1 |
/* |
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/licenses/publicdomain |
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.*; |
13 |
|
14 |
public class CopyOnWriteArraySetTest extends JSR166TestCase { |
15 |
public static void main(String[] args) { |
16 |
junit.textui.TestRunner.run (suite()); |
17 |
} |
18 |
public static Test suite() { |
19 |
return new TestSuite(CopyOnWriteArraySetTest.class); |
20 |
} |
21 |
|
22 |
static CopyOnWriteArraySet populatedSet(int n) { |
23 |
CopyOnWriteArraySet a = new CopyOnWriteArraySet(); |
24 |
assertTrue(a.isEmpty()); |
25 |
for (int i = 0; i < n; ++i) |
26 |
a.add(new Integer(i)); |
27 |
assertFalse(a.isEmpty()); |
28 |
assertEquals(n, a.size()); |
29 |
return a; |
30 |
} |
31 |
|
32 |
/** |
33 |
* Default-constructed set is empty |
34 |
*/ |
35 |
public void testConstructor() { |
36 |
CopyOnWriteArraySet a = new CopyOnWriteArraySet(); |
37 |
assertTrue(a.isEmpty()); |
38 |
} |
39 |
|
40 |
/** |
41 |
* Collection-constructed set holds all of its elements |
42 |
*/ |
43 |
public void testConstructor3() { |
44 |
Integer[] ints = new Integer[SIZE]; |
45 |
for (int i = 0; i < SIZE-1; ++i) |
46 |
ints[i] = new Integer(i); |
47 |
CopyOnWriteArraySet a = new CopyOnWriteArraySet(Arrays.asList(ints)); |
48 |
for (int i = 0; i < SIZE; ++i) |
49 |
assertTrue(a.contains(ints[i])); |
50 |
} |
51 |
|
52 |
|
53 |
/** |
54 |
* addAll adds each element from the given collection |
55 |
*/ |
56 |
public void testAddAll() { |
57 |
CopyOnWriteArraySet full = populatedSet(3); |
58 |
Vector v = new Vector(); |
59 |
v.add(three); |
60 |
v.add(four); |
61 |
v.add(five); |
62 |
full.addAll(v); |
63 |
assertEquals(6, full.size()); |
64 |
} |
65 |
|
66 |
/** |
67 |
* addAll adds each element from the given collection that did not |
68 |
* already exist in the set |
69 |
*/ |
70 |
public void testAddAll2() { |
71 |
CopyOnWriteArraySet full = populatedSet(3); |
72 |
Vector v = new Vector(); |
73 |
v.add(three); |
74 |
v.add(four); |
75 |
v.add(one); // will not add this element |
76 |
full.addAll(v); |
77 |
assertEquals(5, full.size()); |
78 |
} |
79 |
|
80 |
/** |
81 |
* add will not add the element if it already exists in the set |
82 |
*/ |
83 |
public void testAdd2() { |
84 |
CopyOnWriteArraySet full = populatedSet(3); |
85 |
full.add(one); |
86 |
assertEquals(3, full.size()); |
87 |
} |
88 |
|
89 |
/** |
90 |
* add adds the element when it does not exist |
91 |
* in the set |
92 |
*/ |
93 |
public void testAdd3() { |
94 |
CopyOnWriteArraySet full = populatedSet(3); |
95 |
full.add(three); |
96 |
assertTrue(full.contains(three)); |
97 |
} |
98 |
|
99 |
/** |
100 |
* clear removes all elements from the set |
101 |
*/ |
102 |
public void testClear() { |
103 |
CopyOnWriteArraySet full = populatedSet(3); |
104 |
full.clear(); |
105 |
assertEquals(0, full.size()); |
106 |
} |
107 |
|
108 |
/** |
109 |
* contains returns true for added elements |
110 |
*/ |
111 |
public void testContains() { |
112 |
CopyOnWriteArraySet full = populatedSet(3); |
113 |
assertTrue(full.contains(one)); |
114 |
assertFalse(full.contains(five)); |
115 |
} |
116 |
|
117 |
/** |
118 |
* Sets with equal elements are equal |
119 |
*/ |
120 |
public void testEquals() { |
121 |
CopyOnWriteArraySet a = populatedSet(3); |
122 |
CopyOnWriteArraySet b = populatedSet(3); |
123 |
assertTrue(a.equals(b)); |
124 |
assertTrue(b.equals(a)); |
125 |
assertEquals(a.hashCode(), b.hashCode()); |
126 |
a.add(m1); |
127 |
assertFalse(a.equals(b)); |
128 |
assertFalse(b.equals(a)); |
129 |
b.add(m1); |
130 |
assertTrue(a.equals(b)); |
131 |
assertTrue(b.equals(a)); |
132 |
assertEquals(a.hashCode(), b.hashCode()); |
133 |
} |
134 |
|
135 |
|
136 |
/** |
137 |
* containsAll returns true for collections with subset of elements |
138 |
*/ |
139 |
public void testContainsAll() { |
140 |
CopyOnWriteArraySet full = populatedSet(3); |
141 |
Vector v = new Vector(); |
142 |
v.add(one); |
143 |
v.add(two); |
144 |
assertTrue(full.containsAll(v)); |
145 |
v.add(six); |
146 |
assertFalse(full.containsAll(v)); |
147 |
} |
148 |
|
149 |
/** |
150 |
* isEmpty is true when empty, else false |
151 |
*/ |
152 |
public void testIsEmpty() { |
