1 |
dl |
1.1 |
/* |
2 |
dl |
1.6 |
* Written by Doug Lea with assistance from members of JCP JSR-166 |
3 |
|
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* Expert Group and released to the public domain, as explained at |
4 |
jsr166 |
1.19 |
* http://creativecommons.org/publicdomain/zero/1.0/ |
5 |
jsr166 |
1.8 |
* Other contributors include Andrew Wright, Jeffrey Hayes, |
6 |
|
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* Pat Fisher, Mike Judd. |
7 |
dl |
1.1 |
*/ |
8 |
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|
9 |
jsr166 |
1.27 |
import java.util.ArrayList; |
10 |
jsr166 |
1.22 |
import java.util.Arrays; |
11 |
jsr166 |
1.26 |
import java.util.Collection; |
12 |
jsr166 |
1.48 |
import java.util.Collections; |
13 |
jsr166 |
1.22 |
import java.util.Iterator; |
14 |
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import java.util.List; |
15 |
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import java.util.ListIterator; |
16 |
jsr166 |
1.27 |
import java.util.NoSuchElementException; |
17 |
jsr166 |
1.22 |
import java.util.concurrent.CopyOnWriteArrayList; |
18 |
jsr166 |
1.48 |
import java.util.concurrent.ThreadLocalRandom; |
19 |
dl |
1.1 |
|
20 |
jsr166 |
1.31 |
import junit.framework.Test; |
21 |
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|
22 |
jsr166 |
1.10 |
public class CopyOnWriteArrayListTest extends JSR166TestCase { |
23 |
jsr166 |
1.8 |
|
24 |
dl |
1.1 |
public static void main(String[] args) { |
25 |
jsr166 |
1.34 |
main(suite(), args); |
26 |
dl |
1.1 |
} |
27 |
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|
28 |
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public static Test suite() { |
29 |
jsr166 |
1.40 |
class Implementation implements CollectionImplementation { |
30 |
jsr166 |
1.43 |
public Class<?> klazz() { return CopyOnWriteArrayList.class; } |
31 |
jsr166 |
1.40 |
public List emptyCollection() { return new CopyOnWriteArrayList(); } |
32 |
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public Object makeElement(int i) { return i; } |
33 |
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public boolean isConcurrent() { return true; } |
34 |
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public boolean permitsNulls() { return true; } |
35 |
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} |
36 |
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class SubListImplementation extends Implementation { |
37 |
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public List emptyCollection() { |
38 |
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return super.emptyCollection().subList(0, 0); |
39 |
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} |
40 |
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} |
41 |
|
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return newTestSuite( |
42 |
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CopyOnWriteArrayListTest.class, |
43 |
jsr166 |
1.41 |
CollectionTest.testSuite(new Implementation()), |
44 |
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CollectionTest.testSuite(new SubListImplementation())); |
45 |
dl |
1.1 |
} |
46 |
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|
47 |
jsr166 |
1.48 |
static CopyOnWriteArrayList<Integer> populatedList(int n) { |
48 |
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CopyOnWriteArrayList<Integer> list = new CopyOnWriteArrayList<>(); |
49 |
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assertTrue(list.isEmpty()); |
