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Comparing jsr166/src/test/tck/CopyOnWriteArrayListTest.java (file contents):
Revision 1.7 by dl, Mon Dec 29 19:05:40 2003 UTC vs.
Revision 1.49 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
5	<	* Other contributors include Andrew Wright, Jeffrey Hayes,
6	<	* Pat Fisher, Mike Judd.
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.*;
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.List;
15	>	import java.util.ListIterator;
16	>	import java.util.NoSuchElementException;
17	>	import java.util.concurrent.CopyOnWriteArrayList;
18	>	import java.util.concurrent.ThreadLocalRandom;
19	>
20	>	import junit.framework.Test;
21	>
22	>	public class CopyOnWriteArrayListTest extends JSR166TestCase {
23
14	–	public class CopyOnWriteArrayListTest extends JSR166TestCase{
15	–
24		public static void main(String[] args) {
25	<	junit.textui.TestRunner.run (suite());
25	>	main(suite(), args);
26		}
27
28		public static Test suite() {
29	<	return new TestSuite(CopyOnWriteArrayListTest.class);
30	<	}
31	<
32	<	static CopyOnWriteArrayList populatedArray(int n){
33	<	CopyOnWriteArrayList a = new CopyOnWriteArrayList();
34	<	assertTrue(a.isEmpty());
35	<	for (int i = 0; i < n; ++i)
36	<	a.add(new Integer(i));
37	<	assertFalse(a.isEmpty());
38	<	assertEquals(n, a.size());
39	<	return a;
29	>	class Implementation implements CollectionImplementation {
30	>	public Class<?> klazz() { return CopyOnWriteArrayList.class; }
31	>	public List emptyCollection() { return new CopyOnWriteArrayList(); }
32	>	public Object makeElement(int i) { return i; }
33	>	public boolean isConcurrent() { return true; }
34	>	public boolean permitsNulls() { return true; }
35	>	}
36	>	class SubListImplementation extends Implementation {
37	>	public List emptyCollection() {
38	>	List list = super.emptyCollection();
39	>	ThreadLocalRandom rnd = ThreadLocalRandom.current();
40	>	if (rnd.nextBoolean())
41	>	list.add(makeElement(rnd.nextInt()));
42	>	int i = rnd.nextInt(list.size() + 1);
43	>	return list.subList(i, i);
44	>	}
45	>	}
46	>	return newTestSuite(
47	>	CopyOnWriteArrayListTest.class,
48	>	CollectionTest.testSuite(new Implementation()),
49	>	CollectionTest.testSuite(new SubListImplementation()));
50	>	}
51	>
52	>	static CopyOnWriteArrayList<Integer> populatedList(int n) {
53	>	CopyOnWriteArrayList<Integer> list = new CopyOnWriteArrayList<>();
54	>	assertTrue(list.isEmpty());
55	>	for (int i = 0; i < n; i++)
56	>	list.add(i);
57	>	assertEquals(n <= 0, list.isEmpty());
58	>	assertEquals(n, list.size());
59	>	return list;
60	>	}
61	>
62	>	static CopyOnWriteArrayList<Integer> populatedList(Integer[] elements) {
63	>	CopyOnWriteArrayList<Integer> list = new CopyOnWriteArrayList<>();
64	>	assertTrue(list.isEmpty());
65	>	for (Integer element : elements)
66	>	list.add(element);
67	>	assertFalse(list.isEmpty());
68	>	assertEquals(elements.length, list.size());
69	>	return list;
70		}
71
34	–
72		/**
73		* a new list is empty
74		*/
75		public void testConstructor() {
76	<	CopyOnWriteArrayList a = new CopyOnWriteArrayList();
77	<	assertTrue(a.isEmpty());
76	>	List list = new CopyOnWriteArrayList();
77	>	assertTrue(list.isEmpty());
78		}
79
80		/**
81		* new list contains all elements of initializing array
82		*/
83		public void testConstructor2() {
84	<	Integer[] ints = new Integer[SIZE];
85	<	for (int i = 0; i < SIZE-1; ++i)
86	<	ints[i] = new Integer(i);
87	<	CopyOnWriteArrayList a = new CopyOnWriteArrayList(ints);
88	<	for (int i = 0; i < SIZE; ++i)
89	<	assertEquals(ints[i], a.get(i));
84	>	Integer[] elts = new Integer[SIZE];
85	>	for (int i = 0; i < SIZE - 1; ++i)
86	>	elts[i] = i;
87	>	List list = new CopyOnWriteArrayList(elts);
88	>	for (int i = 0; i < SIZE; ++i)
89	>	assertEquals(elts[i], list.get(i));
90		}
91
92		/**
93		* new list contains all elements of initializing collection
94		*/
95		public void testConstructor3() {
96	<	Integer[] ints = new Integer[SIZE];
97	<	for (int i = 0; i < SIZE-1; ++i)
98	<	ints[i] = new Integer(i);
99	<	CopyOnWriteArrayList a = new CopyOnWriteArrayList(Arrays.asList(ints));
100	<	for (int i = 0; i < SIZE; ++i)
101	<	assertEquals(ints[i], a.get(i));
96	>	Integer[] elts = new Integer[SIZE];
97	>	for (int i = 0; i < SIZE - 1; ++i)
98	>	elts[i] = i;
99	>	List list = new CopyOnWriteArrayList(Arrays.asList(elts));
100	>	for (int i = 0; i < SIZE; ++i)
101	>	assertEquals(elts[i], list.get(i));
102		}
66	–
103
104		/**
105	<	*   addAll  adds each element from the given collection
105	>	* addAll adds each element from the given collection, including duplicates
106		*/
