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

Comparing jsr166/src/test/tck/AtomicLongFieldUpdaterTest.java (file contents):
Revision 1.2 by dl, Sun Sep 14 20:42:40 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.AtomicLongFieldUpdater;
11
12		public class AtomicLongFieldUpdaterTest extends JSR166TestCase {
13		volatile long x = 0;
14	<	long z;
15	<	int w;
14	>	int z;
15	>	long w;
16
17	<	public static void main(String[] args){
17	>	public static void main(String[] args) {
18		junit.textui.TestRunner.run(suite());
19		}
20	–
21	–
20		public static Test suite() {
21		return new TestSuite(AtomicLongFieldUpdaterTest.class);
22		}
23
24	<	public void testConstructor(){
25	<	try{
26	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>
29	<	a = AtomicLongFieldUpdater.newUpdater
30	<	(getClass(), "y");
31	<	fail("Exception not thrown");
32	<	}
33	<
34	<	catch (RuntimeException rt) {}
24	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> updaterFor(String fieldName) {
25	>	return AtomicLongFieldUpdater.newUpdater
26	>	(AtomicLongFieldUpdaterTest.class, fieldName);
27		}
28
29	<	public void testConstructor2(){
30	<	try{
31	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>
32	<	a = AtomicLongFieldUpdater.newUpdater
33	<	(getClass(), "z");
34	<	fail("Exception not thrown");
29	>	/**
30	>	* Construction with non-existent field throws RuntimeException
31	>	*/
32	>	public void testConstructor() {
33	>	try {
34	>	updaterFor("y");
35	>	shouldThrow();
36	>	} catch (RuntimeException success) {
37	>	assertTrue(success.getCause() != null);
38		}
44	–
45	–	catch (RuntimeException rt) {}
46	–	}
47	–
48	–	public void testConstructor3(){
49	–	try{
50	–	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>
51	–	a = AtomicLongFieldUpdater.newUpdater
52	–	(getClass(), "w");
53	–	fail("Exception not thrown");
54	–	}
55	–
56	–	catch (RuntimeException rt) {}
57	–	}
58	–
59	–	public void testGetSet(){
60	–	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
61	–	x = 1;
62	–	assertEquals(1,a.get(this));
63	–	a.set(this,2);
64	–	assertEquals(2,a.get(this));
65	–	a.set(this,-3);
66	–	assertEquals(-3,a.get(this));
67	–
68	–	}
69	–	public void testCompareAndSet(){
70	–	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
71	–	x = 1;
72	–	assertTrue(a.compareAndSet(this,1,2));
73	–	assertTrue(a.compareAndSet(this,2,-4));
74	–	assertEquals(-4,a.get(this));
75	–	assertFalse(a.compareAndSet(this,-5,7));
76	–	assertFalse((7 == a.get(this)));
77	–	assertTrue(a.compareAndSet(this,-4,7));
78	–	assertEquals(7,a.get(this));
39		}
40
41	<	public void testWeakCompareAndSet(){
42	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
43	<	x = 1;
44	<	while(!a.weakCompareAndSet(this,1,2));
45	<	while(!a.weakCompareAndSet(this,2,-4));
46	<	assertEquals(-4,a.get(this));
47	<	while(!a.weakCompareAndSet(this,-4,7));
48	<	assertEquals(7,a.get(this));
49	<	}
50	<
51	<	public void testGetAndSet(){
52	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
53	<	x = 1;
54	<	assertEquals(1,a.getAndSet(this, 0));
55	<	assertEquals(0,a.getAndSet(this,-10));
56	<	assertEquals(-10,a.getAndSet(this,1));
57	<	}
58	<
59	<	public void testGetAndAdd(){
60	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
61	<	x = 1;
62	<	assertEquals(1,a.getAndAdd(this,2));
63	<	assertEquals(3,a.get(this));
64	<	assertEquals(3,a.getAndAdd(this,-4));
65	<	assertEquals(-1,a.get(this));
66	<	}
67	<
68	<	public void testGetAndDecrement(){
69	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
70	<	x = 1;
71	<	assertEquals(1,a.getAndDecrement(this));
72	<	assertEquals(0,a.getAndDecrement(this));
73	<	assertEquals(-1,a.getAndDecrement(this));
74	<	}
75	<
