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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 1.50 by dl, Tue Jan 26 13:33:05 2021 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 JSR166TestCase.itemFor(i); }
33	>	public boolean isConcurrent() { return true; }
34	>	public boolean permitsNulls() { return true; }
35	>	}
36	>	class SubListImplementation extends Implementation {
37	>	@SuppressWarnings("unchecked")
38	>	public List emptyCollection() {
39	>	List list = super.emptyCollection();
40	>	ThreadLocalRandom rnd = ThreadLocalRandom.current();
41	>	if (rnd.nextBoolean())
42	>	list.add(makeElement(rnd.nextInt()));
43	>	int i = rnd.nextInt(list.size() + 1);
44	>	return list.subList(i, i);
45	>	}
46	>	}
47	>	return newTestSuite(
48	>	CopyOnWriteArrayListTest.class,
49	>	CollectionTest.testSuite(new Implementation()),
50	>	CollectionTest.testSuite(new SubListImplementation()));
51		}
52
53	<	static CopyOnWriteArrayList fullArray(int n){
54	<	CopyOnWriteArrayList a = new CopyOnWriteArrayList();
55	<	assertTrue(a.isEmpty());
56	<	for (int i = 0; i < n; ++i)
57	<	a.add(new Integer(i));
58	<	assertFalse(a.isEmpty());
59	<	assertEquals(n, a.size());
60	<	return a;
53	>	static CopyOnWriteArrayList<Item> populatedList(int n) {
54	>	CopyOnWriteArrayList<Item> list = new CopyOnWriteArrayList<>();
55	>	assertTrue(list.isEmpty());
56	>	for (int i = 0; i < n; i++)
57	>	mustAdd(list, i);
58	>	mustEqual(n <= 0, list.isEmpty());
59	>	mustEqual(n, list.size());
60	>	return list;
61		}
62
63	<	/**
64	<	*  Test to verify addAll correctly adds each element from the given collection
65	<	*/
66	<	public void testAddAll(){
67	<	CopyOnWriteArrayList full = fullArray(3);
68	<	Vector v = new Vector();
69	<	v.add(new Integer(3));
70	<	v.add(new Integer(4));
41	<	v.add(new Integer(5));
42	<	full.addAll(v);
43	<	assertEquals(6, full.size());
63	>	static CopyOnWriteArrayList<Item> populatedList(Item[] elements) {
64	>	CopyOnWriteArrayList<Item> list = new CopyOnWriteArrayList<>();
65	>	assertTrue(list.isEmpty());
66	>	for (Item element : elements)
67	>	list.add(element);
68	>	assertFalse(list.isEmpty());
69	>	mustEqual(elements.length, list.size());
70	>	return list;
71		}
72
73		/**
74	<	*  Test to verify addAllAbsent adds each element from the given collection that did not
48	<	*  already exist in the List
74	>	* a new list is empty
75		*/
76	<	public void testAddAllAbsent(){
77	<	CopyOnWriteArrayList full = fullArray(3);
78	<	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());
76	>	public void testConstructor() {
77	>	List<Item> list = new CopyOnWriteArrayList<Item>();
78	>	assertTrue(list.isEmpty());
79		}
80
81		/**
82	<	*  Test to verify addIfAbsent will not add the element if it already exists in the list
82	>	* new list contains all elements of initializing array
83		*/
84	<	public void testAddIfAbsent(){
85	<	CopyOnWriteArrayList full = fullArray(3);
86	<	full.addIfAbsent(new Integer(1));
87	<	assertEquals(3, full.size());
84	>	public void testConstructor2() {
85	>	Item[] elts = defaultItems;
86	>	List<Item> list = new CopyOnWriteArrayList<Item>(elts);
87	>	for (int i = 0; i < SIZE; ++i)
88	>	mustEqual(elts[i], list.get(i));
89		}
90
91		/**
92	<	*  test to verify addIfAbsent correctly adds the element when it does not exist in the list
92	>	* new list contains all elements of initializing collection
93		*/
94	<	public void testAddIfAbsent2(){
95	<	CopyOnWriteArrayList full = fullArray(3);
96	<	full.addIfAbsent(new Integer(3));
97	<	assertTrue(full.contains(new Integer(3)));
94	>	public void testConstructor3() {
95	>	Item[] elts = defaultItems;
96	>	List<Item> list = new CopyOnWriteArrayList<Item>(Arrays.asList(elts));
97	>	for (int i = 0; i < SIZE; ++i)
98	>	mustEqual(elts[i], list.get(i));
99		}
100
101		/**
102	<	*  Test to verify clear correctly removes all elements from the list
102	>	* addAll adds each element from the given collection, including duplicates
103		*/
104	<	public void testClear(){
105	<	CopyOnWriteArrayList full = fullArray(3);
106	<	full.clear();
107	<	assertEquals(0, full.size());
104	>	public void testAddAll() {
105	>	List<Item> list = populatedList(3);
106	>	assertTrue(list.addAll(Arrays.asList(three, four, five)));
107	>	mustEqual(6, list.size());
108	>	assertTrue(list.addAll(Arrays.asList(three, four, five)));
109	>	mustEqual(9, list.size());
110		}
111
112		/**
