4 |
|
* http://creativecommons.org/publicdomain/zero/1.0/ |
5 |
|
*/ |
6 |
|
|
7 |
– |
import junit.framework.*; |
8 |
– |
import java.util.Arrays; |
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; |
13 |
|
import java.util.Queue; |
14 |
|
import java.util.Random; |
15 |
|
|
16 |
+ |
import junit.framework.Test; |
17 |
+ |
import junit.framework.TestSuite; |
18 |
+ |
|
19 |
|
public class ArrayDequeTest extends JSR166TestCase { |
20 |
|
public static void main(String[] args) { |
21 |
< |
junit.textui.TestRunner.run(suite()); |
21 |
> |
main(suite(), args); |
22 |
|
} |
23 |
|
|
24 |
|
public static Test suite() { |
51 |
|
*/ |
52 |
|
public void testConstructor3() { |
53 |
|
try { |
54 |
< |
ArrayDeque q = new ArrayDeque((Collection)null); |
54 |
> |
new ArrayDeque((Collection)null); |
55 |
|
shouldThrow(); |
56 |
|
} catch (NullPointerException success) {} |
57 |
|
} |
61 |
|
*/ |
62 |
|
public void testConstructor4() { |
63 |
|
try { |
64 |
< |
Integer[] ints = new Integer[SIZE]; |
63 |
< |
ArrayDeque q = new ArrayDeque(Arrays.asList(ints)); |
64 |
> |
new ArrayDeque(Arrays.asList(new Integer[SIZE])); |
65 |
|
shouldThrow(); |
66 |
|
} catch (NullPointerException success) {} |
67 |
|
} |
70 |
|
* Initializing from Collection with some null elements throws NPE |
71 |
|
*/ |
72 |
|
public void testConstructor5() { |
73 |
+ |
Integer[] ints = new Integer[SIZE]; |
74 |
+ |
for (int i = 0; i < SIZE - 1; ++i) |
75 |
+ |
ints[i] = new Integer(i); |
76 |
|
try { |
77 |
< |
Integer[] ints = new Integer[SIZE]; |
74 |
< |
for (int i = 0; i < SIZE-1; ++i) |
75 |
< |
ints[i] = new Integer(i); |
76 |
< |
ArrayDeque q = new ArrayDeque(Arrays.asList(ints)); |
77 |
> |
new ArrayDeque(Arrays.asList(ints)); |
78 |
|
shouldThrow(); |
79 |
|
} catch (NullPointerException success) {} |
80 |
|
} |
111 |
|
public void testSize() { |
112 |
|
ArrayDeque q = populatedDeque(SIZE); |
113 |
|
for (int i = 0; i < SIZE; ++i) { |
114 |
< |
assertEquals(SIZE-i, q.size()); |
114 |
> |
assertEquals(SIZE - i, q.size()); |
115 |
|
q.removeFirst(); |
116 |
|
} |
117 |
|
for (int i = 0; i < SIZE; ++i) { |
124 |
|
* push(null) throws NPE |
125 |
|
*/ |
126 |
|
public void testPushNull() { |
127 |
+ |
ArrayDeque q = new ArrayDeque(1); |
128 |
|
try { |
127 |
– |
ArrayDeque q = new ArrayDeque(1); |
129 |
|
q.push(null); |
130 |
|
shouldThrow(); |
131 |
|
} catch (NullPointerException success) {} |
159 |
|
* offer(null) throws NPE |
160 |
|
*/ |
161 |
|
public void testOfferNull() { |
162 |
+ |
ArrayDeque q = new ArrayDeque(); |
163 |
|
try { |
162 |
– |
ArrayDeque q = new ArrayDeque(); |
164 |
|
q.offer(null); |
165 |
|
shouldThrow(); |
166 |
|
} catch (NullPointerException success) {} |
170 |
|
* offerFirst(null) throws NPE |
171 |
|
*/ |
172 |
|
