test/tck/AtomicLongFieldUpdaterTest.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.AtomicLongFieldUpdater;

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

public class AtomicLongFieldUpdaterTest extends JSR166TestCase {
    volatile long x = 0;
    protected volatile long protectedField;
    private volatile long privateField;
    long w;
    float z;
    public static void main(String[] args) {
        main(suite(), args);
    }
    public static Test suite() {
        return new TestSuite(AtomicLongFieldUpdaterTest.class);
    }

    AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> updaterFor(String fieldName) {
        return AtomicLongFieldUpdater.newUpdater
            (AtomicLongFieldUpdaterTest.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 IllegalArgumentException
     */
    public void testConstructor2() {
        try {
            updaterFor("z");
            shouldThrow();
        } catch (IllegalArgumentException success) {}
    }

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

    /**
     * construction using private field from subclass throws RuntimeException
     */
    public void testPrivateFieldInSubclass() {
        new NonNestmates.AtomicLongFieldUpdaterTestSubclass()
            .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() {
        AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
        a = updaterFor("x");
        x = 1;
        assertEquals(1, a.get(this));
        a.set(this, 2);
        assertEquals(2, a.get(this));
        a.set(this, -3);
        assertEquals(-3, a.get(this));
    }

    /**
     * get returns the last value lazySet by same thread
     */
    public void testGetLazySet() {
        AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
        a = updaterFor("x");
        x = 1;
        assertEquals(1, a.get(this));
        a.lazySet(this, 2);
        assertEquals(2, a.get(this));
        a.lazySet(this, -3);
        assertEquals(-3, a.get(this));
    }

    /**
     * compareAndSet succeeds in changing value if equal to expected else fails
     */
    public void testCompareAndSet() {
        AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
        a = updaterFor("x");
        x = 1;
        assertTrue(a.compareAndSet(this, 1, 2));
        assertTrue(a.compareAndSet(this, 2, -4));
        assertEquals(-4, a.get(this));
        assertFalse(a.compareAndSet(this, -5, 7));
        assertEquals(-4, a.get(this));
        assertTrue(a.compareAndSet(this, -4, 7));
        assertEquals(7, a.get(this));
    }

    /**
     * compareAndSet succeeds in changing protected field value if
     * equal to expected else fails
     */
    public void testCompareAndSetProtected() {
        AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
        a = updaterFor("protectedField");
        protectedField = 1;
        assertTrue(a.compareAndSet(this, 1, 2));
        assertTrue(a.compareAndSet(this, 2, -4));
        assertEquals(-4, a.get(this));
        assertFalse(a.compareAndSet(this, -5, 7));
        assertEquals(-4, a.get(this));
        assertTrue(a.compareAndSet(this, -4, 7));
        assertEquals(7, a.get(this));
    }

    /**
     * compareAndSet succeeds in changing protected field value if
     * equal to expected else fails
     */
    public void testCompareAndSetProtectedInSubclass() {
        NonNestmates.AtomicLongFieldUpdaterTestSubclass s =
            new NonNestmates.AtomicLongFieldUpdaterTestSubclass();
        s.checkCompareAndSetProtectedSub();
    }

    /**
     * compareAndSet in one thread enables another waiting for value
     * to succeed
     */
    public void testCompareAndSetInMultipleThreads() throws Exception {
        x = 1;
        final AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
        a = updaterFor("x");

        Thread t = new Thread(new CheckedRunnable() {
            public void realRun() {
                while (!a.compareAndSet(AtomicLongFieldUpdaterTest.this, 2, 3))
                    Thread.yield();
            }});

        t.start();
        assertTrue(a.compareAndSet(this, 1, 2));
        t.join(LONG_DELAY_MS);
        assertFalse(t.isAlive());
        assertEquals(3, a.get(this));
    }

    /**
     * repeated weakCompareAndSet succeeds in changing value when equal
     * to expected
     */
    public void testWeakCompareAndSet() {
        AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
        a = updaterFor("x");
        x = 1;
        do {} while (!a.weakCompareAndSet(this, 1, 2));
        do {} while (!a.weakCompareAndSet(this, 2, -4));
        assertEquals(-4, a.get(this));
        do {} while (!a.weakCompareAndSet(this, -4, 7));
        assertEquals(7, a.get(this));
    }

