8 |
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import static java.util.concurrent.TimeUnit.HOURS; |
9 |
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import static java.util.concurrent.TimeUnit.MILLISECONDS; |
10 |
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|
11 |
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import java.util.ArrayDeque; |
12 |
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import java.util.ArrayList; |
13 |
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import java.util.Arrays; |
14 |
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import java.util.Collection; |
15 |
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import java.util.Collections; |
16 |
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import java.util.ConcurrentModificationException; |
17 |
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import java.util.Deque; |
18 |
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import java.util.HashSet; |
19 |
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import java.util.Iterator; |
20 |
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import java.util.List; |
21 |
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import java.util.NoSuchElementException; |
22 |
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import java.util.Queue; |
23 |
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import java.util.Set; |
24 |
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import java.util.Spliterator; |
25 |
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import java.util.concurrent.BlockingDeque; |
26 |
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import java.util.concurrent.BlockingQueue; |
61 |
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62 |
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Object bomb() { |
63 |
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return new Object() { |
64 |
< |
public boolean equals(Object x) { throw new AssertionError(); } |
65 |
< |
public int hashCode() { throw new AssertionError(); } |
66 |
< |
}; |
64 |
> |
@Override public boolean equals(Object x) { throw new AssertionError(); } |
65 |
> |
@Override public int hashCode() { throw new AssertionError(); } |
66 |
> |
@Override public String toString() { throw new AssertionError(); } |
67 |
> |
}; |
68 |
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} |
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70 |
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/** Checks properties of empty collections. */ |
95 |
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assertTrue(c.isEmpty()); |
96 |
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assertEquals(0, c.size()); |
97 |
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assertEquals("[]", c.toString()); |
98 |
+ |
if (c instanceof List<?>) { |
99 |
+ |
List x = (List) c; |
100 |
+ |
assertEquals(1, x.hashCode()); |
101 |
+ |
assertEquals(x, Collections.emptyList()); |
102 |
+ |
assertEquals(Collections.emptyList(), x); |
103 |
+ |
assertEquals(-1, x.indexOf(impl.makeElement(86))); |
104 |
+ |
assertEquals(-1, x.lastIndexOf(impl.makeElement(99))); |
105 |
+ |
assertThrows( |
106 |
+ |
IndexOutOfBoundsException.class, |
107 |
+ |
() -> x.get(0), |
108 |
+ |
