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root/jsr166/jsr166/src/test/tck/Collection8Test.java

Comparing jsr166/src/test/tck/Collection8Test.java (file contents):
Revision 1.41 by jsr166, Mon Dec 12 03:50:15 2016 UTC vs.
Revision 1.54 by jsr166, Sun May 6 22:33:06 2018 UTC

#	Line 8 | Line 8
8		import static java.util.concurrent.TimeUnit.HOURS;
9		import static java.util.concurrent.TimeUnit.MILLISECONDS;
10
11	+	import java.util.ArrayDeque;
12		import java.util.ArrayList;
13		import java.util.Arrays;
14		import java.util.Collection;
15		import java.util.Collections;
16	+	import java.util.ConcurrentModificationException;
17		import java.util.Deque;
18		import java.util.HashSet;
19		import java.util.Iterator;
20		import java.util.List;
21		import java.util.NoSuchElementException;
22		import java.util.Queue;
23	+	import java.util.Set;
24		import java.util.Spliterator;
25		import java.util.concurrent.BlockingDeque;
26		import java.util.concurrent.BlockingQueue;
#	Line 58 | Line 61 | public class Collection8Test extends JSR
61
62		Object bomb() {
63		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		}
69
70		/** Checks properties of empty collections. */
#	Line 91 | Line 95 | public class Collection8Test extends JSR
95		assertTrue(c.isEmpty());
96		assertEquals(0, c.size());
97		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		{
116		Object[] a = c.toArray();
117		assertEquals(0, a.length);
#	Line 139 | Line 160 | public class Collection8Test extends JSR
160		}
161		if (c instanceof BlockingQueue) {
162		BlockingQueue q = (BlockingQueue) c;
163	<	assertNull(q.poll(0L, MILLISECONDS));
163	>	assertNull(q.poll(randomExpiredTimeout(), randomTimeUnit()));
164		}
165		if (c instanceof BlockingDeque) {
166		BlockingDeque q = (BlockingDeque) c;
167	<	assertNull(q.pollFirst(0L, MILLISECONDS));
168	<	assertNull(q.pollLast(0L, MILLISECONDS));
167	>	assertNull(q.pollFirst(randomExpiredTimeout(), randomTimeUnit()));
168	>	assertNull(q.pollLast(randomExpiredTimeout(), randomTimeUnit()));
169		}
170		}
171
#	Line 251 | Line 272 | public class Collection8Test extends JSR
272		() -> d.pop(),
273		() -> d.descendingIterator().next());
274		}
275	+	if (c instanceof List) {
276	+	List x = (List) c;
277	+	assertThrows(
278	+	NoSuchElementException.class,
279	+	() -> x.iterator().next(),
280	+	() -> x.listIterator().next(),
281	+	() -> x.listIterator(0).next(),
282	+	() -> x.listIterator().previous(),
283	+	() -> x.listIterator(0).previous());
284	+	}
285		}
286
287		public void testRemoveIf() {
#	Line 515 | Line 546 | public class Collection8Test extends JSR
546		}
547
548		/**
549	+	* Iterator.forEachRemaining has same behavior as Iterator's
550	+	* default implementation.
551	+	*/
552	+	public void testForEachRemainingConsistentWithDefaultImplementation() {
553	+	Collection c = impl.emptyCollection();
554	+	if (!testImplementationDetails
555	+	|| c.getClass() == java.util.LinkedList.class)
556	+	return;
557	+	ThreadLocalRandom rnd = ThreadLocalRandom.current();
558	+	int n = 1 + rnd.nextInt(3);
559	+	for (int i = 0; i < n; i++) c.add(impl.makeElement(i));
560	+	ArrayList iterated = new ArrayList();
561	+	ArrayList iteratedForEachRemaining = new ArrayList();
562	+	Iterator it1 = c.iterator();
563	+	Iterator it2 = c.iterator();
564	+	assertTrue(it1.hasNext());
565	+	assertTrue(it2.hasNext());
566	+	c.clear();
567	+	Object r1, r2;
568	+	try {
569	+	while (it1.hasNext()) iterated.add(it1.next());
570	+	r1 = iterated;
571	+	} catch (ConcurrentModificationException ex) {
572	+	r1 = ConcurrentModificationException.class;
573	+	assertFalse(impl.isConcurrent());
574	+	}
575	+	try {
576	+	it2.forEachRemaining(iteratedForEachRemaining::add);
577	+	r2 = iteratedForEachRemaining;
578	+	} catch (ConcurrentModificationException ex) {
579	+	r2 = ConcurrentModificationException.class;
580	+	assertFalse(impl.isConcurrent());
581	+	}
582	+	assertEquals(r1, r2);
583	+	}
584	+
585	+	/**
586		* Calling Iterator#remove() after Iterator#forEachRemaining
587		* should (maybe) remove last element
588		*/
589		public void testRemoveAfterForEachRemaining() {
590		Collection c = impl.emptyCollection();
591		ThreadLocalRandom rnd = ThreadLocalRandom.current();
592	+	ArrayList copy = new ArrayList();
593	+	boolean ordered = c.spliterator().hasCharacteristics(Spliterator.ORDERED);
594		testCollection: {
595		int n = 3 + rnd.nextInt(2);
596	<	for (int i = 0; i < n; i++) c.add(impl.makeElement(i));
596	>	for (int i = 0; i < n; i++) {
597	>	Object x = impl.makeElement(i);
598	>	c.add(x);
599	>	copy.add(x);
600	>	}
601		Iterator it = c.iterator();
602	<	assertTrue(it.hasNext());
603	<	assertEquals(impl.makeElement(0), it.next());
