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);
    }

    // for testing subclass access
    static class AtomicLongFieldUpdaterTestSubclass extends AtomicLongFieldUpdaterTest {
        public void checkPrivateAccess() {
            try {
                AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a =
                    AtomicLongFieldUpdater.newUpdater
                    (AtomicLongFieldUpdaterTest.class, "privateField");
                shouldThrow();
            } catch (RuntimeException success) {
                assertNotNull(success.getCause());
            }
        }

        public void checkCompareAndSetProtectedSub() {
            AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a =
                AtomicLongFieldUpdater.newUpdater
                (AtomicLongFieldUpdaterTest.class, "protectedField");
            this.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));
        }
    }

    static class UnrelatedClass {
        public void checkPackageAccess(AtomicLongFieldUpdaterTest obj) {
            obj.x = 72L;
            AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a =
                AtomicLongFieldUpdater.newUpdater
                (AtomicLongFieldUpdaterTest.class, "x");
            assertEquals(72L, a.get(obj));
            assertTrue(a.compareAndSet(obj, 72L, 73L));
            assertEquals(73L, a.get(obj));
        }

        public void checkPrivateAccess(AtomicLongFieldUpdaterTest obj) {
            try {
                AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a =
                    AtomicLongFieldUpdater.newUpdater
                    (AtomicLongFieldUpdaterTest.class, "privateField");
                throw new AssertionError("should throw");
            } catch (RuntimeException success) {
                assertNotNull(success.getCause());
            }
        }
    }

    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() {
        AtomicLongFieldUpdaterTestSubclass s =
            new AtomicLongFieldUpdaterTestSubclass();
        s.checkPrivateAccess();
    }