public void testOfferFirstNull() { |
173 |
+ |
ArrayDeque q = new ArrayDeque(); |
174 |
|
try { |
173 |
– |
ArrayDeque q = new ArrayDeque(); |
175 |
|
q.offerFirst(null); |
176 |
|
shouldThrow(); |
177 |
|
} catch (NullPointerException success) {} |
181 |
|
* offerLast(null) throws NPE |
182 |
|
*/ |
183 |
|
public void testOfferLastNull() { |
184 |
+ |
ArrayDeque q = new ArrayDeque(); |
185 |
|
try { |
184 |
– |
ArrayDeque q = new ArrayDeque(); |
186 |
|
q.offerLast(null); |
187 |
|
shouldThrow(); |
188 |
|
} catch (NullPointerException success) {} |
225 |
|
* add(null) throws NPE |
226 |
|
*/ |
227 |
|
public void testAddNull() { |
228 |
+ |
ArrayDeque q = new ArrayDeque(); |
229 |
|
try { |
228 |
– |
ArrayDeque q = new ArrayDeque(); |
230 |
|
q.add(null); |
231 |
|
shouldThrow(); |
232 |
|
} catch (NullPointerException success) {} |
236 |
|
* addFirst(null) throws NPE |
237 |
|
*/ |
238 |
|
public void testAddFirstNull() { |
239 |
+ |
ArrayDeque q = new ArrayDeque(); |
240 |
|
try { |
239 |
– |
ArrayDeque q = new ArrayDeque(); |
241 |
|
q.addFirst(null); |
242 |
|
shouldThrow(); |
243 |
|
} catch (NullPointerException success) {} |
247 |
|
* addLast(null) throws NPE |
248 |
|
*/ |
249 |
|
public void testAddLastNull() { |
250 |
+ |
ArrayDeque q = new ArrayDeque(); |
251 |
|
try { |
250 |
– |
ArrayDeque q = new ArrayDeque(); |
252 |
|
q.addLast(null); |
253 |
|
shouldThrow(); |
254 |
|
} catch (NullPointerException success) {} |
291 |
|
* addAll(null) throws NPE |
292 |
|
*/ |
293 |
|
public void testAddAll1() { |
294 |
+ |
ArrayDeque q = new ArrayDeque(); |
295 |
|
try { |
294 |
– |
ArrayDeque q = new ArrayDeque(); |
296 |
|
q.addAll(null); |
297 |
|
shouldThrow(); |
298 |
|
} catch (NullPointerException success) {} |
302 |
|
* addAll of a collection with null elements throws NPE |
303 |
|
*/ |
304 |
|
public void testAddAll2() { |
305 |
+ |
ArrayDeque q = new ArrayDeque(); |
306 |
|
try { |
307 |
< |
ArrayDeque q = new ArrayDeque(); |
306 |
< |
Integer[] ints = new Integer[SIZE]; |
307 |
< |
q.addAll(Arrays.asList(ints)); |
307 |
> |
q.addAll(Arrays.asList(new Integer[SIZE])); |
308 |
|
shouldThrow(); |
309 |
|
} catch (NullPointerException success) {} |
310 |
|
} |
314 |
|
* possibly adding some elements |
315 |
|
*/ |
316 |
|
public void testAddAll3() { |
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); |
321 |
|
try { |
318 |
– |
ArrayDeque q = new ArrayDeque(); |
319 |
– |
Integer[] ints = new Integer[SIZE]; |
320 |
– |
for (int i = 0; i < SIZE-1; ++i) |
321 |
– |
ints[i] = new Integer(i); |
322 |
|
q.addAll(Arrays.asList(ints)); |
323 |
|
shouldThrow(); |
324 |
|
} catch (NullPointerException success) {} |
355 |
|
*/ |
356 |
|
public void testPollLast() { |
357 |
|
ArrayDeque q = populatedDeque(SIZE); |
