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Comparing jsr166/src/test/tck/CopyOnWriteArrayListTest.java (file contents):
Revision 1.2 by dl, Sun Sep 7 20:39:11 2003 UTC vs.
Revision 1.48 by jsr166, Tue Apr 3 00:58:28 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.*;
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
13	–	public class CopyOnWriteArrayListTest extends TestCase{
14	–
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	>	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 fullArray(int n){
48	<	CopyOnWriteArrayList a = new CopyOnWriteArrayList();
49	<	assertTrue(a.isEmpty());
50	<	for (int i = 0; i < n; ++i)
51	<	a.add(new Integer(i));
52	<	assertFalse(a.isEmpty());
53	<	assertEquals(n, a.size());
54	<	return a;
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	<	/**
58	<	*  Test to verify addAll correctly adds each element from the given collection
59	<	*/
60	<	public void testAddAll(){
61	<	CopyOnWriteArrayList full = fullArray(3);
62	<	Vector v = new Vector();
63	<	v.add(new Integer(3));
64	<	v.add(new Integer(4));
41	<	v.add(new Integer(5));
42	<	full.addAll(v);
43	<	assertEquals(6, full.size());
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
67		/**
68	<	*  Test to verify addAllAbsent adds each element from the given collection that did not
48	<	*  already exist in the List
68	>	* a new list is empty
69		*/
70	<	public void testAddAllAbsent(){
71	<	CopyOnWriteArrayList full = fullArray(3);
72	<	Vector v = new Vector();
53	<	v.add(new Integer(3));
54	<	v.add(new Integer(4));
55	<	v.add(new Integer(1)); // will not add this element
56	<	full.addAllAbsent(v);
57	<	assertEquals(5, full.size());
70	>	public void testConstructor() {
71	>	List list = new CopyOnWriteArrayList();
72	>	assertTrue(list.isEmpty());
73		}
74
75		/**
76	<	*  Test to verify addIfAbsent will not add the element if it already exists in the list
76	>	* new list contains all elements of initializing array
77		*/
78	<	public void testAddIfAbsent(){
79	<	CopyOnWriteArrayList full = fullArray(3);
80	<	full.addIfAbsent(new Integer(1));
81	<	assertEquals(3, full.size());
78	>	public void testConstructor2() {
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	<	*  test to verify addIfAbsent correctly adds the element when it does not exist in the list
88	>	* new list contains all elements of initializing collection
89		*/
90	<	public void testAddIfAbsent2(){
91	<	CopyOnWriteArrayList full = fullArray(3);
92	<	full.addIfAbsent(new Integer(3));
93	<	assertTrue(full.contains(new Integer(3)));
90	>	public void testConstructor3() {
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		}
98
99		/**
100	<	*  Test to verify clear correctly removes all elements from the list
100	>	* addAll adds each element from the given collection, including duplicates
101		*/
102	<	public void testClear(){
103	<	CopyOnWriteArrayList full = fullArray(3);
104	<	full.clear();
105	<	assertEquals(0, full.size());
102	>	public void testAddAll() {
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	<	*  Test to verify contains returns the correct values
111	>	* addAllAbsent adds each element from the given collection that did not
112	>	* already exist in the List
113		*/
114	<	public void testContains(){
115	<	CopyOnWriteArrayList full = fullArray(3);
116	<	assertTrue(full.contains(new Integer(1)));
117	<	assertFalse(full.contains(new Integer(5)));
114	>	public void testAddAllAbsent() {
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
96	–	public void testAddIndex() {
97	–	CopyOnWriteArrayList full = fullArray(3);
98	–	full.add(0, new Integer(-1));
99	–	assertEquals(4, full.size());
100	–	assertEquals(new Integer(-1), full.get(0));
101	–	assertEquals(new Integer(0), full.get(1));
102	–
103	–	full.add(2, new Integer(-2));
104	–	assertEquals(5, full.size());
105	–	assertEquals(new Integer(-2), full.get(2));
106	–	assertEquals(new Integer(2), full.get(4));
107	–	}
108	–
