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Comparing jsr166/src/test/tck/CopyOnWriteArrayListTest.java (file contents):
Revision 1.6 by dl, Sat Dec 27 19:26:43 2003 UTC vs.
Revision 1.48 by jsr166, Tue Apr 3 00:58:28 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	>	return super.emptyCollection().subList(0, 0);
39	>	}
40	>	}
41	>	return newTestSuite(
42	>	CopyOnWriteArrayListTest.class,
43	>	CollectionTest.testSuite(new Implementation()),
44	>	CollectionTest.testSuite(new SubListImplementation()));
45	>	}
46	>
47	>	static CopyOnWriteArrayList<Integer> populatedList(int n) {
48	>	CopyOnWriteArrayList<Integer> list = new CopyOnWriteArrayList<>();
49	>	assertTrue(list.isEmpty());
50	>	for (int i = 0; i < n; i++)
51	>	list.add(i);
52	>	assertEquals(n <= 0, list.isEmpty());
53	>	assertEquals(n, list.size());
54	>	return list;
55	>	}
56	>
57	>	static CopyOnWriteArrayList<Integer> populatedList(Integer[] elements) {
58	>	CopyOnWriteArrayList<Integer> list = new CopyOnWriteArrayList<>();
59	>	assertTrue(list.isEmpty());
60	>	for (Integer element : elements)
61	>	list.add(element);
62	>	assertFalse(list.isEmpty());
63	>	assertEquals(elements.length, list.size());
64	>	return list;
65		}
66
34	–
67		/**
68		* a new list is empty
69		*/
70		public void testConstructor() {
71	<	CopyOnWriteArrayList a = new CopyOnWriteArrayList();
72	<	assertTrue(a.isEmpty());
71	>	List list = new CopyOnWriteArrayList();
72	>	assertTrue(list.isEmpty());
73		}
74
75		/**
76		* new list contains all elements of initializing array
77		*/
78		public void testConstructor2() {
79	<	Integer[] ints = new Integer[SIZE];
80	<	for (int i = 0; i < SIZE-1; ++i)
81	<	ints[i] = new Integer(i);
82	<	CopyOnWriteArrayList a = new CopyOnWriteArrayList(ints);
83	<	for (int i = 0; i < SIZE; ++i)
84	<	assertEquals(ints[i], a.get(i));
79	>	Integer[] elts = new Integer[SIZE];
80	>	for (int i = 0; i < SIZE - 1; ++i)
81	>	elts[i] = i;
82	>	List list = new CopyOnWriteArrayList(elts);
83	>	for (int i = 0; i < SIZE; ++i)
84	>	assertEquals(elts[i], list.get(i));
85		}
86
87		/**
88		* new list contains all elements of initializing collection
89		*/
90		public void testConstructor3() {
91	<	Integer[] ints = new Integer[SIZE];
92	<	for (int i = 0; i < SIZE-1; ++i)
93	<	ints[i] = new Integer(i);
94	<	CopyOnWriteArrayList a = new CopyOnWriteArrayList(Arrays.asList(ints));
95	<	for (int i = 0; i < SIZE; ++i)
96	<	assertEquals(ints[i], a.get(i));
91	>	Integer[] elts = new Integer[SIZE];
92	>	for (int i = 0; i < SIZE - 1; ++i)
93	>	elts[i] = i;
94	>	List list = new CopyOnWriteArrayList(Arrays.asList(elts));
95	>	for (int i = 0; i < SIZE; ++i)
96	>	assertEquals(elts[i], list.get(i));
97		}
66	–
98
99		/**
100	<	*   addAll  adds each element from the given collection
100	>	* addAll adds each element from the given collection, including duplicates
101		*/
102		public void testAddAll() {
103	<	CopyOnWriteArrayList full = populatedArray(3);
104	<	Vector v = new Vector();
105	<	v.add(three);
106	<	v.add(four);
107	<	v.add(five);
77	<	full.addAll(v);
78	<	assertEquals(6, full.size());
103	>	List list = populatedList(3);
104	>	assertTrue(list.addAll(Arrays.asList(three, four, five)));
105	>	assertEquals(6, list.size());
106	>	assertTrue(list.addAll(Arrays.asList(three, four, five)));
107	>	assertEquals(9, list.size());
108		}
109
110		/**
111	<	*   addAllAbsent adds each element from the given collection that did not
112	<	*  already exist in the List
111	>	* addAllAbsent adds each element from the given collection that did not
112	>	* already exist in the List
113		*/
114		public void testAddAllAbsent() {
115	<	CopyOnWriteArrayList full = populatedArray(3);
116	<	Vector v = new Vector();
117	<	v.add(three);
118	<	v.add(four);
119	<	v.add(one); // will not add this element
120	<	full.addAllAbsent(v);
92	<	assertEquals(5, full.size());
115	>	CopyOnWriteArrayList list = populatedList(3);