107		public void testAddAll() {
108	<	CopyOnWriteArrayList full = populatedArray(3);
109	<	Vector v = new Vector();
110	<	v.add(three);
111	<	v.add(four);
112	<	v.add(five);
77	<	full.addAll(v);
78	<	assertEquals(6, full.size());
108	>	List list = populatedList(3);
109	>	assertTrue(list.addAll(Arrays.asList(three, four, five)));
110	>	assertEquals(6, list.size());
111	>	assertTrue(list.addAll(Arrays.asList(three, four, five)));
112	>	assertEquals(9, list.size());
113		}
114
115		/**
116	<	*   addAllAbsent adds each element from the given collection that did not
117	<	*  already exist in the List
116	>	* addAllAbsent adds each element from the given collection that did not
117	>	* already exist in the List
118		*/
119		public void testAddAllAbsent() {
120	<	CopyOnWriteArrayList full = populatedArray(3);
121	<	Vector v = new Vector();
122	<	v.add(three);
123	<	v.add(four);
124	<	v.add(one); // will not add this element
125	<	full.addAllAbsent(v);
92	<	assertEquals(5, full.size());
120	>	CopyOnWriteArrayList list = populatedList(3);
121	>	// "one" is duplicate and will not be added
122	>	assertEquals(2, list.addAllAbsent(Arrays.asList(three, four, one)));
123	>	assertEquals(5, list.size());
124	>	assertEquals(0, list.addAllAbsent(Arrays.asList(three, four, one)));
125	>	assertEquals(5, list.size());
126		}
127
128		/**
129	<	*   addIfAbsent will not add the element if it already exists in the list
129	>	* addIfAbsent will not add the element if it already exists in the list
130		*/
131		public void testAddIfAbsent() {
132	<	CopyOnWriteArrayList full = populatedArray(SIZE);
133	<	full.addIfAbsent(one);
134	<	assertEquals(SIZE, full.size());
132	>	CopyOnWriteArrayList list = populatedList(SIZE);
133	>	list.addIfAbsent(one);
134	>	assertEquals(SIZE, list.size());
135		}
136
137		/**
138	<	*   addIfAbsent adds the element when it does not exist in the list
138	>	* addIfAbsent adds the element when it does not exist in the list
139		*/
140		public void testAddIfAbsent2() {
141	<	CopyOnWriteArrayList full = populatedArray(SIZE);
142	<	full.addIfAbsent(three);
143	<	assertTrue(full.contains(three));
141	>	CopyOnWriteArrayList list = populatedList(SIZE);
142	>	list.addIfAbsent(three);
143	>	assertTrue(list.contains(three));
144		}
145
146		/**
147	<	*   clear removes all elements from the list
147	>	* clear removes all elements from the list
148		*/
149		public void testClear() {
150	<	CopyOnWriteArrayList full = populatedArray(SIZE);
151	<	full.clear();
152	<	assertEquals(0, full.size());
150	>	List list = populatedList(SIZE);
151	>	list.clear();
152	>	assertEquals(0, list.size());
153		}
154
122	–
155		/**
156	<	*  Cloned list is equal
156	>	* Cloned list is equal
157		*/
158		public void testClone() {
159	<	CopyOnWriteArrayList l1 = populatedArray(SIZE);
160	<	CopyOnWriteArrayList l2 = (CopyOnWriteArrayList)(l1.clone());
159	>	CopyOnWriteArrayList l1 = populatedList(SIZE);
160	>	CopyOnWriteArrayList l2 = (CopyOnWriteArrayList)(l1.clone());
161		assertEquals(l1, l2);
162	<	l1.clear();
162	>	l1.clear();
163		assertFalse(l1.equals(l2));
164		}
165
166		/**
167	<	*   contains is true for added elements
167	>	* contains is true for added elements
168		*/
169		public void testContains() {
170	<	CopyOnWriteArrayList full = populatedArray(3);
171	<	assertTrue(full.contains(one));
172	<	assertFalse(full.contains(five));
170	>	List list = populatedList(3);
171	>	assertTrue(list.contains(one));
172	>	assertFalse(list.contains(five));
173		}
174
175		/**
176		* adding at an index places it in the indicated index
177		*/
178		public void testAddIndex() {
179	<	CopyOnWriteArrayList full = populatedArray(3);
180	<	full.add(0, m1);
181	<	assertEquals(4, full.size());
182	<	assertEquals(m1, full.get(0));
183	<	assertEquals(zero, full.get(1));
184	<
185	<	full.add(2, m2);
186	<	assertEquals(5, full.size());
187	<	assertEquals(m2, full.get(2));
188	<	assertEquals(two, full.get(4));
179	>	List list = populatedList(3);
180	>	list.add(0, m1);
181	>	assertEquals(4, list.size());
182	>	assertEquals(m1, list.get(0));
183	>	assertEquals(zero, list.get(1));
184	>
185	>	list.add(2, m2);
186	>	assertEquals(5, list.size());
187	>	assertEquals(m2, list.get(2));
188	>	assertEquals(two, list.get(4));
189		}
190
191		/**
192		* lists with same elements are equal and have same hashCode
193		*/
194		public void testEquals() {
195	<	CopyOnWriteArrayList a = populatedArray(3);
196	<	CopyOnWriteArrayList b = populatedArray(3);
195	>	List a = populatedList(3);
196	>	List b = populatedList(3);
197		assertTrue(a.equals(b));
198		assertTrue(b.equals(a));
