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 static java.util.concurrent.TimeUnit.MILLISECONDS; |
13 |
import java.io.*; |
14 |
|
15 |
public class PriorityBlockingQueueTest extends JSR166TestCase { |
16 |
|
17 |
public static class Generic extends BlockingQueueTest { |
18 |
protected BlockingQueue emptyCollection() { |
19 |
return new PriorityBlockingQueue(); |
20 |
} |
21 |
} |
22 |
|
23 |
public static class InitialCapacity extends BlockingQueueTest { |
24 |
protected BlockingQueue emptyCollection() { |
25 |
return new PriorityBlockingQueue(20); |
26 |
} |
27 |
} |
28 |
|
29 |
public static void main(String[] args) { |
30 |
junit.textui.TestRunner.run(suite()); |
31 |
} |
32 |
|
33 |
public static Test suite() { |
34 |
return newTestSuite(PriorityBlockingQueueTest.class, |
35 |
new Generic().testSuite(), |
36 |
new InitialCapacity().testSuite()); |
37 |
} |
38 |
|
39 |
private static final int NOCAP = Integer.MAX_VALUE; |
40 |
|
41 |
/** Sample Comparator */ |
42 |
static class MyReverseComparator implements Comparator { |
43 |
public int compare(Object x, Object y) { |
44 |
return ((Comparable)y).compareTo(x); |
45 |
} |
46 |
} |
47 |
|
48 |
/** |
49 |
* Create a queue of given size containing consecutive |
50 |
* Integers 0 ... n. |
51 |
*/ |
52 |
private PriorityBlockingQueue populatedQueue(int n) { |
53 |
PriorityBlockingQueue q = new PriorityBlockingQueue(n); |
54 |
assertTrue(q.isEmpty()); |
55 |
for (int i = n-1; i >= 0; i-=2) |
56 |
assertTrue(q.offer(new Integer(i))); |
57 |
for (int i = (n & 1); i < n; i+=2) |
58 |
assertTrue(q.offer(new Integer(i))); |
59 |
assertFalse(q.isEmpty()); |
60 |
assertEquals(NOCAP, q.remainingCapacity()); |
61 |
assertEquals(n, q.size()); |
62 |
return q; |
63 |
} |
64 |
|
65 |
/** |
66 |
* A new queue has unbounded capacity |
67 |
*/ |
68 |
public void testConstructor1() { |
69 |
assertEquals(NOCAP, new PriorityBlockingQueue(SIZE).remainingCapacity()); |
70 |
} |
71 |
|
72 |
/** |
73 |
* Constructor throws IAE if capacity argument nonpositive |
74 |
*/ |
75 |
public void testConstructor2() { |
76 |
try { |
77 |
PriorityBlockingQueue q = new PriorityBlockingQueue(0); |
78 |
shouldThrow(); |
79 |
} catch (IllegalArgumentException success) {} |
80 |
} |
81 |
|
82 |
/** |
83 |
* Initializing from null Collection throws NPE |
84 |
*/ |
85 |
public void testConstructor3() { |
86 |
try { |
87 |
PriorityBlockingQueue q = new PriorityBlockingQueue(null); |
88 |
shouldThrow(); |
89 |
} catch (NullPointerException success) {} |
90 |
} |
91 |
|
92 |
/** |
93 |
* Initializing from Collection of null elements throws NPE |
94 |
*/ |
95 |
public void testConstructor4() { |
96 |
try { |
97 |
Integer[] ints = new Integer[SIZE]; |
98 |
PriorityBlockingQueue q = new PriorityBlockingQueue(Arrays.asList(ints)); |
99 |
shouldThrow(); |
100 |
} catch (NullPointerException success) {} |
101 |
} |
102 |
|
103 |
/** |
104 |
* Initializing from Collection with some null elements throws NPE |
105 |
*/ |
106 |
public void testConstructor5() { |
107 |
try { |
108 |
Integer[] ints = new Integer[SIZE]; |
109 |
for (int i = 0; i < SIZE-1; ++i) |
110 |
ints[i] = new Integer(i); |
111 |