() -> x.set(0, impl.makeElement(42))); |
109 |
+ |
} |
110 |
+ |
else if (c instanceof Set<?>) { |
111 |
+ |
assertEquals(0, c.hashCode()); |
112 |
+ |
assertEquals(c, Collections.emptySet()); |
113 |
+ |
assertEquals(Collections.emptySet(), c); |
114 |
+ |
} |
115 |
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{ |
116 |
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Object[] a = c.toArray(); |
117 |
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assertEquals(0, a.length); |
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} |
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if (c instanceof BlockingQueue) { |
162 |
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BlockingQueue q = (BlockingQueue) c; |
163 |
< |
assertNull(q.poll(0L, MILLISECONDS)); |
163 |
> |
assertNull(q.poll(randomExpiredTimeout(), randomTimeUnit())); |
164 |
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} |
165 |
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if (c instanceof BlockingDeque) { |
166 |
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BlockingDeque q = (BlockingDeque) c; |
167 |
< |
assertNull(q.pollFirst(0L, MILLISECONDS)); |
168 |
< |
assertNull(q.pollLast(0L, MILLISECONDS)); |
167 |
> |
assertNull(q.pollFirst(randomExpiredTimeout(), randomTimeUnit())); |
168 |
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assertNull(q.pollLast(randomExpiredTimeout(), randomTimeUnit())); |
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} |
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} |
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|
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() -> c.iterator().forEachRemaining(null), |
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() -> c.spliterator().forEachRemaining(null), |
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() -> c.spliterator().tryAdvance(null), |
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() -> c.toArray(null)); |
185 |
> |
() -> c.toArray((Object[])null)); |
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|
187 |
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if (!impl.permitsNulls()) { |
188 |
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assertThrows( |
210 |
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BlockingQueue q = (BlockingQueue) c; |
211 |
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assertThrows( |
212 |
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NullPointerException.class, |
213 |
< |
() -> { |
214 |
< |
try { q.offer(null, 1L, HOURS); } |
194 |
< |
catch (InterruptedException ex) { |
195 |
< |
throw new AssertionError(ex); |
196 |
< |
}}, |
197 |
< |
() -> { |
198 |
< |
try { q.put(null); } |
199 |
< |
catch (InterruptedException ex) { |
200 |
< |
throw new AssertionError(ex); |
201 |
< |
}}); |
213 |
> |
() -> q.offer(null, 1L, HOURS), |
214 |
> |
() -> q.put(null)); |
215 |
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} |
216 |
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if (c instanceof BlockingDeque) { |
217 |
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BlockingDeque q = (BlockingDeque) c; |
218 |
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assertThrows( |
219 |
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NullPointerException.class, |
220 |
< |
