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;
    protected volatile int protectedField;
    private volatile int privateField;
    int w;
    float 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) {}
    }

    /**
     * construction using private field from subclass throws RuntimeException
     */
    public void testPrivateFieldInSubclass() {
        new NonNestmates.AtomicIntegerFieldUpdaterTestSubclass()
            .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() {
        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 succeeds in changing protected field value if
     * equal to expected else fails
     */
    public void testCompareAndSetProtected() {
        AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> 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() {
        new NonNestmates.AtomicIntegerFieldUpdaterTestSubclass()
            .checkCompareAndSetProtectedSub();
    }

    /**
     * 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:	1.33
Committed:	Wed Sep 20 00:59:17 2017 UTC (6 years, 6 months ago) by jsr166
Branch:	MAIN
CVS Tags:	HEAD
Changes since 1.32:	+2 -3 lines
Log Message:	8187607: [Testbug] Atomic*FieldUpdaterTest.checkPrivateAccess uses nested classes
#	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.AtomicIntegerFieldUpdater;
10
11	import junit.framework.Test;
12	import junit.framework.TestSuite;
13
14	public class AtomicIntegerFieldUpdaterTest extends JSR166TestCase {
15	volatile int x = 0;
16	protected volatile int protectedField;
17	private volatile int privateField;
18	int 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(AtomicIntegerFieldUpdaterTest.class);
25	}
26
27	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> updaterFor(String fieldName) {
28	return AtomicIntegerFieldUpdater.newUpdater
29	(AtomicIntegerFieldUpdaterTest.class, fieldName);
30	}
31
32	/**
33	* Construction with non-existent field throws RuntimeException
34	*/
35	public void testConstructor() {
36	try {
37	updaterFor("y");
38	shouldThrow();
39	} catch (RuntimeException success) {
40	assertNotNull(success.getCause());
41	}
42	}
43
44	/**
45	* construction with field not of given type throws IllegalArgumentException
46	*/
47	public void testConstructor2() {
48	try {
49	updaterFor("z");
50	shouldThrow();
51	} catch (IllegalArgumentException success) {}
52	}
53
54	/**
55	* construction with non-volatile field throws IllegalArgumentException
56	*/
57	public void testConstructor3() {
58	try {
59	updaterFor("w");
60	shouldThrow();
61	} catch (IllegalArgumentException success) {}
62	}
63
64	/**
65	* construction using private field from subclass throws RuntimeException
66	*/
67	public void testPrivateFieldInSubclass() {
68	new NonNestmates.AtomicIntegerFieldUpdaterTestSubclass()
69	.checkPrivateAccess();
70	}
71
72	/**
73	* construction from unrelated class; package access is allowed,
74	* private access is not
75	*/
76	public void testUnrelatedClassAccess() {
77	new NonNestmates().checkPackageAccess(this);
78	new NonNestmates().checkPrivateAccess(this);
79	}
80
81	/**
82	* get returns the last value set or assigned
83	*/
84	public void testGetSet() {
85	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
86	a = updaterFor("x");
87	x = 1;
88	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	}
94
95	/**
96	* get returns the last value lazySet by same thread
97	*/
98	public void testGetLazySet() {
99	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
100	a = updaterFor("x");
101	x = 1;
102	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	}
108
109	/**
110	* compareAndSet succeeds in changing value if equal to expected else fails
111	*/
112	public void testCompareAndSet() {
113	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
114	a = updaterFor("x");
115	x = 1;
116	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	}
124
125	/**
126	* compareAndSet succeeds in changing protected field value if
127	* equal to expected else fails
128	*/
129	public void testCompareAndSetProtected() {
