1 |
|
/* |
2 |
|
* Written by Doug Lea with assistance from members of JCP JSR-166 |
3 |
|
* Expert Group and released to the public domain, as explained at |
4 |
< |
* http://creativecommons.org/licenses/publicdomain |
4 |
> |
* http://creativecommons.org/publicdomain/zero/1.0/ |
5 |
|
* Other contributors include Andrew Wright, Jeffrey Hayes, |
6 |
|
* Pat Fisher, Mike Judd. |
7 |
|
*/ |
8 |
|
|
9 |
– |
|
10 |
– |
import junit.framework.*; |
11 |
– |
import java.util.*; |
12 |
– |
import java.util.concurrent.*; |
9 |
|
import static java.util.concurrent.TimeUnit.MILLISECONDS; |
10 |
< |
import java.io.*; |
10 |
> |
|
11 |
> |
import java.util.ArrayList; |
12 |
> |
import java.util.Arrays; |
13 |
> |
import java.util.Collection; |
14 |
> |
import java.util.Iterator; |
15 |
> |
import java.util.NoSuchElementException; |
16 |
> |
import java.util.Queue; |
17 |
> |
import java.util.concurrent.ArrayBlockingQueue; |
18 |
> |
import java.util.concurrent.BlockingQueue; |
19 |
> |
import java.util.concurrent.CountDownLatch; |
20 |
> |
import java.util.concurrent.Executors; |
21 |
> |
import java.util.concurrent.ExecutorService; |
22 |
> |
|
23 |
> |
import junit.framework.Test; |
24 |
|
|
25 |
|
public class ArrayBlockingQueueTest extends JSR166TestCase { |
26 |
|
|
27 |
|
public static class Fair extends BlockingQueueTest { |
28 |
|
protected BlockingQueue emptyCollection() { |
29 |
< |
return new ArrayBlockingQueue(20, true); |
29 |
> |
return new ArrayBlockingQueue(SIZE, true); |
30 |
|
} |
31 |
|
} |
32 |
|
|
33 |
|
public static class NonFair extends BlockingQueueTest { |
34 |
|
protected BlockingQueue emptyCollection() { |
35 |
< |
return new ArrayBlockingQueue(20, false); |
35 |
> |
return new ArrayBlockingQueue(SIZE, false); |
36 |
|
} |
37 |
|
} |
38 |
|
|
39 |
|
public static void main(String[] args) { |
40 |
< |
junit.textui.TestRunner.run(suite()); |
40 |
> |
main(suite(), args); |
41 |
|
} |
42 |
|
|
43 |
|
public static Test suite() { |
44 |
+ |
class Implementation implements CollectionImplementation { |
45 |
+ |
public Class<?> klazz() { return ArrayBlockingQueue.class; } |
46 |
+ |
public Collection emptyCollection() { return new ArrayBlockingQueue(SIZE, false); } |
47 |
+ |
public Object makeElement(int i) { return i; } |
48 |
+ |
public boolean isConcurrent() { return true; } |
49 |
+ |
public boolean permitsNulls() { return false; } |
50 |
+ |
} |
51 |
|
return newTestSuite(ArrayBlockingQueueTest.class, |
52 |
|
new Fair().testSuite(), |
53 |
< |
new NonFair().testSuite()); |
53 |
> |
new NonFair().testSuite(), |
54 |
> |
CollectionTest.testSuite(new Implementation())); |
55 |
|
} |
56 |
|
|
57 |
|
/** |
58 |
< |
* Create a queue of given size containing consecutive |
59 |
< |
* Integers 0 ... n. |
58 |
> |
* Returns a new queue of given size containing consecutive |
59 |
> |
* Integers 0 ... n - 1. |
60 |
|
*/ |
61 |
< |
private ArrayBlockingQueue populatedQueue(int n) { |
62 |
< |
ArrayBlockingQueue q = new ArrayBlockingQueue(n); |
61 |
> |
private ArrayBlockingQueue<Integer> populatedQueue(int n) { |
62 |
> |
ArrayBlockingQueue<Integer> q = new ArrayBlockingQueue<Integer>(n); |
63 |
|
assertTrue(q.isEmpty()); |
64 |
|
for (int i = 0; i < n; i++) |
65 |
|
assertTrue(q.offer(new Integer(i))); |
66 |
|
assertFalse(q.isEmpty()); |
67 |
|
assertEquals(0, q.remainingCapacity()); |
68 |
|
assertEquals(n, q.size()); |
69 |
+ |
assertEquals((Integer) 0, q.peek()); |
70 |
|
return q; |
71 |
|
} |
72 |
|
|
82 |
|
*/ |
83 |
|
public void testConstructor2() { |
84 |
|
try { |
85 |
< |
ArrayBlockingQueue q = new ArrayBlockingQueue(0); |
85 |
> |
new ArrayBlockingQueue(0); |
86 |
|
shouldThrow(); |
87 |
|
} catch (IllegalArgumentException success) {} |
88 |
|
} |
92 |
|
*/ |
93 |
|
public void testConstructor3() { |
94 |
|
try { |
95 |
< |
ArrayBlockingQueue q = new ArrayBlockingQueue(1, true, null); |
95 |
> |
