
169	<	assertEquals(a.get(this), 3);
170	<	}
128	<	catch(Exception e) {
129	<	unexpectedException();
130	<	}
160	>	Thread t = new Thread(new CheckedRunnable() {
161	>	public void realRun() {
162	>	while (!a.compareAndSet(AtomicLongFieldUpdaterTest.this, 2, 3))
163	>	Thread.yield();
164	>	}});
165	>
166	>	t.start();
167	>	assertTrue(a.compareAndSet(this, 1, 2));
168	>	t.join(LONG_DELAY_MS);
169	>	assertFalse(t.isAlive());
170	>	assertEquals(3, a.get(this));
171		}
172
173		/**
174		* repeated weakCompareAndSet succeeds in changing value when equal
175	<	* to expected
175	>	* to expected
176		*/
177	<	public void testWeakCompareAndSet(){
177	>	public void testWeakCompareAndSet() {
178		AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
179	<	try {
140	<	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
141	<	} catch (RuntimeException ok) {
142	<	return;
143	<	}
179	>	a = updaterFor("x");
180		x = 1;
181	<	while(!a.weakCompareAndSet(this,1,2));
182	<	while(!a.weakCompareAndSet(this,2,-4));
183	<	assertEquals(-4,a.get(this));
184	<	while(!a.weakCompareAndSet(this,-4,7));
185	<	assertEquals(7,a.get(this));
181	>	do {} while (!a.weakCompareAndSet(this, 1, 2));
182	>	do {} while (!a.weakCompareAndSet(this, 2, -4));
183	>	assertEquals(-4, a.get(this));
184	>	do {} while (!a.weakCompareAndSet(this, -4, 7));
185	>	assertEquals(7, a.get(this));
186		}
187
188		/**
189	<	*  getAndSet returns previous value and sets to given value
189	>	* getAndSet returns previous value and sets to given value
190		*/
191	<	public void testGetAndSet(){
191	>	public void testGetAndSet() {
192		AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
193	<	try {
158	<	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
159	<	} catch (RuntimeException ok) {
160	<	return;
161	<	}
193	>	a = updaterFor("x");
194		x = 1;
195	<	assertEquals(1,a.getAndSet(this, 0));
196	<	assertEquals(0,a.getAndSet(this,-10));
197	<	assertEquals(-10,a.getAndSet(this,1));
195	>	assertEquals(1, a.getAndSet(this, 0));
196	>	assertEquals(0, a.getAndSet(this, -10));
197	>	assertEquals(-10, a.getAndSet(this, 1));
198		}
199
200		/**
201		* getAndAdd returns previous value and adds given value
202		*/
203	<	public void testGetAndAdd(){
203	>	public void testGetAndAdd() {
204		AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
205	<	try {
174	<	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
175	<	} catch (RuntimeException ok) {
176	<	return;
177	<	}
205	>	a = updaterFor("x");
206		x = 1;
207	<	assertEquals(1,a.getAndAdd(this,2));
208	<	assertEquals(3,a.get(this));
209	<	assertEquals(3,a.getAndAdd(this,-4));
210	<	assertEquals(-1,a.get(this));
207	>	assertEquals(1, a.getAndAdd(this, 2));
208	>	assertEquals(3, a.get(this));
209	>	assertEquals(3, a.getAndAdd(this, -4));
210	>	assertEquals(-1, a.get(this));
211		}
212
213		/**
214		* getAndDecrement returns previous value and decrements
215		*/
216	<	public void testGetAndDecrement(){
216	>	public void testGetAndDecrement() {
217		AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
218	<	try {
191	<	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
192	<	} catch (RuntimeException ok) {
193	<	return;
194	<	}
218	>	a = updaterFor("x");
219		x = 1;
220	<	assertEquals(1,a.getAndDecrement(this));
221	<	assertEquals(0,a.getAndDecrement(this));
222	<	assertEquals(-1,a.getAndDecrement(this));
220	>	assertEquals(1, a.getAndDecrement(this));
221	>	assertEquals(0, a.getAndDecrement(this));
222	>	assertEquals(-1, a.getAndDecrement(this));
223		}
224
225		/**
