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

Comparing jsr166/src/test/tck/AtomicReferenceFieldUpdaterTest.java (file contents):
Revision 1.5 by dl, Sat Oct 25 16:02:13 2003 UTC vs.
Revision 1.36 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.AtomicReferenceFieldUpdater;
10
11	<	public class AtomicReferenceFieldUpdaterTest extends JSR166TestCase{
11	>	import junit.framework.Test;
12	>	import junit.framework.TestSuite;
13	>
14	>	public class AtomicReferenceFieldUpdaterTest extends JSR166TestCase {
15		volatile Integer x = null;
16	+	protected volatile Integer protectedField;
17	+	private volatile Integer privateField;
18		Object z;
19		Integer w;
20	+	volatile int i;
21
22	<	public static void main(String[] args){
23	<	junit.textui.TestRunner.run(suite());
22	>	public static void main(String[] args) {
23	>	main(suite(), args);
24		}
25		public static Test suite() {
26		return new TestSuite(AtomicReferenceFieldUpdaterTest.class);
27		}
28
29	+	static AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer> updaterFor(String fieldName) {
30	+	return AtomicReferenceFieldUpdater.newUpdater
31	+	(AtomicReferenceFieldUpdaterTest.class, Integer.class, fieldName);
32	+	}
33	+
34		/**
35	<	* Contruction with non-existent field throws RuntimeException
35	>	* Construction with non-existent field throws RuntimeException
36		*/
37	<	public void testConstructor(){
38	<	try{
39	<	AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>
30	<	a = AtomicReferenceFieldUpdater.newUpdater
31	<	(AtomicReferenceFieldUpdaterTest.class, Integer.class, "y");
37	>	public void testConstructor() {
38	>	try {
39	>	updaterFor("y");
40		shouldThrow();
41	+	} catch (RuntimeException success) {
42	+	assertNotNull(success.getCause());
43		}
34	–	catch (RuntimeException rt) {}
44		}
45
46	+	/**
47	+	* construction with field not of given type throws ClassCastException
48	+	*/
49	+	public void testConstructor2() {
50	+	try {
51	+	updaterFor("z");
52	+	shouldThrow();
53	+	} catch (ClassCastException success) {}
54	+	}
55
56		/**
57	<	* construction with field not of given type throws RuntimeException
57	>	* Constructor with non-volatile field throws IllegalArgumentException
58		*/
59	<	public void testConstructor2(){
60	<	try{
61	<	AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>
44	<	a = AtomicReferenceFieldUpdater.newUpdater
45	<	(AtomicReferenceFieldUpdaterTest.class, Integer.class, "z");
59	>	public void testConstructor3() {
60	>	try {
61	>	updaterFor("w");
62		shouldThrow();
63	<	}
48	<	catch (RuntimeException rt) {}
63	>	} catch (IllegalArgumentException success) {}
64		}
65
66		/**
67	<	* Constructor with non-volatile field throws exception
67	>	* Constructor with non-reference field throws ClassCastException
68		*/
69	<	public void testConstructor3(){
70	<	try{
71	<	AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>
57	<	a = AtomicReferenceFieldUpdater.newUpdater
58	<	(AtomicReferenceFieldUpdaterTest.class, Integer.class, "w");
69	>	public void testConstructor4() {
70	>	try {
71	>	updaterFor("i");
72		shouldThrow();
73	<	}
74	<	catch (RuntimeException rt) {}
73	>	} catch (ClassCastException success) {}
74	>	}
75	>
76	>	/**
77	>	* construction using private field from subclass throws RuntimeException
78	>	*/
79	>	public void testPrivateFieldInSubclass() {
80	>	new NonNestmates.AtomicReferenceFieldUpdaterTestSubclass()
81	>	.checkPrivateAccess();
82	>	}
83	>
84	>	/**
85	>	* construction from unrelated class; package access is allowed,
86	>	* private access is not
87	>	*/
88	>	public void testUnrelatedClassAccess() {
89	>	new NonNestmates().checkPackageAccess(this);
90	>	new NonNestmates().checkPrivateAccess(this);
91		}
92
93		/**
94	<	*  get returns the last value set or assigned
94	>	* get returns the last value set or assigned
95		*/
96	<	public void testGetSet(){
97	<	AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a = AtomicReferenceFieldUpdater.newUpdater(AtomicReferenceFieldUpdaterTest.class, Integer.class, "x");
96	>	public void testGetSet() {
97	>	AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer> a;
98	>	a = updaterFor("x");
99		x = one;
100	<	assertEquals(one,a.get(this));
101	<	a.set(this,two);
102	<	assertEquals(two,a.get(this));
103	<	a.set(this,-3);
104	<	assertEquals(-3,a.get(this));
75	<
100	>	assertSame(one, a.get(this));
101	>	a.set(this, two);
102	>	assertSame(two, a.get(this));
103	>	a.set(this, m3);
104	>	assertSame(m3, a.get(this));
105		}
106	+
107	+	/**
108	+	* get returns the last value lazySet by same thread
