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 junit.framework.*;
import java.util.concurrent.atomic.AtomicLongFieldUpdater;

public class AtomicLongFieldUpdaterTest extends JSR166TestCase {
    volatile long x = 0;
    int z;
    long w;

    public static void main(String[] args) {
        junit.textui.TestRunner.run(suite());
    }
    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) {}
    }

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

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

    /**
     * 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 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;
        while (!a.weakCompareAndSet(this, 1, 2));
        while (!a.weakCompareAndSet(this, 2, -4));
        assertEquals(-4, a.get(this));
        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:	1.24
Committed:	Mon Apr 1 20:58:58 2013 UTC (11 years, 1 month ago) by jsr166
Branch:	MAIN
Changes since 1.23:	+21 -70 lines
Log Message:	RuntimeException is not ok for valid fields; refactor a little
#	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			import junit.framework.*;
10	jsr166	1.21	import java.util.concurrent.atomic.AtomicLongFieldUpdater;
11	dl	1.1
12	dl	1.2	public class AtomicLongFieldUpdaterTest extends JSR166TestCase {
13	dl	1.1	volatile long x = 0;
14	dl	1.4	int z;
15			long w;
16	dl	1.1
17	jsr166	1.12	public static void main(String[] args) {
18	dl	1.1	junit.textui.TestRunner.run(suite());
19			}
20			public static Test suite() {
21			return new TestSuite(AtomicLongFieldUpdaterTest.class);
22			}
23
24	jsr166	1.24	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> updaterFor(String fieldName) {
25			return AtomicLongFieldUpdater.newUpdater
26			(AtomicLongFieldUpdaterTest.class, fieldName);
27			}
28
29	dl	1.3	/**
30	dl	1.7	* Construction with non-existent field throws RuntimeException
31	dl	1.3	*/
32	jsr166	1.12	public void testConstructor() {
33	jsr166	1.11	try {
34	jsr166	1.24	updaterFor("y");
35	dl	1.3	shouldThrow();
36	jsr166	1.16	} catch (RuntimeException success) {}
37	dl	1.1	}
38
39	dl	1.3	/**
40	dl	1.4	* construction with field not of given type throws RuntimeException
41	dl	1.3	*/
42	jsr166	1.12	public void testConstructor2() {
43	jsr166	1.11	try {
44	jsr166	1.24	updaterFor("z");
45	dl	1.3	shouldThrow();
46	jsr166	1.16	} catch (RuntimeException success) {}
47	dl	1.1	}
48
49	dl	1.3	/**
50	dl	1.4	* construction with non-volatile field throws RuntimeException
51	dl	1.3	*/
52	jsr166	1.12	public void testConstructor3() {
53	jsr166	1.11	try {
54	jsr166	1.24	updaterFor("w");
55	dl	1.3	shouldThrow();
56	jsr166	1.16	} catch (RuntimeException success) {}
57	dl	1.1	}
58
59	dl	1.3	/**
60	jsr166	1.18	* get returns the last value set or assigned
61	dl	1.3	*/
62	jsr166	1.12	public void testGetSet() {
63	dl	1.8	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
64	jsr166	1.24	a = updaterFor("x");
65	dl	1.1	x = 1;
66	jsr166	1.22	assertEquals(1, a.get(this));
67			a.set(this, 2);
68			assertEquals(2, a.get(this));
69			a.set(this, -3);
70			assertEquals(-3, a.get(this));
71	dl	1.1	}
72	dl	1.9
73			/**
74	jsr166	1.18	* get returns the last value lazySet by same thread
75	dl	1.9	*/
76	jsr166	1.12	public void testGetLazySet() {
77	dl	1.9	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
78	jsr166	1.24	a = updaterFor("x");
79	dl	1.9	x = 1;
80	jsr166	1.22	assertEquals(1, a.get(this));
81			a.lazySet(this, 2);
82			assertEquals(2, a.get(this));
83			a.lazySet(this, -3);
84			assertEquals(-3, a.get(this));
85	dl	1.9	}
86
87	dl	1.3	/**
88	dl	1.4	* compareAndSet succeeds in changing value if equal to expected else fails
89	dl	1.3	*/
90	jsr166	1.12	public void testCompareAndSet() {
91	dl	1.8	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
92	jsr166	1.24	a = updaterFor("x");
93	dl	1.1	x = 1;
94	jsr166	1.22	assertTrue(a.compareAndSet(this, 1, 2));
95			assertTrue(a.compareAndSet(this, 2, -4));
96			assertEquals(-4, a.get(this));
97			assertFalse(a.compareAndSet(this, -5, 7));
98			assertEquals(-4, a.get(this));
99			assertTrue(a.compareAndSet(this, -4, 7));
100			assertEquals(7, a.get(this));
101	dl	1.1	}
102
103	dl	1.4	/**
104			* compareAndSet in one thread enables another waiting for value
105			* to succeed
106			*/
107	jsr166	1.13	public void testCompareAndSetInMultipleThreads() throws Exception {
108	dl	1.4	x = 1;
109	jsr166	1.24	final AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