50 |
jsr166 |
1.26 |
for (int i = 0; i < n; i++) |
51 |
jsr166 |
1.48 |
list.add(i); |
52 |
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assertEquals(n <= 0, list.isEmpty()); |
53 |
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assertEquals(n, list.size()); |
54 |
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return list; |
55 |
dl |
1.1 |
} |
56 |
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|
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jsr166 |
1.48 |
static CopyOnWriteArrayList<Integer> populatedList(Integer[] elements) { |
58 |
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CopyOnWriteArrayList<Integer> list = new CopyOnWriteArrayList<>(); |
59 |
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assertTrue(list.isEmpty()); |
60 |
jsr166 |
1.46 |
for (Integer element : elements) |
61 |
jsr166 |
1.48 |
list.add(element); |
62 |
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assertFalse(list.isEmpty()); |
63 |
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assertEquals(elements.length, list.size()); |
64 |
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return list; |
65 |
jsr166 |
1.26 |
} |
66 |
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|
67 |
dl |
1.4 |
/** |
68 |
dl |
1.5 |
* a new list is empty |
69 |
dl |
1.4 |
*/ |
70 |
dl |
1.3 |
public void testConstructor() { |
71 |
jsr166 |
1.48 |
List list = new CopyOnWriteArrayList(); |
72 |
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assertTrue(list.isEmpty()); |
73 |
dl |
1.3 |
} |
74 |
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|
75 |
dl |
1.4 |
/** |
76 |
dl |
1.5 |
* new list contains all elements of initializing array |
77 |
dl |
1.4 |
*/ |
78 |
dl |
1.3 |
public void testConstructor2() { |
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jsr166 |
1.48 |
Integer[] elts = new Integer[SIZE]; |
80 |
jsr166 |
1.35 |
for (int i = 0; i < SIZE - 1; ++i) |
81 |
jsr166 |
1.48 |
elts[i] = i; |
82 |
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List list = new CopyOnWriteArrayList(elts); |
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jsr166 |
1.8 |
for (int i = 0; i < SIZE; ++i) |
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jsr166 |
1.48 |
assertEquals(elts[i], list.get(i)); |
85 |
dl |
1.3 |
} |
86 |
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|
87 |
dl |
1.4 |
/** |
88 |
dl |
1.5 |
* new list contains all elements of initializing collection |
89 |
dl |
1.4 |
*/ |
90 |
dl |
1.3 |
public void testConstructor3() { |
91 |
jsr166 |
1.48 |
Integer[] elts = new Integer[SIZE]; |
92 |
jsr166 |
1.35 |
for (int i = 0; i < SIZE - 1; ++i) |
93 |
jsr166 |
1.48 |
elts[i] = i; |
94 |
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List list = new CopyOnWriteArrayList(Arrays.asList(elts)); |
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jsr166 |
1.8 |
for (int i = 0; i < SIZE; ++i) |
96 |
jsr166 |
1.48 |
assertEquals(elts[i], list.get(i)); |
97 |
dl |
1.3 |
} |
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jsr166 |
1.8 |
|
99 |
dl |
1.1 |
/** |
100 |
jsr166 |
1.33 |
* addAll adds each element from the given collection, including duplicates |
101 |
dl |
1.1 |
*/ |
102 |
dl |
1.4 |
public void testAddAll() { |
103 |
jsr166 |
1.48 |
List list = populatedList(3); |
104 |
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assertTrue(list.addAll(Arrays.asList(three, four, five))); |
105 |
