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
     */
    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
     */
    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;
        volatile long counts;
        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))
                            ++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 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 = 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 {
        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:	1.35
Committed:	Fri Jun 17 19:00:48 2016 UTC (7 years, 10 months ago) by jsr166
Branch:	MAIN
Changes since 1.34:	+0 -242 lines
Log Message:	split jdk9 Atomic tests into separate *9Test.java files
#	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	jsr166	1.12	public void testIndexing() {
58	jsr166	1.25	AtomicLongArray aa = new AtomicLongArray(SIZE);
59			for (int index : new int[] { -1, SIZE }) {
60			try {
61			aa.get(index);
62			shouldThrow();
63			} catch (IndexOutOfBoundsException success) {}
64			try {
65			aa.set(index, 1);
66			shouldThrow();
67			} catch (IndexOutOfBoundsException success) {}
68			try {
69			aa.lazySet(index, 1);
70			shouldThrow();
71			} catch (IndexOutOfBoundsException success) {}
72			try {
73			aa.compareAndSet(index, 1, 2);
74			shouldThrow();
75			} catch (IndexOutOfBoundsException success) {}
76			try {
77			aa.weakCompareAndSet(index, 1, 2);
78			shouldThrow();
79			} catch (IndexOutOfBoundsException success) {}
80			try {
81			aa.getAndAdd(index, 1);
82			shouldThrow();
83			} catch (IndexOutOfBoundsException success) {}
84			try {
85			aa.addAndGet(index, 1);
86			shouldThrow();
87			} catch (IndexOutOfBoundsException success) {}
88	dl	1.5	}
89			}
90
91			/**
92			* get returns the last value set at index
93	dl	1.4	*/
94	jsr166	1.12	public void testGetSet() {
95	jsr166	1.25	AtomicLongArray aa = new AtomicLongArray(SIZE);
96			for (int i = 0; i < SIZE; i++) {
97			aa.set(i, 1);
98			assertEquals(1, aa.get(i));
99			aa.set(i, 2);
100			assertEquals(2, aa.get(i));
101			aa.set(i, -3);
102			assertEquals(-3, aa.get(i));
103	dl	1.1	}
104			}
105
106	dl	1.4	/**
107	dl	1.9	* get returns the last value lazySet at index by same thread
108			*/
109	jsr166	1.12	public void testGetLazySet() {
110	jsr166	1.25	AtomicLongArray aa = new AtomicLongArray(SIZE);
111			for (int i = 0; i < SIZE; i++) {
112			aa.lazySet(i, 1);
113			assertEquals(1, aa.get(i));
114			aa.lazySet(i, 2);
115			assertEquals(2, aa.get(i));
116			aa.lazySet(i, -3);
117			assertEquals(-3, aa.get(i));
118	dl	1.9	}
119			}
120
121			/**
122	dl	1.5	* compareAndSet succeeds in changing value if equal to expected else fails
123	dl	1.4	*/
124	jsr166	1.12	public void testCompareAndSet() {
125	jsr166	1.25	AtomicLongArray aa = new AtomicLongArray(SIZE);
126			for (int i = 0; i < SIZE; i++) {
127			aa.set(i, 1);
128			assertTrue(aa.compareAndSet(i, 1, 2));
129			assertTrue(aa.compareAndSet(i, 2, -4));
130			assertEquals(-4, aa.get(i));
131			assertFalse(aa.compareAndSet(i, -5, 7));
132			assertEquals(-4, aa.get(i));
