test/tck/AtomicIntegerArrayTest.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.AtomicIntegerArray;

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

public class AtomicIntegerArrayTest extends JSR166TestCase {

    public static void main(String[] args) {
        junit.textui.TestRunner.run(suite());
    }
    public static Test suite() {
        return new TestSuite(AtomicIntegerArrayTest.class);
    }

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

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

    /**
     * constructor with array is of same size and has all elements
     */
    public void testConstructor2() {
        int[] a = { 17, 3, -42, 99, -7 };
        AtomicIntegerArray aa = new AtomicIntegerArray(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
     */
    public void testIndexing() {
        AtomicIntegerArray aa = new AtomicIntegerArray(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() {
        AtomicIntegerArray aa = new AtomicIntegerArray(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() {
        AtomicIntegerArray aa = new AtomicIntegerArray(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() {
        AtomicIntegerArray aa = new AtomicIntegerArray(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 Exception {
        final AtomicIntegerArray a = new AtomicIntegerArray(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
     */
    public void testWeakCompareAndSet() {
        AtomicIntegerArray aa = new AtomicIntegerArray(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() {
        AtomicIntegerArray aa = new AtomicIntegerArray(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() {
        AtomicIntegerArray aa = new AtomicIntegerArray(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() {
        AtomicIntegerArray aa = new AtomicIntegerArray(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() {
        AtomicIntegerArray aa = new AtomicIntegerArray(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() {
        AtomicIntegerArray aa = new AtomicIntegerArray(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() {
        AtomicIntegerArray aa = new AtomicIntegerArray(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() {
        AtomicIntegerArray aa = new AtomicIntegerArray(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 AtomicIntegerArray aa;
        volatile int counts;
        Counter(AtomicIntegerArray a) { aa = a; }
        public void realRun() {
            for (;;) {
                boolean done = true;
                for (int i = 0; i < aa.length(); i++) {
                    int v = aa.get(i);
                    assertTrue(v >= 0);
                    if (v != 0) {
                        done = false;
                        if (aa.compareAndSet(i, v, v-1))
                            ++counts;
                    }
                }
                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 AtomicIntegerArray aa = new AtomicIntegerArray(SIZE);
        int 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 = new Thread(c1);
        Thread t2 = new Thread(c2);
        t1.start();
        t2.start();
        t1.join();
        t2.join();
        assertEquals(c1.counts+c2.counts, SIZE * countdown);
    }

    /**
     * a deserialized serialized array holds same values
     */
    public void testSerialization() throws Exception {
        AtomicIntegerArray x = new AtomicIntegerArray(SIZE);
        for (int i = 0; i < SIZE; i++)
            x.set(i, -i);
        AtomicIntegerArray 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() {
        int[] a = { 17, 3, -42, 99, -7 };
        AtomicIntegerArray aa = new AtomicIntegerArray(a);
        assertEquals(Arrays.toString(a), aa.toString());
    }