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assertEquals(6, list.size()); |
106 |
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assertTrue(list.addAll(Arrays.asList(three, four, five))); |
107 |
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assertEquals(9, list.size()); |
108 |
dl |
1.1 |
} |
109 |
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110 |
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/** |
111 |
jsr166 |
1.18 |
* addAllAbsent adds each element from the given collection that did not |
112 |
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* already exist in the List |
113 |
dl |
1.1 |
*/ |
114 |
dl |
1.4 |
public void testAddAllAbsent() { |
115 |
jsr166 |
1.48 |
CopyOnWriteArrayList list = populatedList(3); |
116 |
jsr166 |
1.33 |
// "one" is duplicate and will not be added |
117 |
jsr166 |
1.48 |
assertEquals(2, list.addAllAbsent(Arrays.asList(three, four, one))); |
118 |
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assertEquals(5, list.size()); |
119 |
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assertEquals(0, list.addAllAbsent(Arrays.asList(three, four, one))); |
120 |
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assertEquals(5, list.size()); |
121 |
dl |
1.1 |
} |
122 |
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123 |
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/** |
124 |
jsr166 |
1.18 |
* addIfAbsent will not add the element if it already exists in the list |
125 |
dl |
1.1 |
*/ |
126 |
dl |
1.4 |
public void testAddIfAbsent() { |
127 |
jsr166 |
1.48 |
CopyOnWriteArrayList list = populatedList(SIZE); |
128 |
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list.addIfAbsent(one); |
129 |
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assertEquals(SIZE, list.size()); |
130 |
dl |
1.1 |
} |
131 |
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|
132 |
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/** |
133 |
jsr166 |
1.18 |
* addIfAbsent adds the element when it does not exist in the list |
134 |
dl |
1.1 |
*/ |
135 |
dl |
1.4 |
public void testAddIfAbsent2() { |
136 |
jsr166 |
1.48 |
CopyOnWriteArrayList list = populatedList(SIZE); |
137 |
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list.addIfAbsent(three); |
138 |
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assertTrue(list.contains(three)); |
139 |
dl |
1.1 |
} |
140 |
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|
141 |
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/** |
142 |
jsr166 |
1.18 |
* clear removes all elements from the list |
143 |
dl |
1.1 |
*/ |
144 |
dl |
1.4 |
public void testClear() { |
145 |
jsr166 |
1.48 |
List list = populatedList(SIZE); |
146 |
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list.clear(); |
147 |
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assertEquals(0, list.size()); |
148 |
dl |
1.1 |
} |
149 |
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|
150 |
dl |
1.4 |
/** |
151 |
jsr166 |
1.18 |
* Cloned list is equal |
152 |
dl |
1.4 |
*/ |
153 |
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public void testClone() { |
154 |
jsr166 |
1.48 |
CopyOnWriteArrayList l1 = populatedList(SIZE); |
155 |
jsr166 |
1.11 |
CopyOnWriteArrayList l2 = (CopyOnWriteArrayList)(l1.clone()); |
156 |
dl |
1.4 |
assertEquals(l1, l2); |
157 |
jsr166 |
1.11 |
l1.clear(); |
158 |
dl |
1.4 |
assertFalse(l1.equals(l2)); |
159 |
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} |
