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Comparing jsr166/src/test/tck/CopyOnWriteArrayListTest.java (file contents):
Revision 1.1 by dl, Sun Aug 31 19:24:54 2003 UTC vs.
Revision 1.49 by jsr166, Tue Apr 3 05:49:43 2018 UTC

#	Line 1 | Line 1
1		/*
2	<	* Written by members of JCP JSR-166 Expert Group and released to the
3	<	* public domain. Use, modify, and redistribute this code in any way
4	<	* without acknowledgement. Other contributors include Andrew Wright,
5	<	* Jeffrey Hayes, Pat Fischer, Mike Judd.
2	>	* Written by Doug Lea with assistance from members of JCP JSR-166
3	>	* Expert Group and released to the public domain, as explained at
4	>	* http://creativecommons.org/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.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
12	–	public class CopyOnWriteArrayListTest extends TestCase{
13	–
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);
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 fullArray(int n){
53	<	CopyOnWriteArrayList a = new CopyOnWriteArrayList();
54	<	assertTrue(a.isEmpty());
55	<	for (int i = 0; i < n; ++i)
56	<	a.add(new Integer(i));
57	<	assertFalse(a.isEmpty());
58	<	assertEquals(n, a.size());
59	<	return a;
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	<	/**
63	<	*  Test to verify addAll correctly adds each element from the given collection
64	<	*/
65	<	public void testAddAll(){
66	<	CopyOnWriteArrayList full = fullArray(3);
67	<	Vector v = new Vector();
68	<	v.add(new Integer(3));
69	<	v.add(new Integer(4));
40	<	v.add(new Integer(5));
41	<	full.addAll(v);
42	<	assertEquals(6, full.size());
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
72		/**
73	<	*  Test to verify addAllAbsent adds each element from the given collection that did not
47	<	*  already exist in the List
73	>	* a new list is empty
74		*/
75	<	public void testAddAllAbsent(){
76	<	CopyOnWriteArrayList full = fullArray(3);
77	<	Vector v = new Vector();
52	<	v.add(new Integer(3));
53	<	v.add(new Integer(4));
54	<	v.add(new Integer(1)); // will not add this element
55	<	full.addAllAbsent(v);
56	<	assertEquals(5, full.size());
75	>	public void testConstructor() {
76	>	List list = new CopyOnWriteArrayList();
77	>	assertTrue(list.isEmpty());
78		}
79
80		/**
81	<	*  Test to verify addIfAbsent will not add the element if it already exists in the list
81	>	* new list contains all elements of initializing array
82		*/
83	<	public void testAddIfAbsent(){
84	<	CopyOnWriteArrayList full = fullArray(3);
85	<	full.addIfAbsent(new Integer(1));
86	<	assertEquals(3, full.size());
83	>	public void testConstructor2() {
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	<	*  test to verify addIfAbsent correctly adds the element when it does not exist in the list
93	>	* new list contains all elements of initializing collection
94		*/
95	<	public void testAddIfAbsent2(){
96	<	CopyOnWriteArrayList full = fullArray(3);
97	<	full.addIfAbsent(new Integer(3));
98	<	assertTrue(full.contains(new Integer(3)));
95	>	public void testConstructor3() {
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		}
103
104		/**
105	<	*  Test to verify clear correctly removes all elements from the list
105	>	* addAll adds each element from the given collection, including duplicates
106		*/
107	<	public void testClear(){
108	<	CopyOnWriteArrayList full = fullArray(3);
109	<	full.clear();
110	<	assertEquals(0, full.size());
107	>	public void testAddAll() {
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	<	*  Test to verify contains returns the correct values
116	>	* addAllAbsent adds each element from the given collection that did not
117	>	* already exist in the List
118		*/
119	<	public void testContains(){
120	<	CopyOnWriteArrayList full = fullArray(3);
121	<	assertTrue(full.contains(new Integer(1)));
122	<	assertFalse(full.contains(new Integer(5)));