109	–	public void testEquals() {
110	–	CopyOnWriteArrayList a = fullArray(3);
111	–	CopyOnWriteArrayList b = fullArray(3);
112	–	assertTrue(a.equals(b));
113	–	assertTrue(b.equals(a));
114	–	assertEquals(a.hashCode(), b.hashCode());
115	–	a.add(new Integer(-1));
116	–	assertFalse(a.equals(b));
117	–	assertFalse(b.equals(a));
118	–	b.add(new Integer(-1));
119	–	assertTrue(a.equals(b));
120	–	assertTrue(b.equals(a));
121	–	assertEquals(a.hashCode(), b.hashCode());
122	–	}
123	–
124	–
123		/**
124	<	*  Test to verify containsAll returns the correct values
124	>	* addIfAbsent will not add the element if it already exists in the list
125		*/
126	<	public void testContainsAll(){
127	<	CopyOnWriteArrayList full = fullArray(3);
128	<	Vector v = new Vector();
129	<	v.add(new Integer(1));
132	<	v.add(new Integer(2));
133	<	assertTrue(full.containsAll(v));
134	<	v.add(new Integer(6));
135	<	assertFalse(full.containsAll(v));
126	>	public void testAddIfAbsent() {
127	>	CopyOnWriteArrayList list = populatedList(SIZE);
128	>	list.addIfAbsent(one);
129	>	assertEquals(SIZE, list.size());
130		}
131
132		/**
133	<	*  Test to verify get returns the correct value for the given index
133	>	* addIfAbsent adds the element when it does not exist in the list
134		*/
135	<	public void testGet(){
136	<	CopyOnWriteArrayList full = fullArray(3);
137	<	assertEquals(0, ((Integer)full.get(0)).intValue());
135	>	public void testAddIfAbsent2() {
136	>	CopyOnWriteArrayList list = populatedList(SIZE);
137	>	list.addIfAbsent(three);
138	>	assertTrue(list.contains(three));
139		}
140
141		/**
142	<	*  Test to verify indexOf gives the correct index for the given object
142	>	* clear removes all elements from the list
143		*/
144	<	public void testIndexOf(){
145	<	CopyOnWriteArrayList full = fullArray(3);
146	<	assertEquals(1, full.indexOf(new Integer(1)));
147	<	assertEquals(-1, full.indexOf("puppies"));
144	>	public void testClear() {
145	>	List list = populatedList(SIZE);
146	>	list.clear();
147	>	assertEquals(0, list.size());
148		}
149
150		/**
151	<	*  Test to verify indexOf gives the correct index based on the given index
157	<	*  at which to start searching
151	>	* Cloned list is equal
152		*/
153	<	public void testIndexOf2(){
154	<	CopyOnWriteArrayList full = fullArray(3);
155	<	assertEquals(1, full.indexOf(new Integer(1), 0));
156	<	assertEquals(-1, full.indexOf(new Integer(1), 2));
153	>	public void testClone() {
154	>	CopyOnWriteArrayList l1 = populatedList(SIZE);
155	>	CopyOnWriteArrayList l2 = (CopyOnWriteArrayList)(l1.clone());
156	>	assertEquals(l1, l2);
157	>	l1.clear();
158	>	assertFalse(l1.equals(l2));
159		}
160
161		/**
162	<	*  Test to verify isEmpty returns the correct values
162	>	* contains is true for added elements
163		*/
164	<	public void testIsEmpty(){
165	<	CopyOnWriteArrayList empty = new CopyOnWriteArrayList();
166	<	CopyOnWriteArrayList full = fullArray(3);
167	<	assertTrue(empty.isEmpty());
172	<	assertFalse(full.isEmpty());
164	>	public void testContains() {
165	>	List list = populatedList(3);
166	>	assertTrue(list.contains(one));
167	>	assertFalse(list.contains(five));
168		}
169
170		/**
171	<	*  Test to verify iterator() returns an iterator containing the elements of the list
171	>	* adding at an index places it in the indicated index
172		*/
173	<	public void testIterator(){
174	<	CopyOnWriteArrayList full = fullArray(3);
175	<	Iterator i = full.iterator();
176	<	int j;
177	<	for(j = 0; i.hasNext(); j++)
178	<	assertEquals(j, ((Integer)i.next()).intValue());
184	<	assertEquals(3, j);
185	<	}
173	>	public void testAddIndex() {
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	<	public void testIteratorRemove () {
181	<	CopyOnWriteArrayList full = fullArray(3);
182	<	Iterator it = full.iterator();
183	<	it.next();
191	<	try {
192	<	it.remove();
193	<	fail("should throw");
194	<	}
195	<	catch (UnsupportedOperationException success) {}
180	>	list.add(2, m2);
181	>	assertEquals(5, list.size());
