test/tck/AtomicIntegerFieldUpdaterTest.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.AtomicIntegerFieldUpdater;

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

public class AtomicIntegerFieldUpdaterTest extends JSR166TestCase {
    volatile int x = 0;
    int w;
    long z;
    public static void main(String[] args) {
        main(suite(), args);
    }
    public static Test suite() {
        return new TestSuite(AtomicIntegerFieldUpdaterTest.class);
    }

    AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> updaterFor(String fieldName) {
        return AtomicIntegerFieldUpdater.newUpdater
            (AtomicIntegerFieldUpdaterTest.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) {}
    }

    /**
     * get returns the last value set or assigned
     */
    public void testGetSet() {
        AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> 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() {
        AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> 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() {
        AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> 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 AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
        a = updaterFor("x");

        Thread t = new Thread(new CheckedRunnable() {
            public void realRun() {
                while (!a.compareAndSet(AtomicIntegerFieldUpdaterTest.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() {
        AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> 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() {
        AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> 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() {
        AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> 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() {
        AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> 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() {
        AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> 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() {
        AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> 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() {
        AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> 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() {
        AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> 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:	1.29
Committed:	Sat Apr 25 04:55:30 2015 UTC (9 years ago) by jsr166
Branch:	MAIN
Changes since 1.28:	+1 -1 lines
Log Message:	improve main methods; respect system properties; actually fail if a test fails
#	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.AtomicIntegerFieldUpdater;
10	dl	1.1
11	jsr166	1.27	import junit.framework.Test;
12			import junit.framework.TestSuite;
13
14	dl	1.2	public class AtomicIntegerFieldUpdaterTest extends JSR166TestCase {
15	dl	1.1	volatile int x = 0;
16	dl	1.4	int w;
17	dl	1.2	long z;
18	jsr166	1.12	public static void main(String[] args) {
19	jsr166	1.29	main(suite(), args);
20	dl	1.1	}
21			public static Test suite() {
22			return new TestSuite(AtomicIntegerFieldUpdaterTest.class);
23			}
24
25	jsr166	1.24	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> updaterFor(String fieldName) {
26			return AtomicIntegerFieldUpdater.newUpdater
27			(AtomicIntegerFieldUpdaterTest.class, fieldName);
28			}
29
30	dl	1.3	/**
31	dl	1.7	* Construction with non-existent field throws RuntimeException
32	dl	1.3	*/
33			public void testConstructor() {
34	jsr166	1.11	try {
35	jsr166	1.24	updaterFor("y");
36	dl	1.3	shouldThrow();
37	jsr166	1.25	} catch (RuntimeException success) {
38	jsr166	1.26	assertNotNull(success.getCause());
39	jsr166	1.25	}
40	dl	1.2	}
41
42	dl	1.3	/**
43	jsr166	1.25	* construction with field not of given type throws IllegalArgumentException
44	dl	1.3	*/
45			public void testConstructor2() {
46	jsr166	1.11	try {
47	jsr166	1.24	updaterFor("z");
48	dl	1.3	shouldThrow();
49	jsr166	1.25	} catch (IllegalArgumentException success) {}
50	dl	1.1	}
51
52	dl	1.3	/**
53	jsr166	1.25	* construction with non-volatile field throws IllegalArgumentException
54	dl	1.4	*/
55			public void testConstructor3() {
56	jsr166	1.11	try {
57	jsr166	1.24	updaterFor("w");
58	dl	1.4	shouldThrow();
59	jsr166	1.25	} catch (IllegalArgumentException success) {}
60	dl	1.4	}
61
62			/**
63	jsr166	1.18	* get returns the last value set or assigned
64	dl	1.3	*/
65			public void testGetSet() {
66	dl	1.8	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
67	jsr166	1.24	a = updaterFor("x");
68	dl	1.1	x = 1;
69	jsr166	1.22	assertEquals(1, a.get(this));
70			a.set(this, 2);
71			assertEquals(2, a.get(this));
72			a.set(this, -3);
73			assertEquals(-3, a.get(this));
74	dl	1.1	}
75	dl	1.9
76			/**
77	jsr166	1.18	* get returns the last value lazySet by same thread
78	dl	1.9	*/
79			public void testGetLazySet() {
80			AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
81	jsr166	1.24	a = updaterFor("x");
82	dl	1.9	x = 1;
83	jsr166	1.22	assertEquals(1, a.get(this));
84			a.lazySet(this, 2);
85			assertEquals(2, a.get(this));
86			a.lazySet(this, -3);
87			assertEquals(-3, a.get(this));
88	dl	1.9	}
89
90	dl	1.3	/**
