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

Comparing jsr166/src/test/tck/AtomicLongFieldUpdaterTest.java (file contents):
Revision 1.4 by dl, Thu Sep 25 11:02:41 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		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		public static Test suite() {
21		return new TestSuite(AtomicLongFieldUpdaterTest.class);
22		}
23
24	+	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> updaterFor(String fieldName) {
25	+	return AtomicLongFieldUpdater.newUpdater
26	+	(AtomicLongFieldUpdaterTest.class, fieldName);
27	+	}
28	+
29		/**
30	<	* Contruction with non-existent field throws RuntimeException
30	>	* Construction with non-existent field throws RuntimeException
31		*/
32	<	public void testConstructor(){
33	<	try{
34	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>
30	<	a = AtomicLongFieldUpdater.newUpdater
31	<	(getClass(), "y");
32	>	public void testConstructor() {
33	>	try {
34	>	updaterFor("y");
35		shouldThrow();
36	+	} catch (RuntimeException success) {
37	+	assertTrue(success.getCause() != null);
38		}
34	–	catch (RuntimeException rt) {}
39		}
40
41		/**
42	<	* construction with field not of given type throws RuntimeException
42	>	* construction with field not of given type throws IllegalArgumentException
43		*/
44	<	public void testConstructor2(){
45	<	try{
46	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>
43	<	a = AtomicLongFieldUpdater.newUpdater
44	<	(getClass(), "z");
44	>	public void testConstructor2() {
45	>	try {
46	>	updaterFor("z");
47		shouldThrow();
48	<	}
47	<	catch (RuntimeException rt) {}
48	>	} catch (IllegalArgumentException success) {}
49		}
50
51		/**
52	<	* construction with non-volatile field throws RuntimeException
52	>	* construction with non-volatile field throws IllegalArgumentException
53		*/
54	<	public void testConstructor3(){
55	<	try{
56	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>
56	<	a = AtomicLongFieldUpdater.newUpdater
57	<	(getClass(), "w");
54	>	public void testConstructor3() {
55	>	try {
56	>	updaterFor("w");
57		shouldThrow();
58	<	}
60	<
61	<	catch (RuntimeException rt) {}
58	>	} catch (IllegalArgumentException success) {}
59		}
60
61		/**
62	<	*  get returns the last value set or assigned
62	>	* get returns the last value set or assigned
63		*/
64	<	public void testGetSet(){
65	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
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));
75	<
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	<	* compareAndSet succeeds in changing value if equal to expected else fails
76	>	* get returns the last value lazySet by same thread
77		*/
78	<	public void testCompareAndSet(){
79	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
78	>	public void testGetLazySet() {
79	>	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
80	>	a = updaterFor("x");
81		x = 1;
82	<	assertTrue(a.compareAndSet(this,1,2));
83	<	assertTrue(a.compareAndSet(this,2,-4));
84	<	assertEquals(-4,a.get(this));
85	<	assertFalse(a.compareAndSet(this,-5,7));
86	<	assertFalse((7 == a.get(this)));
88	<	assertTrue(a.compareAndSet(this,-4,7));
89	<	assertEquals(7,a.get(this));
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() {
109	>	public void testCompareAndSetInMultipleThreads() throws Exception {
110		x = 1;
111	<	final AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest>a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
111	>	final AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
112	>	a = updaterFor("x");
113
114	<	Thread t = new Thread(new Runnable() {
115	<	public void run() {
116	<	while(!a.compareAndSet(AtomicLongFieldUpdaterTest.this, 2, 3)) Thread.yield();
117	<	}});
118	<	try {
119	<	t.start();
120	<	assertTrue(a.compareAndSet(this, 1, 2));
121	<	t.join(LONG_DELAY_MS);
122	<	assertFalse(t.isAlive());
123	<	assertEquals(a.get(this), 3);
124	<	}
112	<	catch(Exception e) {
113	<	unexpectedException();
114	<	}
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
129	>	* to expected
130		*/
131	<	public void testWeakCompareAndSet(){
132	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
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));
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
143	>	* getAndSet returns previous value and sets to given value
144		*/
145	<	public void testGetAndSet(){
146	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
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));
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 = AtomicLongFieldUpdater.newUpdater(getClass(), "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));
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 = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
172	<	x = 1;
173	<	assertEquals(1,a.getAndDecrement(this));
174	<	assertEquals(0,a.getAndDecrement(this));
175	<	assertEquals(-1,a.getAndDecrement(this));
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 = AtomicLongFieldUpdater.newUpdater(getClass(), "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));
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 = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
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));
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
209	>	* decrementAndGet decrements and returns current value
210		*/
211	<	public void testDecrementAndGet(){
212	<	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a = AtomicLongFieldUpdater.newUpdater(getClass(), "x");
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));
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 = AtomicLongFieldUpdater.newUpdater(getClass(), "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));
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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