133			assertTrue(aa.compareAndSet(i, -4, 7));
134			assertEquals(7, aa.get(i));
135	dl	1.1	}
136			}
137
138	dl	1.4	/**
139	dl	1.5	* compareAndSet in one thread enables another waiting for value
140			* to succeed
141			*/
142	jsr166	1.13	public void testCompareAndSetInMultipleThreads() throws InterruptedException {
143	dl	1.5	final AtomicLongArray a = new AtomicLongArray(1);
144			a.set(0, 1);
145	jsr166	1.14	Thread t = new Thread(new CheckedRunnable() {
146			public void realRun() {
147			while (!a.compareAndSet(0, 2, 3))
148			Thread.yield();
149			}});
150	jsr166	1.13
151			t.start();
152			assertTrue(a.compareAndSet(0, 1, 2));
153			t.join(LONG_DELAY_MS);
154			assertFalse(t.isAlive());
155	jsr166	1.24	assertEquals(3, a.get(0));
156	dl	1.5	}
157
158			/**
159			* repeated weakCompareAndSet succeeds in changing value when equal
160	jsr166	1.10	* to expected
161	dl	1.4	*/
162	jsr166	1.12	public void testWeakCompareAndSet() {
163	jsr166	1.25	AtomicLongArray aa = new AtomicLongArray(SIZE);
164			for (int i = 0; i < SIZE; i++) {
165			aa.set(i, 1);
166	jsr166	1.29	do {} while (!aa.weakCompareAndSet(i, 1, 2));
167			do {} while (!aa.weakCompareAndSet(i, 2, -4));
168	jsr166	1.25	assertEquals(-4, aa.get(i));
169	jsr166	1.29	do {} while (!aa.weakCompareAndSet(i, -4, 7));
170	jsr166	1.25	assertEquals(7, aa.get(i));
171	dl	1.1	}
172			}
173
174	dl	1.4	/**
175	jsr166	1.18	* getAndSet returns previous value and sets to given value at given index
176	dl	1.4	*/
177	jsr166	1.12	public void testGetAndSet() {
178	jsr166	1.25	AtomicLongArray aa = new AtomicLongArray(SIZE);
179			for (int i = 0; i < SIZE; i++) {
180			aa.set(i, 1);
181			assertEquals(1, aa.getAndSet(i, 0));
182			assertEquals(0, aa.getAndSet(i, -10));
183			assertEquals(-10, aa.getAndSet(i, 1));
184	dl	1.1	}
185			}
186
187	dl	1.4	/**
188	jsr166	1.18	* getAndAdd returns previous value and adds given value
189	dl	1.4	*/
190	jsr166	1.12	public void testGetAndAdd() {
191	jsr166	1.25	AtomicLongArray aa = new AtomicLongArray(SIZE);
192			for (int i = 0; i < SIZE; i++) {
193			aa.set(i, 1);
194			assertEquals(1, aa.getAndAdd(i, 2));
195			assertEquals(3, aa.get(i));
196			assertEquals(3, aa.getAndAdd(i, -4));
197			assertEquals(-1, aa.get(i));
198	dl	1.1	}
199			}
200
201	dl	1.4	/**
202	dl	1.5	* getAndDecrement returns previous value and decrements
203	dl	1.4	*/
204	jsr166	1.12	public void testGetAndDecrement() {
205	jsr166	1.25	AtomicLongArray aa = new AtomicLongArray(SIZE);
206			for (int i = 0; i < SIZE; i++) {
207			aa.set(i, 1);
208			assertEquals(1, aa.getAndDecrement(i));
209			assertEquals(0, aa.getAndDecrement(i));
210			assertEquals(-1, aa.getAndDecrement(i));
211	dl	1.1	}
212			}
213
214	dl	1.4	/**
215	dl	1.5	* getAndIncrement returns previous value and increments
216	dl	1.4	*/
217	jsr166	1.12	public void testGetAndIncrement() {
218	jsr166	1.25	AtomicLongArray aa = new AtomicLongArray(SIZE);
219			for (int i = 0; i < SIZE; i++) {
220			aa.set(i, 1);
221			assertEquals(1, aa.getAndIncrement(i));
222			assertEquals(2, aa.get(i));
223			aa.set(i, -2);