113	<	*  Test to verify contains returns the correct values
113	>	* addAllAbsent adds each element from the given collection that did not
114	>	* already exist in the List
115		*/
116	<	public void testContains(){
117	<	CopyOnWriteArrayList full = fullArray(3);
118	<	assertTrue(full.contains(new Integer(1)));
119	<	assertFalse(full.contains(new Integer(5)));
120	<	}
121	<
122	<	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());
116	>	public void testAddAllAbsent() {
117	>	CopyOnWriteArrayList<Item> list = populatedList(3);
118	>	// "one" is duplicate and will not be added
119	>	mustEqual(2, list.addAllAbsent(Arrays.asList(three, four, one)));
120	>	mustEqual(5, list.size());
121	>	mustEqual(0, list.addAllAbsent(Arrays.asList(three, four, one)));
122	>	mustEqual(5, list.size());
123		}
124
124	–
125		/**
126	<	*  Test to verify containsAll returns the correct values
126	>	* addIfAbsent will not add the element if it already exists in the list
127		*/
128	<	public void testContainsAll(){
129	<	CopyOnWriteArrayList full = fullArray(3);
130	<	Vector v = new Vector();
131	<	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));
128	>	public void testAddIfAbsent() {
129	>	CopyOnWriteArrayList<Item> list = populatedList(SIZE);
130	>	list.addIfAbsent(one);
131	>	mustEqual(SIZE, list.size());
132		}
133
134		/**
135	<	*  Test to verify get returns the correct value for the given index
135	>	* addIfAbsent adds the element when it does not exist in the list
136		*/
137	<	public void testGet(){
138	<	CopyOnWriteArrayList full = fullArray(3);
139	<	assertEquals(0, ((Integer)full.get(0)).intValue());
137	>	public void testAddIfAbsent2() {
138	>	CopyOnWriteArrayList<Item> list = populatedList(SIZE);
139	>	list.addIfAbsent(three);
140	>	mustContain(list, three);
141		}
142
143		/**
144	<	*  Test to verify indexOf gives the correct index for the given object
144	>	* clear removes all elements from the list
145		*/
146	<	public void testIndexOf(){
147	<	CopyOnWriteArrayList full = fullArray(3);
148	<	assertEquals(1, full.indexOf(new Integer(1)));
149	<	assertEquals(-1, full.indexOf("puppies"));
146	>	public void testClear() {
147	>	List<Item> list = populatedList(SIZE);
148	>	list.clear();
149	>	mustEqual(0, list.size());
150		}
151
152		/**
153	<	*  Test to verify indexOf gives the correct index based on the given index
157	<	*  at which to start searching
153	>	* Cloned list is equal
154		*/
155	<	public void testIndexOf2(){
156	<	CopyOnWriteArrayList full = fullArray(3);
157	<	assertEquals(1, full.indexOf(new Integer(1), 0));
158	<	assertEquals(-1, full.indexOf(new Integer(1), 2));
155	>	public void testClone() {
156	>	CopyOnWriteArrayList<Item> l1 = populatedList(SIZE);
157	>	@SuppressWarnings("unchecked")
158	>	CopyOnWriteArrayList<Item> l2 = (CopyOnWriteArrayList<Item>)(l1.clone());
159	>	mustEqual(l1, l2);
160	>	l1.clear();
161	>	assertFalse(l1.equals(l2));
162		}
163
164		/**
165	<	*  Test to verify isEmpty returns the correct values
165	>	* contains is true for added elements
166		*/
167	<	public void testIsEmpty(){
168	<	CopyOnWriteArrayList empty = new CopyOnWriteArrayList();
169	<	CopyOnWriteArrayList full = fullArray(3);
170	<	assertTrue(empty.isEmpty());
172	<	assertFalse(full.isEmpty());
167	>	public void testContains() {
168	>	List<Item> list = populatedList(3);
169	>	mustContain(list, one);
170	>	mustNotContain(list, five);
171		}
172
173		/**
174	<	*  Test to verify iterator() returns an iterator containing the elements of the list
174	>	* adding at an index places it in the indicated index
175		*/
176	<	public void testIterator(){
177	<	CopyOnWriteArrayList full = fullArray(3);
178	<	Iterator i = full.iterator();
179	<	int j;
180	<	for(j = 0; i.hasNext(); j++)
181	<	assertEquals(j, ((Integer)i.next()).intValue());
184	<	assertEquals(3, j);
185	<	}
176	>	public void testAddIndex() {
177	>	List<Item> list = populatedList(3);
178	>	list.add(0, minusOne);
179	>	mustEqual(4, list.size());
180	>	mustEqual(minusOne, list.get(0));
181	>	mustEqual(zero, list.get(1));
182
183	<	public void testIteratorRemove () {
184	<	CopyOnWriteArrayList full = fullArray(3);
185	<	Iterator it = full.iterator();
186	<	it.next();
191	<	try {
192	<	it.remove();
193	<	fail("should throw");
194	<	}
195	<	catch (UnsupportedOperationException success) {}
183	>	list.add(2, minusTwo);
184	>	mustEqual(5, list.size());
185	>	mustEqual(minusTwo, list.get(2));
