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Comparing jsr166/src/test/tck/LinkedListTest.java (file contents):
Revision 1.14 by jsr166, Sat Nov 21 02:39:41 2009 UTC vs.
Revision 1.47 by jsr166, Tue Apr 3 05:49:43 2018 UTC

#	Line 1 | Line 1
1		/*
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
4	>	* http://creativecommons.org/publicdomain/zero/1.0/
5		* Other contributors include Andrew Wright, Jeffrey Hayes,
6		* Pat Fisher, Mike Judd.
7		*/
8
9	<	import junit.framework.*;
10	<	import java.util.*;
11	<	import java.util.concurrent.*;
9	>	import java.util.Arrays;
10	>	import java.util.Collection;
11	>	import java.util.Iterator;
12	>	import java.util.LinkedList;
13	>	import java.util.List;
14	>	import java.util.NoSuchElementException;
15	>	import java.util.concurrent.ThreadLocalRandom;
16	>
17	>	import junit.framework.Test;
18
19		public class LinkedListTest extends JSR166TestCase {
20		public static void main(String[] args) {
21	<	junit.textui.TestRunner.run (suite());
21	>	main(suite(), args);
22		}
23
24		public static Test suite() {
25	<	return new TestSuite(LinkedListTest.class);
25	>	class Implementation implements CollectionImplementation {
26	>	public Class<?> klazz() { return LinkedList.class; }
27	>	public List emptyCollection() { return new LinkedList(); }
28	>	public Object makeElement(int i) { return i; }
29	>	public boolean isConcurrent() { return false; }
30	>	public boolean permitsNulls() { return true; }
31	>	}
32	>	class SubListImplementation extends Implementation {
33	>	public List emptyCollection() {
34	>	List list = super.emptyCollection();
35	>	ThreadLocalRandom rnd = ThreadLocalRandom.current();
36	>	if (rnd.nextBoolean())
37	>	list.add(makeElement(rnd.nextInt()));
38	>	int i = rnd.nextInt(list.size() + 1);
39	>	return list.subList(i, i);
40	>	}
41	>	}
42	>	return newTestSuite(
43	>	LinkedListTest.class,
44	>	CollectionTest.testSuite(new Implementation()),
45	>	CollectionTest.testSuite(new SubListImplementation()));
46		}
47
48		/**
49	<	* Create a queue of given size containing consecutive
50	<	* Integers 0 ... n.
49	>	* Returns a new queue of given size containing consecutive
50	>	* Integers 0 ... n - 1.
51		*/
52	<	private LinkedList populatedQueue(int n) {
53	<	LinkedList q = new LinkedList();
52	>	private static LinkedList<Integer> populatedQueue(int n) {
53	>	LinkedList<Integer> q = new LinkedList<>();
54		assertTrue(q.isEmpty());
55		for (int i = 0; i < n; ++i)
56		assertTrue(q.offer(new Integer(i)));
57		assertFalse(q.isEmpty());
58		assertEquals(n, q.size());
59	+	assertEquals((Integer) 0, q.peekFirst());
60	+	assertEquals((Integer) (n - 1), q.peekLast());
61		return q;
62		}
63
#	Line 45 | Line 73 | public class LinkedListTest extends JSR1
73		*/
74		public void testConstructor3() {
75		try {
76	<	LinkedList q = new LinkedList((Collection)null);
76	>	new LinkedList((Collection)null);
77		shouldThrow();
78		} catch (NullPointerException success) {}
79		}
#	Line 56 | Line 84 | public class LinkedListTest extends JSR1
84		public void testConstructor6() {
85		Integer[] ints = new Integer[SIZE];
86		for (int i = 0; i < SIZE; ++i)
87	<	ints[i] = new Integer(i);
87	>	ints[i] = i;