119	>	public void testAddAllAbsent() {
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
95	–	public void testAddIndex() {
96	–	CopyOnWriteArrayList full = fullArray(3);
97	–	full.add(0, new Integer(-1));
98	–	assertEquals(4, full.size());
99	–	assertEquals(new Integer(-1), full.get(0));
100	–	assertEquals(new Integer(0), full.get(1));
101	–
102	–	full.add(2, new Integer(-2));
103	–	assertEquals(5, full.size());
104	–	assertEquals(new Integer(-2), full.get(2));
105	–	assertEquals(new Integer(2), full.get(4));
106	–	}
107	–
108	–	public void testEquals() {
109	–	CopyOnWriteArrayList a = fullArray(3);
110	–	CopyOnWriteArrayList b = fullArray(3);
111	–	assertTrue(a.equals(b));
112	–	assertTrue(b.equals(a));
113	–	assertEquals(a.hashCode(), b.hashCode());
114	–	a.add(new Integer(-1));
115	–	assertFalse(a.equals(b));
116	–	assertFalse(b.equals(a));
117	–	b.add(new Integer(-1));
118	–	assertTrue(a.equals(b));
119	–	assertTrue(b.equals(a));
120	–	assertEquals(a.hashCode(), b.hashCode());
121	–	}
122	–
123	–
128		/**
129	<	*  Test to verify containsAll returns the correct values
129	>	* addIfAbsent will not add the element if it already exists in the list
130		*/
131	<	public void testContainsAll(){
132	<	CopyOnWriteArrayList full = fullArray(3);
133	<	Vector v = new Vector();
134	<	v.add(new Integer(1));
131	<	v.add(new Integer(2));
132	<	assertTrue(full.containsAll(v));
133	<	v.add(new Integer(6));
134	<	assertFalse(full.containsAll(v));
131	>	public void testAddIfAbsent() {
132	>	CopyOnWriteArrayList list = populatedList(SIZE);
133	>	list.addIfAbsent(one);
134	>	assertEquals(SIZE, list.size());
135		}
136
137		/**
138	<	*  Test to verify get returns the correct value for the given index
138	>	* addIfAbsent adds the element when it does not exist in the list
139		*/
140	<	public void testGet(){
141	<	CopyOnWriteArrayList full = fullArray(3);
142	<	assertEquals(0, ((Integer)full.get(0)).intValue());
140	>	public void testAddIfAbsent2() {
141	>	CopyOnWriteArrayList list = populatedList(SIZE);
142	>	list.addIfAbsent(three);
143	>	assertTrue(list.contains(three));
144		}
145
146		/**
147	<	*  Test to verify indexOf gives the correct index for the given object
147	>	* clear removes all elements from the list
148		*/
149	<	public void testIndexOf(){
150	<	CopyOnWriteArrayList full = fullArray(3);
151	<	assertEquals(1, full.indexOf(new Integer(1)));
152	<	assertEquals(-1, full.indexOf("puppies"));
149	>	public void testClear() {
150	>	List list = populatedList(SIZE);
151	>	list.clear();
152	>	assertEquals(0, list.size());
153		}
154
155		/**
156	<	*  Test to verify indexOf gives the correct index based on the given index
156	<	*  at which to start searching
156	>	* Cloned list is equal
157		*/
158	<	public void testIndexOf2(){
159	<	CopyOnWriteArrayList full = fullArray(3);
160	<	assertEquals(1, full.indexOf(new Integer(1), 0));
161	<	assertEquals(-1, full.indexOf(new Integer(1), 2));
158	>	public void testClone() {
159	>	CopyOnWriteArrayList l1 = populatedList(SIZE);
160	>	CopyOnWriteArrayList l2 = (CopyOnWriteArrayList)(l1.clone());
161	>	assertEquals(l1, l2);
162	>	l1.clear();
163	>	assertFalse(l1.equals(l2));
164		}
165
166		/**
167	<	*  Test to verify isEmpty returns the correct values
167	>	* contains is true for added elements
168		*/
169	<	public void testIsEmpty(){
170	<	CopyOnWriteArrayList empty = new CopyOnWriteArrayList();
171	<	CopyOnWriteArrayList full = fullArray(3);
172	<	assertTrue(empty.isEmpty());
171	<	assertFalse(full.isEmpty());
169	>	public void testContains() {
170	>	List list = populatedList(3);
171	>	assertTrue(list.contains(one));
172	>	assertFalse(list.contains(five));
173		}
174
175		/**
176	<	*  Test to verify iterator() returns an iterator containing the elements of the list
176	>	* adding at an index places it in the indicated index
177		*/
178	<	public void testIterator(){