160 |
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|
161 |
dl |
1.1 |
/** |
162 |
jsr166 |
1.18 |
* contains is true for added elements |
163 |
dl |
1.1 |
*/ |
164 |
dl |
1.4 |
public void testContains() { |
165 |
jsr166 |
1.48 |
List list = populatedList(3); |
166 |
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assertTrue(list.contains(one)); |
167 |
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assertFalse(list.contains(five)); |
168 |
dl |
1.1 |
} |
169 |
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|
170 |
dl |
1.4 |
/** |
171 |
dl |
1.7 |
* adding at an index places it in the indicated index |
172 |
dl |
1.4 |
*/ |
173 |
dl |
1.1 |
public void testAddIndex() { |
174 |
jsr166 |
1.48 |
List list = populatedList(3); |
175 |
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list.add(0, m1); |
176 |
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assertEquals(4, list.size()); |
177 |
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assertEquals(m1, list.get(0)); |
178 |
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assertEquals(zero, list.get(1)); |
179 |
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|
180 |
|
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list.add(2, m2); |
181 |
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assertEquals(5, list.size()); |
182 |
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assertEquals(m2, list.get(2)); |
183 |
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assertEquals(two, list.get(4)); |
184 |
dl |
1.1 |
} |
185 |
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|
186 |
dl |
1.4 |
/** |
187 |
dl |
1.5 |
* lists with same elements are equal and have same hashCode |
188 |
dl |
1.4 |
*/ |
189 |
dl |
1.1 |
public void testEquals() { |
190 |
jsr166 |
1.48 |
List a = populatedList(3); |
191 |
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List b = populatedList(3); |
192 |
dl |
1.1 |
assertTrue(a.equals(b)); |
193 |
|
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assertTrue(b.equals(a)); |
194 |
jsr166 |
1.37 |
assertTrue(a.containsAll(b)); |
195 |
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assertTrue(b.containsAll(a)); |
196 |
dl |
1.1 |
assertEquals(a.hashCode(), b.hashCode()); |
197 |
dl |
1.3 |
a.add(m1); |
198 |
dl |
1.1 |
assertFalse(a.equals(b)); |
199 |
|
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assertFalse(b.equals(a)); |
200 |
jsr166 |
1.37 |
assertTrue(a.containsAll(b)); |
201 |
|
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assertFalse(b.containsAll(a)); |
202 |
dl |
1.3 |
b.add(m1); |
203 |
dl |
1.1 |
assertTrue(a.equals(b)); |
204 |
|
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assertTrue(b.equals(a)); |
205 |
jsr166 |
1.37 |
assertTrue(a.containsAll(b)); |
206 |
|
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assertTrue(b.containsAll(a)); |
207 |
dl |
1.1 |
assertEquals(a.hashCode(), b.hashCode()); |
208 |
jsr166 |
1.37 |
|
209 |
|
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assertFalse(a.equals(null)); |
210 |
dl |
1.1 |
} |
211 |
|
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|
212 |
|
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/** |
213 |
jsr166 |
1.37 |
* containsAll returns true for collections with subset of elements |
214 |
dl |
1.1 |
*/ |
215 |
dl |
1.4 |
public void testContainsAll() { |
216 |
jsr166 |
1.48 |
List list = populatedList(3); |
217 |
|
