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

Comparing jsr166/src/test/tck/AtomicReferenceFieldUpdaterTest.java (file contents):
Revision 1.18 by jsr166, Tue Dec 1 09:56:28 2009 UTC vs.
Revision 1.38 by dl, Tue Jan 26 13:33:05 2021 UTC

#	Line 1 | Line 1
1		/*
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/licenses/publicdomain
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.AtomicReferenceFieldUpdater;
10	>
11	>	import junit.framework.Test;
12	>	import junit.framework.TestSuite;
13
14		public class AtomicReferenceFieldUpdaterTest extends JSR166TestCase {
15	<	volatile Integer x = null;
15	>	volatile Item x = null;
16	>	protected volatile Item protectedField;
17	>	private volatile Item privateField;
18		Object z;
19	<	Integer w;
19	>	Item w;
20	>	volatile int i;
21
22		public static void main(String[] args) {
23	<	junit.textui.TestRunner.run(suite());
23	>	main(suite(), args);
24		}
25		public static Test suite() {
26		return new TestSuite(AtomicReferenceFieldUpdaterTest.class);
27		}
28
29	+	static AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Item> updaterFor(String fieldName) {
30	+	return AtomicReferenceFieldUpdater.newUpdater
31	+	(AtomicReferenceFieldUpdaterTest.class, Item.class, fieldName);
32	+	}
33	+
34		/**
35		* Construction with non-existent field throws RuntimeException
36		*/
37		public void testConstructor() {
38		try {
39	<	AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>
31	<	a = AtomicReferenceFieldUpdater.newUpdater
32	<	(AtomicReferenceFieldUpdaterTest.class, Integer.class, "y");
39	>	updaterFor("y");
40		shouldThrow();
41	<	} catch (RuntimeException success) {}
41	>	} catch (RuntimeException success) {
42	>	assertNotNull(success.getCause());
43	>	}
44		}
45
37	–
46		/**
47	<	* construction with field not of given type throws RuntimeException
47	>	* construction with field not of given type throws ClassCastException
48		*/
49		public void testConstructor2() {
50		try {
51	<	AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>
44	<	a = AtomicReferenceFieldUpdater.newUpdater
45	<	(AtomicReferenceFieldUpdaterTest.class, Integer.class, "z");
51	>	updaterFor("z");
52		shouldThrow();
53	<	} catch (RuntimeException success) {}
53	>	} catch (ClassCastException success) {}
54		}
55
56		/**
57	<	* Constructor with non-volatile field throws exception
57	>	* Constructor with non-volatile field throws IllegalArgumentException
58		*/
59		public void testConstructor3() {
60		try {
61	<	AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>
56	<	a = AtomicReferenceFieldUpdater.newUpdater
57	<	(AtomicReferenceFieldUpdaterTest.class, Integer.class, "w");
61	>	updaterFor("w");
62		shouldThrow();
63	<	} catch (RuntimeException success) {}
63	>	} catch (IllegalArgumentException success) {}
64		}
65
66		/**
67	<	*  get returns the last value set or assigned
67	>	* Constructor with non-reference field throws ClassCastException
68		*/
69	<	public void testGetSet() {
66	<	AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a;
69	>	public void testConstructor4() {
70		try {
71	<	a = AtomicReferenceFieldUpdater.newUpdater(AtomicReferenceFieldUpdaterTest.class, Integer.class, "x");
72	<	} catch (RuntimeException ok) {
73	<	return;
74	<	}
71	>	updaterFor("i");
72	>	shouldThrow();
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
95	>	*/
96	>	public void testGetSet() {
97	>	AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Item> a;
98	>	a = updaterFor("x");
99		x = one;
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));
100	>	assertSame(one, a.get(this));
101	>	a.set(this, two);
102	>	assertSame(two, a.get(this));
103	>	a.set(this, minusThree);
104	>	assertSame(minusThree, a.get(this));
105		}
106
107		/**
108	<	*  get returns the last value lazySet by same thread
108	>	* get returns the last value lazySet by same thread
109		*/
110		public void testGetLazySet() {
111	<	AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a;
112	<	try {
86	<	a = AtomicReferenceFieldUpdater.newUpdater(AtomicReferenceFieldUpdaterTest.class, Integer.class, "x");
87	<	} catch (RuntimeException ok) {
88	<	return;
89	<	}
111	>	AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Item> 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));
114	>	assertSame(one, a.get(this));
115	>	a.lazySet(this, two);