186	>	mustEqual(two, list.get(4));
187		}
188
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	–
189		/**
190	<	*  Test to verify lastIndexOf returns the correct index for the given object
190	>	* lists with same elements are equal and have same hashCode
191		*/
192	<	public void testLastIndexOf1(){
193	<	CopyOnWriteArrayList full = fullArray(3);
194	<	full.add(new Integer(1));
195	<	full.add(new Integer(3));
196	<	assertEquals(3, full.lastIndexOf(new Integer(1)));
197	<	assertEquals(-1, full.lastIndexOf(new Integer(6)));
198	<	}
192	>	public void testEquals() {
193	>	List<Item> a = populatedList(3);
194	>	List<Item> b = populatedList(3);
195	>	assertTrue(a.equals(b));
196	>	assertTrue(b.equals(a));
197	>	assertTrue(a.containsAll(b));
198	>	assertTrue(b.containsAll(a));
199	>	mustEqual(a.hashCode(), b.hashCode());
200	>	a.add(minusOne);
201	>	assertFalse(a.equals(b));
202	>	assertFalse(b.equals(a));
203	>	assertTrue(a.containsAll(b));
204	>	assertFalse(b.containsAll(a));
205	>	b.add(minusOne);
206	>	assertTrue(a.equals(b));
207	>	assertTrue(b.equals(a));
208	>	assertTrue(a.containsAll(b));
209	>	assertTrue(b.containsAll(a));
210	>	mustEqual(a.hashCode(), b.hashCode());
211
212	<	/**
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));
212	>	assertFalse(a.equals(null));
213		}
214
215		/**
216	<	*  Identical to testIterator, except ListInterator has more functionality
216	>	* containsAll returns true for collections with subset of elements
217		*/
218	<	public void testListIterator1(){
219	<	CopyOnWriteArrayList full = fullArray(3);
220	<	ListIterator i = full.listIterator();
221	<	int j;
222	<	for(j = 0; i.hasNext(); j++)
223	<	assertEquals(j, ((Integer)i.next()).intValue());
224	<	assertEquals(3, j);
238	<	}
218	>	public void testContainsAll() {
219	>	List<Item> list = populatedList(3);
220	>	assertTrue(list.containsAll(Arrays.asList()));
221	>	assertTrue(list.containsAll(Arrays.asList(one)));
222	>	assertTrue(list.containsAll(Arrays.asList(one, two)));
223	>	assertFalse(list.containsAll(Arrays.asList(one, two, six)));
224	>	assertFalse(list.containsAll(Arrays.asList(six)));
225
226	<	/**
227	<	*  Identical to testIterator and testListIterator1, but only returns those elements
228	<	*  after the given index
229	<	*/
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);
226	>	try {
227	>	list.containsAll(null);
228	>	shouldThrow();
229	>	} catch (NullPointerException success) {}
230		}
231
232		/**
233	<	*  Test to verify remove correctly removes and returns the object at the given index
233	>	* get returns the value at the given index
234		*/
235	<	public void testRemove(){
236	<	CopyOnWriteArrayList full = fullArray(3);
237	<	assertEquals(new Integer(2), full.remove(2));
259	<	assertEquals(2, full.size());
235	>	public void testGet() {
236	>	List<Item> list = populatedList(3);
237	>	mustEqual(0, list.get(0));
238		}
239
240		/**
241	<	*  Test to verify removeAll correctly removes all elements from the given collection
241	>	* indexOf(Object) returns the index of the first occurrence of the
242	>	* specified element in this list, or -1 if this list does not
243	>	* contain the element
244		*/
245	<	public void testRemoveAll(){
246	<	CopyOnWriteArrayList full = fullArray(3);
247	<	Vector v = new Vector();
248	<	v.add(new Integer(1));
249	<	v.add(new Integer(2));
250	<	full.removeAll(v);
251	<	assertEquals(1, full.size());
252	<	}
245	>	public void testIndexOf() {
246	>	List<Item> list = populatedList(3);
247	>	mustEqual(-1, list.indexOf(minusTen));
248	>	int size = list.size();
249	>	for (int i = 0; i < size; i++) {
250	>	Item I = itemFor(i);
251	>	mustEqual(i, list.indexOf(I));
252	>	mustEqual(i, list.subList(0, size).indexOf(I));
253	>	mustEqual(i, list.subList(0, i + 1).indexOf(I));
254	>	mustEqual(-1, list.subList(0, i).indexOf(I));
255	>	mustEqual(0, list.subList(i, size).indexOf(I));
256	>	mustEqual(-1, list.subList(i + 1, size).indexOf(I));
257	>	}
258
259	<	/**
260	<	*  Test to verify set correctly changes the element at the given index
261	<	*/
262	<	public void testSet(){
263	<	CopyOnWriteArrayList full = fullArray(3);
264	<	assertEquals(new Integer(2), full.set(2, new Integer(4)));
265	<	assertEquals(4, ((Integer)full.get(2)).intValue());
259	>	list.add(one);
260	>	mustEqual(1, list.indexOf(one));
261	>	mustEqual(1, list.subList(0, size + 1).indexOf(one));
262	>	mustEqual(0, list.subList(1, size + 1).indexOf(one));