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assertTrue(list.containsAll(Arrays.asList())); |
218 |
|
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assertTrue(list.containsAll(Arrays.asList(one))); |
219 |
|
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assertTrue(list.containsAll(Arrays.asList(one, two))); |
220 |
|
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assertFalse(list.containsAll(Arrays.asList(one, two, six))); |
221 |
|
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assertFalse(list.containsAll(Arrays.asList(six))); |
222 |
jsr166 |
1.37 |
|
223 |
|
|
try { |
224 |
jsr166 |
1.48 |
list.containsAll(null); |
225 |
jsr166 |
1.37 |
shouldThrow(); |
226 |
|
|
} catch (NullPointerException success) {} |
227 |
dl |
1.1 |
} |
228 |
|
|
|
229 |
|
|
/** |
230 |
jsr166 |
1.18 |
* get returns the value at the given index |
231 |
dl |
1.1 |
*/ |
232 |
dl |
1.4 |
public void testGet() { |
233 |
jsr166 |
1.48 |
List list = populatedList(3); |
234 |
|
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assertEquals(0, list.get(0)); |
235 |
dl |
1.1 |
} |
236 |
|
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|
237 |
|
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/** |
238 |
jsr166 |
1.47 |
* indexOf(Object) returns the index of the first occurrence of the |
239 |
|
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* specified element in this list, or -1 if this list does not |
240 |
|
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* contain the element |
241 |
dl |
1.1 |
*/ |
242 |
dl |
1.4 |
public void testIndexOf() { |
243 |
jsr166 |
1.48 |
List list = populatedList(3); |
244 |
jsr166 |
1.47 |
assertEquals(-1, list.indexOf(-42)); |
245 |
|
|
int size = list.size(); |
246 |
|
|
for (int i = 0; i < size; i++) { |
247 |
|
|
assertEquals(i, list.indexOf(i)); |
248 |
|
|
assertEquals(i, list.subList(0, size).indexOf(i)); |
249 |
|
|
assertEquals(i, list.subList(0, i + 1).indexOf(i)); |
250 |
|
|
assertEquals(-1, list.subList(0, i).indexOf(i)); |
251 |
|
|
assertEquals(0, list.subList(i, size).indexOf(i)); |
252 |
|
|
assertEquals(-1, list.subList(i + 1, size).indexOf(i)); |
253 |
|
|
} |
254 |
|
|
|
255 |
|
|
list.add(1); |
256 |
|
|
assertEquals(1, list.indexOf(1)); |
257 |
|
|
assertEquals(1, list.subList(0, size + 1).indexOf(1)); |
258 |
|
|
assertEquals(0, list.subList(1, size + 1).indexOf(1)); |
259 |
|
|
assertEquals(size - 2, list.subList(2, size + 1).indexOf(1)); |
260 |
|
|
assertEquals(0, list.subList(size, size + 1).indexOf(1)); |
261 |
|
|
assertEquals(-1, list.subList(size + 1, size + 1).indexOf(1)); |
262 |
dl |
1.1 |
} |
263 |
|
|
|
264 |
|
|
/** |
265 |
jsr166 |
1.47 |
* indexOf(E, int) returns the index of the first occurrence of the |
266 |
|
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* specified element in this list, searching forwards from index, |
267 |
|
|
* or returns -1 if the element is not found |
268 |
dl |
1.1 |
*/ |
269 |
dl |
1.4 |
public void testIndexOf2() { |
270 |
jsr166 |
1.48 |
CopyOnWriteArrayList list = populatedList(3); |
271 |
jsr166 |
1.47 |
int size = list.size(); |
272 |
|
|
assertEquals(-1, list.indexOf(-42, 0)); |
273 |
|
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|
274 |
|
|
// we might expect IOOBE, but spec says otherwise |
275 |
|
|
assertEquals(-1, list.indexOf(0, size)); |
276 |
|
|
assertEquals(-1, list.indexOf(0, Integer.MAX_VALUE)); |
277 |
|
|
|
278 |
|
|
assertThrows( |
279 |
|
|
IndexOutOfBoundsException.class, |
