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;
            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));
        }
    }

    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:	1.31
Committed:	Mon Nov 9 07:54:28 2015 UTC (8 years, 6 months ago) by jsr166
Branch:	MAIN
Changes since 1.30:	+19 -9 lines
Log Message:	improve "UnrelatedClass" tests
#	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	a = updaterFor("protectedField");
43	protectedField = 1;
44	assertTrue(a.compareAndSet(this, 1, 2));
45	assertTrue(a.compareAndSet(this, 2, -4));
46	assertEquals(-4, a.get(this));
47	assertFalse(a.compareAndSet(this, -5, 7));
48	assertEquals(-4, a.get(this));
49	assertTrue(a.compareAndSet(this, -4, 7));
50	assertEquals(7, a.get(this));
51	}
52	}
53
54	static class UnrelatedClass {
55	public void checkPackageAccess(AtomicLongFieldUpdaterTest obj) {
56	obj.x = 72L;
57	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a =
58	AtomicLongFieldUpdater.newUpdater
59	(AtomicLongFieldUpdaterTest.class, "x");
60	assertEquals(72L, a.get(obj));
61	assertTrue(a.compareAndSet(obj, 72L, 73L));
62	assertEquals(73L, a.get(obj));
63	}
64
65	public void checkPrivateAccess(AtomicLongFieldUpdaterTest obj) {
66	try {
67	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a =
68	AtomicLongFieldUpdater.newUpdater
69	(AtomicLongFieldUpdaterTest.class, "privateField");
70	throw new AssertionError("should throw");
71	} catch (RuntimeException success) {
72	assertNotNull(success.getCause());
73	}
74	}
75	}
76
77	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> updaterFor(String fieldName) {
78	return AtomicLongFieldUpdater.newUpdater
79	(AtomicLongFieldUpdaterTest.class, fieldName);
80	}
81
82	/**
83	* Construction with non-existent field throws RuntimeException
84	*/
85	public void testConstructor() {
86	try {
87	updaterFor("y");
88	shouldThrow();
89	} catch (RuntimeException success) {
90	assertNotNull(success.getCause());
91	}
92	}
93
94	/**
95	* construction with field not of given type throws IllegalArgumentException
96	*/
97	public void testConstructor2() {
98	try {
99	updaterFor("z");
100	shouldThrow();
101	} catch (IllegalArgumentException success) {}
102	}
103
104	/**
105	* construction with non-volatile field throws IllegalArgumentException
106	*/
107	public void testConstructor3() {
108	try {
109	updaterFor("w");
110	shouldThrow();
111	} catch (IllegalArgumentException success) {}
112	}
113
114	/**
115	* construction using private field from subclass throws RuntimeException
116	*/
117	public void testPrivateFieldInSubclass() {
118	AtomicLongFieldUpdaterTestSubclass s =
119	new AtomicLongFieldUpdaterTestSubclass();
120	s.checkPrivateAccess();
121	}
122
123	/**
124	* construction from unrelated class; package access is allowed,
125	* private access is not
126	*/
127	public void testUnrelatedClassAccess() {
128	new UnrelatedClass().checkPackageAccess(this);
129	new UnrelatedClass().checkPrivateAccess(this);
130	}
131
132	/**
133	* get returns the last value set or assigned
134	*/
135	public void testGetSet() {
136	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
137	a = updaterFor("x");
138	x = 1;
139	assertEquals(1, a.get(this));
140	a.set(this, 2);
141	assertEquals(2, a.get(this));
142	a.set(this, -3);
143	assertEquals(-3, a.get(this));
144	}
145
146	/**
147	* get returns the last value lazySet by same thread
148	*/
149	public void testGetLazySet() {
150	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
151	a = updaterFor("x");
152	x = 1;
153	assertEquals(1, a.get(this));
154	a.lazySet(this, 2);
155	assertEquals(2, a.get(this));
156	a.lazySet(this, -3);
157	assertEquals(-3, a.get(this));
158	}
159
160	/**
161	* compareAndSet succeeds in changing value if equal to expected else fails
162	*/
163	public void testCompareAndSet() {
164	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
165	a = updaterFor("x");
166	x = 1;
167	assertTrue(a.compareAndSet(this, 1, 2));
168	assertTrue(a.compareAndSet(this, 2, -4));
169	assertEquals(-4, a.get(this));
170	assertFalse(a.compareAndSet(this, -5, 7));
171	assertEquals(-4, a.get(this));
172	assertTrue(a.compareAndSet(this, -4, 7));
173	assertEquals(7, a.get(this));
174	}
175
176	/**
177	* compareAndSet succeeds in changing protected field value if
178	* equal to expected else fails
179	*/
180	public void testCompareAndSetProtected() {
181	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
182	a = updaterFor("protectedField");
183	protectedField = 1;
184	assertTrue(a.compareAndSet(this, 1, 2));