263	>	mustEqual(size - 2, list.subList(2, size + 1).indexOf(one));
264	>	mustEqual(0, list.subList(size, size + 1).indexOf(one));
265	>	mustEqual(-1, list.subList(size + 1, size + 1).indexOf(one));
266		}
267
268		/**
269	<	*  Test to verify size returns the correct values
270	<	*/
271	<	public void testSize(){
272	<	CopyOnWriteArrayList empty = new CopyOnWriteArrayList();
273	<	CopyOnWriteArrayList full = fullArray(3);
274	<	assertEquals(3, full.size());
275	<	assertEquals(0, empty.size());
276	<	}
269	>	* indexOf(E, int) returns the index of the first occurrence of the
270	>	* specified element in this list, searching forwards from index,
271	>	* or returns -1 if the element is not found
272	>	*/
273	>	public void testIndexOf2() {
274	>	CopyOnWriteArrayList<Item> list = populatedList(3);
275	>	int size = list.size();
276	>	mustEqual(-1, list.indexOf(minusTen, 0));
277	>
278	>	// we might expect IOOBE, but spec says otherwise
279	>	mustEqual(-1, list.indexOf(zero, size));
280	>	mustEqual(-1, list.indexOf(zero, Integer.MAX_VALUE));
281	>
282	>	assertThrows(
283	>	IndexOutOfBoundsException.class,
284	>	() -> list.indexOf(zero, -1),
285	>	() -> list.indexOf(zero, Integer.MIN_VALUE));
286	>
287	>	for (int i = 0; i < size; i++) {
288	>	Item I = itemFor(i);
289	>	mustEqual(i, list.indexOf(I, 0));
290	>	mustEqual(i, list.indexOf(I, i));
291	>	mustEqual(-1, list.indexOf(I, i + 1));
292	>	}
293
294	<	/**
295	<	*  Test to verify toArray returns an Object array containing all elements from the list
296	<	*/
297	<	public void testToArray(){
298	<	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());
294	>	list.add(one);
295	>	mustEqual(1, list.indexOf(one, 0));
296	>	mustEqual(1, list.indexOf(one, 1));
297	>	mustEqual(size, list.indexOf(one, 2));
298	>	mustEqual(size, list.indexOf(one, size));
299		}
300
301		/**
302	<	*  test to verify toArray returns an Integer array containing all elements from the list
302	>	* isEmpty returns true when empty, else false
303		*/
304	<	public void testToArray2(){
305	<	CopyOnWriteArrayList full = fullArray(3);
306	<	Integer[] i = new Integer[3];
307	<	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	<	}
304	>	public void testIsEmpty() {
305	>	List<Item> empty = new CopyOnWriteArrayList<Item>();
306	>	assertTrue(empty.isEmpty());
307	>	assertTrue(empty.subList(0, 0).isEmpty());
308
309	<
310	<	public void testSubList() {
311	<	CopyOnWriteArrayList a = fullArray(10);
312	<	assertTrue(a.subList(1,1).isEmpty());
322	<	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);
309	>	List<Item> full = populatedList(SIZE);
310	>	assertFalse(full.isEmpty());
311	>	assertTrue(full.subList(0, 0).isEmpty());
312	>	assertTrue(full.subList(SIZE, SIZE).isEmpty());
313		}
314
340	–	// Exception tests
341	–
315		/**
316	<	*  Test to verify toArray throws an ArrayStoreException when the given array
317	<	*  can not store the objects inside the list
316	>	* iterator() returns an iterator containing the elements of the
317	>	* list in insertion order
318		*/
319	<	public void testToArray_ArrayStoreException(){
320	<	try{
321	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
322	<	c.add("zfasdfsdf");
323	<	c.add("asdadasd");
324	<	c.toArray(new Long[5]);
325	<	fail("Object[] toArray(Object[]) should throw ArrayStoreException");
326	<	}catch(ArrayStoreException e){}
319	>	public void testIterator() {
320	>	Collection<Item> empty = new CopyOnWriteArrayList<Item>();
321	>	assertFalse(empty.iterator().hasNext());
322	>	try {
323	>	empty.iterator().next();
324	>	shouldThrow();
325	>	} catch (NoSuchElementException success) {}
326	>
327	>	Item[] elements = seqItems(SIZE);
328	>	shuffle(elements);
329	>	Collection<Item> full = populatedList(elements);
330	>
331	>	Iterator<? extends Item> it = full.iterator();
332	>	for (int j = 0; j < SIZE; j++) {
333	>	assertTrue(it.hasNext());
334	>	mustEqual(elements[j], it.next());
335	>	}
336	>	assertIteratorExhausted(it);
337		}
338
339		/**
340	<	*  Test to verify get throws an IndexOutOfBoundsException on a negative index
340	>	* iterator of empty collection has no elements
341		*/
342	<	public void testGet1_IndexOutOfBoundsException(){
343	<	try{
344	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
362	<	c.get(-1);
363	<	fail("Object get(int) should throw IndexOutOfBounds exception");
364	<	}catch(IndexOutOfBoundsException e){}
342	>	public void testEmptyIterator() {
