ViewVC Help

View File | Revision Log | Show Annotations | Download File | Root Listing

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

Comparing jsr166/src/test/tck/AtomicIntegerFieldUpdaterTest.java (file contents):
Revision 1.2 by dl, Sun Sep 14 20:42:40 2003 UTC vs.
Revision 1.28 by jsr166, Wed Dec 31 19:21:20 2014 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	+	int w;
17		long z;
18	<
16	<	public static void main(String[] args){
18	>	public static void main(String[] args) {
19		junit.textui.TestRunner.run(suite());
20		}
19	–
20	–
21		public static Test suite() {
22		return new TestSuite(AtomicIntegerFieldUpdaterTest.class);
23		}
24
25	<	public void testConstructor(){
26	<	try{
27	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest>
28	<	a = AtomicIntegerFieldUpdater.newUpdater
29	<	(getClass(), "y");
30	<	fail("Exception not thrown");
31	<	}
32	<	catch (RuntimeException rt) {}
25	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> updaterFor(String fieldName) {
26	>	return AtomicIntegerFieldUpdater.newUpdater
27	>	(AtomicIntegerFieldUpdaterTest.class, fieldName);
28		}
29
30	<	public void testConstructor2(){
31	<	try{
32	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest>
33	<	a = AtomicIntegerFieldUpdater.newUpdater
34	<	(getClass(), "z");
35	<	fail("Exception not thrown");
30	>	/**
31	>	* Construction with non-existent field throws RuntimeException
32	>	*/
33	>	public void testConstructor() {
34	>	try {
35	>	updaterFor("y");
36	>	shouldThrow();
37	>	} catch (RuntimeException success) {
38	>	assertNotNull(success.getCause());
39		}
42	–	catch (RuntimeException rt) {}
43	–	}
44	–
45	–	public void testGetSet(){
46	–	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
47	–	x = 1;
48	–	assertEquals(1,a.get(this));
49	–	a.set(this,2);
50	–	assertEquals(2,a.get(this));
51	–	a.set(this,-3);
52	–	assertEquals(-3,a.get(this));
53	–
54	–	}
55	–	public void testCompareAndSet(){
56	–	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
57	–	x = 1;
58	–	assertTrue(a.compareAndSet(this,1,2));
59	–	assertTrue(a.compareAndSet(this,2,-4));
60	–	assertEquals(-4,a.get(this));
61	–	assertFalse(a.compareAndSet(this,-5,7));
62	–	assertFalse((7 == a.get(this)));
63	–	assertTrue(a.compareAndSet(this,-4,7));
64	–	assertEquals(7,a.get(this));
65	–	}
66	–
67	–	public void testWeakCompareAndSet(){
68	–	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
69	–	x = 1;
70	–	while(!a.weakCompareAndSet(this,1,2));
71	–	while(!a.weakCompareAndSet(this,2,-4));
72	–	assertEquals(-4,a.get(this));
73	–	while(!a.weakCompareAndSet(this,-4,7));
74	–	assertEquals(7,a.get(this));
40		}
41
42	<	public void testGetAndSet(){
43	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
44	<	x = 1;
45	<	assertEquals(1,a.getAndSet(this, 0));
46	<	assertEquals(0,a.getAndSet(this,-10));
47	<	assertEquals(-10,a.getAndSet(this,1));
48	<	}
49	<
50	<	public void testGetAndAdd(){
51	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
52	<	x = 1;
53	<	assertEquals(1,a.getAndAdd(this,2));
54	<	assertEquals(3,a.get(this));
55	<	assertEquals(3,a.getAndAdd(this,-4));
56	<	assertEquals(-1,a.get(this));
57	<	}
58	<
59	<	public void testGetAndDecrement(){
60	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
61	<	x = 1;
62	<	assertEquals(1,a.getAndDecrement(this));
63	<	assertEquals(0,a.getAndDecrement(this));
64	<	assertEquals(-1,a.getAndDecrement(this));
65	<	}
66	<
67	<	public void testGetAndIncrement(){
68	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
69	<	x = 1;
70	<	assertEquals(1,a.getAndIncrement(this));
71	<	assertEquals(2,a.get(this));
72	<	a.set(this,-2);
