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1 : dl 1.1 /*
2 : dl 1.7 * 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 : jsr166 1.12 * Other contributors include Andrew Wright, Jeffrey Hayes,
6 :     * Pat Fisher, Mike Judd.
7 : dl 1.1 */
8 :    
9 : dl 1.4
10 : dl 1.1 import junit.framework.*;
11 :     import java.util.*;
12 :     import java.util.concurrent.*;
13 : jsr166 1.16 import static java.util.concurrent.TimeUnit.MILLISECONDS;
14 : dl 1.2 import java.io.*;
15 : dl 1.1
16 : dl 1.3 public class ArrayBlockingQueueTest extends JSR166TestCase {
17 : dl 1.1 public static void main(String[] args) {
18 : jsr166 1.15 junit.textui.TestRunner.run (suite());
19 : dl 1.1 }
20 :     public static Test suite() {
21 : jsr166 1.15 return new TestSuite(ArrayBlockingQueueTest.class);
22 : dl 1.1 }
23 :    
24 :     /**
25 :     * Create a queue of given size containing consecutive
26 :     * Integers 0 ... n.
27 :     */
28 : dl 1.3 private ArrayBlockingQueue populatedQueue(int n) {
29 : dl 1.1 ArrayBlockingQueue q = new ArrayBlockingQueue(n);
30 :     assertTrue(q.isEmpty());
31 : jsr166 1.15 for (int i = 0; i < n; i++)
32 :     assertTrue(q.offer(new Integer(i)));
33 : dl 1.1 assertFalse(q.isEmpty());
34 :     assertEquals(0, q.remainingCapacity());
35 : jsr166 1.15 assertEquals(n, q.size());
36 : dl 1.1 return q;
37 :     }
38 : jsr166 1.12
39 : dl 1.4 /**
40 : dl 1.5 * A new queue has the indicated capacity
41 : dl 1.4 */
42 :     public void testConstructor1() {
43 : dl 1.3 assertEquals(SIZE, new ArrayBlockingQueue(SIZE).remainingCapacity());
44 : dl 1.1 }
45 :    
46 : dl 1.4 /**
47 : jsr166 1.18 * Constructor throws IAE if capacity argument nonpositive
48 : dl 1.4 */
49 :     public void testConstructor2() {
50 : dl 1.1 try {
51 :     ArrayBlockingQueue q = new ArrayBlockingQueue(0);
52 : dl 1.4 shouldThrow();
53 : jsr166 1.17 } catch (IllegalArgumentException success) {}
54 : dl 1.1 }
55 :    
56 : dl 1.4 /**
57 : dl 1.5 * Initializing from null Collection throws NPE
58 : dl 1.4 */
59 :     public void testConstructor3() {
60 : dl 1.1 try {
61 :     ArrayBlockingQueue q = new ArrayBlockingQueue(1, true, null);
62 : dl 1.4 shouldThrow();
63 : jsr166 1.17 } catch (NullPointerException success) {}
64 : dl 1.1 }
65 :    
66 : dl 1.4 /**
67 : dl 1.5 * Initializing from Collection of null elements throws NPE
68 : dl 1.4 */
69 :     public void testConstructor4() {
70 : dl 1.1 try {
71 : dl 1.3 Integer[] ints = new Integer[SIZE];
72 :     ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE, false, Arrays.asList(ints));
73 : dl 1.4 shouldThrow();
74 : jsr166 1.17 } catch (NullPointerException success) {}
75 : dl 1.1 }
76 :    
77 : dl 1.4 /**
78 : dl 1.5 * Initializing from Collection with some null elements throws NPE
79 : dl 1.4 */
80 :     public void testConstructor5() {
81 : dl 1.1 try {
82 : dl 1.3 Integer[] ints = new Integer[SIZE];
83 :     for (int i = 0; i < SIZE-1; ++i)
84 : dl 1.1 ints[i] = new Integer(i);
85 : dl 1.3 ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE, false, Arrays.asList(ints));
86 : dl 1.4 shouldThrow();
87 : jsr166 1.17 } catch (NullPointerException success) {}
88 : dl 1.1 }
89 :    
90 : dl 1.4 /**
91 : dl 1.5 * Initializing from too large collection throws IAE
92 : dl 1.4 */
93 :     public void testConstructor6() {
94 : dl 1.1 try {
95 : dl 1.3 Integer[] ints = new Integer[SIZE];
96 :     for (int i = 0; i < SIZE; ++i)
97 : dl 1.1 ints[i] = new Integer(i);
98 :     ArrayBlockingQueue q = new ArrayBlockingQueue(1, false, Arrays.asList(ints));
99 : dl 1.4 shouldThrow();
100 : jsr166 1.17 } catch (IllegalArgumentException success) {}
101 : dl 1.1 }
102 :    
103 : dl 1.4 /**
104 : dl 1.5 * Queue contains all elements of collection used to initialize
105 : dl 1.4 */
106 :     public void testConstructor7() {
107 : jsr166 1.19 Integer[] ints = new Integer[SIZE];
108 :     for (int i = 0; i < SIZE; ++i)
109 :     ints[i] = new Integer(i);
110 :     ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE, true, Arrays.asList(ints));
111 :     for (int i = 0; i < SIZE; ++i)
