| 8 |
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import java.util.ArrayDeque; |
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import java.util.Arrays; |
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import java.util.Collection; |
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import java.util.Collections; |
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import java.util.Deque; |
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import java.util.Iterator; |
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import java.util.NoSuchElementException; |
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import java.util.concurrent.ThreadLocalRandom; |
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import junit.framework.Test; |
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import junit.framework.TestSuite; |
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public class ArrayDequeTest extends JSR166TestCase { |
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public static void main(String[] args) { |
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*/ |
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private static ArrayDeque<Integer> populatedDeque(int n) { |
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// Randomize various aspects of memory layout, including |
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// filled-to-capacity and wraparound. |
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> |
// capacity slop and wraparound. |
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final ArrayDeque<Integer> q; |
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ThreadLocalRandom rnd = ThreadLocalRandom.current(); |
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switch (rnd.nextInt(6)) { |
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* removeFirstOccurrence(x) removes x and returns true if present |
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*/ |
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public void testRemoveFirstOccurrence() { |
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< |
ArrayDeque q = populatedDeque(SIZE); |
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> |
Deque<Integer> q = populatedDeque(SIZE); |
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assertFalse(q.removeFirstOccurrence(null)); |
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for (int i = 1; i < SIZE; i += 2) { |
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assertTrue(q.removeFirstOccurrence(new Integer(i))); |
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> |
assertTrue(q.removeFirstOccurrence(i)); |
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> |
assertFalse(q.contains(i)); |
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} |
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for (int i = 0; i < SIZE; i += 2) { |
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assertTrue(q.removeFirstOccurrence(new Integer(i))); |
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assertFalse(q.removeFirstOccurrence(new Integer(i + 1))); |
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> |
assertTrue(q.removeFirstOccurrence(i)); |
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> |
assertFalse(q.removeFirstOccurrence(i + 1)); |
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> |
assertFalse(q.contains(i)); |
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> |
assertFalse(q.contains(i + 1)); |
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} |
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assertTrue(q.isEmpty()); |
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assertFalse(q.removeFirstOccurrence(null)); |
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* removeLastOccurrence(x) removes x and returns true if present |
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*/ |
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public void testRemoveLastOccurrence() { |
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ArrayDeque q = populatedDeque(SIZE); |
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> |
Deque<Integer> q = populatedDeque(SIZE); |
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assertFalse(q.removeLastOccurrence(null)); |
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for (int i = 1; i < SIZE; i += 2) { |
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< |
assertTrue(q.removeLastOccurrence(new Integer(i))); |
| 600 |
> |
assertTrue(q.removeLastOccurrence(i)); |
| 601 |
> |
assertFalse(q.contains(i)); |
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} |
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for (int i = 0; i < SIZE; i += 2) { |
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assertTrue(q.removeLastOccurrence(new Integer(i))); |
| 605 |
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assertFalse(q.removeLastOccurrence(new Integer(i + 1))); |
| 604 |
> |
assertTrue(q.removeLastOccurrence(i)); |
| 605 |
> |
assertFalse(q.removeLastOccurrence(i + 1)); |
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> |
assertFalse(q.contains(i)); |
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> |
assertFalse(q.contains(i + 1)); |
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} |
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assertTrue(q.isEmpty()); |
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assertFalse(q.removeLastOccurrence(null)); |
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} |
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} |
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|
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void checkToArray(ArrayDeque q) { |
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> |
void checkToArray(ArrayDeque<Integer> q) { |
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int size = q.size(); |
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Object[] o = q.toArray(); |
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assertEquals(size, o.length); |
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> |
Object[] a1 = q.toArray(); |
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> |
assertEquals(size, a1.length); |
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> |
Integer[] a2 = q.toArray(new Integer[0]); |
| 692 |
> |
assertEquals(size, a2.length); |
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> |
Integer[] a3 = q.toArray(new Integer[Math.max(0, size - 1)]); |
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> |
assertEquals(size, a3.length); |
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> |
Integer[] a4 = new Integer[size]; |
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> |
assertSame(a4, q.toArray(a4)); |
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> |
Integer[] a5 = new Integer[size + 1]; |
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> |
Arrays.fill(a5, 42); |
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> |
assertSame(a5, q.toArray(a5)); |
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> |
