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/licenses/publicdomain
 * Other contributors include Andrew Wright, Jeffrey Hayes,
 * Pat Fisher, Mike Judd.
 */

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

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

    /**
     * Construction with non-existent field throws RuntimeException
     */
    public void testConstructor() {
        try {
            AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest>
                a = AtomicIntegerFieldUpdater.newUpdater
                (AtomicIntegerFieldUpdaterTest.class, "y");
            shouldThrow();
        } catch (RuntimeException success) {}
    }

    /**
     * construction with field not of given type throws RuntimeException
     */
    public void testConstructor2() {
        try {
            AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest>
                a = AtomicIntegerFieldUpdater.newUpdater
                (AtomicIntegerFieldUpdaterTest.class, "z");
            shouldThrow();
        } catch (RuntimeException success) {}
    }

    /**
     * construction with non-volatile field throws RuntimeException
     */
    public void testConstructor3() {
        try {
            AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest>
                a = AtomicIntegerFieldUpdater.newUpdater
                (AtomicIntegerFieldUpdaterTest.class, "w");
            shouldThrow();
        } catch (RuntimeException success) {}
    }

    /**
     * get returns the last value set or assigned
     */
    public void testGetSet() {
        AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
        try {
            a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
        } catch (RuntimeException ok) {
            return;
        }
        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;
        try {
            a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
        } catch (RuntimeException ok) {
            return;
        }
        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;
        try {
            a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
        } catch (RuntimeException ok) {
            return;
        }
        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;
        try {
            a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
        } catch (RuntimeException ok) {
            return;
        }

