1 |
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/* |
2 |
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* 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 |
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< |
* http://creativecommons.org/licenses/publicdomain |
4 |
> |
* http://creativecommons.org/publicdomain/zero/1.0/ |
5 |
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* Other contributors include Andrew Wright, Jeffrey Hayes, |
6 |
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* Pat Fisher, Mike Judd. |
7 |
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*/ |
8 |
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|
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.Iterator; |
13 |
> |
import java.util.NoSuchElementException; |
14 |
> |
import java.util.Set; |
15 |
> |
import java.util.concurrent.CopyOnWriteArraySet; |
16 |
> |
|
17 |
> |
import junit.framework.Test; |
18 |
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|
19 |
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public class CopyOnWriteArraySetTest extends JSR166TestCase { |
20 |
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public static void main(String[] args) { |
21 |
< |
junit.textui.TestRunner.run(suite()); |
21 |
> |
main(suite(), args); |
22 |
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} |
23 |
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public static Test suite() { |
24 |
< |
return new TestSuite(CopyOnWriteArraySetTest.class); |
24 |
> |
class Implementation implements CollectionImplementation { |
25 |
> |
public Class<?> klazz() { return CopyOnWriteArraySet.class; } |
26 |
> |
public Set emptyCollection() { return new CopyOnWriteArraySet(); } |
27 |
> |
public Object makeElement(int i) { return i; } |
28 |
> |
public boolean isConcurrent() { return true; } |
29 |
> |
public boolean permitsNulls() { return true; } |
30 |
> |
} |
31 |
> |
return newTestSuite( |
32 |
> |
CopyOnWriteArraySetTest.class, |
33 |
> |
CollectionTest.testSuite(new Implementation())); |
34 |
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} |
35 |
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|
36 |
< |
static CopyOnWriteArraySet populatedSet(int n) { |
37 |
< |
CopyOnWriteArraySet a = new CopyOnWriteArraySet(); |
36 |
> |
static CopyOnWriteArraySet<Integer> populatedSet(int n) { |
37 |
> |
CopyOnWriteArraySet<Integer> a = new CopyOnWriteArraySet<>(); |
38 |
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assertTrue(a.isEmpty()); |
39 |
< |
for (int i = 0; i < n; ++i) |
40 |
< |
a.add(new Integer(i)); |
41 |
< |
assertFalse(a.isEmpty()); |
39 |
> |
for (int i = 0; i < n; i++) |
40 |
> |
a.add(i); |
41 |
> |
assertEquals(n == 0, a.isEmpty()); |
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assertEquals(n, a.size()); |
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return a; |
44 |
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} |
45 |
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|
46 |
+ |
static CopyOnWriteArraySet populatedSet(Integer[] elements) { |
47 |
+ |
CopyOnWriteArraySet<Integer> a = new CopyOnWriteArraySet<>(); |
48 |
+ |
assertTrue(a.isEmpty()); |
49 |
+ |
for (int i = 0; i < elements.length; i++) |
50 |
+ |
a.add(elements[i]); |
51 |
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assertFalse(a.isEmpty()); |
52 |
+ |
assertEquals(elements.length, a.size()); |
53 |
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return a; |
54 |
+ |
} |
55 |
+ |
|
56 |
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/** |
57 |
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* Default-constructed set is empty |
58 |
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*/ |
66 |
