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

Comparing jsr166/src/test/tck/LinkedListTest.java (file contents):
Revision 1.4 by dl, Sat Sep 20 18:20:08 2003 UTC vs.
Revision 1.24 by jsr166, Fri Nov 5 00:17:22 2010 UTC

#	Line 1 | Line 1
1		/*
2	<	* Written by members of JCP JSR-166 Expert Group and released to the
3	<	* public domain. Use, modify, and redistribute this code in any way
4	<	* without acknowledgement. Other contributors include Andrew Wright,
5	<	* Jeffrey Hayes, Pat Fischer, Mike Judd.
2	>	* Written by Doug Lea with assistance from members of JCP JSR-166
3	>	* Expert Group and released to the public domain, as explained at
4	>	* http://creativecommons.org/licenses/publicdomain
5	>	* Other contributors include Andrew Wright, Jeffrey Hayes,
6	>	* Pat Fisher, Mike Judd.
7		*/
8
9		import junit.framework.*;
#	Line 11 | Line 12 | import java.util.concurrent.*;
12
13		public class LinkedListTest extends JSR166TestCase {
14		public static void main(String[] args) {
15	<	junit.textui.TestRunner.run (suite());
15	>	junit.textui.TestRunner.run(suite());
16		}
17
18		public static Test suite() {
19	<	return new TestSuite(LinkedListTest.class);
19	>	return new TestSuite(LinkedListTest.class);
20		}
21
22		/**
23		* Create a queue of given size containing consecutive
24		* Integers 0 ... n.
25		*/
26	<	private LinkedList populatedQueue(int n) {
27	<	LinkedList q = new LinkedList();
26	>	private LinkedList<Integer> populatedQueue(int n) {
27	>	LinkedList<Integer> q = new LinkedList<Integer>();
28		assertTrue(q.isEmpty());
29	<	for(int i = 0; i < n; ++i)
30	<	assertTrue(q.offer(new Integer(i)));
29	>	for (int i = 0; i < n; ++i)
30	>	assertTrue(q.offer(new Integer(i)));
31		assertFalse(q.isEmpty());
32	<	assertEquals(n, q.size());
32	>	assertEquals(n, q.size());
33		return q;
34		}
35	<
35	>
36		/**
37	<	*
37	>	* new queue is empty
38		*/
39		public void testConstructor1() {
40		assertEquals(0, new LinkedList().size());
41		}
42
43		/**
44	<	*
44	>	* Initializing from null Collection throws NPE
45		*/
46		public void testConstructor3() {
47		try {
48		LinkedList q = new LinkedList((Collection)null);
49		shouldThrow();
50	<	}
50	<	catch (NullPointerException success) {}
50	>	} catch (NullPointerException success) {}
51		}
52
53		/**
54	<	*
54	>	* Queue contains all elements of collection used to initialize
55		*/
56		public void testConstructor6() {
57	<	try {
58	<	Integer[] ints = new Integer[SIZE];
59	<	for (int i = 0; i < SIZE; ++i)
60	<	ints[i] = new Integer(i);
61	<	LinkedList q = new LinkedList(Arrays.asList(ints));
62	<	for (int i = 0; i < SIZE; ++i)
63	<	assertEquals(ints[i], q.poll());
64	<	}
65	<	finally {}
57	>	Integer[] ints = new Integer[SIZE];
58	>	for (int i = 0; i < SIZE; ++i)
59	>	ints[i] = i;
60	>	LinkedList q = new LinkedList(Arrays.asList(ints));
61	>	for (int i = 0; i < SIZE; ++i)
62	>	assertEquals(ints[i], q.poll());
63		}
64
65		/**
66	<	*
66	>	* isEmpty is true before add, false after
67		*/
68		public void testEmpty() {
69		LinkedList q = new LinkedList();
#	Line 80 | Line 77 | public class LinkedListTest extends JSR1
77		}
78
79		/**
80	<	*
80	>	* size changes when elements added and removed