        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(a.get(this), 3);
    }

    /**
     * repeated weakCompareAndSet succeeds in changing value when equal
     * to expected
     */
    public void testWeakCompareAndSet() {
        AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
        try {
            a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
        } catch (RuntimeException ok) {
            return;
        }
        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() {
        AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
        try {
            a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
        } catch (RuntimeException ok) {
            return;
        }
        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;
        try {
            a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
        } catch (RuntimeException ok) {
            return;
        }
        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;
        try {
            a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
        } catch (RuntimeException ok) {
            return;
        }
        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;
        try {
            a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
        } catch (RuntimeException ok) {
            return;
        }
        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;
        try {
            a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
        } catch (RuntimeException ok) {
            return;
        }
        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;
        try {
            a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
        } catch (RuntimeException ok) {
            return;
        }
        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;
        try {
            a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
        } catch (RuntimeException ok) {
            return;
        }
        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:	1.18
Committed:	Sat Oct 9 19:30:34 2010 UTC (13 years, 7 months ago) by jsr166
Branch:	MAIN
Changes since 1.17:	+3 -3 lines
Log Message:	whitespace
#	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			* http://creativecommons.org/licenses/publicdomain
5	jsr166	1.10	* Other contributors include Andrew Wright, Jeffrey Hayes,
6			* Pat Fisher, Mike Judd.
7	dl	1.1	*/
8
9			import java.util.concurrent.atomic.*;
10			import junit.framework.*;
11			import java.util.*;
12
13	dl	1.2	public class AtomicIntegerFieldUpdaterTest extends JSR166TestCase {
14	dl	1.1	volatile int x = 0;
15	dl	1.4	int w;
16	dl	1.2	long z;
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(AtomicIntegerFieldUpdaterTest.class);
22			}
23
24	dl	1.3	/**
25	dl	1.7	* Construction with non-existent field throws RuntimeException
26	dl	1.3	*/
27			public void testConstructor() {
28	jsr166	1.11	try {
29	jsr166	1.10	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest>
30	dl	1.1	a = AtomicIntegerFieldUpdater.newUpdater
31	dl	1.5	(AtomicIntegerFieldUpdaterTest.class, "y");
32	dl	1.3	shouldThrow();
33	jsr166	1.16	} catch (RuntimeException success) {}
34	dl	1.2	}
35
36	dl	1.3	/**
37	dl	1.4	* construction with field not of given type throws RuntimeException
38	dl	1.3	*/
39			public void testConstructor2() {
40	jsr166	1.11	try {
41	jsr166	1.10	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest>
42	dl	1.2	a = AtomicIntegerFieldUpdater.newUpdater
43	dl	1.5	(AtomicIntegerFieldUpdaterTest.class, "z");
44	dl	1.3	shouldThrow();
45	jsr166	1.16	} catch (RuntimeException success) {}
46	dl	1.1	}
47
48	dl	1.3	/**
49	dl	1.4	* construction with non-volatile field throws RuntimeException
50			*/
51			public void testConstructor3() {
52	jsr166	1.11	try {
53	jsr166	1.10	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest>
54	dl	1.4	a = AtomicIntegerFieldUpdater.newUpdater
55	dl	1.5	(AtomicIntegerFieldUpdaterTest.class, "w");
56	dl	1.4	shouldThrow();
57	jsr166	1.16	} catch (RuntimeException success) {}
58	dl	1.4	}
59
60			/**
61	jsr166	1.18	* get returns the last value set or assigned
62	dl	1.3	*/
63			public void testGetSet() {
64	dl	1.8	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
65			try {
66			a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
67			} catch (RuntimeException ok) {
68			return;
69			}
70	dl	1.1	x = 1;
71	jsr166	1.15	assertEquals(1,a.get(this));
72			a.set(this,2);
73			assertEquals(2,a.get(this));
74			a.set(this,-3);
75			assertEquals(-3,a.get(this));
76	dl	1.1	}
77	dl	1.9
78			/**
79	jsr166	1.18	* get returns the last value lazySet by same thread
80	dl	1.9	*/
81			public void testGetLazySet() {
82			AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
83			try {
84			a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
85			} catch (RuntimeException ok) {
86			return;
87			}
88			x = 1;
89	jsr166	1.15	assertEquals(1,a.get(this));
90			a.lazySet(this,2);
91			assertEquals(2,a.get(this));
92			a.lazySet(this,-3);
93			assertEquals(-3,a.get(this));
94	dl	1.9	}
95
96	dl	1.3	/**
97	dl	1.4	* compareAndSet succeeds in changing value if equal to expected else fails
98	dl	1.3	*/
99			public void testCompareAndSet() {
100	dl	1.8	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
101			try {
102			a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
103			} catch (RuntimeException ok) {
104			return;
105			}
106	dl	1.1	x = 1;
107	jsr166	1.15	assertTrue(a.compareAndSet(this,1,2));
108			assertTrue(a.compareAndSet(this,2,-4));
109			assertEquals(-4,a.get(this));
110			assertFalse(a.compareAndSet(this,-5,7));