153 |
CopyOnWriteArraySet empty = new CopyOnWriteArraySet(); |
154 |
CopyOnWriteArraySet full = populatedSet(3); |
155 |
assertTrue(empty.isEmpty()); |
156 |
assertFalse(full.isEmpty()); |
157 |
} |
158 |
|
159 |
/** |
160 |
* iterator() returns an iterator containing the elements of the set |
161 |
*/ |
162 |
public void testIterator() { |
163 |
CopyOnWriteArraySet full = populatedSet(3); |
164 |
Iterator i = full.iterator(); |
165 |
int j; |
166 |
for (j = 0; i.hasNext(); j++) |
167 |
assertEquals(j, i.next()); |
168 |
assertEquals(3, j); |
169 |
} |
170 |
|
171 |
/** |
172 |
* iterator remove is unsupported |
173 |
*/ |
174 |
public void testIteratorRemove () { |
175 |
CopyOnWriteArraySet full = populatedSet(3); |
176 |
Iterator it = full.iterator(); |
177 |
it.next(); |
178 |
try { |
179 |
it.remove(); |
180 |
shouldThrow(); |
181 |
} catch (UnsupportedOperationException success) {} |
182 |
} |
183 |
|
184 |
/** |
185 |
* toString holds toString of elements |
186 |
*/ |
187 |
public void testToString() { |
188 |
CopyOnWriteArraySet full = populatedSet(3); |
189 |
String s = full.toString(); |
190 |
for (int i = 0; i < 3; ++i) { |
191 |
assertTrue(s.indexOf(String.valueOf(i)) >= 0); |
192 |
} |
193 |
} |
194 |
|
195 |
|
196 |
/** |
197 |
* removeAll removes all elements from the given collection |
198 |
*/ |
199 |
public void testRemoveAll() { |
200 |
CopyOnWriteArraySet full = populatedSet(3); |
201 |
Vector v = new Vector(); |
202 |
v.add(one); |
203 |
v.add(two); |
204 |
full.removeAll(v); |
205 |
assertEquals(1, full.size()); |
206 |
} |
207 |
|
208 |
|
209 |
/** |
210 |
* remove removes an element |
211 |
*/ |
212 |
public void testRemove() { |
213 |
CopyOnWriteArraySet full = populatedSet(3); |
214 |
full.remove(one); |
215 |
assertFalse(full.contains(one)); |
216 |
assertEquals(2, full.size()); |
217 |
} |
218 |
|
219 |
/** |
220 |
* size returns the number of elements |
221 |
*/ |
222 |
public void testSize() { |
223 |
CopyOnWriteArraySet empty = new CopyOnWriteArraySet(); |
224 |
CopyOnWriteArraySet full = populatedSet(3); |
225 |
assertEquals(3, full.size()); |
226 |
assertEquals(0, empty.size()); |
227 |
} |
228 |
|
229 |
/** |
230 |
* toArray returns an Object array containing all elements from the set |
231 |
*/ |
232 |
public void testToArray() { |
233 |
CopyOnWriteArraySet full = populatedSet(3); |
234 |
Object[] o = full.toArray(); |
235 |
assertEquals(3, o.length); |
236 |
assertEquals(0, o[0]); |
237 |
assertEquals(1, o[1]); |
238 |
assertEquals(2, o[2]); |
239 |
} |
240 |
|
241 |
/** |
242 |
* toArray returns an Integer array containing all elements from |
243 |
* the set |
244 |
*/ |
245 |
public void testToArray2() { |
246 |
CopyOnWriteArraySet full = populatedSet(3); |
247 |
Integer[] i = new Integer[3]; |
248 |
i = (Integer[])full.toArray(i); |
249 |
assertEquals(3, i.length); |
250 |
assertEquals(0, (int) i[0]); |
251 |
assertEquals(1, (int) i[1]); |
252 |
assertEquals(2, (int) i[2]); |
253 |
} |
254 |
|
255 |
|
256 |
/** |
257 |
* toArray throws an ArrayStoreException when the given array can |
258 |
* not store the objects inside the set |
259 |
*/ |
260 |
public void testToArray_ArrayStoreException() { |
261 |
try { |
262 |
CopyOnWriteArraySet c = new CopyOnWriteArraySet(); |
263 |
c.add("zfasdfsdf"); |
264 |
c.add("asdadasd"); |
265 |
c.toArray(new Long[5]); |
266 |
shouldThrow(); |
267 |
} catch (ArrayStoreException success) {} |
268 |
} |
269 |
|
270 |
/** |
271 |
* A deserialized serialized set is equal |
272 |
*/ |
273 |
public void testSerialization() throws Exception { |
274 |
CopyOnWriteArraySet q = populatedSet(SIZE); |
275 |
|
276 |
ByteArrayOutputStream bout = new ByteArrayOutputStream(10000); |
277 |
ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout)); |
278 |
out.writeObject(q); |
279 |
out.close(); |
280 |
|
281 |
ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray()); |
282 |
ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin)); |
283 |
CopyOnWriteArraySet r = (CopyOnWriteArraySet)in.readObject(); |
284 |
assertEquals(q.size(), r.size()); |
285 |
assertTrue(q.equals(r)); |
286 |
assertTrue(r.equals(q)); |
287 |
} |
288 |
|
289 |
} |