81		*/
82		public void testSize() {
83		LinkedList q = populatedQueue(SIZE);
#	Line 95 | Line 92 | public class LinkedListTest extends JSR1
92		}
93
94		/**
95	<	*
95	>	* offer(null) succeeds
96		*/
97		public void testOfferNull() {
98	<	try {
99	<	LinkedList q = new LinkedList();
103	<	q.offer(null);
104	<	} catch (NullPointerException ie) {
105	<	unexpectedException();
106	<	}
98	>	LinkedList q = new LinkedList();
99	>	q.offer(null);
100		}
101
102		/**
103	<	*
103	>	* Offer succeeds
104		*/
105		public void testOffer() {
106		LinkedList q = new LinkedList();
#	Line 116 | Line 109 | public class LinkedListTest extends JSR1
109		}
110
111		/**
112	<	*
112	>	* add succeeds
113		*/
114		public void testAdd() {
115		LinkedList q = new LinkedList();
#	Line 127 | Line 120 | public class LinkedListTest extends JSR1
120		}
121
122		/**
123	<	*
123	>	* addAll(null) throws NPE
124		*/
125		public void testAddAll1() {
126		try {
127		LinkedList q = new LinkedList();
128		q.addAll(null);
129		shouldThrow();
130	<	}
138	<	catch (NullPointerException success) {}
130	>	} catch (NullPointerException success) {}
131		}
132
133		/**
134	<	*
134	>	* Queue contains all elements, in traversal order, of successful addAll
135		*/
136		public void testAddAll5() {
137	+	Integer[] empty = new Integer[0];
138	+	Integer[] ints = new Integer[SIZE];
139	+	for (int i = 0; i < SIZE; ++i)
140	+	ints[i] = i;
141	+	LinkedList q = new LinkedList();
142	+	assertFalse(q.addAll(Arrays.asList(empty)));
143	+	assertTrue(q.addAll(Arrays.asList(ints)));
144	+	for (int i = 0; i < SIZE; ++i)
145	+	assertEquals(ints[i], q.poll());
146	+	}
147	+
148	+	/**
149	+	* addAll with too large an index throws IOOBE
150	+	*/
151	+	public void testAddAll2_IndexOutOfBoundsException() {
152	+	LinkedList l = new LinkedList();
153	+	l.add(new Object());
154	+	LinkedList m = new LinkedList();
155	+	m.add(new Object());
156		try {
157	<	Integer[] empty = new Integer[0];
158	<	Integer[] ints = new Integer[SIZE];
159	<	for (int i = 0; i < SIZE; ++i)
160	<	ints[i] = new Integer(i);
161	<	LinkedList q = new LinkedList();
162	<	assertFalse(q.addAll(Arrays.asList(empty)));
163	<	assertTrue(q.addAll(Arrays.asList(ints)));
164	<	for (int i = 0; i < SIZE; ++i)
165	<	assertEquals(ints[i], q.poll());
166	<	}
167	<	finally {}
157	>	l.addAll(4,m);
158	>	shouldThrow();
159	>	} catch (IndexOutOfBoundsException success) {}
160	>	}
161	>
162	>	/**
163	>	* addAll with negative index throws IOOBE
164	>	*/
165	>	public void testAddAll4_BadIndex() {
166	>	LinkedList l = new LinkedList();
167	>	l.add(new Object());
168	>	LinkedList m = new LinkedList();
169	>	m.add(new Object());
170	>	try {
171	>	l.addAll(-1,m);
172	>	shouldThrow();
173	>	} catch (IndexOutOfBoundsException success) {}
174		}
175
176		/**
177	<	*
177	>	* poll succeeds unless empty
178		*/
179		public void testPoll() {
180		LinkedList q = populatedQueue(SIZE);
181		for (int i = 0; i < SIZE; ++i) {
182	<	assertEquals(i, ((Integer)q.poll()).intValue());
182	>	assertEquals(i, q.poll());
183		}
184	<	assertNull(q.poll());
184	>	assertNull(q.poll());
185		}
186
187		/**
188	<	*
188	>	* peek returns next element, or null if empty