new ArrayBlockingQueue(1, true, null); |
96 |
|
shouldThrow(); |
97 |
|
} catch (NullPointerException success) {} |
98 |
|
} |
101 |
|
* Initializing from Collection of null elements throws NPE |
102 |
|
*/ |
103 |
|
public void testConstructor4() { |
104 |
+ |
Collection<Integer> elements = Arrays.asList(new Integer[SIZE]); |
105 |
|
try { |
106 |
< |
Integer[] ints = new Integer[SIZE]; |
88 |
< |
ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE, false, Arrays.asList(ints)); |
106 |
> |
new ArrayBlockingQueue(SIZE, false, elements); |
107 |
|
shouldThrow(); |
108 |
|
} catch (NullPointerException success) {} |
109 |
|
} |
112 |
|
* Initializing from Collection with some null elements throws NPE |
113 |
|
*/ |
114 |
|
public void testConstructor5() { |
115 |
+ |
Integer[] ints = new Integer[SIZE]; |
116 |
+ |
for (int i = 0; i < SIZE - 1; ++i) |
117 |
+ |
ints[i] = i; |
118 |
+ |
Collection<Integer> elements = Arrays.asList(ints); |
119 |
|
try { |
120 |
< |
Integer[] ints = new Integer[SIZE]; |
99 |
< |
for (int i = 0; i < SIZE-1; ++i) |
100 |
< |
ints[i] = new Integer(i); |
101 |
< |
ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE, false, Arrays.asList(ints)); |
120 |
> |
new ArrayBlockingQueue(SIZE, false, elements); |
121 |
|
shouldThrow(); |
122 |
|
} catch (NullPointerException success) {} |
123 |
|
} |
126 |
|
* Initializing from too large collection throws IAE |
127 |
|
*/ |
128 |
|
public void testConstructor6() { |
129 |
+ |
Integer[] ints = new Integer[SIZE]; |
130 |
+ |
for (int i = 0; i < SIZE; ++i) |
131 |
+ |
ints[i] = i; |
132 |
+ |
Collection<Integer> elements = Arrays.asList(ints); |
133 |
|
try { |
134 |
< |
Integer[] ints = new Integer[SIZE]; |
112 |
< |
for (int i = 0; i < SIZE; ++i) |
113 |
< |
ints[i] = new Integer(i); |
114 |
< |
ArrayBlockingQueue q = new ArrayBlockingQueue(1, false, Arrays.asList(ints)); |
134 |
> |
new ArrayBlockingQueue(SIZE - 1, false, elements); |
135 |
|
shouldThrow(); |
136 |
|
} catch (IllegalArgumentException success) {} |
137 |
|
} |
142 |
|
public void testConstructor7() { |
143 |
|
Integer[] ints = new Integer[SIZE]; |
144 |
|
for (int i = 0; i < SIZE; ++i) |
145 |
< |
ints[i] = new Integer(i); |
146 |
< |
ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE, true, Arrays.asList(ints)); |
145 |
> |
ints[i] = i; |
146 |
> |
Collection<Integer> elements = Arrays.asList(ints); |
147 |
> |
ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE, true, elements); |
148 |
|
for (int i = 0; i < SIZE; ++i) |
149 |
|
assertEquals(ints[i], q.poll()); |
150 |
|
} |
168 |
|
* remainingCapacity decreases on add, increases on remove |
169 |
|
*/ |
170 |
|
public void testRemainingCapacity() { |
171 |
< |
ArrayBlockingQueue q = populatedQueue(SIZE); |
171 |
> |
BlockingQueue q = populatedQueue(SIZE); |
172 |
|
for (int i = 0; i < SIZE; ++i) { |
173 |
|
assertEquals(i, q.remainingCapacity()); |
174 |
< |
assertEquals(SIZE-i, q.size()); |
175 |
< |
q.remove(); |
174 |
> |
assertEquals(SIZE, q.size() + q.remainingCapacity()); |
175 |
> |
assertEquals(i, q.remove()); |
176 |
|
} |
177 |
|
for (int i = 0; i < SIZE; ++i) { |
178 |
< |
assertEquals(SIZE-i, q.remainingCapacity()); |
179 |
< |
assertEquals(i, q.size()); |
180 |
< |
q.add(new Integer(i)); |
178 |
> |
assertEquals(SIZE - i, q.remainingCapacity()); |
179 |
> |
assertEquals(SIZE, q.size() + q.remainingCapacity()); |
180 |
> |
assertTrue(q.add(i)); |
181 |
|
} |
182 |
|
} |
183 |
|
|
184 |
|
/** |
164 |
– |
* offer(null) throws NPE |
165 |
– |
*/ |
166 |
– |
public void testOfferNull() { |
167 |
– |
try { |
168 |
– |
ArrayBlockingQueue q = new ArrayBlockingQueue(1); |
169 |
– |
q.offer(null); |
170 |
– |
shouldThrow(); |
171 |
– |
} catch (NullPointerException success) {} |
172 |
– |
} |
173 |
– |
|
174 |
– |
/** |
175 |
– |
* add(null) throws NPE |
176 |
– |
*/ |
177 |
– |
public void testAddNull() { |
178 |
– |
try { |