179	<	CopyOnWriteArrayList full = fullArray(3);
180	<	Iterator i = full.iterator();
181	<	int j;
182	<	for(j = 0; i.hasNext(); j++)
183	<	assertEquals(j, ((Integer)i.next()).intValue());
183	<	assertEquals(3, j);
184	<	}
178	>	public void testAddIndex() {
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	<	public void testIteratorRemove () {
186	<	CopyOnWriteArrayList full = fullArray(3);
187	<	Iterator it = full.iterator();
188	<	it.next();
190	<	try {
191	<	it.remove();
192	<	fail("should throw");
193	<	}
194	<	catch (UnsupportedOperationException success) {}
185	>	list.add(2, m2);
186	>	assertEquals(5, list.size());
187	>	assertEquals(m2, list.get(2));
188	>	assertEquals(two, list.get(4));
189		}
190
197	–	public void testToString(){
198	–	CopyOnWriteArrayList full = fullArray(3);
199	–	String s = full.toString();
200	–	for (int i = 0; i < 3; ++i) {
201	–	assertTrue(s.indexOf(String.valueOf(i)) >= 0);
202	–	}
203	–	}
204	–
191		/**
192	<	*  Test to verify lastIndexOf returns the correct index for the given object
192	>	* lists with same elements are equal and have same hashCode
193		*/
194	<	public void testLastIndexOf1(){
195	<	CopyOnWriteArrayList full = fullArray(3);
196	<	full.add(new Integer(1));
197	<	full.add(new Integer(3));
198	<	assertEquals(3, full.lastIndexOf(new Integer(1)));
199	<	assertEquals(-1, full.lastIndexOf(new Integer(6)));
200	<	}
194	>	public void testEquals() {
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	<	/**
217	<	*  Test to verify lastIndexOf returns the correct index from the given starting point
218	<	*/
219	<	public void testlastIndexOf2(){
220	<	CopyOnWriteArrayList full = fullArray(3);
221	<	full.add(new Integer(1));
222	<	full.add(new Integer(3));
223	<	assertEquals(3, full.lastIndexOf(new Integer(1), 4));
224	<	assertEquals(-1, full.lastIndexOf(new Integer(3), 3));
214	>	assertFalse(a.equals(null));
215		}
216
217		/**
218	<	*  Identical to testIterator, except ListInterator has more functionality
218	>	* containsAll returns true for collections with subset of elements
219		*/
220	<	public void testListIterator1(){
221	<	CopyOnWriteArrayList full = fullArray(3);
222	<	ListIterator i = full.listIterator();
223	<	int j;
224	<	for(j = 0; i.hasNext(); j++)
225	<	assertEquals(j, ((Integer)i.next()).intValue());
226	<	assertEquals(3, j);
237	<	}
220	>	public void testContainsAll() {
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	<	/**
229	<	*  Identical to testIterator and testListIterator1, but only returns those elements
230	<	*  after the given index
231	<	*/
243	<	public void testListIterator2(){
244	<	CopyOnWriteArrayList full = fullArray(3);
245	<	ListIterator i = full.listIterator(1);
246	<	int j;
247	<	for(j = 0; i.hasNext(); j++)
248	<	assertEquals(j+1, ((Integer)i.next()).intValue());
249	<	assertEquals(2, j);
228	>	try {
229	>	list.containsAll(null);
230	>	shouldThrow();
231	>	} catch (NullPointerException success) {}
232		}
233
234		/**
235	<	*  Test to verify remove correctly removes and returns the object at the given index
235	>	* get returns the value at the given index
236		*/
237	<	public void testRemove(){
238	<	CopyOnWriteArrayList full = fullArray(3);
239	<	assertEquals(new Integer(2), full.remove(2));
258	<	assertEquals(2, full.size());
237	>	public void testGet() {
238	>	List list = populatedList(3);
239	>	assertEquals(0, list.get(0));
240		}
241
242		/**
243	<	*  Test to verify removeAll correctly removes all elements from the given collection
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 testRemoveAll(){
248	<	CopyOnWriteArrayList full = fullArray(3);
249	<	Vector v = new Vector();
250	<	v.add(new Integer(1));
251	<	v.add(new Integer(2));
252	<	full.removeAll(v);
253	<	assertEquals(1, full.size());
254	<	}
247	>	public void testIndexOf() {
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	<	/**