() -> { |
221 |
< |
try { q.offerFirst(null, 1L, HOURS); } |
222 |
< |
catch (InterruptedException ex) { |
223 |
< |
throw new AssertionError(ex); |
211 |
< |
}}, |
212 |
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() -> { |
213 |
< |
try { q.offerLast(null, 1L, HOURS); } |
214 |
< |
catch (InterruptedException ex) { |
215 |
< |
throw new AssertionError(ex); |
216 |
< |
}}, |
217 |
< |
() -> { |
218 |
< |
try { q.putFirst(null); } |
219 |
< |
catch (InterruptedException ex) { |
220 |
< |
throw new AssertionError(ex); |
221 |
< |
}}, |
222 |
< |
() -> { |
223 |
< |
try { q.putLast(null); } |
224 |
< |
catch (InterruptedException ex) { |
225 |
< |
throw new AssertionError(ex); |
226 |
< |
}}); |
220 |
> |
() -> q.offerFirst(null, 1L, HOURS), |
221 |
> |
() -> q.offerLast(null, 1L, HOURS), |
222 |
> |
() -> q.putFirst(null), |
223 |
> |
() -> q.putLast(null)); |
224 |
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} |
225 |
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} |
226 |
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|
248 |
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() -> d.pop(), |
249 |
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() -> d.descendingIterator().next()); |
250 |
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} |
251 |
+ |
if (c instanceof List) { |
252 |
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List x = (List) c; |
253 |
+ |
assertThrows( |
254 |
+ |
NoSuchElementException.class, |
255 |
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() -> x.iterator().next(), |
256 |
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() -> x.listIterator().next(), |
257 |
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() -> x.listIterator(0).next(), |
258 |
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() -> x.listIterator().previous(), |
259 |
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() -> x.listIterator(0).previous()); |
260 |
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} |
261 |
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} |
262 |
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|
263 |
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public void testRemoveIf() { |
349 |
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} |
350 |
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|
351 |
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/** |
352 |
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* All elements removed in the middle of CONCURRENT traversal. |
353 |
+ |
*/ |
354 |
+ |
public void testElementRemovalDuringTraversal() { |
355 |
+ |
Collection c = impl.emptyCollection(); |
356 |
+ |
ThreadLocalRandom rnd = ThreadLocalRandom.current(); |
357 |
+ |
int n = rnd.nextInt(6); |
358 |
+ |
ArrayList copy = new ArrayList(); |
359 |
+ |
for (int i = 0; i < n; i++) { |
360 |
+ |
Object x = impl.makeElement(i); |
361 |
+ |
copy.add(x); |
362 |
+ |
c.add(x); |
363 |
+ |
} |
364 |
+ |
ArrayList iterated = new ArrayList(); |
365 |
+ |
ArrayList spliterated = new ArrayList(); |
366 |
+ |
Spliterator s = c.spliterator(); |
367 |
+ |
Iterator it = c.iterator(); |
368 |
+ |
for (int i = rnd.nextInt(n + 1); --i >= 0; ) { |
369 |
+ |
assertTrue(s.tryAdvance(spliterated::add)); |
370 |
+ |
if (rnd.nextBoolean()) assertTrue(it.hasNext()); |
