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/licenses/publicdomain |
5 |
> |
* Other contributors include Andrew Wright, Jeffrey Hayes, |
6 |
> |
* Pat Fisher, Mike Judd. |
7 |
|
*/ |
8 |
|
|
9 |
|
import junit.framework.*; |
14 |
|
public class ConcurrentLinkedQueueTest extends JSR166TestCase { |
15 |
|
|
16 |
|
public static void main(String[] args) { |
17 |
< |
junit.textui.TestRunner.run (suite()); |
17 |
> |
junit.textui.TestRunner.run (suite()); |
18 |
|
} |
19 |
|
|
20 |
|
public static Test suite() { |
21 |
< |
return new TestSuite(ConcurrentLinkedQueueTest.class); |
21 |
> |
return new TestSuite(ConcurrentLinkedQueueTest.class); |
22 |
|
} |
23 |
|
|
24 |
|
/** |
28 |
|
private ConcurrentLinkedQueue populatedQueue(int n) { |
29 |
|
ConcurrentLinkedQueue q = new ConcurrentLinkedQueue(); |
30 |
|
assertTrue(q.isEmpty()); |
31 |
< |
for(int i = 0; i < n; ++i) |
32 |
< |
assertTrue(q.offer(new Integer(i))); |
31 |
> |
for (int i = 0; i < n; ++i) |
32 |
> |
assertTrue(q.offer(new Integer(i))); |
33 |
|
assertFalse(q.isEmpty()); |
34 |
< |
assertEquals(n, q.size()); |
34 |
> |
assertEquals(n, q.size()); |
35 |
|
return q; |
36 |
|
} |
37 |
< |
|
37 |
> |
|
38 |
|
/** |
39 |
< |
* |
39 |
> |
* new queue is empty |
40 |
|
*/ |
41 |
|
public void testConstructor1() { |
42 |
|
assertEquals(0, new ConcurrentLinkedQueue().size()); |
43 |
|
} |
44 |
|
|
45 |
|
/** |
46 |
< |
* |
46 |
> |
* Initializing from null Collection throws NPE |
47 |
|
*/ |
48 |
|
public void testConstructor3() { |
49 |
|
try { |
50 |
|
ConcurrentLinkedQueue q = new ConcurrentLinkedQueue((Collection)null); |
51 |
|
shouldThrow(); |
52 |
< |
} |
52 |
< |
catch (NullPointerException success) {} |
52 |
> |
} catch (NullPointerException success) {} |
53 |
|
} |
54 |
|
|
55 |
|
/** |
56 |
< |
* |
56 |
> |
* Initializing from Collection of null elements throws NPE |
57 |
|
*/ |
58 |
|
public void testConstructor4() { |
59 |
|
try { |
60 |
|
Integer[] ints = new Integer[SIZE]; |
61 |
|
ConcurrentLinkedQueue q = new ConcurrentLinkedQueue(Arrays.asList(ints)); |
62 |
|
shouldThrow(); |
63 |
< |
} |
64 |
< |
catch (NullPointerException success) {} |
63 |
> |
} catch (NullPointerException success) {} |
64 |
|
} |
65 |
|
|
66 |
|
/** |
67 |
< |
* |
67 |
> |
* Initializing from Collection with some null elements throws NPE |
68 |
|
*/ |
69 |
|
public void testConstructor5() { |
70 |
|
try { |
73 |
|
ints[i] = new Integer(i); |
74 |
|
ConcurrentLinkedQueue q = new ConcurrentLinkedQueue(Arrays.asList(ints)); |
75 |
|
shouldThrow(); |
76 |
< |
} |
78 |
< |
catch (NullPointerException success) {} |
76 |
> |
} catch (NullPointerException success) {} |
77 |
|
} |
78 |
|
|
79 |
|
/** |
80 |
< |
* |
80 |
> |
* Queue contains all elements of collection used to initialize |
81 |
|
*/ |
82 |
|
public void testConstructor6() { |
83 |
< |
try { |
84 |
< |
Integer[] ints = new Integer[SIZE]; |