179 |
– |
ArrayBlockingQueue q = new ArrayBlockingQueue(1); |
180 |
– |
q.add(null); |
181 |
– |
shouldThrow(); |
182 |
– |
} catch (NullPointerException success) {} |
183 |
– |
} |
184 |
– |
|
185 |
– |
/** |
185 |
|
* Offer succeeds if not full; fails if full |
186 |
|
*/ |
187 |
|
public void testOffer() { |
194 |
|
* add succeeds if not full; throws ISE if full |
195 |
|
*/ |
196 |
|
public void testAdd() { |
197 |
+ |
ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE); |
198 |
+ |
for (int i = 0; i < SIZE; ++i) { |
199 |
+ |
assertTrue(q.add(new Integer(i))); |
200 |
+ |
} |
201 |
+ |
assertEquals(0, q.remainingCapacity()); |
202 |
|
try { |
199 |
– |
ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE); |
200 |
– |
for (int i = 0; i < SIZE; ++i) { |
201 |
– |
assertTrue(q.add(new Integer(i))); |
202 |
– |
} |
203 |
– |
assertEquals(0, q.remainingCapacity()); |
203 |
|
q.add(new Integer(SIZE)); |
204 |
|
shouldThrow(); |
205 |
|
} catch (IllegalStateException success) {} |
206 |
|
} |
207 |
|
|
208 |
|
/** |
210 |
– |
* addAll(null) throws NPE |
211 |
– |
*/ |
212 |
– |
public void testAddAll1() { |
213 |
– |
try { |
214 |
– |
ArrayBlockingQueue q = new ArrayBlockingQueue(1); |
215 |
– |
q.addAll(null); |
216 |
– |
shouldThrow(); |
217 |
– |
} catch (NullPointerException success) {} |
218 |
– |
} |
219 |
– |
|
220 |
– |
/** |
209 |
|
* addAll(this) throws IAE |
210 |
|
*/ |
211 |
|
public void testAddAllSelf() { |
212 |
+ |
ArrayBlockingQueue q = populatedQueue(SIZE); |
213 |
|
try { |
225 |
– |
ArrayBlockingQueue q = populatedQueue(SIZE); |
214 |
|
q.addAll(q); |
215 |
|
shouldThrow(); |
216 |
|
} catch (IllegalArgumentException success) {} |
217 |
|
} |
218 |
|
|
231 |
– |
|
232 |
– |
/** |
233 |
– |
* addAll of a collection with null elements throws NPE |
234 |
– |
*/ |
235 |
– |
public void testAddAll2() { |
236 |
– |
try { |
237 |
– |
ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE); |
238 |
– |
Integer[] ints = new Integer[SIZE]; |
239 |
– |
q.addAll(Arrays.asList(ints)); |
240 |
– |
shouldThrow(); |
241 |
– |
} catch (NullPointerException success) {} |
242 |
– |
} |
243 |
– |
|
219 |
|
/** |
220 |
|
* addAll of a collection with any null elements throws NPE after |
221 |
|
* possibly adding some elements |
222 |
|
*/ |
223 |
|
public void testAddAll3() { |
224 |
+ |
ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE); |
225 |
+ |
Integer[] ints = new Integer[SIZE]; |
226 |
+ |
for (int i = 0; i < SIZE - 1; ++i) |
227 |
+ |
ints[i] = new Integer(i); |
228 |
|
try { |
250 |
– |
ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE); |
251 |
– |
Integer[] ints = new Integer[SIZE]; |
252 |
– |
for (int i = 0; i < SIZE-1; ++i) |
253 |
– |
ints[i] = new Integer(i); |
229 |
|
q.addAll(Arrays.asList(ints)); |
230 |
|
shouldThrow(); |
231 |
|
} catch (NullPointerException success) {} |
235 |
|
* addAll throws ISE if not enough room |
236 |
|
*/ |
237 |
|
public void testAddAll4() { |
238 |
+ |
ArrayBlockingQueue q = new ArrayBlockingQueue(1); |
239 |
+ |
Integer[] ints = new Integer[SIZE]; |
240 |
+ |
for (int i = 0; i < SIZE; ++i) |
241 |
+ |
ints[i] = new Integer(i); |
242 |
|
try { |
264 |
– |
ArrayBlockingQueue q = new ArrayBlockingQueue(1); |
265 |
– |
Integer[] ints = new Integer[SIZE]; |
266 |
– |
for (int i = 0; i < SIZE; ++i) |
267 |
– |
ints[i] = new Integer(i); |
243 |
|
q.addAll(Arrays.asList(ints)); |
244 |
|
shouldThrow(); |
245 |
|
} catch (IllegalStateException success) {} |
261 |
|
} |
262 |
|
|
263 |
|
/** |
289 |
– |
* put(null) throws NPE |
290 |
– |
*/ |
291 |
– |
public void testPutNull() throws InterruptedException { |
292 |
– |
try { |
293 |
– |
ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE); |
294 |
– |
q.put(null); |
295 |
– |
shouldThrow(); |
296 |
– |
} catch (NullPointerException success) {} |
297 |
– |
} |
298 |
– |
|
299 |
– |
/** |
264 |
|