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*/ |
67 |
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public void testConstructor3() { |
68 |
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Integer[] ints = new Integer[SIZE]; |
69 |
< |
for (int i = 0; i < SIZE-1; ++i) |
69 |
> |
for (int i = 0; i < SIZE - 1; ++i) |
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ints[i] = new Integer(i); |
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CopyOnWriteArraySet a = new CopyOnWriteArraySet(Arrays.asList(ints)); |
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for (int i = 0; i < SIZE; ++i) |
73 |
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assertTrue(a.contains(ints[i])); |
74 |
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} |
75 |
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|
52 |
– |
|
76 |
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/** |
77 |
< |
* addAll adds each element from the given collection |
77 |
> |
* addAll adds each non-duplicate element from the given collection |
78 |
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*/ |
79 |
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public void testAddAll() { |
80 |
< |
CopyOnWriteArraySet full = populatedSet(3); |
81 |
< |
Vector v = new Vector(); |
82 |
< |
v.add(three); |
83 |
< |
v.add(four); |
61 |
< |
v.add(five); |
62 |
< |
full.addAll(v); |
80 |
> |
Set full = populatedSet(3); |
81 |
> |
assertTrue(full.addAll(Arrays.asList(three, four, five))); |
82 |
> |
assertEquals(6, full.size()); |
83 |
> |
assertFalse(full.addAll(Arrays.asList(three, four, five))); |
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assertEquals(6, full.size()); |
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} |
86 |
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|
87 |
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/** |
88 |
< |
* addAll adds each element from the given collection that did not |
68 |
< |
* already exist in the set |
88 |
> |
* addAll adds each non-duplicate element from the given collection |
89 |
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*/ |
90 |
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public void testAddAll2() { |
91 |
< |
CopyOnWriteArraySet full = populatedSet(3); |
92 |
< |
Vector v = new Vector(); |
93 |
< |
v.add(three); |
94 |
< |
v.add(four); |
95 |
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v.add(one); // will not add this element |
76 |
< |
full.addAll(v); |
91 |
> |
Set full = populatedSet(3); |
92 |
> |
// "one" is duplicate and will not be added |
93 |
> |
assertTrue(full.addAll(Arrays.asList(three, four, one))); |
94 |
> |
assertEquals(5, full.size()); |
95 |
> |
assertFalse(full.addAll(Arrays.asList(three, four, one))); |
96 |
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assertEquals(5, full.size()); |
97 |
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} |
98 |
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|
100 |
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* add will not add the element if it already exists in the set |
101 |
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*/ |
102 |
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public void testAdd2() { |
103 |
< |
CopyOnWriteArraySet full = populatedSet(3); |
103 |
> |
Set full = populatedSet(3); |
104 |
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full.add(one); |
105 |
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assertEquals(3, full.size()); |
106 |
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} |
109 |
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* add adds the element when it does not exist in the set |
110 |
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*/ |
