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/licenses/publicdomain
 * Other contributors include Andrew Wright, Jeffrey Hayes,
 * Pat Fisher, Mike Judd.
 */

import junit.framework.*;
import java.util.concurrent.atomic.*;
import java.io.*;
import java.util.*;

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

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

    /**
     * constructor with null array throws NPE
     */
    public void testConstructor2NPE() {
        try {
            long[] a = null;
            AtomicLongArray ai = 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 ai = new AtomicLongArray(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() {
        AtomicLongArray ai = new AtomicLongArray(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() {
        AtomicLongArray ai = new AtomicLongArray(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() {
        AtomicLongArray ai = new AtomicLongArray(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() {
        AtomicLongArray ai = new AtomicLongArray(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));
            assertFalse((7 == 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 InterruptedException {
        final AtomicLongArray a = new AtomicLongArray(1);
        a.set(0, 1);
        Thread t = new Thread(new Runnable() {
                public void run() {
                    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(a.get(0), 3);
    }

    /**
     * repeated weakCompareAndSet succeeds in changing value when equal
     * to expected
     */
    public void testWeakCompareAndSet() {
        AtomicLongArray ai = new AtomicLongArray(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() {
        AtomicLongArray ai = new AtomicLongArray(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() {
        AtomicLongArray ai = new AtomicLongArray(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() {
        AtomicLongArray ai = new AtomicLongArray(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() {
        AtomicLongArray ai = new AtomicLongArray(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() {
        AtomicLongArray ai = new AtomicLongArray(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() {
        AtomicLongArray ai = new AtomicLongArray(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() {
        AtomicLongArray ai = new AtomicLongArray(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 long COUNTDOWN = 100000;

    class Counter implements Runnable {
        final AtomicLongArray ai;
        volatile long counts;
        Counter(AtomicLongArray a) { ai = a; }
        public void run() {
            for (;;) {
                boolean done = true;
                for (int i = 0; i < ai.length(); ++i) {
                    long v = ai.get(i);
                    threadAssertTrue(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 AtomicLongArray ai = new AtomicLongArray(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 {
        AtomicLongArray l = new AtomicLongArray(SIZE);
        for (int i = 0; i < SIZE; ++i)
            l.set(i, -i);

        ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
        ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
        out.writeObject(l);
        out.close();

        ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
        ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
        AtomicLongArray r = (AtomicLongArray) in.readObject();
        for (int i = 0; i < SIZE; ++i) {
            assertEquals(l.get(i), r.get(i));
        }
    }

