19 |
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import java.util.concurrent.CountDownLatch; |
20 |
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import java.util.concurrent.Executors; |
21 |
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import java.util.concurrent.ExecutorService; |
22 |
+ |
import java.util.concurrent.ThreadLocalRandom; |
23 |
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|
24 |
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import junit.framework.Test; |
25 |
|
|
601 |
|
} |
602 |
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} |
603 |
|
|
604 |
< |
void checkToArray(ArrayBlockingQueue q) { |
604 |
> |
void checkToArray(ArrayBlockingQueue<Integer> q) { |
605 |
|
int size = q.size(); |
606 |
< |
Object[] o = q.toArray(); |
607 |
< |
assertEquals(size, o.length); |
606 |
> |
Object[] a1 = q.toArray(); |
607 |
> |
assertEquals(size, a1.length); |
608 |
> |
Integer[] a2 = q.toArray(new Integer[0]); |
609 |
> |
assertEquals(size, a2.length); |
610 |
> |
Integer[] a3 = q.toArray(new Integer[Math.max(0, size - 1)]); |
611 |
> |
assertEquals(size, a3.length); |
612 |
> |
Integer[] a4 = new Integer[size]; |
613 |
> |
assertSame(a4, q.toArray(a4)); |
614 |
> |
Integer[] a5 = new Integer[size + 1]; |
615 |
> |
Arrays.fill(a5, 42); |
616 |
> |
assertSame(a5, q.toArray(a5)); |
617 |
> |
Integer[] a6 = new Integer[size + 2]; |
618 |
> |
Arrays.fill(a6, 42); |
619 |
> |
assertSame(a6, q.toArray(a6)); |
620 |
> |
Object[][] as = { a1, a2, a3, a4, a5, a6 }; |
621 |
> |
for (Object[] a : as) { |
622 |
> |
if (a.length > size) assertNull(a[size]); |
623 |
> |
if (a.length > size + 1) assertEquals(42, a[size + 1]); |
624 |
> |
} |
625 |
|
Iterator it = q.iterator(); |
626 |
+ |
Integer s = q.peek(); |
627 |
|
for (int i = 0; i < size; i++) { |
628 |
|
Integer x = (Integer) it.next(); |
629 |
< |
assertEquals((Integer)o[0] + i, (int) x); |
630 |
< |
assertSame(o[i], x); |
629 |
> |
assertEquals(s + i, (int) x); |
630 |
> |
for (Object[] a : as) |
631 |
> |
assertSame(a1[i], x); |
632 |
|
} |
633 |
|
} |
634 |
|
|
635 |
|
/** |
636 |
< |
* toArray() contains all elements in FIFO order |
636 |
> |
* toArray() and toArray(a) contain all elements in FIFO order |
637 |
|
*/ |
638 |
|
public void testToArray() { |
639 |
< |
ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE); |
640 |
< |
for (int i = 0; i < SIZE; i++) { |
639 |
> |
final ThreadLocalRandom rnd = ThreadLocalRandom.current(); |
640 |
> |
final int size = rnd.nextInt(6); |
641 |
> |
final int capacity = Math.max(1, size + rnd.nextInt(size + 1)); |
642 |
> |
ArrayBlockingQueue<Integer> q = new ArrayBlockingQueue<>(capacity); |
643 |
> |
for (int i = 0; i < size; i++) { |
644 |
|
checkToArray(q); |
645 |
|
q.add(i); |
646 |
|
} |
647 |
|
// Provoke wraparound |
648 |
< |
for (int i = 0; i < SIZE; i++) { |
649 |
< |
checkToArray(q); |
627 |
< |
assertEquals(i, q.poll()); |
628 |
< |
checkToArray(q); |