111 |
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public void testAdd3() { |
112 |
< |
CopyOnWriteArraySet full = populatedSet(3); |
112 |
> |
Set full = populatedSet(3); |
113 |
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full.add(three); |
114 |
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assertTrue(full.contains(three)); |
115 |
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} |
118 |
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* clear removes all elements from the set |
119 |
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*/ |
120 |
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public void testClear() { |
121 |
< |
CopyOnWriteArraySet full = populatedSet(3); |
121 |
> |
Collection full = populatedSet(3); |
122 |
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full.clear(); |
123 |
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assertEquals(0, full.size()); |
124 |
+ |
assertTrue(full.isEmpty()); |
125 |
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} |
126 |
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|
127 |
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/** |
128 |
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* contains returns true for added elements |
129 |
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*/ |
130 |
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public void testContains() { |
131 |
< |
CopyOnWriteArraySet full = populatedSet(3); |
131 |
> |
Collection full = populatedSet(3); |
132 |
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assertTrue(full.contains(one)); |
133 |
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assertFalse(full.contains(five)); |
134 |
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} |
141 |
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CopyOnWriteArraySet b = populatedSet(3); |
142 |
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assertTrue(a.equals(b)); |
143 |
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assertTrue(b.equals(a)); |
144 |
+ |
assertTrue(a.containsAll(b)); |
145 |
+ |
assertTrue(b.containsAll(a)); |
146 |
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assertEquals(a.hashCode(), b.hashCode()); |
147 |
+ |
assertEquals(a.size(), b.size()); |
148 |
+ |
|
149 |
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a.add(m1); |
150 |
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assertFalse(a.equals(b)); |
151 |
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assertFalse(b.equals(a)); |
152 |
+ |
assertTrue(a.containsAll(b)); |
153 |
+ |
assertFalse(b.containsAll(a)); |
154 |
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b.add(m1); |
155 |
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assertTrue(a.equals(b)); |
156 |
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assertTrue(b.equals(a)); |
157 |
+ |
assertTrue(a.containsAll(b)); |
158 |
+ |
assertTrue(b.containsAll(a)); |
159 |
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assertEquals(a.hashCode(), b.hashCode()); |
132 |
– |
} |
160 |
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|
161 |
+ |
Object x = a.iterator().next(); |
162 |
+ |
a.remove(x); |
163 |
+ |
assertFalse(a.equals(b)); |
164 |
+ |
assertFalse(b.equals(a)); |
165 |
+ |
assertFalse(a.containsAll(b)); |
166 |
+ |
assertTrue(b.containsAll(a)); |
167 |
+ |
a.add(x); |
168 |
+ |
assertTrue(a.equals(b)); |
169 |
+ |
assertTrue(b.equals(a)); |
170 |
+ |
assertTrue(a.containsAll(b)); |
171 |
+ |
assertTrue(b.containsAll(a)); |
172 |
+ |
assertEquals(a.hashCode(), b.hashCode()); |
173 |
+ |
assertEquals(a.size(), b.size()); |
174 |
+ |
|
175 |
+ |
CopyOnWriteArraySet empty1 = new CopyOnWriteArraySet(Arrays.asList()); |