343	>	Collection<Item> c = new CopyOnWriteArrayList<Item>();
344	>	assertIteratorExhausted(c.iterator());
345		}
346	<
346	>
347		/**
348	<	*  Test to verify get throws an IndexOutOfBoundsException on a too high index
348	>	* iterator.remove throws UnsupportedOperationException
349		*/
350	<	public void testGet2_IndexOutOfBoundsException(){
351	<	try{
352	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
353	<	c.add("asdasd");
354	<	c.add("asdad");
355	<	c.get(100);
356	<	fail("Object get(int) should throw IndexOutOfBounds exception");
357	<	}catch(IndexOutOfBoundsException e){}
350	>	public void testIteratorRemove() {
351	>	CopyOnWriteArrayList<Item> list = populatedList(SIZE);
352	>	Iterator<? extends Item> it = list.iterator();
353	>	it.next();
354	>	try {
355	>	it.remove();
356	>	shouldThrow();
357	>	} catch (UnsupportedOperationException success) {}
358		}
359
360		/**
361	<	*  Test to verify set throws an IndexOutOfBoundsException on a negative index
361	>	* toString contains toString of elements
362		*/
363	<	public void testSet1_IndexOutOfBoundsException(){
364	<	try{
365	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
366	<	c.set(-1,"qwerty");
367	<	fail("Object get(int, Object) should throw IndexOutOfBounds exception");
368	<	}catch(IndexOutOfBoundsException e){}
363	>	public void testToString() {
364	>	mustEqual("[]", new CopyOnWriteArrayList<Item>().toString());
365	>	List<Item> list = populatedList(3);
366	>	String s = list.toString();
367	>	for (int i = 0; i < 3; ++i)
368	>	assertTrue(s.contains(String.valueOf(i)));
369	>	mustEqual(new ArrayList<Item>(list).toString(),
370	>	list.toString());
371		}
372	<
372	>
373		/**
374	<	*  Test to verify set throws an IndexOutOfBoundsException on a too high index
375	<	*/
376	<	public void testSet2(){
377	<	try{
378	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
379	<	c.add("asdasd");
380	<	c.add("asdad");
381	<	c.set(100, "qwerty");
382	<	fail("Object set(int, Object) should throw IndexOutOfBounds exception");
383	<	}catch(IndexOutOfBoundsException e){}
374	>	* lastIndexOf(Object) returns the index of the last occurrence of
375	>	* the specified element in this list, or -1 if this list does not
376	>	* contain the element
377	>	*/
378	>	public void testLastIndexOf1() {
379	>	List<Item> list = populatedList(3);
380	>	mustEqual(-1, list.lastIndexOf(itemFor(-42)));
381	>	int size = list.size();
382	>	for (int i = 0; i < size; i++) {
383	>	Item I = itemFor(i);
384	>	mustEqual(i, list.lastIndexOf(I));
385	>	mustEqual(i, list.subList(0, size).lastIndexOf(I));
386	>	mustEqual(i, list.subList(0, i + 1).lastIndexOf(I));
387	>	mustEqual(-1, list.subList(0, i).lastIndexOf(I));
388	>	mustEqual(0, list.subList(i, size).lastIndexOf(I));
389	>	mustEqual(-1, list.subList(i + 1, size).lastIndexOf(I));
390	>	}
391	>
392	>	list.add(one);
393	>	mustEqual(size, list.lastIndexOf(one));
394	>	mustEqual(size, list.subList(0, size + 1).lastIndexOf(one));
395	>	mustEqual(1, list.subList(0, size).lastIndexOf(one));
396	>	mustEqual(0, list.subList(1, 2).lastIndexOf(one));
397	>	mustEqual(-1, list.subList(0, 1).indexOf(one));
398		}
399
400		/**
401	<	*  Test to verify add throws an IndexOutOfBoundsException on a negative index
402	<	*/
403	<	public void testAdd1_IndexOutOfBoundsException(){
404	<	try{
405	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
406	<	c.add(-1,"qwerty");
407	<	fail("void add(int, Object) should throw IndexOutOfBounds exception");
408	<	}catch(IndexOutOfBoundsException e){}
401	>	* lastIndexOf(E, int) returns the index of the last occurrence of the
402	>	* specified element in this list, searching backwards from index, or
403	>	* returns -1 if the element is not found
404	>	*/
405	>	public void testLastIndexOf2() {
406	>	CopyOnWriteArrayList<Item> list = populatedList(3);
407	>
408	>	// we might expect IOOBE, but spec says otherwise
409	>	mustEqual(-1, list.lastIndexOf(zero, -1));
410	>
411	>	int size = list.size();
412	>	assertThrows(
413	>	IndexOutOfBoundsException.class,
414	>	() -> list.lastIndexOf(zero, size),
415	>	() -> list.lastIndexOf(zero, Integer.MAX_VALUE));
416	>
417	>	for (int i = 0; i < size; i++) {
418	>	Item I = itemFor(i);
419	>	mustEqual(i, list.lastIndexOf(I, i));
420	>	mustEqual(list.indexOf(I), list.lastIndexOf(I, i));
421	>	if (i > 0)
422	>	mustEqual(-1, list.lastIndexOf(I, i - 1));
423	>	}
424	>	list.add(one);
