| 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 |
| 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.NoSuchElementException; |
| 15 |
> |
import java.util.Set; |
| 16 |
> |
import java.util.Vector; |
| 17 |
> |
import java.util.concurrent.CopyOnWriteArraySet; |
| 18 |
> |
|
| 19 |
> |
import junit.framework.Test; |
| 20 |
> |
import junit.framework.TestSuite; |
| 21 |
|
|
| 22 |
|
public class CopyOnWriteArraySetTest extends JSR166TestCase { |
| 23 |
|
public static void main(String[] args) { |
| 27 |
|
return new TestSuite(CopyOnWriteArraySetTest.class); |
| 28 |
|
} |
| 29 |
|
|
| 30 |
< |
static CopyOnWriteArraySet populatedSet(int n) { |
| 31 |
< |
CopyOnWriteArraySet a = new CopyOnWriteArraySet(); |
| 30 |
> |
static CopyOnWriteArraySet<Integer> populatedSet(int n) { |
| 31 |
> |
CopyOnWriteArraySet<Integer> a = new CopyOnWriteArraySet<Integer>(); |
| 32 |
|
assertTrue(a.isEmpty()); |
| 33 |
< |
for (int i = 0; i < n; ++i) |
| 34 |
< |
a.add(new Integer(i)); |
| 33 |
> |
for (int i = 0; i < n; i++) |
| 34 |
> |
a.add(i); |
| 35 |
|
assertFalse(a.isEmpty()); |
| 36 |
|
assertEquals(n, a.size()); |
| 37 |
|
return a; |
| 38 |
|
} |
| 39 |
|
|
| 40 |
+ |
static CopyOnWriteArraySet populatedSet(Integer[] elements) { |
| 41 |
+ |
CopyOnWriteArraySet<Integer> a = new CopyOnWriteArraySet<Integer>(); |
| 42 |
+ |
assertTrue(a.isEmpty()); |
| 43 |
+ |
for (int i = 0; i < elements.length; i++) |
| 44 |
+ |
a.add(elements[i]); |
| 45 |
+ |
assertFalse(a.isEmpty()); |
| 46 |
+ |
assertEquals(elements.length, a.size()); |
| 47 |
+ |
return a; |
| 48 |
+ |
} |
| 49 |
+ |
|
| 50 |
|
/** |
| 51 |
|
* Default-constructed set is empty |
| 52 |
|
*/ |
| 67 |
|
assertTrue(a.contains(ints[i])); |
| 68 |
|
} |
| 69 |
|
|
| 52 |
– |
|
| 70 |
|
/** |
| 71 |
|
* addAll adds each element from the given collection |
| 72 |
|
*/ |
| 148 |
|
assertEquals(a.hashCode(), b.hashCode()); |
| 149 |
|
} |
| 150 |
|
|
| 134 |
– |
|
| 151 |
|
/** |
| 152 |
|
* containsAll returns true for collections with subset of elements |
| 153 |
|
*/ |
| 172 |
|
} |
| 173 |
|
|
| 174 |
|
/** |
| 175 |
< |
* iterator() returns an iterator containing the elements of the set |
| 175 |
> |
* iterator() returns an iterator containing the elements of the |
| 176 |
> |
* set in insertion order |
| 177 |
|
*/ |
| 178 |
|
public void testIterator() { |
| 179 |
< |
CopyOnWriteArraySet full = populatedSet(3); |
| 180 |
< |
Iterator i = full.iterator(); |
| 181 |
< |
int j; |
| 182 |
< |
for (j = 0; i.hasNext(); j++) |
| 183 |
< |
assertEquals(j, i.next()); |
| 184 |
< |
assertEquals(3, j); |
| 179 |
> |
Collection empty = new CopyOnWriteArraySet(); |
| 180 |
> |
assertFalse(empty.iterator().hasNext()); |
| 181 |
> |
try { |
| 182 |
> |
empty.iterator().next(); |
| 183 |
> |
shouldThrow(); |
| 184 |
> |
} catch (NoSuchElementException success) {} |
| 185 |
> |
|
| 186 |
> |
Integer[] elements = new Integer[SIZE]; |
| 187 |
> |
for (int i = 0; i < SIZE; i++) |
| 188 |
> |
elements[i] = i; |
| 189 |
> |
Collections.shuffle(Arrays.asList(elements)); |
| 190 |
> |
Collection<Integer> full = populatedSet(elements); |
| 191 |
> |
|
| 192 |
> |
Iterator it = full.iterator(); |
