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root/jsr166/jsr166/src/test/tck/ArrayDequeTest.java

Comparing jsr166/src/test/tck/ArrayDequeTest.java (file contents):
Revision 1.17 by jsr166, Wed Nov 3 07:54:52 2010 UTC vs.
Revision 1.42 by jsr166, Sun Oct 16 22:13:15 2016 UTC

#	Line 1 | Line 1
1		/*
2		* 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
4	>	* http://creativecommons.org/publicdomain/zero/1.0/
5		*/
6
7	<	import junit.framework.*;
8	<	import java.io.BufferedInputStream;
9	<	import java.io.BufferedOutputStream;
10	<	import java.io.ByteArrayInputStream;
11	<	import java.io.ByteArrayOutputStream;
12	<	import java.io.ObjectInputStream;
13	<	import java.io.ObjectOutputStream;
14	<	import java.util.*;
7	>	import java.util.ArrayDeque;
8	>	import java.util.Arrays;
9	>	import java.util.Collection;
10	>	import java.util.Deque;
11	>	import java.util.Iterator;
12	>	import java.util.NoSuchElementException;
13	>	import java.util.Queue;
14	>	import java.util.Random;
15	>	import java.util.concurrent.ThreadLocalRandom;
16	>
17	>	import junit.framework.Test;
18	>	import junit.framework.TestSuite;
19
20		public class ArrayDequeTest extends JSR166TestCase {
21		public static void main(String[] args) {
22	<	junit.textui.TestRunner.run(suite());
22	>	main(suite(), args);
23		}
24
25		public static Test suite() {
26	<	return new TestSuite(ArrayDequeTest.class);
26	>	class Implementation implements CollectionImplementation {
27	>	public Class<?> klazz() { return ArrayDeque.class; }
28	>	public Collection emptyCollection() { return new ArrayDeque(); }
29	>	public Object makeElement(int i) { return i; }
30	>	public boolean isConcurrent() { return false; }
31	>	public boolean permitsNulls() { return false; }
32	>	}
33	>	return newTestSuite(ArrayDequeTest.class,
34	>	CollectionTest.testSuite(new Implementation()));
35		}
36
37		/**
38	<	* Create a deque of given size containing consecutive
39	<	* Integers 0 ... n.
40	<	*/
41	<	private ArrayDeque populatedDeque(int n) {
42	<	ArrayDeque q = new ArrayDeque();
38	>	* Returns a new deque of given size containing consecutive
39	>	* Integers 0 ... n - 1.
40	>	*/
41	>	private ArrayDeque<Integer> populatedDeque(int n) {
42	>	// Randomize various aspects of memory layout, including
43	>	// filled-to-capacity and wraparound.
44	>	final ArrayDeque<Integer> q;
45	>	ThreadLocalRandom rnd = ThreadLocalRandom.current();
46	>	switch (rnd.nextInt(6)) {
47	>	case 0: q = new ArrayDeque<Integer>(); break;
48	>	case 1: q = new ArrayDeque<Integer>(0); break;
49	>	case 2: q = new ArrayDeque<Integer>(1); break;
50	>	case 3: q = new ArrayDeque<Integer>(n - 1); break;
51	>	case 4: q = new ArrayDeque<Integer>(n); break;
52	>	case 5: q = new ArrayDeque<Integer>(n + 1); break;
53	>	default: throw new AssertionError();
54	>	}
55	>	switch (rnd.nextInt(3)) {
56	>	case 0:
57	>	q.addFirst(42);
58	>	assertEquals((Integer) 42, q.removeLast());
59	>	break;
60	>	case 1:
61	>	q.addLast(42);
62	>	assertEquals((Integer) 42, q.removeLast());
63	>	break;
64	>	case 2: /* do nothing */ break;
65	>	default: throw new AssertionError();
66	>	}
67		assertTrue(q.isEmpty());
68	<	for (int i = 0; i < n; ++i)
69	<	assertTrue(q.offerLast(new Integer(i)));
68	>	if (rnd.nextBoolean())
69	>	for (int i = 0; i < n; i++)
70	>	assertTrue(q.offerLast((Integer) i));
71	>	else
72	>	for (int i = n; --i >= 0; )
73	>	q.addFirst((Integer) i);
74		assertFalse(q.isEmpty());
75		assertEquals(n, q.size());
76	+	assertEquals((Integer) 0, q.peekFirst());