73	<	assertEquals(-2,a.getAndIncrement(this));
74	<	assertEquals(-1,a.getAndIncrement(this));
75	<	assertEquals(0,a.getAndIncrement(this));
76	<	assertEquals(1,a.get(this));
77	<	}
78	<
79	<	public void testAddAndGet(){
80	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
81	<	x = 1;
82	<	assertEquals(3,a.addAndGet(this,2));
83	<	assertEquals(3,a.get(this));
84	<	assertEquals(-1,a.addAndGet(this,-4));
85	<	assertEquals(-1,a.get(this));
86	<	}
87	<
88	<	public void testDecrementAndGet(){
89	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
90	<	x = 1;
91	<	assertEquals(0,a.decrementAndGet(this));
92	<	assertEquals(-1,a.decrementAndGet(this));
93	<	assertEquals(-2,a.decrementAndGet(this));
94	<	assertEquals(-2,a.get(this));
95	<	}
96	<
97	<	public void testIncrementAndGet(){
98	<	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a = AtomicIntegerFieldUpdater.newUpdater(getClass(), "x");
99	<	x = 1;
100	<	assertEquals(2,a.incrementAndGet(this));
101	<	assertEquals(2,a.get(this));
102	<	a.set(this,-2);
103	<	assertEquals(-1,a.incrementAndGet(this));
104	<	assertEquals(0,a.incrementAndGet(this));
105	<	assertEquals(1,a.incrementAndGet(this));
106	<	assertEquals(1,a.get(this));
42	>	/**
43	>	* construction with field not of given type throws IllegalArgumentException
44	>	*/
45	>	public void testConstructor2() {
46	>	try {
47	>	updaterFor("z");
48	>	shouldThrow();
49	>	} catch (IllegalArgumentException success) {}
50	>	}
51	>
52	>	/**
53	>	* construction with non-volatile field throws IllegalArgumentException
54	>	*/
55	>	public void testConstructor3() {
56	>	try {
57	>	updaterFor("w");
58	>	shouldThrow();
59	>	} catch (IllegalArgumentException success) {}
60	>	}
61	>
62	>	/**
63	>	* get returns the last value set or assigned
64	>	*/
65	>	public void testGetSet() {
66	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
67	>	a = updaterFor("x");
68	>	x = 1;
69	>	assertEquals(1, a.get(this));
70	>	a.set(this, 2);
71	>	assertEquals(2, a.get(this));
72	>	a.set(this, -3);
73	>	assertEquals(-3, a.get(this));
74	>	}
75	>
76	>	/**
77	>	* get returns the last value lazySet by same thread
78	>	*/
79	>	public void testGetLazySet() {
80	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
81	>	a = updaterFor("x");
82	>	x = 1;
83	>	assertEquals(1, a.get(this));
84	>	a.lazySet(this, 2);
85	>	assertEquals(2, a.get(this));
86	>	a.lazySet(this, -3);
87	>	assertEquals(-3, a.get(this));
88	>	}
89	>
90	>	/**
91	>	* compareAndSet succeeds in changing value if equal to expected else fails
92	>	*/
93	>	public void testCompareAndSet() {
94	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
95	>	a = updaterFor("x");
96	>	x = 1;
97	>	assertTrue(a.compareAndSet(this, 1, 2));
98	>	assertTrue(a.compareAndSet(this, 2, -4));
99	>	assertEquals(-4, a.get(this));
100	>	assertFalse(a.compareAndSet(this, -5, 7));
101	>	assertEquals(-4, a.get(this));
102	>	assertTrue(a.compareAndSet(this, -4, 7));
103	>	assertEquals(7, a.get(this));
104	>	}
105	>
106	>	/**
107	>	* compareAndSet in one thread enables another waiting for value
108	>	* to succeed
109	>	*/
110	>	public void testCompareAndSetInMultipleThreads() throws Exception {
111	>	x = 1;
112	>	final AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
113	>	a = updaterFor("x");
114	>
115	>	Thread t = new Thread(new CheckedRunnable() {
116	>	public void realRun() {
117	>	while (!a.compareAndSet(AtomicIntegerFieldUpdaterTest.this, 2, 3))
118	>	Thread.yield();
119	>	}});
120	>
121	>	t.start();
122	>	assertTrue(a.compareAndSet(this, 1, 2));
123	>	t.join(LONG_DELAY_MS);
124	>	assertFalse(t.isAlive());
125	>	assertEquals(3, a.get(this));