261	<	*  Test to verify set correctly changes the element at the given index
262	<	*/
263	<	public void testSet(){
264	<	CopyOnWriteArrayList full = fullArray(3);
265	<	assertEquals(new Integer(2), full.set(2, new Integer(4)));
266	<	assertEquals(4, ((Integer)full.get(2)).intValue());
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	<	*  Test to verify size returns the correct values
271	<	*/
272	<	public void testSize(){
273	<	CopyOnWriteArrayList empty = new CopyOnWriteArrayList();
274	<	CopyOnWriteArrayList full = fullArray(3);
275	<	assertEquals(3, full.size());
276	<	assertEquals(0, empty.size());
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 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	<	*  Test to verify toArray returns an Object array containing all elements from the list
302	>	* isEmpty returns true when empty, else false
303		*/
304	<	public void testToArray(){
305	<	CopyOnWriteArrayList full = fullArray(3);
306	<	Object[] o = full.toArray();
307	<	assertEquals(3, o.length);
308	<	assertEquals(0, ((Integer)o[0]).intValue());
309	<	assertEquals(1, ((Integer)o[1]).intValue());
310	<	assertEquals(2, ((Integer)o[2]).intValue());
304	>	public void testIsEmpty() {
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	<	*  test to verify toArray returns an Integer array containing all elements from the list
316	>	* iterator() returns an iterator containing the elements of the
317	>	* list in insertion order
318		*/
319	<	public void testToArray2(){
320	<	CopyOnWriteArrayList full = fullArray(3);
321	<	Integer[] i = new Integer[3];
322	<	i = (Integer[])full.toArray(i);
323	<	assertEquals(3, i.length);
324	<	assertEquals(0, i[0].intValue());
325	<	assertEquals(1, i[1].intValue());
326	<	assertEquals(2, i[2].intValue());
327	<	}
328	<
319	>	public void testIterator() {
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	<	public void testSubList() {
334	<	CopyOnWriteArrayList a = fullArray(10);
335	<	assertTrue(a.subList(1,1).isEmpty());
336	<	for(int j = 0; j < 9; ++j) {
337	<	for(int i = j ; i < 10; ++i) {
338	<	List b = a.subList(j,i);
324	<	for(int k = j; k < i; ++k) {
325	<	assertEquals(new Integer(k), b.get(k-j));
326	<	}
327	<	}
328	<	}
329	<
330	<	Integer m1 = new Integer(-1);
331	<	List s = a.subList(2, 5);
332	<	assertEquals(s.size(), 3);
333	<	s.set(2, new Integer(m1));
334	<	assertEquals(a.get(4), m1);
335	<	s.clear();
336	<	assertEquals(a.size(), 7);
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
339	–	// Exception tests
340	–
341		/**
342	<	*  Test to verify toArray throws an ArrayStoreException when the given array
343	<	*  can not store the objects inside the list
342	>	* iterator of empty collection has no elements
343		*/
344	<	public void testToArray_ArrayStoreException(){
345	<	try{
346	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
348	<	c.add("zfasdfsdf");
349	<	c.add("asdadasd");
350	<	c.toArray(new Long[5]);
351	<	fail("Object[] toArray(Object[]) should throw ArrayStoreException");
352	<	}catch(ArrayStoreException e){}
344	>	public void testEmptyIterator() {
345	>	Collection c = new CopyOnWriteArrayList();
346	>	assertIteratorExhausted(c.iterator());
347		}
348
349		/**
350	<	*  Test to verify get throws an IndexOutOfBoundsException on a negative index
350	>	* iterator.remove throws UnsupportedOperationException
351		*/
352	<	public void testGet1_IndexOutOfBoundsException(){
353	<	try{
354	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
355	<	c.get(-1);
356	<	fail("Object get(int) should throw IndexOutOfBounds exception");
357	<	}catch(IndexOutOfBoundsException e){}
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	>	} catch (UnsupportedOperationException success) {}
360		}
361	<
361	>
362		/**
363	<	*  Test to verify get throws an IndexOutOfBoundsException on a too high index
363	>	* toString contains toString of elements
364		*/
