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Comparing jsr166/src/test/tck/CopyOnWriteArrayListTest.java (file contents):
Revision 1.20 by jsr166, Fri May 27 19:09:55 2011 UTC vs.
Revision 1.32 by jsr166, Sat Jan 17 22:55:06 2015 UTC

#	Line 6 | Line 6
6		* Pat Fisher, Mike Judd.
7		*/
8
9	<	import junit.framework.*;
10	<	import java.util.*;
11	<	import java.util.concurrent.*;
12	<	import java.io.*;
9	>	import java.util.ArrayList;
10	>	import java.util.Arrays;
11	>	import java.util.Collection;
12	>	import java.util.Collections;
13	>	import java.util.Iterator;
14	>	import java.util.LinkedList;
15	>	import java.util.List;
16	>	import java.util.ListIterator;
17	>	import java.util.NoSuchElementException;
18	>	import java.util.Vector;
19	>	import java.util.concurrent.CopyOnWriteArrayList;
20	>
21	>	import junit.framework.Test;
22	>	import junit.framework.TestSuite;
23
24		public class CopyOnWriteArrayListTest extends JSR166TestCase {
25
#	Line 21 | Line 31 | public class CopyOnWriteArrayListTest ex
31		return new TestSuite(CopyOnWriteArrayListTest.class);
32		}
33
34	<	static CopyOnWriteArrayList populatedArray(int n) {
35	<	CopyOnWriteArrayList a = new CopyOnWriteArrayList();
34	>	static CopyOnWriteArrayList<Integer> populatedArray(int n) {
35	>	CopyOnWriteArrayList<Integer> a = new CopyOnWriteArrayList<Integer>();
36		assertTrue(a.isEmpty());
37	<	for (int i = 0; i < n; ++i)
38	<	a.add(new Integer(i));
37	>	for (int i = 0; i < n; i++)
38	>	a.add(i);
39		assertFalse(a.isEmpty());
40		assertEquals(n, a.size());
41		return a;
42		}
43
44	+	static CopyOnWriteArrayList<Integer> populatedArray(Integer[] elements) {
45	+	CopyOnWriteArrayList<Integer> a = new CopyOnWriteArrayList<Integer>();
46	+	assertTrue(a.isEmpty());
47	+	for (int i = 0; i < elements.length; i++)
48	+	a.add(elements[i]);
49	+	assertFalse(a.isEmpty());
50	+	assertEquals(elements.length, a.size());
51	+	return a;
52	+	}
53
54		/**
55		* a new list is empty
#	Line 64 | Line 83 | public class CopyOnWriteArrayListTest ex
83		assertEquals(ints[i], a.get(i));
84		}
85
67	–
86		/**
87		* addAll adds each element from the given collection
88		*/
#	Line 119 | Line 137 | public class CopyOnWriteArrayListTest ex
137		assertEquals(0, full.size());
138		}
139
122	–
140		/**
141		* Cloned list is equal
142		*/
#	Line 174 | Line 191 | public class CopyOnWriteArrayListTest ex
191		assertEquals(a.hashCode(), b.hashCode());
192		}
193
177	–
194		/**
195		* containsAll returns true for collection with subset of elements
196		*/
#	Line 226 | Line 242 | public class CopyOnWriteArrayListTest ex
242		}
243
244		/**
245	<	* iterator() returns an iterator containing the elements of the list
245	>	* iterator() returns an iterator containing the elements of the
246	>	* list in insertion order
247		*/
248		public void testIterator() {
249	<	CopyOnWriteArrayList full = populatedArray(SIZE);
250	<	Iterator i = full.iterator();
251	<	int j;
252	<	for (j = 0; i.hasNext(); j++)
253	<	assertEquals(j, i.next());
254	<	assertEquals(SIZE, j);
249	>	Collection empty = new CopyOnWriteArrayList();
250	>	assertFalse(empty.iterator().hasNext());
251	>	try {
252	>	empty.iterator().next();
253	>	shouldThrow();
254	>	} catch (NoSuchElementException success) {}
255	>
256	>	Integer[] elements = new Integer[SIZE];
257	>	for (int i = 0; i < SIZE; i++)
258	>	elements[i] = i;
259	>	Collections.shuffle(Arrays.asList(elements));