280 |
|
|
() -> list.indexOf(0, -1), |
281 |
|
|
() -> list.indexOf(0, Integer.MIN_VALUE)); |
282 |
|
|
|
283 |
|
|
for (int i = 0; i < size; i++) { |
284 |
|
|
assertEquals(i, list.indexOf(i, 0)); |
285 |
|
|
assertEquals(i, list.indexOf(i, i)); |
286 |
|
|
assertEquals(-1, list.indexOf(i, i + 1)); |
287 |
|
|
} |
288 |
|
|
|
289 |
|
|
list.add(1); |
290 |
|
|
assertEquals(1, list.indexOf(1, 0)); |
291 |
|
|
assertEquals(1, list.indexOf(1, 1)); |
292 |
|
|
assertEquals(size, list.indexOf(1, 2)); |
293 |
|
|
assertEquals(size, list.indexOf(1, size)); |
294 |
dl |
1.1 |
} |
295 |
|
|
|
296 |
|
|
/** |
297 |
jsr166 |
1.18 |
* isEmpty returns true when empty, else false |
298 |
dl |
1.1 |
*/ |
299 |
dl |
1.4 |
public void testIsEmpty() { |
300 |
jsr166 |
1.48 |
List empty = new CopyOnWriteArrayList(); |
301 |
jsr166 |
1.11 |
assertTrue(empty.isEmpty()); |
302 |
jsr166 |
1.48 |
assertTrue(empty.subList(0, 0).isEmpty()); |
303 |
|
|
|
304 |
|
|
List full = populatedList(SIZE); |
305 |
jsr166 |
1.11 |
assertFalse(full.isEmpty()); |
306 |
jsr166 |
1.48 |
assertTrue(full.subList(0, 0).isEmpty()); |
307 |
|
|
assertTrue(full.subList(SIZE, SIZE).isEmpty()); |
308 |
dl |
1.1 |
} |
309 |
|
|
|
310 |
|
|
/** |
311 |
jsr166 |
1.27 |
* iterator() returns an iterator containing the elements of the |
312 |
|
|
* list in insertion order |
313 |
dl |
1.1 |
*/ |
314 |
dl |
1.4 |
public void testIterator() { |
315 |
jsr166 |
1.27 |
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 |
jsr166 |
1.38 |
shuffle(elements); |
326 |
jsr166 |
1.48 |
Collection<Integer> full = populatedList(elements); |
327 |
jsr166 |
1.27 |
|
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 |
jsr166 |
1.32 |
assertIteratorExhausted(it); |
334 |
|
|
} |
335 |
|
|
|
336 |
|
|
/** |
337 |
|
|
* iterator of empty collection has no elements |
338 |
|
|
*/ |
339 |
|
|
public void testEmptyIterator() { |
340 |
|
|
Collection c = new CopyOnWriteArrayList(); |
341 |
|
|
assertIteratorExhausted(c.iterator()); |
342 |
dl |
1.1 |
} |
343 |
|
|
|
344 |
dl |
1.4 |
/** |
345 |
dl |
1.5 |
* iterator.remove throws UnsupportedOperationException |
346 |
dl |
1.4 |
*/ |
347 |
jsr166 |
1.17 |
public void testIteratorRemove() { |
348 |
jsr166 |
1.48 |
CopyOnWriteArrayList list = populatedList(SIZE); |
349 |
|
|
Iterator it = list.iterator(); |
350 |
dl |
1.1 |
it.next(); |
351 |
|
|
try { |
352 |
|
|
it.remove(); |
353 |
dl |
1.4 |
shouldThrow(); |
354 |
jsr166 |
1.12 |
} catch (UnsupportedOperationException success) {} |
355 |
dl |
1.1 |
} |
356 |
|
|
|
357 |
dl |
1.4 |
/** |
358 |
dl |
1.5 |
* toString contains toString of elements |
359 |
dl |
1.4 |
*/ |
360 |
|
|
public void testToString() { |
361 |
jsr166 |
1.27 |
assertEquals("[]", new CopyOnWriteArrayList().toString()); |
362 |
jsr166 |
1.48 |
List list = populatedList(3); |
363 |
|
|
String s = list.toString(); |
364 |
jsr166 |
1.27 |
for (int i = 0; i < 3; ++i) |
365 |
jsr166 |
1.20 |
assertTrue(s.contains(String.valueOf(i))); |
366 |
jsr166 |
1.48 |
assertEquals(new ArrayList(list).toString(), |
367 |
|
|
list.toString()); |
368 |
jsr166 |
1.8 |
} |
369 |
dl |
1.1 |
|
370 |
|
|
/** |
371 |
jsr166 |
1.47 |
* 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 |
dl |
1.1 |
*/ |
375 |
dl |
1.4 |
public void testLastIndexOf1() { |
376 |
jsr166 |
1.48 |
List list = populatedList(3); |
377 |
jsr166 |
1.47 |
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 |
dl |
1.1 |
} |
395 |
|
|
|
396 |
|
|
/** |