199	+	assertTrue(a.containsAll(b));
200	+	assertTrue(b.containsAll(a));
201		assertEquals(a.hashCode(), b.hashCode());
202		a.add(m1);
203		assertFalse(a.equals(b));
204		assertFalse(b.equals(a));
205	+	assertTrue(a.containsAll(b));
206	+	assertFalse(b.containsAll(a));
207		b.add(m1);
208		assertTrue(a.equals(b));
209		assertTrue(b.equals(a));
210	+	assertTrue(a.containsAll(b));
211	+	assertTrue(b.containsAll(a));
212		assertEquals(a.hashCode(), b.hashCode());
213	+
214	+	assertFalse(a.equals(null));
215		}
216
177	–
217		/**
218	<	*   containsAll returns true for collection with subset of elements
218	>	* containsAll returns true for collections with subset of elements
219		*/
220		public void testContainsAll() {
221	<	CopyOnWriteArrayList full = populatedArray(3);
222	<	Vector v = new Vector();
223	<	v.add(one);
224	<	v.add(two);
225	<	assertTrue(full.containsAll(v));
226	<	v.add(six);
227	<	assertFalse(full.containsAll(v));
221	>	List list = populatedList(3);
222	>	assertTrue(list.containsAll(Arrays.asList()));
223	>	assertTrue(list.containsAll(Arrays.asList(one)));
224	>	assertTrue(list.containsAll(Arrays.asList(one, two)));
225	>	assertFalse(list.containsAll(Arrays.asList(one, two, six)));
226	>	assertFalse(list.containsAll(Arrays.asList(six)));
227	>
228	>	try {
229	>	list.containsAll(null);
230	>	shouldThrow();
231	>	} catch (NullPointerException success) {}
232		}
233
234		/**
235	<	*   get returns the  value at the given index
235	>	* get returns the value at the given index
236		*/
237		public void testGet() {
238	<	CopyOnWriteArrayList full = populatedArray(3);
239	<	assertEquals(0, ((Integer)full.get(0)).intValue());
238	>	List list = populatedList(3);
239	>	assertEquals(0, list.get(0));
240		}
241
242		/**
243	<	*   indexOf gives the index for the given object
243	>	* indexOf(Object) returns the index of the first occurrence of the
244	>	* specified element in this list, or -1 if this list does not
245	>	* contain the element
246		*/
247		public void testIndexOf() {
248	<	CopyOnWriteArrayList full = populatedArray(3);
249	<	assertEquals(1, full.indexOf(one));
250	<	assertEquals(-1, full.indexOf("puppies"));
248	>	List list = populatedList(3);
249	>	assertEquals(-1, list.indexOf(-42));
250	>	int size = list.size();
251	>	for (int i = 0; i < size; i++) {
252	>	assertEquals(i, list.indexOf(i));
253	>	assertEquals(i, list.subList(0, size).indexOf(i));
254	>	assertEquals(i, list.subList(0, i + 1).indexOf(i));
255	>	assertEquals(-1, list.subList(0, i).indexOf(i));
256	>	assertEquals(0, list.subList(i, size).indexOf(i));
257	>	assertEquals(-1, list.subList(i + 1, size).indexOf(i));
258	>	}
259	>
260	>	list.add(1);
261	>	assertEquals(1, list.indexOf(1));
262	>	assertEquals(1, list.subList(0, size + 1).indexOf(1));
263	>	assertEquals(0, list.subList(1, size + 1).indexOf(1));
264	>	assertEquals(size - 2, list.subList(2, size + 1).indexOf(1));
265	>	assertEquals(0, list.subList(size, size + 1).indexOf(1));
266	>	assertEquals(-1, list.subList(size + 1, size + 1).indexOf(1));
267		}
268
269		/**
270	<	*   indexOf gives the index based on the given index
271	<	*  at which to start searching
270	>	* indexOf(E, int) returns the index of the first occurrence of the
271	>	* specified element in this list, searching forwards from index,
272	>	* or returns -1 if the element is not found
273		*/
274		public void testIndexOf2() {
275	<	CopyOnWriteArrayList full = populatedArray(3);
276	<	assertEquals(1, full.indexOf(one, 0));
277	<	assertEquals(-1, full.indexOf(one, 2));
275	>	CopyOnWriteArrayList list = populatedList(3);
276	>	int size = list.size();
277	>	assertEquals(-1, list.indexOf(-42, 0));
278	>
279	>	// we might expect IOOBE, but spec says otherwise
280	>	assertEquals(-1, list.indexOf(0, size));
281	>	assertEquals(-1, list.indexOf(0, Integer.MAX_VALUE));
282	>
283	>	assertThrows(
284	>	IndexOutOfBoundsException.class,
285	>	() -> list.indexOf(0, -1),
286	>	() -> list.indexOf(0, Integer.MIN_VALUE));
287	>
288	>	for (int i = 0; i < size; i++) {
289	>	assertEquals(i, list.indexOf(i, 0));
290	>	assertEquals(i, list.indexOf(i, i));
291	>	assertEquals(-1, list.indexOf(i, i + 1));
292	>	}
293	>
294	>	list.add(1);
295	>	assertEquals(1, list.indexOf(1, 0));
296	>	assertEquals(1, list.indexOf(1, 1));
297	>	assertEquals(size, list.indexOf(1, 2));
298	>	assertEquals(size, list.indexOf(1, size));
299		}
300
301		/**
302	<	*   isEmpty returns true when empty, else false
302	>	* isEmpty returns true when empty, else false
303		*/
304		public void testIsEmpty() {
305	<	CopyOnWriteArrayList empty = new CopyOnWriteArrayList();