* all elements successfully put are contained |
265 |
|
*/ |
266 |
|
public void testPut() throws InterruptedException { |
267 |
|
ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE); |
268 |
|
for (int i = 0; i < SIZE; ++i) { |
269 |
< |
Integer I = new Integer(i); |
270 |
< |
q.put(I); |
271 |
< |
assertTrue(q.contains(I)); |
269 |
> |
Integer x = new Integer(i); |
270 |
> |
q.put(x); |
271 |
> |
assertTrue(q.contains(x)); |
272 |
|
} |
273 |
|
assertEquals(0, q.remainingCapacity()); |
274 |
|
} |
278 |
|
*/ |
279 |
|
public void testBlockingPut() throws InterruptedException { |
280 |
|
final ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE); |
281 |
< |
Thread t = new Thread(new CheckedRunnable() { |
281 |
> |
final CountDownLatch pleaseInterrupt = new CountDownLatch(1); |
282 |
> |
Thread t = newStartedThread(new CheckedRunnable() { |
283 |
|
public void realRun() throws InterruptedException { |
284 |
|
for (int i = 0; i < SIZE; ++i) |
285 |
|
q.put(i); |
286 |
|
assertEquals(SIZE, q.size()); |
287 |
|
assertEquals(0, q.remainingCapacity()); |
288 |
+ |
|
289 |
+ |
Thread.currentThread().interrupt(); |
290 |
+ |
try { |
291 |
+ |
q.put(99); |
292 |
+ |
shouldThrow(); |
293 |
+ |
} catch (InterruptedException success) {} |
294 |
+ |
assertFalse(Thread.interrupted()); |
295 |
+ |
|
296 |
+ |
pleaseInterrupt.countDown(); |
297 |
|
try { |
298 |
|
q.put(99); |
299 |
|
shouldThrow(); |
300 |
|
} catch (InterruptedException success) {} |
301 |
+ |
assertFalse(Thread.interrupted()); |
302 |
|
}}); |
303 |
|
|
304 |
< |
t.start(); |
305 |
< |
Thread.sleep(SHORT_DELAY_MS); |
304 |
> |
await(pleaseInterrupt); |
305 |
> |
assertThreadStaysAlive(t); |
306 |
|
t.interrupt(); |
307 |
< |
t.join(); |
307 |
> |
awaitTermination(t); |
308 |
|
assertEquals(SIZE, q.size()); |
309 |
|
assertEquals(0, q.remainingCapacity()); |
310 |
|
} |
311 |
|
|
312 |
|
/** |
313 |
< |
* put blocks waiting for take when full |
313 |
> |
* put blocks interruptibly waiting for take when full |
314 |
|
*/ |
315 |
|
public void testPutWithTake() throws InterruptedException { |
316 |
|
final int capacity = 2; |
317 |
|
final ArrayBlockingQueue q = new ArrayBlockingQueue(capacity); |
318 |
< |
Thread t = new Thread(new CheckedRunnable() { |
318 |
> |
final CountDownLatch pleaseTake = new CountDownLatch(1); |
319 |
> |
final CountDownLatch pleaseInterrupt = new CountDownLatch(1); |
320 |
> |
Thread t = newStartedThread(new CheckedRunnable() { |
321 |
|
public void realRun() throws InterruptedException { |
322 |
< |
for (int i = 0; i < capacity + 1; i++) |
322 |
> |
for (int i = 0; i < capacity; i++) |
323 |
|
q.put(i); |
324 |
+ |
pleaseTake.countDown(); |
325 |
+ |
q.put(86); |
326 |
+ |
|
327 |
+ |
pleaseInterrupt.countDown(); |
328 |
|
try { |
329 |
|
q.put(99); |
330 |
|
shouldThrow(); |
331 |
|
} catch (InterruptedException success) {} |
332 |
+ |
assertFalse(Thread.interrupted()); |
333 |
|
}}); |
334 |
|
|
335 |
< |
t.start(); |
336 |
< |
Thread.sleep(SHORT_DELAY_MS); |
355 |
< |
assertEquals(q.remainingCapacity(), 0); |
335 |
> |
await(pleaseTake); |
336 |
> |
assertEquals(0, q.remainingCapacity()); |
337 |
|
assertEquals(0, q.take()); |
338 |
< |
Thread.sleep(SHORT_DELAY_MS); |
338 |
> |
|
339 |
> |
await(pleaseInterrupt); |
340 |
> |
assertThreadStaysAlive(t); |
341 |
|
t.interrupt(); |
342 |
< |
t.join(); |
343 |
< |
assertEquals(q.remainingCapacity(), 0); |
342 |
> |
awaitTermination(t); |
343 |
> |
assertEquals(0, q.remainingCapacity()); |
344 |
|
} |
345 |
|
|
346 |
|
/** |
348 |
|
*/ |
349 |
|
public void testTimedOffer() throws InterruptedException { |
350 |
|
final ArrayBlockingQueue q = new ArrayBlockingQueue(2); |
351 |
< |
Thread t = new Thread(new CheckedRunnable() { |
351 |
> |
final CountDownLatch pleaseInterrupt = new CountDownLatch(1); |
352 |
> |
Thread t = newStartedThread(new CheckedRunnable() { |
353 |
|
public void realRun() throws InterruptedException { |