176 |
+ |
CopyOnWriteArraySet empty2 = new CopyOnWriteArraySet(Arrays.asList()); |
177 |
+ |
assertTrue(empty1.equals(empty1)); |
178 |
+ |
assertTrue(empty1.equals(empty2)); |
179 |
+ |
|
180 |
+ |
assertFalse(empty1.equals(a)); |
181 |
+ |
assertFalse(a.equals(empty1)); |
182 |
+ |
|
183 |
+ |
assertFalse(a.equals(null)); |
184 |
+ |
} |
185 |
|
|
186 |
|
/** |
187 |
|
* containsAll returns true for collections with subset of elements |
188 |
|
*/ |
189 |
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public void testContainsAll() { |
190 |
< |
CopyOnWriteArraySet full = populatedSet(3); |
191 |
< |
Vector v = new Vector(); |
192 |
< |
v.add(one); |
193 |
< |
v.add(two); |
194 |
< |
assertTrue(full.containsAll(v)); |
195 |
< |
v.add(six); |
196 |
< |
assertFalse(full.containsAll(v)); |
190 |
> |
Collection full = populatedSet(3); |
191 |
> |
assertTrue(full.containsAll(full)); |
192 |
> |
assertTrue(full.containsAll(Arrays.asList())); |
193 |
> |
assertTrue(full.containsAll(Arrays.asList(one))); |
194 |
> |
assertTrue(full.containsAll(Arrays.asList(one, two))); |
195 |
> |
assertFalse(full.containsAll(Arrays.asList(one, two, six))); |
196 |
> |
assertFalse(full.containsAll(Arrays.asList(six))); |
197 |
> |
|
198 |
> |
CopyOnWriteArraySet empty1 = new CopyOnWriteArraySet(Arrays.asList()); |
199 |
> |
CopyOnWriteArraySet empty2 = new CopyOnWriteArraySet(Arrays.asList()); |
200 |
> |
assertTrue(empty1.containsAll(empty2)); |
201 |
> |
assertTrue(empty1.containsAll(empty1)); |
202 |
> |
assertFalse(empty1.containsAll(full)); |
203 |
> |
assertTrue(full.containsAll(empty1)); |
204 |
> |
|
205 |
> |
try { |
206 |
> |
full.containsAll(null); |
207 |
> |
shouldThrow(); |
208 |
> |
} catch (NullPointerException success) {} |
209 |
|
} |
210 |
|
|
211 |
|
/** |
212 |
|
* isEmpty is true when empty, else false |
213 |
|
*/ |
214 |
|
public void testIsEmpty() { |
215 |
< |
CopyOnWriteArraySet empty = new CopyOnWriteArraySet(); |
216 |
< |
CopyOnWriteArraySet full = populatedSet(3); |
154 |
< |
assertTrue(empty.isEmpty()); |
155 |
< |
assertFalse(full.isEmpty()); |
215 |
> |
assertTrue(populatedSet(0).isEmpty()); |
216 |
> |
assertFalse(populatedSet(3).isEmpty()); |
217 |
|
} |
218 |
|
|
219 |
|
/** |
220 |
< |
* iterator() returns an iterator containing the elements of the set |
220 |
> |
* iterator() returns an iterator containing the elements of the |
221 |
> |
* set in insertion order |
222 |
|
*/ |
223 |
|
public void testIterator() { |
224 |
< |
CopyOnWriteArraySet full = populatedSet(3); |
225 |
< |
Iterator i = full.iterator(); |
226 |
< |
int j; |
227 |
< |
for (j = 0; i.hasNext(); j++) |
228 |
< |
assertEquals(j, i.next()); |
229 |
< |
assertEquals(3, j); |
224 |
> |
Collection empty = new CopyOnWriteArraySet(); |
225 |
> |
assertFalse(empty.iterator().hasNext()); |
226 |
> |
try { |
227 |
> |
empty.iterator().next(); |
228 |
> |
shouldThrow(); |
229 |
> |
} catch (NoSuchElementException success) {} |
230 |
> |
|
231 |
> |
Integer[] elements = new Integer[SIZE]; |
232 |
> |
for (int i = 0; i < SIZE; i++) |
233 |
> |
elements[i] = i; |
234 |
> |
shuffle(elements); |
235 |
> |
Collection<Integer> full = populatedSet(elements); |
236 |
> |
|
237 |
> |
Iterator it = full.iterator(); |
238 |
> |
for (int j = 0; j < SIZE; j++) { |
239 |
> |
assertTrue(it.hasNext()); |
240 |
> |
assertEquals(elements[j], it.next()); |
241 |
> |
} |
242 |
> |
assertIteratorExhausted(it); |
243 |
> |
} |
244 |
> |
|
245 |
> |
/** |
246 |
> |
* iterator of empty collection has no elements |
247 |
> |
*/ |
248 |
> |
public void testEmptyIterator() { |
249 |
> |
assertIteratorExhausted(new CopyOnWriteArraySet().iterator()); |
250 |
|
} |
251 |
|
|
252 |
|
/** |
253 |
|
* iterator remove is unsupported |