88		LinkedList q = new LinkedList(Arrays.asList(ints));
89		for (int i = 0; i < SIZE; ++i)
90		assertEquals(ints[i], q.poll());
#	Line 82 | Line 110 | public class LinkedListTest extends JSR1
110		public void testSize() {
111		LinkedList q = populatedQueue(SIZE);
112		for (int i = 0; i < SIZE; ++i) {
113	<	assertEquals(SIZE-i, q.size());
113	>	assertEquals(SIZE - i, q.size());
114		q.remove();
115		}
116		for (int i = 0; i < SIZE; ++i) {
#	Line 97 | Line 125 | public class LinkedListTest extends JSR1
125		public void testOfferNull() {
126		LinkedList q = new LinkedList();
127		q.offer(null);
128	+	assertNull(q.get(0));
129	+	assertTrue(q.contains(null));
130		}
131
132		/**
#	Line 123 | Line 153 | public class LinkedListTest extends JSR1
153		* addAll(null) throws NPE
154		*/
155		public void testAddAll1() {
156	+	LinkedList q = new LinkedList();
157		try {
127	–	LinkedList q = new LinkedList();
158		q.addAll(null);
159		shouldThrow();
160		} catch (NullPointerException success) {}
#	Line 137 | Line 167 | public class LinkedListTest extends JSR1
167		Integer[] empty = new Integer[0];
168		Integer[] ints = new Integer[SIZE];
169		for (int i = 0; i < SIZE; ++i)
170	<	ints[i] = new Integer(i);
170	>	ints[i] = i;
171		LinkedList q = new LinkedList();
172		assertFalse(q.addAll(Arrays.asList(empty)));
173		assertTrue(q.addAll(Arrays.asList(ints)));
#	Line 156 | Line 186 | public class LinkedListTest extends JSR1
186		try {
187		l.addAll(4,m);
188		shouldThrow();
189	<	} catch (IndexOutOfBoundsException  success) {}
189	>	} catch (IndexOutOfBoundsException success) {}
190		}
191
192		/**
#	Line 170 | Line 200 | public class LinkedListTest extends JSR1
200		try {
201		l.addAll(-1,m);
202		shouldThrow();
203	<	} catch (IndexOutOfBoundsException  success) {}
203	>	} catch (IndexOutOfBoundsException success) {}
204		}
205
206		/**
207	<	*  poll succeeds unless empty
207	>	* poll succeeds unless empty
208		*/
209		public void testPoll() {
210		LinkedList q = populatedQueue(SIZE);
211		for (int i = 0; i < SIZE; ++i) {
212	<	assertEquals(i, ((Integer)q.poll()).intValue());
212	>	assertEquals(i, q.poll());
213		}
214		assertNull(q.poll());
215		}
216
217		/**
218	<	*  peek returns next element, or null if empty
218	>	* peek returns next element, or null if empty
219		*/
220		public void testPeek() {
221		LinkedList q = populatedQueue(SIZE);
222		for (int i = 0; i < SIZE; ++i) {
223	<	assertEquals(i, ((Integer)q.peek()).intValue());
224	<	q.poll();
223	>	assertEquals(i, q.peek());
224	>	assertEquals(i, q.poll());
225		assertTrue(q.peek() == null ||
226	<	i != ((Integer)q.peek()).intValue());
226	>	!q.peek().equals(i));
227		}
228		assertNull(q.peek());
229		}
#	Line 204 | Line 234 | public class LinkedListTest extends JSR1
234		public void testElement() {
235		LinkedList q = populatedQueue(SIZE);
236		for (int i = 0; i < SIZE; ++i) {
237	<	assertEquals(i, ((Integer)q.element()).intValue());
238	<	q.poll();
237	>	assertEquals(i, q.element());
238	>	assertEquals(i, q.poll());
239		}
240		try {
241		q.element();
#	Line 214 | Line 244 | public class LinkedListTest extends JSR1
244		}
245
246		/**
247	<	*  remove removes next element, or throws NSEE if empty