306	<	CopyOnWriteArrayList full = populatedArray(SIZE);
307	<	assertTrue(empty.isEmpty());
308	<	assertFalse(full.isEmpty());
305	>	List empty = new CopyOnWriteArrayList();
306	>	assertTrue(empty.isEmpty());
307	>	assertTrue(empty.subList(0, 0).isEmpty());
308	>
309	>	List full = populatedList(SIZE);
310	>	assertFalse(full.isEmpty());
311	>	assertTrue(full.subList(0, 0).isEmpty());
312	>	assertTrue(full.subList(SIZE, SIZE).isEmpty());
313		}
314
315		/**
316	<	*   iterator() returns an iterator containing the elements of the list
316	>	* iterator() returns an iterator containing the elements of the
317	>	* list in insertion order
318		*/
319		public void testIterator() {
320	<	CopyOnWriteArrayList full = populatedArray(SIZE);
321	<	Iterator i = full.iterator();
322	<	int j;
323	<	for(j = 0; i.hasNext(); j++)
324	<	assertEquals(j, ((Integer)i.next()).intValue());
325	<	assertEquals(SIZE, j);
320	>	Collection empty = new CopyOnWriteArrayList();
321	>	assertFalse(empty.iterator().hasNext());
322	>	try {
323	>	empty.iterator().next();
324	>	shouldThrow();
325	>	} catch (NoSuchElementException success) {}
326	>
327	>	Integer[] elements = new Integer[SIZE];
328	>	for (int i = 0; i < SIZE; i++)
329	>	elements[i] = i;
330	>	shuffle(elements);
331	>	Collection<Integer> full = populatedList(elements);
332	>
333	>	Iterator it = full.iterator();
334	>	for (int j = 0; j < SIZE; j++) {
335	>	assertTrue(it.hasNext());
336	>	assertEquals(elements[j], it.next());
337	>	}
338	>	assertIteratorExhausted(it);
339	>	}
340	>
341	>	/**
342	>	* iterator of empty collection has no elements
343	>	*/
344	>	public void testEmptyIterator() {
345	>	Collection c = new CopyOnWriteArrayList();
346	>	assertIteratorExhausted(c.iterator());
347		}
348
349		/**
350		* iterator.remove throws UnsupportedOperationException
351		*/
352	<	public void testIteratorRemove () {
353	<	CopyOnWriteArrayList full = populatedArray(SIZE);
354	<	Iterator it = full.iterator();
352	>	public void testIteratorRemove() {
353	>	CopyOnWriteArrayList list = populatedList(SIZE);
354	>	Iterator it = list.iterator();
355		it.next();
356		try {
357		it.remove();
358		shouldThrow();
359	<	}
251	<	catch (UnsupportedOperationException success) {}
359	>	} catch (UnsupportedOperationException success) {}
360		}
361
362		/**
363		* toString contains toString of elements
364		*/
365		public void testToString() {
366	<	CopyOnWriteArrayList full = populatedArray(3);
367	<	String s = full.toString();
368	<	for (int i = 0; i < 3; ++i) {
369	<	assertTrue(s.indexOf(String.valueOf(i)) >= 0);
370	<	}
371	<	}
366	>	assertEquals("[]", new CopyOnWriteArrayList().toString());
367	>	List list = populatedList(3);
368	>	String s = list.toString();
369	>	for (int i = 0; i < 3; ++i)
370	>	assertTrue(s.contains(String.valueOf(i)));
371	>	assertEquals(new ArrayList(list).toString(),
372	>	list.toString());
373	>	}
374
375		/**
376	<	*   lastIndexOf returns the index for the given object
376	>	* lastIndexOf(Object) returns the index of the last occurrence of
377	>	* the specified element in this list, or -1 if this list does not
378	>	* contain the element
379		*/
380		public void testLastIndexOf1() {
381	<	CopyOnWriteArrayList full = populatedArray(3);
382	<	full.add(one);
383	<	full.add(three);
384	<	assertEquals(3, full.lastIndexOf(one));
385	<	assertEquals(-1, full.lastIndexOf(six));
381	>	List list = populatedList(3);
382	>	assertEquals(-1, list.lastIndexOf(-42));
383	>	int size = list.size();
384	>	for (int i = 0; i < size; i++) {
385	>	assertEquals(i, list.lastIndexOf(i));
386	>	assertEquals(i, list.subList(0, size).lastIndexOf(i));
387	>	assertEquals(i, list.subList(0, i + 1).lastIndexOf(i));
388	>	assertEquals(-1, list.subList(0, i).lastIndexOf(i));
389	>	assertEquals(0, list.subList(i, size).lastIndexOf(i));
390	>	assertEquals(-1, list.subList(i + 1, size).lastIndexOf(i));
391	>	}
392	>
393	>	list.add(1);
394	>	assertEquals(size, list.lastIndexOf(1));
395	>	assertEquals(size, list.subList(0, size + 1).lastIndexOf(1));
396	>	assertEquals(1, list.subList(0, size).lastIndexOf(1));
397	>	assertEquals(0, list.subList(1, 2).lastIndexOf(1));
398	>	assertEquals(-1, list.subList(0, 1).indexOf(1));
399		}
400
401		/**
402	<	*   lastIndexOf returns the index from the given starting point
403	<	*/
404	<	public void testlastIndexOf2() {
405	<	CopyOnWriteArrayList full = populatedArray(3);
406	<	full.add(one);
407	<	full.add(three);
408	<	assertEquals(3, full.lastIndexOf(one, 4));
409	<	assertEquals(-1, full.lastIndexOf(three, 3));
402	>	* lastIndexOf(E, int) returns the index of the last occurrence of the
