1 |
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/* |
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 |
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 |
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* http://creativecommons.org/publicdomain/zero/1.0/ |
6 |
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*/ |
7 |
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|
7 |
– |
import junit.framework.*; |
8 |
– |
import java.util.Arrays; |
8 |
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import java.util.ArrayDeque; |
9 |
+ |
import java.util.Arrays; |
10 |
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import java.util.Collection; |
11 |
+ |
import java.util.Collections; |
12 |
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import java.util.Deque; |
13 |
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import java.util.Iterator; |
14 |
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import java.util.NoSuchElementException; |
15 |
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import java.util.Queue; |
16 |
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import java.util.Random; |
17 |
+ |
import java.util.concurrent.ThreadLocalRandom; |
18 |
+ |
|
19 |
+ |
import junit.framework.Test; |
20 |
+ |
import junit.framework.TestSuite; |
21 |
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|
22 |
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public class ArrayDequeTest extends JSR166TestCase { |
23 |
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public static void main(String[] args) { |
24 |
< |
junit.textui.TestRunner.run(suite()); |
24 |
> |
main(suite(), args); |
25 |
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} |
26 |
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|
27 |
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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 |
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} |
38 |
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|
39 |
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/** |
40 |
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* Returns a new deque of given size containing consecutive |
41 |
< |
* Integers 0 ... n. |
41 |
> |
* Integers 0 ... n - 1. |
42 |
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*/ |
43 |
< |
private ArrayDeque<Integer> populatedDeque(int n) { |
44 |
< |
ArrayDeque<Integer> q = new ArrayDeque<Integer>(); |
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 |
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return q; |
83 |
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} |
84 |
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|
94 |
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*/ |
95 |
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public void testConstructor3() { |
96 |
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try { |
97 |
< |
ArrayDeque q = new ArrayDeque((Collection)null); |
97 |
> |
new ArrayDeque((Collection)null); |
98 |
|
shouldThrow(); |
99 |
|
} catch (NullPointerException success) {} |
100 |
|
} |
104 |
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*/ |
105 |
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public void testConstructor4() { |
106 |
|
try { |
107 |
< |
Integer[] ints = new Integer[SIZE]; |
63 |
< |
ArrayDeque q = new ArrayDeque(Arrays.asList(ints)); |
107 |
> |
new ArrayDeque(Arrays.asList(new Integer[SIZE])); |
108 |
|
shouldThrow(); |
109 |
|
} catch (NullPointerException success) {} |
110 |
|
} |
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]; |
74 |
< |
for (int i = 0; i < SIZE-1; ++i) |
75 |
< |
ints[i] = new Integer(i); |
76 |
< |
ArrayDeque q = new ArrayDeque(Arrays.asList(ints)); |
120 |
> |
new ArrayDeque(Arrays.asList(ints)); |
121 |
|
shouldThrow(); |
122 |
|
} catch (NullPointerException success) {} |
123 |
|
} |
154 |
|
public void testSize() { |
155 |
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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) { |
167 |
|
* push(null) throws NPE |
168 |
|
*/ |
169 |
|
public void testPushNull() { |
170 |
+ |
ArrayDeque q = new ArrayDeque(1); |
171 |
|
try { |
127 |
– |
ArrayDeque q = new ArrayDeque(1); |
172 |
|
q.push(null); |
173 |
|
shouldThrow(); |
174 |
|
} catch (NullPointerException success) {} |