182	>	assertEquals(m2, list.get(2));
183	>	assertEquals(two, list.get(4));
184		}
185
198	–	public void testToString(){
199	–	CopyOnWriteArrayList full = fullArray(3);
200	–	String s = full.toString();
201	–	for (int i = 0; i < 3; ++i) {
202	–	assertTrue(s.indexOf(String.valueOf(i)) >= 0);
203	–	}
204	–	}
205	–
186		/**
187	<	*  Test to verify lastIndexOf returns the correct index for the given object
187	>	* lists with same elements are equal and have same hashCode
188		*/
189	<	public void testLastIndexOf1(){
190	<	CopyOnWriteArrayList full = fullArray(3);
191	<	full.add(new Integer(1));
192	<	full.add(new Integer(3));
193	<	assertEquals(3, full.lastIndexOf(new Integer(1)));
194	<	assertEquals(-1, full.lastIndexOf(new Integer(6)));
195	<	}
189	>	public void testEquals() {
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	<	/**
218	<	*  Test to verify lastIndexOf returns the correct index from the given starting point
219	<	*/
220	<	public void testlastIndexOf2(){
221	<	CopyOnWriteArrayList full = fullArray(3);
222	<	full.add(new Integer(1));
223	<	full.add(new Integer(3));
224	<	assertEquals(3, full.lastIndexOf(new Integer(1), 4));
225	<	assertEquals(-1, full.lastIndexOf(new Integer(3), 3));
209	>	assertFalse(a.equals(null));
210		}
211
212		/**
213	<	*  Identical to testIterator, except ListInterator has more functionality
213	>	* containsAll returns true for collections with subset of elements
214		*/
215	<	public void testListIterator1(){
216	<	CopyOnWriteArrayList full = fullArray(3);
217	<	ListIterator i = full.listIterator();
218	<	int j;
219	<	for(j = 0; i.hasNext(); j++)
220	<	assertEquals(j, ((Integer)i.next()).intValue());
221	<	assertEquals(3, j);
238	<	}
215	>	public void testContainsAll() {
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	<	/**
224	<	*  Identical to testIterator and testListIterator1, but only returns those elements
225	<	*  after the given index
226	<	*/
244	<	public void testListIterator2(){
245	<	CopyOnWriteArrayList full = fullArray(3);
246	<	ListIterator i = full.listIterator(1);
247	<	int j;
248	<	for(j = 0; i.hasNext(); j++)
249	<	assertEquals(j+1, ((Integer)i.next()).intValue());
250	<	assertEquals(2, j);
223	>	try {
224	>	list.containsAll(null);
225	>	shouldThrow();
226	>	} catch (NullPointerException success) {}
227		}
228
229		/**
230	<	*  Test to verify remove correctly removes and returns the object at the given index
230	>	* get returns the value at the given index
231		*/
232	<	public void testRemove(){
233	<	CopyOnWriteArrayList full = fullArray(3);
234	<	assertEquals(new Integer(2), full.remove(2));
259	<	assertEquals(2, full.size());
232	>	public void testGet() {
233	>	List list = populatedList(3);
234	>	assertEquals(0, list.get(0));
235		}
236
237		/**
238	<	*  Test to verify removeAll correctly removes all elements from the given collection
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 testRemoveAll(){
243	<	CopyOnWriteArrayList full = fullArray(3);
244	<	Vector v = new Vector();
245	<	v.add(new Integer(1));
246	<	v.add(new Integer(2));
247	<	full.removeAll(v);
248	<	assertEquals(1, full.size());
249	<	}
242	>	public void testIndexOf() {
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	<	/**
256	<	*  Test to verify set correctly changes the element at the given index
257	<	*/
258	<	public void testSet(){
259	<	CopyOnWriteArrayList full = fullArray(3);
260	<	assertEquals(new Integer(2), full.set(2, new Integer(4)));
261	<	assertEquals(4, ((Integer)full.get(2)).intValue());
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	<	*  Test to verify size returns the correct values
266	<	*/
267	<	public void testSize(){
268	<	CopyOnWriteArrayList empty = new CopyOnWriteArrayList();
269	<	CopyOnWriteArrayList full = fullArray(3);
270	<	assertEquals(3, full.size());
271	<	assertEquals(0, empty.size());
272	<	}
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 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	<	/**