PriorityBlockingQueue q = new PriorityBlockingQueue(Arrays.asList(ints)); |
112 |
shouldThrow(); |
113 |
} catch (NullPointerException success) {} |
114 |
} |
115 |
|
116 |
/** |
117 |
* Queue contains all elements of collection used to initialize |
118 |
*/ |
119 |
public void testConstructor6() { |
120 |
Integer[] ints = new Integer[SIZE]; |
121 |
for (int i = 0; i < SIZE; ++i) |
122 |
ints[i] = new Integer(i); |
123 |
PriorityBlockingQueue q = new PriorityBlockingQueue(Arrays.asList(ints)); |
124 |
for (int i = 0; i < SIZE; ++i) |
125 |
assertEquals(ints[i], q.poll()); |
126 |
} |
127 |
|
128 |
/** |
129 |
* The comparator used in constructor is used |
130 |
*/ |
131 |
public void testConstructor7() { |
132 |
MyReverseComparator cmp = new MyReverseComparator(); |
133 |
PriorityBlockingQueue q = new PriorityBlockingQueue(SIZE, cmp); |
134 |
assertEquals(cmp, q.comparator()); |
135 |
Integer[] ints = new Integer[SIZE]; |
136 |
for (int i = 0; i < SIZE; ++i) |
137 |
ints[i] = new Integer(i); |
138 |
q.addAll(Arrays.asList(ints)); |
139 |
for (int i = SIZE-1; i >= 0; --i) |
140 |
assertEquals(ints[i], q.poll()); |
141 |
} |
142 |
|
143 |
/** |
144 |
* isEmpty is true before add, false after |
145 |
*/ |
146 |
public void testEmpty() { |
147 |
PriorityBlockingQueue q = new PriorityBlockingQueue(2); |
148 |
assertTrue(q.isEmpty()); |
149 |
assertEquals(NOCAP, q.remainingCapacity()); |
150 |
q.add(one); |
151 |
assertFalse(q.isEmpty()); |
152 |
q.add(two); |
153 |
q.remove(); |
154 |
q.remove(); |
155 |
assertTrue(q.isEmpty()); |
156 |
} |
157 |
|
158 |
/** |
159 |
* remainingCapacity does not change when elements added or removed, |
160 |
* but size does |
161 |
*/ |
162 |
public void testRemainingCapacity() { |
163 |
PriorityBlockingQueue q = populatedQueue(SIZE); |
164 |
for (int i = 0; i < SIZE; ++i) { |
165 |
assertEquals(NOCAP, q.remainingCapacity()); |
166 |
assertEquals(SIZE-i, q.size()); |
167 |
q.remove(); |
168 |
} |
169 |
for (int i = 0; i < SIZE; ++i) { |
170 |
assertEquals(NOCAP, q.remainingCapacity()); |
171 |
assertEquals(i, q.size()); |
172 |
q.add(new Integer(i)); |
173 |
} |
174 |
} |
175 |
|
176 |
/** |
177 |
* offer(null) throws NPE |
178 |
*/ |
179 |
public void testOfferNull() { |
180 |
try { |
181 |
PriorityBlockingQueue q = new PriorityBlockingQueue(1); |
182 |
q.offer(null); |
183 |
shouldThrow(); |
184 |
} catch (NullPointerException success) {} |
185 |
} |
186 |
|
187 |
/** |
188 |
* add(null) throws NPE |
189 |
*/ |
190 |
public void testAddNull() { |
191 |
try { |
192 |
PriorityBlockingQueue q = new PriorityBlockingQueue(1); |
193 |
q.add(null); |
194 |
shouldThrow(); |
195 |
} catch (NullPointerException success) {} |
196 |
} |
197 |
|
198 |
/** |
199 |
* Offer of comparable element succeeds |
200 |
*/ |
201 |
public void testOffer() { |
202 |
PriorityBlockingQueue q = new PriorityBlockingQueue(1); |
203 |
assertTrue(q.offer(zero)); |
204 |
assertTrue(q.offer(one)); |
205 |
} |
206 |
|
207 |
/** |
208 |
* Offer of non-Comparable throws CCE |
209 |
*/ |
210 |
public void testOfferNonComparable() { |
211 |
try { |
212 |
PriorityBlockingQueue q = new PriorityBlockingQueue(1); |
213 |
q.offer(new Object()); |