185	assertTrue(a.compareAndSet(this, 2, -4));
186	assertEquals(-4, a.get(this));
187	assertFalse(a.compareAndSet(this, -5, 7));
188	assertEquals(-4, a.get(this));
189	assertTrue(a.compareAndSet(this, -4, 7));
190	assertEquals(7, a.get(this));
191	}
192
193	/**
194	* compareAndSet succeeds in changing protected field value if
195	* equal to expected else fails
196	*/
197	public void testCompareAndSetProtectedInSubclass() {
198	AtomicLongFieldUpdaterTestSubclass s =
199	new AtomicLongFieldUpdaterTestSubclass();
200	s.checkCompareAndSetProtectedSub();
201	}
202
203	/**
204	* compareAndSet in one thread enables another waiting for value
205	* to succeed
206	*/
207	public void testCompareAndSetInMultipleThreads() throws Exception {
208	x = 1;
209	final AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
210	a = updaterFor("x");
211
212	Thread t = new Thread(new CheckedRunnable() {
213	public void realRun() {
214	while (!a.compareAndSet(AtomicLongFieldUpdaterTest.this, 2, 3))
215	Thread.yield();
216	}});
217
218	t.start();
219	assertTrue(a.compareAndSet(this, 1, 2));
220	t.join(LONG_DELAY_MS);
221	assertFalse(t.isAlive());
222	assertEquals(3, a.get(this));
223	}
224
225	/**
226	* repeated weakCompareAndSet succeeds in changing value when equal
227	* to expected
228	*/
229	public void testWeakCompareAndSet() {
230	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
231	a = updaterFor("x");
232	x = 1;
233	do {} while (!a.weakCompareAndSet(this, 1, 2));
234	do {} while (!a.weakCompareAndSet(this, 2, -4));
235	assertEquals(-4, a.get(this));
236	do {} while (!a.weakCompareAndSet(this, -4, 7));
237	assertEquals(7, a.get(this));
238	}
239
240	/**
241	* getAndSet returns previous value and sets to given value
242	*/
243	public void testGetAndSet() {
244	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
245	a = updaterFor("x");
246	x = 1;
247	assertEquals(1, a.getAndSet(this, 0));
248	assertEquals(0, a.getAndSet(this, -10));
249	assertEquals(-10, a.getAndSet(this, 1));
250	}
251
252	/**
253	* getAndAdd returns previous value and adds given value
254	*/
255	public void testGetAndAdd() {
256	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
257	a = updaterFor("x");
258	x = 1;
259	assertEquals(1, a.getAndAdd(this, 2));
260	assertEquals(3, a.get(this));
261	assertEquals(3, a.getAndAdd(this, -4));
262	assertEquals(-1, a.get(this));
263	}
264
265	/**
266	* getAndDecrement returns previous value and decrements
267	*/
268	public void testGetAndDecrement() {
269	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
270	a = updaterFor("x");
271	x = 1;
272	assertEquals(1, a.getAndDecrement(this));
273	assertEquals(0, a.getAndDecrement(this));
274	assertEquals(-1, a.getAndDecrement(this));
275	}
276
277	/**
278	* getAndIncrement returns previous value and increments
279	*/
280	public void testGetAndIncrement() {
281	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
282	a = updaterFor("x");
283	x = 1;
284	assertEquals(1, a.getAndIncrement(this));
285	assertEquals(2, a.get(this));
286	a.set(this, -2);
287	assertEquals(-2, a.getAndIncrement(this));
288	assertEquals(-1, a.getAndIncrement(this));
289	assertEquals(0, a.getAndIncrement(this));
290	assertEquals(1, a.get(this));
291	}
292
293	/**
294	* addAndGet adds given value to current, and returns current value
295	*/
296	public void testAddAndGet() {
297	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
298	a = updaterFor("x");
299	x = 1;
300	assertEquals(3, a.addAndGet(this, 2));
301	assertEquals(3, a.get(this));
302	assertEquals(-1, a.addAndGet(this, -4));
303	assertEquals(-1, a.get(this));
304	}
305
306	/**
307	* decrementAndGet decrements and returns current value
308	*/
309	public void testDecrementAndGet() {
310	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
311	a = updaterFor("x");
312	x = 1;
313	assertEquals(0, a.decrementAndGet(this));
314	assertEquals(-1, a.decrementAndGet(this));
315	assertEquals(-2, a.decrementAndGet(this));
316	assertEquals(-2, a.get(this));
317	}
318
319	/**
320	* incrementAndGet increments and returns current value
321	*/
322	public void testIncrementAndGet() {
323	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
324	a = updaterFor("x");
325	x = 1;
326	assertEquals(2, a.incrementAndGet(this));
327	assertEquals(2, a.get(this));
328	a.set(this, -2);
329	assertEquals(-1, a.incrementAndGet(this));
330	assertEquals(0, a.incrementAndGet(this));
331	assertEquals(1, a.incrementAndGet(this));
332	assertEquals(1, a.get(this));
333	}
334
335	}