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 ai = new AtomicIntegerArray(SIZE);
        for (int i = 0; i < SIZE; ++i)
            assertEquals(0, ai.get(i));
    }

    /**
     * constructor with null array throws NPE
     */
    public void testConstructor2NPE() {
        try {
            int[] a = null;
            AtomicIntegerArray ai = 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 ai = new AtomicIntegerArray(a);
        assertEquals(a.length, ai.length());
        for (int i = 0; i < a.length; ++i)
            assertEquals(a[i], ai.get(i));
    }

    /**
     * get and set for out of bound indices throw IndexOutOfBoundsException
     */
    public void testIndexing() {
        AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
        try {
            ai.get(SIZE);
            shouldThrow();
        } catch (IndexOutOfBoundsException success) {
        }
        try {
            ai.get(-1);
            shouldThrow();
        } catch (IndexOutOfBoundsException success) {
        }
        try {
            ai.set(SIZE, 0);
            shouldThrow();
        } catch (IndexOutOfBoundsException success) {
        }
        try {
            ai.set(-1, 0);
            shouldThrow();
        } catch (IndexOutOfBoundsException success) {
        }
    }

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

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

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

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

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

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

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

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

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

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

    static final int COUNTDOWN = 100000;

    class Counter extends CheckedRunnable {
        final AtomicIntegerArray ai;
        volatile int counts;
        Counter(AtomicIntegerArray a) { ai = a; }
        public void realRun() {
            for (;;) {
                boolean done = true;
                for (int i = 0; i < ai.length(); ++i) {
                    int v = ai.get(i);
                    assertTrue(v >= 0);
                    if (v != 0) {
                        done = false;
                        if (ai.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 ai = new AtomicIntegerArray(SIZE);
        for (int i = 0; i < SIZE; ++i)
            ai.set(i, COUNTDOWN);
        Counter c1 = new Counter(ai);
        Counter c2 = new Counter(ai);
        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 ai = new AtomicIntegerArray(a);
        assertEquals(Arrays.toString(a), ai.toString());
    }