85 |
< |
for (int i = 0; i < SIZE; ++i) |
86 |
< |
ints[i] = new Integer(i); |
87 |
< |
ConcurrentLinkedQueue q = new ConcurrentLinkedQueue(Arrays.asList(ints)); |
88 |
< |
for (int i = 0; i < SIZE; ++i) |
91 |
< |
assertEquals(ints[i], q.poll()); |
92 |
< |
} |
93 |
< |
finally {} |
83 |
> |
Integer[] ints = new Integer[SIZE]; |
84 |
> |
for (int i = 0; i < SIZE; ++i) |
85 |
> |
ints[i] = new Integer(i); |
86 |
> |
ConcurrentLinkedQueue q = new ConcurrentLinkedQueue(Arrays.asList(ints)); |
87 |
> |
for (int i = 0; i < SIZE; ++i) |
88 |
> |
assertEquals(ints[i], q.poll()); |
89 |
|
} |
90 |
|
|
91 |
|
/** |
92 |
< |
* |
92 |
> |
* isEmpty is true before add, false after |
93 |
|
*/ |
94 |
|
public void testEmpty() { |
95 |
|
ConcurrentLinkedQueue q = new ConcurrentLinkedQueue(); |
103 |
|
} |
104 |
|
|
105 |
|
/** |
106 |
< |
* |
106 |
> |
* size changes when elements added and removed |
107 |
|
*/ |
108 |
|
public void testSize() { |
109 |
|
ConcurrentLinkedQueue q = populatedQueue(SIZE); |
118 |
|
} |
119 |
|
|
120 |
|
/** |
121 |
< |
* |
121 |
> |
* offer(null) throws NPE |
122 |
|
*/ |
123 |
|
public void testOfferNull() { |
124 |
< |
try { |
124 |
> |
try { |
125 |
|
ConcurrentLinkedQueue q = new ConcurrentLinkedQueue(); |
126 |
|
q.offer(null); |
127 |
|
shouldThrow(); |
128 |
< |
} catch (NullPointerException success) { } |
128 |
> |
} catch (NullPointerException success) {} |
129 |
> |
} |
130 |
> |
|
131 |
> |
/** |
132 |
> |
* add(null) throws NPE |
133 |
> |
*/ |
134 |
> |
public void testAddNull() { |
135 |
> |
try { |
136 |
> |
ConcurrentLinkedQueue q = new ConcurrentLinkedQueue(); |
137 |
> |
q.add(null); |
138 |
> |
shouldThrow(); |
139 |
> |
} catch (NullPointerException success) {} |
140 |
|
} |
141 |
|
|
142 |
+ |
|
143 |
|
/** |
144 |
< |
* |
144 |
> |
* Offer returns true |
145 |
|
*/ |
146 |
|
public void testOffer() { |
147 |
|
ConcurrentLinkedQueue q = new ConcurrentLinkedQueue(); |
150 |
|
} |
151 |
|
|
152 |
|
/** |
153 |
< |
* |
153 |
> |
* add returns true |
154 |
|
*/ |
155 |
|
public void testAdd() { |
156 |
|
ConcurrentLinkedQueue q = new ConcurrentLinkedQueue(); |
161 |
|
} |
162 |
|
|
163 |
|
/** |
164 |
< |
* |
164 |
> |
* addAll(null) throws NPE |
165 |
|
*/ |
166 |
|
public void testAddAll1() { |
167 |
|
try { |
168 |
|
ConcurrentLinkedQueue q = new ConcurrentLinkedQueue(); |
169 |
|
q.addAll(null); |
170 |
|
shouldThrow(); |
171 |
< |
} |
165 |
< |
catch (NullPointerException success) {} |
171 |
> |
} catch (NullPointerException success) {} |
172 |
|
} |
173 |
+ |
|
174 |
|
/** |
175 |
< |
* |
175 |
> |
* addAll(this) throws IAE |
176 |
> |
*/ |
177 |
> |
public void testAddAllSelf() { |
178 |
> |
try { |
179 |
> |
ConcurrentLinkedQueue q = populatedQueue(SIZE); |
180 |
> |
q.addAll(q); |
181 |
> |
shouldThrow(); |
182 |
> |
} catch (IllegalArgumentException success) {} |
183 |
> |
} |
184 |
> |
|
185 |
