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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 1.25 by jsr166, Tue Apr 2 04:11:28 2013 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
8	–	import java.util.concurrent.atomic.*;
9		import junit.framework.*;
10	<	import java.util.*;
10	>	import java.util.concurrent.atomic.AtomicIntegerFieldUpdater;
11
12		public class AtomicIntegerFieldUpdaterTest extends JSR166TestCase {
13		volatile int x = 0;
14	+	int w;
15		long z;
16	<
16	<	public static void main(String[] args){
16	>	public static void main(String[] args) {
17		junit.textui.TestRunner.run(suite());
18		}
19	–
20	–
19		public static Test suite() {
20		return new TestSuite(AtomicIntegerFieldUpdaterTest.class);
21		}
22
23	+	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> updaterFor(String fieldName) {
24	+	return AtomicIntegerFieldUpdater.newUpdater
25	+	(AtomicIntegerFieldUpdaterTest.class, fieldName);
26	+	}
27	+
28		/**
29	<	*
29	>	* Construction with non-existent field throws RuntimeException
30		*/
31		public void testConstructor() {
32	<	try{
33	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest>
31	<	a = AtomicIntegerFieldUpdater.newUpdater
32	<	(getClass(), "y");
32	>	try {
33	>	updaterFor("y");
34		shouldThrow();
35	+	} catch (RuntimeException success) {
36	+	assertTrue(success.getCause() != null);
37		}
35	–	catch (RuntimeException rt) {}
38		}
39
40		/**
41	<	*
41	>	* construction with field not of given type throws IllegalArgumentException
42		*/
43		public void testConstructor2() {
44	<	try{
45	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest>
44	<	a = AtomicIntegerFieldUpdater.newUpdater
45	<	(getClass(), "z");
44	>	try {
45	>	updaterFor("z");
46		shouldThrow();
47	<	}
48	<	catch (RuntimeException rt) {}
47	>	} catch (IllegalArgumentException success) {}
48	>	}
49	>
50	>	/**
51	>	* construction with non-volatile field throws IllegalArgumentException
52	>	*/
53	>	public void testConstructor3() {
54	>	try {
55	>	updaterFor("w");
56	>	shouldThrow();
57	>	} catch (IllegalArgumentException success) {}
58		}
59
60		/**
61	<	*
61	>	* get returns the last value set or assigned
62		*/
63		public void testGetSet() {
64	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
64	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
65	>	a = updaterFor("x");
66		x = 1;
67	<	assertEquals(1,a.get(this));
68	<	a.set(this,2);
69	<	assertEquals(2,a.get(this));
70	<	a.set(this,-3);
71	<	assertEquals(-3,a.get(this));
62	<
67	>	assertEquals(1, a.get(this));
68	>	a.set(this, 2);
69	>	assertEquals(2, a.get(this));
70	>	a.set(this, -3);
71	>	assertEquals(-3, a.get(this));
72		}
73	+
74		/**
75	<	*
75	>	* get returns the last value lazySet by same thread
76	>	*/
77	>	public void testGetLazySet() {
78	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
79	>	a = updaterFor("x");
80	>	x = 1;
81	>	assertEquals(1, a.get(this));
82	>	a.lazySet(this, 2);
83	>	assertEquals(2, a.get(this));
84	>	a.lazySet(this, -3);
85	>	assertEquals(-3, a.get(this));
86	>	}
87	>
88	>	/**
89	>	* compareAndSet succeeds in changing value if equal to expected else fails
90		*/
91		public void testCompareAndSet() {
92	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
92	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
93	>	a = updaterFor("x");
94		x = 1;
95	<	assertTrue(a.compareAndSet(this,1,2));
96	<	assertTrue(a.compareAndSet(this,2,-4));
97	<	assertEquals(-4,a.get(this));
98	<	assertFalse(a.compareAndSet(this,-5,7));
99	<	assertFalse((7 == a.get(this)));
100	<	assertTrue(a.compareAndSet(this,-4,7));
101	<	assertEquals(7,a.get(this));
95	>	assertTrue(a.compareAndSet(this, 1, 2));
96	>	assertTrue(a.compareAndSet(this, 2, -4));
97	>	assertEquals(-4, a.get(this));
98	>	assertFalse(a.compareAndSet(this, -5, 7));
99	>	assertEquals(-4, a.get(this));
100	>	assertTrue(a.compareAndSet(this, -4, 7));
101	>	assertEquals(7, a.get(this));
102	>	}
103	>
104	>	/**
105	>	* compareAndSet in one thread enables another waiting for value
106	>	* to succeed
107	>	*/
108	>	public void testCompareAndSetInMultipleThreads() throws Exception {
109	>	x = 1;
110	>	final AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
111	>	a = updaterFor("x");
112	>
113	>	Thread t = new Thread(new CheckedRunnable() {
114	>	public void realRun() {
115	>	while (!a.compareAndSet(AtomicIntegerFieldUpdaterTest.this, 2, 3))
116	>	Thread.yield();
117	>	}});
118	>
119	>	t.start();
120	>	assertTrue(a.compareAndSet(this, 1, 2));
121	>	t.join(LONG_DELAY_MS);
122	>	assertFalse(t.isAlive());
123	>	assertEquals(3, a.get(this));
124		}
125
126		/**
127	<	*
127	>	* repeated weakCompareAndSet succeeds in changing value when equal
128	>	* to expected
129		*/
130		public void testWeakCompareAndSet() {
131	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
131	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
132	>	a = updaterFor("x");
133		x = 1;
134	<	while(!a.weakCompareAndSet(this,1,2));
135	<	while(!a.weakCompareAndSet(this,2,-4));
136	<	assertEquals(-4,a.get(this));
137	<	while(!a.weakCompareAndSet(this,-4,7));