629 |
< |
q.add(SIZE + i); |
630 |
< |
} |
631 |
< |
for (int i = 0; i < SIZE; i++) { |
648 |
> |
int added = size * 2; |
649 |
> |
for (int i = 0; i < added; i++) { |
650 |
|
checkToArray(q); |
651 |
< |
assertEquals(SIZE + i, q.poll()); |
651 |
> |
assertEquals((Integer) i, q.poll()); |
652 |
> |
q.add(size + i); |
653 |
|
} |
635 |
– |
} |
636 |
– |
|
637 |
– |
void checkToArray2(ArrayBlockingQueue q) { |
638 |
– |
int size = q.size(); |
639 |
– |
Integer[] a1 = (size == 0) ? null : new Integer[size - 1]; |
640 |
– |
Integer[] a2 = new Integer[size]; |
641 |
– |
Integer[] a3 = new Integer[size + 2]; |
642 |
– |
if (size > 0) Arrays.fill(a1, 42); |
643 |
– |
Arrays.fill(a2, 42); |
644 |
– |
Arrays.fill(a3, 42); |
645 |
– |
Integer[] b1 = (size == 0) ? null : (Integer[]) q.toArray(a1); |
646 |
– |
Integer[] b2 = (Integer[]) q.toArray(a2); |
647 |
– |
Integer[] b3 = (Integer[]) q.toArray(a3); |
648 |
– |
assertSame(a2, b2); |
649 |
– |
assertSame(a3, b3); |
650 |
– |
Iterator it = q.iterator(); |
654 |
|
for (int i = 0; i < size; i++) { |
655 |
< |
Integer x = (Integer) it.next(); |
656 |
< |
assertSame(b1[i], x); |
654 |
< |
assertEquals(b1[0] + i, (int) x); |
655 |
< |
assertSame(b2[i], x); |
656 |
< |
assertSame(b3[i], x); |
657 |
< |
} |
658 |
< |
assertNull(a3[size]); |
659 |
< |
assertEquals(42, (int) a3[size + 1]); |
660 |
< |
if (size > 0) { |
661 |
< |
assertNotSame(a1, b1); |
662 |
< |
assertEquals(size, b1.length); |
663 |
< |
for (int i = 0; i < a1.length; i++) { |
664 |
< |
assertEquals(42, (int) a1[i]); |
665 |
< |
} |
666 |
< |
} |
667 |
< |
} |
668 |
< |
|
669 |
< |
/** |
670 |
< |
* toArray(a) contains all elements in FIFO order |
671 |
< |
*/ |
672 |
< |
public void testToArray2() { |
673 |
< |
ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE); |
674 |
< |
for (int i = 0; i < SIZE; i++) { |
675 |
< |
checkToArray2(q); |
676 |
< |
q.add(i); |
677 |
< |
} |
678 |
< |
// Provoke wraparound |
679 |
< |
for (int i = 0; i < SIZE; i++) { |
680 |
< |
checkToArray2(q); |
681 |
< |
assertEquals(i, q.poll()); |
682 |
< |
checkToArray2(q); |
683 |
< |
q.add(SIZE + i); |
684 |
< |
} |
685 |
< |
for (int i = 0; i < SIZE; i++) { |
686 |
< |
checkToArray2(q); |
687 |
< |
assertEquals(SIZE + i, q.poll()); |
655 |
> |
checkToArray(q); |
656 |
> |
assertEquals((Integer) (added + i), q.poll()); |
657 |
|
} |
658 |
|
} |
659 |
|
|
660 |
|
/** |
661 |
|
* toArray(incompatible array type) throws ArrayStoreException |
662 |
|
*/ |
663 |
< |
public void testToArray1_BadArg() { |
663 |
> |
public void testToArray_incompatibleArrayType() { |
664 |
|
ArrayBlockingQueue q = populatedQueue(SIZE); |
665 |
|
try { |
666 |
|
q.toArray(new String[10]); |
667 |
|
shouldThrow(); |
668 |
|
} catch (ArrayStoreException success) {} |
669 |
+ |
try { |
670 |
+ |
q.toArray(new String[0]); |
671 |
+ |
shouldThrow(); |
672 |
+ |
} catch (ArrayStoreException success) {} |
673 |
|
} |
674 |
|
|
675 |
|
/** |