254 |
|
*/ |
255 |
|
public void testIteratorRemove() { |
256 |
< |
CopyOnWriteArraySet full = populatedSet(3); |
256 |
> |
Collection full = populatedSet(3); |
257 |
|
Iterator it = full.iterator(); |
258 |
|
it.next(); |
259 |
|
try { |
266 |
|
* toString holds toString of elements |
267 |
|
*/ |
268 |
|
public void testToString() { |
269 |
< |
CopyOnWriteArraySet full = populatedSet(3); |
269 |
> |
assertEquals("[]", new CopyOnWriteArraySet().toString()); |
270 |
> |
Collection full = populatedSet(3); |
271 |
|
String s = full.toString(); |
272 |
< |
for (int i = 0; i < 3; ++i) { |
273 |
< |
assertTrue(s.indexOf(String.valueOf(i)) >= 0); |
274 |
< |
} |
272 |
> |
for (int i = 0; i < 3; ++i) |
273 |
> |
assertTrue(s.contains(String.valueOf(i))); |
274 |
> |
assertEquals(new ArrayList(full).toString(), |
275 |
> |
full.toString()); |
276 |
|
} |
277 |
|
|
194 |
– |
|
278 |
|
/** |
279 |
|
* removeAll removes all elements from the given collection |
280 |
|
*/ |
281 |
|
public void testRemoveAll() { |
282 |
< |
CopyOnWriteArraySet full = populatedSet(3); |
283 |
< |
Vector v = new Vector(); |
284 |
< |
v.add(one); |
285 |
< |
v.add(two); |
203 |
< |
full.removeAll(v); |
282 |
> |
Set full = populatedSet(3); |
283 |
> |
assertTrue(full.removeAll(Arrays.asList(one, two))); |
284 |
> |
assertEquals(1, full.size()); |
285 |
> |
assertFalse(full.removeAll(Arrays.asList(one, two))); |
286 |
|
assertEquals(1, full.size()); |
287 |
|
} |
288 |
|
|
207 |
– |
|
289 |
|
/** |
290 |
|
* remove removes an element |
291 |
|
*/ |
292 |
|
public void testRemove() { |
293 |
< |
CopyOnWriteArraySet full = populatedSet(3); |
293 |
> |
Collection full = populatedSet(3); |
294 |
|
full.remove(one); |
295 |
|
assertFalse(full.contains(one)); |
296 |
|
assertEquals(2, full.size()); |
300 |
|
* size returns the number of elements |
301 |
|
*/ |
302 |
|
public void testSize() { |
303 |
< |
CopyOnWriteArraySet empty = new CopyOnWriteArraySet(); |
304 |
< |
CopyOnWriteArraySet full = populatedSet(3); |
303 |
> |
Collection empty = new CopyOnWriteArraySet(); |
304 |
> |
Collection full = populatedSet(3); |
305 |
|
assertEquals(3, full.size()); |
306 |
|
assertEquals(0, empty.size()); |
307 |
|
} |
308 |
|
|
309 |
|
/** |
310 |
< |
* toArray returns an Object array containing all elements from the set |
310 |
> |
* toArray() returns an Object array containing all elements from |
311 |
> |
* the set in insertion order |
312 |
|
*/ |
313 |
|
public void testToArray() { |
314 |
< |
CopyOnWriteArraySet full = populatedSet(3); |
315 |
< |
Object[] o = full.toArray(); |
316 |
< |
assertEquals(3, o.length); |
317 |
< |
assertEquals(0, o[0]); |
318 |
< |
assertEquals(1, o[1]); |
319 |
< |
assertEquals(2, o[2]); |
314 |
> |
Object[] a = new CopyOnWriteArraySet().toArray(); |
315 |
> |
assertTrue(Arrays.equals(new Object[0], a)); |
316 |
> |
assertSame(Object[].class, a.getClass()); |
317 |
> |
|
318 |
> |
Integer[] elements = new Integer[SIZE]; |
319 |
> |
for (int i = 0; i < SIZE; i++) |
320 |
> |
elements[i] = i; |
321 |
> |
shuffle(elements); |
322 |
> |
Collection<Integer> full = populatedSet(elements); |
323 |
> |
|
324 |
> |
assertTrue(Arrays.equals(elements, full.toArray())); |
325 |
> |
assertSame(Object[].class, full.toArray().getClass()); |
326 |
|
} |
327 |
|
|
328 |
|
/** |
329 |
< |
* toArray returns an Integer array containing all elements from |
330 |
< |
* the set |
329 |
> |
* toArray(Integer array) returns an Integer array containing all |
330 |
> |
* elements from the set in insertion order |
331 |
|
*/ |
332 |
|
public void testToArray2() { |
333 |
< |
CopyOnWriteArraySet full = populatedSet(3); |
334 |
< |
Integer[] i = new Integer[3]; |
335 |
< |
i = (Integer[])full.toArray(i); |
336 |
< |