189		*/
190		public void testPeek() {
191		LinkedList q = populatedQueue(SIZE);
192		for (int i = 0; i < SIZE; ++i) {
193	<	assertEquals(i, ((Integer)q.peek()).intValue());
194	<	q.poll();
193	>	assertEquals(i, q.peek());
194	>	assertEquals(i, q.poll());
195		assertTrue(q.peek() == null ||
196	<	i != ((Integer)q.peek()).intValue());
196	>	!q.peek().equals(i));
197		}
198	<	assertNull(q.peek());
198	>	assertNull(q.peek());
199		}
200
201		/**
202	<	*
202	>	* element returns next element, or throws NSEE if empty
203		*/
204		public void testElement() {
205		LinkedList q = populatedQueue(SIZE);
206		for (int i = 0; i < SIZE; ++i) {
207	<	assertEquals(i, ((Integer)q.element()).intValue());
208	<	q.poll();
207	>	assertEquals(i, q.element());
208	>	assertEquals(i, q.poll());
209		}
210		try {
211		q.element();
212		shouldThrow();
213	<	}
197	<	catch (NoSuchElementException success) {}
213	>	} catch (NoSuchElementException success) {}
214		}
215
216		/**
217	<	*
217	>	* remove removes next element, or throws NSEE if empty
218		*/
219		public void testRemove() {
220		LinkedList q = populatedQueue(SIZE);
221		for (int i = 0; i < SIZE; ++i) {
222	<	assertEquals(i, ((Integer)q.remove()).intValue());
222	>	assertEquals(i, q.remove());
223		}
224		try {
225		q.remove();
226		shouldThrow();
227	<	} catch (NoSuchElementException success){
212	<	}
227	>	} catch (NoSuchElementException success) {}
228		}
229
230		/**
231	<	*
231	>	* remove(x) removes x and returns true if present
232		*/
233		public void testRemoveElement() {
234		LinkedList q = populatedQueue(SIZE);
#	Line 226 | Line 241 | public class LinkedListTest extends JSR1
241		}
242		assertTrue(q.isEmpty());
243		}
244	<
244	>
245		/**
246	<	*
246	>	* contains(x) reports true when elements added but not yet removed
247		*/
248		public void testContains() {
249		LinkedList q = populatedQueue(SIZE);
#	Line 240 | Line 255 | public class LinkedListTest extends JSR1
255		}
256
257		/**
258	<	*
258	>	* clear removes all elements
259		*/
260		public void testClear() {
261		LinkedList q = populatedQueue(SIZE);
262		q.clear();
263		assertTrue(q.isEmpty());
264		assertEquals(0, q.size());
265	<	q.add(new Integer(1));
265	>	assertTrue(q.add(new Integer(1)));
266		assertFalse(q.isEmpty());
267		q.clear();
268		assertTrue(q.isEmpty());
269		}
270
271		/**
272	<	*
272	>	* containsAll(c) is true when c contains a subset of elements
273		*/
274		public void testContainsAll() {
275		LinkedList q = populatedQueue(SIZE);
#	Line 262 | Line 277 | public class LinkedListTest extends JSR1
277		for (int i = 0; i < SIZE; ++i) {
278		assertTrue(q.containsAll(p));
279		assertFalse(p.containsAll(q));
280	<	p.add(new Integer(i));
280	>	assertTrue(p.add(new Integer(i)));
281		}
282		assertTrue(p.containsAll(q));
283		}
284
285		/**
286	<	*
286	>	* retainAll(c) retains only those elements of c and reports true if changed
287		*/
288		public void testRetainAll() {
289		LinkedList q = populatedQueue(SIZE);
#	Line 287 | Line 302 | public class LinkedListTest extends JSR1
302		}
303
304		/**
305	<	*
305	>	* removeAll(c) removes only those elements of c and reports true if changed
306		*/
