test/tck/AtomicLongArrayTest.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.Arrays;
import java.util.concurrent.atomic.AtomicLongArray;

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

public class AtomicLongArrayTest extends JSR166TestCase {
    public static void main(String[] args) {
        main(suite(), args);
    }
    public static Test suite() {
        return new TestSuite(AtomicLongArrayTest.class);
    }

    /**
     * constructor creates array of given size with all elements zero
     */
    public void testConstructor() {
        AtomicLongArray aa = new AtomicLongArray(SIZE);
        for (int i = 0; i < SIZE; i++)
            assertEquals(0, aa.get(i));
    }

    /**
     * constructor with null array throws NPE
     */
    public void testConstructor2NPE() {
        try {
            long[] a = null;
            new AtomicLongArray(a);
            shouldThrow();
        } catch (NullPointerException success) {}
    }

    /**
     * constructor with array is of same size and has all elements
     */
    public void testConstructor2() {
        long[] a = { 17L, 3L, -42L, 99L, -7L };
        AtomicLongArray aa = new AtomicLongArray(a);
        assertEquals(a.length, aa.length());
        for (int i = 0; i < a.length; i++)
            assertEquals(a[i], aa.get(i));
    }

    /**
     * get and set for out of bound indices throw IndexOutOfBoundsException
     */
    @SuppressWarnings("deprecation")
    public void testIndexing() {
        AtomicLongArray aa = new AtomicLongArray(SIZE);
        for (int index : new int[] { -1, SIZE }) {
            try {
                aa.get(index);
                shouldThrow();
            } catch (IndexOutOfBoundsException success) {}
            try {
                aa.set(index, 1);
                shouldThrow();
            } catch (IndexOutOfBoundsException success) {}
            try {
                aa.lazySet(index, 1);
                shouldThrow();
            } catch (IndexOutOfBoundsException success) {}
            try {
                aa.compareAndSet(index, 1, 2);
                shouldThrow();
            } catch (IndexOutOfBoundsException success) {}
            try {
                aa.weakCompareAndSet(index, 1, 2);
                shouldThrow();
            } catch (IndexOutOfBoundsException success) {}
            try {
                aa.getAndAdd(index, 1);
                shouldThrow();
            } catch (IndexOutOfBoundsException success) {}
            try {
                aa.addAndGet(index, 1);
                shouldThrow();
            } catch (IndexOutOfBoundsException success) {}
        }
    }

    /**
     * get returns the last value set at index
     */
    public void testGetSet() {
        AtomicLongArray aa = new AtomicLongArray(SIZE);
        for (int i = 0; i < SIZE; i++) {
            aa.set(i, 1);
            assertEquals(1, aa.get(i));
            aa.set(i, 2);
            assertEquals(2, aa.get(i));
            aa.set(i, -3);
            assertEquals(-3, aa.get(i));
        }
    }

    /**
     * get returns the last value lazySet at index by same thread
     */
    public void testGetLazySet() {
        AtomicLongArray aa = new AtomicLongArray(SIZE);
        for (int i = 0; i < SIZE; i++) {
            aa.lazySet(i, 1);
            assertEquals(1, aa.get(i));
            aa.lazySet(i, 2);
            assertEquals(2, aa.get(i));
            aa.lazySet(i, -3);
            assertEquals(-3, aa.get(i));
        }
    }

    /**
     * compareAndSet succeeds in changing value if equal to expected else fails
     */
    public void testCompareAndSet() {
        AtomicLongArray aa = new AtomicLongArray(SIZE);
        for (int i = 0; i < SIZE; i++) {
            aa.set(i, 1);
            assertTrue(aa.compareAndSet(i, 1, 2));
            assertTrue(aa.compareAndSet(i, 2, -4));
            assertEquals(-4, aa.get(i));
            assertFalse(aa.compareAndSet(i, -5, 7));
            assertEquals(-4, aa.get(i));
            assertTrue(aa.compareAndSet(i, -4, 7));
            assertEquals(7, aa.get(i));
        }
    }