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


}
Revision:	1.13
Committed:	Tue Nov 17 02:48:16 2009 UTC (14 years, 5 months ago) by jsr166
Branch:	MAIN
Changes since 1.12:	+37 -48 lines
Log Message:	clean up exception handling; add missing shouldThrows
#	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			* http://creativecommons.org/licenses/publicdomain
5	jsr166	1.10	* Other contributors include Andrew Wright, Jeffrey Hayes,
6			* Pat Fisher, Mike Judd.
7	dl	1.1	*/
8
9			import junit.framework.*;
10			import java.util.concurrent.atomic.*;
11	dl	1.2	import java.io.*;
12	dl	1.8	import java.util.*;
13	dl	1.1
14	dl	1.3	public class AtomicLongArrayTest extends JSR166TestCase {
15	dl	1.1	public static void main (String[] args) {
16			junit.textui.TestRunner.run (suite());
17			}
18			public static Test suite() {
19			return new TestSuite(AtomicLongArrayTest.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	jsr166	1.12	public void testConstructor() {
26	dl	1.3	AtomicLongArray ai = new AtomicLongArray(SIZE);
27	jsr166	1.10	for (int i = 0; i < SIZE; ++i)
28	dl	1.1	assertEquals(0,ai.get(i));
29			}
30
31	dl	1.4	/**
32	dl	1.7	* constructor with null array throws NPE
33			*/
34			public void testConstructor2NPE() {
35			try {
36			long[] a = null;
37			AtomicLongArray ai = new AtomicLongArray(a);
38	jsr166	1.13	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			long[] a = { 17L, 3L, -42L, 99L, -7L};
47			AtomicLongArray ai = new AtomicLongArray(a);
48			assertEquals(a.length, ai.length());
49	jsr166	1.10	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	1.12	public void testIndexing() {
57	dl	1.5	AtomicLongArray ai = new AtomicLongArray(SIZE);
58			try {
59			ai.get(SIZE);
60	jsr166	1.13	shouldThrow();
61	jsr166	1.12	} catch (IndexOutOfBoundsException success) {
62	dl	1.5	}
63			try {
64			ai.get(-1);
65	jsr166	1.13	shouldThrow();
66	jsr166	1.12	} catch (IndexOutOfBoundsException success) {
67	dl	1.5	}
68			try {
69			ai.set(SIZE, 0);
70	jsr166	1.13	shouldThrow();
71	jsr166	1.12	} catch (IndexOutOfBoundsException success) {
72	dl	1.5	}
73			try {
74			ai.set(-1, 0);
75	jsr166	1.13	shouldThrow();
76	jsr166	1.12	} catch (IndexOutOfBoundsException success) {
77	dl	1.5	}
78			}
79
80			/**
81			* get returns the last value set at index
82	dl	1.4	*/
83	jsr166	1.12	public void testGetSet() {
84	jsr166	1.10	AtomicLongArray ai = new AtomicLongArray(SIZE);
85	dl	1.3	for (int i = 0; i < SIZE; ++i) {
86	dl	1.1	ai.set(i, 1);
87			assertEquals(1,ai.get(i));
88			ai.set(i, 2);
89			assertEquals(2,ai.get(i));
90			ai.set(i, -3);
91			assertEquals(-3,ai.get(i));
92			}
93			}
94
95	dl	1.4	/**
96	dl	1.9	* get returns the last value lazySet at index by same thread
97			*/
98	jsr166	1.12	public void testGetLazySet() {
99	jsr166	1.10	AtomicLongArray ai = new AtomicLongArray(SIZE);
100	dl	1.9	for (int i = 0; i < SIZE; ++i) {
101			ai.lazySet(i, 1);
102			assertEquals(1,ai.get(i));
103			ai.lazySet(i, 2);
104			assertEquals(2,ai.get(i));
105			ai.lazySet(i, -3);
106			assertEquals(-3,ai.get(i));
107			}
108			}
109
110			/**
111	dl	1.5	* compareAndSet succeeds in changing value if equal to expected else fails
112	dl	1.4	*/
113	jsr166	1.12	public void testCompareAndSet() {
114	jsr166	1.10	AtomicLongArray ai = new AtomicLongArray(SIZE);
115	dl	1.3	for (int i = 0; i < SIZE; ++i) {
116	dl	1.1	ai.set(i, 1);
117			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			assertFalse((7 == ai.get(i)));