    /**
     * construction from unrelated class; package access is allowed,
     * private access is not
     */
    public void testUnrelatedClassAccess() {
        new UnrelatedClass().checkPackageAccess(this);
        new UnrelatedClass().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() {
        AtomicLongFieldUpdaterTestSubclass s =
            new 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:	1.32
Committed:	Mon Nov 9 18:42:41 2015 UTC (8 years, 6 months ago) by jsr166
Branch:	MAIN
Changes since 1.31:	+4 -3 lines
Log Message:	improve tests for caller class != declaring class
#	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	// for testing subclass access
28	static class AtomicLongFieldUpdaterTestSubclass extends AtomicLongFieldUpdaterTest {
29	public void checkPrivateAccess() {
30	try {
31	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a =
32	AtomicLongFieldUpdater.newUpdater
33	(AtomicLongFieldUpdaterTest.class, "privateField");
34	shouldThrow();
35	} catch (RuntimeException success) {
36	assertNotNull(success.getCause());
37	}
38	}
39
40	public void checkCompareAndSetProtectedSub() {
41	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a =
42	AtomicLongFieldUpdater.newUpdater
43	(AtomicLongFieldUpdaterTest.class, "protectedField");
44	this.protectedField = 1;
45	assertTrue(a.compareAndSet(this, 1, 2));
46	assertTrue(a.compareAndSet(this, 2, -4));
47	assertEquals(-4, a.get(this));
48	assertFalse(a.compareAndSet(this, -5, 7));
49	assertEquals(-4, a.get(this));
50	assertTrue(a.compareAndSet(this, -4, 7));
51	assertEquals(7, a.get(this));
52	}
53	}
54
55	static class UnrelatedClass {
56	public void checkPackageAccess(AtomicLongFieldUpdaterTest obj) {
57	obj.x = 72L;
58	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a =
59	AtomicLongFieldUpdater.newUpdater
60	(AtomicLongFieldUpdaterTest.class, "x");
61	assertEquals(72L, a.get(obj));
62	assertTrue(a.compareAndSet(obj, 72L, 73L));
63	assertEquals(73L, a.get(obj));
64	}
65
66	public void checkPrivateAccess(AtomicLongFieldUpdaterTest obj) {
67	try {
68	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a =
69	AtomicLongFieldUpdater.newUpdater
70	(AtomicLongFieldUpdaterTest.class, "privateField");
71	throw new AssertionError("should throw");
72	} catch (RuntimeException success) {
73	assertNotNull(success.getCause());
74	}
75	}
76	}
77
78	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> updaterFor(String fieldName) {
79	return AtomicLongFieldUpdater.newUpdater
80	(AtomicLongFieldUpdaterTest.class, fieldName);
81	}
82
83	/**
84	* Construction with non-existent field throws RuntimeException
85	*/
86	public void testConstructor() {
87	try {
88	updaterFor("y");
89	shouldThrow();
90	} catch (RuntimeException success) {
91	assertNotNull(success.getCause());
92	}
93	}
94
95	/**
96	* construction with field not of given type throws IllegalArgumentException
97	*/
98	public void testConstructor2() {
99	try {
100	updaterFor("z");
101	shouldThrow();
102	} catch (IllegalArgumentException success) {}
103	}
104
105	/**
106	* construction with non-volatile field throws IllegalArgumentException
107	*/
108	public void testConstructor3() {
109	try {
110	updaterFor("w");
111	shouldThrow();
112	} catch (IllegalArgumentException success) {}
113	}
114
115	/**
116	* construction using private field from subclass throws RuntimeException
117	*/
118	public void testPrivateFieldInSubclass() {
119	AtomicLongFieldUpdaterTestSubclass s =
120	new AtomicLongFieldUpdaterTestSubclass();
121	s.checkPrivateAccess();
122	}
123
124	/**
125	* construction from unrelated class; package access is allowed,
126	* private access is not
127	*/
128	public void testUnrelatedClassAccess() {
129	new UnrelatedClass().checkPackageAccess(this);
130	new UnrelatedClass().checkPrivateAccess(this);
131	}
132
133	/**
134	* get returns the last value set or assigned
135	*/
136	public void testGetSet() {
137	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
138	a = updaterFor("x");
139	x = 1;
140	assertEquals(1, a.get(this));
141	a.set(this, 2);
142	assertEquals(2, a.get(this));
143	a.set(this, -3);
144	assertEquals(-3, a.get(this));
145	}
146
147	/**
148	* get returns the last value lazySet by same thread
149	*/
150	public void testGetLazySet() {
151	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
152	a = updaterFor("x");
153	x = 1;
154	assertEquals(1, a.get(this));
155	a.lazySet(this, 2);
156	assertEquals(2, a.get(this));
157	a.lazySet(this, -3);
158	assertEquals(-3, a.get(this));
159	}
160
161	/**
162	* compareAndSet succeeds in changing value if equal to expected else fails
163	*/
164	public void testCompareAndSet() {
165	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
166	a = updaterFor("x");
167	x = 1;
168	assertTrue(a.compareAndSet(this, 1, 2));
169	assertTrue(a.compareAndSet(this, 2, -4));
170	assertEquals(-4, a.get(this));
171	assertFalse(a.compareAndSet(this, -5, 7));