    /**
     * compareAndSet in one thread enables another waiting for value
     * to succeed
     */
    public void testCompareAndSetInMultipleThreads() throws InterruptedException {
        final AtomicLongArray a = new AtomicLongArray(1);
        a.set(0, 1);
        Thread t = new Thread(new CheckedRunnable() {
            public void realRun() {
                while (!a.compareAndSet(0, 2, 3))
                    Thread.yield();
            }});

        t.start();
        assertTrue(a.compareAndSet(0, 1, 2));
        t.join(LONG_DELAY_MS);
        assertFalse(t.isAlive());
        assertEquals(3, a.get(0));
    }

    /**
     * repeated weakCompareAndSet succeeds in changing value when equal
     * to expected
     */
    @SuppressWarnings("deprecation")
    public void testWeakCompareAndSet() {
        AtomicLongArray aa = new AtomicLongArray(SIZE);
        for (int i = 0; i < SIZE; i++) {
            aa.set(i, 1);
            do {} while (!aa.weakCompareAndSet(i, 1, 2));
            do {} while (!aa.weakCompareAndSet(i, 2, -4));
            assertEquals(-4, aa.get(i));
            do {} while (!aa.weakCompareAndSet(i, -4, 7));
            assertEquals(7, aa.get(i));
        }
    }

    /**
     * getAndSet returns previous value and sets to given value at given index
     */
    public void testGetAndSet() {
        AtomicLongArray aa = new AtomicLongArray(SIZE);
        for (int i = 0; i < SIZE; i++) {
            aa.set(i, 1);
            assertEquals(1, aa.getAndSet(i, 0));
            assertEquals(0, aa.getAndSet(i, -10));
            assertEquals(-10, aa.getAndSet(i, 1));
        }
    }

    /**
     * getAndAdd returns previous value and adds given value
     */
    public void testGetAndAdd() {
        AtomicLongArray aa = new AtomicLongArray(SIZE);
        for (int i = 0; i < SIZE; i++) {
            aa.set(i, 1);
            assertEquals(1, aa.getAndAdd(i, 2));
            assertEquals(3, aa.get(i));
            assertEquals(3, aa.getAndAdd(i, -4));
            assertEquals(-1, aa.get(i));
        }
    }

    /**
     * getAndDecrement returns previous value and decrements
     */
    public void testGetAndDecrement() {
        AtomicLongArray aa = new AtomicLongArray(SIZE);
        for (int i = 0; i < SIZE; i++) {
            aa.set(i, 1);
            assertEquals(1, aa.getAndDecrement(i));
            assertEquals(0, aa.getAndDecrement(i));
            assertEquals(-1, aa.getAndDecrement(i));
        }
    }

    /**
     * getAndIncrement returns previous value and increments
     */
    public void testGetAndIncrement() {
        AtomicLongArray aa = new AtomicLongArray(SIZE);
        for (int i = 0; i < SIZE; i++) {
            aa.set(i, 1);
            assertEquals(1, aa.getAndIncrement(i));
            assertEquals(2, aa.get(i));
            aa.set(i, -2);
            assertEquals(-2, aa.getAndIncrement(i));
            assertEquals(-1, aa.getAndIncrement(i));
            assertEquals(0, aa.getAndIncrement(i));
            assertEquals(1, aa.get(i));
        }
    }

    /**
     * addAndGet adds given value to current, and returns current value
     */
    public void testAddAndGet() {
        AtomicLongArray aa = new AtomicLongArray(SIZE);
        for (int i = 0; i < SIZE; i++) {
            aa.set(i, 1);
            assertEquals(3, aa.addAndGet(i, 2));
            assertEquals(3, aa.get(i));
            assertEquals(-1, aa.addAndGet(i, -4));
            assertEquals(-1, aa.get(i));
        }
    }

    /**
     * decrementAndGet decrements and returns current value
     */
    public void testDecrementAndGet() {
        AtomicLongArray aa = new AtomicLongArray(SIZE);
        for (int i = 0; i < SIZE; i++) {
            aa.set(i, 1);
            assertEquals(0, aa.decrementAndGet(i));
            assertEquals(-1, aa.decrementAndGet(i));
            assertEquals(-2, aa.decrementAndGet(i));
            assertEquals(-2, aa.get(i));
        }
    }