122			assertTrue(ai.compareAndSet(i, -4,7));
123			assertEquals(7,ai.get(i));
124			}
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	1.13	public void testCompareAndSetInMultipleThreads() throws InterruptedException {
132	dl	1.5	final AtomicLongArray a = new AtomicLongArray(1);
133			a.set(0, 1);
134			Thread t = new Thread(new Runnable() {
135			public void run() {
136	jsr166	1.11	while (!a.compareAndSet(0, 2, 3)) Thread.yield();
137	dl	1.5	}});
138	jsr166	1.13
139			t.start();
140			assertTrue(a.compareAndSet(0, 1, 2));
141			t.join(LONG_DELAY_MS);
142			assertFalse(t.isAlive());
143			assertEquals(a.get(0), 3);
144	dl	1.5	}
145
146			/**
147			* repeated weakCompareAndSet succeeds in changing value when equal
148	jsr166	1.10	* to expected
149	dl	1.4	*/
150	jsr166	1.12	public void testWeakCompareAndSet() {
151	jsr166	1.10	AtomicLongArray ai = new AtomicLongArray(SIZE);
152	dl	1.3	for (int i = 0; i < SIZE; ++i) {
153	dl	1.1	ai.set(i, 1);
154	jsr166	1.11	while (!ai.weakCompareAndSet(i, 1,2));
155			while (!ai.weakCompareAndSet(i, 2,-4));
156	dl	1.1	assertEquals(-4,ai.get(i));
157	jsr166	1.11	while (!ai.weakCompareAndSet(i, -4,7));
158	dl	1.1	assertEquals(7,ai.get(i));
159			}
160			}
161
162	dl	1.4	/**
163	dl	1.5	* getAndSet returns previous value and sets to given value at given index
164	dl	1.4	*/
165	jsr166	1.12	public void testGetAndSet() {
166	jsr166	1.10	AtomicLongArray ai = new AtomicLongArray(SIZE);
167	dl	1.3	for (int i = 0; i < SIZE; ++i) {
168	dl	1.1	ai.set(i, 1);
169			assertEquals(1,ai.getAndSet(i,0));
170			assertEquals(0,ai.getAndSet(i,-10));
171			assertEquals(-10,ai.getAndSet(i,1));
172			}
173			}
174
175	dl	1.4	/**
176	dl	1.5	* getAndAdd returns previous value and adds given value
177	dl	1.4	*/
178	jsr166	1.12	public void testGetAndAdd() {
179	jsr166	1.10	AtomicLongArray ai = new AtomicLongArray(SIZE);
180	dl	1.3	for (int i = 0; i < SIZE; ++i) {
181	dl	1.1	ai.set(i, 1);
182			assertEquals(1,ai.getAndAdd(i,2));
183			assertEquals(3,ai.get(i));
184			assertEquals(3,ai.getAndAdd(i,-4));
185			assertEquals(-1,ai.get(i));
186			}
187			}
188
189	dl	1.4	/**
190	dl	1.5	* getAndDecrement returns previous value and decrements
191	dl	1.4	*/
192	jsr166	1.12	public void testGetAndDecrement() {
193	jsr166	1.10	AtomicLongArray ai = new AtomicLongArray(SIZE);
194	dl	1.3	for (int i = 0; i < SIZE; ++i) {
195	dl	1.1	ai.set(i, 1);
196			assertEquals(1,ai.getAndDecrement(i));
197			assertEquals(0,ai.getAndDecrement(i));
198			assertEquals(-1,ai.getAndDecrement(i));
199			}
200			}
201
202	dl	1.4	/**
203	dl	1.5	* getAndIncrement returns previous value and increments
204	dl	1.4	*/
205	jsr166	1.12	public void testGetAndIncrement() {
206	jsr166	1.10	AtomicLongArray ai = new AtomicLongArray(SIZE);
207	dl	1.3	for (int i = 0; i < SIZE; ++i) {
208	dl	1.1	ai.set(i, 1);
209			assertEquals(1,ai.getAndIncrement(i));
210			assertEquals(2,ai.get(i));
211			ai.set(i,-2);
212			assertEquals(-2,ai.getAndIncrement(i));
213			assertEquals(-1,ai.getAndIncrement(i));
214			assertEquals(0,ai.getAndIncrement(i));
215			assertEquals(1,ai.get(i));
216			}
217			}
218
219	dl	1.4	/**
220	dl	1.5	* addAndGet adds given value to current, and returns current value
221	dl	1.4	*/
222	dl	1.1	public void testAddAndGet() {
223	jsr166	1.10	AtomicLongArray ai = new AtomicLongArray(SIZE);
224	dl	1.3	for (int i = 0; i < SIZE; ++i) {
225	dl	1.1	ai.set(i, 1);
226			assertEquals(3,ai.addAndGet(i,2));