116	>	// "one" is duplicate and will not be added
117	>	assertEquals(2, list.addAllAbsent(Arrays.asList(three, four, one)));
118	>	assertEquals(5, list.size());
119	>	assertEquals(0, list.addAllAbsent(Arrays.asList(three, four, one)));
120	>	assertEquals(5, list.size());
121		}
122
123		/**
124	<	*   addIfAbsent will not add the element if it already exists in the list
124	>	* addIfAbsent will not add the element if it already exists in the list
125		*/
126		public void testAddIfAbsent() {
127	<	CopyOnWriteArrayList full = populatedArray(SIZE);
128	<	full.addIfAbsent(one);
129	<	assertEquals(SIZE, full.size());
127	>	CopyOnWriteArrayList list = populatedList(SIZE);
128	>	list.addIfAbsent(one);
129	>	assertEquals(SIZE, list.size());
130		}
131
132		/**
133	<	*   addIfAbsent adds the element when it does not exist in the list
133	>	* addIfAbsent adds the element when it does not exist in the list
134		*/
135		public void testAddIfAbsent2() {
136	<	CopyOnWriteArrayList full = populatedArray(SIZE);
137	<	full.addIfAbsent(three);
138	<	assertTrue(full.contains(three));
136	>	CopyOnWriteArrayList list = populatedList(SIZE);
137	>	list.addIfAbsent(three);
138	>	assertTrue(list.contains(three));
139		}
140
141		/**
142	<	*   clear removes all elements from the list
142	>	* clear removes all elements from the list
143		*/
144		public void testClear() {
145	<	CopyOnWriteArrayList full = populatedArray(SIZE);
146	<	full.clear();
147	<	assertEquals(0, full.size());
145	>	List list = populatedList(SIZE);
146	>	list.clear();
147	>	assertEquals(0, list.size());
148		}
149
122	–
150		/**
151	<	*  Cloned list is equal
151	>	* Cloned list is equal
152		*/
153		public void testClone() {
154	<	CopyOnWriteArrayList l1 = populatedArray(SIZE);
155	<	CopyOnWriteArrayList l2 = (CopyOnWriteArrayList)(l1.clone());
154	>	CopyOnWriteArrayList l1 = populatedList(SIZE);
155	>	CopyOnWriteArrayList l2 = (CopyOnWriteArrayList)(l1.clone());
156		assertEquals(l1, l2);
157	<	l1.clear();
157	>	l1.clear();
158		assertFalse(l1.equals(l2));
159		}
160
161		/**
162	<	*   contains is true for added elements
162	>	* contains is true for added elements
163		*/
164		public void testContains() {
165	<	CopyOnWriteArrayList full = populatedArray(3);
166	<	assertTrue(full.contains(one));
167	<	assertFalse(full.contains(five));
165	>	List list = populatedList(3);
166	>	assertTrue(list.contains(one));
167	>	assertFalse(list.contains(five));
168		}
169
170		/**
171	<	* adding at an index places it in the indindicated index
171	>	* adding at an index places it in the indicated index
172		*/
173		public void testAddIndex() {
174	<	CopyOnWriteArrayList full = populatedArray(3);
175	<	full.add(0, m1);
176	<	assertEquals(4, full.size());
177	<	assertEquals(m1, full.get(0));
178	<	assertEquals(zero, full.get(1));
179	<
180	<	full.add(2, m2);
181	<	assertEquals(5, full.size());
182	<	assertEquals(m2, full.get(2));
183	<	assertEquals(two, full.get(4));
174	>	List list = populatedList(3);
175	>	list.add(0, m1);
176	>	assertEquals(4, list.size());
177	>	assertEquals(m1, list.get(0));
178	>	assertEquals(zero, list.get(1));
179	>
180	>	list.add(2, m2);
181	>	assertEquals(5, list.size());
182	>	assertEquals(m2, list.get(2));
183	>	assertEquals(two, list.get(4));
184		}
185
186		/**
187		* lists with same elements are equal and have same hashCode
188		*/
189		public void testEquals() {
190	<	CopyOnWriteArrayList a = populatedArray(3);
191	<	CopyOnWriteArrayList b = populatedArray(3);
190	>	List a = populatedList(3);
191	>	List b = populatedList(3);
192		assertTrue(a.equals(b));
193		assertTrue(b.equals(a));
194	+	assertTrue(a.containsAll(b));
195	+	assertTrue(b.containsAll(a));
196		assertEquals(a.hashCode(), b.hashCode());
197		a.add(m1);
198		assertFalse(a.equals(b));
199		assertFalse(b.equals(a));
200	+	assertTrue(a.containsAll(b));
201	+	assertFalse(b.containsAll(a));
202		b.add(m1);
