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
#	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	1.19	* http://creativecommons.org/publicdomain/zero/1.0/
5	jsr166	1.10	* Other contributors include Andrew Wright, Jeffrey Hayes,
6			* Pat Fisher, Mike Judd.
7	dl	1.1	*/
8
9	jsr166	1.21	import java.util.concurrent.atomic.AtomicLongFieldUpdater;
10	dl	1.1
11	jsr166	1.27	import junit.framework.Test;
12			import junit.framework.TestSuite;
13
14	dl	1.2	public class AtomicLongFieldUpdaterTest extends JSR166TestCase {
15	dl	1.1	volatile long x = 0;
16	dl	1.30	protected volatile long protectedField;
17			private volatile long privateField;
18	dl	1.4	long w;
19	dl	1.30	float z;
20	jsr166	1.12	public static void main(String[] args) {
21	jsr166	1.29	main(suite(), args);
22	dl	1.1	}
23			public static Test suite() {
24			return new TestSuite(AtomicLongFieldUpdaterTest.class);
25			}
26
27	jsr166	1.24	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> updaterFor(String fieldName) {
28			return AtomicLongFieldUpdater.newUpdater
29			(AtomicLongFieldUpdaterTest.class, fieldName);
30			}
31
32	dl	1.3	/**
33	dl	1.7	* Construction with non-existent field throws RuntimeException
34	dl	1.3	*/
35	jsr166	1.12	public void testConstructor() {
36	jsr166	1.11	try {
37	jsr166	1.24	updaterFor("y");
38	dl	1.3	shouldThrow();
39	jsr166	1.25	} catch (RuntimeException success) {
40	jsr166	1.26	assertNotNull(success.getCause());
41	jsr166	1.25	}
42	dl	1.1	}
43
44	dl	1.3	/**
45	jsr166	1.25	* construction with field not of given type throws IllegalArgumentException
46	dl	1.3	*/
47	jsr166	1.12	public void testConstructor2() {
48	jsr166	1.11	try {
49	jsr166	1.24	updaterFor("z");
50	dl	1.3	shouldThrow();
51	jsr166	1.25	} catch (IllegalArgumentException success) {}
52	dl	1.1	}
53
54	dl	1.3	/**
55	jsr166	1.25	* construction with non-volatile field throws IllegalArgumentException
56	dl	1.3	*/
57	jsr166	1.12	public void testConstructor3() {
58	jsr166	1.11	try {
59	jsr166	1.24	updaterFor("w");
60	dl	1.3	shouldThrow();
61	jsr166	1.25	} catch (IllegalArgumentException success) {}
62	dl	1.1	}
63
64	dl	1.3	/**
65	dl	1.30	* construction using private field from subclass throws RuntimeException
66			*/
67			public void testPrivateFieldInSubclass() {
68	jsr166	1.33	new NonNestmates.AtomicLongFieldUpdaterTestSubclass()
69			.checkPrivateAccess();
70	dl	1.30	}
71
72			/**
73	jsr166	1.31	* construction from unrelated class; package access is allowed,
74			* private access is not
75	dl	1.30	*/
76			public void testUnrelatedClassAccess() {
77	jsr166	1.33	new NonNestmates().checkPackageAccess(this);
78			new NonNestmates().checkPrivateAccess(this);
79	dl	1.30	}
80
81			/**
82	jsr166	1.18	* get returns the last value set or assigned
83	dl	1.3	*/
84	jsr166	1.12	public void testGetSet() {
85	dl	1.8	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
86	jsr166	1.24	a = updaterFor("x");
87	dl	1.1	x = 1;
88	jsr166	1.22	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	dl	1.1	}
94	dl	1.9
95			/**
96	jsr166	1.18	* get returns the last value lazySet by same thread
97	dl	1.9	*/
98	jsr166	1.12	public void testGetLazySet() {
99	dl	1.9	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
100	jsr166	1.24	a = updaterFor("x");
101	dl	1.9	x = 1;
102	jsr166	1.22	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	dl	1.9	}
108
109	dl	1.3	/**
110	dl	1.4	* compareAndSet succeeds in changing value if equal to expected else fails
111	dl	1.3	*/
112	jsr166	1.12	public void testCompareAndSet() {
113	dl	1.8	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
114	jsr166	1.24	a = updaterFor("x");
115	dl	1.1	x = 1;
116	jsr166	1.22	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	dl	1.1	}
124
125	dl	1.4	/**
126	dl	1.30	* 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	jsr166	1.33	NonNestmates.AtomicLongFieldUpdaterTestSubclass s =
148			new NonNestmates.AtomicLongFieldUpdaterTestSubclass();
149	dl	1.30	s.checkCompareAndSetProtectedSub();
150			}
151
152			/**
153	dl	1.4	* compareAndSet in one thread enables another waiting for value