assertEquals(3, i.length); |
337 |
< |
assertEquals(0, (int) i[0]); |
250 |
< |
assertEquals(1, (int) i[1]); |
251 |
< |
assertEquals(2, (int) i[2]); |
252 |
< |
} |
333 |
> |
Collection empty = new CopyOnWriteArraySet(); |
334 |
> |
Integer[] a; |
335 |
> |
|
336 |
> |
a = new Integer[0]; |
337 |
> |
assertSame(a, empty.toArray(a)); |
338 |
|
|
339 |
+ |
a = new Integer[SIZE / 2]; |
340 |
+ |
Arrays.fill(a, 42); |
341 |
+ |
assertSame(a, empty.toArray(a)); |
342 |
+ |
assertNull(a[0]); |
343 |
+ |
for (int i = 1; i < a.length; i++) |
344 |
+ |
assertEquals(42, (int) a[i]); |
345 |
+ |
|
346 |
+ |
Integer[] elements = new Integer[SIZE]; |
347 |
+ |
for (int i = 0; i < SIZE; i++) |
348 |
+ |
elements[i] = i; |
349 |
+ |
shuffle(elements); |
350 |
+ |
Collection<Integer> full = populatedSet(elements); |
351 |
+ |
|
352 |
+ |
Arrays.fill(a, 42); |
353 |
+ |
assertTrue(Arrays.equals(elements, full.toArray(a))); |
354 |
+ |
for (int i = 0; i < a.length; i++) |
355 |
+ |
assertEquals(42, (int) a[i]); |
356 |
+ |
assertSame(Integer[].class, full.toArray(a).getClass()); |
357 |
+ |
|
358 |
+ |
a = new Integer[SIZE]; |
359 |
+ |
Arrays.fill(a, 42); |
360 |
+ |
assertSame(a, full.toArray(a)); |
361 |
+ |
assertTrue(Arrays.equals(elements, a)); |
362 |
+ |
|
363 |
+ |
a = new Integer[2 * SIZE]; |
364 |
+ |
Arrays.fill(a, 42); |
365 |
+ |
assertSame(a, full.toArray(a)); |
366 |
+ |
assertTrue(Arrays.equals(elements, Arrays.copyOf(a, SIZE))); |
367 |
+ |
assertNull(a[SIZE]); |
368 |
+ |
for (int i = SIZE + 1; i < a.length; i++) |
369 |
+ |
assertEquals(42, (int) a[i]); |
370 |
+ |
} |
371 |
|
|
372 |
|
/** |
373 |
|
* toArray throws an ArrayStoreException when the given array can |
374 |
|
* not store the objects inside the set |
375 |
|
*/ |
376 |
|
public void testToArray_ArrayStoreException() { |
377 |
+ |
CopyOnWriteArraySet c = new CopyOnWriteArraySet(); |
378 |
+ |
c.add("zfasdfsdf"); |
379 |
+ |
c.add("asdadasd"); |
380 |
|
try { |
261 |
– |
CopyOnWriteArraySet c = new CopyOnWriteArraySet(); |
262 |
– |
c.add("zfasdfsdf"); |
263 |
– |
c.add("asdadasd"); |
381 |
|
c.toArray(new Long[5]); |
382 |
|
shouldThrow(); |
383 |
|
} catch (ArrayStoreException success) {} |
384 |
|
} |
385 |
|
|
386 |
|
/** |
387 |
< |
* A deserialized serialized set is equal |
387 |
> |
* A deserialized/reserialized set equals original |
388 |
|
*/ |
389 |
|
public void testSerialization() throws Exception { |
390 |
< |
CopyOnWriteArraySet q = populatedSet(SIZE); |
390 |
> |
Set x = populatedSet(SIZE); |
391 |
> |
Set y = serialClone(x); |
392 |
|
|
393 |
< |
ByteArrayOutputStream bout = new ByteArrayOutputStream(10000); |
394 |
< |
ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout)); |
395 |
< |
out.writeObject(q); |
396 |
< |
out.close(); |
397 |
< |
|
398 |
< |
ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray()); |
399 |
< |
ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin)); |
400 |
< |
CopyOnWriteArraySet r = (CopyOnWriteArraySet)in.readObject(); |
401 |
< |
assertEquals(q.size(), r.size()); |
402 |
< |
assertTrue(q.equals(r)); |
403 |
< |
assertTrue(r.equals(q)); |
393 |
> |
assertNotSame(y, x); |
394 |
> |
assertEquals(x.size(), y.size()); |
395 |
> |
assertEquals(x.toString(), y.toString()); |
396 |
> |
assertTrue(Arrays.equals(x.toArray(), y.toArray())); |
397 |
> |
assertEquals(x, y); |
398 |
> |
assertEquals(y, x); |
399 |
> |
} |
400 |
> |
|
401 |
> |
/** |
402 |
> |
* addAll is idempotent |
403 |
> |
*/ |
404 |
> |
public void testAddAll_idempotent() throws Exception { |
405 |
> |
Set x = populatedSet(SIZE); |
406 |
> |
Set y = new CopyOnWriteArraySet(x); |
407 |
> |
y.addAll(x); |
408 |
> |
assertEquals(x, y); |
409 |
> |
assertEquals(y, x); |
410 |
|
} |
411 |
|
|
412 |
|
} |