203		assertTrue(a.equals(b));
204		assertTrue(b.equals(a));
205	+	assertTrue(a.containsAll(b));
206	+	assertTrue(b.containsAll(a));
207		assertEquals(a.hashCode(), b.hashCode());
208	+
209	+	assertFalse(a.equals(null));
210		}
211
177	–
212		/**
213	<	*   containsAll returns true for collection with subset of elements
213	>	* containsAll returns true for collections with subset of elements
214		*/
215		public void testContainsAll() {
216	<	CopyOnWriteArrayList full = populatedArray(3);
217	<	Vector v = new Vector();
218	<	v.add(one);
219	<	v.add(two);
220	<	assertTrue(full.containsAll(v));
221	<	v.add(six);
222	<	assertFalse(full.containsAll(v));
216	>	List list = populatedList(3);
217	>	assertTrue(list.containsAll(Arrays.asList()));
218	>	assertTrue(list.containsAll(Arrays.asList(one)));
219	>	assertTrue(list.containsAll(Arrays.asList(one, two)));
220	>	assertFalse(list.containsAll(Arrays.asList(one, two, six)));
221	>	assertFalse(list.containsAll(Arrays.asList(six)));
222	>
223	>	try {
224	>	list.containsAll(null);
225	>	shouldThrow();
226	>	} catch (NullPointerException success) {}
227		}
228
229		/**
230	<	*   get returns the  value at the given index
230	>	* get returns the value at the given index
231		*/
232		public void testGet() {
233	<	CopyOnWriteArrayList full = populatedArray(3);
234	<	assertEquals(0, ((Integer)full.get(0)).intValue());
233	>	List list = populatedList(3);
234	>	assertEquals(0, list.get(0));
235		}
236
237		/**
238	<	*   indexOf gives the index for the given object
238	>	* indexOf(Object) returns the index of the first occurrence of the
239	>	* specified element in this list, or -1 if this list does not
240	>	* contain the element
241		*/
242		public void testIndexOf() {
243	<	CopyOnWriteArrayList full = populatedArray(3);
244	<	assertEquals(1, full.indexOf(one));
245	<	assertEquals(-1, full.indexOf("puppies"));
243	>	List list = populatedList(3);
244	>	assertEquals(-1, list.indexOf(-42));
245	>	int size = list.size();
246	>	for (int i = 0; i < size; i++) {
247	>	assertEquals(i, list.indexOf(i));
248	>	assertEquals(i, list.subList(0, size).indexOf(i));
249	>	assertEquals(i, list.subList(0, i + 1).indexOf(i));
250	>	assertEquals(-1, list.subList(0, i).indexOf(i));
251	>	assertEquals(0, list.subList(i, size).indexOf(i));
252	>	assertEquals(-1, list.subList(i + 1, size).indexOf(i));
253	>	}
254	>
255	>	list.add(1);
256	>	assertEquals(1, list.indexOf(1));
257	>	assertEquals(1, list.subList(0, size + 1).indexOf(1));
258	>	assertEquals(0, list.subList(1, size + 1).indexOf(1));
259	>	assertEquals(size - 2, list.subList(2, size + 1).indexOf(1));
260	>	assertEquals(0, list.subList(size, size + 1).indexOf(1));
261	>	assertEquals(-1, list.subList(size + 1, size + 1).indexOf(1));
262		}
263
264		/**
265	<	*   indexOf gives the index based on the given index
266	<	*  at which to start searching
265	>	* indexOf(E, int) returns the index of the first occurrence of the
266	>	* specified element in this list, searching forwards from index,
267	>	* or returns -1 if the element is not found
268		*/
269		public void testIndexOf2() {
270	<	CopyOnWriteArrayList full = populatedArray(3);
271	<	assertEquals(1, full.indexOf(one, 0));
272	<	assertEquals(-1, full.indexOf(one, 2));
270	>	CopyOnWriteArrayList list = populatedList(3);
271	>	int size = list.size();
272	>	assertEquals(-1, list.indexOf(-42, 0));
273	>
274	>	// we might expect IOOBE, but spec says otherwise
275	>	assertEquals(-1, list.indexOf(0, size));
276	>	assertEquals(-1, list.indexOf(0, Integer.MAX_VALUE));
277	>
278	>	assertThrows(
279	>	IndexOutOfBoundsException.class,
280	>	() -> list.indexOf(0, -1),
281	>	() -> list.indexOf(0, Integer.MIN_VALUE));
282	>
283	>	for (int i = 0; i < size; i++) {
284	>	assertEquals(i, list.indexOf(i, 0));
285	>	assertEquals(i, list.indexOf(i, i));
286	>	assertEquals(-1, list.indexOf(i, i + 1));
287	>	}
288	>
289	>	list.add(1);