354 |
|
q.put(new Object()); |
355 |
|
q.put(new Object()); |
356 |
< |
assertFalse(q.offer(new Object(), SHORT_DELAY_MS/2, MILLISECONDS)); |
356 |
> |
long startTime = System.nanoTime(); |
357 |
> |
assertFalse(q.offer(new Object(), timeoutMillis(), MILLISECONDS)); |
358 |
> |
assertTrue(millisElapsedSince(startTime) >= timeoutMillis()); |
359 |
> |
pleaseInterrupt.countDown(); |
360 |
|
try { |
361 |
< |
q.offer(new Object(), LONG_DELAY_MS, MILLISECONDS); |
361 |
> |
q.offer(new Object(), 2 * LONG_DELAY_MS, MILLISECONDS); |
362 |
|
shouldThrow(); |
363 |
|
} catch (InterruptedException success) {} |
364 |
|
}}); |
365 |
|
|
366 |
< |
t.start(); |
367 |
< |
Thread.sleep(SHORT_DELAY_MS); |
366 |
> |
await(pleaseInterrupt); |
367 |
> |
assertThreadStaysAlive(t); |
368 |
|
t.interrupt(); |
369 |
< |
t.join(); |
369 |
> |
awaitTermination(t); |
370 |
|
} |
371 |
|
|
372 |
|
/** |
380 |
|
} |
381 |
|
|
382 |
|
/** |
396 |
– |
* take blocks interruptibly when empty |
397 |
– |
*/ |
398 |
– |
public void testTakeFromEmpty() throws InterruptedException { |
399 |
– |
final ArrayBlockingQueue q = new ArrayBlockingQueue(2); |
400 |
– |
Thread t = new ThreadShouldThrow(InterruptedException.class) { |
401 |
– |
public void realRun() throws InterruptedException { |
402 |
– |
q.take(); |
403 |
– |
}}; |
404 |
– |
|
405 |
– |
t.start(); |
406 |
– |
Thread.sleep(SHORT_DELAY_MS); |
407 |
– |
t.interrupt(); |
408 |
– |
t.join(); |
409 |
– |
} |
410 |
– |
|
411 |
– |
/** |
383 |
|
* Take removes existing elements until empty, then blocks interruptibly |
384 |
|
*/ |
385 |
|
public void testBlockingTake() throws InterruptedException { |
386 |
|
final ArrayBlockingQueue q = populatedQueue(SIZE); |
387 |
< |
Thread t = new Thread(new CheckedRunnable() { |
387 |
> |
final CountDownLatch pleaseInterrupt = new CountDownLatch(1); |
388 |
> |
Thread t = newStartedThread(new CheckedRunnable() { |
389 |
|
public void realRun() throws InterruptedException { |
390 |
|
for (int i = 0; i < SIZE; ++i) { |
391 |
|
assertEquals(i, q.take()); |
392 |
|
} |
393 |
+ |
|
394 |
+ |
Thread.currentThread().interrupt(); |
395 |
+ |
try { |
396 |
+ |
q.take(); |
397 |
+ |
shouldThrow(); |
398 |
+ |
} catch (InterruptedException success) {} |
399 |
+ |
assertFalse(Thread.interrupted()); |
400 |
+ |
|
401 |
+ |
pleaseInterrupt.countDown(); |
402 |
|
try { |
403 |
|
q.take(); |
404 |
|
shouldThrow(); |
405 |
|
} catch (InterruptedException success) {} |
406 |
+ |
assertFalse(Thread.interrupted()); |
407 |
|
}}); |
408 |
|
|
409 |
< |
t.start(); |
410 |
< |
Thread.sleep(SHORT_DELAY_MS); |
409 |
> |
await(pleaseInterrupt); |
410 |
> |
assertThreadStaysAlive(t); |
411 |
|
t.interrupt(); |
412 |
< |
t.join(); |
412 |
> |
awaitTermination(t); |
413 |
|
} |
414 |
|
|
433 |
– |
|
415 |
|
/** |
416 |
|
* poll succeeds unless empty |
417 |
|
*/ |
424 |
|
} |
425 |
|
|
426 |
|
/** |
427 |
< |
* timed pool with zero timeout succeeds when non-empty, else times out |
427 |
> |
* timed poll with zero timeout succeeds when non-empty, else times out |
428 |
|
*/ |
429 |
|
public void testTimedPoll0() throws InterruptedException { |
430 |
|
ArrayBlockingQueue q = populatedQueue(SIZE); |
432 |
|
assertEquals(i, q.poll(0, MILLISECONDS)); |
433 |
|
} |
434 |
|
assertNull(q.poll(0, MILLISECONDS)); |
435 |
+ |
checkEmpty(q); |
436 |
|
} |
437 |
|
|
438 |
|
/** |
439 |
< |
* timed pool with nonzero timeout succeeds when non-empty, else times out |
439 |
> |
* timed poll with nonzero timeout succeeds when non-empty, else times out |
440 |
|
*/ |
441 |
|
public void testTimedPoll() throws InterruptedException { |
442 |
|
ArrayBlockingQueue q = populatedQueue(SIZE); |
443 |
|
for (int i = 0; i < SIZE; ++i) { |
444 |
< |
assertEquals(i, q.poll(SHORT_DELAY_MS, MILLISECONDS)); |
445 |
< |
} |
446 |
< |
assertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS)); |
444 |
> |