}
Revision:	1.25
Committed:	Fri Jun 10 20:17:11 2011 UTC (12 years, 11 months ago) by jsr166
Branch:	MAIN
Changes since 1.24:	+1 -1 lines
Log Message:	fix order of arguments to assert(Equals\|Same) methods
#	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	dl	1.3	AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
27	jsr166	1.11	for (int i = 0; i < SIZE; ++i)
28	jsr166	1.24	assertEquals(0, ai.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			AtomicIntegerArray ai = 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	dl	1.7	AtomicIntegerArray ai = new AtomicIntegerArray(a);
48			assertEquals(a.length, ai.length());
49	jsr166	1.11	for (int i = 0; i < a.length; ++i)
50	dl	1.7	assertEquals(a[i], ai.get(i));
51			}
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	dl	1.5	AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
58			try {
59			ai.get(SIZE);
60	jsr166	1.14	shouldThrow();
61	jsr166	1.13	} catch (IndexOutOfBoundsException success) {
62	dl	1.5	}
63			try {
64			ai.get(-1);
65	jsr166	1.14	shouldThrow();
66	jsr166	1.13	} catch (IndexOutOfBoundsException success) {
67	dl	1.5	}
68			try {
69			ai.set(SIZE, 0);
70	jsr166	1.14	shouldThrow();
71	jsr166	1.13	} catch (IndexOutOfBoundsException success) {
72	dl	1.5	}
73			try {
74			ai.set(-1, 0);
75	jsr166	1.14	shouldThrow();
76	jsr166	1.13	} catch (IndexOutOfBoundsException success) {
77	dl	1.5	}
78			}
79
80			/**
81			* get returns the last value set at index
82	dl	1.4	*/
83			public void testGetSet() {
84	jsr166	1.11	AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
85	dl	1.3	for (int i = 0; i < SIZE; ++i) {
86	dl	1.1	ai.set(i, 1);
87	jsr166	1.24	assertEquals(1, ai.get(i));
88	dl	1.1	ai.set(i, 2);
89	jsr166	1.24	assertEquals(2, ai.get(i));
90	dl	1.1	ai.set(i, -3);
91	jsr166	1.24	assertEquals(-3, ai.get(i));
92	dl	1.1	}
93			}
94
95	dl	1.4	/**
96	dl	1.10	* get returns the last value lazySet at index by same thread
97			*/
98			public void testGetLazySet() {
99	jsr166	1.11	AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
100	dl	1.10	for (int i = 0; i < SIZE; ++i) {
101			ai.lazySet(i, 1);
102	jsr166	1.24	assertEquals(1, ai.get(i));
103	dl	1.10	ai.lazySet(i, 2);
104	jsr166	1.24	assertEquals(2, ai.get(i));
105	dl	1.10	ai.lazySet(i, -3);
106	jsr166	1.24	assertEquals(-3, ai.get(i));
107	dl	1.10	}
108			}
109
110			/**
111	dl	1.5	* compareAndSet succeeds in changing value if equal to expected else fails
112	dl	1.4	*/
113			public void testCompareAndSet() {
114	jsr166	1.11	AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
115	dl	1.3	for (int i = 0; i < SIZE; ++i) {
116	dl	1.1	ai.set(i, 1);
117	jsr166	1.24	assertTrue(ai.compareAndSet(i, 1, 2));
118			assertTrue(ai.compareAndSet(i, 2, -4));
119			assertEquals(-4, ai.get(i));
120			assertFalse(ai.compareAndSet(i, -5, 7));
121			assertEquals(-4, ai.get(i));
122			assertTrue(ai.compareAndSet(i, -4, 7));
123			assertEquals(7, ai.get(i));
124	dl	1.1	}
125			}
126
127	dl	1.4	/**
128	dl	1.5	* compareAndSet in one thread enables another waiting for value
129			* to succeed
130			*/
131	jsr166	1.14	public void testCompareAndSetInMultipleThreads() throws Exception {
132	dl	1.5	final AtomicIntegerArray a = new AtomicIntegerArray(1);
133			a.set(0, 1);
134	jsr166	1.15	Thread t = new Thread(new CheckedRunnable() {
135			public void realRun() {
136			while (!a.compareAndSet(0, 2, 3))
137			Thread.yield();
138			}});
139	jsr166	1.14
140			t.start();
141			assertTrue(a.compareAndSet(0, 1, 2));
142			t.join(LONG_DELAY_MS);
143			assertFalse(t.isAlive());
144	jsr166	1.25	assertEquals(3, a.get(0));
145	dl	1.5	}
146
147			/**
148			* repeated weakCompareAndSet succeeds in changing value when equal
149	jsr166	1.11	* to expected
150	dl	1.4	*/
151			public void testWeakCompareAndSet() {
152	jsr166	1.11	AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
153	dl	1.3	for (int i = 0; i < SIZE; ++i) {
154	dl	1.1	ai.set(i, 1);
155	jsr166	1.24	while (!ai.weakCompareAndSet(i, 1, 2));
156			while (!ai.weakCompareAndSet(i, 2, -4));
157			assertEquals(-4, ai.get(i));
158			while (!ai.weakCompareAndSet(i, -4, 7));
159			assertEquals(7, ai.get(i));
160	dl	1.1	}
161			}
162
163	dl	1.4	/**
164	jsr166	1.19	* getAndSet returns previous value and sets to given value at given index
165	dl	1.4	*/
166			public void testGetAndSet() {
167	jsr166	1.11	AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
168	dl	1.3	for (int i = 0; i < SIZE; ++i) {
169	dl	1.1	ai.set(i, 1);
170	jsr166	1.24	assertEquals(1, ai.getAndSet(i, 0));
171			assertEquals(0, ai.getAndSet(i, -10));
172			assertEquals(-10, ai.getAndSet(i, 1));
173	dl	1.1	}
174			}
175
176	dl	1.4	/**
177	jsr166	1.19	* getAndAdd returns previous value and adds given value
178	dl	1.4	*/
179			public void testGetAndAdd() {
180	jsr166	1.11	AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
181	dl	1.3	for (int i = 0; i < SIZE; ++i) {
182	dl	1.1	ai.set(i, 1);