371 |
+ |
iterated.add(it.next()); |
372 |
+ |
} |
373 |
+ |
Consumer alwaysThrows = e -> { throw new AssertionError(); }; |
374 |
+ |
if (s.hasCharacteristics(Spliterator.CONCURRENT)) { |
375 |
+ |
c.clear(); // TODO: many more removal methods |
376 |
+ |
if (testImplementationDetails |
377 |
+ |
&& !(c instanceof java.util.concurrent.ArrayBlockingQueue)) { |
378 |
+ |
if (rnd.nextBoolean()) |
379 |
+ |
assertFalse(s.tryAdvance(alwaysThrows)); |
380 |
+ |
else |
381 |
+ |
s.forEachRemaining(alwaysThrows); |
382 |
+ |
} |
383 |
+ |
if (it.hasNext()) iterated.add(it.next()); |
384 |
+ |
if (rnd.nextBoolean()) assertIteratorExhausted(it); |
385 |
+ |
} |
386 |
+ |
assertTrue(copy.containsAll(iterated)); |
387 |
+ |
assertTrue(copy.containsAll(spliterated)); |
388 |
+ |
} |
389 |
+ |
|
390 |
+ |
/** |
391 |
+ |
* Some elements randomly disappear in the middle of traversal. |
392 |
+ |
*/ |
393 |
+ |
public void testRandomElementRemovalDuringTraversal() { |
394 |
+ |
Collection c = impl.emptyCollection(); |
395 |
+ |
ThreadLocalRandom rnd = ThreadLocalRandom.current(); |
396 |
+ |
int n = rnd.nextInt(6); |
397 |
+ |
ArrayList copy = new ArrayList(); |
398 |
+ |
for (int i = 0; i < n; i++) { |
399 |
+ |
Object x = impl.makeElement(i); |
400 |
+ |
copy.add(x); |
401 |
+ |
c.add(x); |
402 |
+ |
} |
403 |
+ |
ArrayList iterated = new ArrayList(); |
404 |
+ |
ArrayList spliterated = new ArrayList(); |
405 |
+ |
ArrayList removed = new ArrayList(); |
406 |
+ |
Spliterator s = c.spliterator(); |
407 |
+ |
Iterator it = c.iterator(); |
408 |
+ |
if (! (s.hasCharacteristics(Spliterator.CONCURRENT) || |
409 |
+ |
s.hasCharacteristics(Spliterator.IMMUTABLE))) |
410 |
+ |
return; |
411 |
+ |
for (int i = rnd.nextInt(n + 1); --i >= 0; ) { |
412 |
+ |
assertTrue(s.tryAdvance(e -> {})); |
413 |
+ |
if (rnd.nextBoolean()) assertTrue(it.hasNext()); |
414 |
+ |
it.next(); |
415 |
+ |
} |
416 |
+ |
// TODO: many more removal methods |
417 |
+ |
if (rnd.nextBoolean()) { |
418 |
+ |
for (Iterator z = c.iterator(); z.hasNext(); ) { |
419 |
+ |
Object e = z.next(); |
420 |
+ |
if (rnd.nextBoolean()) { |
421 |
+ |
try { |
422 |
+ |
z.remove(); |
423 |
+ |
} catch (UnsupportedOperationException ok) { return; } |
424 |
+ |
removed.add(e); |
425 |
+ |
} |
426 |
+ |
} |
427 |
+ |
} else { |
428 |
+ |
Predicate randomlyRemove = e -> { |
429 |
+ |
if (rnd.nextBoolean()) { removed.add(e); return true; } |
430 |
+ |
else return false; |
431 |
+ |
}; |
432 |
+ |
c.removeIf(randomlyRemove); |
433 |
+ |
} |
434 |
+ |
s.forEachRemaining(spliterated::add); |
435 |
+ |
while (it.hasNext()) |
436 |
+ |
iterated.add(it.next()); |
437 |
+ |
assertTrue(copy.containsAll(iterated)); |
438 |
+ |
assertTrue(copy.containsAll(spliterated)); |
439 |
+ |
assertTrue(copy.containsAll(removed)); |
440 |
+ |
if (s.hasCharacteristics(Spliterator.CONCURRENT)) { |
441 |
+ |
ArrayList iteratedAndRemoved = new ArrayList(iterated); |
442 |
+ |
ArrayList spliteratedAndRemoved = new ArrayList(spliterated); |
443 |
+ |
iteratedAndRemoved.retainAll(removed); |
444 |
+ |
spliteratedAndRemoved.retainAll(removed); |
445 |
+ |
assertTrue(iteratedAndRemoved.size() <= 1); |
446 |
+ |
assertTrue(spliteratedAndRemoved.size() <= 1); |
447 |
+ |
if (testImplementationDetails |
448 |
+ |
&& !(c instanceof java.util.concurrent.ArrayBlockingQueue)) |