    /**
     * getAndSet returns previous value and sets to given value
     */
    public void testGetAndSet() {
        AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
        a = updaterFor("x");
        x = 1;
        assertEquals(1, a.getAndSet(this, 0));
        assertEquals(0, a.getAndSet(this, -10));
        assertEquals(-10, a.getAndSet(this, 1));
    }

    /**
     * getAndAdd returns previous value and adds given value
     */
    public void testGetAndAdd() {
        AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
        a = updaterFor("x");
        x = 1;
        assertEquals(1, a.getAndAdd(this, 2));
        assertEquals(3, a.get(this));
        assertEquals(3, a.getAndAdd(this, -4));
        assertEquals(-1, a.get(this));
    }

    /**
     * getAndDecrement returns previous value and decrements
     */
    public void testGetAndDecrement() {
        AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
        a = updaterFor("x");
        x = 1;
        assertEquals(1, a.getAndDecrement(this));
        assertEquals(0, a.getAndDecrement(this));
        assertEquals(-1, a.getAndDecrement(this));
    }

    /**
     * getAndIncrement returns previous value and increments
     */
    public void testGetAndIncrement() {
        AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
        a = updaterFor("x");
        x = 1;
        assertEquals(1, a.getAndIncrement(this));
        assertEquals(2, a.get(this));
        a.set(this, -2);
        assertEquals(-2, a.getAndIncrement(this));
        assertEquals(-1, a.getAndIncrement(this));
        assertEquals(0, a.getAndIncrement(this));
        assertEquals(1, a.get(this));
    }

    /**
     * addAndGet adds given value to current, and returns current value
     */
    public void testAddAndGet() {
        AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
        a = updaterFor("x");
        x = 1;
        assertEquals(3, a.addAndGet(this, 2));
        assertEquals(3, a.get(this));
        assertEquals(-1, a.addAndGet(this, -4));
        assertEquals(-1, a.get(this));
    }

    /**
     * decrementAndGet decrements and returns current value
     */
    public void testDecrementAndGet() {
        AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
        a = updaterFor("x");
        x = 1;
        assertEquals(0, a.decrementAndGet(this));
        assertEquals(-1, a.decrementAndGet(this));
        assertEquals(-2, a.decrementAndGet(this));
        assertEquals(-2, a.get(this));
    }

    /**
     * incrementAndGet increments and returns current value
     */
    public void testIncrementAndGet() {
        AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
        a = updaterFor("x");
        x = 1;
        assertEquals(2, a.incrementAndGet(this));
        assertEquals(2, a.get(this));
        a.set(this, -2);
        assertEquals(-1, a.incrementAndGet(this));
        assertEquals(0, a.incrementAndGet(this));
        assertEquals(1, a.incrementAndGet(this));
        assertEquals(1, a.get(this));
    }