130	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> 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	new NonNestmates.AtomicIntegerFieldUpdaterTestSubclass()
148	.checkCompareAndSetProtectedSub();
149	}
150
151	/**
152	* compareAndSet in one thread enables another waiting for value
153	* to succeed
154	*/
155	public void testCompareAndSetInMultipleThreads() throws Exception {
156	x = 1;
157	final AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
158	a = updaterFor("x");
159
160	Thread t = new Thread(new CheckedRunnable() {
161	public void realRun() {
162	while (!a.compareAndSet(AtomicIntegerFieldUpdaterTest.this, 2, 3))
163	Thread.yield();
164	}});
165
166	t.start();
167	assertTrue(a.compareAndSet(this, 1, 2));
168	t.join(LONG_DELAY_MS);
169	assertFalse(t.isAlive());
170	assertEquals(3, a.get(this));
171	}
172
173	/**
174	* repeated weakCompareAndSet succeeds in changing value when equal
175	* to expected
176	*/
177	public void testWeakCompareAndSet() {
178	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
179	a = updaterFor("x");
180	x = 1;
181	do {} while (!a.weakCompareAndSet(this, 1, 2));
182	do {} while (!a.weakCompareAndSet(this, 2, -4));
183	assertEquals(-4, a.get(this));
184	do {} while (!a.weakCompareAndSet(this, -4, 7));
185	assertEquals(7, a.get(this));
186	}
187
188	/**
189	* getAndSet returns previous value and sets to given value
190	*/
191	public void testGetAndSet() {
192	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
193	a = updaterFor("x");
194	x = 1;
195	assertEquals(1, a.getAndSet(this, 0));
196	assertEquals(0, a.getAndSet(this, -10));
197	assertEquals(-10, a.getAndSet(this, 1));
198	}
199
200	/**
201	* getAndAdd returns previous value and adds given value
202	*/
203	public void testGetAndAdd() {
204	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
205	a = updaterFor("x");
206	x = 1;
207	assertEquals(1, a.getAndAdd(this, 2));
208	assertEquals(3, a.get(this));
209	assertEquals(3, a.getAndAdd(this, -4));
210	assertEquals(-1, a.get(this));
211	}
212
213	/**
214	* getAndDecrement returns previous value and decrements
215	*/
216	public void testGetAndDecrement() {
217	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
218	a = updaterFor("x");
219	x = 1;
220	assertEquals(1, a.getAndDecrement(this));
221	assertEquals(0, a.getAndDecrement(this));
222	assertEquals(-1, a.getAndDecrement(this));
223	}
224
225	/**
226	* getAndIncrement returns previous value and increments
227	*/
228	public void testGetAndIncrement() {
229	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
230	a = updaterFor("x");
231	x = 1;
232	assertEquals(1, a.getAndIncrement(this));
233	assertEquals(2, a.get(this));
234	a.set(this, -2);
235	assertEquals(-2, a.getAndIncrement(this));
236	assertEquals(-1, a.getAndIncrement(this));
237	assertEquals(0, a.getAndIncrement(this));
238	assertEquals(1, a.get(this));
239	}
240
241	/**
242	* addAndGet adds given value to current, and returns current value
243	*/
244	public void testAddAndGet() {
245	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
246	a = updaterFor("x");
247	x = 1;
248	assertEquals(3, a.addAndGet(this, 2));
249	assertEquals(3, a.get(this));
250	assertEquals(-1, a.addAndGet(this, -4));
251	assertEquals(-1, a.get(this));
252	}
253
254	/**
255	* decrementAndGet decrements and returns current value
256	*/
257	public void testDecrementAndGet() {
258	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
259	a = updaterFor("x");
260	x = 1;
261	assertEquals(0, a.decrementAndGet(this));
262	assertEquals(-1, a.decrementAndGet(this));
263	assertEquals(-2, a.decrementAndGet(this));
264	assertEquals(-2, a.get(this));
265	}
266
267	/**
268	* incrementAndGet increments and returns current value
269	*/
270	public void testIncrementAndGet() {
271	AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a;
272	a = updaterFor("x");
273	x = 1;
274	assertEquals(2, a.incrementAndGet(this));
275	assertEquals(2, a.get(this));
276	a.set(this, -2);
277	assertEquals(-1, a.incrementAndGet(this));
278	assertEquals(0, a.incrementAndGet(this));
279	assertEquals(1, a.incrementAndGet(this));
280	assertEquals(1, a.get(this));
281	}
282
283	}