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

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);
            while (!aa.weakCompareAndSet(i, 1, 2));
            while (!aa.weakCompareAndSet(i, 2, -4));
            assertEquals(-4, aa.get(i));
            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));
        }
    }

    static final int COUNTDOWN = 100000;

    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);
        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);
        assertTrue(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:	1.26
Committed:	Wed Aug 10 07:14:48 2011 UTC (12 years, 9 months ago) by jsr166
Branch:	MAIN
Changes since 1.25:	+137 -127 lines
Log Message:	minor improvements
#	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			import junit.framework.*;
10	jsr166	1.22	import java.util.Arrays;
11			import java.util.concurrent.atomic.AtomicIntegerArray;
12	dl	1.1
13	dl	1.3	public class AtomicIntegerArrayTest extends JSR166TestCase {
14	dl	1.1
15	jsr166	1.17	public static void main(String[] args) {
16			junit.textui.TestRunner.run(suite());
17	dl	1.1	}
18			public static Test suite() {
19			return new TestSuite(AtomicIntegerArrayTest.class);
20			}
21
22	dl	1.4	/**
23	dl	1.5	* constructor creates array of given size with all elements zero
24	dl	1.4	*/
25			public void testConstructor() {
26	jsr166	1.26	AtomicIntegerArray aa = new AtomicIntegerArray(SIZE);
27			for (int i = 0; i < SIZE; i++)
28			assertEquals(0, aa.get(i));
29	dl	1.1	}
30
31	dl	1.4	/**
32	dl	1.7	* constructor with null array throws NPE
33			*/
34			public void testConstructor2NPE() {
35			try {
36			int[] a = null;
37	jsr166	1.26	AtomicIntegerArray aa = new AtomicIntegerArray(a);
38	jsr166	1.14	shouldThrow();
39			} catch (NullPointerException success) {}
40	dl	1.7	}
41
42			/**
43			* constructor with array is of same size and has all elements
44			*/
45			public void testConstructor2() {
46	jsr166	1.23	int[] a = { 17, 3, -42, 99, -7 };
47	jsr166	1.26	AtomicIntegerArray aa = new AtomicIntegerArray(a);
48			assertEquals(a.length, aa.length());
49			for (int i = 0; i < a.length; i++)
50			assertEquals(a[i], aa.get(i));
51	dl	1.7	}
52
53			/**
54	dl	1.5	* get and set for out of bound indices throw IndexOutOfBoundsException
55			*/
56	jsr166	1.13	public void testIndexing() {
57	jsr166	1.26	AtomicIntegerArray aa = new AtomicIntegerArray(SIZE);
58			for (int index : new int[] { -1, SIZE }) {
59			try {
60			aa.get(index);
61			shouldThrow();
62			} catch (IndexOutOfBoundsException success) {}
63			try {
64			aa.set(index, 1);
65			shouldThrow();
66			} catch (IndexOutOfBoundsException success) {}
67			try {
68			aa.lazySet(index, 1);
69			shouldThrow();
70			} catch (IndexOutOfBoundsException success) {}
71			try {
72			aa.compareAndSet(index, 1, 2);
73			shouldThrow();
74			} catch (IndexOutOfBoundsException success) {}
75			try {
76			aa.weakCompareAndSet(index, 1, 2);
77			shouldThrow();
78			} catch (IndexOutOfBoundsException success) {}
79			try {
80			aa.getAndAdd(index, 1);
81			shouldThrow();
82			} catch (IndexOutOfBoundsException success) {}
83			try {
84			aa.addAndGet(index, 1);
85			shouldThrow();
86			} catch (IndexOutOfBoundsException success) {}
87	dl	1.5	}
88			}
89
90			/**
91			* get returns the last value set at index
92	dl	1.4	*/
93			public void testGetSet() {
94	jsr166	1.26	AtomicIntegerArray aa = new AtomicIntegerArray(SIZE);
95			for (int i = 0; i < SIZE; i++) {
96			aa.set(i, 1);
97			assertEquals(1, aa.get(i));