403	>	* specified element in this list, searching backwards from index, or
404	>	* returns -1 if the element is not found
405	>	*/
406	>	public void testLastIndexOf2() {
407	>	CopyOnWriteArrayList list = populatedList(3);
408	>
409	>	// we might expect IOOBE, but spec says otherwise
410	>	assertEquals(-1, list.lastIndexOf(0, -1));
411	>
412	>	int size = list.size();
413	>	assertThrows(
414	>	IndexOutOfBoundsException.class,
415	>	() -> list.lastIndexOf(0, size),
416	>	() -> list.lastIndexOf(0, Integer.MAX_VALUE));
417	>
418	>	for (int i = 0; i < size; i++) {
419	>	assertEquals(i, list.lastIndexOf(i, i));
420	>	assertEquals(list.indexOf(i), list.lastIndexOf(i, i));
421	>	if (i > 0)
422	>	assertEquals(-1, list.lastIndexOf(i, i - 1));
423	>	}
424	>	list.add(one);
425	>	list.add(three);
426	>	assertEquals(1, list.lastIndexOf(one, 1));
427	>	assertEquals(1, list.lastIndexOf(one, 2));
428	>	assertEquals(3, list.lastIndexOf(one, 3));
429	>	assertEquals(3, list.lastIndexOf(one, 4));
430	>	assertEquals(-1, list.lastIndexOf(three, 3));
431		}
432
433		/**
434	<	*  listIterator traverses all elements
434	>	* listIterator traverses all elements
435		*/
436		public void testListIterator1() {
437	<	CopyOnWriteArrayList full = populatedArray(SIZE);
438	<	ListIterator i = full.listIterator();
439	<	int j;
440	<	for(j = 0; i.hasNext(); j++)
441	<	assertEquals(j, ((Integer)i.next()).intValue());
442	<	assertEquals(SIZE, j);
437	>	List list = populatedList(SIZE);
438	>	ListIterator i = list.listIterator();
439	>	int j;
440	>	for (j = 0; i.hasNext(); j++)
441	>	assertEquals(j, i.next());
442	>	assertEquals(SIZE, j);
443		}
444
445		/**
446	<	*  listIterator only returns those elements after the given index
446	>	* listIterator only returns those elements after the given index
447		*/
448		public void testListIterator2() {
449	<	CopyOnWriteArrayList full = populatedArray(3);
450	<	ListIterator i = full.listIterator(1);
451	<	int j;
452	<	for(j = 0; i.hasNext(); j++)
453	<	assertEquals(j+1, ((Integer)i.next()).intValue());
454	<	assertEquals(2, j);
449	>	List list = populatedList(3);
450	>	ListIterator i = list.listIterator(1);
451	>	int j;
452	>	for (j = 0; i.hasNext(); j++)
453	>	assertEquals(j + 1, i.next());
454	>	assertEquals(2, j);
455	>	}
456	>
457	>	/**
458	>	* remove(int) removes and returns the object at the given index
459	>	*/
460	>	public void testRemove_int() {
461	>	int SIZE = 3;
462	>	for (int i = 0; i < SIZE; i++) {
463	>	List list = populatedList(SIZE);
464	>	assertEquals(i, list.remove(i));
465	>	assertEquals(SIZE - 1, list.size());
466	>	assertFalse(list.contains(new Integer(i)));
467	>	}
468		}
469
470		/**
471	<	*   remove  removes and returns the object at the given index
471	>	* remove(Object) removes the object if found and returns true
472		*/
473	<	public void testRemove() {
474	<	CopyOnWriteArrayList full = populatedArray(3);
475	<	assertEquals(two, full.remove(2));
476	<	assertEquals(2, full.size());
473	>	public void testRemove_Object() {
474	>	int SIZE = 3;
475	>	for (int i = 0; i < SIZE; i++) {
476	>	List list = populatedList(SIZE);
477	>	assertFalse(list.remove(new Integer(-42)));
478	>	assertTrue(list.remove(new Integer(i)));
479	>	assertEquals(SIZE - 1, list.size());
480	>	assertFalse(list.contains(new Integer(i)));
481	>	}
482	>	CopyOnWriteArrayList x = new CopyOnWriteArrayList(Arrays.asList(4, 5, 6));
483	>	assertTrue(x.remove(new Integer(6)));
484	>	assertEquals(x, Arrays.asList(4, 5));
485	>	assertTrue(x.remove(new Integer(4)));
486	>	assertEquals(x, Arrays.asList(5));
487	>	assertTrue(x.remove(new Integer(5)));
488	>	assertEquals(x, Arrays.asList());
489	>	assertFalse(x.remove(new Integer(5)));
490		}
491
492		/**
493	<	*   removeAll  removes all elements from the given collection
493	>	* removeAll removes all elements from the given collection
494		*/
495		public void testRemoveAll() {
496	<	CopyOnWriteArrayList full = populatedArray(3);
497	<	Vector v = new Vector();
498	<	v.add(one);
499	<	v.add(two);
500	<	full.removeAll(v);
329	<	assertEquals(1, full.size());
496	>	List list = populatedList(3);
497	>	assertTrue(list.removeAll(Arrays.asList(one, two)));
498	>	assertEquals(1, list.size());
499	>	assertFalse(list.removeAll(Arrays.asList(one, two)));
500	>	assertEquals(1, list.size());
501		}
502
503		/**
504	<	*   set  changes the element at the given index
504	>	* set changes the element at the given index
505		*/
506		public void testSet() {
507	<	CopyOnWriteArrayList full = populatedArray(3);
508	<	assertEquals(two, full.set(2, four));
509	<	assertEquals(4, ((Integer)full.get(2)).intValue());