449 |
+ |
assertTrue(spliteratedAndRemoved.isEmpty()); |
450 |
+ |
} |
451 |
+ |
} |
452 |
+ |
|
453 |
+ |
/** |
454 |
|
* Various ways of traversing a collection yield same elements |
455 |
|
*/ |
456 |
< |
public void testIteratorEquivalence() { |
456 |
> |
public void testTraversalEquivalence() { |
457 |
|
Collection c = impl.emptyCollection(); |
458 |
|
ThreadLocalRandom rnd = ThreadLocalRandom.current(); |
459 |
|
int n = rnd.nextInt(6); |
521 |
|
} |
522 |
|
|
523 |
|
/** |
524 |
+ |
* Iterator.forEachRemaining has same behavior as Iterator's |
525 |
+ |
* default implementation. |
526 |
+ |
*/ |
527 |
+ |
public void testForEachRemainingConsistentWithDefaultImplementation() { |
528 |
+ |
Collection c = impl.emptyCollection(); |
529 |
+ |
if (!testImplementationDetails |
530 |
+ |
|| c.getClass() == java.util.LinkedList.class) |
531 |
+ |
return; |
532 |
+ |
ThreadLocalRandom rnd = ThreadLocalRandom.current(); |
533 |
+ |
int n = 1 + rnd.nextInt(3); |
534 |
+ |
for (int i = 0; i < n; i++) c.add(impl.makeElement(i)); |
535 |
+ |
ArrayList iterated = new ArrayList(); |
536 |
+ |
ArrayList iteratedForEachRemaining = new ArrayList(); |
537 |
+ |
Iterator it1 = c.iterator(); |
538 |
+ |
Iterator it2 = c.iterator(); |
539 |
+ |
assertTrue(it1.hasNext()); |
540 |
+ |
assertTrue(it2.hasNext()); |
541 |
+ |
c.clear(); |
542 |
+ |
Object r1, r2; |
543 |
+ |
try { |
544 |
+ |
while (it1.hasNext()) iterated.add(it1.next()); |
545 |
+ |
r1 = iterated; |
546 |
+ |
} catch (ConcurrentModificationException ex) { |
547 |
+ |
r1 = ConcurrentModificationException.class; |
548 |
+ |
assertFalse(impl.isConcurrent()); |
549 |
+ |
} |
550 |
+ |
try { |
551 |
+ |
it2.forEachRemaining(iteratedForEachRemaining::add); |
552 |
+ |
r2 = iteratedForEachRemaining; |
553 |
+ |
} catch (ConcurrentModificationException ex) { |
554 |
+ |
r2 = ConcurrentModificationException.class; |
555 |
+ |
assertFalse(impl.isConcurrent()); |
556 |
+ |
} |
557 |
+ |
assertEquals(r1, r2); |
558 |
+ |
} |
559 |
+ |
|
560 |
+ |
/** |
561 |
|
* Calling Iterator#remove() after Iterator#forEachRemaining |
562 |
|
* should (maybe) remove last element |
563 |
|
*/ |
564 |
|
public void testRemoveAfterForEachRemaining() { |
565 |
|
Collection c = impl.emptyCollection(); |
566 |
|
ThreadLocalRandom rnd = ThreadLocalRandom.current(); |
567 |
+ |
ArrayList copy = new ArrayList(); |
568 |
+ |
boolean ordered = c.spliterator().hasCharacteristics(Spliterator.ORDERED); |
569 |
|
testCollection: { |
570 |
|
int n = 3 + rnd.nextInt(2); |
571 |
< |
for (int i = 0; i < n; i++) c.add(impl.makeElement(i)); |
571 |
> |
for (int i = 0; i < n; i++) { |
572 |
> |
Object x = impl.makeElement(i); |
573 |
> |
c.add(x); |
574 |
> |
copy.add(x); |
575 |
> |
} |
576 |
|
Iterator it = c.iterator(); |
577 |
< |
assertTrue(it.hasNext()); |
578 |
< |
assertEquals(impl.makeElement(0), it.next()); |
579 |
< |
assertTrue(it.hasNext()); |
580 |
< |
assertEquals(impl.makeElement(1), it.next()); |
581 |
< |
it.forEachRemaining(e -> assertTrue(c.contains(e))); |
577 |
> |
if (ordered) { |
578 |
> |
if (rnd.nextBoolean()) assertTrue(it.hasNext()); |
579 |
> |
assertEquals(impl.makeElement(0), it.next()); |
580 |
> |
if (rnd.nextBoolean()) assertTrue(it.hasNext()); |
581 |
> |
assertEquals(impl.makeElement(1), it.next()); |
582 |
> |
} else { |