260	>	Collection<Integer> full = populatedArray(elements);
261	>
262	>	Iterator it = full.iterator();
263	>	for (int j = 0; j < SIZE; j++) {
264	>	assertTrue(it.hasNext());
265	>	assertEquals(elements[j], it.next());
266	>	}
267	>	assertIteratorExhausted(it);
268	>	}
269	>
270	>	/**
271	>	* iterator of empty collection has no elements
272	>	*/
273	>	public void testEmptyIterator() {
274	>	Collection c = new CopyOnWriteArrayList();
275	>	assertIteratorExhausted(c.iterator());
276		}
277
278		/**
#	Line 254 | Line 292 | public class CopyOnWriteArrayListTest ex
292		* toString contains toString of elements
293		*/
294		public void testToString() {
295	+	assertEquals("[]", new CopyOnWriteArrayList().toString());
296		CopyOnWriteArrayList full = populatedArray(3);
297		String s = full.toString();
298	<	for (int i = 0; i < 3; ++i) {
298	>	for (int i = 0; i < 3; ++i)
299		assertTrue(s.contains(String.valueOf(i)));
300	<	}
300	>	assertEquals(new ArrayList(full).toString(),
301	>	full.toString());
302		}
303
304		/**
#	Line 275 | Line 315 | public class CopyOnWriteArrayListTest ex
315		/**
316		* lastIndexOf returns the index from the given starting point
317		*/
318	<	public void testlastIndexOf2() {
318	>	public void testLastIndexOf2() {
319		CopyOnWriteArrayList full = populatedArray(3);
320		full.add(one);
321		full.add(three);
#	Line 308 | Line 348 | public class CopyOnWriteArrayListTest ex
348		}
349
350		/**
351	<	* remove removes and returns the object at the given index
351	>	* remove(int) removes and returns the object at the given index
352		*/
353	<	public void testRemove() {
354	<	CopyOnWriteArrayList full = populatedArray(3);
355	<	assertEquals(2, full.remove(2));
356	<	assertEquals(2, full.size());
353	>	public void testRemove_int() {
354	>	int SIZE = 3;
355	>	for (int i = 0; i < SIZE; i++) {
356	>	CopyOnWriteArrayList full = populatedArray(SIZE);
357	>	assertEquals(i, full.remove(i));
358	>	assertEquals(SIZE - 1, full.size());
359	>	assertFalse(full.contains(new Integer(i)));
360	>	}
361	>	}
362	>
363	>	/**
364	>	* remove(Object) removes the object if found and returns true
365	>	*/
366	>	public void testRemove_Object() {
367	>	int SIZE = 3;
368	>	for (int i = 0; i < SIZE; i++) {
369	>	CopyOnWriteArrayList full = populatedArray(SIZE);
370	>	assertFalse(full.remove(new Integer(-42)));
371	>	assertTrue(full.remove(new Integer(i)));
372	>	assertEquals(SIZE - 1, full.size());
373	>	assertFalse(full.contains(new Integer(i)));
374	>	}
375	>	CopyOnWriteArrayList x = new CopyOnWriteArrayList(Arrays.asList(4, 5, 6));
376	>	assertTrue(x.remove(new Integer(6)));
377	>	assertEquals(x, Arrays.asList(4, 5));
378	>	assertTrue(x.remove(new Integer(4)));
379	>	assertEquals(x, Arrays.asList(5));
380	>	assertTrue(x.remove(new Integer(5)));
381	>	assertEquals(x, Arrays.asList());
382	>	assertFalse(x.remove(new Integer(5)));
383		}
384
385		/**
#	Line 348 | Line 414 | public class CopyOnWriteArrayListTest ex
414		}
415
416		/**
417	<	* toArray returns an Object array containing all elements from the list
417	>	* toArray() returns an Object array containing all elements from
418	>	* the list in insertion order
419		*/
420		public void testToArray() {
421	<	CopyOnWriteArrayList full = populatedArray(3);
422	<	Object[] o = full.toArray();
423	<	assertEquals(3, o.length);
424	<	assertEquals(0, o[0]);
425	<	assertEquals(1, o[1]);
426	<	assertEquals(2, o[2]);