| 193 |
> |
for (int j = 0; j < SIZE; j++) { |
| 194 |
> |
assertTrue(it.hasNext()); |
| 195 |
> |
assertEquals(elements[j], it.next()); |
| 196 |
> |
} |
| 197 |
> |
assertIteratorExhausted(it); |
| 198 |
> |
} |
| 199 |
> |
|
| 200 |
> |
/** |
| 201 |
> |
* iterator of empty collection has no elements |
| 202 |
> |
*/ |
| 203 |
> |
public void testEmptyIterator() { |
| 204 |
> |
assertIteratorExhausted(new CopyOnWriteArraySet().iterator()); |
| 205 |
|
} |
| 206 |
|
|
| 207 |
|
/** |
| 221 |
|
* toString holds toString of elements |
| 222 |
|
*/ |
| 223 |
|
public void testToString() { |
| 224 |
+ |
assertEquals("[]", new CopyOnWriteArraySet().toString()); |
| 225 |
|
CopyOnWriteArraySet full = populatedSet(3); |
| 226 |
|
String s = full.toString(); |
| 227 |
< |
for (int i = 0; i < 3; ++i) { |
| 228 |
< |
assertTrue(s.indexOf(String.valueOf(i)) >= 0); |
| 229 |
< |
} |
| 227 |
> |
for (int i = 0; i < 3; ++i) |
| 228 |
> |
assertTrue(s.contains(String.valueOf(i))); |
| 229 |
> |
assertEquals(new ArrayList(full).toString(), |
| 230 |
> |
full.toString()); |
| 231 |
|
} |
| 232 |
|
|
| 194 |
– |
|
| 233 |
|
/** |
| 234 |
|
* removeAll removes all elements from the given collection |
| 235 |
|
*/ |
| 242 |
|
assertEquals(1, full.size()); |
| 243 |
|
} |
| 244 |
|
|
| 207 |
– |
|
| 245 |
|
/** |
| 246 |
|
* remove removes an element |
| 247 |
|
*/ |
| 263 |
|
} |
| 264 |
|
|
| 265 |
|
/** |
| 266 |
< |
* toArray returns an Object array containing all elements from the set |
| 266 |
> |
* toArray() returns an Object array containing all elements from |
| 267 |
> |
* the set in insertion order |
| 268 |
|
*/ |
| 269 |
|
public void testToArray() { |
| 270 |
< |
CopyOnWriteArraySet full = populatedSet(3); |
| 271 |
< |
Object[] o = full.toArray(); |
| 272 |
< |
assertEquals(3, o.length); |
| 273 |
< |
assertEquals(0, o[0]); |
| 274 |
< |
assertEquals(1, o[1]); |
| 275 |
< |
assertEquals(2, o[2]); |
| 270 |
> |
Object[] a = new CopyOnWriteArraySet().toArray(); |
| 271 |
> |
assertTrue(Arrays.equals(new Object[0], a)); |
| 272 |
> |
assertSame(Object[].class, a.getClass()); |
| 273 |
> |
|
| 274 |
> |
Integer[] elements = new Integer[SIZE]; |
| 275 |
> |
for (int i = 0; i < SIZE; i++) |
| 276 |
> |
elements[i] = i; |
| 277 |
> |
Collections.shuffle(Arrays.asList(elements)); |
| 278 |
> |
Collection<Integer> full = populatedSet(elements); |
| 279 |
> |
|
| 280 |
> |
assertTrue(Arrays.equals(elements, full.toArray())); |
| 281 |
> |
assertSame(Object[].class, full.toArray().getClass()); |
| 282 |
|
} |
| 283 |
|
|
| 284 |
|
/** |
| 285 |
< |
* toArray returns an Integer array containing all elements from |
| 286 |
< |
* the set |
| 285 |
> |
* toArray(Integer array) returns an Integer array containing all |
| 286 |
> |
* elements from the set in insertion order |
| 287 |
|
*/ |
| 288 |
|
public void testToArray2() { |
| 289 |
< |
CopyOnWriteArraySet full = populatedSet(3); |
| 290 |
< |
Integer[] i = new Integer[3]; |
| 291 |
< |
i = (Integer[])full.toArray(i); |
| 292 |
< |
assertEquals(3, i.length); |
| 293 |
< |
assertEquals(0, (int) i[0]); |
| 250 |
< |
assertEquals(1, (int) i[1]); |
| 251 |
< |
assertEquals(2, (int) i[2]); |