    /**
     * incrementAndGet increments and returns current value
     */
    public void testIncrementAndGet() {
        AtomicLongArray aa = new AtomicLongArray(SIZE);
        for (int i = 0; i < SIZE; i++) {
            aa.set(i, 1);
            assertEquals(2, aa.incrementAndGet(i));
            assertEquals(2, aa.get(i));
            aa.set(i, -2);
            assertEquals(-1, aa.incrementAndGet(i));
            assertEquals(0, aa.incrementAndGet(i));
            assertEquals(1, aa.incrementAndGet(i));
            assertEquals(1, aa.get(i));
        }
    }

    class Counter extends CheckedRunnable {
        final AtomicLongArray aa;
        int decs;
        Counter(AtomicLongArray a) { aa = a; }
        public void realRun() {
            for (;;) {
                boolean done = true;
                for (int i = 0; i < aa.length(); i++) {
                    long v = aa.get(i);
                    assertTrue(v >= 0);
                    if (v != 0) {
                        done = false;
                        if (aa.compareAndSet(i, v, v - 1))
                            decs++;
                    }
                }
                if (done)
                    break;
            }
        }
    }

    /**
     * Multiple threads using same array of counters successfully
     * update a number of times equal to total count
     */
    public void testCountingInMultipleThreads() throws InterruptedException {
        final AtomicLongArray aa = new AtomicLongArray(SIZE);
        long countdown = 10000;
        for (int i = 0; i < SIZE; i++)
            aa.set(i, countdown);
        Counter c1 = new Counter(aa);
        Counter c2 = new Counter(aa);
        Thread t1 = newStartedThread(c1);
        Thread t2 = newStartedThread(c2);
        t1.join();
        t2.join();
        assertEquals(c1.decs + c2.decs, SIZE * countdown);
    }

    /**
     * a deserialized/reserialized array holds same values in same order
     */
    public void testSerialization() throws Exception {
        AtomicLongArray x = new AtomicLongArray(SIZE);
        for (int i = 0; i < SIZE; i++)
            x.set(i, -i);
        AtomicLongArray y = serialClone(x);
        assertNotSame(x, y);
        assertEquals(x.length(), y.length());
        for (int i = 0; i < SIZE; i++) {
            assertEquals(x.get(i), y.get(i));
        }
    }

    /**
     * toString returns current value.
     */
    public void testToString() {
        long[] a = { 17, 3, -42, 99, -7 };
        AtomicLongArray aa = new AtomicLongArray(a);
        assertEquals(Arrays.toString(a), aa.toString());
    }

