| 49 |
|
impl); |
| 50 |
|
} |
| 51 |
|
|
| 52 |
+ |
Object bomb() { |
| 53 |
+ |
return new Object() { |
| 54 |
+ |
public boolean equals(Object x) { throw new AssertionError(); } |
| 55 |
+ |
public int hashCode() { throw new AssertionError(); } |
| 56 |
+ |
}; |
| 57 |
+ |
} |
| 58 |
+ |
|
| 59 |
|
/** Checks properties of empty collections. */ |
| 60 |
|
public void testEmptyMeansEmpty() { |
| 61 |
|
Collection c = impl.emptyCollection(); |
| 88 |
|
c.iterator().forEachRemaining(alwaysThrows); |
| 89 |
|
c.spliterator().forEachRemaining(alwaysThrows); |
| 90 |
|
assertFalse(c.spliterator().tryAdvance(alwaysThrows)); |
| 91 |
< |
if (Queue.class.isAssignableFrom(impl.klazz())) { |
| 91 |
> |
if (c.spliterator().hasCharacteristics(Spliterator.SIZED)) |
| 92 |
> |
assertEquals(0, c.spliterator().estimateSize()); |
| 93 |
> |
assertFalse(c.contains(bomb())); |
| 94 |
> |
assertFalse(c.remove(bomb())); |
| 95 |
> |
if (c instanceof Queue) { |
| 96 |
|
Queue q = (Queue) c; |
| 97 |
|
assertNull(q.peek()); |
| 98 |
|
assertNull(q.poll()); |
| 99 |
|
} |
| 100 |
< |
if (Deque.class.isAssignableFrom(impl.klazz())) { |
| 100 |
> |
if (c instanceof Deque) { |
| 101 |
|
Deque d = (Deque) c; |
| 102 |
|
assertNull(d.peekFirst()); |
| 103 |
|
assertNull(d.peekLast()); |
| 104 |
|
assertNull(d.pollFirst()); |
| 105 |
|
assertNull(d.pollLast()); |
| 106 |
|
assertIteratorExhausted(d.descendingIterator()); |
| 107 |
+ |
d.descendingIterator().forEachRemaining(alwaysThrows); |
| 108 |
+ |
assertFalse(d.removeFirstOccurrence(bomb())); |
| 109 |
+ |
assertFalse(d.removeLastOccurrence(bomb())); |
| 110 |
|
} |
| 111 |
|
} |
| 112 |
|
|