507	>	List list = populatedList(3);
508	>	assertEquals(2, list.set(2, four));
509	>	assertEquals(4, list.get(2));
510		}
511
512		/**
513	<	*   size returns the number of elements
513	>	* size returns the number of elements
514		*/
515		public void testSize() {
516	<	CopyOnWriteArrayList empty = new CopyOnWriteArrayList();
517	<	CopyOnWriteArrayList full = populatedArray(SIZE);
518	<	assertEquals(SIZE, full.size());
519	<	assertEquals(0, empty.size());
516	>	List empty = new CopyOnWriteArrayList();
517	>	assertEquals(0, empty.size());
518	>	assertEquals(0, empty.subList(0, 0).size());
519	>
520	>	List full = populatedList(SIZE);
521	>	assertEquals(SIZE, full.size());
522	>	assertEquals(0, full.subList(0, 0).size());
523	>	assertEquals(0, full.subList(SIZE, SIZE).size());
524		}
525
526		/**
527	<	*   toArray returns an Object array containing all elements from the list
527	>	* toArray() returns an Object array containing all elements from
528	>	* the list in insertion order
529		*/
530		public void testToArray() {
531	<	CopyOnWriteArrayList full = populatedArray(3);
532	<	Object[] o = full.toArray();
533	<	assertEquals(3, o.length);
534	<	assertEquals(0, ((Integer)o[0]).intValue());
535	<	assertEquals(1, ((Integer)o[1]).intValue());
536	<	assertEquals(2, ((Integer)o[2]).intValue());
531	>	Object[] a = new CopyOnWriteArrayList().toArray();
532	>	assertTrue(Arrays.equals(new Object[0], a));
533	>	assertSame(Object[].class, a.getClass());
534	>
535	>	Integer[] elements = new Integer[SIZE];
536	>	for (int i = 0; i < SIZE; i++)
537	>	elements[i] = i;
538	>	shuffle(elements);
539	>	Collection<Integer> full = populatedList(elements);
540	>
541	>	assertTrue(Arrays.equals(elements, full.toArray()));
542	>	assertSame(Object[].class, full.toArray().getClass());
543		}
544
545		/**
546	<	*   toArray returns an Integer array containing all elements from
547	<	*   the list
546	>	* toArray(Integer array) returns an Integer array containing all
547	>	* elements from the list in insertion order
548		*/
549		public void testToArray2() {
550	<	CopyOnWriteArrayList full = populatedArray(3);
551	<	Integer[] i = new Integer[3];
552	<	i = (Integer[])full.toArray(i);
553	<	assertEquals(3, i.length);
554	<	assertEquals(0, i[0].intValue());
373	<	assertEquals(1, i[1].intValue());
374	<	assertEquals(2, i[2].intValue());
375	<	}
550	>	Collection empty = new CopyOnWriteArrayList();
551	>	Integer[] a;
552	>
553	>	a = new Integer[0];
554	>	assertSame(a, empty.toArray(a));
555
556	+	a = new Integer[SIZE / 2];
557	+	Arrays.fill(a, 42);
558	+	assertSame(a, empty.toArray(a));
559	+	assertNull(a[0]);
560	+	for (int i = 1; i < a.length; i++)
561	+	assertEquals(42, (int) a[i]);
562	+
563	+	Integer[] elements = new Integer[SIZE];
564	+	for (int i = 0; i < SIZE; i++)
565	+	elements[i] = i;
566	+	shuffle(elements);
567	+	Collection<Integer> full = populatedList(elements);
568	+
569	+	Arrays.fill(a, 42);
570	+	assertTrue(Arrays.equals(elements, full.toArray(a)));
571	+	for (int i = 0; i < a.length; i++)
572	+	assertEquals(42, (int) a[i]);
573	+	assertSame(Integer[].class, full.toArray(a).getClass());
574	+
575	+	a = new Integer[SIZE];
576	+	Arrays.fill(a, 42);
577	+	assertSame(a, full.toArray(a));
578	+	assertTrue(Arrays.equals(elements, a));
579	+
580	+	a = new Integer[2 * SIZE];
581	+	Arrays.fill(a, 42);
582	+	assertSame(a, full.toArray(a));
583	+	assertTrue(Arrays.equals(elements, Arrays.copyOf(a, SIZE)));
584	+	assertNull(a[SIZE]);
585	+	for (int i = SIZE + 1; i < a.length; i++)
586	+	assertEquals(42, (int) a[i]);
587	+	}
588
589		/**
590		* sublists contains elements at indexes offset from their base
591		*/
592		public void testSubList() {
593	<	CopyOnWriteArrayList a = populatedArray(10);
593	>	List a = populatedList(10);
594		assertTrue(a.subList(1,1).isEmpty());
595	<	for(int j = 0; j < 9; ++j) {
596	<	for(int i = j ; i < 10; ++i) {
597	<	List b = a.subList(j,i);
598	<	for(int k = j; k < i; ++k) {
599	<	assertEquals(new Integer(k), b.get(k-j));
600	<	}
601	<	}
602	<	}
595	>	for (int j = 0; j < 9; ++j) {
596	>	for (int i = j ; i < 10; ++i) {
597	>	List b = a.subList(j,i);
598	>	for (int k = j; k < i; ++k) {
599	>	assertEquals(new Integer(k), b.get(k-j));
600	>	}
601	>	}
602	>	}
603
604	<	List s = a.subList(2, 5);
605	<	assertEquals(s.size(), 3);
604	>	List s = a.subList(2, 5);
605	>	assertEquals(3, s.size());
606		s.set(2, m1);
607		assertEquals(a.get(4), m1);
608	<	s.clear();
609	<	assertEquals(a.size(), 7);
608	>	s.clear();
609	>	assertEquals(7, a.size());
610	>
611	>	assertThrows(
612	>	IndexOutOfBoundsException.class,
613	>	() -> s.get(0),