}
Revision:	1.38
Committed:	Tue Jan 26 13:33:05 2021 UTC (3 years, 3 months ago) by dl
Branch:	MAIN
CVS Tags:	HEAD
Changes since 1.37:	+2 -0 lines
Log Message:	Replace Integer with Item class
#	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.Arrays;
10			import java.util.concurrent.atomic.AtomicLongArray;
11	dl	1.1
12	jsr166	1.28	import junit.framework.Test;
13			import junit.framework.TestSuite;
14
15	dl	1.3	public class AtomicLongArrayTest extends JSR166TestCase {
16	jsr166	1.16	public static void main(String[] args) {
17	jsr166	1.31	main(suite(), args);
18	dl	1.1	}
19			public static Test suite() {
20			return new TestSuite(AtomicLongArrayTest.class);
21			}
22
23	dl	1.4	/**
24	dl	1.5	* constructor creates array of given size with all elements zero
25	dl	1.4	*/
26	jsr166	1.12	public void testConstructor() {
27	jsr166	1.25	AtomicLongArray aa = new AtomicLongArray(SIZE);
28			for (int i = 0; i < SIZE; i++)
29			assertEquals(0, aa.get(i));
30	dl	1.1	}
31
32	dl	1.4	/**
33	dl	1.7	* constructor with null array throws NPE
34			*/
35			public void testConstructor2NPE() {
36			try {
37			long[] a = null;
38	jsr166	1.30	new AtomicLongArray(a);
39	jsr166	1.13	shouldThrow();
40			} catch (NullPointerException success) {}
41	dl	1.7	}
42
43			/**
44			* constructor with array is of same size and has all elements
45			*/
46			public void testConstructor2() {
47	jsr166	1.22	long[] a = { 17L, 3L, -42L, 99L, -7L };
48	jsr166	1.25	AtomicLongArray aa = new AtomicLongArray(a);
49			assertEquals(a.length, aa.length());
50			for (int i = 0; i < a.length; i++)
51			assertEquals(a[i], aa.get(i));
52	dl	1.7	}
53
54			/**
55	dl	1.5	* get and set for out of bound indices throw IndexOutOfBoundsException
56			*/
57	dl	1.38	@SuppressWarnings("deprecation")
58	jsr166	1.12	public void testIndexing() {
59	jsr166	1.25	AtomicLongArray aa = new AtomicLongArray(SIZE);
60			for (int index : new int[] { -1, SIZE }) {
61			try {
62			aa.get(index);
63			shouldThrow();
64			} catch (IndexOutOfBoundsException success) {}
65			try {
66			aa.set(index, 1);
67			shouldThrow();
68			} catch (IndexOutOfBoundsException success) {}
69			try {
70			aa.lazySet(index, 1);
71			shouldThrow();
72			} catch (IndexOutOfBoundsException success) {}
73			try {
74			aa.compareAndSet(index, 1, 2);
75			shouldThrow();
76			} catch (IndexOutOfBoundsException success) {}
77			try {
78			aa.weakCompareAndSet(index, 1, 2);
79			shouldThrow();
80			} catch (IndexOutOfBoundsException success) {}
81			try {
82			aa.getAndAdd(index, 1);
83			shouldThrow();
84			} catch (IndexOutOfBoundsException success) {}
85			try {
86			aa.addAndGet(index, 1);
87			shouldThrow();
88			} catch (IndexOutOfBoundsException success) {}
89	dl	1.5	}
90			}
91
92			/**
93			* get returns the last value set at index
94	dl	1.4	*/
95	jsr166	1.12	public void testGetSet() {
96	jsr166	1.25	AtomicLongArray aa = new AtomicLongArray(SIZE);
97			for (int i = 0; i < SIZE; i++) {
98			aa.set(i, 1);
99			assertEquals(1, aa.get(i));
100			aa.set(i, 2);
101			assertEquals(2, aa.get(i));
102			aa.set(i, -3);
103			assertEquals(-3, aa.get(i));
104	dl	1.1	}
105			}
106
107	dl	1.4	/**
108	dl	1.9	* get returns the last value lazySet at index by same thread
109			*/
110	jsr166	1.12	public void testGetLazySet() {
111	jsr166	1.25	AtomicLongArray aa = new AtomicLongArray(SIZE);
112			for (int i = 0; i < SIZE; i++) {
113			aa.lazySet(i, 1);
114			assertEquals(1, aa.get(i));
115			aa.lazySet(i, 2);
116			assertEquals(2, aa.get(i));
117			aa.lazySet(i, -3);
118			assertEquals(-3, aa.get(i));
119	dl	1.9	}
120			}
121
122			/**
123	dl	1.5	* compareAndSet succeeds in changing value if equal to expected else fails
124	dl	1.4	*/