583 |
> |
if (rnd.nextBoolean()) assertTrue(it.hasNext()); |
584 |
> |
assertTrue(copy.contains(it.next())); |
585 |
> |
if (rnd.nextBoolean()) assertTrue(it.hasNext()); |
586 |
> |
assertTrue(copy.contains(it.next())); |
587 |
> |
} |
588 |
> |
if (rnd.nextBoolean()) assertTrue(it.hasNext()); |
589 |
> |
it.forEachRemaining( |
590 |
> |
e -> { |
591 |
> |
assertTrue(c.contains(e)); |
592 |
> |
assertTrue(copy.contains(e));}); |
593 |
|
if (testImplementationDetails) { |
594 |
|
if (c instanceof java.util.concurrent.ArrayBlockingQueue) { |
595 |
|
assertIteratorExhausted(it); |
599 |
|
break testCollection; |
600 |
|
} |
601 |
|
assertEquals(n - 1, c.size()); |
602 |
< |
for (int i = 0; i < n - 1; i++) |
603 |
< |
assertTrue(c.contains(impl.makeElement(i))); |
604 |
< |
assertFalse(c.contains(impl.makeElement(n - 1))); |
602 |
> |
if (ordered) { |
603 |
> |
for (int i = 0; i < n - 1; i++) |
604 |
> |
assertTrue(c.contains(impl.makeElement(i))); |
605 |
> |
assertFalse(c.contains(impl.makeElement(n - 1))); |
606 |
> |
} |
607 |
|
} |
608 |
|
} |
609 |
|
} |
610 |
|
if (c instanceof Deque) { |
611 |
|
Deque d = (Deque) impl.emptyCollection(); |
612 |
+ |
assertTrue(ordered); |
613 |
|
int n = 3 + rnd.nextInt(2); |
614 |
|
for (int i = 0; i < n; i++) d.add(impl.makeElement(i)); |
615 |
|
Iterator it = d.descendingIterator(); |
633 |
|
*/ |
634 |
|
public void testStreamForEach() throws Throwable { |
635 |
|
final Collection c = impl.emptyCollection(); |
470 |
– |
final AtomicLong count = new AtomicLong(0L); |
636 |
|
final Object x = impl.makeElement(1); |
637 |
|
final Object y = impl.makeElement(2); |
638 |
|
final ArrayList found = new ArrayList(); |
690 |
|
*/ |
691 |
|
public void testForEach() throws Throwable { |
692 |
|
final Collection c = impl.emptyCollection(); |
528 |
– |
final AtomicLong count = new AtomicLong(0L); |
693 |
|
final Object x = impl.makeElement(1); |
694 |
|
final Object y = impl.makeElement(2); |
695 |
|
final ArrayList found = new ArrayList(); |
714 |
|
assertTrue(found.isEmpty()); |
715 |
|
} |
716 |
|
|
717 |
+ |
/** TODO: promote to a common utility */ |
718 |
+ |
static <T> T chooseOne(T ... ts) { |
719 |
+ |
return ts[ThreadLocalRandom.current().nextInt(ts.length)]; |
720 |
+ |
} |
721 |
+ |
|
722 |
+ |
/** TODO: more random adders and removers */ |
723 |
+ |
static <E> Runnable adderRemover(Collection<E> c, E e) { |
724 |
+ |
return chooseOne( |
725 |
+ |
() -> { |
726 |
+ |
assertTrue(c.add(e)); |
727 |
+ |
assertTrue(c.contains(e)); |
728 |
+ |
assertTrue(c.remove(e)); |
729 |
+ |
assertFalse(c.contains(e)); |
730 |
+ |
}, |
731 |
+ |
() -> { |
732 |
+ |
assertTrue(c.add(e)); |
733 |
+ |
assertTrue(c.contains(e)); |
734 |
+ |
assertTrue(c.removeIf(x -> x == e)); |
735 |
+ |
assertFalse(c.contains(e)); |
736 |
+ |
}, |
737 |
+ |
() -> { |
738 |
+ |
assertTrue(c.add(e)); |
739 |
+ |
assertTrue(c.contains(e)); |
740 |
+ |
for (Iterator it = c.iterator();; ) |
741 |
+ |
if (it.next() == e) { |
742 |
+ |
try { it.remove(); } |
743 |
+ |
catch (UnsupportedOperationException ok) { |
744 |
+ |
c.remove(e); |
745 |
+ |
} |
746 |
+ |
break; |
747 |
+ |
} |
748 |
+ |
assertFalse(c.contains(e)); |
749 |
+ |
}); |
750 |
+ |
} |
751 |
+ |
|
752 |
+ |
/** |
753 |
+ |
* Concurrent Spliterators, once exhausted, stay exhausted. |
754 |
+ |
*/ |
755 |