202 |
|
* offer(null) throws NPE |
203 |
|
*/ |
204 |
|
public void testOfferNull() { |
205 |
+ |
ArrayDeque q = new ArrayDeque(); |
206 |
|
try { |
162 |
– |
ArrayDeque q = new ArrayDeque(); |
207 |
|
q.offer(null); |
208 |
|
shouldThrow(); |
209 |
|
} catch (NullPointerException success) {} |
213 |
|
* offerFirst(null) throws NPE |
214 |
|
*/ |
215 |
|
public void testOfferFirstNull() { |
216 |
+ |
ArrayDeque q = new ArrayDeque(); |
217 |
|
try { |
173 |
– |
ArrayDeque q = new ArrayDeque(); |
218 |
|
q.offerFirst(null); |
219 |
|
shouldThrow(); |
220 |
|
} catch (NullPointerException success) {} |
224 |
|
* offerLast(null) throws NPE |
225 |
|
*/ |
226 |
|
public void testOfferLastNull() { |
227 |
+ |
ArrayDeque q = new ArrayDeque(); |
228 |
|
try { |
184 |
– |
ArrayDeque q = new ArrayDeque(); |
229 |
|
q.offerLast(null); |
230 |
|
shouldThrow(); |
231 |
|
} catch (NullPointerException success) {} |
268 |
|
* add(null) throws NPE |
269 |
|
*/ |
270 |
|
public void testAddNull() { |
271 |
+ |
ArrayDeque q = new ArrayDeque(); |
272 |
|
try { |
228 |
– |
ArrayDeque q = new ArrayDeque(); |
273 |
|
q.add(null); |
274 |
|
shouldThrow(); |
275 |
|
} catch (NullPointerException success) {} |
279 |
|
* addFirst(null) throws NPE |
280 |
|
*/ |
281 |
|
public void testAddFirstNull() { |
282 |
+ |
ArrayDeque q = new ArrayDeque(); |
283 |
|
try { |
239 |
– |
ArrayDeque q = new ArrayDeque(); |
284 |
|
q.addFirst(null); |
285 |
|
shouldThrow(); |
286 |
|
} catch (NullPointerException success) {} |
290 |
|
* addLast(null) throws NPE |
291 |
|
*/ |
292 |
|
public void testAddLastNull() { |
293 |
+ |
ArrayDeque q = new ArrayDeque(); |
294 |
|
try { |
250 |
– |
ArrayDeque q = new ArrayDeque(); |
295 |
|
q.addLast(null); |
296 |
|
shouldThrow(); |
297 |
|
} catch (NullPointerException success) {} |
334 |
|
* addAll(null) throws NPE |
335 |
|
*/ |
336 |
|
public void testAddAll1() { |
337 |
+ |
ArrayDeque q = new ArrayDeque(); |
338 |
|
try { |
294 |
– |
ArrayDeque q = new ArrayDeque(); |
339 |
|
q.addAll(null); |
340 |
|
shouldThrow(); |
341 |
|
} catch (NullPointerException success) {} |
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(); |
306 |
< |
Integer[] ints = new Integer[SIZE]; |
307 |
< |
q.addAll(Arrays.asList(ints)); |
350 |
> |
q.addAll(Arrays.asList(new Integer[SIZE])); |
351 |
|
shouldThrow(); |
352 |
|
} catch (NullPointerException success) {} |
353 |
|
} |
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 { |
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); |
365 |
|
q.addAll(Arrays.asList(ints)); |
366 |
|
shouldThrow(); |
367 |
|
} catch (NullPointerException success) {} |
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()); |
434 |
|
*/ |
435 |
|
public void testRemoveElement() { |
436 |
|
ArrayDeque q = populatedDeque(SIZE); |
437 |
< |
for (int i = 1; i < SIZE; i+=2) { |
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)); |
441 |
> |
assertTrue(q.contains(i - 1)); |
442 |
|
} |
443 |
< |
for (int i = 0; i < SIZE; i+=2) { |
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)); |
447 |
> |
assertFalse(q.remove(i + 1)); |
448 |
> |
assertFalse(q.contains(i + 1)); |
449 |
|
} |
450 |
|
assertTrue(q.isEmpty()); |
451 |
|
} |
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 || |
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 |
|
} |
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 |
|
/** |
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 |
|
/** |
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 |
|
} |
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 |
|
/** |
795 |
|
*/ |
796 |
|
public void testIterator() { |
797 |
|
ArrayDeque q = populatedDeque(SIZE); |
679 |
– |
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())); |
683 |
– |
++i; |
684 |
– |
} |
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 |
|
/** |
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 |
|
} |
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 |
|
} |
942 |
|
Queue x = populatedDeque(SIZE); |
943 |
|
Queue y = serialClone(x); |
944 |
|
|
945 |
< |
assertTrue(x != y); |
945 |
> |
assertNotSame(y, x); |
946 |
|
assertEquals(x.size(), y.size()); |
947 |
|
assertEquals(x.toString(), y.toString()); |
948 |
|
assertTrue(Arrays.equals(x.toArray(), y.toArray())); |
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 |
|
} |