425	>	list.add(three);
426	>	mustEqual(1, list.lastIndexOf(one, 1));
427	>	mustEqual(1, list.lastIndexOf(one, 2));
428	>	mustEqual(3, list.lastIndexOf(one, 3));
429	>	mustEqual(3, list.lastIndexOf(one, 4));
430	>	mustEqual(-1, list.lastIndexOf(three, 3));
431		}
432	<
432	>
433		/**
434	<	*  Test to verify add throws an IndexOutOfBoundsException on a too high index
434	>	* listIterator traverses all elements
435		*/
436	<	public void testAdd2_IndexOutOfBoundsException(){
437	<	try{
438	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
439	<	c.add("asdasd");
440	<	c.add("asdasdasd");
441	<	c.add(100, "qwerty");
442	<	fail("void add(int, Object) should throw IndexOutOfBounds exception");
425	<	}catch(IndexOutOfBoundsException e){}
436	>	public void testListIterator1() {
437	>	List<Item> list = populatedList(SIZE);
438	>	ListIterator<? extends Item> i = list.listIterator();
439	>	int j;
440	>	for (j = 0; i.hasNext(); j++)
441	>	mustEqual(j, i.next());
442	>	mustEqual(SIZE, j);
443		}
444
445		/**
446	<	*  Test to verify remove throws an IndexOutOfBoundsException on a negative index
446	>	* listIterator only returns those elements after the given index
447		*/
448	<	public void testRemove1_IndexOutOfBounds(){
449	<	try{
450	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
451	<	c.remove(-1);
452	<	fail("Object remove(int) should throw IndexOutOfBounds exception");
453	<	}catch(IndexOutOfBoundsException e){}
448	>	public void testListIterator2() {
449	>	List<Item> list = populatedList(3);
450	>	ListIterator<? extends Item> i = list.listIterator(1);
451	>	int j;
452	>	for (j = 0; i.hasNext(); j++)
453	>	mustEqual(j + 1, i.next());
454	>	mustEqual(2, j);
455		}
456
457		/**
458	<	*  Test to verify remove throws an IndexOutOfBoundsException on a too high index
458	>	* remove(int) removes and returns the object at the given index
459		*/
460	<	public void testRemove2_IndexOutOfBounds(){
461	<	try{
462	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
463	<	c.add("asdasd");
464	<	c.add("adasdasd");
465	<	c.remove(100);
466	<	fail("Object remove(int) should throw IndexOutOfBounds exception");
467	<	}catch(IndexOutOfBoundsException e){}
460	>	public void testRemove_int() {
461	>	int SIZE = 3;
462	>	for (int i = 0; i < SIZE; i++) {
463	>	List<Item> list = populatedList(SIZE);
464	>	mustEqual(i, list.remove(i));
465	>	mustEqual(SIZE - 1, list.size());
466	>	mustNotContain(list, i);
467	>	}
468		}
469	<
469	>
470		/**
471	<	*  Test to verify addAll throws an IndexOutOfBoundsException on a negative index
471	>	* remove(Object) removes the object if found and returns true
472		*/
473	<	public void testAddAll1_IndexOutOfBoundsException(){
474	<	try{
475	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
476	<	c.addAll(-1,new LinkedList());
477	<	fail("boolean add(int, Collection) should throw IndexOutOfBounds exception");
478	<	}catch(IndexOutOfBoundsException e){}
473	>	public void testRemove_Object() {
474	>	int SIZE = 3;
475	>	for (int i = 0; i < SIZE; i++) {
476	>	List<Item> list = populatedList(SIZE);
477	>	mustNotRemove(list, fortytwo);
478	>	mustRemove(list, i);
479	>	mustEqual(SIZE - 1, list.size());
480	>	mustNotContain(list, i);
481	>	}
482	>	CopyOnWriteArrayList<Item> x = new CopyOnWriteArrayList<Item>(Arrays.asList(four, five, six));
483	>	mustRemove(x, six);
484	>	mustEqual(x, Arrays.asList(four, five));
485	>	mustRemove(x, four);
486	>	mustEqual(x, Arrays.asList(five));
487	>	mustRemove(x, five);
488	>	mustEqual(x, Arrays.asList());
489	>	mustNotRemove(x, five);
490		}
491	<
491	>
492		/**
493	<	*  Test to verify addAll throws an IndexOutOfBoundsException on a too high index
493	>	* removeAll removes all elements from the given collection
494		*/
495	<	public void testAddAll2_IndexOutOfBoundsException(){
496	<	try{
497	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
498	<	c.add("asdasd");
499	<	c.add("asdasdasd");
500	<	c.addAll(100, new LinkedList());
472	<	fail("boolean addAll(int, Collection) should throw IndexOutOfBounds exception");
473	<	}catch(IndexOutOfBoundsException e){}
495	>	public void testRemoveAll() {
496	>	List<Item> list = populatedList(3);
497	>	assertTrue(list.removeAll(Arrays.asList(one, two)));
498	>	mustEqual(1, list.size());
499	>	assertFalse(list.removeAll(Arrays.asList(one, two)));
500	>	mustEqual(1, list.size());
501		}
502
503		/**
