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