307		public void testRemoveAll() {
308		for (int i = 1; i < SIZE; ++i) {
#	Line 303 | Line 318 | public class LinkedListTest extends JSR1
318		}
319
320		/**
321	<	*
321	>	* toArray contains all elements in FIFO order
322		*/
323		public void testToArray() {
324		LinkedList q = populatedQueue(SIZE);
325	<	Object[] o = q.toArray();
326	<	Arrays.sort(o);
327	<	for(int i = 0; i < o.length; i++)
313	<	assertEquals(o[i], q.poll());
325	>	Object[] o = q.toArray();
326	>	for (int i = 0; i < o.length; i++)
327	>	assertSame(o[i], q.poll());
328		}
329
330		/**
331	<	*
331	>	* toArray(a) contains all elements in FIFO order
332		*/
333		public void testToArray2() {
334	<	LinkedList q = populatedQueue(SIZE);
335	<	Integer[] ints = new Integer[SIZE];
336	<	ints = (Integer[])q.toArray(ints);
337	<	Arrays.sort(ints);
338	<	for(int i = 0; i < ints.length; i++)
339	<	assertEquals(ints[i], q.poll());
334	>	LinkedList<Integer> q = populatedQueue(SIZE);
335	>	Integer[] ints = new Integer[SIZE];
336	>	Integer[] array = q.toArray(ints);
337	>	assertSame(ints, array);
338	>	for (int i = 0; i < ints.length; i++)
339	>	assertSame(ints[i], q.poll());
340		}
341	<
341	>
342		/**
343	<	*
343	>	* toArray(null) throws NullPointerException
344	>	*/
345	>	public void testToArray_NullArg() {
346	>	LinkedList l = new LinkedList();
347	>	l.add(new Object());
348	>	try {
349	>	l.toArray(null);
350	>	shouldThrow();
351	>	} catch (NullPointerException success) {}
352	>	}
353	>
354	>	/**
355	>	* toArray(incompatible array type) throws ArrayStoreException
356	>	*/
357	>	public void testToArray1_BadArg() {
358	>	LinkedList l = new LinkedList();
359	>	l.add(new Integer(5));
360	>	try {
361	>	l.toArray(new String[10]);
362	>	shouldThrow();
363	>	} catch (ArrayStoreException success) {}
364	>	}
365	>
366	>	/**
367	>	* iterator iterates through all elements
368		*/
369		public void testIterator() {
370		LinkedList q = populatedQueue(SIZE);
371		int i = 0;
372	<	Iterator it = q.iterator();
373	<	while(it.hasNext()) {
372	>	Iterator it = q.iterator();
373	>	while (it.hasNext()) {
374		assertTrue(q.contains(it.next()));
375		++i;
376		}
#	Line 340 | Line 378 | public class LinkedListTest extends JSR1
378		}
379
380		/**
381	<	*
381	>	* iterator ordering is FIFO
382		*/
383		public void testIteratorOrdering() {
346	–
384		final LinkedList q = new LinkedList();
348	–
385		q.add(new Integer(1));
386		q.add(new Integer(2));
387		q.add(new Integer(3));
352	–
388		int k = 0;
389		for (Iterator it = q.iterator(); it.hasNext();) {
390	<	int i = ((Integer)(it.next())).intValue();
356	<	assertEquals(++k, i);
390	>	assertEquals(++k, it.next());
391		}
392
393		assertEquals(3, k);
394		}
395
396		/**
397	<	*
397	>	* iterator.remove removes current element
398		*/
399	<	public void testIteratorRemove () {
399	>	public void testIteratorRemove() {
400		final LinkedList q = new LinkedList();
367	–
401		q.add(new Integer(1));
402		q.add(new Integer(2));
403		q.add(new Integer(3));
371	–
404		Iterator it = q.iterator();
405	<	it.next();
405	>	assertEquals(it.next(), 1);
406		it.remove();
375	–
407		it = q.iterator();
408	<	assertEquals(it.next(), new Integer(2));