112 :     assertEquals(ints[i], q.poll());
113 : dl 1.1 }
114 :    
115 : dl 1.4 /**
116 : dl 1.5 * Queue transitions from empty to full when elements added
117 : dl 1.4 */
118 : dl 1.1 public void testEmptyFull() {
119 :     ArrayBlockingQueue q = new ArrayBlockingQueue(2);
120 :     assertTrue(q.isEmpty());
121 : dl 1.4 assertEquals(2, q.remainingCapacity());
122 : dl 1.3 q.add(one);
123 : dl 1.1 assertFalse(q.isEmpty());
124 : dl 1.3 q.add(two);
125 : dl 1.1 assertFalse(q.isEmpty());
126 : dl 1.4 assertEquals(0, q.remainingCapacity());
127 :     assertFalse(q.offer(three));
128 : dl 1.1 }
129 :    
130 : dl 1.4 /**
131 : dl 1.5 * remainingCapacity decreases on add, increases on remove
132 : dl 1.4 */
133 :     public void testRemainingCapacity() {
134 : dl 1.3 ArrayBlockingQueue q = populatedQueue(SIZE);
135 :     for (int i = 0; i < SIZE; ++i) {
136 : dl 1.1 assertEquals(i, q.remainingCapacity());
137 : dl 1.3 assertEquals(SIZE-i, q.size());
138 : dl 1.1 q.remove();
139 :     }
140 : dl 1.3 for (int i = 0; i < SIZE; ++i) {
141 :     assertEquals(SIZE-i, q.remainingCapacity());
142 : dl 1.1 assertEquals(i, q.size());
143 :     q.add(new Integer(i));
144 :     }
145 :     }
146 :    
147 : dl 1.4 /**
148 : dl 1.5 * offer(null) throws NPE
149 : dl 1.4 */
150 :     public void testOfferNull() {
151 : jsr166 1.15 try {
152 : dl 1.1 ArrayBlockingQueue q = new ArrayBlockingQueue(1);
153 :     q.offer(null);
154 : dl 1.4 shouldThrow();
155 : jsr166 1.17 } catch (NullPointerException success) {}
156 : dl 1.1 }
157 :    
158 : dl 1.4 /**
159 : dl 1.6 * add(null) throws NPE
160 :     */
161 :     public void testAddNull() {
162 : jsr166 1.15 try {
163 : dl 1.6 ArrayBlockingQueue q = new ArrayBlockingQueue(1);
164 :     q.add(null);
165 :     shouldThrow();
166 : jsr166 1.17 } catch (NullPointerException success) {}
167 : dl 1.6 }
168 :    
169 :     /**
170 : dl 1.5 * Offer succeeds if not full; fails if full
171 : dl 1.4 */
172 :     public void testOffer() {
173 : dl 1.1 ArrayBlockingQueue q = new ArrayBlockingQueue(1);
174 : dl 1.3 assertTrue(q.offer(zero));
175 :     assertFalse(q.offer(one));
176 : dl 1.1 }
177 :    
178 : dl 1.4 /**
179 : dl 1.5 * add succeeds if not full; throws ISE if full
180 : dl 1.4 */
181 :     public void testAdd() {
182 : jsr166 1.15 try {
183 : dl 1.3 ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE);
184 :     for (int i = 0; i < SIZE; ++i) {
185 : dl 1.1 assertTrue(q.add(new Integer(i)));
186 :     }
187 :     assertEquals(0, q.remainingCapacity());
188 : dl 1.3 q.add(new Integer(SIZE));
189 : jsr166 1.17 shouldThrow();
190 :     } catch (IllegalStateException success) {}
191 : dl 1.1 }
192 :    
193 : dl 1.4 /**
194 : dl 1.5 * addAll(null) throws NPE
195 : dl 1.4 */
196 :     public void testAddAll1() {
197 : dl 1.1 try {
198 :     ArrayBlockingQueue q = new ArrayBlockingQueue(1);
199 :     q.addAll(null);
200 : dl 1.4 shouldThrow();
201 : jsr166 1.17 } catch (NullPointerException success) {}
202 : dl 1.1 }
203 : dl 1.6
204 :     /**
205 :     * addAll(this) throws IAE
206 :     */
207 :     public void testAddAllSelf() {
208 :     try {
209 :     ArrayBlockingQueue q = populatedQueue(SIZE);
210 :     q.addAll(q);
211 :     shouldThrow();
212 : jsr166 1.17 } catch (IllegalArgumentException success) {}
213 : dl 1.6 }
214 :    
215 :    
216 : dl 1.4 /**
217 : dl 1.5 * addAll of a collection with null elements throws NPE
218 : dl 1.4 */
219 :     public void testAddAll2() {
220 : dl 1.1 try {
221 : dl 1.3 ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE);
222 :     Integer[] ints = new Integer[SIZE];
223 : dl 1.1 q.addAll(Arrays.asList(ints));
224 : dl 1.4 shouldThrow();
225 : jsr166 1.17 } catch (NullPointerException success) {}
226 : dl 1.1 }
227 : dl 1.4 /**
228 : dl 1.5 * addAll of a collection with any null elements throws NPE after
229 :     * possibly adding some elements
230 : dl 1.4 */
231 :     public void testAddAll3() {
232 : dl 1.1 try {
233 : dl 1.3 ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE);