77	+	assertEquals((Integer) (n - 1), q.peekLast());
78		return q;
79		}
80
#	Line 48 | Line 90 | public class ArrayDequeTest extends JSR1
90		*/
91		public void testConstructor3() {
92		try {
93	<	ArrayDeque q = new ArrayDeque((Collection)null);
93	>	new ArrayDeque((Collection)null);
94		shouldThrow();
95		} catch (NullPointerException success) {}
96		}
#	Line 58 | Line 100 | public class ArrayDequeTest extends JSR1
100		*/
101		public void testConstructor4() {
102		try {
103	<	Integer[] ints = new Integer[SIZE];
62	<	ArrayDeque q = new ArrayDeque(Arrays.asList(ints));
103	>	new ArrayDeque(Arrays.asList(new Integer[SIZE]));
104		shouldThrow();
105		} catch (NullPointerException success) {}
106		}
#	Line 68 | Line 109 | public class ArrayDequeTest extends JSR1
109		* Initializing from Collection with some null elements throws NPE
110		*/
111		public void testConstructor5() {
112	+	Integer[] ints = new Integer[SIZE];
113	+	for (int i = 0; i < SIZE - 1; ++i)
114	+	ints[i] = new Integer(i);
115		try {
116	<	Integer[] ints = new Integer[SIZE];
73	<	for (int i = 0; i < SIZE-1; ++i)
74	<	ints[i] = new Integer(i);
75	<	ArrayDeque q = new ArrayDeque(Arrays.asList(ints));
116	>	new ArrayDeque(Arrays.asList(ints));
117		shouldThrow();
118		} catch (NullPointerException success) {}
119		}
#	Line 109 | Line 150 | public class ArrayDequeTest extends JSR1
150		public void testSize() {
151		ArrayDeque q = populatedDeque(SIZE);
152		for (int i = 0; i < SIZE; ++i) {
153	<	assertEquals(SIZE-i, q.size());
153	>	assertEquals(SIZE - i, q.size());
154		q.removeFirst();
155		}
156		for (int i = 0; i < SIZE; ++i) {
#	Line 122 | Line 163 | public class ArrayDequeTest extends JSR1
163		* push(null) throws NPE
164		*/
165		public void testPushNull() {
166	+	ArrayDeque q = new ArrayDeque(1);
167		try {
126	–	ArrayDeque q = new ArrayDeque(1);
168		q.push(null);
169		shouldThrow();
170		} catch (NullPointerException success) {}
#	Line 157 | Line 198 | public class ArrayDequeTest extends JSR1
198		* offer(null) throws NPE
199		*/
200		public void testOfferNull() {
201	+	ArrayDeque q = new ArrayDeque();
202		try {
161	–	ArrayDeque q = new ArrayDeque();
203		q.offer(null);
204		shouldThrow();
205		} catch (NullPointerException success) {}
#	Line 168 | Line 209 | public class ArrayDequeTest extends JSR1
209		* offerFirst(null) throws NPE
210		*/
211		public void testOfferFirstNull() {
212	+	ArrayDeque q = new ArrayDeque();
213		try {
172	–	ArrayDeque q = new ArrayDeque();
214		q.offerFirst(null);
215		shouldThrow();
216		} catch (NullPointerException success) {}
#	Line 179 | Line 220 | public class ArrayDequeTest extends JSR1
220		* offerLast(null) throws NPE
221		*/
222		public void testOfferLastNull() {
223	+	ArrayDeque q = new ArrayDeque();
224		try {
183	–	ArrayDeque q = new ArrayDeque();
225		q.offerLast(null);
226		shouldThrow();
227		} catch (NullPointerException success) {}
#	Line 223 | Line 264 | public class ArrayDequeTest extends JSR1
264		* add(null) throws NPE
265		*/
266		public void testAddNull() {
267	+	ArrayDeque q = new ArrayDeque();
268		try {
227	–	ArrayDeque q = new ArrayDeque();
269		q.add(null);
270		shouldThrow();
271		} catch (NullPointerException success) {}
#	Line 234 | Line 275 | public class ArrayDequeTest extends JSR1
275		* addFirst(null) throws NPE
276		*/
277		public void testAddFirstNull() {
278	+	ArrayDeque q = new ArrayDeque();
279		try {
238	–	ArrayDeque q = new ArrayDeque();
280		q.addFirst(null);