}
Revision:	1.30
Committed:	Wed Dec 31 19:21:20 2014 UTC (9 years, 4 months ago) by jsr166
Branch:	MAIN
Changes since 1.29:	+3 -3 lines
Log Message:	prefer do {} while (...); to while (...);
#	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	1.20	* http://creativecommons.org/publicdomain/zero/1.0/
5	jsr166	1.11	* Other contributors include Andrew Wright, Jeffrey Hayes,
6			* Pat Fisher, Mike Judd.
7	dl	1.1	*/
8
9	jsr166	1.22	import java.util.Arrays;
10			import java.util.concurrent.atomic.AtomicIntegerArray;
11	dl	1.1
12	jsr166	1.29	import junit.framework.Test;
13			import junit.framework.TestSuite;
14
15	dl	1.3	public class AtomicIntegerArrayTest extends JSR166TestCase {
16	dl	1.1
17	jsr166	1.17	public static void main(String[] args) {
18			junit.textui.TestRunner.run(suite());
19	dl	1.1	}
20			public static Test suite() {
21			return new TestSuite(AtomicIntegerArrayTest.class);
22			}
23
24	dl	1.4	/**
25	dl	1.5	* constructor creates array of given size with all elements zero
26	dl	1.4	*/
27			public void testConstructor() {
28	jsr166	1.26	AtomicIntegerArray aa = new AtomicIntegerArray(SIZE);
29			for (int i = 0; i < SIZE; i++)
30			assertEquals(0, aa.get(i));
31	dl	1.1	}
32
33	dl	1.4	/**
34	dl	1.7	* constructor with null array throws NPE
35			*/
36			public void testConstructor2NPE() {
37			try {
38			int[] a = null;
39	jsr166	1.26	AtomicIntegerArray aa = new AtomicIntegerArray(a);
40	jsr166	1.14	shouldThrow();
41			} catch (NullPointerException success) {}
42	dl	1.7	}
43
44			/**
45			* constructor with array is of same size and has all elements
46			*/
47			public void testConstructor2() {
48	jsr166	1.23	int[] a = { 17, 3, -42, 99, -7 };
49	jsr166	1.26	AtomicIntegerArray aa = new AtomicIntegerArray(a);
50			assertEquals(a.length, aa.length());
51			for (int i = 0; i < a.length; i++)
52			assertEquals(a[i], aa.get(i));
53	dl	1.7	}
54
55			/**
56	dl	1.5	* get and set for out of bound indices throw IndexOutOfBoundsException
57			*/
58	jsr166	1.13	public void testIndexing() {
59	jsr166	1.26	AtomicIntegerArray aa = new AtomicIntegerArray(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			public void testGetSet() {
96	jsr166	1.26	AtomicIntegerArray aa = new AtomicIntegerArray(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	1.10	* get returns the last value lazySet at index by same thread
109			*/
110			public void testGetLazySet() {
111	jsr166	1.26	AtomicIntegerArray aa = new AtomicIntegerArray(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	1.10	}
120			}
121
122			/**
123	dl	1.5	* compareAndSet succeeds in changing value if equal to expected else fails
124	dl	1.4	*/
125			public void testCompareAndSet() {
126	jsr166	1.26	AtomicIntegerArray aa = new AtomicIntegerArray(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	1.14	public void testCompareAndSetInMultipleThreads() throws Exception {
144	dl	1.5	final AtomicIntegerArray a = new AtomicIntegerArray(1);
145			a.set(0, 1);
146	jsr166	1.15	Thread t = new Thread(new CheckedRunnable() {
147			public void realRun() {
148			while (!a.compareAndSet(0, 2, 3))
149			Thread.yield();
150			}});
151	jsr166	1.14
152			t.start();
153			assertTrue(a.compareAndSet(0, 1, 2));
154			t.join(LONG_DELAY_MS);
155			assertFalse(t.isAlive());
156	jsr166	1.25	assertEquals(3, a.get(0));
157	dl	1.5	}
158
159			/**
160			* repeated weakCompareAndSet succeeds in changing value when equal
161	jsr166	1.11	* to expected
162	dl	1.4	*/
163			public void testWeakCompareAndSet() {
164	jsr166	1.26	AtomicIntegerArray aa = new AtomicIntegerArray(SIZE);
165			for (int i = 0; i < SIZE; i++) {
166			aa.set(i, 1);
167	jsr166	1.30	do {} while (!aa.weakCompareAndSet(i, 1, 2));
168			do {} while (!aa.weakCompareAndSet(i, 2, -4));
169	jsr166	1.26	assertEquals(-4, aa.get(i));
170	jsr166	1.30	do {} while (!aa.weakCompareAndSet(i, -4, 7));
171	jsr166	1.26	assertEquals(7, aa.get(i));
172	dl	1.1	}
173			}
174
175	dl	1.4	/**
176	jsr166	1.19	* getAndSet returns previous value and sets to given value at given index
177	dl	1.4	*/
178			public void testGetAndSet() {
179	jsr166	1.26	AtomicIntegerArray aa = new AtomicIntegerArray(SIZE);
180			for (int i = 0; i < SIZE; i++) {
181			aa.set(i, 1);
182			assertEquals(1, aa.getAndSet(i, 0));
183			assertEquals(0, aa.getAndSet(i, -10));
184			assertEquals(-10, aa.getAndSet(i, 1));
185	dl	1.1	}
186			}
187
188	dl	1.4	/**
189	jsr166	1.19	* getAndAdd returns previous value and adds given value
190	dl	1.4	*/
191			public void testGetAndAdd() {
192	jsr166	1.26	AtomicIntegerArray aa = new AtomicIntegerArray(SIZE);
193			for (int i = 0; i < SIZE; i++) {
194			aa.set(i, 1);
195			assertEquals(1, aa.getAndAdd(i, 2));
196			assertEquals(3, aa.get(i));
197			assertEquals(3, aa.getAndAdd(i, -4));