214 |
q.offer(new Object()); |
215 |
q.offer(new Object()); |
216 |
shouldThrow(); |
217 |
} catch (ClassCastException success) {} |
218 |
} |
219 |
|
220 |
/** |
221 |
* add of comparable succeeds |
222 |
*/ |
223 |
public void testAdd() { |
224 |
PriorityBlockingQueue q = new PriorityBlockingQueue(SIZE); |
225 |
for (int i = 0; i < SIZE; ++i) { |
226 |
assertEquals(i, q.size()); |
227 |
assertTrue(q.add(new Integer(i))); |
228 |
} |
229 |
} |
230 |
|
231 |
/** |
232 |
* addAll(null) throws NPE |
233 |
*/ |
234 |
public void testAddAll1() { |
235 |
try { |
236 |
PriorityBlockingQueue q = new PriorityBlockingQueue(1); |
237 |
q.addAll(null); |
238 |
shouldThrow(); |
239 |
} catch (NullPointerException success) {} |
240 |
} |
241 |
|
242 |
/** |
243 |
* addAll(this) throws IAE |
244 |
*/ |
245 |
public void testAddAllSelf() { |
246 |
try { |
247 |
PriorityBlockingQueue q = populatedQueue(SIZE); |
248 |
q.addAll(q); |
249 |
shouldThrow(); |
250 |
} catch (IllegalArgumentException success) {} |
251 |
} |
252 |
|
253 |
/** |
254 |
* addAll of a collection with null elements throws NPE |
255 |
*/ |
256 |
public void testAddAll2() { |
257 |
try { |
258 |
PriorityBlockingQueue q = new PriorityBlockingQueue(SIZE); |
259 |
Integer[] ints = new Integer[SIZE]; |
260 |
q.addAll(Arrays.asList(ints)); |
261 |
shouldThrow(); |
262 |
} catch (NullPointerException success) {} |
263 |
} |
264 |
|
265 |
/** |
266 |
* addAll of a collection with any null elements throws NPE after |
267 |
* possibly adding some elements |
268 |
*/ |
269 |
public void testAddAll3() { |
270 |
try { |
271 |
PriorityBlockingQueue q = new PriorityBlockingQueue(SIZE); |
272 |
Integer[] ints = new Integer[SIZE]; |
273 |
for (int i = 0; i < SIZE-1; ++i) |
274 |
ints[i] = new Integer(i); |
275 |
q.addAll(Arrays.asList(ints)); |
276 |
shouldThrow(); |
277 |
} catch (NullPointerException success) {} |
278 |
} |
279 |
|
280 |
/** |
281 |
* Queue contains all elements of successful addAll |
282 |
*/ |
283 |
public void testAddAll5() { |
284 |
Integer[] empty = new Integer[0]; |
285 |
Integer[] ints = new Integer[SIZE]; |
286 |
for (int i = SIZE-1; i >= 0; --i) |
287 |
ints[i] = new Integer(i); |
288 |
PriorityBlockingQueue q = new PriorityBlockingQueue(SIZE); |
289 |
assertFalse(q.addAll(Arrays.asList(empty))); |
290 |
assertTrue(q.addAll(Arrays.asList(ints))); |
291 |
for (int i = 0; i < SIZE; ++i) |
292 |
assertEquals(ints[i], q.poll()); |
293 |
} |
294 |
|
295 |
/** |
296 |
* put(null) throws NPE |
297 |
*/ |
298 |
public void testPutNull() { |
299 |
try { |
300 |
PriorityBlockingQueue q = new PriorityBlockingQueue(SIZE); |
301 |
q.put(null); |
302 |
shouldThrow(); |
303 |
} catch (NullPointerException success) {} |
304 |
} |
305 |
|
306 |
/** |
307 |
* all elements successfully put are contained |
308 |
*/ |
309 |
public void testPut() { |
310 |
PriorityBlockingQueue q = new PriorityBlockingQueue(SIZE); |
311 |
for (int i = 0; i < SIZE; ++i) { |
312 |
Integer I = new Integer(i); |
313 |
q.put(I); |
314 |
assertTrue(q.contains(I)); |
315 |
} |
316 |
assertEquals(SIZE, q.size()); |
317 |
} |
318 |
|
319 |
/** |
320 |
* put doesn't block waiting for take |