> |
/** |
186 |
> |
* addAll of a collection with null elements throws NPE |
187 |
|
*/ |
188 |
|
public void testAddAll2() { |
189 |
|
try { |
191 |
|
Integer[] ints = new Integer[SIZE]; |
192 |
|
q.addAll(Arrays.asList(ints)); |
193 |
|
shouldThrow(); |
194 |
< |
} |
177 |
< |
catch (NullPointerException success) {} |
194 |
> |
} catch (NullPointerException success) {} |
195 |
|
} |
196 |
|
/** |
197 |
< |
* |
197 |
> |
* addAll of a collection with any null elements throws NPE after |
198 |
> |
* possibly adding some elements |
199 |
|
*/ |
200 |
|
public void testAddAll3() { |
201 |
|
try { |
205 |
|
ints[i] = new Integer(i); |
206 |
|
q.addAll(Arrays.asList(ints)); |
207 |
|
shouldThrow(); |
208 |
< |
} |
191 |
< |
catch (NullPointerException success) {} |
208 |
> |
} catch (NullPointerException success) {} |
209 |
|
} |
210 |
|
|
211 |
|
/** |
212 |
< |
* |
212 |
> |
* Queue contains all elements, in traversal order, of successful addAll |
213 |
|
*/ |
214 |
|
public void testAddAll5() { |
215 |
< |
try { |
216 |
< |
Integer[] empty = new Integer[0]; |
217 |
< |
Integer[] ints = new Integer[SIZE]; |
218 |
< |
for (int i = 0; i < SIZE; ++i) |
219 |
< |
ints[i] = new Integer(i); |
220 |
< |
ConcurrentLinkedQueue q = new ConcurrentLinkedQueue(); |
221 |
< |
assertFalse(q.addAll(Arrays.asList(empty))); |
222 |
< |
assertTrue(q.addAll(Arrays.asList(ints))); |
223 |
< |
for (int i = 0; i < SIZE; ++i) |
207 |
< |
assertEquals(ints[i], q.poll()); |
208 |
< |
} |
209 |
< |
finally {} |
215 |
> |
Integer[] empty = new Integer[0]; |
216 |
> |
Integer[] ints = new Integer[SIZE]; |
217 |
> |
for (int i = 0; i < SIZE; ++i) |
218 |
> |
ints[i] = new Integer(i); |
219 |
> |
ConcurrentLinkedQueue q = new ConcurrentLinkedQueue(); |
220 |
> |
assertFalse(q.addAll(Arrays.asList(empty))); |
221 |
> |
assertTrue(q.addAll(Arrays.asList(ints))); |
222 |
> |
for (int i = 0; i < SIZE; ++i) |
223 |
> |
assertEquals(ints[i], q.poll()); |
224 |
|
} |
225 |
|
|
226 |
|
/** |
227 |
< |
* |
227 |
> |
* poll succeeds unless empty |
228 |
|
*/ |
229 |
|
public void testPoll() { |
230 |
|
ConcurrentLinkedQueue q = populatedQueue(SIZE); |
231 |
|
for (int i = 0; i < SIZE; ++i) { |
232 |
< |
assertEquals(i, ((Integer)q.poll()).intValue()); |
232 |
> |
assertEquals(i, q.poll()); |
233 |
|
} |
234 |
< |
assertNull(q.poll()); |
234 |
> |
assertNull(q.poll()); |
235 |
|
} |
236 |
|
|
237 |
|
/** |
238 |
< |
* |
238 |
> |
* peek returns next element, or null if empty |
239 |
|
*/ |
240 |
|
public void testPeek() { |
241 |
|
ConcurrentLinkedQueue q = populatedQueue(SIZE); |
242 |
|
for (int i = 0; i < SIZE; ++i) { |
243 |
< |
assertEquals(i, ((Integer)q.peek()).intValue()); |
244 |
< |
q.poll(); |
243 |
> |
assertEquals(i, q.peek()); |
244 |
> |
assertEquals(i, q.poll()); |
245 |
|
assertTrue(q.peek() == null || |
246 |
< |
i != ((Integer)q.peek()).intValue()); |
246 |
> |