358 |
< |
for (int i = SIZE-1; i >= 0; --i) { |
358 |
> |
for (int i = SIZE - 1; i >= 0; --i) { |
359 |
|
assertEquals(i, q.pollLast()); |
360 |
|
} |
361 |
|
assertNull(q.pollLast()); |
391 |
|
*/ |
392 |
|
public void testRemoveElement() { |
393 |
|
ArrayDeque q = populatedDeque(SIZE); |
394 |
< |
for (int i = 1; i < SIZE; i+=2) { |
394 |
> |
for (int i = 1; i < SIZE; i += 2) { |
395 |
|
assertTrue(q.contains(i)); |
396 |
|
assertTrue(q.remove(i)); |
397 |
|
assertFalse(q.contains(i)); |
398 |
< |
assertTrue(q.contains(i-1)); |
398 |
> |
assertTrue(q.contains(i - 1)); |
399 |
|
} |
400 |
< |
for (int i = 0; i < SIZE; i+=2) { |
400 |
> |
for (int i = 0; i < SIZE; i += 2) { |
401 |
|
assertTrue(q.contains(i)); |
402 |
|
assertTrue(q.remove(i)); |
403 |
|
assertFalse(q.contains(i)); |
404 |
< |
assertFalse(q.remove(i+1)); |
405 |
< |
assertFalse(q.contains(i+1)); |
404 |
> |
assertFalse(q.remove(i + 1)); |
405 |
> |
assertFalse(q.contains(i + 1)); |
406 |
|
} |
407 |
|
assertTrue(q.isEmpty()); |
408 |
|
} |
440 |
|
*/ |
441 |
|
public void testPeekLast() { |
442 |
|
ArrayDeque q = populatedDeque(SIZE); |
443 |
< |
for (int i = SIZE-1; i >= 0; --i) { |
443 |
> |
for (int i = SIZE - 1; i >= 0; --i) { |
444 |
|
assertEquals(i, q.peekLast()); |
445 |
|
assertEquals(i, q.pollLast()); |
446 |
|
assertTrue(q.peekLast() == null || |
484 |
|
*/ |
485 |
|
public void testLastElement() { |
486 |
|
ArrayDeque q = populatedDeque(SIZE); |
487 |
< |
for (int i = SIZE-1; i >= 0; --i) { |
487 |
> |
for (int i = SIZE - 1; i >= 0; --i) { |
488 |
|
assertEquals(i, q.getLast()); |
489 |
|
assertEquals(i, q.pollLast()); |
490 |
|
} |
530 |
|
*/ |
531 |
|
public void testRemoveFirstOccurrence() { |
532 |
|
ArrayDeque q = populatedDeque(SIZE); |
533 |
< |
for (int i = 1; i < SIZE; i+=2) { |
533 |
> |
assertFalse(q.removeFirstOccurrence(null)); |
534 |
> |
for (int i = 1; i < SIZE; i += 2) { |
535 |
|
assertTrue(q.removeFirstOccurrence(new Integer(i))); |
536 |
|
} |
537 |
< |
for (int i = 0; i < SIZE; i+=2) { |
537 |
> |
for (int i = 0; i < SIZE; i += 2) { |
538 |
|
assertTrue(q.removeFirstOccurrence(new Integer(i))); |
539 |
< |
assertFalse(q.removeFirstOccurrence(new Integer(i+1))); |
539 |
> |
assertFalse(q.removeFirstOccurrence(new Integer(i + 1))); |
540 |
|
} |
541 |
|
assertTrue(q.isEmpty()); |
542 |
+ |
assertFalse(q.removeFirstOccurrence(null)); |
543 |
+ |
assertFalse(q.removeFirstOccurrence(42)); |
544 |
+ |
q = new ArrayDeque(); |
545 |
+ |
assertFalse(q.removeFirstOccurrence(null)); |
546 |
+ |
assertFalse(q.removeFirstOccurrence(42)); |
547 |
|
} |
548 |
|
|
549 |
|
/** |
551 |
|
*/ |
552 |
|
public void testRemoveLastOccurrence() { |
553 |
|
ArrayDeque q = populatedDeque(SIZE); |
554 |
< |
for (int i = 1; i < SIZE; i+=2) { |