247	>	* remove removes next element, or throws NSEE if empty
248		*/
249		public void testRemove() {
250		LinkedList q = populatedQueue(SIZE);
251		for (int i = 0; i < SIZE; ++i) {
252	<	assertEquals(i, ((Integer)q.remove()).intValue());
252	>	assertEquals(i, q.remove());
253		}
254		try {
255		q.remove();
#	Line 232 | Line 262 | public class LinkedListTest extends JSR1
262		*/
263		public void testRemoveElement() {
264		LinkedList q = populatedQueue(SIZE);
265	<	for (int i = 1; i < SIZE; i+=2) {
266	<	assertTrue(q.remove(new Integer(i)));
267	<	}
268	<	for (int i = 0; i < SIZE; i+=2) {
269	<	assertTrue(q.remove(new Integer(i)));
270	<	assertFalse(q.remove(new Integer(i+1)));
265	>	for (int i = 1; i < SIZE; i += 2) {
266	>	assertTrue(q.contains(i));
267	>	assertTrue(q.remove((Integer)i));
268	>	assertFalse(q.contains(i));
269	>	assertTrue(q.contains(i - 1));
270	>	}
271	>	for (int i = 0; i < SIZE; i += 2) {
272	>	assertTrue(q.contains(i));
273	>	assertTrue(q.remove((Integer)i));
274	>	assertFalse(q.contains(i));
275	>	assertFalse(q.remove((Integer)(i + 1)));
276	>	assertFalse(q.contains(i + 1));
277		}
278		assertTrue(q.isEmpty());
279		}
#	Line 262 | Line 298 | public class LinkedListTest extends JSR1
298		q.clear();
299		assertTrue(q.isEmpty());
300		assertEquals(0, q.size());
301	<	q.add(new Integer(1));
301	>	assertTrue(q.add(new Integer(1)));
302		assertFalse(q.isEmpty());
303		q.clear();
304		assertTrue(q.isEmpty());
#	Line 277 | Line 313 | public class LinkedListTest extends JSR1
313		for (int i = 0; i < SIZE; ++i) {
314		assertTrue(q.containsAll(p));
315		assertFalse(p.containsAll(q));
316	<	p.add(new Integer(i));
316	>	assertTrue(p.add(new Integer(i)));
317		}
318		assertTrue(p.containsAll(q));
319		}
#	Line 296 | Line 332 | public class LinkedListTest extends JSR1
332		assertTrue(changed);
333
334		assertTrue(q.containsAll(p));
335	<	assertEquals(SIZE-i, q.size());
335	>	assertEquals(SIZE - i, q.size());
336		p.remove();
337		}
338		}
#	Line 309 | Line 345 | public class LinkedListTest extends JSR1
345		LinkedList q = populatedQueue(SIZE);
346		LinkedList p = populatedQueue(i);
347		assertTrue(q.removeAll(p));
348	<	assertEquals(SIZE-i, q.size());
348	>	assertEquals(SIZE - i, q.size());
349		for (int j = 0; j < i; ++j) {
350	<	Integer I = (Integer)(p.remove());
351	<	assertFalse(q.contains(I));
350	>	Integer x = (Integer)(p.remove());
351	>	assertFalse(q.contains(x));
352		}
353		}
354		}
355
356		/**
357	<	*  toArray contains all elements
357	>	* toArray contains all elements in FIFO order
358		*/
359		public void testToArray() {
360		LinkedList q = populatedQueue(SIZE);
361		Object[] o = q.toArray();
326	–	Arrays.sort(o);
362		for (int i = 0; i < o.length; i++)
363	<	assertEquals(o[i], q.poll());
363	>	assertSame(o[i], q.poll());
364		}
365
366		/**
367	<	*  toArray(a) contains all elements
367	>	* toArray(a) contains all elements in FIFO order
368		*/
369		public void testToArray2() {
370	<	LinkedList q = populatedQueue(SIZE);
370	>	LinkedList<Integer> q = populatedQueue(SIZE);
371		Integer[] ints = new Integer[SIZE];
372	<	ints = (Integer[])q.toArray(ints);
373	<	Arrays.sort(ints);
372	>	Integer[] array = q.toArray(ints);
373	>	assertSame(ints, array);