421	>	Object[] a = new CopyOnWriteArrayList().toArray();
422	>	assertTrue(Arrays.equals(new Object[0], a));
423	>	assertSame(Object[].class, a.getClass());
424	>
425	>	Integer[] elements = new Integer[SIZE];
426	>	for (int i = 0; i < SIZE; i++)
427	>	elements[i] = i;
428	>	Collections.shuffle(Arrays.asList(elements));
429	>	Collection<Integer> full = populatedArray(elements);
430	>
431	>	assertTrue(Arrays.equals(elements, full.toArray()));
432	>	assertSame(Object[].class, full.toArray().getClass());
433		}
434
435		/**
436	<	* toArray returns an Integer array containing all elements from
437	<	* the list
436	>	* toArray(Integer array) returns an Integer array containing all
437	>	* elements from the list in insertion order
438		*/
439		public void testToArray2() {
440	<	CopyOnWriteArrayList full = populatedArray(3);
441	<	Integer[] i = new Integer[3];
442	<	i = (Integer[])full.toArray(i);
443	<	assertEquals(3, i.length);
444	<	assertEquals(0, i[0].intValue());
372	<	assertEquals(1, i[1].intValue());
373	<	assertEquals(2, i[2].intValue());
374	<	}
440	>	Collection empty = new CopyOnWriteArrayList();
441	>	Integer[] a;
442	>
443	>	a = new Integer[0];
444	>	assertSame(a, empty.toArray(a));
445
446	+	a = new Integer[SIZE/2];
447	+	Arrays.fill(a, 42);
448	+	assertSame(a, empty.toArray(a));
449	+	assertNull(a[0]);
450	+	for (int i = 1; i < a.length; i++)
451	+	assertEquals(42, (int) a[i]);
452	+
453	+	Integer[] elements = new Integer[SIZE];
454	+	for (int i = 0; i < SIZE; i++)
455	+	elements[i] = i;
456	+	Collections.shuffle(Arrays.asList(elements));
457	+	Collection<Integer> full = populatedArray(elements);
458	+
459	+	Arrays.fill(a, 42);
460	+	assertTrue(Arrays.equals(elements, full.toArray(a)));
461	+	for (int i = 0; i < a.length; i++)
462	+	assertEquals(42, (int) a[i]);
463	+	assertSame(Integer[].class, full.toArray(a).getClass());
464	+
465	+	a = new Integer[SIZE];
466	+	Arrays.fill(a, 42);
467	+	assertSame(a, full.toArray(a));
468	+	assertTrue(Arrays.equals(elements, a));
469	+
470	+	a = new Integer[2*SIZE];
471	+	Arrays.fill(a, 42);
472	+	assertSame(a, full.toArray(a));
473	+	assertTrue(Arrays.equals(elements, Arrays.copyOf(a, SIZE)));
474	+	assertNull(a[SIZE]);
475	+	for (int i = SIZE + 1; i < a.length; i++)
476	+	assertEquals(42, (int) a[i]);
477	+	}
478
479		/**
480		* sublists contains elements at indexes offset from their base
#	Line 390 | Line 492 | public class CopyOnWriteArrayListTest ex
492		}
493
494		List s = a.subList(2, 5);
495	<	assertEquals(s.size(), 3);
495	>	assertEquals(3, s.size());
496		s.set(2, m1);
497		assertEquals(a.get(4), m1);
498		s.clear();
499	<	assertEquals(a.size(), 7);
499	>	assertEquals(7, a.size());
500		}
501
502		// Exception tests
#	Line 404 | Line 506 | public class CopyOnWriteArrayListTest ex
506		* can not store the objects inside the list
507		*/
508		public void testToArray_ArrayStoreException() {
509	+	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
510	+	c.add("zfasdfsdf");
511	+	c.add("asdadasd");
512		try {
408	–	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
409	–	c.add("zfasdfsdf");
410	–	c.add("asdadasd");
513		c.toArray(new Long[5]);
514		shouldThrow();
515		} catch (ArrayStoreException success) {}
#	Line 417 | Line 519 | public class CopyOnWriteArrayListTest ex
519		* get throws an IndexOutOfBoundsException on a negative index
520		*/
521		public void testGet1_IndexOutOfBoundsException() {