397 |
jsr166 |
1.47 |
* 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 |
dl |
1.1 |
*/ |
401 |
jsr166 |
1.21 |
public void testLastIndexOf2() { |
402 |
jsr166 |
1.48 |
CopyOnWriteArrayList list = populatedList(3); |
403 |
jsr166 |
1.47 |
|
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 |
dl |
1.1 |
} |
427 |
|
|
|
428 |
|
|
/** |
429 |
jsr166 |
1.18 |
* listIterator traverses all elements |
430 |
dl |
1.1 |
*/ |
431 |
dl |
1.4 |
public void testListIterator1() { |
432 |
jsr166 |
1.48 |
List list = populatedList(SIZE); |
433 |
|
|
ListIterator i = list.listIterator(); |
434 |
jsr166 |
1.11 |
int j; |
435 |
|
|
for (j = 0; i.hasNext(); j++) |
436 |
jsr166 |
1.14 |
assertEquals(j, i.next()); |
437 |
jsr166 |
1.11 |
assertEquals(SIZE, j); |
438 |
dl |
1.1 |
} |
439 |
|
|
|
440 |
|
|
/** |
441 |
jsr166 |
1.18 |
* listIterator only returns those elements after the given index |
442 |
dl |
1.1 |
*/ |
443 |
dl |
1.4 |
public void testListIterator2() { |
444 |
jsr166 |
1.48 |
List list = populatedList(3); |
445 |
|
|
ListIterator i = list.listIterator(1); |
446 |
jsr166 |
1.11 |
int j; |
447 |
|
|
for (j = 0; i.hasNext(); j++) |
448 |
jsr166 |
1.36 |
assertEquals(j + 1, i.next()); |
449 |
jsr166 |
1.11 |
assertEquals(2, j); |
450 |
dl |
1.1 |
} |
451 |
|
|
|
452 |
|
|
/** |
453 |
jsr166 |
1.28 |
* remove(int) removes and returns the object at the given index |
454 |
dl |
1.1 |
*/ |
455 |
jsr166 |
1.28 |
public void testRemove_int() { |
456 |
|
|
int SIZE = 3; |
457 |
|
|
for (int i = 0; i < SIZE; i++) { |
458 |
jsr166 |
1.48 |
List list = populatedList(SIZE); |
459 |
|
|
assertEquals(i, list.remove(i)); |
460 |
|
|
assertEquals(SIZE - 1, list.size()); |
461 |
|
|
assertFalse(list.contains(new Integer(i))); |
462 |
jsr166 |
1.28 |
} |
463 |
|
|
} |
464 |
|
|
|
465 |
|
|
/** |
466 |
|
|
* remove(Object) removes the object if found and returns true |
467 |
|
|
*/ |
468 |
|
|
public void testRemove_Object() { |
469 |
|
|
int SIZE = 3; |
470 |
|
|
for (int i = 0; i < SIZE; i++) { |
471 |
jsr166 |
1.48 |
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 |
jsr166 |
1.28 |
} |
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 |
dl |
1.1 |
} |
486 |
|
|
|
487 |
|
|
/** |
488 |
jsr166 |
1.18 |
* removeAll removes all elements from the given collection |
489 |
dl |
1.1 |
*/ |
490 |
dl |
1.4 |
public void testRemoveAll() { |
491 |
jsr166 |
1.48 |
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 |
dl |
1.1 |
} |
497 |
|
|
|
498 |
|
|
/** |
499 |
jsr166 |
1.18 |
* set changes the element at the given index |
500 |
dl |
1.1 |
*/ |
501 |
dl |
1.4 |
public void testSet() { |
502 |
jsr166 |
1.48 |
List list = populatedList(3); |
503 |
|
|
assertEquals(2, list.set(2, four)); |
504 |
|
|
assertEquals(4, list.get(2)); |
505 |
dl |
1.1 |
} |
506 |
|
|
|
507 |
|
|
/** |
508 |
jsr166 |
1.18 |
* size returns the number of elements |
509 |
dl |
1.1 |
*/ |
510 |
dl |
1.4 |
public void testSize() { |
511 |
jsr166 |
1.48 |
List empty = new CopyOnWriteArrayList(); |
512 |
|
|
assertEquals(0, empty.size()); |
513 |
|
|
assertEquals(0, empty.subList(0, 0).size()); |
514 |
|
|
|
515 |
|
|
List full = populatedList(SIZE); |
516 |
jsr166 |
1.11 |
assertEquals(SIZE, full.size()); |
517 |
jsr166 |
1.48 |
assertEquals(0, full.subList(0, 0).size()); |
518 |
|
|
assertEquals(0, full.subList(SIZE, SIZE).size()); |
519 |
dl |
1.1 |
} |
520 |
|
|
|
521 |
|
|
/** |
522 |
jsr166 |
1.26 |
* toArray() returns an Object array containing all elements from |
