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

Comparing jsr166/src/test/tck/ArrayDequeTest.java (file contents):
Revision 1.20 by jsr166, Fri Nov 5 00:17:22 2010 UTC vs.
Revision 1.51 by jsr166, Tue Oct 25 01:32:55 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
2	>	* Written by Doug Lea and Martin Buchholz with assistance from
3	>	* members of JCP JSR-166 Expert Group and released to the public
4	>	* domain, as explained at
5	>	* http://creativecommons.org/publicdomain/zero/1.0/
6		*/
7
8	<	import junit.framework.*;
9	<	import java.io.BufferedInputStream;
10	<	import java.io.BufferedOutputStream;
11	<	import java.io.ByteArrayInputStream;
12	<	import java.io.ByteArrayOutputStream;
13	<	import java.io.ObjectInputStream;
14	<	import java.io.ObjectOutputStream;
15	<	import java.util.*;
8	>	import java.util.ArrayDeque;
9	>	import java.util.Arrays;
10	>	import java.util.Collection;
11	>	import java.util.Collections;
12	>	import java.util.Deque;
13	>	import java.util.Iterator;
14	>	import java.util.NoSuchElementException;
15	>	import java.util.Queue;
16	>	import java.util.Random;
17	>	import java.util.concurrent.ThreadLocalRandom;
18	>
19	>	import junit.framework.Test;
20	>	import junit.framework.TestSuite;
21
22		public class ArrayDequeTest extends JSR166TestCase {
23		public static void main(String[] args) {
24	<	junit.textui.TestRunner.run(suite());
24	>	main(suite(), args);
25		}
26
27		public static Test suite() {
28	<	return new TestSuite(ArrayDequeTest.class);
28	>	class Implementation implements CollectionImplementation {
29	>	public Class<?> klazz() { return ArrayDeque.class; }
30	>	public Collection emptyCollection() { return populatedDeque(0); }
31	>	public Object makeElement(int i) { return i; }
32	>	public boolean isConcurrent() { return false; }
33	>	public boolean permitsNulls() { return false; }
34	>	}
35	>	return newTestSuite(ArrayDequeTest.class,
36	>	CollectionTest.testSuite(new Implementation()));
37		}
38
39		/**
40	<	* Create a deque of given size containing consecutive
41	<	* Integers 0 ... n.
42	<	*/
43	<	private ArrayDeque<Integer> populatedDeque(int n) {
44	<	ArrayDeque<Integer> q = new ArrayDeque<Integer>();
40	>	* Returns a new deque of given size containing consecutive
41	>	* Integers 0 ... n - 1.
42	>	*/
43	>	private static ArrayDeque<Integer> populatedDeque(int n) {
44	>	// Randomize various aspects of memory layout, including
45	>	// filled-to-capacity and wraparound.
46	>	final ArrayDeque<Integer> q;
47	>	ThreadLocalRandom rnd = ThreadLocalRandom.current();
48	>	switch (rnd.nextInt(6)) {
49	>	case 0: q = new ArrayDeque<Integer>();      break;
50	>	case 1: q = new ArrayDeque<Integer>(0);     break;
51	>	case 2: q = new ArrayDeque<Integer>(1);     break;
52	>	case 3: q = new ArrayDeque<Integer>(Math.max(0, n - 1)); break;
53	>	case 4: q = new ArrayDeque<Integer>(n);     break;
54	>	case 5: q = new ArrayDeque<Integer>(n + 1); break;
55	>	default: throw new AssertionError();
56	>	}
57	>	switch (rnd.nextInt(3)) {
58	>	case 0:
59	>	q.addFirst(42);
60	>	assertEquals((Integer) 42, q.removeLast());
61	>	break;
62	>	case 1:
63	>	q.addLast(42);
64	>	assertEquals((Integer) 42, q.removeFirst());
65	>	break;
66	>	case 2: /* do nothing */ break;
67	>	default: throw new AssertionError();
68	>	}
69		assertTrue(q.isEmpty());
70	<	for (int i = 0; i < n; ++i)
71	<	assertTrue(q.offerLast(new Integer(i)));
72	<	assertFalse(q.isEmpty());
70	>	if (rnd.nextBoolean())
71	>	for (int i = 0; i < n; i++)