126	>	}
127	>
128	>	/**
129	>	* repeated weakCompareAndSet succeeds in changing value when equal
130	>	* to expected
131	>	*/
132	>	public void testWeakCompareAndSet() {
133	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
134	>	a = updaterFor("x");
135	>	x = 1;
136	>	do {} while (!a.weakCompareAndSet(this, 1, 2));
137	>	do {} while (!a.weakCompareAndSet(this, 2, -4));
138	>	assertEquals(-4, a.get(this));
139	>	do {} while (!a.weakCompareAndSet(this, -4, 7));
140	>	assertEquals(7, a.get(this));
141	>	}
142	>
143	>	/**
144	>	* getAndSet returns previous value and sets to given value
145	>	*/
146	>	public void testGetAndSet() {
147	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
148	>	a = updaterFor("x");
149	>	x = 1;
150	>	assertEquals(1, a.getAndSet(this, 0));
151	>	assertEquals(0, a.getAndSet(this, -10));
152	>	assertEquals(-10, a.getAndSet(this, 1));
153	>	}
154	>
155	>	/**
156	>	* getAndAdd returns previous value and adds given value
157	>	*/
158	>	public void testGetAndAdd() {
159	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
160	>	a = updaterFor("x");
161	>	x = 1;
162	>	assertEquals(1, a.getAndAdd(this, 2));
163	>	assertEquals(3, a.get(this));
164	>	assertEquals(3, a.getAndAdd(this, -4));
165	>	assertEquals(-1, a.get(this));
166	>	}
167	>
168	>	/**
169	>	* getAndDecrement returns previous value and decrements
170	>	*/
171	>	public void testGetAndDecrement() {
172	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
173	>	a = updaterFor("x");
174	>	x = 1;
175	>	assertEquals(1, a.getAndDecrement(this));
176	>	assertEquals(0, a.getAndDecrement(this));
177	>	assertEquals(-1, a.getAndDecrement(this));
178	>	}
179	>
180	>	/**
181	>	* getAndIncrement returns previous value and increments
182	>	*/
183	>	public void testGetAndIncrement() {
184	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
185	>	a = updaterFor("x");
186	>	x = 1;
187	>	assertEquals(1, a.getAndIncrement(this));
188	>	assertEquals(2, a.get(this));
189	>	a.set(this, -2);
190	>	assertEquals(-2, a.getAndIncrement(this));
191	>	assertEquals(-1, a.getAndIncrement(this));
192	>	assertEquals(0, a.getAndIncrement(this));
193	>	assertEquals(1, a.get(this));
194	>	}
195	>
196	>	/**
197	>	* addAndGet adds given value to current, and returns current value
198	>	*/
199	>	public void testAddAndGet() {
200	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
201	>	a = updaterFor("x");
202	>	x = 1;
203	>	assertEquals(3, a.addAndGet(this, 2));
204	>	assertEquals(3, a.get(this));
205	>	assertEquals(-1, a.addAndGet(this, -4));
206	>	assertEquals(-1, a.get(this));
207	>	}
208	>
209	>	/**
210	>	* decrementAndGet decrements and returns current value
211	>	*/
212	>	public void testDecrementAndGet() {
213	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
214	>	a = updaterFor("x");
215	>	x = 1;
216	>	assertEquals(0, a.decrementAndGet(this));
217	>	assertEquals(-1, a.decrementAndGet(this));
218	>	assertEquals(-2, a.decrementAndGet(this));
219	>	assertEquals(-2, a.get(this));
220	>	}
221	>
222	>	/**
223	>	* incrementAndGet increments and returns current value
224	>	*/
225	>	public void testIncrementAndGet() {
226	>	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
227	>	a = updaterFor("x");
228	>	x = 1;
229	>	assertEquals(2, a.incrementAndGet(this));
230	>	assertEquals(2, a.get(this));
231	>	a.set(this, -2);
232	>	assertEquals(-1, a.incrementAndGet(this));
233	>	assertEquals(0, a.incrementAndGet(this));
234	>	assertEquals(1, a.incrementAndGet(this));
235	>	assertEquals(1, a.get(this));
236		}
237
238		}

Diff Legend

–	Removed lines
+	Added lines
<	Changed lines
>	Changed lines