321 |
*/ |
322 |
public void testPutWithTake() throws InterruptedException { |
323 |
final PriorityBlockingQueue q = new PriorityBlockingQueue(2); |
324 |
final int size = 4; |
325 |
Thread t = new Thread(new CheckedRunnable() { |
326 |
public void realRun() { |
327 |
for (int i = 0; i < size; i++) |
328 |
q.put(new Integer(0)); |
329 |
}}); |
330 |
|
331 |
t.start(); |
332 |
Thread.sleep(SHORT_DELAY_MS); |
333 |
assertEquals(q.size(), size); |
334 |
q.take(); |
335 |
t.interrupt(); |
336 |
t.join(); |
337 |
} |
338 |
|
339 |
/** |
340 |
* timed offer does not time out |
341 |
*/ |
342 |
public void testTimedOffer() throws InterruptedException { |
343 |
final PriorityBlockingQueue q = new PriorityBlockingQueue(2); |
344 |
Thread t = new Thread(new CheckedRunnable() { |
345 |
public void realRun() { |
346 |
q.put(new Integer(0)); |
347 |
q.put(new Integer(0)); |
348 |
assertTrue(q.offer(new Integer(0), SHORT_DELAY_MS, MILLISECONDS)); |
349 |
assertTrue(q.offer(new Integer(0), LONG_DELAY_MS, MILLISECONDS)); |
350 |
}}); |
351 |
|
352 |
t.start(); |
353 |
Thread.sleep(SMALL_DELAY_MS); |
354 |
t.interrupt(); |
355 |
t.join(); |
356 |
} |
357 |
|
358 |
/** |
359 |
* take retrieves elements in priority order |
360 |
*/ |
361 |
public void testTake() throws InterruptedException { |
362 |
PriorityBlockingQueue q = populatedQueue(SIZE); |
363 |
for (int i = 0; i < SIZE; ++i) { |
364 |
assertEquals(i, q.take()); |
365 |
} |
366 |
} |
367 |
|
368 |
/** |
369 |
* take blocks interruptibly when empty |
370 |
*/ |
371 |
public void testTakeFromEmpty() throws InterruptedException { |
372 |
final PriorityBlockingQueue q = new PriorityBlockingQueue(2); |
373 |
Thread t = new Thread(new CheckedInterruptedRunnable() { |
374 |
public void realRun() throws InterruptedException { |
375 |
q.take(); |
376 |
}}); |
377 |
|
378 |
t.start(); |
379 |
Thread.sleep(SHORT_DELAY_MS); |
380 |
t.interrupt(); |
381 |
t.join(); |
382 |
} |
383 |
|
384 |
/** |
385 |
* Take removes existing elements until empty, then blocks interruptibly |
386 |
*/ |
387 |
public void testBlockingTake() throws InterruptedException { |
388 |
final PriorityBlockingQueue q = populatedQueue(SIZE); |
389 |
Thread t = new Thread(new CheckedRunnable() { |
390 |
public void realRun() throws InterruptedException { |
391 |
for (int i = 0; i < SIZE; ++i) { |
392 |
assertEquals(i, q.take()); |
393 |
} |
394 |
try { |
395 |
q.take(); |
396 |
shouldThrow(); |
397 |
} catch (InterruptedException success) {} |
398 |
}}); |
399 |
|
400 |
t.start(); |
401 |
Thread.sleep(SHORT_DELAY_MS); |
402 |
t.interrupt(); |
403 |
t.join(); |
404 |
} |
405 |
|
406 |
|
407 |
/** |
408 |
* poll succeeds unless empty |
409 |
*/ |
410 |
public void testPoll() { |
411 |
PriorityBlockingQueue q = populatedQueue(SIZE); |
412 |
for (int i = 0; i < SIZE; ++i) { |
413 |
assertEquals(i, q.poll()); |
414 |
} |
415 |
assertNull(q.poll()); |
416 |
} |
417 |
|
418 |
/** |
419 |
* timed pool with zero timeout succeeds when non-empty, else times out |
420 |
*/ |
421 |
public void testTimedPoll0() throws InterruptedException { |
422 |
PriorityBlockingQueue q = populatedQueue(SIZE); |
423 |
for (int i = 0; i < SIZE; ++i) { |