290	>	assertEquals(1, list.indexOf(1, 0));
291	>	assertEquals(1, list.indexOf(1, 1));
292	>	assertEquals(size, list.indexOf(1, 2));
293	>	assertEquals(size, list.indexOf(1, size));
294		}
295
296		/**
297	<	*   isEmpty returns true when empty, else false
297	>	* isEmpty returns true when empty, else false
298		*/
299		public void testIsEmpty() {
300	<	CopyOnWriteArrayList empty = new CopyOnWriteArrayList();
301	<	CopyOnWriteArrayList full = populatedArray(SIZE);
302	<	assertTrue(empty.isEmpty());
303	<	assertFalse(full.isEmpty());
300	>	List empty = new CopyOnWriteArrayList();
301	>	assertTrue(empty.isEmpty());
302	>	assertTrue(empty.subList(0, 0).isEmpty());
303	>
304	>	List full = populatedList(SIZE);
305	>	assertFalse(full.isEmpty());
306	>	assertTrue(full.subList(0, 0).isEmpty());
307	>	assertTrue(full.subList(SIZE, SIZE).isEmpty());
308		}
309
310		/**
311	<	*   iterator() returns an iterator containing the elements of the list
311	>	* iterator() returns an iterator containing the elements of the
312	>	* list in insertion order
313		*/
314		public void testIterator() {
315	<	CopyOnWriteArrayList full = populatedArray(SIZE);
316	<	Iterator i = full.iterator();
317	<	int j;
318	<	for(j = 0; i.hasNext(); j++)
319	<	assertEquals(j, ((Integer)i.next()).intValue());
320	<	assertEquals(SIZE, j);
315	>	Collection empty = new CopyOnWriteArrayList();
316	>	assertFalse(empty.iterator().hasNext());
317	>	try {
318	>	empty.iterator().next();
319	>	shouldThrow();
320	>	} catch (NoSuchElementException success) {}
321	>
322	>	Integer[] elements = new Integer[SIZE];
323	>	for (int i = 0; i < SIZE; i++)
324	>	elements[i] = i;
325	>	shuffle(elements);
326	>	Collection<Integer> full = populatedList(elements);
327	>
328	>	Iterator it = full.iterator();
329	>	for (int j = 0; j < SIZE; j++) {
330	>	assertTrue(it.hasNext());
331	>	assertEquals(elements[j], it.next());
332	>	}
333	>	assertIteratorExhausted(it);
334	>	}
335	>
336	>	/**
337	>	* iterator of empty collection has no elements
338	>	*/
339	>	public void testEmptyIterator() {
340	>	Collection c = new CopyOnWriteArrayList();
341	>	assertIteratorExhausted(c.iterator());
342		}
343
344		/**
345		* iterator.remove throws UnsupportedOperationException
346		*/
347	<	public void testIteratorRemove () {
348	<	CopyOnWriteArrayList full = populatedArray(SIZE);
349	<	Iterator it = full.iterator();
347	>	public void testIteratorRemove() {
348	>	CopyOnWriteArrayList list = populatedList(SIZE);
349	>	Iterator it = list.iterator();
350		it.next();
351		try {
352		it.remove();
353		shouldThrow();
354	<	}
251	<	catch (UnsupportedOperationException success) {}
354	>	} catch (UnsupportedOperationException success) {}
355		}
356
357		/**
358		* toString contains toString of elements
359		*/
360		public void testToString() {
361	<	CopyOnWriteArrayList full = populatedArray(3);
362	<	String s = full.toString();
363	<	for (int i = 0; i < 3; ++i) {
364	<	assertTrue(s.indexOf(String.valueOf(i)) >= 0);
365	<	}
366	<	}
361	>	assertEquals("[]", new CopyOnWriteArrayList().toString());
362	>	List list = populatedList(3);
363	>	String s = list.toString();
364	>	for (int i = 0; i < 3; ++i)
365	>	assertTrue(s.contains(String.valueOf(i)));
366	>	assertEquals(new ArrayList(list).toString(),
367	>	list.toString());
368	>	}
369
370		/**
371	<	*   lastIndexOf returns the index for the given object
371	>	* lastIndexOf(Object) returns the index of the last occurrence of
372	>	* the specified element in this list, or -1 if this list does not
373	>	* contain the element
374		*/
375		public void testLastIndexOf1() {
376	<	CopyOnWriteArrayList full = populatedArray(3);
377	<	full.add(one);
378	<	full.add(three);
379	<	assertEquals(3, full.lastIndexOf(one));
380	<	assertEquals(-1, full.lastIndexOf(six));
376	>	List list = populatedList(3);
377	>	assertEquals(-1, list.lastIndexOf(-42));
378	>	int size = list.size();