281		shouldThrow();
282		} catch (NullPointerException success) {}
#	Line 245 | Line 286 | public class ArrayDequeTest extends JSR1
286		* addLast(null) throws NPE
287		*/
288		public void testAddLastNull() {
289	+	ArrayDeque q = new ArrayDeque();
290		try {
249	–	ArrayDeque q = new ArrayDeque();
291		q.addLast(null);
292		shouldThrow();
293		} catch (NullPointerException success) {}
#	Line 289 | Line 330 | public class ArrayDequeTest extends JSR1
330		* addAll(null) throws NPE
331		*/
332		public void testAddAll1() {
333	+	ArrayDeque q = new ArrayDeque();
334		try {
293	–	ArrayDeque q = new ArrayDeque();
335		q.addAll(null);
336		shouldThrow();
337		} catch (NullPointerException success) {}
#	Line 300 | Line 341 | public class ArrayDequeTest extends JSR1
341		* addAll of a collection with null elements throws NPE
342		*/
343		public void testAddAll2() {
344	+	ArrayDeque q = new ArrayDeque();
345		try {
346	<	ArrayDeque q = new ArrayDeque();
305	<	Integer[] ints = new Integer[SIZE];
306	<	q.addAll(Arrays.asList(ints));
346	>	q.addAll(Arrays.asList(new Integer[SIZE]));
347		shouldThrow();
348		} catch (NullPointerException success) {}
349		}
#	Line 313 | Line 353 | public class ArrayDequeTest extends JSR1
353		* possibly adding some elements
354		*/
355		public void testAddAll3() {
356	+	ArrayDeque q = new ArrayDeque();
357	+	Integer[] ints = new Integer[SIZE];
358	+	for (int i = 0; i < SIZE - 1; ++i)
359	+	ints[i] = new Integer(i);
360		try {
317	–	ArrayDeque q = new ArrayDeque();
318	–	Integer[] ints = new Integer[SIZE];
319	–	for (int i = 0; i < SIZE-1; ++i)
320	–	ints[i] = new Integer(i);
361		q.addAll(Arrays.asList(ints));
362		shouldThrow();
363		} catch (NullPointerException success) {}
#	Line 354 | Line 394 | public class ArrayDequeTest extends JSR1
394		*/
395		public void testPollLast() {
396		ArrayDeque q = populatedDeque(SIZE);
397	<	for (int i = SIZE-1; i >= 0; --i) {
397	>	for (int i = SIZE - 1; i >= 0; --i) {
398		assertEquals(i, q.pollLast());
399		}
400		assertNull(q.pollLast());
#	Line 390 | Line 430 | public class ArrayDequeTest extends JSR1
430		*/
431		public void testRemoveElement() {
432		ArrayDeque q = populatedDeque(SIZE);
433	<	for (int i = 1; i < SIZE; i+=2) {
434	<	assertTrue(q.remove(new Integer(i)));
435	<	}
436	<	for (int i = 0; i < SIZE; i+=2) {
437	<	assertTrue(q.remove(new Integer(i)));
438	<	assertFalse(q.remove(new Integer(i+1)));
433	>	for (int i = 1; i < SIZE; i += 2) {
434	>	assertTrue(q.contains(i));
435	>	assertTrue(q.remove(i));
436	>	assertFalse(q.contains(i));
437	>	assertTrue(q.contains(i - 1));
438	>	}
439	>	for (int i = 0; i < SIZE; i += 2) {
440	>	assertTrue(q.contains(i));
441	>	assertTrue(q.remove(i));
442	>	assertFalse(q.contains(i));
443	>	assertFalse(q.remove(i + 1));
444	>	assertFalse(q.contains(i + 1));
445		}
446		assertTrue(q.isEmpty());
447		}
#	Line 433 | Line 479 | public class ArrayDequeTest extends JSR1
479		*/
480		public void testPeekLast() {
481		ArrayDeque q = populatedDeque(SIZE);
482	<	for (int i = SIZE-1; i >= 0; --i) {
482	>	for (int i = SIZE - 1; i >= 0; --i) {
483		assertEquals(i, q.peekLast());
484		assertEquals(i, q.pollLast());
485		assertTrue(q.peekLast() == null ||
#	Line 477 | Line 523 | public class ArrayDequeTest extends JSR1
523		*/
524		public void testLastElement() {
525		ArrayDeque q = populatedDeque(SIZE);
526	<	for (int i = SIZE-1; i >= 0; --i) {
526	>	for (int i = SIZE - 1; i >= 0; --i) {
527		assertEquals(i, q.getLast());