374		for (int i = 0; i < ints.length; i++)
375	<	assertEquals(ints[i], q.poll());
375	>	assertSame(ints[i], q.poll());
376		}
377
378		/**
379	<	* toArray(null) throws NPE
379	>	* toArray(null) throws NullPointerException
380		*/
381	<	public void testToArray_BadArg() {
381	>	public void testToArray_NullArg() {
382	>	LinkedList l = new LinkedList();
383	>	l.add(new Object());
384		try {
385	<	LinkedList l = new LinkedList();
349	<	l.add(new Object());
350	<	Object o[] = l.toArray(null);
385	>	l.toArray(null);
386		shouldThrow();
387		} catch (NullPointerException success) {}
388		}
389
390		/**
391	<	* toArray with incompatable aray type throws CCE
391	>	* toArray(incompatible array type) throws ArrayStoreException
392		*/
393		public void testToArray1_BadArg() {
394	+	LinkedList l = new LinkedList();
395	+	l.add(new Integer(5));
396		try {
397	<	LinkedList l = new LinkedList();
361	<	l.add(new Integer(5));
362	<	Object o[] = l.toArray(new String[10] );
397	>	l.toArray(new String[10]);
398		shouldThrow();
399		} catch (ArrayStoreException success) {}
400		}
401
402		/**
403	<	*  iterator iterates through all elements
403	>	* iterator iterates through all elements
404		*/
405		public void testIterator() {
406		LinkedList q = populatedQueue(SIZE);
372	–	int i = 0;
407		Iterator it = q.iterator();
408	<	while (it.hasNext()) {
408	>	int i;
409	>	for (i = 0; it.hasNext(); i++)
410		assertTrue(q.contains(it.next()));
376	–	++i;
377	–	}
411		assertEquals(i, SIZE);
412	+	assertIteratorExhausted(it);
413	+	}
414	+
415	+	/**
416	+	* iterator of empty collection has no elements
417	+	*/
418	+	public void testEmptyIterator() {
419	+	assertIteratorExhausted(new LinkedList().iterator());
420		}
421
422		/**
423	<	*  iterator ordering is FIFO
423	>	* iterator ordering is FIFO
424		*/
425		public void testIteratorOrdering() {
426		final LinkedList q = new LinkedList();
#	Line 388 | Line 429 | public class LinkedListTest extends JSR1
429		q.add(new Integer(3));
430		int k = 0;
431		for (Iterator it = q.iterator(); it.hasNext();) {
432	<	int i = ((Integer)(it.next())).intValue();
392	<	assertEquals(++k, i);
432	>	assertEquals(++k, it.next());
433		}
434
435		assertEquals(3, k);
#	Line 398 | Line 438 | public class LinkedListTest extends JSR1
438		/**
439		* iterator.remove removes current element
440		*/
441	<	public void testIteratorRemove () {
441	>	public void testIteratorRemove() {
442		final LinkedList q = new LinkedList();
443		q.add(new Integer(1));
444		q.add(new Integer(2));
445		q.add(new Integer(3));
446		Iterator it = q.iterator();
447	<	it.next();
447	>	assertEquals(1, it.next());
448		it.remove();
449		it = q.iterator();
450	<	assertEquals(it.next(), new Integer(2));
451	<	assertEquals(it.next(), new Integer(3));
450	>	assertEquals(2, it.next());
451	>	assertEquals(3, it.next());
452		assertFalse(it.hasNext());
453		}
454
455		/**
456	<	*  Descending iterator iterates through all elements
456	>	* Descending iterator iterates through all elements
457		*/
458		public void testDescendingIterator() {
459		LinkedList q = populatedQueue(SIZE);
#	Line 432 | Line 472 | public class LinkedListTest extends JSR1
472		}
473
474		/**
475	<	*  Descending iterator ordering is reverse FIFO