604	<	assertTrue(it.hasNext());
605	<	assertEquals(impl.makeElement(1), it.next());
606	<	it.forEachRemaining(e -> assertTrue(c.contains(e)));
602	>	if (ordered) {
603	>	if (rnd.nextBoolean()) assertTrue(it.hasNext());
604	>	assertEquals(impl.makeElement(0), it.next());
605	>	if (rnd.nextBoolean()) assertTrue(it.hasNext());
606	>	assertEquals(impl.makeElement(1), it.next());
607	>	} else {
608	>	if (rnd.nextBoolean()) assertTrue(it.hasNext());
609	>	assertTrue(copy.contains(it.next()));
610	>	if (rnd.nextBoolean()) assertTrue(it.hasNext());
611	>	assertTrue(copy.contains(it.next()));
612	>	}
613	>	if (rnd.nextBoolean()) assertTrue(it.hasNext());
614	>	it.forEachRemaining(
615	>	e -> {
616	>	assertTrue(c.contains(e));
617	>	assertTrue(copy.contains(e));});
618		if (testImplementationDetails) {
619		if (c instanceof java.util.concurrent.ArrayBlockingQueue) {
620		assertIteratorExhausted(it);
#	Line 539 | Line 624 | public class Collection8Test extends JSR
624		break testCollection;
625		}
626		assertEquals(n - 1, c.size());
627	<	for (int i = 0; i < n - 1; i++)
628	<	assertTrue(c.contains(impl.makeElement(i)));
629	<	assertFalse(c.contains(impl.makeElement(n - 1)));
627	>	if (ordered) {
628	>	for (int i = 0; i < n - 1; i++)
629	>	assertTrue(c.contains(impl.makeElement(i)));
630	>	assertFalse(c.contains(impl.makeElement(n - 1)));
631	>	}
632		}
633		}
634		}
635		if (c instanceof Deque) {
636		Deque d = (Deque) impl.emptyCollection();
637	+	assertTrue(ordered);
638		int n = 3 + rnd.nextInt(2);
639		for (int i = 0; i < n; i++) d.add(impl.makeElement(i));
640		Iterator it = d.descendingIterator();
#	Line 689 | Line 777 | public class Collection8Test extends JSR
777		}
778
779		/**
780	+	* Concurrent Spliterators, once exhausted, stay exhausted.
781	+	*/
782	+	public void testStickySpliteratorExhaustion() throws Throwable {
783	+	if (!impl.isConcurrent()) return;
784	+	if (!testImplementationDetails) return;
785	+	final ThreadLocalRandom rnd = ThreadLocalRandom.current();
786	+	final Consumer alwaysThrows = e -> { throw new AssertionError(); };
787	+	final Collection c = impl.emptyCollection();
788	+	final Spliterator s = c.spliterator();
789	+	if (rnd.nextBoolean()) {
790	+	assertFalse(s.tryAdvance(alwaysThrows));
791	+	} else {
792	+	s.forEachRemaining(alwaysThrows);
793	+	}
794	+	final Object one = impl.makeElement(1);
795	+	// Spliterator should not notice added element
796	+	c.add(one);
797	+	if (rnd.nextBoolean()) {
798	+	assertFalse(s.tryAdvance(alwaysThrows));
799	+	} else {
800	+	s.forEachRemaining(alwaysThrows);
801	+	}
802	+	}
803	+
804	+	/**
805		* Motley crew of threads concurrently randomly hammer the collection.
806		*/
807		public void testDetectRaces() throws Throwable {
#	Line 814 | Line 927 | public class Collection8Test extends JSR
927		}
928		}
929
930	+	public void testCollectionCopies() throws Exception {
931	+	ThreadLocalRandom rnd = ThreadLocalRandom.current();
932	+	Collection c = impl.emptyCollection();
933	+	for (int n = rnd.nextInt(4); n--> 0; )
934	+	c.add(impl.makeElement(rnd.nextInt()));
935	+	assertEquals(c, c);
936	+	if (c instanceof List)
937	+	assertCollectionsEquals(c, new ArrayList(c));
938	+	else if (c instanceof Set)
939	+	assertCollectionsEquals(c, new HashSet(c));
940	+	else if (c instanceof Deque)
941	+	assertCollectionsEquivalent(c, new ArrayDeque(c));
942	+
943	+	Collection clone = cloneableClone(c);
944	+	if (clone != null) {
945	+	assertSame(c.getClass(), clone.getClass());
946	+	assertCollectionsEquivalent(c, clone);
947	+	}
948	+	try {
949	+	Collection serialClone = serialClonePossiblyFailing(c);
950	+	assertSame(c.getClass(), serialClone.getClass());
951	+	assertCollectionsEquivalent(c, serialClone);
952	+	} catch (java.io.NotSerializableException acceptable) {}
953	+	}
954	+
955	+	public void testReplaceAllIsNotStructuralModification() {
956	+	Collection c = impl.emptyCollection();
957	+	if (!(c instanceof List))
958	+	return;
959	+	List list = (List) c;
960	+	ThreadLocalRandom rnd = ThreadLocalRandom.current();
961	+	for (int n = rnd.nextInt(2, 10); n--> 0; )
962	+	list.add(impl.makeElement(rnd.nextInt()));
963	+	ArrayList copy = new ArrayList(list);
964	+	int size = list.size(), half = size / 2;
965	+	Iterator it = list.iterator();
966	+	for (int i = 0; i < half; i++)
967	+	assertEquals(it.next(), copy.get(i));
968	+	list.replaceAll(n -> n);
969	+	// ConcurrentModificationException must not be thrown here.
970	+	for (int i = half; i < size; i++)
971	+	assertEquals(it.next(), copy.get(i));
972	+	}
973	+
974		//     public void testCollection8DebugFail() {
975		//         fail(impl.klazz().getSimpleName());
976		//     }

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