test/tck/AtomicReferenceFieldUpdaterTest.java

/*
 * Written by Doug Lea with assistance from members of JCP JSR-166
 * Expert Group and released to the public domain, as explained at
 * http://creativecommons.org/publicdomain/zero/1.0/
 * Other contributors include Andrew Wright, Jeffrey Hayes,
 * Pat Fisher, Mike Judd.
 */

import java.util.concurrent.atomic.AtomicReferenceFieldUpdater;

import junit.framework.Test;
import junit.framework.TestSuite;

public class AtomicReferenceFieldUpdaterTest extends JSR166TestCase {
    volatile Integer x = null;
    protected volatile Integer protectedField;
    private volatile Integer privateField;
    Object z;
    Integer w;
    volatile int i;

    public static void main(String[] args) {
        main(suite(), args);
    }
    public static Test suite() {
        return new TestSuite(AtomicReferenceFieldUpdaterTest.class);
    }

    static AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer> updaterFor(String fieldName) {
        return AtomicReferenceFieldUpdater.newUpdater
            (AtomicReferenceFieldUpdaterTest.class, Integer.class, fieldName);
    }

    /**
     * Construction with non-existent field throws RuntimeException
     */
    public void testConstructor() {
        try {
            updaterFor("y");
            shouldThrow();
        } catch (RuntimeException success) {
            assertNotNull(success.getCause());
        }
    }

    /**
     * construction with field not of given type throws ClassCastException
     */
    public void testConstructor2() {
        try {
            updaterFor("z");
            shouldThrow();
        } catch (ClassCastException success) {}
    }

    /**
     * Constructor with non-volatile field throws IllegalArgumentException
     */
    public void testConstructor3() {
        try {
            updaterFor("w");
            shouldThrow();
        } catch (IllegalArgumentException success) {}
    }

    /**
     * Constructor with non-reference field throws ClassCastException
     */
    public void testConstructor4() {
        try {
            updaterFor("i");
            shouldThrow();
        } catch (ClassCastException success) {}
    }

    /**
     * construction using private field from subclass throws RuntimeException
     */
    public void testPrivateFieldInSubclass() {
        new NonNestmates.AtomicReferenceFieldUpdaterTestSubclass()
            .checkPrivateAccess();
    }

    /**
     * construction from unrelated class; package access is allowed,
     * private access is not
     */
    public void testUnrelatedClassAccess() {
        new NonNestmates().checkPackageAccess(this);
        new NonNestmates().checkPrivateAccess(this);
    }

    /**
     * get returns the last value set or assigned
     */
    public void testGetSet() {
        AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer> a;
        a = updaterFor("x");
        x = one;
        assertSame(one, a.get(this));
        a.set(this, two);
        assertSame(two, a.get(this));
        a.set(this, m3);
        assertSame(m3, a.get(this));
    }

    /**
     * get returns the last value lazySet by same thread
     */
    public void testGetLazySet() {
        AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer> a;
        a = updaterFor("x");
        x = one;
        assertSame(one, a.get(this));
        a.lazySet(this, two);
        assertSame(two, a.get(this));
        a.lazySet(this, m3);
        assertSame(m3, a.get(this));
    }

    /**
     * compareAndSet succeeds in changing value if equal to expected else fails
     */
    public void testCompareAndSet() {
        AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer> a;
        a = updaterFor("x");
        x = one;
        assertTrue(a.compareAndSet(this, one, two));
        assertTrue(a.compareAndSet(this, two, m4));
        assertSame(m4, a.get(this));
        assertFalse(a.compareAndSet(this, m5, seven));
        assertNotSame(seven, a.get(this));
        assertTrue(a.compareAndSet(this, m4, seven));
        assertSame(seven, a.get(this));
    }

    /**
     * compareAndSet in one thread enables another waiting for value
     * to succeed
     */
    public void testCompareAndSetInMultipleThreads() throws Exception {
        x = one;
        final AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer> a;
        a = updaterFor("x");

        Thread t = new Thread(new CheckedRunnable() {
            public void realRun() {
                while (!a.compareAndSet(AtomicReferenceFieldUpdaterTest.this, two, three))
                    Thread.yield();
            }});

        t.start();
        assertTrue(a.compareAndSet(this, one, two));
        t.join(LONG_DELAY_MS);
        assertFalse(t.isAlive());
        assertSame(three, a.get(this));
    }