528		assertEquals(i, q.pollLast());
529		}
#	Line 488 | Line 534 | public class ArrayDequeTest extends JSR1
534		assertNull(q.peekLast());
535		}
536
491	–
537		/**
538		* removeFirst() removes first element, or throws NSEE if empty
539		*/
#	Line 524 | Line 569 | public class ArrayDequeTest extends JSR1
569		*/
570		public void testRemoveFirstOccurrence() {
571		ArrayDeque q = populatedDeque(SIZE);
572	<	for (int i = 1; i < SIZE; i+=2) {
572	>	assertFalse(q.removeFirstOccurrence(null));
573	>	for (int i = 1; i < SIZE; i += 2) {
574		assertTrue(q.removeFirstOccurrence(new Integer(i)));
575		}
576	<	for (int i = 0; i < SIZE; i+=2) {
576	>	for (int i = 0; i < SIZE; i += 2) {
577		assertTrue(q.removeFirstOccurrence(new Integer(i)));
578	<	assertFalse(q.removeFirstOccurrence(new Integer(i+1)));
578	>	assertFalse(q.removeFirstOccurrence(new Integer(i + 1)));
579		}
580		assertTrue(q.isEmpty());
581	+	assertFalse(q.removeFirstOccurrence(null));
582	+	assertFalse(q.removeFirstOccurrence(42));
583	+	q = new ArrayDeque();
584	+	assertFalse(q.removeFirstOccurrence(null));
585	+	assertFalse(q.removeFirstOccurrence(42));
586		}
587
588		/**
#	Line 539 | Line 590 | public class ArrayDequeTest extends JSR1
590		*/
591		public void testRemoveLastOccurrence() {
592		ArrayDeque q = populatedDeque(SIZE);
593	<	for (int i = 1; i < SIZE; i+=2) {
593	>	assertFalse(q.removeLastOccurrence(null));
594	>	for (int i = 1; i < SIZE; i += 2) {
595		assertTrue(q.removeLastOccurrence(new Integer(i)));
596		}
597	<	for (int i = 0; i < SIZE; i+=2) {
597	>	for (int i = 0; i < SIZE; i += 2) {
598		assertTrue(q.removeLastOccurrence(new Integer(i)));
599	<	assertFalse(q.removeLastOccurrence(new Integer(i+1)));
599	>	assertFalse(q.removeLastOccurrence(new Integer(i + 1)));
600		}
601		assertTrue(q.isEmpty());
602	+	assertFalse(q.removeLastOccurrence(null));
603	+	assertFalse(q.removeLastOccurrence(42));
604	+	q = new ArrayDeque();
605	+	assertFalse(q.removeLastOccurrence(null));
606	+	assertFalse(q.removeLastOccurrence(42));
607		}
608
609		/**
#	Line 599 | Line 656 | public class ArrayDequeTest extends JSR1
656		boolean changed = q.retainAll(p);
657		assertEquals(changed, (i > 0));
658		assertTrue(q.containsAll(p));
659	<	assertEquals(SIZE-i, q.size());
659	>	assertEquals(SIZE - i, q.size());
660		p.removeFirst();
661		}
662		}
#	Line 612 | Line 669 | public class ArrayDequeTest extends JSR1
669		ArrayDeque q = populatedDeque(SIZE);
670		ArrayDeque p = populatedDeque(i);
671		assertTrue(q.removeAll(p));
672	<	assertEquals(SIZE-i, q.size());
672	>	assertEquals(SIZE - i, q.size());
673		for (int j = 0; j < i; ++j) {
674		assertFalse(q.contains(p.removeFirst()));
675		}
676		}
677		}
678
679	+	void checkToArray(ArrayDeque q) {
680	+	int size = q.size();
681	+	Object[] o = q.toArray();
682	+	assertEquals(size, o.length);
683	+	Iterator it = q.iterator();
684	+	for (int i = 0; i < size; i++) {
685	+	Integer x = (Integer) it.next();
686	+	assertEquals((Integer)o[0] + i, (int) x);
687	+	assertSame(o[i], x);
688	+	}
689	+	}
690	+
691		/**
692	<	* toArray() contains all elements
692	>	* toArray() contains all elements in FIFO order
693		*/
694		public void testToArray() {
695	<	ArrayDeque q = populatedDeque(SIZE);
696	<	Object[] o = q.toArray();
697	<	Arrays.sort(o);
698	<	for (int i = 0; i < o.length; i++)
699	<	assertEquals(o[i], q.pollFirst());
695	>	ArrayDeque q = new ArrayDeque();
696	>	for (int i = 0; i < SIZE; i++) {
697	>	checkToArray(q);