224			assertEquals(-2, aa.getAndIncrement(i));
225			assertEquals(-1, aa.getAndIncrement(i));
226			assertEquals(0, aa.getAndIncrement(i));
227			assertEquals(1, aa.get(i));
228	dl	1.1	}
229			}
230
231	dl	1.4	/**
232	jsr166	1.18	* addAndGet adds given value to current, and returns current value
233	dl	1.4	*/
234	dl	1.1	public void testAddAndGet() {
235	jsr166	1.25	AtomicLongArray aa = new AtomicLongArray(SIZE);
236			for (int i = 0; i < SIZE; i++) {
237			aa.set(i, 1);
238			assertEquals(3, aa.addAndGet(i, 2));
239			assertEquals(3, aa.get(i));
240			assertEquals(-1, aa.addAndGet(i, -4));
241			assertEquals(-1, aa.get(i));
242	dl	1.1	}
243			}
244
245	dl	1.4	/**
246	dl	1.5	* decrementAndGet decrements and returns current value
247	dl	1.4	*/
248	jsr166	1.12	public void testDecrementAndGet() {
249	jsr166	1.25	AtomicLongArray aa = new AtomicLongArray(SIZE);
250			for (int i = 0; i < SIZE; i++) {
251			aa.set(i, 1);
252			assertEquals(0, aa.decrementAndGet(i));
253			assertEquals(-1, aa.decrementAndGet(i));
254			assertEquals(-2, aa.decrementAndGet(i));
255			assertEquals(-2, aa.get(i));
256	dl	1.1	}
257			}
258
259	dl	1.4	/**
260	dl	1.5	* incrementAndGet increments and returns current value
261	dl	1.4	*/
262	dl	1.1	public void testIncrementAndGet() {
263	jsr166	1.25	AtomicLongArray aa = new AtomicLongArray(SIZE);
264			for (int i = 0; i < SIZE; i++) {
265			aa.set(i, 1);
266			assertEquals(2, aa.incrementAndGet(i));
267			assertEquals(2, aa.get(i));
268			aa.set(i, -2);
269			assertEquals(-1, aa.incrementAndGet(i));
270			assertEquals(0, aa.incrementAndGet(i));
271			assertEquals(1, aa.incrementAndGet(i));
272			assertEquals(1, aa.get(i));
273	dl	1.1	}
274			}
275	dl	1.2
276	jsr166	1.17	class Counter extends CheckedRunnable {
277	jsr166	1.25	final AtomicLongArray aa;
278	dl	1.3	volatile long counts;
279	jsr166	1.25	Counter(AtomicLongArray a) { aa = a; }
280	jsr166	1.17	public void realRun() {
281	dl	1.3	for (;;) {
282			boolean done = true;
283	jsr166	1.25	for (int i = 0; i < aa.length(); i++) {
284			long v = aa.get(i);
285	jsr166	1.17	assertTrue(v >= 0);
286	dl	1.3	if (v != 0) {
287			done = false;
288	jsr166	1.32	if (aa.compareAndSet(i, v, v - 1))
289	dl	1.3	++counts;
290			}
291			}
292			if (done)
293			break;
294			}
295			}
296			}
297
298	dl	1.4	/**
299	dl	1.5	* Multiple threads using same array of counters successfully
300			* update a number of times equal to total count
301	dl	1.4	*/
302	jsr166	1.13	public void testCountingInMultipleThreads() throws InterruptedException {
303	jsr166	1.25	final AtomicLongArray aa = new AtomicLongArray(SIZE);
304	jsr166	1.27	long countdown = 10000;
305	jsr166	1.25	for (int i = 0; i < SIZE; i++)
306	jsr166	1.27	aa.set(i, countdown);
307	jsr166	1.25	Counter c1 = new Counter(aa);
308			Counter c2 = new Counter(aa);
309	jsr166	1.13	Thread t1 = new Thread(c1);
310			Thread t2 = new Thread(c2);
311			t1.start();
312			t2.start();
313			t1.join();
314			t2.join();
315	jsr166	1.27	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	1.13	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	}