110			a = updaterFor("x");
111	dl	1.4
112	jsr166	1.14	Thread t = new Thread(new CheckedRunnable() {
113			public void realRun() {
114			while (!a.compareAndSet(AtomicLongFieldUpdaterTest.this, 2, 3))
115			Thread.yield();
116			}});
117	jsr166	1.13
118			t.start();
119			assertTrue(a.compareAndSet(this, 1, 2));
120			t.join(LONG_DELAY_MS);
121			assertFalse(t.isAlive());
122	jsr166	1.23	assertEquals(3, a.get(this));
123	dl	1.4	}
124
125	dl	1.3	/**
126	dl	1.4	* repeated weakCompareAndSet succeeds in changing value when equal
127	jsr166	1.10	* to expected
128	dl	1.3	*/
129	jsr166	1.12	public void testWeakCompareAndSet() {
130	dl	1.8	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
131	jsr166	1.24	a = updaterFor("x");
132	dl	1.1	x = 1;
133	jsr166	1.22	while (!a.weakCompareAndSet(this, 1, 2));
134			while (!a.weakCompareAndSet(this, 2, -4));
135			assertEquals(-4, a.get(this));
136			while (!a.weakCompareAndSet(this, -4, 7));
137			assertEquals(7, a.get(this));
138	dl	1.1	}
139
140	dl	1.3	/**
141	jsr166	1.18	* getAndSet returns previous value and sets to given value
142	dl	1.3	*/
143	jsr166	1.12	public void testGetAndSet() {
144	dl	1.8	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
145	jsr166	1.24	a = updaterFor("x");
146	dl	1.1	x = 1;
147	jsr166	1.22	assertEquals(1, a.getAndSet(this, 0));
148			assertEquals(0, a.getAndSet(this, -10));
149			assertEquals(-10, a.getAndSet(this, 1));
150	dl	1.1	}
151
152	dl	1.3	/**
153	dl	1.4	* getAndAdd returns previous value and adds given value
154	dl	1.3	*/
155	jsr166	1.12	public void testGetAndAdd() {
156	dl	1.8	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
157	jsr166	1.24	a = updaterFor("x");
158	dl	1.1	x = 1;
159	jsr166	1.22	assertEquals(1, a.getAndAdd(this, 2));
160			assertEquals(3, a.get(this));
161			assertEquals(3, a.getAndAdd(this, -4));
162			assertEquals(-1, a.get(this));
163	dl	1.1	}
164
165	dl	1.3	/**
166	dl	1.4	* getAndDecrement returns previous value and decrements
167	dl	1.3	*/
168	jsr166	1.12	public void testGetAndDecrement() {
169	dl	1.8	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
170	jsr166	1.24	a = updaterFor("x");
171	dl	1.1	x = 1;
172	jsr166	1.22	assertEquals(1, a.getAndDecrement(this));
173			assertEquals(0, a.getAndDecrement(this));
174			assertEquals(-1, a.getAndDecrement(this));
175	dl	1.1	}
176
177	dl	1.3	/**
178	dl	1.4	* getAndIncrement returns previous value and increments
179	dl	1.3	*/
180	jsr166	1.12	public void testGetAndIncrement() {
181	dl	1.8	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
182	jsr166	1.24	a = updaterFor("x");
183	dl	1.1	x = 1;
184	jsr166	1.22	assertEquals(1, a.getAndIncrement(this));
185			assertEquals(2, a.get(this));
186			a.set(this, -2);
187			assertEquals(-2, a.getAndIncrement(this));
188			assertEquals(-1, a.getAndIncrement(this));
189			assertEquals(0, a.getAndIncrement(this));
190			assertEquals(1, a.get(this));
191	dl	1.1	}
192
193	dl	1.3	/**
194	dl	1.4	* addAndGet adds given value to current, and returns current value
195	dl	1.3	*/
196	jsr166	1.12	public void testAddAndGet() {
197	dl	1.8	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
198	jsr166	1.24	a = updaterFor("x");
199	dl	1.1	x = 1;
200	jsr166	1.22	assertEquals(3, a.addAndGet(this, 2));
201			assertEquals(3, a.get(this));
202			assertEquals(-1, a.addAndGet(this, -4));
203			assertEquals(-1, a.get(this));
204	dl	1.1	}
205
206	dl	1.3	/**
207	jsr166	1.18	* decrementAndGet decrements and returns current value
208	dl	1.3	*/
209	jsr166	1.12	public void testDecrementAndGet() {
210	dl	1.8	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
211	jsr166	1.24	a = updaterFor("x");
212	dl	1.1	x = 1;
213	jsr166	1.22	assertEquals(0, a.decrementAndGet(this));
214			assertEquals(-1, a.decrementAndGet(this));
215			assertEquals(-2, a.decrementAndGet(this));
216			assertEquals(-2, a.get(this));
217	dl	1.1	}
218
219	dl	1.3	/**
220	dl	1.4	* incrementAndGet increments and returns current value
221	dl	1.3	*/
222	jsr166	1.12	public void testIncrementAndGet() {
223	dl	1.8	AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a;
224	jsr166	1.24	a = updaterFor("x");
225	dl	1.1	x = 1;
226	jsr166	1.22	assertEquals(2, a.incrementAndGet(this));
227			assertEquals(2, a.get(this));
228			a.set(this, -2);
229			assertEquals(-1, a.incrementAndGet(this));
230			assertEquals(0, a.incrementAndGet(this));
231			assertEquals(1, a.incrementAndGet(this));
232			assertEquals(1, a.get(this));
233	dl	1.1	}
234
235			}