72	>	assertTrue(q.offerLast((Integer) i));
73	>	else
74	>	for (int i = n; --i >= 0; )
75	>	q.addFirst((Integer) i);
76		assertEquals(n, q.size());
77	+	if (n > 0) {
78	+	assertFalse(q.isEmpty());
79	+	assertEquals((Integer) 0, q.peekFirst());
80	+	assertEquals((Integer) (n - 1), q.peekLast());
81	+	}
82		return q;
83		}
84
#	Line 48 | Line 94 | public class ArrayDequeTest extends JSR1
94		*/
95		public void testConstructor3() {
96		try {
97	<	ArrayDeque q = new ArrayDeque((Collection)null);
97	>	new ArrayDeque((Collection)null);
98		shouldThrow();
99		} catch (NullPointerException success) {}
100		}
#	Line 58 | Line 104 | public class ArrayDequeTest extends JSR1
104		*/
105		public void testConstructor4() {
106		try {
107	<	Integer[] ints = new Integer[SIZE];
62	<	ArrayDeque q = new ArrayDeque(Arrays.asList(ints));
107	>	new ArrayDeque(Arrays.asList(new Integer[SIZE]));
108		shouldThrow();
109		} catch (NullPointerException success) {}
110		}
#	Line 68 | Line 113 | public class ArrayDequeTest extends JSR1
113		* Initializing from Collection with some null elements throws NPE
114		*/
115		public void testConstructor5() {
116	+	Integer[] ints = new Integer[SIZE];
117	+	for (int i = 0; i < SIZE - 1; ++i)
118	+	ints[i] = new Integer(i);
119		try {
120	<	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));
120	>	new ArrayDeque(Arrays.asList(ints));
121		shouldThrow();
122		} catch (NullPointerException success) {}
123		}
#	Line 109 | Line 154 | public class ArrayDequeTest extends JSR1
154		public void testSize() {
155		ArrayDeque q = populatedDeque(SIZE);
156		for (int i = 0; i < SIZE; ++i) {
157	<	assertEquals(SIZE-i, q.size());
157	>	assertEquals(SIZE - i, q.size());
158		q.removeFirst();
159		}
160		for (int i = 0; i < SIZE; ++i) {
#	Line 122 | Line 167 | public class ArrayDequeTest extends JSR1
167		* push(null) throws NPE
168		*/
169		public void testPushNull() {
170	+	ArrayDeque q = new ArrayDeque(1);
171		try {
126	–	ArrayDeque q = new ArrayDeque(1);
172		q.push(null);
173		shouldThrow();
174		} catch (NullPointerException success) {}
#	Line 157 | Line 202 | public class ArrayDequeTest extends JSR1
202		* offer(null) throws NPE
203		*/
204		public void testOfferNull() {
205	+	ArrayDeque q = new ArrayDeque();
206		try {
161	–	ArrayDeque q = new ArrayDeque();
207		q.offer(null);
208		shouldThrow();
209		} catch (NullPointerException success) {}
#	Line 168 | Line 213 | public class ArrayDequeTest extends JSR1
213		* offerFirst(null) throws NPE
214		*/
215		public void testOfferFirstNull() {
216	+	ArrayDeque q = new ArrayDeque();
217		try {
172	–	ArrayDeque q = new ArrayDeque();
218		q.offerFirst(null);
219		shouldThrow();
220		} catch (NullPointerException success) {}
#	Line 179 | Line 224 | public class ArrayDequeTest extends JSR1
224		* offerLast(null) throws NPE
225		*/
226		public void testOfferLastNull() {
227	+	ArrayDeque q = new ArrayDeque();
228		try {
183	–	ArrayDeque q = new ArrayDeque();
229		q.offerLast(null);
230		shouldThrow();
231		} catch (NullPointerException success) {}
#	Line 223 | Line 268 | public class ArrayDequeTest extends JSR1
268		* add(null) throws NPE
269		*/
270		public void testAddNull() {
271	+	ArrayDeque q = new ArrayDeque();
272		try {
227	–	ArrayDeque q = new ArrayDeque();
273		q.add(null);
274		shouldThrow();
275		} catch (NullPointerException success) {}
#	Line 234 | Line 279 | public class ArrayDequeTest extends JSR1
279		* addFirst(null) throws NPE
280		*/
281		public void testAddFirstNull() {