379	>	for (int i = 0; i < size; i++) {
380	>	assertEquals(i, list.lastIndexOf(i));
381	>	assertEquals(i, list.subList(0, size).lastIndexOf(i));
382	>	assertEquals(i, list.subList(0, i + 1).lastIndexOf(i));
383	>	assertEquals(-1, list.subList(0, i).lastIndexOf(i));
384	>	assertEquals(0, list.subList(i, size).lastIndexOf(i));
385	>	assertEquals(-1, list.subList(i + 1, size).lastIndexOf(i));
386	>	}
387	>
388	>	list.add(1);
389	>	assertEquals(size, list.lastIndexOf(1));
390	>	assertEquals(size, list.subList(0, size + 1).lastIndexOf(1));
391	>	assertEquals(1, list.subList(0, size).lastIndexOf(1));
392	>	assertEquals(0, list.subList(1, 2).lastIndexOf(1));
393	>	assertEquals(-1, list.subList(0, 1).indexOf(1));
394		}
395
396		/**
397	<	*   lastIndexOf returns the index from the given starting point
398	<	*/
399	<	public void testlastIndexOf2() {
400	<	CopyOnWriteArrayList full = populatedArray(3);
401	<	full.add(one);
402	<	full.add(three);
403	<	assertEquals(3, full.lastIndexOf(one, 4));
404	<	assertEquals(-1, full.lastIndexOf(three, 3));
397	>	* lastIndexOf(E, int) returns the index of the last occurrence of the
398	>	* specified element in this list, searching backwards from index, or
399	>	* returns -1 if the element is not found
400	>	*/
401	>	public void testLastIndexOf2() {
402	>	CopyOnWriteArrayList list = populatedList(3);
403	>
404	>	// we might expect IOOBE, but spec says otherwise
405	>	assertEquals(-1, list.lastIndexOf(0, -1));
406	>
407	>	int size = list.size();
408	>	assertThrows(
409	>	IndexOutOfBoundsException.class,
410	>	() -> list.lastIndexOf(0, size),
411	>	() -> list.lastIndexOf(0, Integer.MAX_VALUE));
412	>
413	>	for (int i = 0; i < size; i++) {
414	>	assertEquals(i, list.lastIndexOf(i, i));
415	>	assertEquals(list.indexOf(i), list.lastIndexOf(i, i));
416	>	if (i > 0)
417	>	assertEquals(-1, list.lastIndexOf(i, i - 1));
418	>	}
419	>	list.add(one);
420	>	list.add(three);
421	>	assertEquals(1, list.lastIndexOf(one, 1));
422	>	assertEquals(1, list.lastIndexOf(one, 2));
423	>	assertEquals(3, list.lastIndexOf(one, 3));
424	>	assertEquals(3, list.lastIndexOf(one, 4));
425	>	assertEquals(-1, list.lastIndexOf(three, 3));
426		}
427
428		/**
429	<	*  listIterator traverses all elements
429	>	* listIterator traverses all elements
430		*/
431		public void testListIterator1() {
432	<	CopyOnWriteArrayList full = populatedArray(SIZE);
433	<	ListIterator i = full.listIterator();
434	<	int j;
435	<	for(j = 0; i.hasNext(); j++)
436	<	assertEquals(j, ((Integer)i.next()).intValue());
437	<	assertEquals(SIZE, j);
432	>	List list = populatedList(SIZE);
433	>	ListIterator i = list.listIterator();
434	>	int j;
435	>	for (j = 0; i.hasNext(); j++)
436	>	assertEquals(j, i.next());
437	>	assertEquals(SIZE, j);
438		}
439
440		/**
441	<	*  listIterator only returns those elements after the given index
441	>	* listIterator only returns those elements after the given index
442		*/
443		public void testListIterator2() {
444	<	CopyOnWriteArrayList full = populatedArray(3);
445	<	ListIterator i = full.listIterator(1);
446	<	int j;
447	<	for(j = 0; i.hasNext(); j++)
448	<	assertEquals(j+1, ((Integer)i.next()).intValue());
449	<	assertEquals(2, j);
444	>	List list = populatedList(3);
445	>	ListIterator i = list.listIterator(1);
446	>	int j;
447	>	for (j = 0; i.hasNext(); j++)
448	>	assertEquals(j + 1, i.next());
449	>	assertEquals(2, j);
450	>	}
451	>
452	>	/**
453	>	* remove(int) removes and returns the object at the given index
454	>	*/
455	>	public void testRemove_int() {
456	>	int SIZE = 3;
457	>	for (int i = 0; i < SIZE; i++) {
458	>	List list = populatedList(SIZE);
459	>	assertEquals(i, list.remove(i));
460	>	assertEquals(SIZE - 1, list.size());
461	>	assertFalse(list.contains(new Integer(i)));
462	>	}
463		}
464
465		/**
466	<	*   remove  removes and returns the object at the given index
466	>	* remove(Object) removes the object if found and returns true