76	<	public void testGetAndIncrement(){
77	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
78	<	x = 1;
79	<	assertEquals(1,a.getAndIncrement(this));
80	<	assertEquals(2,a.get(this));
81	<	a.set(this,-2);
82	<	assertEquals(-2,a.getAndIncrement(this));
83	<	assertEquals(-1,a.getAndIncrement(this));
84	<	assertEquals(0,a.getAndIncrement(this));
85	<	assertEquals(1,a.get(this));
86	<	}
87	<
88	<	public void testAddAndGet(){
89	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
90	<	x = 1;
91	<	assertEquals(3,a.addAndGet(this,2));
92	<	assertEquals(3,a.get(this));
93	<	assertEquals(-1,a.addAndGet(this,-4));
94	<	assertEquals(-1,a.get(this));
95	<	}
96	<
97	<	public void testDecrementAndGet(){
98	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
99	<	x = 1;
100	<	assertEquals(0,a.decrementAndGet(this));
101	<	assertEquals(-1,a.decrementAndGet(this));
102	<	assertEquals(-2,a.decrementAndGet(this));
103	<	assertEquals(-2,a.get(this));
104	<	}
105	<
106	<	public void testIncrementAndGet(){
107	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
108	<	x = 1;
109	<	assertEquals(2,a.incrementAndGet(this));
110	<	assertEquals(2,a.get(this));
111	<	a.set(this,-2);
112	<	assertEquals(-1,a.incrementAndGet(this));
113	<	assertEquals(0,a.incrementAndGet(this));
114	<	assertEquals(1,a.incrementAndGet(this));
115	<	assertEquals(1,a.get(this));
41	>	/**
42	>	* construction with field not of given type throws IllegalArgumentException
43	>	*/
44	>	public void testConstructor2() {
45	>	try {
46	>	updaterFor("z");
47	>	shouldThrow();
48	>	} catch (IllegalArgumentException success) {}
49	>	}
50	>
51	>	/**
52	>	* construction with non-volatile field throws IllegalArgumentException
53	>	*/
54	>	public void testConstructor3() {
55	>	try {
56	>	updaterFor("w");
57	>	shouldThrow();
58	>	} catch (IllegalArgumentException success) {}
59	>	}
60	>
61	>	/**
62	>	* get returns the last value set or assigned
63	>	*/
64	>	public void testGetSet() {
65	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
66	>	a = updaterFor("x");
67	>	x = 1;
68	>	assertEquals(1, a.get(this));
69	>	a.set(this, 2);
70	>	assertEquals(2, a.get(this));
71	>	a.set(this, -3);
72	>	assertEquals(-3, a.get(this));
73	>	}
74	>
75	>	/**
76	>	* get returns the last value lazySet by same thread
77	>	*/
78	>	public void testGetLazySet() {
79	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
80	>	a = updaterFor("x");
81	>	x = 1;
82	>	assertEquals(1, a.get(this));
83	>	a.lazySet(this, 2);
84	>	assertEquals(2, a.get(this));
85	>	a.lazySet(this, -3);
86	>	assertEquals(-3, a.get(this));
87	>	}
88	>
89	>	/**
90	>	* compareAndSet succeeds in changing value if equal to expected else fails
91	>	*/
92	>	public void testCompareAndSet() {
93	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
94	>	a = updaterFor("x");
95	>	x = 1;
96	>	assertTrue(a.compareAndSet(this, 1, 2));
97	>	assertTrue(a.compareAndSet(this, 2, -4));
98	>	assertEquals(-4, a.get(this));
99	>	assertFalse(a.compareAndSet(this, -5, 7));
100	>	assertEquals(-4, a.get(this));
101	>	assertTrue(a.compareAndSet(this, -4, 7));
102	>	assertEquals(7, a.get(this));
103	>	}
104	>
105	>	/**
106	>	* compareAndSet in one thread enables another waiting for value
107	>	* to succeed
108	>	*/
109	>	public void testCompareAndSetInMultipleThreads() throws Exception {
110	>	x = 1;
111	>	final AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
112	>	a = updaterFor("x");
113	>
114	>	Thread t = new Thread(new CheckedRunnable() {
115	>	public void realRun() {
116	>	while (!a.compareAndSet(AtomicLongFieldUpdaterTest.this, 2, 3))
117	>	Thread.yield();
118	>	}});
119	>
120	>	t.start();
121	>	assertTrue(a.compareAndSet(this, 1, 2));