98			aa.set(i, 2);
99			assertEquals(2, aa.get(i));
100			aa.set(i, -3);
101			assertEquals(-3, aa.get(i));
102	dl	1.1	}
103			}
104
105	dl	1.4	/**
106	dl	1.10	* get returns the last value lazySet at index by same thread
107			*/
108			public void testGetLazySet() {
109	jsr166	1.26	AtomicIntegerArray aa = new AtomicIntegerArray(SIZE);
110			for (int i = 0; i < SIZE; i++) {
111			aa.lazySet(i, 1);
112			assertEquals(1, aa.get(i));
113			aa.lazySet(i, 2);
114			assertEquals(2, aa.get(i));
115			aa.lazySet(i, -3);
116			assertEquals(-3, aa.get(i));
117	dl	1.10	}
118			}
119
120			/**
121	dl	1.5	* compareAndSet succeeds in changing value if equal to expected else fails
122	dl	1.4	*/
123			public void testCompareAndSet() {
124	jsr166	1.26	AtomicIntegerArray aa = new AtomicIntegerArray(SIZE);
125			for (int i = 0; i < SIZE; i++) {
126			aa.set(i, 1);
127			assertTrue(aa.compareAndSet(i, 1, 2));
128			assertTrue(aa.compareAndSet(i, 2, -4));
129			assertEquals(-4, aa.get(i));
130			assertFalse(aa.compareAndSet(i, -5, 7));
131			assertEquals(-4, aa.get(i));
132			assertTrue(aa.compareAndSet(i, -4, 7));
133			assertEquals(7, aa.get(i));
134	dl	1.1	}
135			}
136
137	dl	1.4	/**
138	dl	1.5	* compareAndSet in one thread enables another waiting for value
139			* to succeed
140			*/
141	jsr166	1.14	public void testCompareAndSetInMultipleThreads() throws Exception {
142	dl	1.5	final AtomicIntegerArray a = new AtomicIntegerArray(1);
143			a.set(0, 1);
144	jsr166	1.15	Thread t = new Thread(new CheckedRunnable() {
145			public void realRun() {
146			while (!a.compareAndSet(0, 2, 3))
147			Thread.yield();
148			}});
149	jsr166	1.14
150			t.start();
151			assertTrue(a.compareAndSet(0, 1, 2));
152			t.join(LONG_DELAY_MS);
153			assertFalse(t.isAlive());
154	jsr166	1.25	assertEquals(3, a.get(0));
155	dl	1.5	}
156
157			/**
158			* repeated weakCompareAndSet succeeds in changing value when equal
159	jsr166	1.11	* to expected
160	dl	1.4	*/
161			public void testWeakCompareAndSet() {
162	jsr166	1.26	AtomicIntegerArray aa = new AtomicIntegerArray(SIZE);
163			for (int i = 0; i < SIZE; i++) {
164			aa.set(i, 1);
165			while (!aa.weakCompareAndSet(i, 1, 2));
166			while (!aa.weakCompareAndSet(i, 2, -4));
167			assertEquals(-4, aa.get(i));
168			while (!aa.weakCompareAndSet(i, -4, 7));
169			assertEquals(7, aa.get(i));
170	dl	1.1	}
171			}
172
173	dl	1.4	/**
174	jsr166	1.19	* getAndSet returns previous value and sets to given value at given index
175	dl	1.4	*/
176			public void testGetAndSet() {
177	jsr166	1.26	AtomicIntegerArray aa = new AtomicIntegerArray(SIZE);
178			for (int i = 0; i < SIZE; i++) {
179			aa.set(i, 1);
180			assertEquals(1, aa.getAndSet(i, 0));
181			assertEquals(0, aa.getAndSet(i, -10));
182			assertEquals(-10, aa.getAndSet(i, 1));
183	dl	1.1	}
184			}
185
186	dl	1.4	/**
187	jsr166	1.19	* getAndAdd returns previous value and adds given value
188	dl	1.4	*/
189			public void testGetAndAdd() {
190	jsr166	1.26	AtomicIntegerArray aa = new AtomicIntegerArray(SIZE);
191			for (int i = 0; i < SIZE; i++) {
192			aa.set(i, 1);
193			assertEquals(1, aa.getAndAdd(i, 2));
194			assertEquals(3, aa.get(i));
195			assertEquals(3, aa.getAndAdd(i, -4));
196			assertEquals(-1, aa.get(i));
197	dl	1.1	}
198			}
199
200	dl	1.4	/**
201	dl	1.5	* getAndDecrement returns previous value and decrements
202	dl	1.4	*/
203			public void testGetAndDecrement() {
204	jsr166	1.26	AtomicIntegerArray aa = new AtomicIntegerArray(SIZE);
205			for (int i = 0; i < SIZE; i++) {
206			aa.set(i, 1);