Integer[] a6 = new Integer[size + 2]; |
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> |
Arrays.fill(a6, 42); |
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> |
assertSame(a6, q.toArray(a6)); |
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> |
Object[][] as = { a1, a2, a3, a4, a5, a6 }; |
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> |
for (Object[] a : as) { |
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> |
if (a.length > size) assertNull(a[size]); |
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> |
if (a.length > size + 1) assertEquals(42, a[size + 1]); |
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> |
} |
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Iterator it = q.iterator(); |
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Integer s = q.peekFirst(); |
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for (int i = 0; i < size; i++) { |
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Integer x = (Integer) it.next(); |
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assertEquals((Integer)o[0] + i, (int) x); |
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assertSame(o[i], x); |
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assertEquals(s + i, (int) x); |
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> |
for (Object[] a : as) |
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> |
assertSame(a1[i], x); |
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} |
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} |
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/** |
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* toArray() contains all elements in FIFO order |
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* toArray() and toArray(a) contain all elements in FIFO order |
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*/ |
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public void testToArray() { |
| 722 |
< |
ArrayDeque q = new ArrayDeque(); |
| 723 |
< |
for (int i = 0; i < SIZE; i++) { |
| 722 |
> |
final int size = ThreadLocalRandom.current().nextInt(10); |
| 723 |
> |
ArrayDeque<Integer> q = new ArrayDeque<>(size); |
| 724 |
> |
for (int i = 0; i < size; i++) { |
| 725 |
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checkToArray(q); |
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q.addLast(i); |
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} |
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// Provoke wraparound |
| 729 |
< |
for (int i = 0; i < SIZE; i++) { |
| 730 |
< |
checkToArray(q); |
| 707 |
< |
assertEquals(i, q.poll()); |
| 708 |
< |
q.addLast(SIZE + i); |
| 709 |
< |
} |
| 710 |
< |
for (int i = 0; i < SIZE; i++) { |
| 729 |
> |
int added = size * 2; |
| 730 |
> |
for (int i = 0; i < added; i++) { |
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checkToArray(q); |
| 732 |
< |
assertEquals(SIZE + i, q.poll()); |
| 732 |
> |
assertEquals((Integer) i, q.poll()); |
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> |
q.addLast(size + i); |
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} |
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} |
| 715 |
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|
| 716 |
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void checkToArray2(ArrayDeque q) { |
| 717 |
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int size = q.size(); |
| 718 |
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Integer[] a1 = (size == 0) ? null : new Integer[size - 1]; |
| 719 |
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Integer[] a2 = new Integer[size]; |
| 720 |
– |
Integer[] a3 = new Integer[size + 2]; |
| 721 |
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if (size > 0) Arrays.fill(a1, 42); |
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Arrays.fill(a2, 42); |
| 723 |
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Arrays.fill(a3, 42); |
| 724 |
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Integer[] b1 = (size == 0) ? null : (Integer[]) q.toArray(a1); |
| 725 |
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Integer[] b2 = (Integer[]) q.toArray(a2); |
| 726 |
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Integer[] b3 = (Integer[]) q.toArray(a3); |
| 727 |
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assertSame(a2, b2); |
| 728 |
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assertSame(a3, b3); |
| 729 |
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Iterator it = q.iterator(); |
| 735 |
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for (int i = 0; i < size; i++) { |
| 736 |
< |
Integer x = (Integer) it.next(); |
| 737 |
< |
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 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()); |
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> |
checkToArray(q); |
| 737 |
> |
assertEquals((Integer) (added + i), q.poll()); |
| 738 |
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} |
| 739 |
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} |
| 740 |
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|
| 745 |
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ArrayDeque l = new ArrayDeque(); |
| 746 |
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l.add(new Object()); |
| 747 |
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try { |
| 748 |
< |
l.toArray(null); |
| 748 |
> |
l.toArray((Object[])null); |
| 749 |
|
shouldThrow(); |
| 750 |
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} catch (NullPointerException success) {} |
| 751 |
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} |
| 753 |
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/** |
| 754 |
|
* toArray(incompatible array type) throws ArrayStoreException |
| 755 |
|
*/ |
| 756 |
< |
public void testToArray1_BadArg() { |
| 756 |
> |
public void testToArray_incompatibleArrayType() { |
| 757 |
|
ArrayDeque l = new ArrayDeque(); |
| 758 |
|
l.add(new Integer(5)); |
| 759 |
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try { |
| 760 |
|
l.toArray(new String[10]); |
| 761 |
|
shouldThrow(); |
| 762 |
|
} catch (ArrayStoreException success) {} |
| 763 |
+ |
try { |
| 764 |
+ |
l.toArray(new String[0]); |
| 765 |
+ |
shouldThrow(); |
| 766 |
+ |
} catch (ArrayStoreException success) {} |
| 767 |
|
} |
| 768 |
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|
| 769 |
|
/** |
| 912 |
|
} |
| 913 |
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|
| 914 |
|
/** |
| 915 |
< |
* A deserialized serialized deque has same elements in same order |
| 915 |
> |
* A deserialized/reserialized deque has same elements in same order |
| 916 |
|
*/ |
| 917 |
|
public void testSerialization() throws Exception { |
| 918 |
|
Queue x = populatedDeque(SIZE); |
| 921 |
|
assertNotSame(y, x); |
| 922 |
|
assertEquals(x.size(), y.size()); |
| 923 |
|
assertEquals(x.toString(), y.toString()); |
| 924 |
+ |
assertEquals(Arrays.toString(x.toArray()), Arrays.toString(y.toArray())); |
| 925 |
|
assertTrue(Arrays.equals(x.toArray(), y.toArray())); |
| 926 |
|
while (!x.isEmpty()) { |
| 927 |
|
assertFalse(y.isEmpty()); |