111	jsr166	1.17	assertEquals(-4,a.get(this));
112	jsr166	1.15	assertTrue(a.compareAndSet(this,-4,7));
113			assertEquals(7,a.get(this));
114	dl	1.1	}
115
116	dl	1.4
117			/**
118			* compareAndSet in one thread enables another waiting for value
119			* to succeed
120			*/
121	jsr166	1.13	public void testCompareAndSetInMultipleThreads() throws Exception {
122	dl	1.4	x = 1;
123	dl	1.8	final AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest>a;
124			try {
125			a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
126			} catch (RuntimeException ok) {
127			return;
128			}
129	dl	1.4
130	jsr166	1.14	Thread t = new Thread(new CheckedRunnable() {
131			public void realRun() {
132			while (!a.compareAndSet(AtomicIntegerFieldUpdaterTest.this, 2, 3))
133			Thread.yield();
134			}});
135	jsr166	1.13
136			t.start();
137			assertTrue(a.compareAndSet(this, 1, 2));
138			t.join(LONG_DELAY_MS);
139			assertFalse(t.isAlive());
140			assertEquals(a.get(this), 3);
141	dl	1.4	}
142
143	dl	1.3	/**
144	dl	1.4	* repeated weakCompareAndSet succeeds in changing value when equal
145	jsr166	1.10	* to expected
146	dl	1.3	*/
147			public void testWeakCompareAndSet() {
148	dl	1.8	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
149			try {
150			a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
151			} catch (RuntimeException ok) {
152			return;
153			}
154	dl	1.1	x = 1;
155	jsr166	1.15	while (!a.weakCompareAndSet(this,1,2));
156			while (!a.weakCompareAndSet(this,2,-4));
157			assertEquals(-4,a.get(this));
158			while (!a.weakCompareAndSet(this,-4,7));
159			assertEquals(7,a.get(this));
160	dl	1.1	}
161
162	dl	1.3	/**
163	jsr166	1.18	* getAndSet returns previous value and sets to given value
164	dl	1.3	*/
165			public void testGetAndSet() {
166	dl	1.8	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
167			try {
168			a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
169			} catch (RuntimeException ok) {
170			return;
171			}
172	dl	1.1	x = 1;
173	jsr166	1.15	assertEquals(1,a.getAndSet(this, 0));
174			assertEquals(0,a.getAndSet(this,-10));
175			assertEquals(-10,a.getAndSet(this,1));
176	dl	1.1	}
177
178	dl	1.3	/**
179	dl	1.4	* getAndAdd returns previous value and adds given value
180	dl	1.3	*/
181			public void testGetAndAdd() {
182	dl	1.8	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
183			try {
184			a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
185			} catch (RuntimeException ok) {
186			return;
187			}
188	dl	1.1	x = 1;
189	jsr166	1.15	assertEquals(1,a.getAndAdd(this,2));
190			assertEquals(3,a.get(this));
191			assertEquals(3,a.getAndAdd(this,-4));
192			assertEquals(-1,a.get(this));
193	dl	1.1	}
194
195	dl	1.3	/**
196	dl	1.4	* getAndDecrement returns previous value and decrements
197	dl	1.3	*/
198			public void testGetAndDecrement() {
199	dl	1.8	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
200			try {
201			a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
202			} catch (RuntimeException ok) {
203			return;
204			}
205	dl	1.1	x = 1;
206	jsr166	1.15	assertEquals(1,a.getAndDecrement(this));
207			assertEquals(0,a.getAndDecrement(this));
208			assertEquals(-1,a.getAndDecrement(this));
209	dl	1.1	}
210
211	dl	1.3	/**
212	dl	1.4	* getAndIncrement returns previous value and increments
213	dl	1.3	*/
214			public void testGetAndIncrement() {
215	dl	1.8	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
216			try {
217			a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
218			} catch (RuntimeException ok) {
219			return;
220			}
221	dl	1.1	x = 1;
222	jsr166	1.15	assertEquals(1,a.getAndIncrement(this));
223			assertEquals(2,a.get(this));
224			a.set(this,-2);
225			assertEquals(-2,a.getAndIncrement(this));
226			assertEquals(-1,a.getAndIncrement(this));
227			assertEquals(0,a.getAndIncrement(this));
228			assertEquals(1,a.get(this));
229	dl	1.1	}
230
231	dl	1.3	/**
232	dl	1.4	* addAndGet adds given value to current, and returns current value
233	dl	1.3	*/
234			public void testAddAndGet() {
235	dl	1.8	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
236			try {
237			a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
238			} catch (RuntimeException ok) {
239			return;
240			}
241	dl	1.1	x = 1;
242	jsr166	1.15	assertEquals(3,a.addAndGet(this,2));
243			assertEquals(3,a.get(this));
244			assertEquals(-1,a.addAndGet(this,-4));
245			assertEquals(-1,a.get(this));
246	dl	1.1	}
247
248	dl	1.3	/**
249	dl	1.4	* decrementAndGet decrements and returns current value
250	dl	1.3	*/
251			public void testDecrementAndGet() {
252	dl	1.8	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
253			try {
254			a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
255			} catch (RuntimeException ok) {
256			return;
257			}
258	dl	1.1	x = 1;
259	jsr166	1.15	assertEquals(0,a.decrementAndGet(this));
260			assertEquals(-1,a.decrementAndGet(this));
261			assertEquals(-2,a.decrementAndGet(this));
262			assertEquals(-2,a.get(this));
263	dl	1.1	}
264
265	dl	1.3	/**
266	dl	1.4	* incrementAndGet increments and returns current value
267	dl	1.3	*/
268			public void testIncrementAndGet() {
269	dl	1.8	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
270			try {
271			a = AtomicIntegerFieldUpdater.newUpdater(AtomicIntegerFieldUpdaterTest.class, "x");
272			} catch (RuntimeException ok) {
273			return;
274			}
275	dl	1.1	x = 1;
276	jsr166	1.15	assertEquals(2,a.incrementAndGet(this));
277			assertEquals(2,a.get(this));
278			a.set(this,-2);
279			assertEquals(-1,a.incrementAndGet(this));
280			assertEquals(0,a.incrementAndGet(this));
281			assertEquals(1,a.incrementAndGet(this));
282			assertEquals(1,a.get(this));
283	dl	1.1	}
284
285			}