523 |
|
|
* the list in insertion order |
524 |
dl |
1.1 |
*/ |
525 |
dl |
1.4 |
public void testToArray() { |
526 |
jsr166 |
1.26 |
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 |
jsr166 |
1.38 |
shuffle(elements); |
534 |
jsr166 |
1.48 |
Collection<Integer> full = populatedList(elements); |
535 |
jsr166 |
1.26 |
|
536 |
|
|
assertTrue(Arrays.equals(elements, full.toArray())); |
537 |
|
|
assertSame(Object[].class, full.toArray().getClass()); |
538 |
dl |
1.1 |
} |
539 |
|
|
|
540 |
|
|
/** |
541 |
jsr166 |
1.26 |
* toArray(Integer array) returns an Integer array containing all |
542 |
|
|
* elements from the list in insertion order |
543 |
dl |
1.1 |
*/ |
544 |
dl |
1.4 |
public void testToArray2() { |
545 |
jsr166 |
1.26 |
Collection empty = new CopyOnWriteArrayList(); |
546 |
|
|
Integer[] a; |
547 |
|
|
|
548 |
|
|
a = new Integer[0]; |
549 |
|
|
assertSame(a, empty.toArray(a)); |
550 |
|
|
|
551 |
jsr166 |
1.35 |
a = new Integer[SIZE / 2]; |
552 |
jsr166 |
1.26 |
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 |
jsr166 |
1.38 |
shuffle(elements); |
562 |
jsr166 |
1.48 |
Collection<Integer> full = populatedList(elements); |
563 |
jsr166 |
1.26 |
|
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 |
jsr166 |
1.35 |
a = new Integer[2 * SIZE]; |
576 |
jsr166 |
1.26 |
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 |
dl |
1.1 |
} |
583 |
|
|
|
584 |
dl |
1.4 |
/** |
585 |
dl |
1.5 |
* sublists contains elements at indexes offset from their base |
586 |
dl |
1.4 |
*/ |
587 |
dl |
1.1 |
public void testSubList() { |
588 |
jsr166 |
1.48 |
List a = populatedList(10); |
589 |
dl |
1.1 |
assertTrue(a.subList(1,1).isEmpty()); |
590 |
jsr166 |
1.11 |
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 |
dl |
1.1 |
|
599 |
jsr166 |
1.11 |
List s = a.subList(2, 5); |
600 |
jsr166 |
1.24 |
assertEquals(3, s.size()); |
601 |
dl |
1.3 |
s.set(2, m1); |
602 |
dl |
1.1 |
assertEquals(a.get(4), m1); |
603 |
jsr166 |
1.11 |
s.clear(); |
604 |
jsr166 |
1.24 |
assertEquals(7, a.size()); |
605 |
jsr166 |
1.47 |
|
606 |
|
|
assertThrows( |
607 |
|
|
IndexOutOfBoundsException.class, |
608 |
|
|
() -> s.get(0), |
609 |
|
|
() -> s.set(0, 42)); |
610 |
dl |
1.1 |
} |
611 |
|
|
|
612 |
|
|
// Exception tests |
613 |
|
|
|
614 |
|
|
/** |
615 |
jsr166 |
1.18 |
* toArray throws an ArrayStoreException when the given array |
616 |
|
|
* can not store the objects inside the list |
617 |
dl |
1.1 |
*/ |
618 |
dl |
1.4 |
public void testToArray_ArrayStoreException() { |
619 |
jsr166 |
1.48 |
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 |
dl |
1.1 |
} |
628 |
|
|
|
629 |
jsr166 |
1.48 |
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 |
dl |
1.1 |
} |
662 |
jsr166 |
1.8 |
|
663 |
dl |
1.1 |
/** |
664 |
jsr166 |
1.48 |
* 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 |
dl |
1.1 |
|
671 |
jsr166 |
1.48 |
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 |
dl |
1.2 |
} |
679 |
|
|
|
680 |
dl |
1.4 |
/** |
681 |
jsr166 |
1.45 |
* a deserialized/reserialized list equals original |
682 |
dl |
1.4 |
*/ |
683 |
jsr166 |
1.12 |
public void testSerialization() throws Exception { |
684 |
jsr166 |
1.48 |
List x = populatedList(SIZE); |
685 |
jsr166 |
1.22 |
List y = serialClone(x); |
686 |
dl |
1.2 |
|
687 |
jsr166 |
1.29 |
assertNotSame(x, y); |
688 |
jsr166 |
1.22 |
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 |
dl |
1.1 |
} |
699 |
jsr166 |
1.8 |
|
700 |
dl |
1.1 |
} |