!q.peek().equals(i)); |
247 |
|
} |
248 |
< |
assertNull(q.peek()); |
248 |
> |
assertNull(q.peek()); |
249 |
|
} |
250 |
|
|
251 |
|
/** |
252 |
< |
* |
252 |
> |
* element returns next element, or throws NSEE if empty |
253 |
|
*/ |
254 |
|
public void testElement() { |
255 |
|
ConcurrentLinkedQueue q = populatedQueue(SIZE); |
256 |
|
for (int i = 0; i < SIZE; ++i) { |
257 |
< |
assertEquals(i, ((Integer)q.element()).intValue()); |
258 |
< |
q.poll(); |
257 |
> |
assertEquals(i, q.element()); |
258 |
> |
assertEquals(i, q.poll()); |
259 |
|
} |
260 |
|
try { |
261 |
|
q.element(); |
262 |
|
shouldThrow(); |
263 |
< |
} |
250 |
< |
catch (NoSuchElementException success) {} |
263 |
> |
} catch (NoSuchElementException success) {} |
264 |
|
} |
265 |
|
|
266 |
|
/** |
267 |
< |
* |
267 |
> |
* remove removes next element, or throws NSEE if empty |
268 |
|
*/ |
269 |
|
public void testRemove() { |
270 |
|
ConcurrentLinkedQueue q = populatedQueue(SIZE); |
271 |
|
for (int i = 0; i < SIZE; ++i) { |
272 |
< |
assertEquals(i, ((Integer)q.remove()).intValue()); |
272 |
> |
assertEquals(i, q.remove()); |
273 |
|
} |
274 |
|
try { |
275 |
|
q.remove(); |
276 |
|
shouldThrow(); |
277 |
< |
} catch (NoSuchElementException success){ |
265 |
< |
} |
277 |
> |
} catch (NoSuchElementException success) {} |
278 |
|
} |
279 |
|
|
280 |
|
/** |
281 |
< |
* |
281 |
> |
* remove(x) removes x and returns true if present |
282 |
|
*/ |
283 |
|
public void testRemoveElement() { |
284 |
|
ConcurrentLinkedQueue q = populatedQueue(SIZE); |
291 |
|
} |
292 |
|
assertTrue(q.isEmpty()); |
293 |
|
} |
294 |
< |
|
294 |
> |
|
295 |
|
/** |
296 |
< |
* |
296 |
> |
* contains(x) reports true when elements added but not yet removed |
297 |
|
*/ |
298 |
|
public void testContains() { |
299 |
|
ConcurrentLinkedQueue q = populatedQueue(SIZE); |
305 |
|
} |
306 |
|
|
307 |
|
/** |
308 |
< |
* |
308 |
> |
* clear removes all elements |
309 |
|
*/ |
310 |
|
public void testClear() { |
311 |
|
ConcurrentLinkedQueue q = populatedQueue(SIZE); |
319 |
|
} |
320 |
|
|
321 |
|
/** |
322 |
< |
* |
322 |
> |
* containsAll(c) is true when c contains a subset of elements |
323 |
|
*/ |
324 |
|
public void testContainsAll() { |
325 |
|
ConcurrentLinkedQueue q = populatedQueue(SIZE); |
333 |
|
} |
334 |
|
|
335 |
|
/** |
336 |
< |
* |
336 |
> |
* retainAll(c) retains only those elements of c and reports true if change |
337 |
|
*/ |
338 |
|
public void testRetainAll() { |
339 |
|
ConcurrentLinkedQueue q = populatedQueue(SIZE); |
352 |
|
} |
353 |
|
|
354 |
|
/** |
355 |
< |
* |
355 |
> |
* removeAll(c) removes only those elements of c and reports true if changed |
356 |
|
*/ |
357 |
|
public void testRemoveAll() { |
358 |
|
for (int i = 1; i < SIZE; ++i) { |
368 |
|
} |
369 |
|
|
370 |
|
/** |
371 |
< |
* |
371 |
> |
* toArray contains all elements |
372 |
|
*/ |
373 |
|
public void testToArray() { |