698	>	q.addLast(i);
699	>	}
700	>	// Provoke wraparound
701	>	for (int i = 0; i < SIZE; i++) {
702	>	checkToArray(q);
703	>	assertEquals(i, q.poll());
704	>	q.addLast(SIZE + i);
705	>	}
706	>	for (int i = 0; i < SIZE; i++) {
707	>	checkToArray(q);
708	>	assertEquals(SIZE + i, q.poll());
709	>	}
710	>	}
711	>
712	>	void checkToArray2(ArrayDeque q) {
713	>	int size = q.size();
714	>	Integer[] a1 = (size == 0) ? null : new Integer[size - 1];
715	>	Integer[] a2 = new Integer[size];
716	>	Integer[] a3 = new Integer[size + 2];
717	>	if (size > 0) Arrays.fill(a1, 42);
718	>	Arrays.fill(a2, 42);
719	>	Arrays.fill(a3, 42);
720	>	Integer[] b1 = (size == 0) ? null : (Integer[]) q.toArray(a1);
721	>	Integer[] b2 = (Integer[]) q.toArray(a2);
722	>	Integer[] b3 = (Integer[]) q.toArray(a3);
723	>	assertSame(a2, b2);
724	>	assertSame(a3, b3);
725	>	Iterator it = q.iterator();
726	>	for (int i = 0; i < size; i++) {
727	>	Integer x = (Integer) it.next();
728	>	assertSame(b1[i], x);
729	>	assertEquals(b1[0] + i, (int) x);
730	>	assertSame(b2[i], x);
731	>	assertSame(b3[i], x);
732	>	}
733	>	assertNull(a3[size]);
734	>	assertEquals(42, (int) a3[size + 1]);
735	>	if (size > 0) {
736	>	assertNotSame(a1, b1);
737	>	assertEquals(size, b1.length);
738	>	for (int i = 0; i < a1.length; i++) {
739	>	assertEquals(42, (int) a1[i]);
740	>	}
741	>	}
742		}
743
744		/**
745	<	* toArray(a) contains all elements
745	>	* toArray(a) contains all elements in FIFO order
746		*/
747		public void testToArray2() {
748	<	ArrayDeque q = populatedDeque(SIZE);
749	<	Integer[] ints = new Integer[SIZE];
750	<	ints = (Integer[])q.toArray(ints);
751	<	Arrays.sort(ints);
752	<	for (int i = 0; i < ints.length; i++)
753	<	assertEquals(ints[i], q.pollFirst());
748	>	ArrayDeque q = new ArrayDeque();
749	>	for (int i = 0; i < SIZE; i++) {
750	>	checkToArray2(q);
751	>	q.addLast(i);
752	>	}
753	>	// Provoke wraparound
754	>	for (int i = 0; i < SIZE; i++) {
755	>	checkToArray2(q);
756	>	assertEquals(i, q.poll());
757	>	q.addLast(SIZE + i);
758	>	}
759	>	for (int i = 0; i < SIZE; i++) {
760	>	checkToArray2(q);
761	>	assertEquals(SIZE + i, q.poll());
762	>	}
763		}
764
765		/**
766	<	* toArray(null) throws NPE
766	>	* toArray(null) throws NullPointerException
767		*/
768	<	public void testToArray_BadArg() {
768	>	public void testToArray_NullArg() {
769		ArrayDeque l = new ArrayDeque();
770		l.add(new Object());
771		try {
772	<	Object o[] = l.toArray(null);
772	>	l.toArray(null);
773		shouldThrow();
774		} catch (NullPointerException success) {}
775		}
#	Line 671 | Line 791 | public class ArrayDequeTest extends JSR1
791		*/
792		public void testIterator() {
793		ArrayDeque q = populatedDeque(SIZE);
674	–	int i = 0;
794		Iterator it = q.iterator();
795	<	while (it.hasNext()) {
795	>	int i;
796	>	for (i = 0; it.hasNext(); i++)
797		assertTrue(q.contains(it.next()));
678	–	++i;
679	–	}
798		assertEquals(i, SIZE);
799	+	assertIteratorExhausted(it);
800	+	}
801	+
802	+	/**
803	+	* iterator of empty collection has no elements
804	+	*/
805	+	public void testEmptyIterator() {
806	+	Deque c = new ArrayDeque();
807	+	assertIteratorExhausted(c.iterator());
808	+	assertIteratorExhausted(c.descendingIterator());
809		}
810
811		/**
#	Line 704 | Line 832 | public class ArrayDequeTest extends JSR1
832		final Random rng = new Random();
833		for (int iters = 0; iters < 100; ++iters) {
834		int max = rng.nextInt(5) + 2;
835	<	int split = rng.nextInt(max-1) + 1;
835	>	int split = rng.nextInt(max - 1) + 1;