614	>	() -> s.set(0, 42));
615		}
616
617		// Exception tests
618
619		/**
620	<	*   toArray throws an ArrayStoreException when the given array
621	<	*  can not store the objects inside the list
620	>	* toArray throws an ArrayStoreException when the given array
621	>	* can not store the objects inside the list
622		*/
623		public void testToArray_ArrayStoreException() {
624	<	try {
625	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
626	<	c.add("zfasdfsdf");
627	<	c.add("asdadasd");
628	<	c.toArray(new Long[5]);
629	<	shouldThrow();
630	<	} catch(ArrayStoreException e){}
631	<	}
632	<
633	<	/**
634	<	*   get throws an IndexOutOfBoundsException on a negative index
635	<	*/
636	<	public void testGet1_IndexOutOfBoundsException() {
637	<	try {
638	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
639	<	c.get(-1);
640	<	shouldThrow();
641	<	} catch(IndexOutOfBoundsException e){}
642	<	}
643	<
644	<	/**
645	<	*   get throws an IndexOutOfBoundsException on a too high index
646	<	*/
647	<	public void testGet2_IndexOutOfBoundsException() {
648	<	try {
649	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
650	<	c.add("asdasd");
651	<	c.add("asdad");
652	<	c.get(100);
653	<	shouldThrow();
654	<	} catch(IndexOutOfBoundsException e){}
655	<	}
656	<
657	<	/**
658	<	*   set throws an IndexOutOfBoundsException on a negative index
659	<	*/
660	<	public void testSet1_IndexOutOfBoundsException() {
661	<	try {
662	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
663	<	c.set(-1,"qwerty");
664	<	shouldThrow();
665	<	} catch(IndexOutOfBoundsException e){}
666	<	}
667	<
668	<	/**
669	<	*   set throws an IndexOutOfBoundsException on a too high index
670	<	*/
671	<	public void testSet2() {
672	<	try {
673	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
674	<	c.add("asdasd");
675	<	c.add("asdad");
676	<	c.set(100, "qwerty");
677	<	shouldThrow();
678	<	} catch(IndexOutOfBoundsException e){}
679	<	}
680	<
681	<	/**
682	<	*   add throws an IndexOutOfBoundsException on a negative index
683	<	*/
684	<	public void testAdd1_IndexOutOfBoundsException() {
685	<	try {
686	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
687	<	c.add(-1,"qwerty");
688	<	shouldThrow();
689	<	} catch(IndexOutOfBoundsException e){}
690	<	}
691	<
692	<	/**
693	<	*   add throws an IndexOutOfBoundsException on a too high index
694	<	*/
695	<	public void testAdd2_IndexOutOfBoundsException() {
696	<	try {
697	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
698	<	c.add("asdasd");
699	<	c.add("asdasdasd");
700	<	c.add(100, "qwerty");
485	<	shouldThrow();
486	<	} catch(IndexOutOfBoundsException e){}
487	<	}
488	<
489	<	/**
490	<	*   remove throws an IndexOutOfBoundsException on a negative index
491	<	*/
492	<	public void testRemove1_IndexOutOfBounds() {
493	<	try {
494	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
495	<	c.remove(-1);
496	<	shouldThrow();
497	<	} catch(IndexOutOfBoundsException e){}
498	<	}
499	<
500	<	/**
501	<	*   remove throws an IndexOutOfBoundsException on a too high index
502	<	*/
503	<	public void testRemove2_IndexOutOfBounds() {
504	<	try {
505	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
506	<	c.add("asdasd");
507	<	c.add("adasdasd");
508	<	c.remove(100);
509	<	shouldThrow();
510	<	} catch(IndexOutOfBoundsException e){}
511	<	}
512	<
513	<	/**
514	<	*   addAll throws an IndexOutOfBoundsException on a negative index
515	<	*/
516	<	public void testAddAll1_IndexOutOfBoundsException() {
517	<	try {
518	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
519	<	c.addAll(-1,new LinkedList());
520	<	shouldThrow();
521	<	} catch(IndexOutOfBoundsException e){}
522	<	}
523	<
524	<	/**
525	<	*   addAll throws an IndexOutOfBoundsException on a too high index
526	<	*/
527	<	public void testAddAll2_IndexOutOfBoundsException() {
528	<	try {
529	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
530	<	c.add("asdasd");
531	<	c.add("asdasdasd");
532	<	c.addAll(100, new LinkedList());
533	<	shouldThrow();
534	<	} catch(IndexOutOfBoundsException e){}
535	<	}
536	<
537	<	/**
538	<	*   listIterator throws an IndexOutOfBoundsException on a negative index
539	<	*/
540	<	public void testListIterator1_IndexOutOfBoundsException() {
541	<	try {
542	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
543	<	c.listIterator(-1);
544	<	shouldThrow();
545	<	} catch(IndexOutOfBoundsException e){}
546	<	}
547	<
548	<	/**
549	<	*   listIterator throws an IndexOutOfBoundsException on a too high index
550	<	*/
551	<	public void testListIterator2_IndexOutOfBoundsException() {
552	<	try {
553	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