207			assertEquals(1, aa.getAndDecrement(i));
208			assertEquals(0, aa.getAndDecrement(i));
209			assertEquals(-1, aa.getAndDecrement(i));
210	dl	1.1	}
211			}
212
213	dl	1.4	/**
214	dl	1.5	* getAndIncrement returns previous value and increments
215	dl	1.4	*/
216			public void testGetAndIncrement() {
217	jsr166	1.26	AtomicIntegerArray aa = new AtomicIntegerArray(SIZE);
218			for (int i = 0; i < SIZE; i++) {
219			aa.set(i, 1);
220			assertEquals(1, aa.getAndIncrement(i));
221			assertEquals(2, aa.get(i));
222			aa.set(i, -2);
223			assertEquals(-2, aa.getAndIncrement(i));
224			assertEquals(-1, aa.getAndIncrement(i));
225			assertEquals(0, aa.getAndIncrement(i));
226			assertEquals(1, aa.get(i));
227	dl	1.1	}
228			}
229
230	dl	1.4	/**
231	jsr166	1.19	* addAndGet adds given value to current, and returns current value
232	dl	1.4	*/
233	dl	1.1	public void testAddAndGet() {
234	jsr166	1.26	AtomicIntegerArray aa = new AtomicIntegerArray(SIZE);
235			for (int i = 0; i < SIZE; i++) {
236			aa.set(i, 1);
237			assertEquals(3, aa.addAndGet(i, 2));
238			assertEquals(3, aa.get(i));
239			assertEquals(-1, aa.addAndGet(i, -4));
240			assertEquals(-1, aa.get(i));
241	dl	1.1	}
242			}
243
244	dl	1.4	/**
245	dl	1.5	* decrementAndGet decrements and returns current value
246	dl	1.4	*/
247			public void testDecrementAndGet() {
248	jsr166	1.26	AtomicIntegerArray aa = new AtomicIntegerArray(SIZE);
249			for (int i = 0; i < SIZE; i++) {
250			aa.set(i, 1);
251			assertEquals(0, aa.decrementAndGet(i));
252			assertEquals(-1, aa.decrementAndGet(i));
253			assertEquals(-2, aa.decrementAndGet(i));
254			assertEquals(-2, aa.get(i));
255	dl	1.1	}
256			}
257
258	dl	1.4	/**
259	jsr166	1.19	* incrementAndGet increments and returns current value
260	dl	1.4	*/
261	dl	1.1	public void testIncrementAndGet() {
262	jsr166	1.26	AtomicIntegerArray aa = new AtomicIntegerArray(SIZE);
263			for (int i = 0; i < SIZE; i++) {
264			aa.set(i, 1);
265			assertEquals(2, aa.incrementAndGet(i));
266			assertEquals(2, aa.get(i));
267			aa.set(i, -2);
268			assertEquals(-1, aa.incrementAndGet(i));
269			assertEquals(0, aa.incrementAndGet(i));
270			assertEquals(1, aa.incrementAndGet(i));
271			assertEquals(1, aa.get(i));
272	dl	1.2	}
273			}
274
275	dl	1.3	static final int COUNTDOWN = 100000;
276	jsr166	1.11
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			for (int i = 0; i < SIZE; i++)
306			aa.set(i, COUNTDOWN);
307			Counter c1 = new Counter(aa);
308			Counter c2 = new Counter(aa);
309	jsr166	1.14	Thread t1 = new Thread(c1);
310			Thread t2 = new Thread(c2);
311			t1.start();
312			t2.start();
313			t1.join();
314			t2.join();
315			assertEquals(c1.counts+c2.counts, SIZE * COUNTDOWN);
316	dl	1.3	}
317
318	dl	1.4	/**
319	dl	1.5	* a deserialized serialized array holds same values
320	dl	1.4	*/
321	jsr166	1.14	public void testSerialization() throws Exception {
322	jsr166	1.22	AtomicIntegerArray x = new AtomicIntegerArray(SIZE);
323			for (int i = 0; i < SIZE; i++)
324			x.set(i, -i);
325			AtomicIntegerArray y = serialClone(x);
326			assertTrue(x != y);
327			assertEquals(x.length(), y.length());
328			for (int i = 0; i < SIZE; i++) {
329			assertEquals(x.get(i), y.get(i));
330	dl	1.1	}
331			}
332
333	dl	1.9	/**
334			* toString returns current value.
335	jsr166	1.11	*/
336	dl	1.9	public void testToString() {
337	jsr166	1.23	int[] a = { 17, 3, -42, 99, -7 };
338	jsr166	1.26	AtomicIntegerArray aa = new AtomicIntegerArray(a);
339			assertEquals(Arrays.toString(a), aa.toString());
340	dl	1.9	}
341	dl	1.8
342	dl	1.1	}