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

Comparing jsr166/src/test/tck/AtomicLongFieldUpdaterTest.java (file contents):
Revision 1.1 by dl, Sun Aug 31 19:24:53 2003 UTC vs.
Revision 1.33 by jsr166, Wed Sep 20 00:41:13 2017 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.*;
9	<	import junit.framework.*;
10	<	import java.util.*;
9	>	import java.util.concurrent.atomic.AtomicLongFieldUpdater;
10
11	<	public class AtomicLongFieldUpdaterTest extends TestCase{
12	<	volatile long x = 0;
14	<	long z;
15	<	int w;
11	>	import junit.framework.Test;
12	>	import junit.framework.TestSuite;
13
14	<	public static void main(String[] args){
15	<	junit.textui.TestRunner.run(suite());
14	>	public class AtomicLongFieldUpdaterTest extends JSR166TestCase {
15	>	volatile long x = 0;
16	>	protected volatile long protectedField;
17	>	private volatile long privateField;
18	>	long w;
19	>	float z;
20	>	public static void main(String[] args) {
21	>	main(suite(), args);
22		}
20	–
21	–
23		public static Test suite() {
24		return new TestSuite(AtomicLongFieldUpdaterTest.class);
25		}
26
27	<	public void testConstructor(){
28	<	try{
29	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>
29	<	a = AtomicLongFieldUpdater.newUpdater
30	<	(getClass(), "y");
31	<	fail("Exception not thrown");
32	<	}
33	<
34	<	catch (RuntimeException rt) {}
27	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> updaterFor(String fieldName) {
28	>	return AtomicLongFieldUpdater.newUpdater
29	>	(AtomicLongFieldUpdaterTest.class, fieldName);
30		}
31
32	<	public void testConstructor2(){
33	<	try{
34	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>
35	<	a = AtomicLongFieldUpdater.newUpdater
36	<	(getClass(), "z");
37	<	fail("Exception not thrown");
32	>	/**
33	>	* Construction with non-existent field throws RuntimeException
34	>	*/
35	>	public void testConstructor() {
36	>	try {
37	>	updaterFor("y");
38	>	shouldThrow();
39	>	} catch (RuntimeException success) {
40	>	assertNotNull(success.getCause());
41		}
44	–
45	–	catch (RuntimeException rt) {}
42		}
43
44	<	public void testConstructor3(){
45	<	try{
46	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>
47	<	a = AtomicLongFieldUpdater.newUpdater
48	<	(getClass(), "w");
49	<	fail("Exception not thrown");
50	<	}
51	<
52	<	catch (RuntimeException rt) {}
44	>	/**
45	>	* construction with field not of given type throws IllegalArgumentException
46	>	*/
47	>	public void testConstructor2() {
48	>	try {
49	>	updaterFor("z");
50	>	shouldThrow();
51	>	} catch (IllegalArgumentException success) {}
52	>	}
53	>
54	>	/**
55	>	* construction with non-volatile field throws IllegalArgumentException
56	>	*/
57	>	public void testConstructor3() {
58	>	try {
59	>	updaterFor("w");
60	>	shouldThrow();
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	>	/**
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
83	>	*/
84	>	public void testGetSet() {
85	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
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	<	public void testGetSet(){
96	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
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));
67	<
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	<	public void testCompareAndSet(){
109	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
108	>
109	>	/**
110	>	* compareAndSet succeeds in changing value if equal to expected else fails
111	>	*/
112	>	public void testCompareAndSet() {
113	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
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));
123	<	}
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() throws Exception {
157	>	x = 1;
158	>	final AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
159	>	a = updaterFor("x");
160
161	<	public void testWeakCompareAndSet(){
162	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
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
177	>	*/
178	>	public void testWeakCompareAndSet() {
179	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
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	<	public void testGetAndSet(){
190	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
189	>	/**
190	>	* getAndSet returns previous value and sets to given value
191	>	*/
192	>	public void testGetAndSet() {
193	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
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	<	public void testGetAndAdd(){
202	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
201	>	/**
202	>	* getAndAdd returns previous value and adds given value
203	>	*/
204	>	public void testGetAndAdd() {
205	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
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	<	public void testGetAndDecrement(){
215	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
214	>	/**
215	>	* getAndDecrement returns previous value and decrements
216	>	*/
217	>	public void testGetAndDecrement() {
218	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
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	<	public void testGetAndIncrement(){
227	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
226	>	/**
227	>	* getAndIncrement returns previous value and increments
228	>	*/
229	>	public void testGetAndIncrement() {
230	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
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	<	public void testAddAndGet(){
243	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
242	>	/**
243	>	* addAndGet adds given value to current, and returns current value
244	>	*/
245	>	public void testAddAndGet() {
246	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
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	<	public void testDecrementAndGet(){
256	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
255	>	/**
256	>	* decrementAndGet decrements and returns current value
257	>	*/
258	>	public void testDecrementAndGet() {
259	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
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	<	public void testIncrementAndGet(){
269	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
268	>	/**
269	>	* incrementAndGet increments and returns current value
270	>	*/
271	>	public void testIncrementAndGet() {
272	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
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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