| 252 |
< |
} |
| 289 |
> |
Collection empty = new CopyOnWriteArraySet(); |
| 290 |
> |
Integer[] a; |
| 291 |
> |
|
| 292 |
> |
a = new Integer[0]; |
| 293 |
> |
assertSame(a, empty.toArray(a)); |
| 294 |
|
|
| 295 |
+ |
a = new Integer[SIZE/2]; |
| 296 |
+ |
Arrays.fill(a, 42); |
| 297 |
+ |
assertSame(a, empty.toArray(a)); |
| 298 |
+ |
assertNull(a[0]); |
| 299 |
+ |
for (int i = 1; i < a.length; i++) |
| 300 |
+ |
assertEquals(42, (int) a[i]); |
| 301 |
+ |
|
| 302 |
+ |
Integer[] elements = new Integer[SIZE]; |
| 303 |
+ |
for (int i = 0; i < SIZE; i++) |
| 304 |
+ |
elements[i] = i; |
| 305 |
+ |
Collections.shuffle(Arrays.asList(elements)); |
| 306 |
+ |
Collection<Integer> full = populatedSet(elements); |
| 307 |
+ |
|
| 308 |
+ |
Arrays.fill(a, 42); |
| 309 |
+ |
assertTrue(Arrays.equals(elements, full.toArray(a))); |
| 310 |
+ |
for (int i = 0; i < a.length; i++) |
| 311 |
+ |
assertEquals(42, (int) a[i]); |
| 312 |
+ |
assertSame(Integer[].class, full.toArray(a).getClass()); |
| 313 |
+ |
|
| 314 |
+ |
a = new Integer[SIZE]; |
| 315 |
+ |
Arrays.fill(a, 42); |
| 316 |
+ |
assertSame(a, full.toArray(a)); |
| 317 |
+ |
assertTrue(Arrays.equals(elements, a)); |
| 318 |
+ |
|
| 319 |
+ |
a = new Integer[2*SIZE]; |
| 320 |
+ |
Arrays.fill(a, 42); |
| 321 |
+ |
assertSame(a, full.toArray(a)); |
| 322 |
+ |
assertTrue(Arrays.equals(elements, Arrays.copyOf(a, SIZE))); |
| 323 |
+ |
assertNull(a[SIZE]); |
| 324 |
+ |
for (int i = SIZE + 1; i < a.length; i++) |
| 325 |
+ |
assertEquals(42, (int) a[i]); |
| 326 |
+ |
} |
| 327 |
|
|
| 328 |
|
/** |
| 329 |
|
* toArray throws an ArrayStoreException when the given array can |
| 343 |
|
* A deserialized serialized set is equal |
| 344 |
|
*/ |
| 345 |
|
public void testSerialization() throws Exception { |
| 346 |
< |
CopyOnWriteArraySet q = populatedSet(SIZE); |
| 346 |
> |
Set x = populatedSet(SIZE); |
| 347 |
> |
Set y = serialClone(x); |
| 348 |
> |
|
| 349 |
> |
assertNotSame(y, x); |
| 350 |
> |
assertEquals(x.size(), y.size()); |
| 351 |
> |
assertEquals(x.toString(), y.toString()); |
| 352 |
> |
assertTrue(Arrays.equals(x.toArray(), y.toArray())); |
| 353 |
> |
assertEquals(x, y); |
| 354 |
> |
assertEquals(y, x); |
| 355 |
> |
} |
| 356 |
|
|
| 357 |
< |
ByteArrayOutputStream bout = new ByteArrayOutputStream(10000); |
| 358 |
< |
ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout)); |
| 359 |
< |
out.writeObject(q); |
| 360 |
< |
out.close(); |
| 361 |
< |
|
| 362 |
< |
ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray()); |
| 363 |
< |
ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin)); |
| 364 |
< |
CopyOnWriteArraySet r = (CopyOnWriteArraySet)in.readObject(); |
| 365 |
< |
assertEquals(q.size(), r.size()); |
| 284 |
< |
assertTrue(q.equals(r)); |
| 285 |
< |
assertTrue(r.equals(q)); |
| 357 |
> |
/** |
| 358 |
> |
* addAll is idempotent |
| 359 |
> |
*/ |
| 360 |
> |
public void testAddAll_idempotent() throws Exception { |
| 361 |
> |
Set x = populatedSet(SIZE); |
| 362 |
> |
Set y = new CopyOnWriteArraySet(x); |
| 363 |
> |
y.addAll(x); |
| 364 |
> |
assertEquals(x, y); |
| 365 |
> |
assertEquals(y, x); |
| 366 |
|
} |
| 367 |
|
|
| 368 |
|
} |