    /**
     * repeated weakCompareAndSet succeeds in changing value when equal
     * to expected
     */
    public void testWeakCompareAndSet() {
        AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer> a;
        a = updaterFor("x");
        x = one;
        do {} while (!a.weakCompareAndSet(this, one, two));
        do {} while (!a.weakCompareAndSet(this, two, m4));
        assertSame(m4, a.get(this));
        do {} while (!a.weakCompareAndSet(this, m4, seven));
        assertSame(seven, a.get(this));
    }

    /**
     * getAndSet returns previous value and sets to given value
     */
    public void testGetAndSet() {
        AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer> a;
        a = updaterFor("x");
        x = one;
        assertSame(one, a.getAndSet(this, zero));
        assertSame(zero, a.getAndSet(this, m10));
        assertSame(m10, a.getAndSet(this, 1));
    }

}
Revision:	1.36
Committed:	Wed Sep 20 00:41:13 2017 UTC (6 years, 7 months ago) by jsr166
Branch:	MAIN
Changes since 1.35:	+4 -56 lines
Log Message:	8187607: [Testbug] Atomic*FieldUpdaterTest.checkPrivateAccess uses nested classes
#	User	Rev	Content
1	dl	1.1	/*
2	dl	1.6	* 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	jsr166	1.21	* http://creativecommons.org/publicdomain/zero/1.0/
5	jsr166	1.11	* Other contributors include Andrew Wright, Jeffrey Hayes,
6			* Pat Fisher, Mike Judd.
7	dl	1.1	*/
8
9	jsr166	1.23	import java.util.concurrent.atomic.AtomicReferenceFieldUpdater;
10	dl	1.1
11	jsr166	1.30	import junit.framework.Test;
12			import junit.framework.TestSuite;
13
14	jsr166	1.13	public class AtomicReferenceFieldUpdaterTest extends JSR166TestCase {
15	dl	1.1	volatile Integer x = null;
16	jsr166	1.34	protected volatile Integer protectedField;
17			private volatile Integer privateField;
18	dl	1.1	Object z;
19			Integer w;
20	jsr166	1.28	volatile int i;
21	dl	1.1
22	jsr166	1.13	public static void main(String[] args) {
23	jsr166	1.33	main(suite(), args);
24	dl	1.1	}
25			public static Test suite() {
26			return new TestSuite(AtomicReferenceFieldUpdaterTest.class);
27			}
28
29	jsr166	1.34	static AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer> updaterFor(String fieldName) {
30	jsr166	1.26	return AtomicReferenceFieldUpdater.newUpdater
31			(AtomicReferenceFieldUpdaterTest.class, Integer.class, fieldName);
32			}
33
34	dl	1.3	/**
35	dl	1.7	* Construction with non-existent field throws RuntimeException
36	dl	1.3	*/
37	jsr166	1.13	public void testConstructor() {
38	jsr166	1.12	try {
39	jsr166	1.26	updaterFor("y");
40	dl	1.3	shouldThrow();
41	jsr166	1.27	} catch (RuntimeException success) {
42	jsr166	1.29	assertNotNull(success.getCause());
43	jsr166	1.27	}
44	dl	1.1	}
45
46	dl	1.3	/**
47	jsr166	1.28	* construction with field not of given type throws ClassCastException
48	dl	1.3	*/
49	jsr166	1.13	public void testConstructor2() {
50	jsr166	1.12	try {
51	jsr166	1.26	updaterFor("z");
52	dl	1.3	shouldThrow();
53	jsr166	1.28	} catch (ClassCastException success) {}
54	dl	1.1	}
55
56	dl	1.3	/**
57	jsr166	1.27	* Constructor with non-volatile field throws IllegalArgumentException
58	dl	1.3	*/
59	jsr166	1.13	public void testConstructor3() {
60	jsr166	1.12	try {
61	jsr166	1.26	updaterFor("w");
62	dl	1.3	shouldThrow();
63	jsr166	1.27	} catch (IllegalArgumentException success) {}
64	dl	1.1	}
65
66	dl	1.3	/**
67	jsr166	1.28	* Constructor with non-reference field throws ClassCastException
68			*/
69			public void testConstructor4() {
70			try {
71			updaterFor("i");
72			shouldThrow();
73			} catch (ClassCastException success) {}
74			}
75
76			/**