409	<	assertEquals(it.next(), new Integer(3));
408	>	assertEquals(it.next(), 2);
409	>	assertEquals(it.next(), 3);
410		assertFalse(it.hasNext());
411		}
412
382	–
413		/**
414	<	*
414	>	* Descending iterator iterates through all elements
415		*/
416	<	public void testToString() {
416	>	public void testDescendingIterator() {
417		LinkedList q = populatedQueue(SIZE);
418	<	String s = q.toString();
419	<	for (int i = 0; i < SIZE; ++i) {
420	<	assertTrue(s.indexOf(String.valueOf(i)) >= 0);
418	>	int i = 0;
419	>	Iterator it = q.descendingIterator();
420	>	while (it.hasNext()) {
421	>	assertTrue(q.contains(it.next()));
422	>	++i;
423		}
424	<	}
425	<
426	<	/**
427	<	*
428	<	*/
429	<	public void testAddFirst() {
398	<	LinkedList q = populatedQueue(3);
399	<	q.addFirst(new Integer(4));
400	<	assertEquals(new Integer(4),q.get(0));
401	<	}
402	<
403	<	/**
404	<	*
405	<	*/
406	<	public void testAddLast() {
407	<	LinkedList q = populatedQueue(3);
408	<	q.addLast(new Integer(3));
409	<	assertEquals(new Integer(3),q.get(3));
410	<	}
411	<
412	<	/**
413	<	*
414	<	*/
415	<	public void testGetFirst() {
416	<	LinkedList q = populatedQueue(3);
417	<	assertEquals(new Integer(0),q.getFirst());
418	<	}
419	<
420	<	/**
421	<	*
422	<	*/
423	<	public void testGetLast() {
424	<	LinkedList q = populatedQueue(3);
425	<	assertEquals(new Integer(2),q.getLast());
426	<	}
427	<
428	<	/**
429	<	*
430	<	*/
431	<	public void testIndexOf() {
432	<	LinkedList q = populatedQueue(3);
433	<	assertEquals(0,q.indexOf(new Integer(0)));
434	<	assertEquals(1,q.indexOf(new Integer(1)));
435	<	assertEquals(2,q.indexOf(new Integer(2)));
436	<	assertEquals(-1, q.indexOf("not there"));
424	>	assertEquals(i, SIZE);
425	>	assertFalse(it.hasNext());
426	>	try {
427	>	it.next();
428	>	shouldThrow();
429	>	} catch (NoSuchElementException success) {}
430		}
431
432		/**
433	<	*
433	>	* Descending iterator ordering is reverse FIFO
434		*/
435	<	public void testLastIndexOf() {
436	<	LinkedList q = populatedQueue(3);
435	>	public void testDescendingIteratorOrdering() {
436	>	final LinkedList q = new LinkedList();
437	>	q.add(new Integer(3));
438		q.add(new Integer(2));
439	<	assertEquals(3,q.lastIndexOf(new Integer(2)));
440	<	assertEquals(-1, q.lastIndexOf("not there"));
441	<	}
442	<
443	<	/**
450	<	*
451	<	*/
452	<	public void testSet() {
453	<	LinkedList q = populatedQueue(3);
454	<	q.set(0,(new Integer(1)));
455	<	assertFalse(q.contains(new Integer(0)));
456	<	assertEquals(new Integer(1), q.get(0));
457	<	}
458	<
439	>	q.add(new Integer(1));
440	>	int k = 0;
441	>	for (Iterator it = q.descendingIterator(); it.hasNext();) {
442	>	assertEquals(++k, it.next());
443	>	}
444
445	<	/**
461	<	*
462	<	*/
463	<	public void testGetFirst_NoSuchElementException() {
464	<	try {
465	<	LinkedList l = new LinkedList();
466	<	l.getFirst();
467	<	shouldThrow();
468	<	}
469	<	catch(NoSuchElementException success) {}
470	<	}
471	<
472	<	/**
473	<	*
474	<	*/
475	<	public void testRemoveFirst() {
476	<	try {
477	<	LinkedList l = new LinkedList();
478	<	l.removeFirst();
479	<	shouldThrow();
480	<	}
481	<	catch(NoSuchElementException success) {}
482	<	}
483	<
484	<	/**
485	<	*
486	<	*/