475	>	* Descending iterator ordering is reverse FIFO
476		*/
477		public void testDescendingIteratorOrdering() {
478		final LinkedList q = new LinkedList();
#	Line 441 | Line 481 | public class LinkedListTest extends JSR1
481		q.add(new Integer(1));
482		int k = 0;
483		for (Iterator it = q.descendingIterator(); it.hasNext();) {
484	<	int i = ((Integer)(it.next())).intValue();
445	<	assertEquals(++k, i);
484	>	assertEquals(++k, it.next());
485		}
486
487		assertEquals(3, k);
#	Line 451 | Line 490 | public class LinkedListTest extends JSR1
490		/**
491		* descendingIterator.remove removes current element
492		*/
493	<	public void testDescendingIteratorRemove () {
493	>	public void testDescendingIteratorRemove() {
494		final LinkedList q = new LinkedList();
495	<	q.add(new Integer(3));
496	<	q.add(new Integer(2));
497	<	q.add(new Integer(1));
495	>	q.add(three);
496	>	q.add(two);
497	>	q.add(one);
498		Iterator it = q.descendingIterator();
499		it.next();
500		it.remove();
501		it = q.descendingIterator();
502	<	assertEquals(it.next(), new Integer(2));
503	<	assertEquals(it.next(), new Integer(3));
502	>	assertSame(it.next(), two);
503	>	assertSame(it.next(), three);
504		assertFalse(it.hasNext());
505		}
506
468	–
507		/**
508		* toString contains toStrings of elements
509		*/
#	Line 473 | Line 511 | public class LinkedListTest extends JSR1
511		LinkedList q = populatedQueue(SIZE);
512		String s = q.toString();
513		for (int i = 0; i < SIZE; ++i) {
514	<	assertTrue(s.indexOf(String.valueOf(i)) >= 0);
514	>	assertTrue(s.contains(String.valueOf(i)));
515		}
516		}
517
#	Line 483 | Line 521 | public class LinkedListTest extends JSR1
521		public void testAddFirst() {
522		LinkedList q = populatedQueue(3);
523		q.addFirst(four);
524	<	assertEquals(four,q.peek());
524	>	assertSame(four, q.peek());
525		}
526
527		/**
#	Line 491 | Line 529 | public class LinkedListTest extends JSR1
529		*/
530		public void testPush() {
531		LinkedList q = populatedQueue(3);
494	–	q.pollLast();
532		q.push(four);
533	<	assertEquals(four,q.peekFirst());
533	>	assertSame(four, q.peekFirst());
534		}
535
536		/**
537	<	*  pop removes next element, or throws NSEE if empty
537	>	* pop removes next element, or throws NSEE if empty
538		*/
539		public void testPop() {
540		LinkedList q = populatedQueue(SIZE);
541		for (int i = 0; i < SIZE; ++i) {
542	<	assertEquals(i, ((Integer)q.pop()).intValue());
542	>	assertEquals(i, q.pop());
543		}
544		try {
545		q.pop();
#	Line 529 | Line 566 | public class LinkedListTest extends JSR1
566		}
567
568		/**
569	<	*  pollLast succeeds unless empty
569	>	* pollLast succeeds unless empty
570		*/
571		public void testPollLast() {
572		LinkedList q = populatedQueue(SIZE);
573	<	for (int i = SIZE-1; i >= 0; --i) {
574	<	assertEquals(i, ((Integer)q.pollLast()).intValue());
573	>	for (int i = SIZE - 1; i >= 0; --i) {
574	>	assertEquals(i, q.pollLast());
575		}
576		assertNull(q.pollLast());
577		}
578
579		/**
580	<	*  peekFirst returns next element, or null if empty
580	>	* peekFirst returns next element, or null if empty
581		*/
582		public void testPeekFirst() {
583		LinkedList q = populatedQueue(SIZE);