154			* to succeed
155			*/
156	jsr166	1.13	public void testCompareAndSetInMultipleThreads() throws Exception {
157	dl	1.4	x = 1;
158	jsr166	1.24	final AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
159			a = updaterFor("x");
160	dl	1.4
161	jsr166	1.14	Thread t = new Thread(new CheckedRunnable() {
162			public void realRun() {
163			while (!a.compareAndSet(AtomicLongFieldUpdaterTest.this, 2, 3))
164			Thread.yield();
165			}});
166	jsr166	1.13
167			t.start();
168			assertTrue(a.compareAndSet(this, 1, 2));
169			t.join(LONG_DELAY_MS);
170			assertFalse(t.isAlive());
171	jsr166	1.23	assertEquals(3, a.get(this));
172	dl	1.4	}
173
174	dl	1.3	/**
175	dl	1.4	* repeated weakCompareAndSet succeeds in changing value when equal
176	jsr166	1.10	* to expected
177	dl	1.3	*/
178	jsr166	1.12	public void testWeakCompareAndSet() {
179	dl	1.8	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
180	jsr166	1.24	a = updaterFor("x");
181	dl	1.1	x = 1;
182	jsr166	1.28	do {} while (!a.weakCompareAndSet(this, 1, 2));
183			do {} while (!a.weakCompareAndSet(this, 2, -4));
184	jsr166	1.22	assertEquals(-4, a.get(this));
185	jsr166	1.28	do {} while (!a.weakCompareAndSet(this, -4, 7));
186	jsr166	1.22	assertEquals(7, a.get(this));
187	dl	1.1	}
188
189	dl	1.3	/**
190	jsr166	1.18	* getAndSet returns previous value and sets to given value
191	dl	1.3	*/
192	jsr166	1.12	public void testGetAndSet() {
193	dl	1.8	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
194	jsr166	1.24	a = updaterFor("x");
195	dl	1.1	x = 1;
196	jsr166	1.22	assertEquals(1, a.getAndSet(this, 0));
197			assertEquals(0, a.getAndSet(this, -10));
198			assertEquals(-10, a.getAndSet(this, 1));
199	dl	1.1	}
200
201	dl	1.3	/**
202	dl	1.4	* getAndAdd returns previous value and adds given value
203	dl	1.3	*/
204	jsr166	1.12	public void testGetAndAdd() {
205	dl	1.8	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
206	jsr166	1.24	a = updaterFor("x");
207	dl	1.1	x = 1;
208	jsr166	1.22	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	dl	1.1	}
213
214	dl	1.3	/**
215	dl	1.4	* getAndDecrement returns previous value and decrements
216	dl	1.3	*/
217	jsr166	1.12	public void testGetAndDecrement() {
218	dl	1.8	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
219	jsr166	1.24	a = updaterFor("x");
220	dl	1.1	x = 1;
221	jsr166	1.22	assertEquals(1, a.getAndDecrement(this));
222			assertEquals(0, a.getAndDecrement(this));
223			assertEquals(-1, a.getAndDecrement(this));
224	dl	1.1	}
225
226	dl	1.3	/**
227	dl	1.4	* getAndIncrement returns previous value and increments
228	dl	1.3	*/
229	jsr166	1.12	public void testGetAndIncrement() {
230	dl	1.8	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
231	jsr166	1.24	a = updaterFor("x");
232	dl	1.1	x = 1;
233	jsr166	1.22	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	dl	1.1	}
241
242	dl	1.3	/**
243	dl	1.4	* addAndGet adds given value to current, and returns current value
244	dl	1.3	*/
245	jsr166	1.12	public void testAddAndGet() {
246	dl	1.8	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
247	jsr166	1.24	a = updaterFor("x");
248	dl	1.1	x = 1;
249	jsr166	1.22	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	dl	1.1	}
254
255	dl	1.3	/**
256	jsr166	1.18	* decrementAndGet decrements and returns current value
257	dl	1.3	*/
258	jsr166	1.12	public void testDecrementAndGet() {
259	dl	1.8	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
260	jsr166	1.24	a = updaterFor("x");
261	dl	1.1	x = 1;
262	jsr166	1.22	assertEquals(0, a.decrementAndGet(this));
263			assertEquals(-1, a.decrementAndGet(this));
264			assertEquals(-2, a.decrementAndGet(this));
265			assertEquals(-2, a.get(this));
266	dl	1.1	}
267
268	dl	1.3	/**
269	dl	1.4	* incrementAndGet increments and returns current value
270	dl	1.3	*/
271	jsr166	1.12	public void testIncrementAndGet() {
272	dl	1.8	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
273	jsr166	1.24	a = updaterFor("x");
274	dl	1.1	x = 1;
275	jsr166	1.22	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	dl	1.1	}
283
284			}