487	<	public void testRemoveLast() {
488	<	try {
489	<	LinkedList l = new LinkedList();
490	<	l.removeLast();
491	<	shouldThrow();
492	<	}
493	<	catch(NoSuchElementException success) {}
445	>	assertEquals(3, k);
446		}
447	<
447	>
448		/**
449	<	*
449	>	* descendingIterator.remove removes current element
450		*/
451	<	public void testGetLast_NoSuchElementException() {
452	<	try {
453	<	LinkedList l = new LinkedList();
454	<	l.getLast();
455	<	shouldThrow();
456	<	}
457	<	catch(NoSuchElementException success) {}
451	>	public void testDescendingIteratorRemove() {
452	>	final LinkedList q = new LinkedList();
453	>	q.add(three);
454	>	q.add(two);
455	>	q.add(one);
456	>	Iterator it = q.descendingIterator();
457	>	it.next();
458	>	it.remove();
459	>	it = q.descendingIterator();
460	>	assertSame(it.next(), two);
461	>	assertSame(it.next(), three);
462	>	assertFalse(it.hasNext());
463		}
464
465
466		/**
467	<	*
511	<	*/
512	<	public void testAddAll_NullPointerException() {
513	<	try {
514	<	LinkedList l = new LinkedList();
515	<	l.addAll((Collection)null);
516	<	shouldThrow();
517	<	}
518	<	catch(NullPointerException success){}
519	<	}
520	<
521	<
522	<	/**
523	<	*
467	>	* toString contains toStrings of elements
468		*/
469	<	public void testAddAll1_OutOfBounds() {
470	<	try {
471	<	LinkedList l = new LinkedList();
472	<	l.addAll(4,new LinkedList());
473	<	shouldThrow();
474	<	}
531	<	catch(IndexOutOfBoundsException  success) {}
469	>	public void testToString() {
470	>	LinkedList q = populatedQueue(SIZE);
471	>	String s = q.toString();
472	>	for (int i = 0; i < SIZE; ++i) {
473	>	assertTrue(s.indexOf(String.valueOf(i)) >= 0);
474	>	}
475		}
476	<
534	<
476	>
477		/**
478	<	*
478	>	* peek returns element inserted with addFirst
479		*/
480	<	public void testAddAll2_IndexOutOfBoundsException() {
481	<	try {
482	<	LinkedList l = new LinkedList();
483	<	l.add(new Object());
542	<	LinkedList m = new LinkedList();
543	<	m.add(new Object());
544	<	l.addAll(4,m);
545	<	shouldThrow();
546	<	} catch(IndexOutOfBoundsException  success) {}
480	>	public void testAddFirst() {
481	>	LinkedList q = populatedQueue(3);
482	>	q.addFirst(four);
483	>	assertSame(four, q.peek());
484		}
485
486		/**
487	<	*
487	>	* peekFirst returns element inserted with push
488		*/
489	<	public void testAddAll4_BadIndex() {
490	<	try {
491	<	LinkedList l = new LinkedList();
492	<	l.add(new Object());
556	<	LinkedList m = new LinkedList();
557	<	m.add(new Object());
558	<	l.addAll(-1,m);
559	<	shouldThrow();
560	<	} catch(IndexOutOfBoundsException  success){}
489	>	public void testPush() {
490	>	LinkedList q = populatedQueue(3);
491	>	q.push(four);
492	>	assertSame(four, q.peekFirst());
493		}
494
495		/**
496	<	*
496	>	* pop removes next element, or throws NSEE if empty
497		*/
498	<	public void testget1() {
499	<	try {
500	<	LinkedList l = new LinkedList();
501	<	l.add(new Object());
502	<	l.get(-1);
503	<	shouldThrow();
504	<	} catch(IndexOutOfBoundsException  success) {}
498	>	public void testPop() {
499	>	LinkedList q = populatedQueue(SIZE);
500	>	for (int i = 0; i < SIZE; ++i) {
501	>	assertEquals(i, q.pop());
502	>	}
503	>	try {
504	>	q.pop();