234 :     Integer[] ints = new Integer[SIZE];
235 :     for (int i = 0; i < SIZE-1; ++i)
236 : dl 1.1 ints[i] = new Integer(i);
237 :     q.addAll(Arrays.asList(ints));
238 : dl 1.4 shouldThrow();
239 : jsr166 1.17 } catch (NullPointerException success) {}
240 : dl 1.1 }
241 : dl 1.4 /**
242 : dl 1.5 * addAll throws ISE if not enough room
243 : dl 1.4 */
244 :     public void testAddAll4() {
245 : dl 1.1 try {
246 :     ArrayBlockingQueue q = new ArrayBlockingQueue(1);
247 : dl 1.3 Integer[] ints = new Integer[SIZE];
248 :     for (int i = 0; i < SIZE; ++i)
249 : dl 1.1 ints[i] = new Integer(i);
250 :     q.addAll(Arrays.asList(ints));
251 : dl 1.4 shouldThrow();
252 : jsr166 1.17 } catch (IllegalStateException success) {}
253 : dl 1.1 }
254 : dl 1.4 /**
255 : dl 1.5 * Queue contains all elements, in traversal order, of successful addAll
256 : dl 1.4 */
257 :     public void testAddAll5() {
258 : jsr166 1.17 Integer[] empty = new Integer[0];
259 :     Integer[] ints = new Integer[SIZE];
260 :     for (int i = 0; i < SIZE; ++i)
261 :     ints[i] = new Integer(i);
262 :     ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE);
263 :     assertFalse(q.addAll(Arrays.asList(empty)));
264 :     assertTrue(q.addAll(Arrays.asList(ints)));
265 :     for (int i = 0; i < SIZE; ++i)
266 :     assertEquals(ints[i], q.poll());
267 : dl 1.1 }
268 :    
269 : dl 1.4 /**
270 : dl 1.5 * put(null) throws NPE
271 : dl 1.4 */
272 : jsr166 1.17 public void testPutNull() throws InterruptedException {
273 : jsr166 1.15 try {
274 : dl 1.3 ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE);
275 : dl 1.1 q.put(null);
276 : dl 1.4 shouldThrow();
277 : jsr166 1.17 } catch (NullPointerException success) {}
278 : dl 1.1 }
279 :    
280 : dl 1.4 /**
281 : dl 1.5 * all elements successfully put are contained
282 : dl 1.4 */
283 : jsr166 1.17 public void testPut() throws InterruptedException {
284 :     ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE);
285 :     for (int i = 0; i < SIZE; ++i) {
286 :     Integer I = new Integer(i);
287 :     q.put(I);
288 :     assertTrue(q.contains(I));
289 : dl 1.1 }
290 : jsr166 1.17 assertEquals(0, q.remainingCapacity());
291 : dl 1.1 }
292 :    
293 : dl 1.4 /**
294 : dl 1.5 * put blocks interruptibly if full
295 : dl 1.4 */
296 : jsr166 1.17 public void testBlockingPut() throws InterruptedException {
297 : dl 1.10 final ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE);
298 : jsr166 1.17 Thread t = new Thread(new CheckedRunnable() {
299 :     public void realRun() {
300 :     int added = 0;
301 :     try {
302 :     for (int i = 0; i < SIZE; ++i) {
303 :     q.put(new Integer(i));
304 :     ++added;
305 : jsr166 1.12 }
306 : jsr166 1.17 q.put(new Integer(SIZE));
307 :     threadShouldThrow();
308 : jsr166 1.20 } catch (InterruptedException success) {
309 : jsr166 1.17 threadAssertEquals(added, SIZE);
310 :     }}});
311 :    
312 :     t.start();
313 :     Thread.sleep(MEDIUM_DELAY_MS);
314 :     t.interrupt();
315 :     t.join();
316 : dl 1.1 }
317 :    
318 : dl 1.4 /**
319 : dl 1.5 * put blocks waiting for take when full
320 : dl 1.4 */
321 : jsr166 1.17 public void testPutWithTake() throws InterruptedException {
322 : dl 1.1 final ArrayBlockingQueue q = new ArrayBlockingQueue(2);
323 : jsr166 1.17 Thread t = new Thread(new CheckedRunnable() {
324 :     public void realRun() {
325 :     int added = 0;
326 :     try {
327 :     q.put(new Object());
328 :     ++added;
329 :     q.put(new Object());
330 :     ++added;
331 :     q.put(new Object());
332 :     ++added;
333 :     q.put(new Object());
334 :     ++added;
335 :     threadShouldThrow();
336 : jsr166 1.20 } catch (InterruptedException success) {
337 : jsr166 1.17 threadAssertTrue(added >= 2);
338 :     }
339 :     }});
340 :    
341 :     t.start();
342 :     Thread.sleep(SHORT_DELAY_MS);
343 :     q.take();
344 :     t.interrupt();
345 :     t.join();
346 : dl 1.1 }
347 :    
348 : dl 1.4 /**
349 : dl 1.5 * timed offer times out if full and elements not taken
350 : dl 1.4 */
351 : jsr166 1.17 public void testTimedOffer() throws InterruptedException {