522	<	try {
523	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
524	<	c.get(-1);
525	<	shouldThrow();
526	<	} catch (IndexOutOfBoundsException success) {}
522	>	CopyOnWriteArrayList c = populatedArray(5);
523	>	List[] lists = { c, c.subList(1, c.size() - 1) };
524	>	for (List list : lists) {
525	>	try {
526	>	list.get(-1);
527	>	shouldThrow();
528	>	} catch (IndexOutOfBoundsException success) {}
529	>	}
530		}
531
532		/**
533		* get throws an IndexOutOfBoundsException on a too high index
534		*/
535		public void testGet2_IndexOutOfBoundsException() {
536	<	try {
537	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
538	<	c.add("asdasd");
539	<	c.add("asdad");
540	<	c.get(100);
541	<	shouldThrow();
542	<	} catch (IndexOutOfBoundsException success) {}
536	>	CopyOnWriteArrayList c = populatedArray(5);
537	>	List[] lists = { c, c.subList(1, c.size() - 1) };
538	>	for (List list : lists) {
539	>	try {
540	>	list.get(list.size());
541	>	shouldThrow();
542	>	} catch (IndexOutOfBoundsException success) {}
543	>	}
544		}
545
546		/**
547		* set throws an IndexOutOfBoundsException on a negative index
548		*/
549		public void testSet1_IndexOutOfBoundsException() {
550	<	try {
551	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
552	<	c.set(-1,"qwerty");
553	<	shouldThrow();
554	<	} catch (IndexOutOfBoundsException success) {}
550	>	CopyOnWriteArrayList c = populatedArray(5);
551	>	List[] lists = { c, c.subList(1, c.size() - 1) };
552	>	for (List list : lists) {
553	>	try {
554	>	list.set(-1, "qwerty");
555	>	shouldThrow();
556	>	} catch (IndexOutOfBoundsException success) {}
557	>	}
558		}
559
560		/**
561		* set throws an IndexOutOfBoundsException on a too high index
562		*/
563		public void testSet2() {
564	<	try {
565	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
566	<	c.add("asdasd");
567	<	c.add("asdad");
568	<	c.set(100, "qwerty");
569	<	shouldThrow();
570	<	} catch (IndexOutOfBoundsException success) {}
564	>	CopyOnWriteArrayList c = populatedArray(5);
565	>	List[] lists = { c, c.subList(1, c.size() - 1) };
566	>	for (List list : lists) {
567	>	try {
568	>	list.set(list.size(), "qwerty");
569	>	shouldThrow();
570	>	} catch (IndexOutOfBoundsException success) {}
571	>	}
572		}
573
574		/**
575		* add throws an IndexOutOfBoundsException on a negative index
576		*/
577		public void testAdd1_IndexOutOfBoundsException() {
578	<	try {
579	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
580	<	c.add(-1,"qwerty");
581	<	shouldThrow();
582	<	} catch (IndexOutOfBoundsException success) {}
578	>	CopyOnWriteArrayList c = populatedArray(5);
579	>	List[] lists = { c, c.subList(1, c.size() - 1) };
580	>	for (List list : lists) {
581	>	try {
582	>	list.add(-1, "qwerty");
583	>	shouldThrow();
584	>	} catch (IndexOutOfBoundsException success) {}
585	>	}
586		}
587
588		/**
589		* add throws an IndexOutOfBoundsException on a too high index
590		*/
591		public void testAdd2_IndexOutOfBoundsException() {
592	<	try {
593	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
594	<	c.add("asdasd");
595	<	c.add("asdasdasd");
596	<	c.add(100, "qwerty");
597	<	shouldThrow();
598	<	} catch (IndexOutOfBoundsException success) {}
592	>	CopyOnWriteArrayList c = populatedArray(5);
593	>	List[] lists = { c, c.subList(1, c.size() - 1) };
594	>	for (List list : lists) {
595	>	try {
596	>	list.add(list.size() + 1, "qwerty");
597	>	shouldThrow();