226		* getAndIncrement returns previous value and increments
227		*/
228	<	public void testGetAndIncrement(){
228	>	public void testGetAndIncrement() {
229		AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
230	<	try {
207	<	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
208	<	} catch (RuntimeException ok) {
209	<	return;
210	<	}
230	>	a = updaterFor("x");
231		x = 1;
232	<	assertEquals(1,a.getAndIncrement(this));
233	<	assertEquals(2,a.get(this));
234	<	a.set(this,-2);
235	<	assertEquals(-2,a.getAndIncrement(this));
236	<	assertEquals(-1,a.getAndIncrement(this));
237	<	assertEquals(0,a.getAndIncrement(this));
238	<	assertEquals(1,a.get(this));
232	>	assertEquals(1, a.getAndIncrement(this));
233	>	assertEquals(2, a.get(this));
234	>	a.set(this, -2);
235	>	assertEquals(-2, a.getAndIncrement(this));
236	>	assertEquals(-1, a.getAndIncrement(this));
237	>	assertEquals(0, a.getAndIncrement(this));
238	>	assertEquals(1, a.get(this));
239		}
240
241		/**
242		* addAndGet adds given value to current, and returns current value
243		*/
244	<	public void testAddAndGet(){
244	>	public void testAddAndGet() {
245		AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
246	<	try {
227	<	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
228	<	} catch (RuntimeException ok) {
229	<	return;
230	<	}
246	>	a = updaterFor("x");
247		x = 1;
248	<	assertEquals(3,a.addAndGet(this,2));
249	<	assertEquals(3,a.get(this));
250	<	assertEquals(-1,a.addAndGet(this,-4));
251	<	assertEquals(-1,a.get(this));
248	>	assertEquals(3, a.addAndGet(this, 2));
249	>	assertEquals(3, a.get(this));
250	>	assertEquals(-1, a.addAndGet(this, -4));
251	>	assertEquals(-1, a.get(this));
252		}
253
254		/**
255	<	*  decrementAndGet decrements and returns current value
255	>	* decrementAndGet decrements and returns current value
256		*/
257	<	public void testDecrementAndGet(){
257	>	public void testDecrementAndGet() {
258		AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
259	<	try {
244	<	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
245	<	} catch (RuntimeException ok) {
246	<	return;
247	<	}
259	>	a = updaterFor("x");
260		x = 1;
261	<	assertEquals(0,a.decrementAndGet(this));
262	<	assertEquals(-1,a.decrementAndGet(this));
263	<	assertEquals(-2,a.decrementAndGet(this));
264	<	assertEquals(-2,a.get(this));
261	>	assertEquals(0, a.decrementAndGet(this));
262	>	assertEquals(-1, a.decrementAndGet(this));
263	>	assertEquals(-2, a.decrementAndGet(this));
264	>	assertEquals(-2, a.get(this));
265		}
266
267		/**
268		* incrementAndGet increments and returns current value
269		*/
270	<	public void testIncrementAndGet(){
270	>	public void testIncrementAndGet() {
271		AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
272	<	try {
261	<	a = AtomicLongFieldUpdater.newUpdater(AtomicLongFieldUpdaterTest.class, "x");
262	<	} catch (RuntimeException ok) {
263	<	return;
264	<	}
272	>	a = updaterFor("x");
273		x = 1;
274	<	assertEquals(2,a.incrementAndGet(this));
275	<	assertEquals(2,a.get(this));
276	<	a.set(this,-2);
277	<	assertEquals(-1,a.incrementAndGet(this));
278	<	assertEquals(0,a.incrementAndGet(this));
279	<	assertEquals(1,a.incrementAndGet(this));
280	<	assertEquals(1,a.get(this));
274	>	assertEquals(2, a.incrementAndGet(this));
275	>	assertEquals(2, a.get(this));
276	>	a.set(this, -2);
277	>	assertEquals(-1, a.incrementAndGet(this));
278	>	assertEquals(0, a.incrementAndGet(this));
279	>	assertEquals(1, a.incrementAndGet(this));
280	>	assertEquals(1, a.get(this));
281		}
282
283		}

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