282	+	ArrayDeque q = new ArrayDeque();
283		try {
238	–	ArrayDeque q = new ArrayDeque();
284		q.addFirst(null);
285		shouldThrow();
286		} catch (NullPointerException success) {}
#	Line 245 | Line 290 | public class ArrayDequeTest extends JSR1
290		* addLast(null) throws NPE
291		*/
292		public void testAddLastNull() {
293	+	ArrayDeque q = new ArrayDeque();
294		try {
249	–	ArrayDeque q = new ArrayDeque();
295		q.addLast(null);
296		shouldThrow();
297		} catch (NullPointerException success) {}
#	Line 289 | Line 334 | public class ArrayDequeTest extends JSR1
334		* addAll(null) throws NPE
335		*/
336		public void testAddAll1() {
337	+	ArrayDeque q = new ArrayDeque();
338		try {
293	–	ArrayDeque q = new ArrayDeque();
339		q.addAll(null);
340		shouldThrow();
341		} catch (NullPointerException success) {}
#	Line 300 | Line 345 | public class ArrayDequeTest extends JSR1
345		* addAll of a collection with null elements throws NPE
346		*/
347		public void testAddAll2() {
348	+	ArrayDeque q = new ArrayDeque();
349		try {
350	<	ArrayDeque q = new ArrayDeque();
305	<	Integer[] ints = new Integer[SIZE];
306	<	q.addAll(Arrays.asList(ints));
350	>	q.addAll(Arrays.asList(new Integer[SIZE]));
351		shouldThrow();
352		} catch (NullPointerException success) {}
353		}
#	Line 313 | Line 357 | public class ArrayDequeTest extends JSR1
357		* possibly adding some elements
358		*/
359		public void testAddAll3() {
360	+	ArrayDeque q = new ArrayDeque();
361	+	Integer[] ints = new Integer[SIZE];
362	+	for (int i = 0; i < SIZE - 1; ++i)
363	+	ints[i] = new Integer(i);
364		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);
365		q.addAll(Arrays.asList(ints));
366		shouldThrow();
367		} catch (NullPointerException success) {}
#	Line 354 | Line 398 | public class ArrayDequeTest extends JSR1
398		*/
399		public void testPollLast() {
400		ArrayDeque q = populatedDeque(SIZE);
401	<	for (int i = SIZE-1; i >= 0; --i) {
401	>	for (int i = SIZE - 1; i >= 0; --i) {
402		assertEquals(i, q.pollLast());
403		}
404		assertNull(q.pollLast());
#	Line 390 | Line 434 | public class ArrayDequeTest extends JSR1
434		*/
435		public void testRemoveElement() {
436		ArrayDeque q = populatedDeque(SIZE);
437	<	for (int i = 1; i < SIZE; i+=2) {
438	<	assertTrue(q.remove(new Integer(i)));
439	<	}
440	<	for (int i = 0; i < SIZE; i+=2) {
441	<	assertTrue(q.remove(new Integer(i)));
442	<	assertFalse(q.remove(new Integer(i+1)));
437	>	for (int i = 1; i < SIZE; i += 2) {
438	>	assertTrue(q.contains(i));
439	>	assertTrue(q.remove(i));
440	>	assertFalse(q.contains(i));
441	>	assertTrue(q.contains(i - 1));
442	>	}
443	>	for (int i = 0; i < SIZE; i += 2) {
444	>	assertTrue(q.contains(i));
445	>	assertTrue(q.remove(i));
446	>	assertFalse(q.contains(i));
447	>	assertFalse(q.remove(i + 1));
448	>	assertFalse(q.contains(i + 1));
449		}
450		assertTrue(q.isEmpty());
451		}
#	Line 433 | Line 483 | public class ArrayDequeTest extends JSR1
483		*/
484		public void testPeekLast() {
485		ArrayDeque q = populatedDeque(SIZE);
486	<	for (int i = SIZE-1; i >= 0; --i) {
486	>	for (int i = SIZE - 1; i >= 0; --i) {
487		assertEquals(i, q.peekLast());
488		assertEquals(i, q.pollLast());
489		assertTrue(q.peekLast() == null ||
#	Line 477 | Line 527 | public class ArrayDequeTest extends JSR1
527		*/
528		public void testLastElement() {
529		ArrayDeque q = populatedDeque(SIZE);
530	<	for (int i = SIZE-1; i >= 0; --i) {
530	>	for (int i = SIZE - 1; i >= 0; --i) {
531		assertEquals(i, q.getLast());