122	>	t.join(LONG_DELAY_MS);
123	>	assertFalse(t.isAlive());
124	>	assertEquals(3, a.get(this));
125	>	}
126	>
127	>	/**
128	>	* repeated weakCompareAndSet succeeds in changing value when equal
129	>	* to expected
130	>	*/
131	>	public void testWeakCompareAndSet() {
132	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
133	>	a = updaterFor("x");
134	>	x = 1;
135	>	while (!a.weakCompareAndSet(this, 1, 2));
136	>	while (!a.weakCompareAndSet(this, 2, -4));
137	>	assertEquals(-4, a.get(this));
138	>	while (!a.weakCompareAndSet(this, -4, 7));
139	>	assertEquals(7, a.get(this));
140	>	}
141	>
142	>	/**
143	>	* getAndSet returns previous value and sets to given value
144	>	*/
145	>	public void testGetAndSet() {
146	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
147	>	a = updaterFor("x");
148	>	x = 1;
149	>	assertEquals(1, a.getAndSet(this, 0));
150	>	assertEquals(0, a.getAndSet(this, -10));
151	>	assertEquals(-10, a.getAndSet(this, 1));
152	>	}
153	>
154	>	/**
155	>	* getAndAdd returns previous value and adds given value
156	>	*/
157	>	public void testGetAndAdd() {
158	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
159	>	a = updaterFor("x");
160	>	x = 1;
161	>	assertEquals(1, a.getAndAdd(this, 2));
162	>	assertEquals(3, a.get(this));
163	>	assertEquals(3, a.getAndAdd(this, -4));
164	>	assertEquals(-1, a.get(this));
165	>	}
166	>
167	>	/**
168	>	* getAndDecrement returns previous value and decrements
169	>	*/
170	>	public void testGetAndDecrement() {
171	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
172	>	a = updaterFor("x");
173	>	x = 1;
174	>	assertEquals(1, a.getAndDecrement(this));
175	>	assertEquals(0, a.getAndDecrement(this));
176	>	assertEquals(-1, a.getAndDecrement(this));
177	>	}
178	>
179	>	/**
180	>	* getAndIncrement returns previous value and increments
181	>	*/
182	>	public void testGetAndIncrement() {
183	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
184	>	a = updaterFor("x");
185	>	x = 1;
186	>	assertEquals(1, a.getAndIncrement(this));
187	>	assertEquals(2, a.get(this));
188	>	a.set(this, -2);
189	>	assertEquals(-2, a.getAndIncrement(this));
190	>	assertEquals(-1, a.getAndIncrement(this));
191	>	assertEquals(0, a.getAndIncrement(this));
192	>	assertEquals(1, a.get(this));
193	>	}
194	>
195	>	/**
196	>	* addAndGet adds given value to current, and returns current value
197	>	*/
198	>	public void testAddAndGet() {
199	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
200	>	a = updaterFor("x");
201	>	x = 1;
202	>	assertEquals(3, a.addAndGet(this, 2));
203	>	assertEquals(3, a.get(this));
204	>	assertEquals(-1, a.addAndGet(this, -4));
205	>	assertEquals(-1, a.get(this));
206	>	}
207	>
208	>	/**
209	>	* decrementAndGet decrements and returns current value
210	>	*/
211	>	public void testDecrementAndGet() {
212	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
213	>	a = updaterFor("x");
214	>	x = 1;
215	>	assertEquals(0, a.decrementAndGet(this));
216	>	assertEquals(-1, a.decrementAndGet(this));
217	>	assertEquals(-2, a.decrementAndGet(this));
218	>	assertEquals(-2, a.get(this));
219	>	}
220	>
221	>	/**
222	>	* incrementAndGet increments and returns current value
223	>	*/
224	>	public void testIncrementAndGet() {
225	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
226	>	a = updaterFor("x");
227	>	x = 1;
228	>	assertEquals(2, a.incrementAndGet(this));
229	>	assertEquals(2, a.get(this));
230	>	a.set(this, -2);
231	>	assertEquals(-1, a.incrementAndGet(this));
232	>	assertEquals(0, a.incrementAndGet(this));
233	>	assertEquals(1, a.incrementAndGet(this));
234	>	assertEquals(1, a.get(this));
235		}
236
237		}

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