125	jsr166	1.12	public void testCompareAndSet() {
126	jsr166	1.25	AtomicLongArray aa = new AtomicLongArray(SIZE);
127			for (int i = 0; i < SIZE; i++) {
128			aa.set(i, 1);
129			assertTrue(aa.compareAndSet(i, 1, 2));
130			assertTrue(aa.compareAndSet(i, 2, -4));
131			assertEquals(-4, aa.get(i));
132			assertFalse(aa.compareAndSet(i, -5, 7));
133			assertEquals(-4, aa.get(i));
134			assertTrue(aa.compareAndSet(i, -4, 7));
135			assertEquals(7, aa.get(i));
136	dl	1.1	}
137			}
138
139	dl	1.4	/**
140	dl	1.5	* compareAndSet in one thread enables another waiting for value
141			* to succeed
142			*/
143	jsr166	1.13	public void testCompareAndSetInMultipleThreads() throws InterruptedException {
144	dl	1.5	final AtomicLongArray a = new AtomicLongArray(1);
145			a.set(0, 1);
146	jsr166	1.14	Thread t = new Thread(new CheckedRunnable() {
147			public void realRun() {
148			while (!a.compareAndSet(0, 2, 3))
149			Thread.yield();
150			}});
151	jsr166	1.13
152			t.start();
153			assertTrue(a.compareAndSet(0, 1, 2));
154			t.join(LONG_DELAY_MS);
155			assertFalse(t.isAlive());
156	jsr166	1.24	assertEquals(3, a.get(0));
157	dl	1.5	}
158
159			/**
160			* repeated weakCompareAndSet succeeds in changing value when equal
161	jsr166	1.10	* to expected
162	dl	1.4	*/
163	dl	1.38	@SuppressWarnings("deprecation")
164	jsr166	1.12	public void testWeakCompareAndSet() {
165	jsr166	1.25	AtomicLongArray aa = new AtomicLongArray(SIZE);
166			for (int i = 0; i < SIZE; i++) {
167			aa.set(i, 1);
168	jsr166	1.29	do {} while (!aa.weakCompareAndSet(i, 1, 2));
169			do {} while (!aa.weakCompareAndSet(i, 2, -4));
170	jsr166	1.25	assertEquals(-4, aa.get(i));
171	jsr166	1.29	do {} while (!aa.weakCompareAndSet(i, -4, 7));
172	jsr166	1.25	assertEquals(7, aa.get(i));
173	dl	1.1	}
174			}
175
176	dl	1.4	/**
177	jsr166	1.18	* getAndSet returns previous value and sets to given value at given index
178	dl	1.4	*/
179	jsr166	1.12	public void testGetAndSet() {
180	jsr166	1.25	AtomicLongArray aa = new AtomicLongArray(SIZE);
181			for (int i = 0; i < SIZE; i++) {
182			aa.set(i, 1);
183			assertEquals(1, aa.getAndSet(i, 0));
184			assertEquals(0, aa.getAndSet(i, -10));
185			assertEquals(-10, aa.getAndSet(i, 1));
186	dl	1.1	}
187			}
188
189	dl	1.4	/**
190	jsr166	1.18	* getAndAdd returns previous value and adds given value
191	dl	1.4	*/
192	jsr166	1.12	public void testGetAndAdd() {
193	jsr166	1.25	AtomicLongArray aa = new AtomicLongArray(SIZE);
194			for (int i = 0; i < SIZE; i++) {
195			aa.set(i, 1);
196			assertEquals(1, aa.getAndAdd(i, 2));
197			assertEquals(3, aa.get(i));
198			assertEquals(3, aa.getAndAdd(i, -4));
199			assertEquals(-1, aa.get(i));
200	dl	1.1	}
201			}
202
203	dl	1.4	/**
204	dl	1.5	* getAndDecrement returns previous value and decrements
205	dl	1.4	*/
206	jsr166	1.12	public void testGetAndDecrement() {
207	jsr166	1.25	AtomicLongArray aa = new AtomicLongArray(SIZE);
208			for (int i = 0; i < SIZE; i++) {
209			aa.set(i, 1);
210			assertEquals(1, aa.getAndDecrement(i));
211			assertEquals(0, aa.getAndDecrement(i));
212			assertEquals(-1, aa.getAndDecrement(i));
213	dl	1.1	}
214			}
215
216	dl	1.4	/**
217	dl	1.5	* getAndIncrement returns previous value and increments
218	dl	1.4	*/
219	jsr166	1.12	public void testGetAndIncrement() {
220	jsr166	1.25	AtomicLongArray aa = new AtomicLongArray(SIZE);
221			for (int i = 0; i < SIZE; i++) {
222			aa.set(i, 1);
223			assertEquals(1, aa.getAndIncrement(i));
224			assertEquals(2, aa.get(i));
225			aa.set(i, -2);
226			assertEquals(-2, aa.getAndIncrement(i));
227			assertEquals(-1, aa.getAndIncrement(i));
228			assertEquals(0, aa.getAndIncrement(i));
229			assertEquals(1, aa.get(i));
230	dl	1.1	}
231			}
232
233	dl	1.4	/**