}
Revision:	1.33
Committed:	Wed Sep 20 00:41:13 2017 UTC (6 years, 7 months ago) by jsr166
Branch:	MAIN
Changes since 1.32:	+6 -58 lines
Log Message:	8187607: [Testbug] Atomic*FieldUpdaterTest.checkPrivateAccess uses nested classes
#	Content
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/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.AtomicLongFieldUpdater;
10
11	import junit.framework.Test;
12	import junit.framework.TestSuite;
13
14	public class AtomicLongFieldUpdaterTest extends JSR166TestCase {
15	volatile long x = 0;
16	protected volatile long protectedField;
17	private volatile long privateField;
18	long w;
19	float z;
20	public static void main(String[] args) {
21	main(suite(), args);
22	}
23	public static Test suite() {
24	return new TestSuite(AtomicLongFieldUpdaterTest.class);
25	}
26
27	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> updaterFor(String fieldName) {
28	return AtomicLongFieldUpdater.newUpdater
29	(AtomicLongFieldUpdaterTest.class, fieldName);
30	}
31
32	/**
33	* Construction with non-existent field throws RuntimeException
34	*/
35	public void testConstructor() {
36	try {
37	updaterFor("y");
38	shouldThrow();
39	} catch (RuntimeException success) {
40	assertNotNull(success.getCause());
41	}
42	}
43
44	/**
45	* construction with field not of given type throws IllegalArgumentException
46	*/
47	public void testConstructor2() {
48	try {
49	updaterFor("z");
50	shouldThrow();
51	} catch (IllegalArgumentException success) {}
52	}
53
54	/**
55	* construction with non-volatile field throws IllegalArgumentException
56	*/
57	public void testConstructor3() {
58	try {
59	updaterFor("w");
60	shouldThrow();
61	} catch (IllegalArgumentException success) {}
62	}
63
64	/**
65	* construction using private field from subclass throws RuntimeException
66	*/
67	public void testPrivateFieldInSubclass() {
68	new NonNestmates.AtomicLongFieldUpdaterTestSubclass()
69	.checkPrivateAccess();
70	}
71
72	/**
73	* construction from unrelated class; package access is allowed,
74	* private access is not
75	*/
76	public void testUnrelatedClassAccess() {
77	new NonNestmates().checkPackageAccess(this);
78	new NonNestmates().checkPrivateAccess(this);
79	}
80
81	/**
82	* get returns the last value set or assigned
83	*/
84	public void testGetSet() {
85	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
86	a = updaterFor("x");
87	x = 1;
88	assertEquals(1, a.get(this));
89	a.set(this, 2);
90	assertEquals(2, a.get(this));
91	a.set(this, -3);
92	assertEquals(-3, a.get(this));
93	}
94
95	/**
96	* get returns the last value lazySet by same thread
97	*/
98	public void testGetLazySet() {
99	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
100	a = updaterFor("x");
101	x = 1;
102	assertEquals(1, a.get(this));
103	a.lazySet(this, 2);
104	assertEquals(2, a.get(this));
105	a.lazySet(this, -3);
106	assertEquals(-3, a.get(this));
107	}
108
109	/**
110	* compareAndSet succeeds in changing value if equal to expected else fails
111	*/
112	public void testCompareAndSet() {
113	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
114	a = updaterFor("x");
115	x = 1;
116	assertTrue(a.compareAndSet(this, 1, 2));
117	assertTrue(a.compareAndSet(this, 2, -4));
118	assertEquals(-4, a.get(this));
119	assertFalse(a.compareAndSet(this, -5, 7));
120	assertEquals(-4, a.get(this));
121	assertTrue(a.compareAndSet(this, -4, 7));
122	assertEquals(7, a.get(this));
123	}
124
125	/**
126	* compareAndSet succeeds in changing protected field value if
127	* equal to expected else fails
128	*/
129	public void testCompareAndSetProtected() {
130	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
131	a = updaterFor("protectedField");
132	protectedField = 1;
133	assertTrue(a.compareAndSet(this, 1, 2));
134	assertTrue(a.compareAndSet(this, 2, -4));
135	assertEquals(-4, a.get(this));
136	assertFalse(a.compareAndSet(this, -5, 7));
137	assertEquals(-4, a.get(this));
138	assertTrue(a.compareAndSet(this, -4, 7));
139	assertEquals(7, a.get(this));
140	}
141
142	/**
143	* compareAndSet succeeds in changing protected field value if
144	* equal to expected else fails
145	*/