352 : dl 1.1 final ArrayBlockingQueue q = new ArrayBlockingQueue(2);
353 : jsr166 1.17 Thread t = new ThreadShouldThrow(InterruptedException.class) {
354 :     public void realRun() throws InterruptedException {
355 :     q.put(new Object());
356 :     q.put(new Object());
357 :     threadAssertFalse(q.offer(new Object(), SHORT_DELAY_MS/2, MILLISECONDS));
358 :     q.offer(new Object(), LONG_DELAY_MS, MILLISECONDS);
359 :     }};
360 :    
361 :     t.start();
362 :     Thread.sleep(SHORT_DELAY_MS);
363 :     t.interrupt();
364 :     t.join();
365 : dl 1.1 }
366 :    
367 : dl 1.4 /**
368 : dl 1.5 * take retrieves elements in FIFO order
369 : dl 1.4 */
370 : jsr166 1.17 public void testTake() throws InterruptedException {
371 :     ArrayBlockingQueue q = populatedQueue(SIZE);
372 :     for (int i = 0; i < SIZE; ++i) {
373 :     assertEquals(i, ((Integer)q.take()).intValue());
374 : jsr166 1.15 }
375 : dl 1.1 }
376 :    
377 : dl 1.4 /**
378 : dl 1.5 * take blocks interruptibly when empty
379 : dl 1.4 */
380 : jsr166 1.17 public void testTakeFromEmpty() throws InterruptedException {
381 : dl 1.1 final ArrayBlockingQueue q = new ArrayBlockingQueue(2);
382 : jsr166 1.17 Thread t = new ThreadShouldThrow(InterruptedException.class) {
383 :     public void realRun() throws InterruptedException {
384 :     q.take();
385 :     }};
386 :    
387 :     t.start();
388 :     Thread.sleep(SHORT_DELAY_MS);
389 :     t.interrupt();
390 :     t.join();
391 : dl 1.1 }
392 :    
393 : dl 1.4 /**
394 : dl 1.5 * Take removes existing elements until empty, then blocks interruptibly
395 : dl 1.4 */
396 : jsr166 1.17 public void testBlockingTake() throws InterruptedException {
397 :     Thread t = new ThreadShouldThrow(InterruptedException.class) {
398 :     public void realRun() throws InterruptedException {
399 :     ArrayBlockingQueue q = populatedQueue(SIZE);
400 :     for (int i = 0; i < SIZE; ++i) {
401 :     threadAssertEquals(i, ((Integer)q.take()).intValue());
402 :     }
403 :     q.take();
404 :     }};
405 :    
406 :     t.start();
407 : jsr166 1.12 Thread.sleep(SHORT_DELAY_MS);
408 : dl 1.3 t.interrupt();
409 :     t.join();
410 : dl 1.1 }
411 :    
412 :    
413 : dl 1.4 /**
414 : dl 1.5 * poll succeeds unless empty
415 : dl 1.4 */
416 :     public void testPoll() {
417 : dl 1.3 ArrayBlockingQueue q = populatedQueue(SIZE);
418 :     for (int i = 0; i < SIZE; ++i) {
419 : dl 1.1 assertEquals(i, ((Integer)q.poll()).intValue());
420 :     }
421 : jsr166 1.15 assertNull(q.poll());
422 : dl 1.1 }
423 :    
424 : dl 1.4 /**
425 : dl 1.5 * timed pool with zero timeout succeeds when non-empty, else times out
426 : dl 1.4 */
427 : jsr166 1.17 public void testTimedPoll0() throws InterruptedException {
428 :     ArrayBlockingQueue q = populatedQueue(SIZE);
429 :     for (int i = 0; i < SIZE; ++i) {
430 :     assertEquals(i, ((Integer)q.poll(0, MILLISECONDS)).intValue());
431 : jsr166 1.15 }
432 : jsr166 1.17 assertNull(q.poll(0, MILLISECONDS));
433 : dl 1.1 }
434 :    
435 : dl 1.4 /**
436 : dl 1.5 * timed pool with nonzero timeout succeeds when non-empty, else times out
437 : dl 1.4 */
438 : jsr166 1.17 public void testTimedPoll() throws InterruptedException {
439 :     ArrayBlockingQueue q = populatedQueue(SIZE);
440 :     for (int i = 0; i < SIZE; ++i) {
441 :     assertEquals(i, ((Integer)q.poll(SHORT_DELAY_MS, MILLISECONDS)).intValue());
442 : jsr166 1.15 }
443 : jsr166 1.17 assertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS));
444 : dl 1.1 }
445 :    
446 : dl 1.4 /**
447 : dl 1.5 * Interrupted timed poll throws InterruptedException instead of
448 :     * returning timeout status
449 : dl 1.4 */
450 : jsr166 1.17 public void testInterruptedTimedPoll() throws InterruptedException {
451 : jsr166 1.21 Thread t = new Thread(new CheckedRunnable() {
452 : jsr166 1.17 public void realRun() throws InterruptedException {
453 :     ArrayBlockingQueue q = populatedQueue(SIZE);
454 :     for (int i = 0; i < SIZE; ++i) {
455 : jsr166 1.21 assertEquals(i, ((Integer)q.poll(SHORT_DELAY_MS, MILLISECONDS)).intValue());