234	jsr166	1.18	* addAndGet adds given value to current, and returns current value
235	dl	1.4	*/
236	dl	1.1	public void testAddAndGet() {
237	jsr166	1.25	AtomicLongArray aa = new AtomicLongArray(SIZE);
238			for (int i = 0; i < SIZE; i++) {
239			aa.set(i, 1);
240			assertEquals(3, aa.addAndGet(i, 2));
241			assertEquals(3, aa.get(i));
242			assertEquals(-1, aa.addAndGet(i, -4));
243			assertEquals(-1, aa.get(i));
244	dl	1.1	}
245			}
246
247	dl	1.4	/**
248	dl	1.5	* decrementAndGet decrements and returns current value
249	dl	1.4	*/
250	jsr166	1.12	public void testDecrementAndGet() {
251	jsr166	1.25	AtomicLongArray aa = new AtomicLongArray(SIZE);
252			for (int i = 0; i < SIZE; i++) {
253			aa.set(i, 1);
254			assertEquals(0, aa.decrementAndGet(i));
255			assertEquals(-1, aa.decrementAndGet(i));
256			assertEquals(-2, aa.decrementAndGet(i));
257			assertEquals(-2, aa.get(i));
258	dl	1.1	}
259			}
260
261	dl	1.4	/**
262	dl	1.5	* incrementAndGet increments and returns current value
263	dl	1.4	*/
264	dl	1.1	public void testIncrementAndGet() {
265	jsr166	1.25	AtomicLongArray aa = new AtomicLongArray(SIZE);
266			for (int i = 0; i < SIZE; i++) {
267			aa.set(i, 1);
268			assertEquals(2, aa.incrementAndGet(i));
269			assertEquals(2, aa.get(i));
270			aa.set(i, -2);
271			assertEquals(-1, aa.incrementAndGet(i));
272			assertEquals(0, aa.incrementAndGet(i));
273			assertEquals(1, aa.incrementAndGet(i));
274			assertEquals(1, aa.get(i));
275	dl	1.1	}
276			}
277	dl	1.2
278	jsr166	1.17	class Counter extends CheckedRunnable {
279	jsr166	1.25	final AtomicLongArray aa;
280	jsr166	1.36	int decs;
281	jsr166	1.25	Counter(AtomicLongArray a) { aa = a; }
282	jsr166	1.17	public void realRun() {
283	dl	1.3	for (;;) {
284			boolean done = true;
285	jsr166	1.25	for (int i = 0; i < aa.length(); i++) {
286			long v = aa.get(i);
287	jsr166	1.17	assertTrue(v >= 0);
288	dl	1.3	if (v != 0) {
289			done = false;
290	jsr166	1.32	if (aa.compareAndSet(i, v, v - 1))
291	jsr166	1.36	decs++;
292	dl	1.3	}
293			}
294			if (done)
295			break;
296			}
297			}
298			}
299
300	dl	1.4	/**
301	dl	1.5	* Multiple threads using same array of counters successfully
302			* update a number of times equal to total count
303	dl	1.4	*/
304	jsr166	1.13	public void testCountingInMultipleThreads() throws InterruptedException {
305	jsr166	1.25	final AtomicLongArray aa = new AtomicLongArray(SIZE);
306	jsr166	1.27	long countdown = 10000;
307	jsr166	1.25	for (int i = 0; i < SIZE; i++)
308	jsr166	1.27	aa.set(i, countdown);
309	jsr166	1.25	Counter c1 = new Counter(aa);
310			Counter c2 = new Counter(aa);
311	jsr166	1.36	Thread t1 = newStartedThread(c1);
312			Thread t2 = newStartedThread(c2);
313	jsr166	1.13	t1.join();
314			t2.join();
315	jsr166	1.36	assertEquals(c1.decs + c2.decs, SIZE * countdown);
316	dl	1.3	}
317
318	dl	1.4	/**
319	jsr166	1.37	* a deserialized/reserialized array holds same values in same order
320	dl	1.4	*/
321	jsr166	1.13	public void testSerialization() throws Exception {
322	jsr166	1.21	AtomicLongArray x = new AtomicLongArray(SIZE);
323	jsr166	1.25	for (int i = 0; i < SIZE; i++)
324	jsr166	1.21	x.set(i, -i);
325			AtomicLongArray y = serialClone(x);
326	jsr166	1.26	assertNotSame(x, y);
327	jsr166	1.21	assertEquals(x.length(), y.length());
328	jsr166	1.25	for (int i = 0; i < SIZE; i++) {
329	jsr166	1.21	assertEquals(x.get(i), y.get(i));
330	dl	1.2	}
331	dl	1.8	}
332
333			/**
334			* toString returns current value.
335	jsr166	1.10	*/
336	dl	1.8	public void testToString() {
337	jsr166	1.22	long[] a = { 17, 3, -42, 99, -7 };
338	jsr166	1.25	AtomicLongArray aa = new AtomicLongArray(a);
339			assertEquals(Arrays.toString(a), aa.toString());
340	dl	1.2	}
341
342	dl	1.1	}