172	assertEquals(-4, a.get(this));
173	assertTrue(a.compareAndSet(this, -4, 7));
174	assertEquals(7, a.get(this));
175	}
176
177	/**
178	* compareAndSet succeeds in changing protected field value if
179	* equal to expected else fails
180	*/
181	public void testCompareAndSetProtected() {
182	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
183	a = updaterFor("protectedField");
184	protectedField = 1;
185	assertTrue(a.compareAndSet(this, 1, 2));
186	assertTrue(a.compareAndSet(this, 2, -4));
187	assertEquals(-4, a.get(this));
188	assertFalse(a.compareAndSet(this, -5, 7));
189	assertEquals(-4, a.get(this));
190	assertTrue(a.compareAndSet(this, -4, 7));
191	assertEquals(7, a.get(this));
192	}
193
194	/**
195	* compareAndSet succeeds in changing protected field value if
196	* equal to expected else fails
197	*/
198	public void testCompareAndSetProtectedInSubclass() {
199	AtomicLongFieldUpdaterTestSubclass s =
200	new AtomicLongFieldUpdaterTestSubclass();
201	s.checkCompareAndSetProtectedSub();
202	}
203
204	/**
205	* compareAndSet in one thread enables another waiting for value
206	* to succeed
207	*/
208	public void testCompareAndSetInMultipleThreads() throws Exception {
209	x = 1;
210	final AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
211	a = updaterFor("x");
212
213	Thread t = new Thread(new CheckedRunnable() {
214	public void realRun() {
215	while (!a.compareAndSet(AtomicLongFieldUpdaterTest.this, 2, 3))
216	Thread.yield();
217	}});
218
219	t.start();
220	assertTrue(a.compareAndSet(this, 1, 2));
221	t.join(LONG_DELAY_MS);
222	assertFalse(t.isAlive());
223	assertEquals(3, a.get(this));
224	}
225
226	/**
227	* repeated weakCompareAndSet succeeds in changing value when equal
228	* to expected
229	*/
230	public void testWeakCompareAndSet() {
231	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
232	a = updaterFor("x");
233	x = 1;
234	do {} while (!a.weakCompareAndSet(this, 1, 2));
235	do {} while (!a.weakCompareAndSet(this, 2, -4));
236	assertEquals(-4, a.get(this));
237	do {} while (!a.weakCompareAndSet(this, -4, 7));
238	assertEquals(7, a.get(this));
239	}
240
241	/**
242	* getAndSet returns previous value and sets to given value
243	*/
244	public void testGetAndSet() {
245	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
246	a = updaterFor("x");
247	x = 1;
248	assertEquals(1, a.getAndSet(this, 0));
249	assertEquals(0, a.getAndSet(this, -10));
250	assertEquals(-10, a.getAndSet(this, 1));
251	}
252
253	/**
254	* getAndAdd returns previous value and adds given value
255	*/
256	public void testGetAndAdd() {
257	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
258	a = updaterFor("x");
259	x = 1;
260	assertEquals(1, a.getAndAdd(this, 2));
261	assertEquals(3, a.get(this));
262	assertEquals(3, a.getAndAdd(this, -4));
263	assertEquals(-1, a.get(this));
264	}
265
266	/**
267	* getAndDecrement returns previous value and decrements
268	*/
269	public void testGetAndDecrement() {
270	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
271	a = updaterFor("x");
272	x = 1;
273	assertEquals(1, a.getAndDecrement(this));
274	assertEquals(0, a.getAndDecrement(this));
275	assertEquals(-1, a.getAndDecrement(this));
276	}
277
278	/**
279	* getAndIncrement returns previous value and increments
280	*/
281	public void testGetAndIncrement() {
282	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
283	a = updaterFor("x");
284	x = 1;
285	assertEquals(1, a.getAndIncrement(this));
286	assertEquals(2, a.get(this));
287	a.set(this, -2);
288	assertEquals(-2, a.getAndIncrement(this));
289	assertEquals(-1, a.getAndIncrement(this));
290	assertEquals(0, a.getAndIncrement(this));
291	assertEquals(1, a.get(this));
292	}
293
294	/**
295	* addAndGet adds given value to current, and returns current value
296	*/
297	public void testAddAndGet() {
298	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
299	a = updaterFor("x");
300	x = 1;
301	assertEquals(3, a.addAndGet(this, 2));
302	assertEquals(3, a.get(this));
303	assertEquals(-1, a.addAndGet(this, -4));
304	assertEquals(-1, a.get(this));
305	}
306
307	/**
308	* decrementAndGet decrements and returns current value
309	*/
310	public void testDecrementAndGet() {
311	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
312	a = updaterFor("x");
313	x = 1;
314	assertEquals(0, a.decrementAndGet(this));
315	assertEquals(-1, a.decrementAndGet(this));
316	assertEquals(-2, a.decrementAndGet(this));
317	assertEquals(-2, a.get(this));
318	}
319
320	/**
321	* incrementAndGet increments and returns current value
322	*/
323	public void testIncrementAndGet() {
324	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
325	a = updaterFor("x");
326	x = 1;
327	assertEquals(2, a.incrementAndGet(this));
328	assertEquals(2, a.get(this));
329	a.set(this, -2);
330	assertEquals(-1, a.incrementAndGet(this));
331	assertEquals(0, a.incrementAndGet(this));
332	assertEquals(1, a.incrementAndGet(this));
333	assertEquals(1, a.get(this));
334	}
335
336	}