467		*/
468	<	public void testRemove() {
469	<	CopyOnWriteArrayList full = populatedArray(3);
470	<	assertEquals(two, full.remove(2));
471	<	assertEquals(2, full.size());
468	>	public void testRemove_Object() {
469	>	int SIZE = 3;
470	>	for (int i = 0; i < SIZE; i++) {
471	>	List list = populatedList(SIZE);
472	>	assertFalse(list.remove(new Integer(-42)));
473	>	assertTrue(list.remove(new Integer(i)));
474	>	assertEquals(SIZE - 1, list.size());
475	>	assertFalse(list.contains(new Integer(i)));
476	>	}
477	>	CopyOnWriteArrayList x = new CopyOnWriteArrayList(Arrays.asList(4, 5, 6));
478	>	assertTrue(x.remove(new Integer(6)));
479	>	assertEquals(x, Arrays.asList(4, 5));
480	>	assertTrue(x.remove(new Integer(4)));
481	>	assertEquals(x, Arrays.asList(5));
482	>	assertTrue(x.remove(new Integer(5)));
483	>	assertEquals(x, Arrays.asList());
484	>	assertFalse(x.remove(new Integer(5)));
485		}
486
487		/**
488	<	*   removeAll  removes all elements from the given collection
488	>	* removeAll removes all elements from the given collection
489		*/
490		public void testRemoveAll() {
491	<	CopyOnWriteArrayList full = populatedArray(3);
492	<	Vector v = new Vector();
493	<	v.add(one);
494	<	v.add(two);
495	<	full.removeAll(v);
329	<	assertEquals(1, full.size());
491	>	List list = populatedList(3);
492	>	assertTrue(list.removeAll(Arrays.asList(one, two)));
493	>	assertEquals(1, list.size());
494	>	assertFalse(list.removeAll(Arrays.asList(one, two)));
495	>	assertEquals(1, list.size());
496		}
497
498		/**
499	<	*   set  changes the element at the given index
499	>	* set changes the element at the given index
500		*/
501		public void testSet() {
502	<	CopyOnWriteArrayList full = populatedArray(3);
503	<	assertEquals(two, full.set(2, four));
504	<	assertEquals(4, ((Integer)full.get(2)).intValue());
502	>	List list = populatedList(3);
503	>	assertEquals(2, list.set(2, four));
504	>	assertEquals(4, list.get(2));
505		}
506
507		/**
508	<	*   size returns the number of elements
508	>	* size returns the number of elements
509		*/
510		public void testSize() {
511	<	CopyOnWriteArrayList empty = new CopyOnWriteArrayList();
512	<	CopyOnWriteArrayList full = populatedArray(SIZE);
513	<	assertEquals(SIZE, full.size());
514	<	assertEquals(0, empty.size());
511	>	List empty = new CopyOnWriteArrayList();
512	>	assertEquals(0, empty.size());
513	>	assertEquals(0, empty.subList(0, 0).size());
514	>
515	>	List full = populatedList(SIZE);
516	>	assertEquals(SIZE, full.size());
517	>	assertEquals(0, full.subList(0, 0).size());
518	>	assertEquals(0, full.subList(SIZE, SIZE).size());
519		}
520
521		/**
522	<	*   toArray returns an Object array containing all elements from the list
522	>	* toArray() returns an Object array containing all elements from
523	>	* the list in insertion order
524		*/
525		public void testToArray() {
526	<	CopyOnWriteArrayList full = populatedArray(3);
527	<	Object[] o = full.toArray();
528	<	assertEquals(3, o.length);
529	<	assertEquals(0, ((Integer)o[0]).intValue());
530	<	assertEquals(1, ((Integer)o[1]).intValue());
531	<	assertEquals(2, ((Integer)o[2]).intValue());
526	>	Object[] a = new CopyOnWriteArrayList().toArray();
527	>	assertTrue(Arrays.equals(new Object[0], a));
528	>	assertSame(Object[].class, a.getClass());
529	>
530	>	Integer[] elements = new Integer[SIZE];
531	>	for (int i = 0; i < SIZE; i++)
532	>	elements[i] = i;
533	>	shuffle(elements);
534	>	Collection<Integer> full = populatedList(elements);
535	>
536	>	assertTrue(Arrays.equals(elements, full.toArray()));
537	>	assertSame(Object[].class, full.toArray().getClass());
538		}
539
540		/**
541	<	*   toArray returns an Integer array containing all elements from
542	<	*   the list
541	>	* toArray(Integer array) returns an Integer array containing all
542	>	* elements from the list in insertion order
543		*/
544		public void testToArray2() {
