| 25 |
|
import java.util.concurrent.Executors; |
| 26 |
|
import java.util.concurrent.ExecutorService; |
| 27 |
|
import java.util.concurrent.Future; |
| 28 |
+ |
import java.util.concurrent.Phaser; |
| 29 |
|
import java.util.concurrent.ThreadLocalRandom; |
| 30 |
|
import java.util.concurrent.atomic.AtomicBoolean; |
| 31 |
|
import java.util.concurrent.atomic.AtomicLong; |
| 32 |
|
import java.util.concurrent.atomic.AtomicReference; |
| 33 |
|
import java.util.function.Consumer; |
| 34 |
|
import java.util.function.Predicate; |
| 35 |
+ |
import java.util.stream.Collectors; |
| 36 |
|
|
| 37 |
|
import junit.framework.Test; |
| 38 |
|
|
| 304 |
|
switch (rnd.nextInt(4)) { |
| 305 |
|
case 0: survivors.addAll(c); break; |
| 306 |
|
case 1: survivors.addAll(Arrays.asList(c.toArray())); break; |
| 307 |
< |
case 2: c.forEach(e -> survivors.add(e)); break; |
| 307 |
> |
case 2: c.forEach(survivors::add); break; |
| 308 |
|
case 3: for (Object e : c) survivors.add(e); break; |
| 309 |
|
} |
| 310 |
|
assertTrue(orig.containsAll(accepts)); |
| 355 |
|
ArrayList forEached = new ArrayList(); |
| 356 |
|
ArrayList removeIfed = new ArrayList(); |
| 357 |
|
for (Object x : c) iterated.add(x); |
| 358 |
< |
c.iterator().forEachRemaining(e -> iteratedForEachRemaining.add(e)); |
| 358 |
> |
c.iterator().forEachRemaining(iteratedForEachRemaining::add); |
| 359 |
|
for (Spliterator s = c.spliterator(); |
| 360 |
< |
s.tryAdvance(e -> tryAdvanced.add(e)); ) {} |
| 361 |
< |
c.spliterator().forEachRemaining(e -> spliterated.add(e)); |
| 362 |
< |
c.forEach(e -> forEached.add(e)); |
| 360 |
> |
s.tryAdvance(tryAdvanced::add); ) {} |
| 361 |
> |
c.spliterator().forEachRemaining(spliterated::add); |
| 362 |
> |
c.forEach(forEached::add); |
| 363 |
|
c.removeIf(e -> { removeIfed.add(e); return false; }); |
| 364 |
|
boolean ordered = |
| 365 |
|
c.spliterator().hasCharacteristics(Spliterator.ORDERED); |
| 534 |
|
assertTrue(found.isEmpty()); |
| 535 |
|
} |
| 536 |
|
|
| 537 |
< |
public void testForEachConcurrentStressTest() throws Throwable { |
| 537 |
> |
/** |
| 538 |
> |
* Motley crew of threads concurrently randomly hammer the collection. |
| 539 |
> |
*/ |
| 540 |
> |
public void testDetectRaces() throws Throwable { |
| 541 |
|
if (!impl.isConcurrent()) return; |
| 542 |
+ |
final ThreadLocalRandom rnd = ThreadLocalRandom.current(); |
| 543 |
|
final Collection c = impl.emptyCollection(); |
| 544 |
|
final long testDurationMillis = timeoutMillis(); |
| 545 |
|
final AtomicBoolean done = new AtomicBoolean(false); |
| 546 |
< |
final Object elt = impl.makeElement(1); |
| 547 |
< |
final Future<?> f1, f2; |
| 546 |
> |
final Object one = impl.makeElement(1); |
| 547 |
> |
final Object two = impl.makeElement(2); |
| 548 |
> |
final List<Future<?>> futures; |
| 549 |
> |