554	<	c.add("adasd");
555	<	c.add("asdasdas");
556	<	c.listIterator(100);
557	<	shouldThrow();
558	<	} catch(IndexOutOfBoundsException e){}
559	<	}
560	<
561	<	/**
562	<	*   subList throws an IndexOutOfBoundsException on a negative index
563	<	*/
564	<	public void testSubList1_IndexOutOfBoundsException() {
565	<	try {
566	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
567	<	c.subList(-1,100);
568	<
569	<	shouldThrow();
570	<	} catch(IndexOutOfBoundsException e){}
571	<	}
572	<
573	<	/**
574	<	*   subList throws an IndexOutOfBoundsException on a too high index
575	<	*/
576	<	public void testSubList2_IndexOutOfBoundsException() {
577	<	try {
578	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
579	<	c.add("asdasd");
580	<	c.subList(1,100);
581	<	shouldThrow();
582	<	} catch(IndexOutOfBoundsException e){}
583	<	}
584	<
585	<	/**
586	<	*   subList throws IndexOutOfBoundsException when the second index
587	<	*  is lower then the first
588	<	*/
589	<	public void testSubList3_IndexOutOfBoundsException() {
590	<	try {
591	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
592	<	c.subList(3,1);
593	<
594	<	shouldThrow();
595	<	} catch(IndexOutOfBoundsException e){}
596	<	}
597	<
598	<	/**
599	<	* a deserialized serialiszed list is equal
600	<	*/
601	<	public void testSerialization() {
602	<	CopyOnWriteArrayList q = populatedArray(SIZE);
603	<
604	<	try {
605	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
606	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
607	<	out.writeObject(q);
608	<	out.close();
609	<
610	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
611	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
612	<	CopyOnWriteArrayList r = (CopyOnWriteArrayList)in.readObject();
613	<	assertEquals(q.size(), r.size());
614	<	assertTrue(q.equals(r));
615	<	assertTrue(r.equals(q));
616	<	} catch(Exception e){
617	<	unexpectedException();
624	>	List list = new CopyOnWriteArrayList();
625	>	// Integers are not auto-converted to Longs
626	>	list.add(86);
627	>	list.add(99);
628	>	assertThrows(
629	>	ArrayStoreException.class,
630	>	() -> list.toArray(new Long[0]),
631	>	() -> list.toArray(new Long[5]));
632	>	}
633	>
634	>	void testIndexOutOfBoundsException(List list) {
635	>	int size = list.size();
636	>	assertThrows(
637	>	IndexOutOfBoundsException.class,
638	>	() -> list.get(-1),
639	>	() -> list.get(size),
640	>	() -> list.set(-1, "qwerty"),
641	>	() -> list.set(size, "qwerty"),
642	>	() -> list.add(-1, "qwerty"),
643	>	() -> list.add(size + 1, "qwerty"),
644	>	() -> list.remove(-1),
645	>	() -> list.remove(size),
646	>	() -> list.addAll(-1, Collections.emptyList()),
647	>	() -> list.addAll(size + 1, Collections.emptyList()),
648	>	() -> list.listIterator(-1),
649	>	() -> list.listIterator(size + 1),
650	>	() -> list.subList(-1, size),
651	>	() -> list.subList(0, size + 1));
652	>
653	>	// Conversely, operations that must not throw
654	>	list.addAll(0, Collections.emptyList());
655	>	list.addAll(size, Collections.emptyList());
656	>	list.add(0, "qwerty");
657	>	list.add(list.size(), "qwerty");
658	>	list.get(0);
659	>	list.get(list.size() - 1);
660	>	list.set(0, "azerty");
661	>	list.set(list.size() - 1, "azerty");
662	>	list.listIterator(0);
663	>	list.listIterator(list.size());
664	>	list.subList(0, list.size());
665	>	list.remove(list.size() - 1);
666	>	}
667	>
668	>	/**
669	>	* IndexOutOfBoundsException is thrown when specified
670	>	*/
671	>	public void testIndexOutOfBoundsException() {
672	>	ThreadLocalRandom rnd = ThreadLocalRandom.current();
673	>	List x = populatedList(rnd.nextInt(5));
674	>	testIndexOutOfBoundsException(x);
675	>
676	>	int start = rnd.nextInt(x.size() + 1);
677	>	int end = rnd.nextInt(start, x.size() + 1);
678	>	assertThrows(
679	>	IndexOutOfBoundsException.class,
680	>	() -> x.subList(start, start - 1));
681	>	List subList = x.subList(start, end);
682	>	testIndexOutOfBoundsException(x);
683	>	}
684	>
685	>	/**
686	>	* a deserialized/reserialized list equals original
687	>	*/
688	>	public void testSerialization() throws Exception {
689	>	List x = populatedList(SIZE);
690	>	List y = serialClone(x);
691	>
692	>	assertNotSame(x, y);
693	>	assertEquals(x.size(), y.size());
694	>	assertEquals(x.toString(), y.toString());
695	>	assertTrue(Arrays.equals(x.toArray(), y.toArray()));
696	>	assertEquals(x, y);
697	>	assertEquals(y, x);
698	>	while (!x.isEmpty()) {
699	>	assertFalse(y.isEmpty());
700	>	assertEquals(x.remove(0), y.remove(0));
701		}
702	+	assertTrue(y.isEmpty());
703		}
704	<
704	>
705		}

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