532		assertEquals(i, q.pollLast());
533		}
#	Line 488 | Line 538 | public class ArrayDequeTest extends JSR1
538		assertNull(q.peekLast());
539		}
540
491	–
541		/**
542		* removeFirst() removes first element, or throws NSEE if empty
543		*/
#	Line 524 | Line 573 | public class ArrayDequeTest extends JSR1
573		*/
574		public void testRemoveFirstOccurrence() {
575		ArrayDeque q = populatedDeque(SIZE);
576	<	for (int i = 1; i < SIZE; i+=2) {
576	>	assertFalse(q.removeFirstOccurrence(null));
577	>	for (int i = 1; i < SIZE; i += 2) {
578		assertTrue(q.removeFirstOccurrence(new Integer(i)));
579		}
580	<	for (int i = 0; i < SIZE; i+=2) {
580	>	for (int i = 0; i < SIZE; i += 2) {
581		assertTrue(q.removeFirstOccurrence(new Integer(i)));
582	<	assertFalse(q.removeFirstOccurrence(new Integer(i+1)));
582	>	assertFalse(q.removeFirstOccurrence(new Integer(i + 1)));
583		}
584		assertTrue(q.isEmpty());
585	+	assertFalse(q.removeFirstOccurrence(null));
586	+	assertFalse(q.removeFirstOccurrence(42));
587	+	q = new ArrayDeque();
588	+	assertFalse(q.removeFirstOccurrence(null));
589	+	assertFalse(q.removeFirstOccurrence(42));
590		}
591
592		/**
#	Line 539 | Line 594 | public class ArrayDequeTest extends JSR1
594		*/
595		public void testRemoveLastOccurrence() {
596		ArrayDeque q = populatedDeque(SIZE);
597	<	for (int i = 1; i < SIZE; i+=2) {
597	>	assertFalse(q.removeLastOccurrence(null));
598	>	for (int i = 1; i < SIZE; i += 2) {
599		assertTrue(q.removeLastOccurrence(new Integer(i)));
600		}
601	<	for (int i = 0; i < SIZE; i+=2) {
601	>	for (int i = 0; i < SIZE; i += 2) {
602		assertTrue(q.removeLastOccurrence(new Integer(i)));
603	<	assertFalse(q.removeLastOccurrence(new Integer(i+1)));
603	>	assertFalse(q.removeLastOccurrence(new Integer(i + 1)));
604		}
605		assertTrue(q.isEmpty());
606	+	assertFalse(q.removeLastOccurrence(null));
607	+	assertFalse(q.removeLastOccurrence(42));
608	+	q = new ArrayDeque();
609	+	assertFalse(q.removeLastOccurrence(null));
610	+	assertFalse(q.removeLastOccurrence(42));
611		}
612
613		/**
#	Line 599 | Line 660 | public class ArrayDequeTest extends JSR1
660		boolean changed = q.retainAll(p);
661		assertEquals(changed, (i > 0));
662		assertTrue(q.containsAll(p));
663	<	assertEquals(SIZE-i, q.size());
663	>	assertEquals(SIZE - i, q.size());
664		p.removeFirst();
665		}
666		}
#	Line 612 | Line 673 | public class ArrayDequeTest extends JSR1
673		ArrayDeque q = populatedDeque(SIZE);
674		ArrayDeque p = populatedDeque(i);
675		assertTrue(q.removeAll(p));
676	<	assertEquals(SIZE-i, q.size());
676	>	assertEquals(SIZE - i, q.size());
677		for (int j = 0; j < i; ++j) {
678		assertFalse(q.contains(p.removeFirst()));
679		}
680		}
681		}
682
683	+	void checkToArray(ArrayDeque q) {
684	+	int size = q.size();
685	+	Object[] o = q.toArray();
686	+	assertEquals(size, o.length);
687	+	Iterator it = q.iterator();
688	+	for (int i = 0; i < size; i++) {
689	+	Integer x = (Integer) it.next();
690	+	assertEquals((Integer)o[0] + i, (int) x);
691	+	assertSame(o[i], x);
692	+	}
693	+	}
694	+
695		/**
696		* toArray() contains all elements in FIFO order
697		*/
698		public void testToArray() {
699	<	ArrayDeque q = populatedDeque(SIZE);
700	<	Object[] o = q.toArray();
701	<	for (int i = 0; i < o.length; i++)
702	<	assertSame(o[i], q.pollFirst());
699	>	ArrayDeque q = new ArrayDeque();
700	>	for (int i = 0; i < SIZE; i++) {
701	>	checkToArray(q);
702	>	q.addLast(i);
703	>	}
704	>	// Provoke wraparound
705	>	for (int i = 0; i < SIZE; i++) {
706	>	checkToArray(q);