836		for (int j = 1; j <= max; ++j)
837		q.add(new Integer(j));
838		Iterator it = q.iterator();
839		for (int j = 1; j <= split; ++j)
840		assertEquals(it.next(), new Integer(j));
841		it.remove();
842	<	assertEquals(it.next(), new Integer(split+1));
842	>	assertEquals(it.next(), new Integer(split + 1));
843		for (int j = 1; j <= split; ++j)
844		q.remove(new Integer(j));
845		it = q.iterator();
846	<	for (int j = split+1; j <= max; ++j) {
846	>	for (int j = split + 1; j <= max; ++j) {
847		assertEquals(it.next(), new Integer(j));
848		it.remove();
849		}
#	Line 772 | Line 900 | public class ArrayDequeTest extends JSR1
900		final Random rng = new Random();
901		for (int iters = 0; iters < 100; ++iters) {
902		int max = rng.nextInt(5) + 2;
903	<	int split = rng.nextInt(max-1) + 1;
903	>	int split = rng.nextInt(max - 1) + 1;
904		for (int j = max; j >= 1; --j)
905		q.add(new Integer(j));
906		Iterator it = q.descendingIterator();
907		for (int j = 1; j <= split; ++j)
908		assertEquals(it.next(), new Integer(j));
909		it.remove();
910	<	assertEquals(it.next(), new Integer(split+1));
910	>	assertEquals(it.next(), new Integer(split + 1));
911		for (int j = 1; j <= split; ++j)
912		q.remove(new Integer(j));
913		it = q.descendingIterator();
914	<	for (int j = split+1; j <= max; ++j) {
914	>	for (int j = split + 1; j <= max; ++j) {
915		assertEquals(it.next(), new Integer(j));
916		it.remove();
917		}
#	Line 792 | Line 920 | public class ArrayDequeTest extends JSR1
920		}
921		}
922
795	–
923		/**
924		* toString() contains toStrings of elements
925		*/
#	Line 800 | Line 927 | public class ArrayDequeTest extends JSR1
927		ArrayDeque q = populatedDeque(SIZE);
928		String s = q.toString();
929		for (int i = 0; i < SIZE; ++i) {
930	<	assertTrue(s.indexOf(String.valueOf(i)) >= 0);
930	>	assertTrue(s.contains(String.valueOf(i)));
931		}
932		}
933
#	Line 808 | Line 935 | public class ArrayDequeTest extends JSR1
935		* A deserialized serialized deque has same elements in same order
936		*/
937		public void testSerialization() throws Exception {
938	<	ArrayDeque q = populatedDeque(SIZE);
939	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
940	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
941	<	out.writeObject(q);
942	<	out.close();
943	<
944	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
945	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
946	<	ArrayDeque r = (ArrayDeque)in.readObject();
947	<	assertEquals(q.size(), r.size());
948	<	while (!q.isEmpty())
949	<	assertEquals(q.remove(), r.remove());
938	>	Queue x = populatedDeque(SIZE);
939	>	Queue y = serialClone(x);
940	>
941	>	assertNotSame(y, x);
942	>	assertEquals(x.size(), y.size());
943	>	assertEquals(x.toString(), y.toString());
944	>	assertTrue(Arrays.equals(x.toArray(), y.toArray()));
945	>	while (!x.isEmpty()) {
946	>	assertFalse(y.isEmpty());
947	>	assertEquals(x.remove(), y.remove());
948	>	}
949	>	assertTrue(y.isEmpty());
950	>	}
951	>
952	>	/**
953	>	* remove(null), contains(null) always return false
954	>	*/
955	>	public void testNeverContainsNull() {
956	>	Deque<?>[] qs = {
957	>	new ArrayDeque<Object>(),
958	>	populatedDeque(2),
959	>	};
960	>
961	>	for (Deque<?> q : qs) {
962	>	assertFalse(q.contains(null));
963	>	assertFalse(q.remove(null));
964	>	assertFalse(q.removeFirstOccurrence(null));
965	>	assertFalse(q.removeLastOccurrence(null));
966	>	}
967		}
968
969		}

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