504	<	*  Test to verify listIterator throws an IndexOutOfBoundsException on a negative index
504	>	* set changes the element at the given index
505		*/
506	<	public void testListIterator1_IndexOutOfBoundsException(){
507	<	try{
508	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
509	<	c.listIterator(-1);
483	<	fail("ListIterator listIterator(int) should throw IndexOutOfBounds exceptione");
484	<	}catch(IndexOutOfBoundsException e){}
506	>	public void testSet() {
507	>	List<Item> list = populatedList(3);
508	>	mustEqual(2, list.set(2, four));
509	>	mustEqual(4, list.get(2));
510		}
511
512		/**
513	<	*  Test to verify listIterator throws an IndexOutOfBoundsException on a too high index
513	>	* size returns the number of elements
514		*/
515	<	public void testListIterator2_IndexOutOfBoundsException(){
516	<	try{
517	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
518	<	c.add("adasd");
519	<	c.add("asdasdas");
520	<	c.listIterator(100);
521	<	fail("ListIterator listIterator(int) should throw IndexOutOfBounds exception");
522	<	}catch(IndexOutOfBoundsException e){}
515	>	public void testSize() {
516	>	List<Item> empty = new CopyOnWriteArrayList<Item>();
517	>	mustEqual(0, empty.size());
518	>	mustEqual(0, empty.subList(0, 0).size());
519	>
520	>	List<Item> full = populatedList(SIZE);
521	>	mustEqual(SIZE, full.size());
522	>	mustEqual(0, full.subList(0, 0).size());
523	>	mustEqual(0, full.subList(SIZE, SIZE).size());
524		}
525
526		/**
527	<	*  Test to verify subList throws an IndexOutOfBoundsException on a negative index
527	>	* toArray() returns an Object array containing all elements from
528	>	* the list in insertion order
529		*/
530	<	public void testSubList1_IndexOutOfBoundsException(){
531	<	try{
532	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
533	<	c.subList(-1,100);
530	>	public void testToArray() {
531	>	Object[] a = new CopyOnWriteArrayList<Item>().toArray();
532	>	assertTrue(Arrays.equals(new Object[0], a));
533	>	assertSame(Object[].class, a.getClass());
534	>
535	>	Item[] elements = seqItems(SIZE);
536	>	shuffle(elements);
537	>	Collection<Item> full = populatedList(elements);
538
539	<	fail("List subList(int, int) should throw IndexOutofBounds exception");
540	<	}catch(IndexOutOfBoundsException e){}
539	>	assertTrue(Arrays.equals(elements, full.toArray()));
540	>	assertSame(Object[].class, full.toArray().getClass());
541		}
542
543		/**
544	<	*  Test to verify subList throws an IndexOutOfBoundsException on a too high index
544	>	* toArray(Item array) returns an Item array containing all
545	>	* elements from the list in insertion order
546		*/
547	<	public void testSubList2_IndexOutOfBoundsException(){
548	<	try{
549	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
550	<	c.add("asdasd");
551	<	c.subList(1,100);
552	<	fail("List subList(int, int) should throw IndexOutofBounds exception");
553	<	}catch(IndexOutOfBoundsException e){}
547	>	public void testToArray2() {
548	>	Collection<Item> empty = new CopyOnWriteArrayList<Item>();
549	>	Item[] a;
550	>
551	>	a = new Item[0];
552	>	assertSame(a, empty.toArray(a));
553	>
554	>	a = new Item[SIZE / 2];
555	>	Arrays.fill(a, fortytwo);
556	>	assertSame(a, empty.toArray(a));
557	>	assertNull(a[0]);
558	>	for (int i = 1; i < a.length; i++)
559	>	mustEqual(42, a[i]);
560	>
561	>	Item[] elements = seqItems(SIZE);
562	>	shuffle(elements);
563	>	Collection<Item> full = populatedList(elements);
564	>
565	>	Arrays.fill(a, fortytwo);
566	>	assertTrue(Arrays.equals(elements, full.toArray(a)));
567	>	for (int i = 0; i < a.length; i++)
568	>	mustEqual(42, a[i]);
569	>	assertSame(Item[].class, full.toArray(a).getClass());
570	>
571	>	a = new Item[SIZE];
572	>	Arrays.fill(a, fortytwo);
573	>	assertSame(a, full.toArray(a));
574	>	assertTrue(Arrays.equals(elements, a));
575	>
576	>	a = new Item[2 * SIZE];
577	>	Arrays.fill(a, fortytwo);
578	>	assertSame(a, full.toArray(a));
579	>	assertTrue(Arrays.equals(elements, Arrays.copyOf(a, SIZE)));
580	>	assertNull(a[SIZE]);
581	>	for (int i = SIZE + 1; i < a.length; i++)
582	>	mustEqual(42, a[i]);
583		}
584
585		/**
586	<	*  Test to verify subList throws IndexOutOfBoundsException when the second index
526	<	*  is lower then the first
586	>	* sublists contains elements at indexes offset from their base
587		*/
588	<	public void testSubList3_IndexOutOfBoundsException(){
589	<	try{
590	<	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