707	>	assertEquals(i, q.poll());
708	>	q.addLast(SIZE + i);
709	>	}
710	>	for (int i = 0; i < SIZE; i++) {
711	>	checkToArray(q);
712	>	assertEquals(SIZE + i, q.poll());
713	>	}
714	>	}
715	>
716	>	void checkToArray2(ArrayDeque q) {
717	>	int size = q.size();
718	>	Integer[] a1 = (size == 0) ? null : new Integer[size - 1];
719	>	Integer[] a2 = new Integer[size];
720	>	Integer[] a3 = new Integer[size + 2];
721	>	if (size > 0) Arrays.fill(a1, 42);
722	>	Arrays.fill(a2, 42);
723	>	Arrays.fill(a3, 42);
724	>	Integer[] b1 = (size == 0) ? null : (Integer[]) q.toArray(a1);
725	>	Integer[] b2 = (Integer[]) q.toArray(a2);
726	>	Integer[] b3 = (Integer[]) q.toArray(a3);
727	>	assertSame(a2, b2);
728	>	assertSame(a3, b3);
729	>	Iterator it = q.iterator();
730	>	for (int i = 0; i < size; i++) {
731	>	Integer x = (Integer) it.next();
732	>	assertSame(b1[i], x);
733	>	assertEquals(b1[0] + i, (int) x);
734	>	assertSame(b2[i], x);
735	>	assertSame(b3[i], x);
736	>	}
737	>	assertNull(a3[size]);
738	>	assertEquals(42, (int) a3[size + 1]);
739	>	if (size > 0) {
740	>	assertNotSame(a1, b1);
741	>	assertEquals(size, b1.length);
742	>	for (int i = 0; i < a1.length; i++) {
743	>	assertEquals(42, (int) a1[i]);
744	>	}
745	>	}
746		}
747
748		/**
749		* toArray(a) contains all elements in FIFO order
750		*/
751		public void testToArray2() {
752	<	ArrayDeque<Integer> q = populatedDeque(SIZE);
753	<	Integer[] ints = new Integer[SIZE];
754	<	Integer[] array = q.toArray(ints);
755	<	assertSame(ints, array);
756	<	for (int i = 0; i < ints.length; i++)
757	<	assertSame(ints[i], q.remove());
752	>	ArrayDeque q = new ArrayDeque();
753	>	for (int i = 0; i < SIZE; i++) {
754	>	checkToArray2(q);
755	>	q.addLast(i);
756	>	}
757	>	// Provoke wraparound
758	>	for (int i = 0; i < SIZE; i++) {
759	>	checkToArray2(q);
760	>	assertEquals(i, q.poll());
761	>	q.addLast(SIZE + i);
762	>	}
763	>	for (int i = 0; i < SIZE; i++) {
764	>	checkToArray2(q);
765	>	assertEquals(SIZE + i, q.poll());
766	>	}
767		}
768
769		/**
#	Line 670 | Line 795 | public class ArrayDequeTest extends JSR1
795		*/
796		public void testIterator() {
797		ArrayDeque q = populatedDeque(SIZE);
673	–	int i = 0;
798		Iterator it = q.iterator();
799	<	while (it.hasNext()) {
799	>	int i;
800	>	for (i = 0; it.hasNext(); i++)
801		assertTrue(q.contains(it.next()));
677	–	++i;
678	–	}
802		assertEquals(i, SIZE);
803	+	assertIteratorExhausted(it);
804	+	}
805	+
806	+	/**
807	+	* iterator of empty collection has no elements
808	+	*/
809	+	public void testEmptyIterator() {
810	+	Deque c = new ArrayDeque();
811	+	assertIteratorExhausted(c.iterator());
812	+	assertIteratorExhausted(c.descendingIterator());
813		}
814
815		/**
#	Line 703 | Line 836 | public class ArrayDequeTest extends JSR1
836		final Random rng = new Random();
837		for (int iters = 0; iters < 100; ++iters) {
838		int max = rng.nextInt(5) + 2;
839	<	int split = rng.nextInt(max-1) + 1;
839	>	int split = rng.nextInt(max - 1) + 1;
840		for (int j = 1; j <= max; ++j)
841		q.add(new Integer(j));
842		Iterator it = q.iterator();
843		for (int j = 1; j <= split; ++j)
844		assertEquals(it.next(), new Integer(j));
845		it.remove();
846	<	assertEquals(it.next(), new Integer(split+1));
846	>	assertEquals(it.next(), new Integer(split + 1));
847		for (int j = 1; j <= split; ++j)
848		q.remove(new Integer(j));
849		it = q.iterator();
850	<	for (int j = split+1; j <= max; ++j) {
850	>	for (int j = split + 1; j <= max; ++j) {
851		assertEquals(it.next(), new Integer(j));