545	<	CopyOnWriteArrayList full = populatedArray(3);
546	<	Integer[] i = new Integer[3];
547	<	i = (Integer[])full.toArray(i);
548	<	assertEquals(3, i.length);
549	<	assertEquals(0, i[0].intValue());
373	<	assertEquals(1, i[1].intValue());
374	<	assertEquals(2, i[2].intValue());
375	<	}
545	>	Collection empty = new CopyOnWriteArrayList();
546	>	Integer[] a;
547	>
548	>	a = new Integer[0];
549	>	assertSame(a, empty.toArray(a));
550
551	+	a = new Integer[SIZE / 2];
552	+	Arrays.fill(a, 42);
553	+	assertSame(a, empty.toArray(a));
554	+	assertNull(a[0]);
555	+	for (int i = 1; i < a.length; i++)
556	+	assertEquals(42, (int) a[i]);
557	+
558	+	Integer[] elements = new Integer[SIZE];
559	+	for (int i = 0; i < SIZE; i++)
560	+	elements[i] = i;
561	+	shuffle(elements);
562	+	Collection<Integer> full = populatedList(elements);
563	+
564	+	Arrays.fill(a, 42);
565	+	assertTrue(Arrays.equals(elements, full.toArray(a)));
566	+	for (int i = 0; i < a.length; i++)
567	+	assertEquals(42, (int) a[i]);
568	+	assertSame(Integer[].class, full.toArray(a).getClass());
569	+
570	+	a = new Integer[SIZE];
571	+	Arrays.fill(a, 42);
572	+	assertSame(a, full.toArray(a));
573	+	assertTrue(Arrays.equals(elements, a));
574	+
575	+	a = new Integer[2 * SIZE];
576	+	Arrays.fill(a, 42);
577	+	assertSame(a, full.toArray(a));
578	+	assertTrue(Arrays.equals(elements, Arrays.copyOf(a, SIZE)));
579	+	assertNull(a[SIZE]);
580	+	for (int i = SIZE + 1; i < a.length; i++)
581	+	assertEquals(42, (int) a[i]);
582	+	}
583
584		/**
585		* sublists contains elements at indexes offset from their base
586		*/
587		public void testSubList() {
588	<	CopyOnWriteArrayList a = populatedArray(10);
588	>	List a = populatedList(10);
589		assertTrue(a.subList(1,1).isEmpty());
590	<	for(int j = 0; j < 9; ++j) {
591	<	for(int i = j ; i < 10; ++i) {
592	<	List b = a.subList(j,i);
593	<	for(int k = j; k < i; ++k) {
594	<	assertEquals(new Integer(k), b.get(k-j));
595	<	}
596	<	}
597	<	}
590	>	for (int j = 0; j < 9; ++j) {
591	>	for (int i = j ; i < 10; ++i) {
592	>	List b = a.subList(j,i);
593	>	for (int k = j; k < i; ++k) {
594	>	assertEquals(new Integer(k), b.get(k-j));
595	>	}
596	>	}
597	>	}
598
599	<	List s = a.subList(2, 5);
600	<	assertEquals(s.size(), 3);
599	>	List s = a.subList(2, 5);
600	>	assertEquals(3, s.size());
601		s.set(2, m1);
602		assertEquals(a.get(4), m1);
603	<	s.clear();
604	<	assertEquals(a.size(), 7);
603	>	s.clear();
604	>	assertEquals(7, a.size());
605	>
606	>	assertThrows(
607	>	IndexOutOfBoundsException.class,
608	>	() -> s.get(0),
609	>	() -> s.set(0, 42));
610		}
611
612		// Exception tests
613
614		/**
615	<	*   toArray throws an ArrayStoreException when the given array
616	<	*  can not store the objects inside the list
615	>	* toArray throws an ArrayStoreException when the given array
616	>	* can not store the objects inside the list
617		*/
618		public void testToArray_ArrayStoreException() {
619	<	try {
620	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
621	<	c.add("zfasdfsdf");
622	<	c.add("asdadasd");
623	<	c.toArray(new Long[5]);
624	<	shouldThrow();
625	<	} catch(ArrayStoreException e){}
626	<	}
627	<
628	<	/**
629	<	*   get throws an IndexOutOfBoundsException on a negative index
630	<	*/
631	<	public void testGet1_IndexOutOfBoundsException() {
632	<	try {
633	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
634	<	c.get(-1);
635	<	shouldThrow();
636	<	} catch(IndexOutOfBoundsException e){}
637	<	}
638	<
639	<	/**
640	<	*   get throws an IndexOutOfBoundsException on a too high index
641	<	*/
642	<	public void testGet2_IndexOutOfBoundsException() {
643	<	try {
644	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
645	<	c.add("asdasd");
646	<	c.add("asdad");
647	<	c.get(100);
648	<	shouldThrow();
649	<	} catch(IndexOutOfBoundsException e){}
650	<	}
651	<
652	<	/**
653	<	*   set throws an IndexOutOfBoundsException on a negative index
654	<	*/