424 |
assertEquals(i, q.poll(0, MILLISECONDS)); |
425 |
} |
426 |
assertNull(q.poll(0, MILLISECONDS)); |
427 |
} |
428 |
|
429 |
/** |
430 |
* timed pool with nonzero timeout succeeds when non-empty, else times out |
431 |
*/ |
432 |
public void testTimedPoll() throws InterruptedException { |
433 |
PriorityBlockingQueue q = populatedQueue(SIZE); |
434 |
for (int i = 0; i < SIZE; ++i) { |
435 |
assertEquals(i, q.poll(SHORT_DELAY_MS, MILLISECONDS)); |
436 |
} |
437 |
assertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS)); |
438 |
} |
439 |
|
440 |
/** |
441 |
* Interrupted timed poll throws InterruptedException instead of |
442 |
* returning timeout status |
443 |
*/ |
444 |
public void testInterruptedTimedPoll() throws InterruptedException { |
445 |
Thread t = new Thread(new CheckedRunnable() { |
446 |
public void realRun() throws InterruptedException { |
447 |
PriorityBlockingQueue q = populatedQueue(SIZE); |
448 |
for (int i = 0; i < SIZE; ++i) { |
449 |
assertEquals(i, q.poll(SHORT_DELAY_MS, MILLISECONDS)); |
450 |
} |
451 |
try { |
452 |
q.poll(SMALL_DELAY_MS, MILLISECONDS); |
453 |
shouldThrow(); |
454 |
} catch (InterruptedException success) {} |
455 |
}}); |
456 |
|
457 |
t.start(); |
458 |
Thread.sleep(SHORT_DELAY_MS); |
459 |
t.interrupt(); |
460 |
t.join(); |
461 |
} |
462 |
|
463 |
/** |
464 |
* peek returns next element, or null if empty |
465 |
*/ |
466 |
public void testPeek() { |
467 |
PriorityBlockingQueue q = populatedQueue(SIZE); |
468 |
for (int i = 0; i < SIZE; ++i) { |
469 |
assertEquals(i, q.peek()); |
470 |
assertEquals(i, q.poll()); |
471 |
assertTrue(q.peek() == null || |
472 |
!q.peek().equals(i)); |
473 |
} |
474 |
assertNull(q.peek()); |
475 |
} |
476 |
|
477 |
/** |
478 |
* element returns next element, or throws NSEE if empty |
479 |
*/ |
480 |
public void testElement() { |
481 |
PriorityBlockingQueue q = populatedQueue(SIZE); |
482 |
for (int i = 0; i < SIZE; ++i) { |
483 |
assertEquals(i, q.element()); |
484 |
assertEquals(i, q.poll()); |
485 |
} |
486 |
try { |
487 |
q.element(); |
488 |
shouldThrow(); |
489 |
} catch (NoSuchElementException success) {} |
490 |
} |
491 |
|
492 |
/** |
493 |
* remove removes next element, or throws NSEE if empty |
494 |
*/ |
495 |
public void testRemove() { |
496 |
PriorityBlockingQueue q = populatedQueue(SIZE); |
497 |
for (int i = 0; i < SIZE; ++i) { |
498 |
assertEquals(i, q.remove()); |
499 |
} |
500 |
try { |
501 |
q.remove(); |
502 |
shouldThrow(); |
503 |
} catch (NoSuchElementException success) {} |
504 |
} |
505 |
|
506 |
/** |
507 |
* remove(x) removes x and returns true if present |
508 |
*/ |
509 |
public void testRemoveElement() { |
510 |
PriorityBlockingQueue q = populatedQueue(SIZE); |
511 |
for (int i = 1; i < SIZE; i+=2) { |
512 |
assertTrue(q.remove(new Integer(i))); |
513 |
} |
514 |
for (int i = 0; i < SIZE; i+=2) { |
515 |
assertTrue(q.remove(new Integer(i))); |
516 |
assertFalse(q.remove(new Integer(i+1))); |
517 |
} |
518 |
assertTrue(q.isEmpty()); |
519 |
} |
520 |
|
521 |
/** |
522 |
* contains(x) reports true when elements added but not yet removed |
523 |
*/ |
524 |
public void testContains() { |
525 |