554 |
> |
assertFalse(q.removeLastOccurrence(null)); |
555 |
> |
for (int i = 1; i < SIZE; i += 2) { |
556 |
|
assertTrue(q.removeLastOccurrence(new Integer(i))); |
557 |
|
} |
558 |
< |
for (int i = 0; i < SIZE; i+=2) { |
558 |
> |
for (int i = 0; i < SIZE; i += 2) { |
559 |
|
assertTrue(q.removeLastOccurrence(new Integer(i))); |
560 |
< |
assertFalse(q.removeLastOccurrence(new Integer(i+1))); |
560 |
> |
assertFalse(q.removeLastOccurrence(new Integer(i + 1))); |
561 |
|
} |
562 |
|
assertTrue(q.isEmpty()); |
563 |
+ |
assertFalse(q.removeLastOccurrence(null)); |
564 |
+ |
assertFalse(q.removeLastOccurrence(42)); |
565 |
+ |
q = new ArrayDeque(); |
566 |
+ |
assertFalse(q.removeLastOccurrence(null)); |
567 |
+ |
assertFalse(q.removeLastOccurrence(42)); |
568 |
|
} |
569 |
|
|
570 |
|
/** |
617 |
|
boolean changed = q.retainAll(p); |
618 |
|
assertEquals(changed, (i > 0)); |
619 |
|
assertTrue(q.containsAll(p)); |
620 |
< |
assertEquals(SIZE-i, q.size()); |
620 |
> |
assertEquals(SIZE - i, q.size()); |
621 |
|
p.removeFirst(); |
622 |
|
} |
623 |
|
} |
630 |
|
ArrayDeque q = populatedDeque(SIZE); |
631 |
|
ArrayDeque p = populatedDeque(i); |
632 |
|
assertTrue(q.removeAll(p)); |
633 |
< |
assertEquals(SIZE-i, q.size()); |
633 |
> |
assertEquals(SIZE - i, q.size()); |
634 |
|
for (int j = 0; j < i; ++j) { |
635 |
|
assertFalse(q.contains(p.removeFirst())); |
636 |
|
} |
637 |
|
} |
638 |
|
} |
639 |
|
|
640 |
+ |
void checkToArray(ArrayDeque q) { |
641 |
+ |
int size = q.size(); |
642 |
+ |
Object[] o = q.toArray(); |
643 |
+ |
assertEquals(size, o.length); |
644 |
+ |
Iterator it = q.iterator(); |
645 |
+ |
for (int i = 0; i < size; i++) { |
646 |
+ |
Integer x = (Integer) it.next(); |
647 |
+ |
assertEquals((Integer)o[0] + i, (int) x); |
648 |
+ |
assertSame(o[i], x); |
649 |
+ |
} |
650 |
+ |
} |
651 |
+ |
|
652 |
|
/** |
653 |
|
* toArray() contains all elements in FIFO order |
654 |
|
*/ |
655 |
|
public void testToArray() { |
656 |
< |
ArrayDeque q = populatedDeque(SIZE); |
657 |
< |
Object[] o = q.toArray(); |
658 |
< |
for (int i = 0; i < o.length; i++) |
659 |
< |
assertSame(o[i], q.pollFirst()); |
656 |
> |
ArrayDeque q = new ArrayDeque(); |
657 |
> |
for (int i = 0; i < SIZE; i++) { |
658 |
> |
checkToArray(q); |
659 |
> |
q.addLast(i); |
660 |
> |
} |
661 |
> |
// Provoke wraparound |
662 |
> |
for (int i = 0; i < SIZE; i++) { |
663 |
> |
checkToArray(q); |
664 |
> |
assertEquals(i, q.poll()); |
665 |
> |
q.addLast(SIZE + i); |
666 |
> |
} |
667 |
> |
for (int i = 0; i < SIZE; i++) { |
668 |
> |
checkToArray(q); |
669 |
> |
assertEquals(SIZE + i, q.poll()); |
670 |
> |
} |
671 |
> |
} |
672 |
> |
|
673 |
> |
void checkToArray2(ArrayDeque q) { |
674 |
> |
int size = q.size(); |
675 |
> |