77	jsr166	1.34	* construction using private field from subclass throws RuntimeException
78			*/
79			public void testPrivateFieldInSubclass() {
80	jsr166	1.36	new NonNestmates.AtomicReferenceFieldUpdaterTestSubclass()
81			.checkPrivateAccess();
82	jsr166	1.34	}
83
84			/**
85			* construction from unrelated class; package access is allowed,
86			* private access is not
87			*/
88			public void testUnrelatedClassAccess() {
89	jsr166	1.36	new NonNestmates().checkPackageAccess(this);
90			new NonNestmates().checkPrivateAccess(this);
91	jsr166	1.34	}
92
93			/**
94	jsr166	1.20	* get returns the last value set or assigned
95	dl	1.3	*/
96	jsr166	1.13	public void testGetSet() {
97	jsr166	1.32	AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer> a;
98	jsr166	1.26	a = updaterFor("x");
99	dl	1.1	x = one;
100	jsr166	1.24	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	dl	1.1	}
106	dl	1.10
107			/**
108	jsr166	1.20	* get returns the last value lazySet by same thread
109	dl	1.10	*/
110	jsr166	1.13	public void testGetLazySet() {
111	jsr166	1.32	AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer> a;
112	jsr166	1.26	a = updaterFor("x");
113	dl	1.10	x = one;
114	jsr166	1.24	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	dl	1.10	}
120
121	dl	1.3	/**
122	dl	1.4	* compareAndSet succeeds in changing value if equal to expected else fails
123	dl	1.3	*/
124	jsr166	1.13	public void testCompareAndSet() {
125	jsr166	1.32	AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer> a;
126	jsr166	1.26	a = updaterFor("x");
127	dl	1.1	x = one;
128	jsr166	1.19	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	jsr166	1.35	assertNotSame(seven, a.get(this));
133	jsr166	1.19	assertTrue(a.compareAndSet(this, m4, seven));
134	jsr166	1.24	assertSame(seven, a.get(this));
135	dl	1.1	}
136
137	dl	1.3	/**
138	dl	1.4	* compareAndSet in one thread enables another waiting for value
139			* to succeed
140			*/
141	jsr166	1.14	public void testCompareAndSetInMultipleThreads() throws Exception {
142	dl	1.4	x = one;
143	jsr166	1.32	final AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer> a;
144	jsr166	1.26	a = updaterFor("x");
145	dl	1.4
146	jsr166	1.15	Thread t = new Thread(new CheckedRunnable() {
147			public void realRun() {
148			while (!a.compareAndSet(AtomicReferenceFieldUpdaterTest.this, two, three))
149			Thread.yield();
150			}});
151	jsr166	1.14
152			t.start();
153			assertTrue(a.compareAndSet(this, one, two));
154			t.join(LONG_DELAY_MS);
155			assertFalse(t.isAlive());
156	jsr166	1.25	assertSame(three, a.get(this));
157	dl	1.4	}
158
159			/**
160			* repeated weakCompareAndSet succeeds in changing value when equal
161	jsr166	1.11	* to expected
162	dl	1.3	*/
163	jsr166	1.13	public void testWeakCompareAndSet() {
164	jsr166	1.32	AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer> a;
165	jsr166	1.26	a = updaterFor("x");
166	dl	1.1	x = one;
167	jsr166	1.31	do {} while (!a.weakCompareAndSet(this, one, two));
168			do {} while (!a.weakCompareAndSet(this, two, m4));
169	jsr166	1.24	assertSame(m4, a.get(this));
170	jsr166	1.31	do {} while (!a.weakCompareAndSet(this, m4, seven));
171	jsr166	1.24	assertSame(seven, a.get(this));
172	dl	1.1	}
173
174	dl	1.3	/**
175	dl	1.4	* getAndSet returns previous value and sets to given value
176	dl	1.3	*/
177	jsr166	1.13	public void testGetAndSet() {
178	jsr166	1.32	AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer> a;
179	jsr166	1.26	a = updaterFor("x");
180	dl	1.1	x = one;
181	jsr166	1.24	assertSame(one, a.getAndSet(this, zero));
182			assertSame(zero, a.getAndSet(this, m10));
183			assertSame(m10, a.getAndSet(this, 1));
184	dl	1.1	}
185
186			}