PriorityBlockingQueue q = populatedQueue(SIZE); |
526 |
for (int i = 0; i < SIZE; ++i) { |
527 |
assertTrue(q.contains(new Integer(i))); |
528 |
q.poll(); |
529 |
assertFalse(q.contains(new Integer(i))); |
530 |
} |
531 |
} |
532 |
|
533 |
/** |
534 |
* clear removes all elements |
535 |
*/ |
536 |
public void testClear() { |
537 |
PriorityBlockingQueue q = populatedQueue(SIZE); |
538 |
q.clear(); |
539 |
assertTrue(q.isEmpty()); |
540 |
assertEquals(0, q.size()); |
541 |
q.add(one); |
542 |
assertFalse(q.isEmpty()); |
543 |
assertTrue(q.contains(one)); |
544 |
q.clear(); |
545 |
assertTrue(q.isEmpty()); |
546 |
} |
547 |
|
548 |
/** |
549 |
* containsAll(c) is true when c contains a subset of elements |
550 |
*/ |
551 |
public void testContainsAll() { |
552 |
PriorityBlockingQueue q = populatedQueue(SIZE); |
553 |
PriorityBlockingQueue p = new PriorityBlockingQueue(SIZE); |
554 |
for (int i = 0; i < SIZE; ++i) { |
555 |
assertTrue(q.containsAll(p)); |
556 |
assertFalse(p.containsAll(q)); |
557 |
p.add(new Integer(i)); |
558 |
} |
559 |
assertTrue(p.containsAll(q)); |
560 |
} |
561 |
|
562 |
/** |
563 |
* retainAll(c) retains only those elements of c and reports true if changed |
564 |
*/ |
565 |
public void testRetainAll() { |
566 |
PriorityBlockingQueue q = populatedQueue(SIZE); |
567 |
PriorityBlockingQueue p = populatedQueue(SIZE); |
568 |
for (int i = 0; i < SIZE; ++i) { |
569 |
boolean changed = q.retainAll(p); |
570 |
if (i == 0) |
571 |
assertFalse(changed); |
572 |
else |
573 |
assertTrue(changed); |
574 |
|
575 |
assertTrue(q.containsAll(p)); |
576 |
assertEquals(SIZE-i, q.size()); |
577 |
p.remove(); |
578 |
} |
579 |
} |
580 |
|
581 |
/** |
582 |
* removeAll(c) removes only those elements of c and reports true if changed |
583 |
*/ |
584 |
public void testRemoveAll() { |
585 |
for (int i = 1; i < SIZE; ++i) { |
586 |
PriorityBlockingQueue q = populatedQueue(SIZE); |
587 |
PriorityBlockingQueue p = populatedQueue(i); |
588 |
assertTrue(q.removeAll(p)); |
589 |
assertEquals(SIZE-i, q.size()); |
590 |
for (int j = 0; j < i; ++j) { |
591 |
Integer I = (Integer)(p.remove()); |
592 |
assertFalse(q.contains(I)); |
593 |
} |
594 |
} |
595 |
} |
596 |
|
597 |
/** |
598 |
* toArray contains all elements |
599 |
*/ |
600 |
public void testToArray() throws InterruptedException { |
601 |
PriorityBlockingQueue q = populatedQueue(SIZE); |
602 |
Object[] o = q.toArray(); |
603 |
Arrays.sort(o); |
604 |
for (int i = 0; i < o.length; i++) |
605 |
assertEquals(o[i], q.take()); |
606 |
} |
607 |
|
608 |
/** |
609 |
* toArray(a) contains all elements |
610 |
*/ |
611 |
public void testToArray2() throws InterruptedException { |
612 |
PriorityBlockingQueue q = populatedQueue(SIZE); |
613 |
Integer[] ints = new Integer[SIZE]; |
614 |
ints = (Integer[])q.toArray(ints); |
615 |
Arrays.sort(ints); |
616 |
for (int i = 0; i < ints.length; i++) |
617 |
assertEquals(ints[i], q.take()); |
618 |
} |
619 |
|
620 |
/** |
621 |
* toArray(null) throws NPE |
622 |
*/ |
623 |
public void testToArray_BadArg() { |
624 |
PriorityBlockingQueue q = populatedQueue(SIZE); |
625 |
try { |
626 |
Object o[] = q.toArray(null); |
627 |
shouldThrow(); |