146	public void testCompareAndSetProtectedInSubclass() {
147	NonNestmates.AtomicLongFieldUpdaterTestSubclass s =
148	new NonNestmates.AtomicLongFieldUpdaterTestSubclass();
149	s.checkCompareAndSetProtectedSub();
150	}
151
152	/**
153	* compareAndSet in one thread enables another waiting for value
154	* to succeed
155	*/
156	public void testCompareAndSetInMultipleThreads() throws Exception {
157	x = 1;
158	final AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
159	a = updaterFor("x");
160
161	Thread t = new Thread(new CheckedRunnable() {
162	public void realRun() {
163	while (!a.compareAndSet(AtomicLongFieldUpdaterTest.this, 2, 3))
164	Thread.yield();
165	}});
166
167	t.start();
168	assertTrue(a.compareAndSet(this, 1, 2));
169	t.join(LONG_DELAY_MS);
170	assertFalse(t.isAlive());
171	assertEquals(3, a.get(this));
172	}
173
174	/**
175	* repeated weakCompareAndSet succeeds in changing value when equal
176	* to expected
177	*/
178	public void testWeakCompareAndSet() {
179	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
180	a = updaterFor("x");
181	x = 1;
182	do {} while (!a.weakCompareAndSet(this, 1, 2));
183	do {} while (!a.weakCompareAndSet(this, 2, -4));
184	assertEquals(-4, a.get(this));
185	do {} while (!a.weakCompareAndSet(this, -4, 7));
186	assertEquals(7, a.get(this));
187	}
188
189	/**
190	* getAndSet returns previous value and sets to given value
191	*/
192	public void testGetAndSet() {
193	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
194	a = updaterFor("x");
195	x = 1;
196	assertEquals(1, a.getAndSet(this, 0));
197	assertEquals(0, a.getAndSet(this, -10));
198	assertEquals(-10, a.getAndSet(this, 1));
199	}
200
201	/**
202	* getAndAdd returns previous value and adds given value
203	*/
204	public void testGetAndAdd() {
205	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
206	a = updaterFor("x");
207	x = 1;
208	assertEquals(1, a.getAndAdd(this, 2));
209	assertEquals(3, a.get(this));
210	assertEquals(3, a.getAndAdd(this, -4));
211	assertEquals(-1, a.get(this));
212	}
213
214	/**
215	* getAndDecrement returns previous value and decrements
216	*/
217	public void testGetAndDecrement() {
218	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
219	a = updaterFor("x");
220	x = 1;
221	assertEquals(1, a.getAndDecrement(this));
222	assertEquals(0, a.getAndDecrement(this));
223	assertEquals(-1, a.getAndDecrement(this));
224	}
225
226	/**
227	* getAndIncrement returns previous value and increments
228	*/
229	public void testGetAndIncrement() {
230	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
231	a = updaterFor("x");
232	x = 1;
233	assertEquals(1, a.getAndIncrement(this));
234	assertEquals(2, a.get(this));
235	a.set(this, -2);
236	assertEquals(-2, a.getAndIncrement(this));
237	assertEquals(-1, a.getAndIncrement(this));
238	assertEquals(0, a.getAndIncrement(this));
239	assertEquals(1, a.get(this));
240	}
241
242	/**
243	* addAndGet adds given value to current, and returns current value
244	*/
245	public void testAddAndGet() {
246	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
247	a = updaterFor("x");
248	x = 1;
249	assertEquals(3, a.addAndGet(this, 2));
250	assertEquals(3, a.get(this));
251	assertEquals(-1, a.addAndGet(this, -4));
252	assertEquals(-1, a.get(this));
253	}
254
255	/**
256	* decrementAndGet decrements and returns current value
257	*/
258	public void testDecrementAndGet() {
259	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
260	a = updaterFor("x");
261	x = 1;
262	assertEquals(0, a.decrementAndGet(this));
263	assertEquals(-1, a.decrementAndGet(this));
264	assertEquals(-2, a.decrementAndGet(this));
265	assertEquals(-2, a.get(this));
266	}
267
268	/**
269	* incrementAndGet increments and returns current value
270	*/
271	public void testIncrementAndGet() {
272	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
273	a = updaterFor("x");
274	x = 1;
275	assertEquals(2, a.incrementAndGet(this));
276	assertEquals(2, a.get(this));
277	a.set(this, -2);
278	assertEquals(-1, a.incrementAndGet(this));
279	assertEquals(0, a.incrementAndGet(this));
280	assertEquals(1, a.incrementAndGet(this));
281	assertEquals(1, a.get(this));
282	}
283
284	}