456 : jsr166 1.17 }
457 : jsr166 1.21 try {
458 :     q.poll(SMALL_DELAY_MS, MILLISECONDS);
459 : jsr166 1.22 shouldThrow();
460 : jsr166 1.21 } catch (InterruptedException success) {}
461 :     }});
462 : jsr166 1.17
463 :     t.start();
464 : jsr166 1.21 Thread.sleep(SHORT_DELAY_MS);
465 : jsr166 1.17 t.interrupt();
466 :     t.join();
467 : dl 1.1 }
468 :    
469 : dl 1.4 /**
470 : dl 1.5 * timed poll before a delayed offer fails; after offer succeeds;
471 :     * on interruption throws
472 : dl 1.4 */
473 : jsr166 1.17 public void testTimedPollWithOffer() throws InterruptedException {
474 : dl 1.1 final ArrayBlockingQueue q = new ArrayBlockingQueue(2);
475 : jsr166 1.23 Thread t = new Thread(new CheckedRunnable() {
476 : jsr166 1.17 public void realRun() throws InterruptedException {
477 : jsr166 1.23 assertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS));
478 :     assertSame(zero, q.poll(LONG_DELAY_MS, MILLISECONDS));
479 :     try {
480 :     q.poll(LONG_DELAY_MS, MILLISECONDS);
481 :     shouldThrow();
482 :     } catch (InterruptedException success) {}
483 :     }});
484 : jsr166 1.17
485 :     t.start();
486 :     Thread.sleep(SMALL_DELAY_MS);
487 :     assertTrue(q.offer(zero, SHORT_DELAY_MS, MILLISECONDS));
488 :     t.interrupt();
489 :     t.join();
490 : jsr166 1.12 }
491 : dl 1.1
492 :    
493 : dl 1.4 /**
494 : dl 1.5 * peek returns next element, or null if empty
495 : dl 1.4 */
496 :     public void testPeek() {
497 : dl 1.3 ArrayBlockingQueue q = populatedQueue(SIZE);
498 :     for (int i = 0; i < SIZE; ++i) {
499 : dl 1.1 assertEquals(i, ((Integer)q.peek()).intValue());
500 :     q.poll();
501 :     assertTrue(q.peek() == null ||
502 :     i != ((Integer)q.peek()).intValue());
503 :     }
504 : jsr166 1.15 assertNull(q.peek());
505 : dl 1.1 }
506 :    
507 : dl 1.4 /**
508 : dl 1.5 * element returns next element, or throws NSEE if empty
509 : dl 1.4 */
510 :     public void testElement() {
511 : dl 1.3 ArrayBlockingQueue q = populatedQueue(SIZE);
512 :     for (int i = 0; i < SIZE; ++i) {
513 : dl 1.1 assertEquals(i, ((Integer)q.element()).intValue());
514 :     q.poll();
515 :     }
516 :     try {
517 :     q.element();
518 : dl 1.4 shouldThrow();
519 : jsr166 1.17 } catch (NoSuchElementException success) {}
520 : dl 1.1 }
521 :    
522 : dl 1.4 /**
523 : dl 1.5 * remove removes next element, or throws NSEE if empty
524 : dl 1.4 */
525 :     public void testRemove() {
526 : dl 1.3 ArrayBlockingQueue q = populatedQueue(SIZE);
527 :     for (int i = 0; i < SIZE; ++i) {
528 : dl 1.1 assertEquals(i, ((Integer)q.remove()).intValue());
529 :     }
530 :     try {
531 :     q.remove();
532 : dl 1.4 shouldThrow();
533 : jsr166 1.17 } catch (NoSuchElementException success) {}
534 : dl 1.1 }
535 :    
536 : dl 1.4 /**
537 : dl 1.5 * remove(x) removes x and returns true if present
538 : dl 1.4 */
539 :     public void testRemoveElement() {
540 : dl 1.3 ArrayBlockingQueue q = populatedQueue(SIZE);
541 :     for (int i = 1; i < SIZE; i+=2) {
542 : dl 1.1 assertTrue(q.remove(new Integer(i)));
543 :     }
544 : dl 1.3 for (int i = 0; i < SIZE; i+=2) {
545 : dl 1.1 assertTrue(q.remove(new Integer(i)));
546 :     assertFalse(q.remove(new Integer(i+1)));
547 :     }
548 : dl 1.2 assertTrue(q.isEmpty());
549 : dl 1.1 }
550 : jsr166 1.12
551 : dl 1.4 /**
552 : dl 1.5 * contains(x) reports true when elements added but not yet removed
553 : dl 1.4 */
554 :     public void testContains() {
555 : dl 1.3 ArrayBlockingQueue q = populatedQueue(SIZE);
556 :     for (int i = 0; i < SIZE; ++i) {
557 : dl 1.1 assertTrue(q.contains(new Integer(i)));
558 :     q.poll();
559 :     assertFalse(q.contains(new Integer(i)));
560 :     }
561 :     }
562 :    
563 : dl 1.4 /**
564 : dl 1.5 * clear removes all elements
565 : dl 1.4 */
566 :     public void testClear() {
567 : dl 1.3 ArrayBlockingQueue q = populatedQueue(SIZE);
568 : dl 1.1 q.clear();
569 :     assertTrue(q.isEmpty());
570 :     assertEquals(0, q.size());
571 : dl 1.3 assertEquals(SIZE, q.remainingCapacity());