852		it.remove();
853		}
#	Line 771 | Line 904 | public class ArrayDequeTest extends JSR1
904		final Random rng = new Random();
905		for (int iters = 0; iters < 100; ++iters) {
906		int max = rng.nextInt(5) + 2;
907	<	int split = rng.nextInt(max-1) + 1;
907	>	int split = rng.nextInt(max - 1) + 1;
908		for (int j = max; j >= 1; --j)
909		q.add(new Integer(j));
910		Iterator it = q.descendingIterator();
911		for (int j = 1; j <= split; ++j)
912		assertEquals(it.next(), new Integer(j));
913		it.remove();
914	<	assertEquals(it.next(), new Integer(split+1));
914	>	assertEquals(it.next(), new Integer(split + 1));
915		for (int j = 1; j <= split; ++j)
916		q.remove(new Integer(j));
917		it = q.descendingIterator();
918	<	for (int j = split+1; j <= max; ++j) {
918	>	for (int j = split + 1; j <= max; ++j) {
919		assertEquals(it.next(), new Integer(j));
920		it.remove();
921		}
#	Line 791 | Line 924 | public class ArrayDequeTest extends JSR1
924		}
925		}
926
794	–
927		/**
928		* toString() contains toStrings of elements
929		*/
#	Line 799 | Line 931 | public class ArrayDequeTest extends JSR1
931		ArrayDeque q = populatedDeque(SIZE);
932		String s = q.toString();
933		for (int i = 0; i < SIZE; ++i) {
934	<	assertTrue(s.indexOf(String.valueOf(i)) >= 0);
934	>	assertTrue(s.contains(String.valueOf(i)));
935		}
936		}
937
#	Line 807 | Line 939 | public class ArrayDequeTest extends JSR1
939		* A deserialized serialized deque has same elements in same order
940		*/
941		public void testSerialization() throws Exception {
942	<	ArrayDeque q = populatedDeque(SIZE);
943	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
944	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
945	<	out.writeObject(q);
946	<	out.close();
947	<
948	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
949	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
950	<	ArrayDeque r = (ArrayDeque)in.readObject();
951	<	assertEquals(q.size(), r.size());
952	<	while (!q.isEmpty())
953	<	assertEquals(q.remove(), r.remove());
942	>	Queue x = populatedDeque(SIZE);
943	>	Queue y = serialClone(x);
944	>
945	>	assertNotSame(y, x);
946	>	assertEquals(x.size(), y.size());
947	>	assertEquals(x.toString(), y.toString());
948	>	assertTrue(Arrays.equals(x.toArray(), y.toArray()));
949	>	while (!x.isEmpty()) {
950	>	assertFalse(y.isEmpty());
951	>	assertEquals(x.remove(), y.remove());
952	>	}
953	>	assertTrue(y.isEmpty());
954	>	}
955	>
956	>	/**
957	>	* A cloned deque has same elements in same order
958	>	*/
959	>	public void testClone() throws Exception {
960	>	ArrayDeque<Integer> x = populatedDeque(SIZE);
961	>	ArrayDeque<Integer> y = x.clone();
962	>
963	>	assertNotSame(y, x);
964	>	assertEquals(x.size(), y.size());
965	>	assertEquals(x.toString(), y.toString());
966	>	assertTrue(Arrays.equals(x.toArray(), y.toArray()));
967	>	while (!x.isEmpty()) {
968	>	assertFalse(y.isEmpty());
969	>	assertEquals(x.remove(), y.remove());
970	>	}
971	>	assertTrue(y.isEmpty());
972	>	}
973	>
974	>	/**
975	>	* remove(null), contains(null) always return false
976	>	*/
977	>	public void testNeverContainsNull() {
978	>	Deque<?>[] qs = {
979	>	new ArrayDeque<Object>(),
980	>	populatedDeque(2),
981	>	};
982	>
983	>	for (Deque<?> q : qs) {
984	>	assertFalse(q.contains(null));
985	>	assertFalse(q.remove(null));
986	>	assertFalse(q.removeFirstOccurrence(null));
987	>	assertFalse(q.removeLastOccurrence(null));
988	>	}
989		}
990
991		}

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