365	<	public void testGet2_IndexOutOfBoundsException(){
366	<	try{
367	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
368	<	c.add("asdasd");
369	<	c.add("asdad");
370	<	c.get(100);
371	<	fail("Object get(int) should throw IndexOutOfBounds exception");
372	<	}catch(IndexOutOfBoundsException e){}
365	>	public void testToString() {
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	<	*  Test to verify set throws an IndexOutOfBoundsException on a negative index
377	<	*/
378	<	public void testSet1_IndexOutOfBoundsException(){
379	<	try{
380	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
381	<	c.set(-1,"qwerty");
382	<	fail("Object get(int, Object) should throw IndexOutOfBounds exception");
383	<	}catch(IndexOutOfBoundsException e){}
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	>	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	<
400	>
401		/**
402	<	*  Test to verify set throws an IndexOutOfBoundsException on a too high index
403	<	*/
404	<	public void testSet2(){
405	<	try{
406	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
407	<	c.add("asdasd");
408	<	c.add("asdad");
409	<	c.set(100, "qwerty");
410	<	fail("Object set(int, Object) should throw IndexOutOfBounds exception");
411	<	}catch(IndexOutOfBoundsException e){}
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	<	*  Test to verify add throws an IndexOutOfBoundsException on a negative index
434	>	* listIterator traverses all elements
435		*/
436	<	public void testAdd1_IndexOutOfBoundsException(){
437	<	try{
438	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
439	<	c.add(-1,"qwerty");
440	<	fail("void add(int, Object) should throw IndexOutOfBounds exception");
441	<	}catch(IndexOutOfBoundsException e){}
436	>	public void testListIterator1() {
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	<
444	>
445		/**
446	<	*  Test to verify add throws an IndexOutOfBoundsException on a too high index
446	>	* listIterator only returns those elements after the given index
447		*/
448	<	public void testAdd2_IndexOutOfBoundsException(){
449	<	try{
450	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
451	<	c.add("asdasd");
452	<	c.add("asdasdasd");
453	<	c.add(100, "qwerty");
454	<	fail("void add(int, Object) should throw IndexOutOfBounds exception");
424	<	}catch(IndexOutOfBoundsException e){}
448	>	public void testListIterator2() {
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	<	*  Test to verify remove throws an IndexOutOfBoundsException on a negative index
458	>	* remove(int) removes and returns the object at the given index
459		*/
460	<	public void testRemove1_IndexOutOfBounds(){
461	<	try{
462	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
463	<	c.remove(-1);
464	<	fail("Object remove(int) should throw IndexOutOfBounds exception");
465	<	}catch(IndexOutOfBoundsException e){}
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	<	*  Test to verify remove throws an IndexOutOfBoundsException on a too high index
471	>	* remove(Object) removes the object if found and returns true
472		*/
473	<	public void testRemove2_IndexOutOfBounds(){
474	<	try{
475	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
476	<	c.add("asdasd");
477	<	c.add("adasdasd");
478	<	c.remove(100);
479	<	fail("Object remove(int) should throw IndexOutOfBounds exception");
480	<	}catch(IndexOutOfBoundsException e){}
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	<
491	>
492		/**
493	<	*  Test to verify addAll throws an IndexOutOfBoundsException on a negative index
493	>	* removeAll removes all elements from the given collection
494		*/
495	<	public void testAddAll1_IndexOutOfBoundsException(){
496	<	try{
497	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
498	<	c.addAll(-1,new LinkedList());
499	<	fail("boolean add(int, Collection) should throw IndexOutOfBounds exception");
500	<	}catch(IndexOutOfBoundsException e){}