591	<	c.subList(3,1);
588	>	public void testSubList() {
589	>	List<Item> a = populatedList(10);
590	>	assertTrue(a.subList(1,1).isEmpty());
591	>	for (int j = 0; j < 9; ++j) {
592	>	for (int i = j ; i < 10; ++i) {
593	>	List<Item> b = a.subList(j,i);
594	>	for (int k = j; k < i; ++k) {
595	>	mustEqual(itemFor(k), b.get(k-j));
596	>	}
597	>	}
598	>	}
599
600	<	fail("List subList(int, int) should throw IndexOutofBounds exception");
601	<	}catch(IndexOutOfBoundsException e){}
600	>	List<Item> s = a.subList(2, 5);
601	>	mustEqual(3, s.size());
602	>	s.set(2, minusOne);
603	>	mustEqual(a.get(4), minusOne);
604	>	s.clear();
605	>	mustEqual(7, a.size());
606	>
607	>	assertThrows(
608	>	IndexOutOfBoundsException.class,
609	>	() -> s.get(0),
610	>	() -> s.set(0, fortytwo));
611		}
612
613	<	public void testSerialization() {
538	<	CopyOnWriteArrayList q = fullArray(10);
613	>	// Exception tests
614
615	<	try {
616	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
617	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
618	<	out.writeObject(q);
619	<	out.close();
620	<
621	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
622	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
623	<	CopyOnWriteArrayList r = (CopyOnWriteArrayList)in.readObject();
624	<	assertEquals(q.size(), r.size());
625	<	assertTrue(q.equals(r));
626	<	assertTrue(r.equals(q));
627	<	} catch(Exception e){
628	<	e.printStackTrace();
629	<	fail("unexpected exception");
615	>	/**
616	>	* toArray throws an ArrayStoreException when the given array
617	>	* can not store the objects inside the list
618	>	*/
619	>	public void testToArray_ArrayStoreException() {
620	>	List<Item> list = new CopyOnWriteArrayList<Item>();
621	>	// Items are not auto-converted to Longs
622	>	list.add(eightysix);
623	>	list.add(ninetynine);
624	>	assertThrows(
625	>	ArrayStoreException.class,
626	>	() -> list.toArray(new Long[0]),
627	>	() -> list.toArray(new Long[5]));
628	>	}
629	>
630	>	@SuppressWarnings("unchecked")
631	>	void testIndexOutOfBoundsException(List list) {
632	>	int size = list.size();
633	>	assertThrows(
634	>	IndexOutOfBoundsException.class,
635	>	() -> list.get(-1),
636	>	() -> list.get(size),
637	>	() -> list.set(-1, "qwerty"),
638	>	() -> list.set(size, "qwerty"),
639	>	() -> list.add(-1, "qwerty"),
640	>	() -> list.add(size + 1, "qwerty"),
641	>	() -> list.remove(-1),
642	>	() -> list.remove(size),
643	>	() -> list.addAll(-1, Collections.emptyList()),
644	>	() -> list.addAll(size + 1, Collections.emptyList()),
645	>	() -> list.listIterator(-1),
646	>	() -> list.listIterator(size + 1),
647	>	() -> list.subList(-1, size),
648	>	() -> list.subList(0, size + 1));
649	>
650	>	// Conversely, operations that must not throw
651	>	list.addAll(0, Collections.emptyList());
652	>	list.addAll(size, Collections.emptyList());
653	>	list.add(0, "qwerty");
654	>	list.add(list.size(), "qwerty");
655	>	list.get(0);
656	>	list.get(list.size() - 1);
657	>	list.set(0, "azerty");
658	>	list.set(list.size() - 1, "azerty");
659	>	list.listIterator(0);
660	>	list.listIterator(list.size());
661	>	list.subList(0, list.size());
662	>	list.remove(list.size() - 1);
663	>	}
664	>
665	>	/**
666	>	* IndexOutOfBoundsException is thrown when specified
667	>	*/
668	>	public void testIndexOutOfBoundsException() {
669	>	ThreadLocalRandom rnd = ThreadLocalRandom.current();
670	>	List<Item> x = populatedList(rnd.nextInt(5));
671	>	testIndexOutOfBoundsException(x);
672	>
673	>	int start = rnd.nextInt(x.size() + 1);
674	>	int end = rnd.nextInt(start, x.size() + 1);
675	>	assertThrows(
676	>	IndexOutOfBoundsException.class,
677	>	() -> x.subList(start, start - 1));
678	>	List<Item> subList = x.subList(start, end);
679	>	testIndexOutOfBoundsException(x);
680	>	}
681	>
682	>	/**
683	>	* a deserialized/reserialized list equals original
684	>	*/
685	>	public void testSerialization() throws Exception {
686	>	List<Item> x = populatedList(SIZE);
687	>	List<Item> y = serialClone(x);
688	>
689	>	assertNotSame(x, y);
690	>	mustEqual(x.size(), y.size());
691	>	mustEqual(x.toString(), y.toString());
692	>	assertTrue(Arrays.equals(x.toArray(), y.toArray()));
693	>	mustEqual(x, y);
694	>	mustEqual(y, x);
695	>	while (!x.isEmpty()) {
696	>	assertFalse(y.isEmpty());
697	>	mustEqual(x.remove(0), y.remove(0));
698		}
699	+	assertTrue(y.isEmpty());
700		}
701	<
701	>
702		}

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