183	jsr166	1.24	assertEquals(1, ai.getAndAdd(i, 2));
184			assertEquals(3, ai.get(i));
185			assertEquals(3, ai.getAndAdd(i, -4));
186			assertEquals(-1, ai.get(i));
187	dl	1.1	}
188			}
189
190	dl	1.4	/**
191	dl	1.5	* getAndDecrement returns previous value and decrements
192	dl	1.4	*/
193			public void testGetAndDecrement() {
194	jsr166	1.11	AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
195	dl	1.3	for (int i = 0; i < SIZE; ++i) {
196	dl	1.1	ai.set(i, 1);
197	jsr166	1.24	assertEquals(1, ai.getAndDecrement(i));
198			assertEquals(0, ai.getAndDecrement(i));
199			assertEquals(-1, ai.getAndDecrement(i));
200	dl	1.1	}
201			}
202
203	dl	1.4	/**
204	dl	1.5	* getAndIncrement returns previous value and increments
205	dl	1.4	*/
206			public void testGetAndIncrement() {
207	jsr166	1.11	AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
208	dl	1.3	for (int i = 0; i < SIZE; ++i) {
209	dl	1.1	ai.set(i, 1);
210	jsr166	1.24	assertEquals(1, ai.getAndIncrement(i));
211			assertEquals(2, ai.get(i));
212			ai.set(i, -2);
213			assertEquals(-2, ai.getAndIncrement(i));
214			assertEquals(-1, ai.getAndIncrement(i));
215			assertEquals(0, ai.getAndIncrement(i));
216			assertEquals(1, ai.get(i));
217	dl	1.1	}
218			}
219
220	dl	1.4	/**
221	jsr166	1.19	* addAndGet adds given value to current, and returns current value
222	dl	1.4	*/
223	dl	1.1	public void testAddAndGet() {
224	jsr166	1.11	AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
225	dl	1.3	for (int i = 0; i < SIZE; ++i) {
226	dl	1.1	ai.set(i, 1);
227	jsr166	1.24	assertEquals(3, ai.addAndGet(i, 2));
228			assertEquals(3, ai.get(i));
229			assertEquals(-1, ai.addAndGet(i, -4));
230			assertEquals(-1, ai.get(i));
231	dl	1.1	}
232			}
233
234	dl	1.4	/**
235	dl	1.5	* decrementAndGet decrements and returns current value
236	dl	1.4	*/
237			public void testDecrementAndGet() {
238	jsr166	1.11	AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
239	dl	1.3	for (int i = 0; i < SIZE; ++i) {
240	dl	1.1	ai.set(i, 1);
241	jsr166	1.24	assertEquals(0, ai.decrementAndGet(i));
242			assertEquals(-1, ai.decrementAndGet(i));
243			assertEquals(-2, ai.decrementAndGet(i));
244			assertEquals(-2, ai.get(i));
245	dl	1.1	}
246			}
247
248	dl	1.4	/**
249	jsr166	1.19	* incrementAndGet increments and returns current value
250	dl	1.4	*/
251	dl	1.1	public void testIncrementAndGet() {
252	jsr166	1.11	AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
253	dl	1.3	for (int i = 0; i < SIZE; ++i) {
254	dl	1.1	ai.set(i, 1);
255	jsr166	1.24	assertEquals(2, ai.incrementAndGet(i));
256			assertEquals(2, ai.get(i));
257	dl	1.1	ai.set(i, -2);
258	jsr166	1.24	assertEquals(-1, ai.incrementAndGet(i));
259			assertEquals(0, ai.incrementAndGet(i));
260			assertEquals(1, ai.incrementAndGet(i));
261			assertEquals(1, ai.get(i));
262	dl	1.2	}
263			}
264
265	dl	1.3	static final int COUNTDOWN = 100000;
266	jsr166	1.11
267	jsr166	1.18	class Counter extends CheckedRunnable {
268	dl	1.3	final AtomicIntegerArray ai;
269			volatile int counts;
270			Counter(AtomicIntegerArray a) { ai = a; }
271	jsr166	1.18	public void realRun() {
272	dl	1.3	for (;;) {
273			boolean done = true;
274			for (int i = 0; i < ai.length(); ++i) {
275			int v = ai.get(i);
276	jsr166	1.18	assertTrue(v >= 0);
277	dl	1.3	if (v != 0) {
278			done = false;
279			if (ai.compareAndSet(i, v, v-1))
280			++counts;
281			}
282			}
283			if (done)
284			break;
285			}
286			}
287			}
288
289	dl	1.4	/**
290	dl	1.5	* Multiple threads using same array of counters successfully
291			* update a number of times equal to total count
292	dl	1.4	*/
293	jsr166	1.14	public void testCountingInMultipleThreads() throws InterruptedException {
294			final AtomicIntegerArray ai = new AtomicIntegerArray(SIZE);
295			for (int i = 0; i < SIZE; ++i)
296			ai.set(i, COUNTDOWN);
297			Counter c1 = new Counter(ai);
298			Counter c2 = new Counter(ai);
299			Thread t1 = new Thread(c1);
300			Thread t2 = new Thread(c2);
301			t1.start();
302			t2.start();
303			t1.join();
304			t2.join();
305			assertEquals(c1.counts+c2.counts, SIZE * COUNTDOWN);
306	dl	1.3	}
307
308	dl	1.4	/**
309	dl	1.5	* a deserialized serialized array holds same values
310	dl	1.4	*/
311	jsr166	1.14	public void testSerialization() throws Exception {
312	jsr166	1.22	AtomicIntegerArray x = new AtomicIntegerArray(SIZE);
313			for (int i = 0; i < SIZE; i++)
314			x.set(i, -i);
315			AtomicIntegerArray y = serialClone(x);
316			assertTrue(x != y);
317			assertEquals(x.length(), y.length());
318			for (int i = 0; i < SIZE; i++) {
319			assertEquals(x.get(i), y.get(i));
320	dl	1.1	}
321			}
322
323	dl	1.9	/**
324			* toString returns current value.
325	jsr166	1.11	*/
326	dl	1.9	public void testToString() {
327	jsr166	1.23	int[] a = { 17, 3, -42, 99, -7 };
328	dl	1.9	AtomicIntegerArray ai = new AtomicIntegerArray(a);
329			assertEquals(Arrays.toString(a), ai.toString());
330			}
331	dl	1.8
332	dl	1.1	}