572 :     q.add(one);
573 : dl 1.1 assertFalse(q.isEmpty());
574 : dl 1.11 assertTrue(q.contains(one));
575 : dl 1.1 q.clear();
576 :     assertTrue(q.isEmpty());
577 :     }
578 :    
579 : dl 1.4 /**
580 : dl 1.5 * containsAll(c) is true when c contains a subset of elements
581 : dl 1.4 */
582 :     public void testContainsAll() {
583 : dl 1.3 ArrayBlockingQueue q = populatedQueue(SIZE);
584 :     ArrayBlockingQueue p = new ArrayBlockingQueue(SIZE);
585 :     for (int i = 0; i < SIZE; ++i) {
586 : dl 1.1 assertTrue(q.containsAll(p));
587 :     assertFalse(p.containsAll(q));
588 :     p.add(new Integer(i));
589 :     }
590 :     assertTrue(p.containsAll(q));
591 :     }
592 :    
593 : dl 1.4 /**
594 : dl 1.5 * retainAll(c) retains only those elements of c and reports true if changed
595 : dl 1.4 */
596 :     public void testRetainAll() {
597 : dl 1.3 ArrayBlockingQueue q = populatedQueue(SIZE);
598 :     ArrayBlockingQueue p = populatedQueue(SIZE);
599 :     for (int i = 0; i < SIZE; ++i) {
600 : dl 1.1 boolean changed = q.retainAll(p);
601 :     if (i == 0)
602 :     assertFalse(changed);
603 :     else
604 :     assertTrue(changed);
605 :    
606 :     assertTrue(q.containsAll(p));
607 : dl 1.3 assertEquals(SIZE-i, q.size());
608 : dl 1.1 p.remove();
609 :     }
610 :     }
611 :    
612 : dl 1.4 /**
613 : dl 1.5 * removeAll(c) removes only those elements of c and reports true if changed
614 : dl 1.4 */
615 :     public void testRemoveAll() {
616 : dl 1.3 for (int i = 1; i < SIZE; ++i) {
617 :     ArrayBlockingQueue q = populatedQueue(SIZE);
618 :     ArrayBlockingQueue p = populatedQueue(i);
619 : dl 1.1 assertTrue(q.removeAll(p));
620 : dl 1.3 assertEquals(SIZE-i, q.size());
621 : dl 1.1 for (int j = 0; j < i; ++j) {
622 :     Integer I = (Integer)(p.remove());
623 :     assertFalse(q.contains(I));
624 :     }
625 :     }
626 :     }
627 :    
628 : dl 1.4 /**
629 : dl 1.5 * toArray contains all elements
630 : dl 1.4 */
631 : jsr166 1.17 public void testToArray() throws InterruptedException {
632 : dl 1.3 ArrayBlockingQueue q = populatedQueue(SIZE);
633 : jsr166 1.15 Object[] o = q.toArray();
634 :     for (int i = 0; i < o.length; i++)
635 :     assertEquals(o[i], q.take());
636 : dl 1.1 }
637 :    
638 : dl 1.4 /**
639 : dl 1.5 * toArray(a) contains all elements
640 : dl 1.4 */
641 : jsr166 1.17 public void testToArray2() throws InterruptedException {
642 : dl 1.3 ArrayBlockingQueue q = populatedQueue(SIZE);
643 : jsr166 1.15 Integer[] ints = new Integer[SIZE];
644 :     ints = (Integer[])q.toArray(ints);
645 : jsr166 1.17 for (int i = 0; i < ints.length; i++)
646 :     assertEquals(ints[i], q.take());
647 : dl 1.1 }
648 : dl 1.6
649 :     /**
650 :     * toArray(null) throws NPE
651 :     */
652 :     public void testToArray_BadArg() {
653 : jsr166 1.15 try {
654 : dl 1.6 ArrayBlockingQueue q = populatedQueue(SIZE);
655 : jsr166 1.15 Object o[] = q.toArray(null);
656 :     shouldThrow();
657 :     } catch (NullPointerException success) {}
658 : dl 1.6 }
659 :    
660 :     /**
661 : dl 1.8 * toArray with incompatible array type throws CCE
662 : dl 1.6 */
663 :     public void testToArray1_BadArg() {
664 : jsr166 1.15 try {
665 : dl 1.6 ArrayBlockingQueue q = populatedQueue(SIZE);
666 : jsr166 1.15 Object o[] = q.toArray(new String[10] );
667 :     shouldThrow();
668 : jsr166 1.18 } catch (ArrayStoreException success) {}
669 : dl 1.6 }
670 :    
671 : jsr166 1.12
672 : dl 1.4 /**
673 : dl 1.5 * iterator iterates through all elements
674 : dl 1.4 */
675 : jsr166 1.17 public void testIterator() throws InterruptedException {
676 : dl 1.3 ArrayBlockingQueue q = populatedQueue(SIZE);
677 : jsr166 1.15 Iterator it = q.iterator();
678 : jsr166 1.17 while (it.hasNext()) {
679 :     assertEquals(it.next(), q.take());
680 : jsr166 1.15 }
681 : dl 1.1 }
682 :    
683 : dl 1.4 /**
684 : dl 1.5 * iterator.remove removes current element
685 :     */
686 :     public void testIteratorRemove () {
687 :     final ArrayBlockingQueue q = new ArrayBlockingQueue(3);
688 :     q.add(two);
689 :     q.add(one);