505	>	shouldThrow();
506	>	} catch (NoSuchElementException success) {}
507		}
508
509		/**
510	<	*
510	>	* OfferFirst succeeds
511		*/
512	<	public void testget2() {
513	<	try {
514	<	LinkedList l = new LinkedList();
515	<	l.add(new Object());
582	<	l.get(5);
583	<	shouldThrow();
584	<	} catch(IndexOutOfBoundsException  success){}
512	>	public void testOfferFirst() {
513	>	LinkedList q = new LinkedList();
514	>	assertTrue(q.offerFirst(new Integer(0)));
515	>	assertTrue(q.offerFirst(new Integer(1)));
516		}
517
518		/**
519	<	*
519	>	* OfferLast succeeds
520		*/
521	<	public void testset1() {
522	<	try {
523	<	LinkedList l = new LinkedList();
524	<	l.add(new Object());
594	<	l.set(-1,new Object());
595	<	shouldThrow();
596	<	} catch(IndexOutOfBoundsException  success){}
521	>	public void testOfferLast() {
522	>	LinkedList q = new LinkedList();
523	>	assertTrue(q.offerLast(new Integer(0)));
524	>	assertTrue(q.offerLast(new Integer(1)));
525		}
526
527		/**
528	<	*
528	>	* pollLast succeeds unless empty
529		*/
530	<	public void testset2() {
531	<	try {
532	<	LinkedList l = new LinkedList();
533	<	l.add(new Object());
534	<	l.set(5,new Object());
535	<	shouldThrow();
608	<	} catch(IndexOutOfBoundsException  success){}
530	>	public void testPollLast() {
531	>	LinkedList q = populatedQueue(SIZE);
532	>	for (int i = SIZE-1; i >= 0; --i) {
533	>	assertEquals(i, q.pollLast());
534	>	}
535	>	assertNull(q.pollLast());
536		}
537
538		/**
539	<	*
539	>	* peekFirst returns next element, or null if empty
540		*/
541	<	public void testadd1() {
542	<	try {
543	<	LinkedList l = new LinkedList();
544	<	l.add(new Object());
545	<	l.add(-1,new Object());
546	<	shouldThrow();
547	<	} catch(IndexOutOfBoundsException  success){}
541	>	public void testPeekFirst() {
542	>	LinkedList q = populatedQueue(SIZE);
543	>	for (int i = 0; i < SIZE; ++i) {
544	>	assertEquals(i, q.peekFirst());
545	>	assertEquals(i, q.pollFirst());
546	>	assertTrue(q.peekFirst() == null ||
547	>	!q.peekFirst().equals(i));
548	>	}
549	>	assertNull(q.peekFirst());
550		}
551
623	–	public void add2() {
624	–	try {
625	–	LinkedList l = new LinkedList();
626	–	l.add(new Object());
627	–	l.add(5,new Object());
628	–	shouldThrow();
629	–	} catch(IndexOutOfBoundsException  success) {}
630	–	}
552
553		/**
554	<	*
634	<	*/
635	<	public void testremove() {
636	<	try {
637	<	LinkedList l = new LinkedList();
638	<	l.add(new Object());
639	<	l.remove(-1);
640	<	shouldThrow();
641	<	} catch(IndexOutOfBoundsException  success){}
642	<	}
643	<
644	<	/**
645	<	*
554	>	* peekLast returns next element, or null if empty
555		*/
556	<	public void testremove1() {
557	<	try {
558	<	LinkedList l = new LinkedList();
559	<	l.add(new Object());
560	<	l.remove(5);
561	<	shouldThrow();
562	<	} catch(IndexOutOfBoundsException  success){}
556	>	public void testPeekLast() {
557	>	LinkedList q = populatedQueue(SIZE);
558	>	for (int i = SIZE-1; i >= 0; --i) {
559	>	assertEquals(i, q.peekLast());
560	>	assertEquals(i, q.pollLast());
561	>	assertTrue(q.peekLast() == null ||
562	>	!q.peekLast().equals(i));
563	>	}
564	>	assertNull(q.peekLast());
565		}
566
567	<
568	<	/**
569	<	*
570	<	*/