+ |
public void testStickySpliteratorExhaustion() throws Throwable { |
756 |
+ |
if (!impl.isConcurrent()) return; |
757 |
+ |
if (!testImplementationDetails) return; |
758 |
+ |
final ThreadLocalRandom rnd = ThreadLocalRandom.current(); |
759 |
+ |
final Consumer alwaysThrows = e -> { throw new AssertionError(); }; |
760 |
+ |
final Collection c = impl.emptyCollection(); |
761 |
+ |
final Spliterator s = c.spliterator(); |
762 |
+ |
if (rnd.nextBoolean()) { |
763 |
+ |
assertFalse(s.tryAdvance(alwaysThrows)); |
764 |
+ |
} else { |
765 |
+ |
s.forEachRemaining(alwaysThrows); |
766 |
+ |
} |
767 |
+ |
final Object one = impl.makeElement(1); |
768 |
+ |
// Spliterator should not notice added element |
769 |
+ |
c.add(one); |
770 |
+ |
if (rnd.nextBoolean()) { |
771 |
+ |
assertFalse(s.tryAdvance(alwaysThrows)); |
772 |
+ |
} else { |
773 |
+ |
s.forEachRemaining(alwaysThrows); |
774 |
+ |
} |
775 |
+ |
} |
776 |
+ |
|
777 |
|
/** |
778 |
|
* Motley crew of threads concurrently randomly hammer the collection. |
779 |
|
*/ |
781 |
|
if (!impl.isConcurrent()) return; |
782 |
|
final ThreadLocalRandom rnd = ThreadLocalRandom.current(); |
783 |
|
final Collection c = impl.emptyCollection(); |
784 |
< |
final long testDurationMillis = timeoutMillis(); |
784 |
> |
final long testDurationMillis |
785 |
> |
= expensiveTests ? LONG_DELAY_MS : timeoutMillis(); |
786 |
|
final AtomicBoolean done = new AtomicBoolean(false); |
787 |
|
final Object one = impl.makeElement(1); |
788 |
|
final Object two = impl.makeElement(2); |
789 |
+ |
final Consumer checkSanity = x -> assertTrue(x == one || x == two); |
790 |
+ |
final Consumer<Object[]> checkArraySanity = array -> { |
791 |
+ |
// assertTrue(array.length <= 2); // duplicates are permitted |
792 |
+ |
for (Object x : array) assertTrue(x == one || x == two); |
793 |
+ |
}; |
794 |
|
final Object[] emptyArray = |
795 |
|
(Object[]) java.lang.reflect.Array.newInstance(one.getClass(), 0); |
796 |
|
final List<Future<?>> futures; |
797 |
|
final Phaser threadsStarted = new Phaser(1); // register this thread |
568 |
– |
final Consumer checkSanity = x -> assertTrue(x == one || x == two); |
798 |
|
final Runnable[] frobbers = { |
799 |
|
() -> c.forEach(checkSanity), |
800 |
|
() -> c.stream().forEach(checkSanity), |
810 |
|
do {} while (s.tryAdvance(checkSanity)); |
811 |
|
}, |
812 |
|
() -> { for (Object x : c) checkSanity.accept(x); }, |
813 |
< |
() -> { for (Object x : c.toArray()) checkSanity.accept(x); }, |
814 |
< |
() -> { for (Object x : c.toArray(emptyArray)) checkSanity.accept(x); }, |
813 |
> |
() -> checkArraySanity.accept(c.toArray()), |
814 |
> |
() -> checkArraySanity.accept(c.toArray(emptyArray)), |
815 |
|
() -> { |
816 |
< |
assertTrue(c.add(one)); |
817 |
< |
assertTrue(c.contains(one)); |
818 |
< |
assertTrue(c.remove(one)); |
819 |
< |
assertFalse(c.contains(one)); |
820 |
< |
}, |
821 |
< |
() -> { |
822 |
< |
assertTrue(c.add(two)); |
823 |
< |
assertTrue(c.contains(two)); |
824 |
< |
assertTrue(c.remove(two)); |
825 |
< |
assertFalse(c.contains(two)); |
826 |
< |
}, |
816 |
> |
Object[] a = new Object[5]; |
817 |
> |
Object three = impl.makeElement(3); |
818 |
> |
Arrays.fill(a, 0, a.length, three); |
819 |
> |
Object[] x = c.toArray(a); |
820 |
> |
if (x == a) |
821 |
> |
for (int i = 0; i < a.length && a[i] != null; i++) |