655	<	public void testSet1_IndexOutOfBoundsException() {
656	<	try {
657	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
658	<	c.set(-1,"qwerty");
659	<	shouldThrow();
660	<	} catch(IndexOutOfBoundsException e){}
661	<	}
662	<
663	<	/**
664	<	*   set throws an IndexOutOfBoundsException on a too high index
665	<	*/
666	<	public void testSet2() {
667	<	try {
668	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
669	<	c.add("asdasd");
670	<	c.add("asdad");
671	<	c.set(100, "qwerty");
672	<	shouldThrow();
673	<	} catch(IndexOutOfBoundsException e){}
674	<	}
675	<
676	<	/**
677	<	*   add throws an IndexOutOfBoundsException on a negative index
678	<	*/
679	<	public void testAdd1_IndexOutOfBoundsException() {
680	<	try {
681	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
682	<	c.add(-1,"qwerty");
683	<	shouldThrow();
684	<	} catch(IndexOutOfBoundsException e){}
685	<	}
686	<
687	<	/**
688	<	*   add throws an IndexOutOfBoundsException on a too high index
689	<	*/
690	<	public void testAdd2_IndexOutOfBoundsException() {
691	<	try {
692	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
693	<	c.add("asdasd");
694	<	c.add("asdasdasd");
695	<	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();
619	>	List list = new CopyOnWriteArrayList();
620	>	// Integers are not auto-converted to Longs
621	>	list.add(86);
622	>	list.add(99);
623	>	assertThrows(
624	>	ArrayStoreException.class,
625	>	() -> list.toArray(new Long[0]),
626	>	() -> list.toArray(new Long[5]));
627	>	}
628	>
629	>	void testIndexOutOfBoundsException(List list) {
630	>	int size = list.size();
631	>	assertThrows(
632	>	IndexOutOfBoundsException.class,
633	>	() -> list.get(-1),
634	>	() -> list.get(size),
635	>	() -> list.set(-1, "qwerty"),
636	>	() -> list.set(size, "qwerty"),
637	>	() -> list.add(-1, "qwerty"),
638	>	() -> list.add(size + 1, "qwerty"),
639	>	() -> list.remove(-1),
640	>	() -> list.remove(size),
641	>	() -> list.addAll(-1, Collections.emptyList()),
642	>	() -> list.addAll(size + 1, Collections.emptyList()),
643	>	() -> list.listIterator(-1),
644	>	() -> list.listIterator(size + 1),
645	>	() -> list.subList(-1, size),
646	>	() -> list.subList(0, size + 1));
647	>
648	>	// Conversely, operations that must not throw
649	>	list.addAll(0, Collections.emptyList());
650	>	list.addAll(size, Collections.emptyList());
651	>	list.add(0, "qwerty");
652	>	list.add(list.size(), "qwerty");
653	>	list.get(0);
654	>	list.get(list.size() - 1);
655	>	list.set(0, "azerty");
656	>	list.set(list.size() - 1, "azerty");
657	>	list.listIterator(0);
658	>	list.listIterator(list.size());
659	>	list.subList(0, list.size());
660	>	list.remove(list.size() - 1);
661	>	}
662	>
663	>	/**
664	>	* IndexOutOfBoundsException is thrown when specified
665	>	*/
666	>	public void testIndexOutOfBoundsException() {
667	>	ThreadLocalRandom rnd = ThreadLocalRandom.current();
668	>	List x = populatedList(rnd.nextInt(5));
669	>	testIndexOutOfBoundsException(x);
670	>
671	>	int start = rnd.nextInt(x.size() + 1);
672	>	int end = rnd.nextInt(start, x.size() + 1);
673	>	assertThrows(
674	>	IndexOutOfBoundsException.class,
675	>	() -> x.subList(start, start - 1));
676	>	List subList = x.subList(start, end);
677	>	testIndexOutOfBoundsException(x);
678	>	}
679	>
680	>	/**
681	>	* a deserialized/reserialized list equals original
682	>	*/
683	>	public void testSerialization() throws Exception {
684	>	List x = populatedList(SIZE);
685	>	List y = serialClone(x);
686	>
687	>	assertNotSame(x, y);
688	>	assertEquals(x.size(), y.size());
689	>	assertEquals(x.toString(), y.toString());
690	>	assertTrue(Arrays.equals(x.toArray(), y.toArray()));
691	>	assertEquals(x, y);
692	>	assertEquals(y, x);
693	>	while (!x.isEmpty()) {
694	>	assertFalse(y.isEmpty());
695	>	assertEquals(x.remove(0), y.remove(0));
696		}
697	+	assertTrue(y.isEmpty());
698		}
699	<
699	>
700		}

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