138	<	assertEquals(7,a.get(this));
134	>	while (!a.weakCompareAndSet(this, 1, 2));
135	>	while (!a.weakCompareAndSet(this, 2, -4));
136	>	assertEquals(-4, a.get(this));
137	>	while (!a.weakCompareAndSet(this, -4, 7));
138	>	assertEquals(7, a.get(this));
139		}
140
141		/**
142	<	*
142	>	* getAndSet returns previous value and sets to given value
143		*/
144		public void testGetAndSet() {
145	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
145	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
146	>	a = updaterFor("x");
147		x = 1;
148	<	assertEquals(1,a.getAndSet(this, 0));
149	<	assertEquals(0,a.getAndSet(this,-10));
150	<	assertEquals(-10,a.getAndSet(this,1));
148	>	assertEquals(1, a.getAndSet(this, 0));
149	>	assertEquals(0, a.getAndSet(this, -10));
150	>	assertEquals(-10, a.getAndSet(this, 1));
151		}
152
153		/**
154	<	*
154	>	* getAndAdd returns previous value and adds given value
155		*/
156		public void testGetAndAdd() {
157	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
157	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
158	>	a = updaterFor("x");
159		x = 1;
160	<	assertEquals(1,a.getAndAdd(this,2));
161	<	assertEquals(3,a.get(this));
162	<	assertEquals(3,a.getAndAdd(this,-4));
163	<	assertEquals(-1,a.get(this));
160	>	assertEquals(1, a.getAndAdd(this, 2));
161	>	assertEquals(3, a.get(this));
162	>	assertEquals(3, a.getAndAdd(this, -4));
163	>	assertEquals(-1, a.get(this));
164		}
165
166		/**
167	<	*
167	>	* getAndDecrement returns previous value and decrements
168		*/
169		public void testGetAndDecrement() {
170	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
170	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
171	>	a = updaterFor("x");
172		x = 1;
173	<	assertEquals(1,a.getAndDecrement(this));
174	<	assertEquals(0,a.getAndDecrement(this));
175	<	assertEquals(-1,a.getAndDecrement(this));
173	>	assertEquals(1, a.getAndDecrement(this));
174	>	assertEquals(0, a.getAndDecrement(this));
175	>	assertEquals(-1, a.getAndDecrement(this));
176		}
177
178		/**
179	<	*
179	>	* getAndIncrement returns previous value and increments
180		*/
181		public void testGetAndIncrement() {
182	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
182	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
183	>	a = updaterFor("x");
184		x = 1;
185	<	assertEquals(1,a.getAndIncrement(this));
186	<	assertEquals(2,a.get(this));
187	<	a.set(this,-2);
188	<	assertEquals(-2,a.getAndIncrement(this));
189	<	assertEquals(-1,a.getAndIncrement(this));
190	<	assertEquals(0,a.getAndIncrement(this));
191	<	assertEquals(1,a.get(this));
185	>	assertEquals(1, a.getAndIncrement(this));
186	>	assertEquals(2, a.get(this));
187	>	a.set(this, -2);
188	>	assertEquals(-2, a.getAndIncrement(this));
189	>	assertEquals(-1, a.getAndIncrement(this));
190	>	assertEquals(0, a.getAndIncrement(this));
191	>	assertEquals(1, a.get(this));
192		}
193
194		/**
195	<	*
195	>	* addAndGet adds given value to current, and returns current value
196		*/
197		public void testAddAndGet() {
198	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
198	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
199	>	a = updaterFor("x");
200		x = 1;
201	<	assertEquals(3,a.addAndGet(this,2));
202	<	assertEquals(3,a.get(this));
203	<	assertEquals(-1,a.addAndGet(this,-4));
204	<	assertEquals(-1,a.get(this));
201	>	assertEquals(3, a.addAndGet(this, 2));
202	>	assertEquals(3, a.get(this));
203	>	assertEquals(-1, a.addAndGet(this, -4));
204	>	assertEquals(-1, a.get(this));
205		}
206
207		/**
208	<	*
208	>	* decrementAndGet decrements and returns current value
209		*/
210		public void testDecrementAndGet() {
211	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
211	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
212	>	a = updaterFor("x");
213		x = 1;
214	<	assertEquals(0,a.decrementAndGet(this));
215	<	assertEquals(-1,a.decrementAndGet(this));
216	<	assertEquals(-2,a.decrementAndGet(this));
217	<	assertEquals(-2,a.get(this));
214	>	assertEquals(0, a.decrementAndGet(this));
215	>	assertEquals(-1, a.decrementAndGet(this));
216	>	assertEquals(-2, a.decrementAndGet(this));
217	>	assertEquals(-2, a.get(this));
218		}
219
220		/**
221	<	*
221	>	* incrementAndGet increments and returns current value
222		*/
223		public void testIncrementAndGet() {
224	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
224	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
225	>	a = updaterFor("x");
226		x = 1;
227	<	assertEquals(2,a.incrementAndGet(this));
228	<	assertEquals(2,a.get(this));
229	<	a.set(this,-2);
230	<	assertEquals(-1,a.incrementAndGet(this));
231	<	assertEquals(0,a.incrementAndGet(this));
232	<	assertEquals(1,a.incrementAndGet(this));
233	<	assertEquals(1,a.get(this));
227	>	assertEquals(2, a.incrementAndGet(this));
228	>	assertEquals(2, a.get(this));
229	>	a.set(this, -2);
230	>	assertEquals(-1, a.incrementAndGet(this));
231	>	assertEquals(0, a.incrementAndGet(this));
232	>	assertEquals(1, a.incrementAndGet(this));
233	>	assertEquals(1, a.get(this));
234		}
235
236		}

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