290	<	*  Test to verify toArray returns an Object array containing all elements from the list
291	<	*/
292	<	public void testToArray(){
293	<	CopyOnWriteArrayList full = fullArray(3);
298	<	Object[] o = full.toArray();
299	<	assertEquals(3, o.length);
300	<	assertEquals(0, ((Integer)o[0]).intValue());
301	<	assertEquals(1, ((Integer)o[1]).intValue());
302	<	assertEquals(2, ((Integer)o[2]).intValue());
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	<	*  test to verify toArray returns an Integer array containing all elements from the list
297	>	* isEmpty returns true when empty, else false
298		*/
299	<	public void testToArray2(){
300	<	CopyOnWriteArrayList full = fullArray(3);
301	<	Integer[] i = new Integer[3];
302	<	i = (Integer[])full.toArray(i);
312	<	assertEquals(3, i.length);
313	<	assertEquals(0, i[0].intValue());
314	<	assertEquals(1, i[1].intValue());
315	<	assertEquals(2, i[2].intValue());
316	<	}
317	<
299	>	public void testIsEmpty() {
300	>	List empty = new CopyOnWriteArrayList();
301	>	assertTrue(empty.isEmpty());
302	>	assertTrue(empty.subList(0, 0).isEmpty());
303
304	<	public void testSubList() {
305	<	CopyOnWriteArrayList a = fullArray(10);
306	<	assertTrue(a.subList(1,1).isEmpty());
307	<	for(int j = 0; j < 9; ++j) {
323	<	for(int i = j ; i < 10; ++i) {
324	<	List b = a.subList(j,i);
325	<	for(int k = j; k < i; ++k) {
326	<	assertEquals(new Integer(k), b.get(k-j));
327	<	}
328	<	}
329	<	}
330	<
331	<	Integer m1 = new Integer(-1);
332	<	List s = a.subList(2, 5);
333	<	assertEquals(s.size(), 3);
334	<	s.set(2, new Integer(m1));
335	<	assertEquals(a.get(4), m1);
336	<	s.clear();
337	<	assertEquals(a.size(), 7);
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
340	–	// Exception tests
341	–
310		/**
311	<	*  Test to verify toArray throws an ArrayStoreException when the given array
312	<	*  can not store the objects inside the list
311	>	* iterator() returns an iterator containing the elements of the
312	>	* list in insertion order
313		*/
314	<	public void testToArray_ArrayStoreException(){
315	<	try{
316	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
317	<	c.add("zfasdfsdf");
318	<	c.add("asdadasd");
319	<	c.toArray(new Long[5]);
320	<	fail("Object[] toArray(Object[]) should throw ArrayStoreException");
321	<	}catch(ArrayStoreException e){}
314	>	public void testIterator() {
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	<	*  Test to verify get throws an IndexOutOfBoundsException on a negative index
337	>	* iterator of empty collection has no elements
338		*/
339	<	public void testGet1_IndexOutOfBoundsException(){
340	<	try{
341	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
362	<	c.get(-1);
363	<	fail("Object get(int) should throw IndexOutOfBounds exception");
364	<	}catch(IndexOutOfBoundsException e){}
339	>	public void testEmptyIterator() {
340	>	Collection c = new CopyOnWriteArrayList();
341	>	assertIteratorExhausted(c.iterator());
342		}
343	<
343	>
344		/**
345	<	*  Test to verify get throws an IndexOutOfBoundsException on a too high index
345	>	* iterator.remove throws UnsupportedOperationException
346		*/
347	<	public void testGet2_IndexOutOfBoundsException(){
348	<	try{
349	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
350	<	c.add("asdasd");
351	<	c.add("asdad");
352	<	c.get(100);
353	<	fail("Object get(int) should throw IndexOutOfBounds exception");
354	<	}catch(IndexOutOfBoundsException e){}
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	>	} catch (UnsupportedOperationException success) {}
355		}
356
357		/**
358	<	*  Test to verify set throws an IndexOutOfBoundsException on a negative index
358	>	* toString contains toString of elements
359		*/
360	<	public void testSet1_IndexOutOfBoundsException(){
361	<	try{
362	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
363	<	c.set(-1,"qwerty");
364	<	fail("Object get(int, Object) should throw IndexOutOfBounds exception");