598	>	} catch (IndexOutOfBoundsException success) {}
599	>	}
600		}
601
602		/**
603		* remove throws an IndexOutOfBoundsException on a negative index
604		*/
605		public void testRemove1_IndexOutOfBounds() {
606	<	try {
607	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
608	<	c.remove(-1);
609	<	shouldThrow();
610	<	} catch (IndexOutOfBoundsException success) {}
606	>	CopyOnWriteArrayList c = populatedArray(5);
607	>	List[] lists = { c, c.subList(1, c.size() - 1) };
608	>	for (List list : lists) {
609	>	try {
610	>	list.remove(-1);
611	>	shouldThrow();
612	>	} catch (IndexOutOfBoundsException success) {}
613	>	}
614		}
615
616		/**
617		* remove throws an IndexOutOfBoundsException on a too high index
618		*/
619		public void testRemove2_IndexOutOfBounds() {
620	<	try {
621	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
622	<	c.add("asdasd");
623	<	c.add("adasdasd");
624	<	c.remove(100);
625	<	shouldThrow();
626	<	} catch (IndexOutOfBoundsException success) {}
620	>	CopyOnWriteArrayList c = populatedArray(5);
621	>	List[] lists = { c, c.subList(1, c.size() - 1) };
622	>	for (List list : lists) {
623	>	try {
624	>	list.remove(list.size());
625	>	shouldThrow();
626	>	} catch (IndexOutOfBoundsException success) {}
627	>	}
628		}
629
630		/**
631		* addAll throws an IndexOutOfBoundsException on a negative index
632		*/
633		public void testAddAll1_IndexOutOfBoundsException() {
634	<	try {
635	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
636	<	c.addAll(-1,new LinkedList());
637	<	shouldThrow();
638	<	} catch (IndexOutOfBoundsException success) {}
634	>	CopyOnWriteArrayList c = populatedArray(5);
635	>	List[] lists = { c, c.subList(1, c.size() - 1) };
636	>	for (List list : lists) {
637	>	try {
638	>	list.addAll(-1, new LinkedList());
639	>	shouldThrow();
640	>	} catch (IndexOutOfBoundsException success) {}
641	>	}
642		}
643
644		/**
645		* addAll throws an IndexOutOfBoundsException on a too high index
646		*/
647		public void testAddAll2_IndexOutOfBoundsException() {
648	<	try {
649	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
650	<	c.add("asdasd");
651	<	c.add("asdasdasd");
652	<	c.addAll(100, new LinkedList());
653	<	shouldThrow();
654	<	} catch (IndexOutOfBoundsException success) {}
648	>	CopyOnWriteArrayList c = populatedArray(5);
649	>	List[] lists = { c, c.subList(1, c.size() - 1) };
650	>	for (List list : lists) {
651	>	try {
652	>	list.addAll(list.size() + 1, new LinkedList());
653	>	shouldThrow();
654	>	} catch (IndexOutOfBoundsException success) {}
655	>	}
656		}
657
658		/**
659		* listIterator throws an IndexOutOfBoundsException on a negative index
660		*/
661		public void testListIterator1_IndexOutOfBoundsException() {
662	<	try {
663	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
664	<	c.listIterator(-1);
665	<	shouldThrow();
666	<	} catch (IndexOutOfBoundsException success) {}
662	>	CopyOnWriteArrayList c = populatedArray(5);
663	>	List[] lists = { c, c.subList(1, c.size() - 1) };
664	>	for (List list : lists) {
665	>	try {
666	>	list.listIterator(-1);
667	>	shouldThrow();
668	>	} catch (IndexOutOfBoundsException success) {}
669	>	}
670		}
671
672		/**
673		* listIterator throws an IndexOutOfBoundsException on a too high index
674		*/
675		public void testListIterator2_IndexOutOfBoundsException() {
676	<	try {
677	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
678	<	c.add("adasd");