374 |
|
ConcurrentLinkedQueue q = populatedQueue(SIZE); |
375 |
< |
Object[] o = q.toArray(); |
375 |
> |
Object[] o = q.toArray(); |
376 |
|
Arrays.sort(o); |
377 |
< |
for(int i = 0; i < o.length; i++) |
378 |
< |
assertEquals(o[i], q.poll()); |
377 |
> |
for (int i = 0; i < o.length; i++) |
378 |
> |
assertEquals(o[i], q.poll()); |
379 |
|
} |
380 |
|
|
381 |
|
/** |
382 |
< |
* |
382 |
> |
* toArray(a) contains all elements |
383 |
|
*/ |
384 |
|
public void testToArray2() { |
385 |
|
ConcurrentLinkedQueue q = populatedQueue(SIZE); |
386 |
< |
Integer[] ints = new Integer[SIZE]; |
387 |
< |
ints = (Integer[])q.toArray(ints); |
386 |
> |
Integer[] ints = new Integer[SIZE]; |
387 |
> |
ints = (Integer[])q.toArray(ints); |
388 |
|
Arrays.sort(ints); |
389 |
< |
for(int i = 0; i < ints.length; i++) |
389 |
> |
for (int i = 0; i < ints.length; i++) |
390 |
|
assertEquals(ints[i], q.poll()); |
391 |
|
} |
392 |
< |
|
392 |
> |
|
393 |
|
/** |
394 |
< |
* |
394 |
> |
* toArray(null) throws NPE |
395 |
> |
*/ |
396 |
> |
public void testToArray_BadArg() { |
397 |
> |
ConcurrentLinkedQueue q = populatedQueue(SIZE); |
398 |
> |
try { |
399 |
> |
Object o[] = q.toArray(null); |
400 |
> |
shouldThrow(); |
401 |
> |
} catch (NullPointerException success) {} |
402 |
> |
} |
403 |
> |
|
404 |
> |
/** |
405 |
> |
* toArray with incompatible array type throws ArrayStoreException |
406 |
> |
*/ |
407 |
> |
public void testToArray1_BadArg() { |
408 |
> |
ConcurrentLinkedQueue q = populatedQueue(SIZE); |
409 |
> |
try { |
410 |
> |
Object o[] = q.toArray(new String[10]); |
411 |
> |
shouldThrow(); |
412 |
> |
} catch (ArrayStoreException success) {} |
413 |
> |
} |
414 |
> |
|
415 |
> |
/** |
416 |
> |
* iterator iterates through all elements |
417 |
|
*/ |
418 |
|
public void testIterator() { |
419 |
|
ConcurrentLinkedQueue q = populatedQueue(SIZE); |
420 |
|
int i = 0; |
421 |
< |
Iterator it = q.iterator(); |
422 |
< |
while(it.hasNext()) { |
421 |
> |
Iterator it = q.iterator(); |
422 |
> |
while (it.hasNext()) { |
423 |
|
assertTrue(q.contains(it.next())); |
424 |
|
++i; |
425 |
|
} |
427 |
|
} |
428 |
|
|
429 |
|
/** |
430 |
< |
* |
430 |
> |
* iterator ordering is FIFO |
431 |
|
*/ |
432 |
|
public void testIteratorOrdering() { |
433 |
|
final ConcurrentLinkedQueue q = new ConcurrentLinkedQueue(); |
437 |
|
|
438 |
|
int k = 0; |
439 |
|
for (Iterator it = q.iterator(); it.hasNext();) { |
440 |
< |
int i = ((Integer)(it.next())).intValue(); |
407 |
< |
assertEquals(++k, i); |
440 |
> |
assertEquals(++k, it.next()); |
441 |
|
} |
442 |
|
|
443 |
|
assertEquals(3, k); |
444 |
|
} |
445 |
|
|
446 |
|
/** |
447 |
< |
* |
447 |
> |
* Modifications do not cause iterators to fail |
448 |
|
*/ |
449 |
|
public void testWeaklyConsistentIteration () { |
450 |
|
final ConcurrentLinkedQueue q = new ConcurrentLinkedQueue(); |
452 |
|
q.add(two); |
453 |
|
q.add(three); |