116	>	assertSame(two, a.get(this));
117	>	a.lazySet(this, minusThree);
118	>	assertSame(minusThree, a.get(this));
119		}
120
121		/**
122	<	* compareAndSet succeeds in changing value if equal to expected else fails
122	>	* compareAndSet succeeds in changing value if same as expected else fails
123		*/
124		public void testCompareAndSet() {
125	<	AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a;
126	<	try {
104	<	a = AtomicReferenceFieldUpdater.newUpdater(AtomicReferenceFieldUpdaterTest.class, Integer.class, "x");
105	<	} catch (RuntimeException ok) {
106	<	return;
107	<	}
125	>	AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Item> a;
126	>	a = updaterFor("x");
127		x = one;
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	<	assertFalse(seven == a.get(this));
133	<	assertTrue(a.compareAndSet(this,m4,seven));
134	<	assertSame(seven,a.get(this));
128	>	assertTrue(a.compareAndSet(this, one, two));
129	>	assertTrue(a.compareAndSet(this, two, minusFour));
130	>	assertSame(minusFour, a.get(this));
131	>	assertFalse(a.compareAndSet(this, minusFive, seven));
132	>	assertNotSame(seven, a.get(this));
133	>	assertTrue(a.compareAndSet(this, minusFour, seven));
134	>	assertSame(seven, a.get(this));
135	>	}
136	>
137	>	/**
138	>	* compareAndSet succeeds in changing protected field value if
139	>	* same as expected else fails
140	>	*/
141	>	public void testCompareAndSetProtectedInSubclass() {
142	>	new NonNestmates.AtomicReferenceFieldUpdaterTestSubclass()
143	>	.checkCompareAndSetProtectedSub();
144		}
145
146		/**
#	Line 121 | Line 149 | public class AtomicReferenceFieldUpdater
149		*/
150		public void testCompareAndSetInMultipleThreads() throws Exception {
151		x = one;
152	<	final AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a;
153	<	try {
126	<	a = AtomicReferenceFieldUpdater.newUpdater(AtomicReferenceFieldUpdaterTest.class, Integer.class, "x");
127	<	} catch (RuntimeException ok) {
128	<	return;
129	<	}
152	>	final AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Item> a;
153	>	a = updaterFor("x");
154
155		Thread t = new Thread(new CheckedRunnable() {
156		public void realRun() {
#	Line 138 | Line 162 | public class AtomicReferenceFieldUpdater
162		assertTrue(a.compareAndSet(this, one, two));
163		t.join(LONG_DELAY_MS);
164		assertFalse(t.isAlive());
165	<	assertSame(a.get(this), three);
165	>	assertSame(three, a.get(this));
166		}
167
168		/**
169	<	* repeated weakCompareAndSet succeeds in changing value when equal
146	<	* to expected
169	>	* repeated weakCompareAndSet succeeds in changing value when same as expected
170		*/
171		public void testWeakCompareAndSet() {
172	<	AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a;
173	<	try {
151	<	a = AtomicReferenceFieldUpdater.newUpdater(AtomicReferenceFieldUpdaterTest.class, Integer.class, "x");
152	<	} catch (RuntimeException ok) {
153	<	return;
154	<	}
172	>	AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Item> a;
173	>	a = updaterFor("x");
174		x = one;
175	<	while (!a.weakCompareAndSet(this,one,two));
176	<	while (!a.weakCompareAndSet(this,two,m4));
177	<	assertSame(m4,a.get(this));
178	<	while (!a.weakCompareAndSet(this,m4,seven));
179	<	assertSame(seven,a.get(this));
175	>	do {} while (!a.weakCompareAndSet(this, one, two));
176	>	do {} while (!a.weakCompareAndSet(this, two, minusFour));
177	>	assertSame(minusFour, a.get(this));
178	>	do {} while (!a.weakCompareAndSet(this, minusFour, seven));
179	>	assertSame(seven, a.get(this));
180		}
181
182		/**
183		* getAndSet returns previous value and sets to given value
184		*/
185		public void testGetAndSet() {
186	<	AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a;
187	<	try {
169	<	a = AtomicReferenceFieldUpdater.newUpdater(AtomicReferenceFieldUpdaterTest.class, Integer.class, "x");
170	<	} catch (RuntimeException ok) {
171	<	return;
172	<	}
186	>	AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Item> a;
187	>	a = updaterFor("x");
188		x = one;
189	<	assertSame(one,a.getAndSet(this, zero));
190	<	assertSame(zero,a.getAndSet(this,m10));
191	<	assertSame(m10,a.getAndSet(this,1));
189	>	assertSame(one, a.getAndSet(this, zero));
190	>	assertSame(zero, a.getAndSet(this, minusTen));
191	>	assertSame(minusTen, a.getAndSet(this, one));
192		}
193
194		}

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