679	<	c.add("asdasdas");
680	<	c.listIterator(100);
681	<	shouldThrow();
682	<	} catch (IndexOutOfBoundsException success) {}
676	>	CopyOnWriteArrayList c = populatedArray(5);
677	>	List[] lists = { c, c.subList(1, c.size() - 1) };
678	>	for (List list : lists) {
679	>	try {
680	>	list.listIterator(list.size() + 1);
681	>	shouldThrow();
682	>	} catch (IndexOutOfBoundsException success) {}
683	>	}
684		}
685
686		/**
687		* subList throws an IndexOutOfBoundsException on a negative index
688		*/
689		public void testSubList1_IndexOutOfBoundsException() {
690	<	try {
691	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
692	<	c.subList(-1,100);
693	<	shouldThrow();
694	<	} catch (IndexOutOfBoundsException success) {}
690	>	CopyOnWriteArrayList c = populatedArray(5);
691	>	List[] lists = { c, c.subList(1, c.size() - 1) };
692	>	for (List list : lists) {
693	>	try {
694	>	list.subList(-1, list.size());
695	>	shouldThrow();
696	>	} catch (IndexOutOfBoundsException success) {}
697	>	}
698		}
699
700		/**
701		* subList throws an IndexOutOfBoundsException on a too high index
702		*/
703		public void testSubList2_IndexOutOfBoundsException() {
704	<	try {
705	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
706	<	c.add("asdasd");
707	<	c.subList(1,100);
708	<	shouldThrow();
709	<	} catch (IndexOutOfBoundsException success) {}
704	>	CopyOnWriteArrayList c = populatedArray(5);
705	>	List[] lists = { c, c.subList(1, c.size() - 1) };
706	>	for (List list : lists) {
707	>	try {
708	>	list.subList(0, list.size() + 1);
709	>	shouldThrow();
710	>	} catch (IndexOutOfBoundsException success) {}
711	>	}
712		}
713
714		/**
#	Line 585 | Line 716 | public class CopyOnWriteArrayListTest ex
716		* is lower then the first
717		*/
718		public void testSubList3_IndexOutOfBoundsException() {
719	<	try {
720	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
721	<	c.subList(3,1);
722	<	shouldThrow();
723	<	} catch (IndexOutOfBoundsException success) {}
719	>	CopyOnWriteArrayList c = populatedArray(5);
720	>	List[] lists = { c, c.subList(1, c.size() - 1) };
721	>	for (List list : lists) {
722	>	try {
723	>	list.subList(list.size() - 1, 1);
724	>	shouldThrow();
725	>	} catch (IndexOutOfBoundsException success) {}
726	>	}
727		}
728
729		/**
730		* a deserialized serialized list is equal
731		*/
732		public void testSerialization() throws Exception {
733	<	CopyOnWriteArrayList q = populatedArray(SIZE);
733	>	List x = populatedArray(SIZE);
734	>	List y = serialClone(x);
735
736	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
737	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
738	<	out.writeObject(q);
739	<	out.close();
740	<
741	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
742	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
743	<	CopyOnWriteArrayList r = (CopyOnWriteArrayList)in.readObject();
744	<	assertEquals(q.size(), r.size());
745	<	assertTrue(q.equals(r));
746	<	assertTrue(r.equals(q));
736	>	assertNotSame(x, y);
737	>	assertEquals(x.size(), y.size());
738	>	assertEquals(x.toString(), y.toString());
739	>	assertTrue(Arrays.equals(x.toArray(), y.toArray()));
740	>	assertEquals(x, y);
741	>	assertEquals(y, x);
742	>	while (!x.isEmpty()) {
743	>	assertFalse(y.isEmpty());
744	>	assertEquals(x.remove(0), y.remove(0));
745	>	}
746	>	assertTrue(y.isEmpty());
747		}
748
749		}

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