109	+	*/
110	+	public void testGetLazySet() {
111	+	AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer> a;
112	+	a = updaterFor("x");
113	+	x = one;
114	+	assertSame(one, a.get(this));
115	+	a.lazySet(this, two);
116	+	assertSame(two, a.get(this));
117	+	a.lazySet(this, m3);
118	+	assertSame(m3, a.get(this));
119	+	}
120	+
121		/**
122		* compareAndSet succeeds in changing value if equal to expected else fails
123		*/
124	<	public void testCompareAndSet(){
125	<	AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a = AtomicReferenceFieldUpdater.newUpdater(AtomicReferenceFieldUpdaterTest.class, Integer.class, "x");
124	>	public void testCompareAndSet() {
125	>	AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer> a;
126	>	a = updaterFor("x");
127		x = one;
128	<	assertTrue(a.compareAndSet(this,one,two));
129	<	assertTrue(a.compareAndSet(this,two,m4));
130	<	assertEquals(m4,a.get(this));
131	<	assertFalse(a.compareAndSet(this,m5,seven));
132	<	assertFalse((seven == a.get(this)));
133	<	assertTrue(a.compareAndSet(this,m4,seven));
134	<	assertEquals(seven,a.get(this));
128	>	assertTrue(a.compareAndSet(this, one, two));
129	>	assertTrue(a.compareAndSet(this, two, m4));
130	>	assertSame(m4, a.get(this));
131	>	assertFalse(a.compareAndSet(this, m5, seven));
132	>	assertNotSame(seven, a.get(this));
133	>	assertTrue(a.compareAndSet(this, m4, seven));
134	>	assertSame(seven, a.get(this));
135		}
136
137		/**
138		* compareAndSet in one thread enables another waiting for value
139		* to succeed
140		*/
141	<	public void testCompareAndSetInMultipleThreads() {
141	>	public void testCompareAndSetInMultipleThreads() throws Exception {
142		x = one;
143	<	final AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a = AtomicReferenceFieldUpdater.newUpdater(AtomicReferenceFieldUpdaterTest.class, Integer.class, "x");
143	>	final AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer> a;
144	>	a = updaterFor("x");
145
146	<	Thread t = new Thread(new Runnable() {
147	<	public void run() {
148	<	while(!a.compareAndSet(AtomicReferenceFieldUpdaterTest.this, two, three)) Thread.yield();
149	<	}});
150	<	try {
151	<	t.start();
152	<	assertTrue(a.compareAndSet(this, one, two));
153	<	t.join(LONG_DELAY_MS);
154	<	assertFalse(t.isAlive());
155	<	assertEquals(a.get(this), three);
156	<	}
111	<	catch(Exception e) {
112	<	unexpectedException();
113	<	}
146	>	Thread t = new Thread(new CheckedRunnable() {
147	>	public void realRun() {
148	>	while (!a.compareAndSet(AtomicReferenceFieldUpdaterTest.this, two, three))
149	>	Thread.yield();
150	>	}});
151	>
152	>	t.start();
153	>	assertTrue(a.compareAndSet(this, one, two));
154	>	t.join(LONG_DELAY_MS);
155	>	assertFalse(t.isAlive());
156	>	assertSame(three, a.get(this));
157		}
158
159		/**
160		* repeated weakCompareAndSet succeeds in changing value when equal
161	<	* to expected
161	>	* to expected
162		*/
163	<	public void testWeakCompareAndSet(){
164	<	AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a = AtomicReferenceFieldUpdater.newUpdater(AtomicReferenceFieldUpdaterTest.class, Integer.class, "x");
163	>	public void testWeakCompareAndSet() {
164	>	AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer> a;
165	>	a = updaterFor("x");
166		x = one;
167	<	while(!a.weakCompareAndSet(this,one,two));
168	<	while(!a.weakCompareAndSet(this,two,m4));
169	<	assertEquals(m4,a.get(this));
170	<	while(!a.weakCompareAndSet(this,m4,seven));
171	<	assertEquals(seven,a.get(this));
167	>	do {} while (!a.weakCompareAndSet(this, one, two));
168	>	do {} while (!a.weakCompareAndSet(this, two, m4));
169	>	assertSame(m4, a.get(this));
170	>	do {} while (!a.weakCompareAndSet(this, m4, seven));
171	>	assertSame(seven, a.get(this));
172		}
173
174		/**
175		* getAndSet returns previous value and sets to given value
176		*/
177	<	public void testGetAndSet(){
178	<	AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a = AtomicReferenceFieldUpdater.newUpdater(AtomicReferenceFieldUpdaterTest.class, Integer.class, "x");
177	>	public void testGetAndSet() {
178	>	AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer> a;
179	>	a = updaterFor("x");
180		x = one;
181	<	assertEquals(one,a.getAndSet(this, zero));
182	<	assertEquals(zero,a.getAndSet(this,m10));
183	<	assertEquals(m10,a.getAndSet(this,1));
181	>	assertSame(one, a.getAndSet(this, zero));
182	>	assertSame(zero, a.getAndSet(this, m10));
183	>	assertSame(m10, a.getAndSet(this, 1));
184		}
185
186		}

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