long startTime = System.nanoTime(); |
445 |
> |
assertEquals(i, q.poll(LONG_DELAY_MS, MILLISECONDS)); |
446 |
> |
assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS); |
447 |
> |
} |
448 |
> |
long startTime = System.nanoTime(); |
449 |
> |
assertNull(q.poll(timeoutMillis(), MILLISECONDS)); |
450 |
> |
assertTrue(millisElapsedSince(startTime) >= timeoutMillis()); |
451 |
> |
checkEmpty(q); |
452 |
|
} |
453 |
|
|
454 |
|
/** |
456 |
|
* returning timeout status |
457 |
|
*/ |
458 |
|
public void testInterruptedTimedPoll() throws InterruptedException { |
459 |
< |
Thread t = new Thread(new CheckedRunnable() { |
459 |
> |
final BlockingQueue<Integer> q = populatedQueue(SIZE); |
460 |
> |
final CountDownLatch aboutToWait = new CountDownLatch(1); |
461 |
> |
Thread t = newStartedThread(new CheckedRunnable() { |
462 |
|
public void realRun() throws InterruptedException { |
463 |
< |
ArrayBlockingQueue q = populatedQueue(SIZE); |
463 |
> |
long startTime = System.nanoTime(); |
464 |
|
for (int i = 0; i < SIZE; ++i) { |
465 |
< |
assertEquals(i, q.poll(SHORT_DELAY_MS, MILLISECONDS));; |
465 |
> |
assertEquals(i, (int) q.poll(LONG_DELAY_MS, MILLISECONDS)); |
466 |
|
} |
467 |
+ |
aboutToWait.countDown(); |
468 |
|
try { |
469 |
< |
q.poll(SMALL_DELAY_MS, MILLISECONDS); |
469 |
> |
q.poll(LONG_DELAY_MS, MILLISECONDS); |
470 |
|
shouldThrow(); |
471 |
< |
} catch (InterruptedException success) {} |
471 |
> |
} catch (InterruptedException success) { |
472 |
> |
assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS); |
473 |
> |
} |
474 |
|
}}); |
475 |
|
|
476 |
< |
t.start(); |
477 |
< |
Thread.sleep(SHORT_DELAY_MS); |
476 |
> |
await(aboutToWait); |
477 |
> |
waitForThreadToEnterWaitState(t); |
478 |
|
t.interrupt(); |
479 |
< |
t.join(); |
479 |
> |
awaitTermination(t); |
480 |
> |
checkEmpty(q); |
481 |
|
} |
482 |
|
|
483 |
|
/** |
524 |
|
} |
525 |
|
|
526 |
|
/** |
534 |
– |
* remove(x) removes x and returns true if present |
535 |
– |
*/ |
536 |
– |
public void testRemoveElement() { |
537 |
– |
ArrayBlockingQueue q = populatedQueue(SIZE); |
538 |
– |
for (int i = 1; i < SIZE; i+=2) { |
539 |
– |
assertTrue(q.remove(new Integer(i))); |
540 |
– |
} |
541 |
– |
for (int i = 0; i < SIZE; i+=2) { |
542 |
– |
assertTrue(q.remove(new Integer(i))); |
543 |
– |
assertFalse(q.remove(new Integer(i+1))); |
544 |
– |
} |
545 |
– |
assertTrue(q.isEmpty()); |
546 |
– |
} |
547 |
– |
|
548 |
– |
/** |
527 |
|
* contains(x) reports true when elements added but not yet removed |
528 |
|
*/ |
529 |
|
public void testContains() { |
579 |
|
assertTrue(changed); |
580 |
|
|
581 |
|
assertTrue(q.containsAll(p)); |
582 |
< |
assertEquals(SIZE-i, q.size()); |
582 |
> |
assertEquals(SIZE - i, q.size()); |
583 |
|
p.remove(); |
584 |
|
} |
585 |
|
} |
592 |
|
ArrayBlockingQueue q = populatedQueue(SIZE); |
593 |
|
ArrayBlockingQueue p = populatedQueue(i); |
594 |
|
assertTrue(q.removeAll(p)); |
595 |
< |
assertEquals(SIZE-i, q.size()); |
595 |
> |
assertEquals(SIZE - i, q.size()); |
596 |
|
for (int j = 0; j < i; ++j) { |
597 |
< |
Integer I = (Integer)(p.remove()); |
598 |
< |
assertFalse(q.contains(I)); |
597 |
> |
Integer x = (Integer)(p.remove()); |
598 |
> |
assertFalse(q.contains(x)); |
599 |
|
} |
600 |
|
} |
601 |
|
} |
602 |
|
|
603 |
< |
/** |
604 |
< |
* toArray contains all elements |
627 |
< |
*/ |
628 |
< |
public void testToArray() throws InterruptedException { |
629 |
< |
ArrayBlockingQueue q = populatedQueue(SIZE); |
603 |
> |
void checkToArray(ArrayBlockingQueue q) { |
604 |
> |
int size = q.size(); |
605 |
|
Object[] o = q.toArray(); |
606 |
< |
for (int i = 0; i < o.length; i++) |
607 |
< |
assertEquals(o[i], q.take()); |
606 |
> |
assertEquals(size, o.length); |
607 |
> |
Iterator it = q.iterator(); |
608 |
> |
for (int i = 0; i < size; i++) { |
609 |
> |
Integer x = (Integer) it.next(); |
610 |
> |
assertEquals((Integer)o[0] + i, (int) x); |