Integer[] a1 = (size == 0) ? null : new Integer[size - 1]; |
676 |
> |
Integer[] a2 = new Integer[size]; |
677 |
> |
Integer[] a3 = new Integer[size + 2]; |
678 |
> |
if (size > 0) Arrays.fill(a1, 42); |
679 |
> |
Arrays.fill(a2, 42); |
680 |
> |
Arrays.fill(a3, 42); |
681 |
> |
Integer[] b1 = (size == 0) ? null : (Integer[]) q.toArray(a1); |
682 |
> |
Integer[] b2 = (Integer[]) q.toArray(a2); |
683 |
> |
Integer[] b3 = (Integer[]) q.toArray(a3); |
684 |
> |
assertSame(a2, b2); |
685 |
> |
assertSame(a3, b3); |
686 |
> |
Iterator it = q.iterator(); |
687 |
> |
for (int i = 0; i < size; i++) { |
688 |
> |
Integer x = (Integer) it.next(); |
689 |
> |
assertSame(b1[i], x); |
690 |
> |
assertEquals(b1[0] + i, (int) x); |
691 |
> |
assertSame(b2[i], x); |
692 |
> |
assertSame(b3[i], x); |
693 |
> |
} |
694 |
> |
assertNull(a3[size]); |
695 |
> |
assertEquals(42, (int) a3[size + 1]); |
696 |
> |
if (size > 0) { |
697 |
> |
assertNotSame(a1, b1); |
698 |
> |
assertEquals(size, b1.length); |
699 |
> |
for (int i = 0; i < a1.length; i++) { |
700 |
> |
assertEquals(42, (int) a1[i]); |
701 |
> |
} |
702 |
> |
} |
703 |
|
} |
704 |
|
|
705 |
|
/** |
706 |
|
* toArray(a) contains all elements in FIFO order |
707 |
|
*/ |
708 |
|
public void testToArray2() { |
709 |
< |
ArrayDeque<Integer> q = populatedDeque(SIZE); |
710 |
< |
Integer[] ints = new Integer[SIZE]; |
711 |
< |
Integer[] array = q.toArray(ints); |
712 |
< |
assertSame(ints, array); |
713 |
< |
for (int i = 0; i < ints.length; i++) |
714 |
< |
assertSame(ints[i], q.remove()); |
709 |
> |
ArrayDeque q = new ArrayDeque(); |
710 |
> |
for (int i = 0; i < SIZE; i++) { |
711 |
> |
checkToArray2(q); |
712 |
> |
q.addLast(i); |
713 |
> |
} |
714 |
> |
// Provoke wraparound |
715 |
> |
for (int i = 0; i < SIZE; i++) { |
716 |
> |
checkToArray2(q); |
717 |
> |
assertEquals(i, q.poll()); |
718 |
> |
q.addLast(SIZE + i); |
719 |
> |
} |
720 |
> |
for (int i = 0; i < SIZE; i++) { |
721 |
> |
checkToArray2(q); |
722 |
> |
assertEquals(SIZE + i, q.poll()); |
723 |
> |
} |
724 |
|
} |
725 |
|
|
726 |
|
/** |
752 |
|
*/ |
753 |
|
public void testIterator() { |
754 |
|
ArrayDeque q = populatedDeque(SIZE); |
679 |
– |
int i = 0; |
755 |
|
Iterator it = q.iterator(); |
756 |
< |
while (it.hasNext()) { |
756 |
> |
int i; |
757 |
> |
for (i = 0; it.hasNext(); i++) |
758 |
|
assertTrue(q.contains(it.next())); |
683 |
– |
++i; |
684 |
– |
} |
759 |
|
assertEquals(i, SIZE); |
760 |
+ |
assertIteratorExhausted(it); |
761 |
+ |
} |
762 |
+ |
|
763 |
+ |
/** |
764 |
+ |
* iterator of empty collection has no elements |
765 |
+ |
*/ |
766 |
+ |
public void testEmptyIterator() { |
767 |
+ |
Deque c = new ArrayDeque(); |
768 |
+ |
assertIteratorExhausted(c.iterator()); |
769 |
+ |
assertIteratorExhausted(c.descendingIterator()); |