628 |
} catch (NullPointerException success) {} |
629 |
} |
630 |
|
631 |
/** |
632 |
* toArray with incompatible array type throws CCE |
633 |
*/ |
634 |
public void testToArray1_BadArg() { |
635 |
PriorityBlockingQueue q = populatedQueue(SIZE); |
636 |
try { |
637 |
Object o[] = q.toArray(new String[10]); |
638 |
shouldThrow(); |
639 |
} catch (ArrayStoreException success) {} |
640 |
} |
641 |
|
642 |
/** |
643 |
* iterator iterates through all elements |
644 |
*/ |
645 |
public void testIterator() { |
646 |
PriorityBlockingQueue q = populatedQueue(SIZE); |
647 |
int i = 0; |
648 |
Iterator it = q.iterator(); |
649 |
while (it.hasNext()) { |
650 |
assertTrue(q.contains(it.next())); |
651 |
++i; |
652 |
} |
653 |
assertEquals(i, SIZE); |
654 |
} |
655 |
|
656 |
/** |
657 |
* iterator.remove removes current element |
658 |
*/ |
659 |
public void testIteratorRemove() { |
660 |
final PriorityBlockingQueue q = new PriorityBlockingQueue(3); |
661 |
q.add(new Integer(2)); |
662 |
q.add(new Integer(1)); |
663 |
q.add(new Integer(3)); |
664 |
|
665 |
Iterator it = q.iterator(); |
666 |
it.next(); |
667 |
it.remove(); |
668 |
|
669 |
it = q.iterator(); |
670 |
assertEquals(it.next(), new Integer(2)); |
671 |
assertEquals(it.next(), new Integer(3)); |
672 |
assertFalse(it.hasNext()); |
673 |
} |
674 |
|
675 |
|
676 |
/** |
677 |
* toString contains toStrings of elements |
678 |
*/ |
679 |
public void testToString() { |
680 |
PriorityBlockingQueue q = populatedQueue(SIZE); |
681 |
String s = q.toString(); |
682 |
for (int i = 0; i < SIZE; ++i) { |
683 |
assertTrue(s.indexOf(String.valueOf(i)) >= 0); |
684 |
} |
685 |
} |
686 |
|
687 |
/** |
688 |
* offer transfers elements across Executor tasks |
689 |
*/ |
690 |
public void testPollInExecutor() { |
691 |
final PriorityBlockingQueue q = new PriorityBlockingQueue(2); |
692 |
ExecutorService executor = Executors.newFixedThreadPool(2); |
693 |
executor.execute(new CheckedRunnable() { |
694 |
public void realRun() throws InterruptedException { |
695 |
assertNull(q.poll()); |
696 |
assertSame(one, q.poll(MEDIUM_DELAY_MS, MILLISECONDS)); |
697 |
assertTrue(q.isEmpty()); |
698 |
}}); |
699 |
|
700 |
executor.execute(new CheckedRunnable() { |
701 |
public void realRun() throws InterruptedException { |
702 |
Thread.sleep(SMALL_DELAY_MS); |
703 |
q.put(one); |
704 |
}}); |
705 |
|
706 |
joinPool(executor); |
707 |
} |
708 |
|
709 |
/** |
710 |
* A deserialized serialized queue has same elements |
711 |
*/ |
712 |
public void testSerialization() throws Exception { |
713 |
PriorityBlockingQueue q = populatedQueue(SIZE); |
714 |
ByteArrayOutputStream bout = new ByteArrayOutputStream(10000); |
715 |
ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout)); |
716 |
out.writeObject(q); |
717 |
out.close(); |
718 |
|
719 |
ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray()); |
720 |
ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin)); |
721 |
PriorityBlockingQueue r = (PriorityBlockingQueue)in.readObject(); |
722 |
assertEquals(q.size(), r.size()); |
723 |
while (!q.isEmpty()) |
724 |
assertEquals(q.remove(), r.remove()); |
725 |
} |
726 |
|
727 |
/** |
728 |
* drainTo(null) throws NPE |