690 :     q.add(three);
691 :    
692 :     Iterator it = q.iterator();
693 :     it.next();
694 :     it.remove();
695 : jsr166 1.12
696 : dl 1.5 it = q.iterator();
697 :     assertEquals(it.next(), one);
698 :     assertEquals(it.next(), three);
699 :     assertFalse(it.hasNext());
700 :     }
701 :    
702 :     /**
703 :     * iterator ordering is FIFO
704 : dl 1.4 */
705 : dl 1.1 public void testIteratorOrdering() {
706 :     final ArrayBlockingQueue q = new ArrayBlockingQueue(3);
707 : dl 1.3 q.add(one);
708 :     q.add(two);
709 :     q.add(three);
710 : dl 1.1
711 :     assertEquals("queue should be full", 0, q.remainingCapacity());
712 :    
713 :     int k = 0;
714 :     for (Iterator it = q.iterator(); it.hasNext();) {
715 :     int i = ((Integer)(it.next())).intValue();
716 : dl 1.4 assertEquals(++k, i);
717 : dl 1.1 }
718 : dl 1.4 assertEquals(3, k);
719 : dl 1.1 }
720 :    
721 : dl 1.4 /**
722 : dl 1.5 * Modifications do not cause iterators to fail
723 : dl 1.4 */
724 : dl 1.1 public void testWeaklyConsistentIteration () {
725 :     final ArrayBlockingQueue q = new ArrayBlockingQueue(3);
726 : dl 1.3 q.add(one);
727 :     q.add(two);
728 :     q.add(three);
729 : jsr166 1.17 for (Iterator it = q.iterator(); it.hasNext();) {
730 :     q.remove();
731 :     it.next();
732 : dl 1.1 }
733 : dl 1.4 assertEquals(0, q.size());
734 : dl 1.1 }
735 :    
736 :    
737 : dl 1.4 /**
738 : dl 1.5 * toString contains toStrings of elements
739 : dl 1.4 */
740 :     public void testToString() {
741 : dl 1.3 ArrayBlockingQueue q = populatedQueue(SIZE);
742 : dl 1.1 String s = q.toString();
743 : dl 1.3 for (int i = 0; i < SIZE; ++i) {
744 : dl 1.1 assertTrue(s.indexOf(String.valueOf(i)) >= 0);
745 :     }
746 : jsr166 1.12 }
747 : dl 1.1
748 :    
749 : dl 1.4 /**
750 : dl 1.5 * offer transfers elements across Executor tasks
751 : dl 1.4 */
752 : dl 1.1 public void testOfferInExecutor() {
753 :     final ArrayBlockingQueue q = new ArrayBlockingQueue(2);
754 : dl 1.3 q.add(one);
755 :     q.add(two);
756 : dl 1.1 ExecutorService executor = Executors.newFixedThreadPool(2);
757 : jsr166 1.17 executor.execute(new CheckedRunnable() {
758 :     public void realRun() throws InterruptedException {
759 : dl 1.3 threadAssertFalse(q.offer(three));
760 : jsr166 1.17 threadAssertTrue(q.offer(three, MEDIUM_DELAY_MS, MILLISECONDS));
761 :     threadAssertEquals(0, q.remainingCapacity());
762 :     }});
763 :    
764 :     executor.execute(new CheckedRunnable() {
765 :     public void realRun() throws InterruptedException {
766 :     Thread.sleep(SMALL_DELAY_MS);
767 :     threadAssertEquals(one, q.take());
768 :     }});
769 : jsr166 1.12
770 : dl 1.3 joinPool(executor);
771 : dl 1.1
772 :     }
773 :    
774 : dl 1.4 /**
775 : dl 1.5 * poll retrieves elements across Executor threads
776 : dl 1.4 */
777 : dl 1.1 public void testPollInExecutor() {
778 :     final ArrayBlockingQueue q = new ArrayBlockingQueue(2);
779 :     ExecutorService executor = Executors.newFixedThreadPool(2);
780 : jsr166 1.17 executor.execute(new CheckedRunnable() {
781 :     public void realRun() throws InterruptedException {
782 : dl 1.3 threadAssertNull(q.poll());
783 : jsr166 1.17 threadAssertTrue(null != q.poll(MEDIUM_DELAY_MS, MILLISECONDS));
784 :     threadAssertTrue(q.isEmpty());
785 :     }});
786 :    
787 :     executor.execute(new CheckedRunnable() {
788 :     public void realRun() throws InterruptedException {
789 :     Thread.sleep(SMALL_DELAY_MS);
790 :     q.put(one);
791 :     }});
792 : jsr166 1.12
793 : dl 1.3 joinPool(executor);
794 : dl 1.1 }
795 : dl 1.2
796 : dl 1.4 /**
797 : dl 1.5 * A deserialized serialized queue has same elements in same order
798 : dl 1.4 */
799 : jsr166 1.17 public void testSerialization() throws Exception {
800 : dl 1.3 ArrayBlockingQueue q = populatedQueue(SIZE);
801 : dl 1.2
802 : jsr166 1.17 ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
803 :     ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
804 :     out.writeObject(q);
805 :     out.close();
806 :    