770 |
|
} |
771 |
|
|
772 |
|
/** |
793 |
|
final Random rng = new Random(); |
794 |
|
for (int iters = 0; iters < 100; ++iters) { |
795 |
|
int max = rng.nextInt(5) + 2; |
796 |
< |
int split = rng.nextInt(max-1) + 1; |
796 |
> |
int split = rng.nextInt(max - 1) + 1; |
797 |
|
for (int j = 1; j <= max; ++j) |
798 |
|
q.add(new Integer(j)); |
799 |
|
Iterator it = q.iterator(); |
800 |
|
for (int j = 1; j <= split; ++j) |
801 |
|
assertEquals(it.next(), new Integer(j)); |
802 |
|
it.remove(); |
803 |
< |
assertEquals(it.next(), new Integer(split+1)); |
803 |
> |
assertEquals(it.next(), new Integer(split + 1)); |
804 |
|
for (int j = 1; j <= split; ++j) |
805 |
|
q.remove(new Integer(j)); |
806 |
|
it = q.iterator(); |
807 |
< |
for (int j = split+1; j <= max; ++j) { |
807 |
> |
for (int j = split + 1; j <= max; ++j) { |
808 |
|
assertEquals(it.next(), new Integer(j)); |
809 |
|
it.remove(); |
810 |
|
} |
861 |
|
final Random rng = new Random(); |
862 |
|
for (int iters = 0; iters < 100; ++iters) { |
863 |
|
int max = rng.nextInt(5) + 2; |
864 |
< |
int split = rng.nextInt(max-1) + 1; |
864 |
> |
int split = rng.nextInt(max - 1) + 1; |
865 |
|
for (int j = max; j >= 1; --j) |
866 |
|
q.add(new Integer(j)); |
867 |
|
Iterator it = q.descendingIterator(); |
868 |
|
for (int j = 1; j <= split; ++j) |
869 |
|
assertEquals(it.next(), new Integer(j)); |
870 |
|
it.remove(); |
871 |
< |
assertEquals(it.next(), new Integer(split+1)); |
871 |
> |
assertEquals(it.next(), new Integer(split + 1)); |
872 |
|
for (int j = 1; j <= split; ++j) |
873 |
|
q.remove(new Integer(j)); |
874 |
|
it = q.descendingIterator(); |
875 |
< |
for (int j = split+1; j <= max; ++j) { |
875 |
> |
for (int j = split + 1; j <= max; ++j) { |
876 |
|
assertEquals(it.next(), new Integer(j)); |
877 |
|
it.remove(); |
878 |
|
} |
899 |
|
Queue x = populatedDeque(SIZE); |
900 |
|
Queue y = serialClone(x); |
901 |
|
|
902 |
< |
assertTrue(x != y); |
902 |
> |
assertNotSame(y, x); |
903 |
|
assertEquals(x.size(), y.size()); |
904 |
|
assertEquals(x.toString(), y.toString()); |
905 |
|
assertTrue(Arrays.equals(x.toArray(), y.toArray())); |
910 |
|
assertTrue(y.isEmpty()); |
911 |
|
} |
912 |
|
|
913 |
+ |
/** |
914 |
+ |
* remove(null), contains(null) always return false |
915 |
+ |
*/ |
916 |
+ |
public void testNeverContainsNull() { |
917 |
+ |
Deque<?>[] qs = { |
918 |
+ |
new ArrayDeque<Object>(), |
919 |
+ |
populatedDeque(2), |
920 |
+ |
}; |
921 |
+ |
|
922 |
+ |
for (Deque<?> q : qs) { |
923 |
+ |
assertFalse(q.contains(null)); |
924 |
+ |
assertFalse(q.remove(null)); |
925 |
+ |
assertFalse(q.removeFirstOccurrence(null)); |
926 |
+ |
assertFalse(q.removeLastOccurrence(null)); |
927 |
+ |
} |
928 |
+ |
} |
929 |
+ |
|
930 |
|
} |