822 |
> |
checkSanity.accept(a[i]); |
823 |
> |
// A careful reading of the spec does not support: |
824 |
> |
// for (i++; i < a.length; i++) assertSame(three, a[i]); |
825 |
> |
else |
826 |
> |
checkArraySanity.accept(x); |
827 |
> |
}, |
828 |
> |
adderRemover(c, one), |
829 |
> |
adderRemover(c, two), |
830 |
|
}; |
831 |
|
final List<Runnable> tasks = |
832 |
|
Arrays.stream(frobbers) |
884 |
|
} |
885 |
|
} |
886 |
|
|
887 |
+ |
/** |
888 |
+ |
* Spliterator.getComparator throws IllegalStateException iff the |
889 |
+ |
* spliterator does not report SORTED. |
890 |
+ |
*/ |
891 |
+ |
public void testGetComparator_IllegalStateException() { |
892 |
+ |
Collection c = impl.emptyCollection(); |
893 |
+ |
Spliterator s = c.spliterator(); |
894 |
+ |
boolean reportsSorted = s.hasCharacteristics(Spliterator.SORTED); |
895 |
+ |
try { |
896 |
+ |
s.getComparator(); |
897 |
+ |
assertTrue(reportsSorted); |
898 |
+ |
} catch (IllegalStateException ex) { |
899 |
+ |
assertFalse(reportsSorted); |
900 |
+ |
} |
901 |
+ |
} |
902 |
+ |
|
903 |
+ |
public void testCollectionCopies() throws Exception { |
904 |
+ |
ThreadLocalRandom rnd = ThreadLocalRandom.current(); |
905 |
+ |
Collection c = impl.emptyCollection(); |
906 |
+ |
for (int n = rnd.nextInt(4); n--> 0; ) |
907 |
+ |
c.add(impl.makeElement(rnd.nextInt())); |
908 |
+ |
assertEquals(c, c); |
909 |
+ |
if (c instanceof List) |
910 |
+ |
assertCollectionsEquals(c, new ArrayList(c)); |
911 |
+ |
else if (c instanceof Set) |
912 |
+ |
assertCollectionsEquals(c, new HashSet(c)); |
913 |
+ |
else if (c instanceof Deque) |
914 |
+ |
assertCollectionsEquivalent(c, new ArrayDeque(c)); |
915 |
+ |
|
916 |
+ |
Collection clone = cloneableClone(c); |
917 |
+ |
if (clone != null) { |
918 |
+ |
assertSame(c.getClass(), clone.getClass()); |
919 |
+ |
assertCollectionsEquivalent(c, clone); |
920 |
+ |
} |
921 |
+ |
try { |
922 |
+ |
Collection serialClone = serialClonePossiblyFailing(c); |
923 |
+ |
assertSame(c.getClass(), serialClone.getClass()); |
924 |
+ |
assertCollectionsEquivalent(c, serialClone); |
925 |
+ |
} catch (java.io.NotSerializableException acceptable) {} |
926 |
+ |
} |
927 |
+ |
|
928 |
+ |
/** |
929 |
+ |
* TODO: move out of limbo |
930 |
+ |
* 8203662: remove increment of modCount from ArrayList and Vector replaceAll() |
931 |
+ |
*/ |
932 |
+ |
public void DISABLED_testReplaceAllIsNotStructuralModification() { |
933 |
+ |
Collection c = impl.emptyCollection(); |
934 |
+ |
if (!(c instanceof List)) |
935 |
+ |
return; |
936 |
+ |
List list = (List) c; |
937 |
+ |
ThreadLocalRandom rnd = ThreadLocalRandom.current(); |
938 |
+ |
for (int n = rnd.nextInt(2, 10); n--> 0; ) |
939 |
+ |
list.add(impl.makeElement(rnd.nextInt())); |
940 |
+ |
ArrayList copy = new ArrayList(list); |
941 |
+ |
int size = list.size(), half = size / 2; |
942 |
+ |
Iterator it = list.iterator(); |
943 |
+ |
for (int i = 0; i < half; i++) |
944 |
+ |
assertEquals(it.next(), copy.get(i)); |
945 |
+ |
list.replaceAll(n -> n); |
946 |
+ |
// ConcurrentModificationException must not be thrown here. |
947 |
+ |
for (int i = half; i < size; i++) |
948 |
+ |
assertEquals(it.next(), copy.get(i)); |
949 |
+ |
} |
950 |
+ |
|
951 |
|
// public void testCollection8DebugFail() { |
952 |
|
// fail(impl.klazz().getSimpleName()); |
953 |
|
// } |