365	<	}catch(IndexOutOfBoundsException e){}
360	>	public void testToString() {
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	<
369	>
370		/**
371	<	*  Test to verify set throws an IndexOutOfBoundsException on a too high index
372	<	*/
373	<	public void testSet2(){
374	<	try{
375	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
376	<	c.add("asdasd");
377	<	c.add("asdad");
378	<	c.set(100, "qwerty");
379	<	fail("Object set(int, Object) should throw IndexOutOfBounds exception");
380	<	}catch(IndexOutOfBoundsException e){}
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	>	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	<	*  Test to verify add throws an IndexOutOfBoundsException on a negative index
398	<	*/
399	<	public void testAdd1_IndexOutOfBoundsException(){
400	<	try{
401	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
402	<	c.add(-1,"qwerty");
403	<	fail("void add(int, Object) should throw IndexOutOfBounds exception");
404	<	}catch(IndexOutOfBoundsException e){}
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	<
427	>
428		/**
429	<	*  Test to verify add throws an IndexOutOfBoundsException on a too high index
429	>	* listIterator traverses all elements
430		*/
431	<	public void testAdd2_IndexOutOfBoundsException(){
432	<	try{
433	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
434	<	c.add("asdasd");
435	<	c.add("asdasdasd");
436	<	c.add(100, "qwerty");
437	<	fail("void add(int, Object) should throw IndexOutOfBounds exception");
425	<	}catch(IndexOutOfBoundsException e){}
431	>	public void testListIterator1() {
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	<	*  Test to verify remove throws an IndexOutOfBoundsException on a negative index
441	>	* listIterator only returns those elements after the given index
442		*/
443	<	public void testRemove1_IndexOutOfBounds(){
444	<	try{
445	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
446	<	c.remove(-1);
447	<	fail("Object remove(int) should throw IndexOutOfBounds exception");
448	<	}catch(IndexOutOfBoundsException e){}
443	>	public void testListIterator2() {
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	<	*  Test to verify remove throws an IndexOutOfBoundsException on a too high index
453	>	* remove(int) removes and returns the object at the given index
454		*/
455	<	public void testRemove2_IndexOutOfBounds(){
456	<	try{
457	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
458	<	c.add("asdasd");
459	<	c.add("adasdasd");
460	<	c.remove(100);
461	<	fail("Object remove(int) should throw IndexOutOfBounds exception");
462	<	}catch(IndexOutOfBoundsException e){}
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	<
464	>
465		/**
466	<	*  Test to verify addAll throws an IndexOutOfBoundsException on a negative index
466	>	* remove(Object) removes the object if found and returns true
467		*/
468	<	public void testAddAll1_IndexOutOfBoundsException(){
469	<	try{
470	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
471	<	c.addAll(-1,new LinkedList());
472	<	fail("boolean add(int, Collection) should throw IndexOutOfBounds exception");
473	<	}catch(IndexOutOfBoundsException e){}
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	<
486	>
487		/**
488	<	*  Test to verify addAll throws an IndexOutOfBoundsException on a too high index
488	>	* removeAll removes all elements from the given collection
489		*/
490	<	public void testAddAll2_IndexOutOfBoundsException(){
491	<	try{
492	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
493	<	c.add("asdasd");
494	<	c.add("asdasdasd");
495	<	c.addAll(100, new LinkedList());
472	<	fail("boolean addAll(int, Collection) should throw IndexOutOfBounds exception");
473	<	}catch(IndexOutOfBoundsException e){}
490	>	public void testRemoveAll() {
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	<	*  Test to verify listIterator throws an IndexOutOfBoundsException on a negative index
499	>	* set changes the element at the given index