91	dl	1.4	* compareAndSet succeeds in changing value if equal to expected else fails
92	dl	1.3	*/
93			public void testCompareAndSet() {
94	dl	1.8	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
95	jsr166	1.24	a = updaterFor("x");
96	dl	1.1	x = 1;
97	jsr166	1.22	assertTrue(a.compareAndSet(this, 1, 2));
98			assertTrue(a.compareAndSet(this, 2, -4));
99			assertEquals(-4, a.get(this));
100			assertFalse(a.compareAndSet(this, -5, 7));
101			assertEquals(-4, a.get(this));
102			assertTrue(a.compareAndSet(this, -4, 7));
103			assertEquals(7, a.get(this));
104	dl	1.1	}
105
106	dl	1.4	/**
107			* compareAndSet in one thread enables another waiting for value
108			* to succeed
109			*/
110	jsr166	1.13	public void testCompareAndSetInMultipleThreads() throws Exception {
111	dl	1.4	x = 1;
112	jsr166	1.24	final AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
113			a = updaterFor("x");
114	dl	1.4
115	jsr166	1.14	Thread t = new Thread(new CheckedRunnable() {
116			public void realRun() {
117			while (!a.compareAndSet(AtomicIntegerFieldUpdaterTest.this, 2, 3))
118			Thread.yield();
119			}});
120	jsr166	1.13
121			t.start();
122			assertTrue(a.compareAndSet(this, 1, 2));
123			t.join(LONG_DELAY_MS);
124			assertFalse(t.isAlive());
125	jsr166	1.23	assertEquals(3, a.get(this));
126	dl	1.4	}
127
128	dl	1.3	/**
129	dl	1.4	* repeated weakCompareAndSet succeeds in changing value when equal
130	jsr166	1.10	* to expected
131	dl	1.3	*/
132			public void testWeakCompareAndSet() {
133	dl	1.8	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
134	jsr166	1.24	a = updaterFor("x");
135	dl	1.1	x = 1;
136	jsr166	1.28	do {} while (!a.weakCompareAndSet(this, 1, 2));
137			do {} while (!a.weakCompareAndSet(this, 2, -4));
138	jsr166	1.22	assertEquals(-4, a.get(this));
139	jsr166	1.28	do {} while (!a.weakCompareAndSet(this, -4, 7));
140	jsr166	1.22	assertEquals(7, a.get(this));
141	dl	1.1	}
142
143	dl	1.3	/**
144	jsr166	1.18	* getAndSet returns previous value and sets to given value
145	dl	1.3	*/
146			public void testGetAndSet() {
147	dl	1.8	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
148	jsr166	1.24	a = updaterFor("x");
149	dl	1.1	x = 1;
150	jsr166	1.22	assertEquals(1, a.getAndSet(this, 0));
151			assertEquals(0, a.getAndSet(this, -10));
152			assertEquals(-10, a.getAndSet(this, 1));
153	dl	1.1	}
154
155	dl	1.3	/**
156	dl	1.4	* getAndAdd returns previous value and adds given value
157	dl	1.3	*/
158			public void testGetAndAdd() {
159	dl	1.8	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
160	jsr166	1.24	a = updaterFor("x");
161	dl	1.1	x = 1;
162	jsr166	1.22	assertEquals(1, a.getAndAdd(this, 2));
163			assertEquals(3, a.get(this));
164			assertEquals(3, a.getAndAdd(this, -4));
165			assertEquals(-1, a.get(this));
166	dl	1.1	}
167
168	dl	1.3	/**
169	dl	1.4	* getAndDecrement returns previous value and decrements
170	dl	1.3	*/
171			public void testGetAndDecrement() {
172	dl	1.8	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
173	jsr166	1.24	a = updaterFor("x");
174	dl	1.1	x = 1;
175	jsr166	1.22	assertEquals(1, a.getAndDecrement(this));
176			assertEquals(0, a.getAndDecrement(this));
177			assertEquals(-1, a.getAndDecrement(this));
178	dl	1.1	}
179
180	dl	1.3	/**
181	dl	1.4	* getAndIncrement returns previous value and increments
182	dl	1.3	*/
183			public void testGetAndIncrement() {
184	dl	1.8	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
185	jsr166	1.24	a = updaterFor("x");
186	dl	1.1	x = 1;
187	jsr166	1.22	assertEquals(1, a.getAndIncrement(this));
188			assertEquals(2, a.get(this));
189			a.set(this, -2);
190			assertEquals(-2, a.getAndIncrement(this));
191			assertEquals(-1, a.getAndIncrement(this));
192			assertEquals(0, a.getAndIncrement(this));
193			assertEquals(1, a.get(this));
194	dl	1.1	}
195
196	dl	1.3	/**
197	dl	1.4	* addAndGet adds given value to current, and returns current value
198	dl	1.3	*/
199			public void testAddAndGet() {
200	dl	1.8	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
201	jsr166	1.24	a = updaterFor("x");
202	dl	1.1	x = 1;
203	jsr166	1.22	assertEquals(3, a.addAndGet(this, 2));
204			assertEquals(3, a.get(this));
205			assertEquals(-1, a.addAndGet(this, -4));
206			assertEquals(-1, a.get(this));
207	dl	1.1	}
208
209	dl	1.3	/**
210	dl	1.4	* decrementAndGet decrements and returns current value
211	dl	1.3	*/
212			public void testDecrementAndGet() {
213	dl	1.8	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
214	jsr166	1.24	a = updaterFor("x");
215	dl	1.1	x = 1;
216	jsr166	1.22	assertEquals(0, a.decrementAndGet(this));
217			assertEquals(-1, a.decrementAndGet(this));
218			assertEquals(-2, a.decrementAndGet(this));
219			assertEquals(-2, a.get(this));
220	dl	1.1	}
221
222	dl	1.3	/**
223	dl	1.4	* incrementAndGet increments and returns current value
224	dl	1.3	*/
225			public void testIncrementAndGet() {
226	dl	1.8	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
227	jsr166	1.24	a = updaterFor("x");
228	dl	1.1	x = 1;
229	jsr166	1.22	assertEquals(2, a.incrementAndGet(this));
230			assertEquals(2, a.get(this));
231			a.set(this, -2);
232			assertEquals(-1, a.incrementAndGet(this));
233			assertEquals(0, a.incrementAndGet(this));
234			assertEquals(1, a.incrementAndGet(this));
235			assertEquals(1, a.get(this));
236	dl	1.1	}
237
238			}