final Phaser threadsStarted = new Phaser(1); // register this thread |
| 550 |
> |
final Runnable[] frobbers = { |
| 551 |
> |
() -> c.forEach(x -> assertTrue(x == one || x == two)), |
| 552 |
> |
() -> c.stream().forEach(x -> assertTrue(x == one || x == two)), |
| 553 |
> |
() -> c.spliterator().trySplit(), |
| 554 |
> |
() -> { |
| 555 |
> |
Spliterator s = c.spliterator(); |
| 556 |
> |
s.tryAdvance(x -> assertTrue(x == one || x == two)); |
| 557 |
> |
s.trySplit(); |
| 558 |
> |
}, |
| 559 |
> |
() -> { |
| 560 |
> |
Spliterator s = c.spliterator(); |
| 561 |
> |
do {} while (s.tryAdvance(x -> assertTrue(x == one || x == two))); |
| 562 |
> |
}, |
| 563 |
> |
() -> { |
| 564 |
> |
for (Object x : c) assertTrue(x == one || x == two); |
| 565 |
> |
}, |
| 566 |
> |
() -> { |
| 567 |
> |
assertTrue(c.add(one)); |
| 568 |
> |
assertTrue(c.contains(one)); |
| 569 |
> |
assertTrue(c.remove(one)); |
| 570 |
> |
assertFalse(c.contains(one)); |
| 571 |
> |
}, |
| 572 |
> |
() -> { |
| 573 |
> |
assertTrue(c.add(two)); |
| 574 |
> |
assertTrue(c.contains(two)); |
| 575 |
> |
assertTrue(c.remove(two)); |
| 576 |
> |
assertFalse(c.contains(two)); |
| 577 |
> |
}, |
| 578 |
> |
}; |
| 579 |
> |
final List<Runnable> tasks = |
| 580 |
> |
Arrays.stream(frobbers) |
| 581 |
> |
.filter(task -> rnd.nextBoolean()) // random subset |
| 582 |
> |
.map(task -> (Runnable) () -> { |
| 583 |
> |
threadsStarted.arriveAndAwaitAdvance(); |
| 584 |
> |
while (!done.get()) |
| 585 |
> |
task.run(); |
| 586 |
> |
}) |
| 587 |
> |
.collect(Collectors.toList()); |
| 588 |
|
final ExecutorService pool = Executors.newCachedThreadPool(); |
| 589 |
|
try (PoolCleaner cleaner = cleaner(pool, done)) { |
| 590 |
< |
final CountDownLatch threadsStarted = new CountDownLatch(2); |
| 591 |
< |
Runnable checkElt = () -> { |
| 592 |
< |
threadsStarted.countDown(); |
| 593 |
< |
while (!done.get()) |
| 594 |
< |
c.forEach(x -> assertSame(x, elt)); }; |
| 549 |
< |
Runnable addRemove = () -> { |
| 550 |
< |
threadsStarted.countDown(); |
| 551 |
< |
while (!done.get()) { |
| 552 |
< |
assertTrue(c.add(elt)); |
| 553 |
< |
assertTrue(c.remove(elt)); |
| 554 |
< |
}}; |
| 555 |
< |
f1 = pool.submit(checkElt); |
| 556 |
< |
f2 = pool.submit(addRemove); |
| 590 |
> |
threadsStarted.bulkRegister(tasks.size()); |
| 591 |
> |
futures = tasks.stream() |
| 592 |
> |
.map(pool::submit) |
| 593 |
> |
.collect(Collectors.toList()); |
| 594 |
> |
threadsStarted.arriveAndDeregister(); |
| 595 |
|
Thread.sleep(testDurationMillis); |
| 596 |
|
} |
| 597 |
< |
assertNull(f1.get(0L, MILLISECONDS)); |
| 598 |
< |
assertNull(f2.get(0L, MILLISECONDS)); |
| 597 |
> |
for (Future future : futures) |
| 598 |
> |
assertNull(future.get(0L, MILLISECONDS)); |
| 599 |
|
} |
| 600 |
|
|
| 601 |
|
// public void testCollection8DebugFail() { |