500		*/
501	<	public void testListIterator1_IndexOutOfBoundsException(){
502	<	try{
503	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
504	<	c.listIterator(-1);
483	<	fail("ListIterator listIterator(int) should throw IndexOutOfBounds exceptione");
484	<	}catch(IndexOutOfBoundsException e){}
501	>	public void testSet() {
502	>	List list = populatedList(3);
503	>	assertEquals(2, list.set(2, four));
504	>	assertEquals(4, list.get(2));
505		}
506
507		/**
508	<	*  Test to verify listIterator throws an IndexOutOfBoundsException on a too high index
508	>	* size returns the number of elements
509		*/
510	<	public void testListIterator2_IndexOutOfBoundsException(){
511	<	try{
512	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
513	<	c.add("adasd");
514	<	c.add("asdasdas");
515	<	c.listIterator(100);
516	<	fail("ListIterator listIterator(int) should throw IndexOutOfBounds exception");
517	<	}catch(IndexOutOfBoundsException e){}
510	>	public void testSize() {
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	<	*  Test to verify subList throws an IndexOutOfBoundsException on a negative index
522	>	* toArray() returns an Object array containing all elements from
523	>	* the list in insertion order
524		*/
525	<	public void testSubList1_IndexOutOfBoundsException(){
526	<	try{
527	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
528	<	c.subList(-1,100);
525	>	public void testToArray() {
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	<	fail("List subList(int, int) should throw IndexOutofBounds exception");
537	<	}catch(IndexOutOfBoundsException e){}
536	>	assertTrue(Arrays.equals(elements, full.toArray()));
537	>	assertSame(Object[].class, full.toArray().getClass());
538		}
539
540		/**
541	<	*  Test to verify subList throws an IndexOutOfBoundsException on a too high index
541	>	* toArray(Integer array) returns an Integer array containing all
542	>	* elements from the list in insertion order
543		*/
544	<	public void testSubList2_IndexOutOfBoundsException(){
545	<	try{
546	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
547	<	c.add("asdasd");
548	<	c.subList(1,100);
549	<	fail("List subList(int, int) should throw IndexOutofBounds exception");
550	<	}catch(IndexOutOfBoundsException e){}
544	>	public void testToArray2() {
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	<	*  Test to verify subList throws IndexOutOfBoundsException when the second index
526	<	*  is lower then the first
585	>	* sublists contains elements at indexes offset from their base
586		*/
587	<	public void testSubList3_IndexOutOfBoundsException(){
588	<	try{
589	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
590	<	c.subList(3,1);
587	>	public void testSubList() {
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	>	}
598	>
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(7, a.size());
605
606	<	fail("List subList(int, int) should throw IndexOutofBounds exception");
607	<	}catch(IndexOutOfBoundsException e){}
606	>	assertThrows(
607	>	IndexOutOfBoundsException.class,
608	>	() -> s.get(0),
609	>	() -> s.set(0, 42));
610		}
611
612	<	public void testSerialization() {
538	<	CopyOnWriteArrayList q = fullArray(10);
612	>	// Exception tests
613
614	<	try {
615	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
616	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
617	<	out.writeObject(q);
618	<	out.close();
619	<
620	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
621	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
622	<	CopyOnWriteArrayList r = (CopyOnWriteArrayList)in.readObject();
623	<	assertEquals(q.size(), r.size());
624	<	assertTrue(q.equals(r));
625	<	assertTrue(r.equals(q));
626	<	} catch(Exception e){
627	<	e.printStackTrace();
628	<	fail("unexpected exception");
614	>	/**
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	>	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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