807 :     ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
808 :     ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
809 :     ArrayBlockingQueue r = (ArrayBlockingQueue)in.readObject();
810 :     assertEquals(q.size(), r.size());
811 :     while (!q.isEmpty())
812 :     assertEquals(q.remove(), r.remove());
813 : dl 1.6 }
814 :    
815 :     /**
816 :     * drainTo(null) throws NPE
817 : jsr166 1.12 */
818 : dl 1.6 public void testDrainToNull() {
819 :     ArrayBlockingQueue q = populatedQueue(SIZE);
820 :     try {
821 :     q.drainTo(null);
822 :     shouldThrow();
823 : jsr166 1.17 } catch (NullPointerException success) {}
824 : dl 1.6 }
825 :    
826 :     /**
827 :     * drainTo(this) throws IAE
828 : jsr166 1.12 */
829 : dl 1.6 public void testDrainToSelf() {
830 :     ArrayBlockingQueue q = populatedQueue(SIZE);
831 :     try {
832 :     q.drainTo(q);
833 :     shouldThrow();
834 : jsr166 1.17 } catch (IllegalArgumentException success) {}
835 : dl 1.6 }
836 :    
837 :     /**
838 :     * drainTo(c) empties queue into another collection c
839 : jsr166 1.12 */
840 : dl 1.6 public void testDrainTo() {
841 :     ArrayBlockingQueue q = populatedQueue(SIZE);
842 :     ArrayList l = new ArrayList();
843 :     q.drainTo(l);
844 :     assertEquals(q.size(), 0);
845 :     assertEquals(l.size(), SIZE);
846 : jsr166 1.12 for (int i = 0; i < SIZE; ++i)
847 : dl 1.6 assertEquals(l.get(i), new Integer(i));
848 : dl 1.11 q.add(zero);
849 :     q.add(one);
850 :     assertFalse(q.isEmpty());
851 :     assertTrue(q.contains(zero));
852 :     assertTrue(q.contains(one));
853 :     l.clear();
854 :     q.drainTo(l);
855 :     assertEquals(q.size(), 0);
856 :     assertEquals(l.size(), 2);
857 : jsr166 1.12 for (int i = 0; i < 2; ++i)
858 : dl 1.11 assertEquals(l.get(i), new Integer(i));
859 : dl 1.6 }
860 :    
861 :     /**
862 :     * drainTo empties full queue, unblocking a waiting put.
863 : jsr166 1.12 */
864 : jsr166 1.17 public void testDrainToWithActivePut() throws InterruptedException {
865 : dl 1.6 final ArrayBlockingQueue q = populatedQueue(SIZE);
866 : jsr166 1.17 Thread t = new Thread(new CheckedRunnable() {
867 :     public void realRun() throws InterruptedException {
868 :     q.put(new Integer(SIZE+1));
869 :     }});
870 :    
871 :     t.start();
872 :     ArrayList l = new ArrayList();
873 :     q.drainTo(l);
874 :     assertTrue(l.size() >= SIZE);
875 :     for (int i = 0; i < SIZE; ++i)
876 :     assertEquals(l.get(i), new Integer(i));
877 :     t.join();
878 :     assertTrue(q.size() + l.size() >= SIZE);
879 : dl 1.6 }
880 :    
881 :     /**
882 :     * drainTo(null, n) throws NPE
883 : jsr166 1.12 */
884 : dl 1.6 public void testDrainToNullN() {
885 :     ArrayBlockingQueue q = populatedQueue(SIZE);
886 :     try {
887 :     q.drainTo(null, 0);
888 :     shouldThrow();
889 : jsr166 1.17 } catch (NullPointerException success) {}
890 : dl 1.6 }
891 :    
892 :     /**
893 :     * drainTo(this, n) throws IAE
894 : jsr166 1.12 */
895 : dl 1.6 public void testDrainToSelfN() {
896 :     ArrayBlockingQueue q = populatedQueue(SIZE);
897 :     try {
898 :     q.drainTo(q, 0);
899 :     shouldThrow();
900 : jsr166 1.17 } catch (IllegalArgumentException success) {}
901 : dl 1.6 }
902 :    
903 :     /**
904 :     * drainTo(c, n) empties first max {n, size} elements of queue into c
905 : jsr166 1.12 */
906 : dl 1.6 public void testDrainToN() {
907 : dl 1.11 ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE*2);
908 : dl 1.6 for (int i = 0; i < SIZE + 2; ++i) {
909 : jsr166 1.13 for (int j = 0; j < SIZE; j++)
910 : dl 1.11 assertTrue(q.offer(new Integer(j)));
911 : dl 1.6 ArrayList l = new ArrayList();
912 :     q.drainTo(l, i);
913 :     int k = (i < SIZE)? i : SIZE;
914 : dl 1.11 assertEquals(l.size(), k);
915 : dl 1.6 assertEquals(q.size(), SIZE-k);
916 : jsr166 1.12 for (int j = 0; j < k; ++j)
917 : dl 1.6 assertEquals(l.get(j), new Integer(j));
918 : dl 1.11 while (q.poll() != null) ;
919 : dl 1.2 }
920 :     }
921 :    
922 : dl 1.1 }

Doug Lea
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