495	>	public void testRemoveAll() {
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	<
502	>
503		/**
504	<	*  Test to verify addAll throws an IndexOutOfBoundsException on a too high index
504	>	* set changes the element at the given index
505		*/
506	<	public void testAddAll2_IndexOutOfBoundsException(){
507	<	try{
508	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
509	<	c.add("asdasd");
469	<	c.add("asdasdasd");
470	<	c.addAll(100, new LinkedList());
471	<	fail("boolean addAll(int, Collection) should throw IndexOutOfBounds exception");
472	<	}catch(IndexOutOfBoundsException e){}
506	>	public void testSet() {
507	>	List list = populatedList(3);
508	>	assertEquals(2, list.set(2, four));
509	>	assertEquals(4, list.get(2));
510		}
511
512		/**
513	<	*  Test to verify listIterator throws an IndexOutOfBoundsException on a negative index
513	>	* size returns the number of elements
514		*/
515	<	public void testListIterator1_IndexOutOfBoundsException(){
516	<	try{
517	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
518	<	c.listIterator(-1);
519	<	fail("ListIterator listIterator(int) should throw IndexOutOfBounds exceptione");
520	<	}catch(IndexOutOfBoundsException e){}
515	>	public void testSize() {
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	<	*  Test to verify listIterator throws an IndexOutOfBoundsException on a too high index
527	>	* toArray() returns an Object array containing all elements from
528	>	* the list in insertion order
529		*/
530	<	public void testListIterator2_IndexOutOfBoundsException(){
531	<	try{
532	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
533	<	c.add("adasd");
534	<	c.add("asdasdas");
535	<	c.listIterator(100);
536	<	fail("ListIterator listIterator(int) should throw IndexOutOfBounds exception");
537	<	}catch(IndexOutOfBoundsException e){}
530	>	public void testToArray() {
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	<	*  Test to verify subList throws an IndexOutOfBoundsException on a negative index
546	>	* toArray(Integer array) returns an Integer array containing all
547	>	* elements from the list in insertion order
548		*/
549	<	public void testSubList1_IndexOutOfBoundsException(){
550	<	try{
551	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
552	<	c.subList(-1,100);
549	>	public void testToArray2() {
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	<	fail("List subList(int, int) should throw IndexOutofBounds exception");
576	<	}catch(IndexOutOfBoundsException e){}
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	<	*  Test to verify subList throws an IndexOutOfBoundsException on a too high index
590	>	* sublists contains elements at indexes offset from their base
591		*/
592	<	public void testSubList2_IndexOutOfBoundsException(){
593	<	try{
594	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
595	<	c.add("asdasd");
596	<	c.subList(1,100);
597	<	fail("List subList(int, int) should throw IndexOutofBounds exception");
598	<	}catch(IndexOutOfBoundsException e){}
592	>	public void testSubList() {
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	>	}
603	>
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(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	<	*  Test to verify subList throws IndexOutOfBoundsException when the second index
621	<	*  is lower then the first
620	>	* toArray throws an ArrayStoreException when the given array
621	>	* can not store the objects inside the list
622		*/
623	<	public void testSubList3_IndexOutOfBoundsException(){
624	<	try{
625	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
626	<	c.subList(3,1);
627	<
628	<	fail("List subList(int, int) should throw IndexOutofBounds exception");
629	<	}catch(IndexOutOfBoundsException e){}
623	>	public void testToArray_ArrayStoreException() {
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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