227			assertEquals(3,ai.get(i));
228			assertEquals(-1,ai.addAndGet(i,-4));
229			assertEquals(-1,ai.get(i));
230			}
231			}
232
233	dl	1.4	/**
234	dl	1.5	* decrementAndGet decrements and returns current value
235	dl	1.4	*/
236	jsr166	1.12	public void testDecrementAndGet() {
237	jsr166	1.10	AtomicLongArray ai = new AtomicLongArray(SIZE);
238	dl	1.3	for (int i = 0; i < SIZE; ++i) {
239	dl	1.1	ai.set(i, 1);
240			assertEquals(0,ai.decrementAndGet(i));
241			assertEquals(-1,ai.decrementAndGet(i));
242			assertEquals(-2,ai.decrementAndGet(i));
243			assertEquals(-2,ai.get(i));
244			}
245			}
246
247	dl	1.4	/**
248	dl	1.5	* incrementAndGet increments and returns current value
249	dl	1.4	*/
250	dl	1.1	public void testIncrementAndGet() {
251	jsr166	1.10	AtomicLongArray ai = new AtomicLongArray(SIZE);
252	dl	1.3	for (int i = 0; i < SIZE; ++i) {
253	dl	1.1	ai.set(i, 1);
254			assertEquals(2,ai.incrementAndGet(i));
255			assertEquals(2,ai.get(i));
256			ai.set(i, -2);
257			assertEquals(-1,ai.incrementAndGet(i));
258			assertEquals(0,ai.incrementAndGet(i));
259			assertEquals(1,ai.incrementAndGet(i));
260			assertEquals(1,ai.get(i));
261			}
262			}
263	dl	1.2
264	dl	1.3	static final long COUNTDOWN = 100000;
265	jsr166	1.10
266	dl	1.3	class Counter implements Runnable {
267			final AtomicLongArray ai;
268			volatile long counts;
269			Counter(AtomicLongArray a) { ai = a; }
270			public void run() {
271			for (;;) {
272			boolean done = true;
273			for (int i = 0; i < ai.length(); ++i) {
274			long v = ai.get(i);
275			threadAssertTrue(v >= 0);
276			if (v != 0) {
277			done = false;
278			if (ai.compareAndSet(i, v, v-1))
279			++counts;
280			}
281			}
282			if (done)
283			break;
284			}
285			}
286			}
287
288	dl	1.4	/**
289	dl	1.5	* Multiple threads using same array of counters successfully
290			* update a number of times equal to total count
291	dl	1.4	*/
292	jsr166	1.13	public void testCountingInMultipleThreads() throws InterruptedException {
293			final AtomicLongArray ai = new AtomicLongArray(SIZE);
294			for (int i = 0; i < SIZE; ++i)
295			ai.set(i, COUNTDOWN);
296			Counter c1 = new Counter(ai);
297			Counter c2 = new Counter(ai);
298			Thread t1 = new Thread(c1);
299			Thread t2 = new Thread(c2);
300			t1.start();
301			t2.start();
302			t1.join();
303			t2.join();
304			assertEquals(c1.counts+c2.counts, SIZE * COUNTDOWN);
305	dl	1.3	}
306
307	dl	1.4	/**
308	dl	1.5	* a deserialized serialized array holds same values
309	dl	1.4	*/
310	jsr166	1.13	public void testSerialization() throws Exception {
311	jsr166	1.10	AtomicLongArray l = new AtomicLongArray(SIZE);
312			for (int i = 0; i < SIZE; ++i)
313	dl	1.2	l.set(i, -i);
314
315	jsr166	1.13	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
316			ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
317			out.writeObject(l);
318			out.close();
319
320			ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
321			ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
322			AtomicLongArray r = (AtomicLongArray) in.readObject();
323			for (int i = 0; i < SIZE; ++i) {
324			assertEquals(l.get(i), r.get(i));
325	dl	1.2	}
326	dl	1.8	}
327
328			/**
329			* toString returns current value.
330	jsr166	1.10	*/
331	dl	1.8	public void testToString() {
332			long[] a = { 17, 3, -42, 99, -7};
333			AtomicLongArray ai = new AtomicLongArray(a);
334			assertEquals(Arrays.toString(a), ai.toString());
335	dl	1.2	}
336
337	dl	1.1
338			}