198			assertEquals(-1, aa.get(i));
199	dl	1.1	}
200			}
201
202	dl	1.4	/**
203	dl	1.5	* getAndDecrement returns previous value and decrements
204	dl	1.4	*/
205			public void testGetAndDecrement() {
206	jsr166	1.26	AtomicIntegerArray aa = new AtomicIntegerArray(SIZE);
207			for (int i = 0; i < SIZE; i++) {
208			aa.set(i, 1);
209			assertEquals(1, aa.getAndDecrement(i));
210			assertEquals(0, aa.getAndDecrement(i));
211			assertEquals(-1, aa.getAndDecrement(i));
212	dl	1.1	}
213			}
214
215	dl	1.4	/**
216	dl	1.5	* getAndIncrement returns previous value and increments
217	dl	1.4	*/
218			public void testGetAndIncrement() {
219	jsr166	1.26	AtomicIntegerArray aa = new AtomicIntegerArray(SIZE);
220			for (int i = 0; i < SIZE; i++) {
221			aa.set(i, 1);
222			assertEquals(1, aa.getAndIncrement(i));
223			assertEquals(2, aa.get(i));
224			aa.set(i, -2);
225			assertEquals(-2, aa.getAndIncrement(i));
226			assertEquals(-1, aa.getAndIncrement(i));
227			assertEquals(0, aa.getAndIncrement(i));
228			assertEquals(1, aa.get(i));
229	dl	1.1	}
230			}
231
232	dl	1.4	/**
233	jsr166	1.19	* addAndGet adds given value to current, and returns current value
234	dl	1.4	*/
235	dl	1.1	public void testAddAndGet() {
236	jsr166	1.26	AtomicIntegerArray aa = new AtomicIntegerArray(SIZE);
237			for (int i = 0; i < SIZE; i++) {
238			aa.set(i, 1);
239			assertEquals(3, aa.addAndGet(i, 2));
240			assertEquals(3, aa.get(i));
241			assertEquals(-1, aa.addAndGet(i, -4));
242			assertEquals(-1, aa.get(i));
243	dl	1.1	}
244			}
245
246	dl	1.4	/**
247	dl	1.5	* decrementAndGet decrements and returns current value
248	dl	1.4	*/
249			public void testDecrementAndGet() {
250	jsr166	1.26	AtomicIntegerArray aa = new AtomicIntegerArray(SIZE);
251			for (int i = 0; i < SIZE; i++) {
252			aa.set(i, 1);
253			assertEquals(0, aa.decrementAndGet(i));
254			assertEquals(-1, aa.decrementAndGet(i));
255			assertEquals(-2, aa.decrementAndGet(i));
256			assertEquals(-2, aa.get(i));
257	dl	1.1	}
258			}
259
260	dl	1.4	/**
261	jsr166	1.19	* incrementAndGet increments and returns current value
262	dl	1.4	*/
263	dl	1.1	public void testIncrementAndGet() {
264	jsr166	1.26	AtomicIntegerArray aa = new AtomicIntegerArray(SIZE);
265			for (int i = 0; i < SIZE; i++) {
266			aa.set(i, 1);
267			assertEquals(2, aa.incrementAndGet(i));
268			assertEquals(2, aa.get(i));
269			aa.set(i, -2);
270			assertEquals(-1, aa.incrementAndGet(i));
271			assertEquals(0, aa.incrementAndGet(i));
272			assertEquals(1, aa.incrementAndGet(i));
273			assertEquals(1, aa.get(i));
274	dl	1.2	}
275			}
276
277	jsr166	1.18	class Counter extends CheckedRunnable {
278	jsr166	1.26	final AtomicIntegerArray aa;
279	dl	1.3	volatile int counts;
280	jsr166	1.26	Counter(AtomicIntegerArray a) { aa = a; }
281	jsr166	1.18	public void realRun() {
282	dl	1.3	for (;;) {
283			boolean done = true;
284	jsr166	1.26	for (int i = 0; i < aa.length(); i++) {
285			int v = aa.get(i);
286	jsr166	1.18	assertTrue(v >= 0);
287	dl	1.3	if (v != 0) {
288			done = false;
289	jsr166	1.26	if (aa.compareAndSet(i, v, v-1))
290	dl	1.3	++counts;
291			}
292			}
293			if (done)
294			break;
295			}
296			}
297			}
298
299	dl	1.4	/**
300	dl	1.5	* Multiple threads using same array of counters successfully
301			* update a number of times equal to total count
302	dl	1.4	*/
303	jsr166	1.14	public void testCountingInMultipleThreads() throws InterruptedException {
304	jsr166	1.26	final AtomicIntegerArray aa = new AtomicIntegerArray(SIZE);
305	jsr166	1.28	int countdown = 10000;
306	jsr166	1.26	for (int i = 0; i < SIZE; i++)
307	jsr166	1.28	aa.set(i, countdown);
308	jsr166	1.26	Counter c1 = new Counter(aa);
309			Counter c2 = new Counter(aa);
310	jsr166	1.14	Thread t1 = new Thread(c1);
311			Thread t2 = new Thread(c2);
312			t1.start();
313			t2.start();
314			t1.join();
315			t2.join();
316	jsr166	1.28	assertEquals(c1.counts+c2.counts, SIZE * countdown);
317	dl	1.3	}
318
319	dl	1.4	/**
320	dl	1.5	* a deserialized serialized array holds same values
321	dl	1.4	*/
322	jsr166	1.14	public void testSerialization() throws Exception {
323	jsr166	1.22	AtomicIntegerArray x = new AtomicIntegerArray(SIZE);
324			for (int i = 0; i < SIZE; i++)
325			x.set(i, -i);
326			AtomicIntegerArray y = serialClone(x);
327	jsr166	1.27	assertNotSame(x, y);
328	jsr166	1.22	assertEquals(x.length(), y.length());
329			for (int i = 0; i < SIZE; i++) {
330			assertEquals(x.get(i), y.get(i));
331	dl	1.1	}
332			}
333
334	dl	1.9	/**
335			* toString returns current value.
336	jsr166	1.11	*/
337	dl	1.9	public void testToString() {
338	jsr166	1.23	int[] a = { 17, 3, -42, 99, -7 };
339	jsr166	1.26	AtomicIntegerArray aa = new AtomicIntegerArray(a);
340			assertEquals(Arrays.toString(a), aa.toString());
341	dl	1.9	}
342	dl	1.8
343	dl	1.1	}