584		for (int i = 0; i < SIZE; ++i) {
585	<	assertEquals(i, ((Integer)q.peekFirst()).intValue());
586	<	q.pollFirst();
585	>	assertEquals(i, q.peekFirst());
586	>	assertEquals(i, q.pollFirst());
587		assertTrue(q.peekFirst() == null ||
588	<	i != ((Integer)q.peekFirst()).intValue());
588	>	!q.peekFirst().equals(i));
589		}
590		assertNull(q.peekFirst());
591		}
592
556	–
593		/**
594	<	*  peekLast returns next element, or null if empty
594	>	* peekLast returns next element, or null if empty
595		*/
596		public void testPeekLast() {
597		LinkedList q = populatedQueue(SIZE);
598	<	for (int i = SIZE-1; i >= 0; --i) {
599	<	assertEquals(i, ((Integer)q.peekLast()).intValue());
600	<	q.pollLast();
598	>	for (int i = SIZE - 1; i >= 0; --i) {
599	>	assertEquals(i, q.peekLast());
600	>	assertEquals(i, q.pollLast());
601		assertTrue(q.peekLast() == null ||
602	<	i != ((Integer)q.peekLast()).intValue());
602	>	!q.peekLast().equals(i));
603		}
604		assertNull(q.peekLast());
605		}
#	Line 571 | Line 607 | public class LinkedListTest extends JSR1
607		public void testFirstElement() {
608		LinkedList q = populatedQueue(SIZE);
609		for (int i = 0; i < SIZE; ++i) {
610	<	assertEquals(i, ((Integer)q.getFirst()).intValue());
611	<	q.pollFirst();
610	>	assertEquals(i, q.getFirst());
611	>	assertEquals(i, q.pollFirst());
612		}
613		try {
614		q.getFirst();
#	Line 581 | Line 617 | public class LinkedListTest extends JSR1
617		}
618
619		/**
620	<	*  getLast returns next element, or throws NSEE if empty
620	>	* getLast returns next element, or throws NSEE if empty
621		*/
622		public void testLastElement() {
623		LinkedList q = populatedQueue(SIZE);
624	<	for (int i = SIZE-1; i >= 0; --i) {
625	<	assertEquals(i, ((Integer)q.getLast()).intValue());
626	<	q.pollLast();
624	>	for (int i = SIZE - 1; i >= 0; --i) {
625	>	assertEquals(i, q.getLast());
626	>	assertEquals(i, q.pollLast());
627		}
628		try {
629		q.getLast();
#	Line 601 | Line 637 | public class LinkedListTest extends JSR1
637		*/
638		public void testRemoveFirstOccurrence() {
639		LinkedList q = populatedQueue(SIZE);
640	<	for (int i = 1; i < SIZE; i+=2) {
640	>	for (int i = 1; i < SIZE; i += 2) {
641		assertTrue(q.removeFirstOccurrence(new Integer(i)));
642		}
643	<	for (int i = 0; i < SIZE; i+=2) {
643	>	for (int i = 0; i < SIZE; i += 2) {
644		assertTrue(q.removeFirstOccurrence(new Integer(i)));
645	<	assertFalse(q.removeFirstOccurrence(new Integer(i+1)));
645	>	assertFalse(q.removeFirstOccurrence(new Integer(i + 1)));
646		}
647		assertTrue(q.isEmpty());
648		}
#	Line 616 | Line 652 | public class LinkedListTest extends JSR1
652		*/
653		public void testRemoveLastOccurrence() {
654		LinkedList q = populatedQueue(SIZE);
655	<	for (int i = 1; i < SIZE; i+=2) {
655	>	for (int i = 1; i < SIZE; i += 2) {
656		assertTrue(q.removeLastOccurrence(new Integer(i)));
657		}
658	<	for (int i = 0; i < SIZE; i+=2) {
658	>	for (int i = 0; i < SIZE; i += 2) {
659		assertTrue(q.removeLastOccurrence(new Integer(i)));
660	<	assertFalse(q.removeLastOccurrence(new Integer(i+1)));
660	>	assertFalse(q.removeLastOccurrence(new Integer(i + 1)));
661		}
662		assertTrue(q.isEmpty());
663		}

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