454 |
|
|
455 |
< |
try { |
456 |
< |
for (Iterator it = q.iterator(); it.hasNext();) { |
457 |
< |
q.remove(); |
425 |
< |
it.next(); |
426 |
< |
} |
427 |
< |
} |
428 |
< |
catch (ConcurrentModificationException e) { |
429 |
< |
shouldThrow(); |
455 |
> |
for (Iterator it = q.iterator(); it.hasNext();) { |
456 |
> |
q.remove(); |
457 |
> |
it.next(); |
458 |
|
} |
459 |
|
|
460 |
|
assertEquals("queue should be empty again", 0, q.size()); |
461 |
|
} |
462 |
|
|
463 |
|
/** |
464 |
< |
* |
464 |
> |
* iterator.remove removes current element |
465 |
|
*/ |
466 |
|
public void testIteratorRemove () { |
467 |
|
final ConcurrentLinkedQueue q = new ConcurrentLinkedQueue(); |
472 |
|
it.next(); |
473 |
|
it.remove(); |
474 |
|
it = q.iterator(); |
475 |
< |
assertEquals(it.next(), two); |
476 |
< |
assertEquals(it.next(), three); |
475 |
> |
assertSame(it.next(), two); |
476 |
> |
assertSame(it.next(), three); |
477 |
|
assertFalse(it.hasNext()); |
478 |
|
} |
479 |
|
|
480 |
|
|
481 |
|
/** |
482 |
< |
* |
482 |
> |
* toString contains toStrings of elements |
483 |
|
*/ |
484 |
|
public void testToString() { |
485 |
|
ConcurrentLinkedQueue q = populatedQueue(SIZE); |
487 |
|
for (int i = 0; i < SIZE; ++i) { |
488 |
|
assertTrue(s.indexOf(String.valueOf(i)) >= 0); |
489 |
|
} |
490 |
< |
} |
490 |
> |
} |
491 |
|
|
492 |
|
/** |
493 |
< |
* |
493 |
> |
* A deserialized serialized queue has same elements in same order |
494 |
|
*/ |
495 |
< |
public void testSerialization() { |
495 |
> |
public void testSerialization() throws Exception { |
496 |
|
ConcurrentLinkedQueue q = populatedQueue(SIZE); |
497 |
< |
try { |
498 |
< |
ByteArrayOutputStream bout = new ByteArrayOutputStream(10000); |
499 |
< |
ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout)); |
500 |
< |
out.writeObject(q); |
501 |
< |
out.close(); |
502 |
< |
|
503 |
< |
ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray()); |
504 |
< |
ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin)); |
505 |
< |
ConcurrentLinkedQueue r = (ConcurrentLinkedQueue)in.readObject(); |
506 |
< |
assertEquals(q.size(), r.size()); |
507 |
< |
while (!q.isEmpty()) |
480 |
< |
assertEquals(q.remove(), r.remove()); |
481 |
< |
} catch(Exception e){ |
482 |
< |
unexpectedException(); |
483 |
< |
} |
497 |
> |
ByteArrayOutputStream bout = new ByteArrayOutputStream(10000); |
498 |
> |
ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout)); |
499 |
> |
out.writeObject(q); |
500 |
> |
out.close(); |
501 |
> |
|
502 |
> |
ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray()); |
503 |
> |
ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin)); |
504 |
> |
ConcurrentLinkedQueue r = (ConcurrentLinkedQueue)in.readObject(); |
505 |
> |
assertEquals(q.size(), r.size()); |
506 |
> |
while (!q.isEmpty()) |
507 |
> |
assertEquals(q.remove(), r.remove()); |
508 |
|
} |
509 |
|
|
510 |
|
} |