611 |
> |
assertSame(o[i], x); |
612 |
> |
} |
613 |
|
} |
614 |
|
|
615 |
|
/** |
616 |
< |
* toArray(a) contains all elements |
616 |
> |
* toArray() contains all elements in FIFO order |
617 |
|
*/ |
618 |
< |
public void testToArray2() throws InterruptedException { |
619 |
< |
ArrayBlockingQueue q = populatedQueue(SIZE); |
620 |
< |
Integer[] ints = new Integer[SIZE]; |
621 |
< |
ints = (Integer[])q.toArray(ints); |
622 |
< |
for (int i = 0; i < ints.length; i++) |
623 |
< |
assertEquals(ints[i], q.take()); |
618 |
> |
public void testToArray() { |
619 |
> |
ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE); |
620 |
> |
for (int i = 0; i < SIZE; i++) { |
621 |
> |
checkToArray(q); |
622 |
> |
q.add(i); |
623 |
> |
} |
624 |
> |
// Provoke wraparound |
625 |
> |
for (int i = 0; i < SIZE; i++) { |
626 |
> |
checkToArray(q); |
627 |
> |
assertEquals(i, q.poll()); |
628 |
> |
checkToArray(q); |
629 |
> |
q.add(SIZE + i); |
630 |
> |
} |
631 |
> |
for (int i = 0; i < SIZE; i++) { |
632 |
> |
checkToArray(q); |
633 |
> |
assertEquals(SIZE + i, q.poll()); |
634 |
> |
} |
635 |
> |
} |
636 |
> |
|
637 |
> |
void checkToArray2(ArrayBlockingQueue q) { |
638 |
> |
int size = q.size(); |
639 |
> |
Integer[] a1 = (size == 0) ? null : new Integer[size - 1]; |
640 |
> |
Integer[] a2 = new Integer[size]; |
641 |
> |
Integer[] a3 = new Integer[size + 2]; |
642 |
> |
if (size > 0) Arrays.fill(a1, 42); |
643 |
> |
Arrays.fill(a2, 42); |
644 |
> |
Arrays.fill(a3, 42); |
645 |
> |
Integer[] b1 = (size == 0) ? null : (Integer[]) q.toArray(a1); |
646 |
> |
Integer[] b2 = (Integer[]) q.toArray(a2); |
647 |
> |
Integer[] b3 = (Integer[]) q.toArray(a3); |
648 |
> |
assertSame(a2, b2); |
649 |
> |
assertSame(a3, b3); |
650 |
> |
Iterator it = q.iterator(); |
651 |
> |
for (int i = 0; i < size; i++) { |
652 |
> |
Integer x = (Integer) it.next(); |
653 |
> |
assertSame(b1[i], x); |
654 |
> |
assertEquals(b1[0] + i, (int) x); |
655 |
> |
assertSame(b2[i], x); |
656 |
> |
assertSame(b3[i], x); |
657 |
> |
} |
658 |
> |
assertNull(a3[size]); |
659 |
> |
assertEquals(42, (int) a3[size + 1]); |
660 |
> |
if (size > 0) { |
661 |
> |
assertNotSame(a1, b1); |
662 |
> |
assertEquals(size, b1.length); |
663 |
> |
for (int i = 0; i < a1.length; i++) { |
664 |
> |
assertEquals(42, (int) a1[i]); |
665 |
> |
} |
666 |
> |
} |
667 |
|
} |
668 |
|
|
669 |
|
/** |
670 |
< |
* toArray(null) throws NPE |
670 |
> |
* toArray(a) contains all elements in FIFO order |
671 |
|
*/ |
672 |
< |
public void testToArray_BadArg() { |
673 |
< |
ArrayBlockingQueue q = populatedQueue(SIZE); |
674 |
< |
try { |
675 |
< |
Object o[] = q.toArray(null); |
676 |
< |
shouldThrow(); |
677 |
< |
} catch (NullPointerException success) {} |
672 |
> |
public void testToArray2() { |
673 |
> |
ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE); |
674 |
> |
for (int i = 0; i < SIZE; i++) { |
675 |
> |
checkToArray2(q); |
676 |
> |
q.add(i); |
677 |
> |
} |
678 |
> |
// Provoke wraparound |
679 |
> |
for (int i = 0; i < SIZE; i++) { |
680 |
> |
checkToArray2(q); |
681 |
> |
assertEquals(i, q.poll()); |
682 |
> |
checkToArray2(q); |
683 |
> |
q.add(SIZE + i); |
684 |
> |
} |
685 |
> |
for (int i = 0; i < SIZE; i++) { |
686 |
> |
checkToArray2(q); |
687 |
> |
assertEquals(SIZE + i, q.poll()); |
688 |
> |
} |
689 |
|
} |
690 |
|
|
691 |
|
/** |
692 |
< |
* toArray with incompatible array type throws CCE |
692 |
> |
* toArray(incompatible array type) throws ArrayStoreException |
693 |
|
*/ |
694 |
|
public void testToArray1_BadArg() { |
695 |
|
ArrayBlockingQueue q = populatedQueue(SIZE); |
696 |
|
try { |
697 |
< |
Object o[] = q.toArray(new String[10]); |
697 |
> |
q.toArray(new String[10]); |
698 |
|
shouldThrow(); |
699 |
|
} catch (ArrayStoreException success) {} |
700 |
|
} |
701 |
|
|
668 |
– |
|
702 |
|
/** |
703 |
|
* iterator iterates through all elements |