729 |
*/ |
730 |
public void testDrainToNull() { |
731 |
PriorityBlockingQueue q = populatedQueue(SIZE); |
732 |
try { |
733 |
q.drainTo(null); |
734 |
shouldThrow(); |
735 |
} catch (NullPointerException success) {} |
736 |
} |
737 |
|
738 |
/** |
739 |
* drainTo(this) throws IAE |
740 |
*/ |
741 |
public void testDrainToSelf() { |
742 |
PriorityBlockingQueue q = populatedQueue(SIZE); |
743 |
try { |
744 |
q.drainTo(q); |
745 |
shouldThrow(); |
746 |
} catch (IllegalArgumentException success) {} |
747 |
} |
748 |
|
749 |
/** |
750 |
* drainTo(c) empties queue into another collection c |
751 |
*/ |
752 |
public void testDrainTo() { |
753 |
PriorityBlockingQueue q = populatedQueue(SIZE); |
754 |
ArrayList l = new ArrayList(); |
755 |
q.drainTo(l); |
756 |
assertEquals(q.size(), 0); |
757 |
assertEquals(l.size(), SIZE); |
758 |
for (int i = 0; i < SIZE; ++i) |
759 |
assertEquals(l.get(i), new Integer(i)); |
760 |
q.add(zero); |
761 |
q.add(one); |
762 |
assertFalse(q.isEmpty()); |
763 |
assertTrue(q.contains(zero)); |
764 |
assertTrue(q.contains(one)); |
765 |
l.clear(); |
766 |
q.drainTo(l); |
767 |
assertEquals(q.size(), 0); |
768 |
assertEquals(l.size(), 2); |
769 |
for (int i = 0; i < 2; ++i) |
770 |
assertEquals(l.get(i), new Integer(i)); |
771 |
} |
772 |
|
773 |
/** |
774 |
* drainTo empties queue |
775 |
*/ |
776 |
public void testDrainToWithActivePut() throws InterruptedException { |
777 |
final PriorityBlockingQueue q = populatedQueue(SIZE); |
778 |
Thread t = new Thread(new CheckedRunnable() { |
779 |
public void realRun() { |
780 |
q.put(new Integer(SIZE+1)); |
781 |
}}); |
782 |
|
783 |
t.start(); |
784 |
ArrayList l = new ArrayList(); |
785 |
q.drainTo(l); |
786 |
assertTrue(l.size() >= SIZE); |
787 |
for (int i = 0; i < SIZE; ++i) |
788 |
assertEquals(l.get(i), new Integer(i)); |
789 |
t.join(); |
790 |
assertTrue(q.size() + l.size() >= SIZE); |
791 |
} |
792 |
|
793 |
/** |
794 |
* drainTo(null, n) throws NPE |
795 |
*/ |
796 |
public void testDrainToNullN() { |
797 |
PriorityBlockingQueue q = populatedQueue(SIZE); |
798 |
try { |
799 |
q.drainTo(null, 0); |
800 |
shouldThrow(); |
801 |
} catch (NullPointerException success) {} |
802 |
} |
803 |
|
804 |
/** |
805 |
* drainTo(this, n) throws IAE |
806 |
*/ |
807 |
public void testDrainToSelfN() { |
808 |
PriorityBlockingQueue q = populatedQueue(SIZE); |
809 |
try { |
810 |
q.drainTo(q, 0); |
811 |
shouldThrow(); |
812 |
} catch (IllegalArgumentException success) {} |
813 |
} |
814 |
|
815 |
/** |
816 |
* drainTo(c, n) empties first max {n, size} elements of queue into c |
817 |
*/ |
818 |
public void testDrainToN() { |
819 |
PriorityBlockingQueue q = new PriorityBlockingQueue(SIZE*2); |
820 |
for (int i = 0; i < SIZE + 2; ++i) { |
821 |
for (int j = 0; j < SIZE; j++) |
822 |
assertTrue(q.offer(new Integer(j))); |
823 |
ArrayList l = new ArrayList(); |
824 |
q.drainTo(l, i); |
825 |
int k = (i < SIZE)? i : SIZE; |
826 |
assertEquals(l.size(), k); |
827 |
assertEquals(q.size(), SIZE-k); |
828 |
for (int j = 0; j < k; ++j) |
829 |
assertEquals(l.get(j), new Integer(j)); |
830 |
while (q.poll() != null) ; |
831 |
} |
832 |
} |
833 |
|
834 |
} |