571	<	public void testremove2() {
567	>	public void testFirstElement() {
568	>	LinkedList q = populatedQueue(SIZE);
569	>	for (int i = 0; i < SIZE; ++i) {
570	>	assertEquals(i, q.getFirst());
571	>	assertEquals(i, q.pollFirst());
572	>	}
573		try {
574	<	LinkedList l = new LinkedList();
663	<	l.remove();
574	>	q.getFirst();
575		shouldThrow();
576	<	} catch(NoSuchElementException e){}
576	>	} catch (NoSuchElementException success) {}
577		}
578
579		/**
580	<	*
580	>	* getLast returns next element, or throws NSEE if empty
581		*/
582	<	public void testlistIt1() {
583	<	try {
584	<	LinkedList l = new LinkedList();
585	<	l.add(new Object());
586	<	l.listIterator(5);
587	<	shouldThrow();
588	<	} catch(IndexOutOfBoundsException  success){}
589	<	}
590	<
591	<	/**
592	<	*
682	<	*/
683	<	public void testlistIt2() {
684	<	try {
685	<	LinkedList l = new LinkedList();
686	<	l.add(new Object());
687	<	l.listIterator(-1);
688	<	shouldThrow();
689	<	} catch(IndexOutOfBoundsException  success){}
690	<	}
691	<
692	<	/**
693	<	*
694	<	*/
695	<	public void testlistIt3() {
696	<	try {
697	<	LinkedList l = new LinkedList();
698	<	l.add(new Object());
699	<	ListIterator a = l.listIterator(0);
700	<	l.removeFirst();
701	<	a.next();
702	<	shouldThrow();
703	<	} catch(ConcurrentModificationException success){}
582	>	public void testLastElement() {
583	>	LinkedList q = populatedQueue(SIZE);
584	>	for (int i = SIZE-1; i >= 0; --i) {
585	>	assertEquals(i, q.getLast());
586	>	assertEquals(i, q.pollLast());
587	>	}
588	>	try {
589	>	q.getLast();
590	>	shouldThrow();
591	>	} catch (NoSuchElementException success) {}
592	>	assertNull(q.peekLast());
593		}
594
595		/**
596	<	*
596	>	* removeFirstOccurrence(x) removes x and returns true if present
597		*/
598	<	public void testToArray_BadArg() {
599	<	try {
600	<	LinkedList l = new LinkedList();
601	<	l.add(new Object());
602	<	Object o[] = l.toArray(null);
603	<	shouldThrow();
604	<	} catch(NullPointerException success){}
598	>	public void testRemoveFirstOccurrence() {
599	>	LinkedList q = populatedQueue(SIZE);
600	>	for (int i = 1; i < SIZE; i+=2) {
601	>	assertTrue(q.removeFirstOccurrence(new Integer(i)));
602	>	}
603	>	for (int i = 0; i < SIZE; i+=2) {
604	>	assertTrue(q.removeFirstOccurrence(new Integer(i)));
605	>	assertFalse(q.removeFirstOccurrence(new Integer(i+1)));
606	>	}
607	>	assertTrue(q.isEmpty());
608		}
609
610		/**
611	<	*
611	>	* removeLastOccurrence(x) removes x and returns true if present
612		*/
613	<	public void testToArray1_BadArg() {
614	<	try {
615	<	LinkedList l = new LinkedList();
616	<	l.add(new Integer(5));
617	<	Object o[] = l.toArray(new String[10] );
618	<	shouldThrow();
619	<	} catch(ArrayStoreException  success){}
613	>	public void testRemoveLastOccurrence() {
614	>	LinkedList q = populatedQueue(SIZE);
615	>	for (int i = 1; i < SIZE; i+=2) {
616	>	assertTrue(q.removeLastOccurrence(new Integer(i)));
617	>	}
618	>	for (int i = 0; i < SIZE; i+=2) {
619	>	assertTrue(q.removeLastOccurrence(new Integer(i)));
620	>	assertFalse(q.removeLastOccurrence(new Integer(i+1)));
621	>	}
622	>	assertTrue(q.isEmpty());
623		}
624
625		}

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