704 |
|
*/ |
705 |
|
public void testIterator() throws InterruptedException { |
706 |
|
ArrayBlockingQueue q = populatedQueue(SIZE); |
707 |
|
Iterator it = q.iterator(); |
708 |
< |
while (it.hasNext()) { |
708 |
> |
int i; |
709 |
> |
for (i = 0; it.hasNext(); i++) |
710 |
> |
assertTrue(q.contains(it.next())); |
711 |
> |
assertEquals(i, SIZE); |
712 |
> |
assertIteratorExhausted(it); |
713 |
> |
|
714 |
> |
it = q.iterator(); |
715 |
> |
for (i = 0; it.hasNext(); i++) |
716 |
|
assertEquals(it.next(), q.take()); |
717 |
< |
} |
717 |
> |
assertEquals(i, SIZE); |
718 |
> |
assertIteratorExhausted(it); |
719 |
> |
} |
720 |
> |
|
721 |
> |
/** |
722 |
> |
* iterator of empty collection has no elements |
723 |
> |
*/ |
724 |
> |
public void testEmptyIterator() { |
725 |
> |
assertIteratorExhausted(new ArrayBlockingQueue(SIZE).iterator()); |
726 |
|
} |
727 |
|
|
728 |
|
/** |
777 |
|
assertEquals(0, q.size()); |
778 |
|
} |
779 |
|
|
732 |
– |
|
780 |
|
/** |
781 |
|
* toString contains toStrings of elements |
782 |
|
*/ |
784 |
|
ArrayBlockingQueue q = populatedQueue(SIZE); |
785 |
|
String s = q.toString(); |
786 |
|
for (int i = 0; i < SIZE; ++i) { |
787 |
< |
assertTrue(s.indexOf(String.valueOf(i)) >= 0); |
787 |
> |
assertTrue(s.contains(String.valueOf(i))); |
788 |
|
} |
789 |
|
} |
790 |
|
|
744 |
– |
|
791 |
|
/** |
792 |
|
* offer transfers elements across Executor tasks |
793 |
|
*/ |
795 |
|
final ArrayBlockingQueue q = new ArrayBlockingQueue(2); |
796 |
|
q.add(one); |
797 |
|
q.add(two); |
798 |
< |
ExecutorService executor = Executors.newFixedThreadPool(2); |
799 |
< |
executor.execute(new CheckedRunnable() { |
800 |
< |
public void realRun() throws InterruptedException { |
801 |
< |
assertFalse(q.offer(three)); |
802 |
< |
assertTrue(q.offer(three, MEDIUM_DELAY_MS, MILLISECONDS)); |
803 |
< |
assertEquals(0, q.remainingCapacity()); |
804 |
< |
}}); |
805 |
< |
|
806 |
< |
executor.execute(new CheckedRunnable() { |
807 |
< |
public void realRun() throws InterruptedException { |
808 |
< |
Thread.sleep(SMALL_DELAY_MS); |
809 |
< |
assertSame(one, q.take()); |
810 |
< |
}}); |
811 |
< |
|
812 |
< |
joinPool(executor); |
798 |
> |
final CheckedBarrier threadsStarted = new CheckedBarrier(2); |
799 |
> |
final ExecutorService executor = Executors.newFixedThreadPool(2); |
800 |
> |
try (PoolCleaner cleaner = cleaner(executor)) { |
801 |
> |
executor.execute(new CheckedRunnable() { |
802 |
> |
public void realRun() throws InterruptedException { |
803 |
> |
assertFalse(q.offer(three)); |
804 |
> |
threadsStarted.await(); |
805 |
> |
assertTrue(q.offer(three, LONG_DELAY_MS, MILLISECONDS)); |
806 |
> |
assertEquals(0, q.remainingCapacity()); |
807 |
> |
}}); |
808 |
> |
|
809 |
> |
executor.execute(new CheckedRunnable() { |
810 |
> |
public void realRun() throws InterruptedException { |
811 |
> |
threadsStarted.await(); |
812 |
> |
assertEquals(0, q.remainingCapacity()); |
813 |
> |
assertSame(one, q.take()); |
814 |
> |
}}); |
815 |
> |
} |
816 |
|
} |
817 |
|
|
818 |
|
/** |
819 |
< |
* poll retrieves elements across Executor threads |
819 |
> |
* timed poll retrieves elements across Executor threads |
820 |
|
*/ |
821 |
|
public void testPollInExecutor() { |
822 |
|
final ArrayBlockingQueue q = new ArrayBlockingQueue(2); |
823 |
< |
ExecutorService executor = Executors.newFixedThreadPool(2); |
824 |
< |
executor.execute(new CheckedRunnable() { |
825 |
< |
public void realRun() throws InterruptedException { |
826 |
< |
assertNull(q.poll()); |
827 |
< |
assertSame(one, q.poll(MEDIUM_DELAY_MS, MILLISECONDS)); |
828 |
< |
assertTrue(q.isEmpty()); |
829 |
< |
}}); |
830 |
< |
|
831 |
< |
executor.execute(new CheckedRunnable() { |
832 |
< |
public void realRun() throws InterruptedException { |
833 |
< |
Thread.sleep(SMALL_DELAY_MS); |
834 |
< |
q.put(one); |
835 |
< |
}}); |
836 |
< |
|
837 |
< |
joinPool(executor); |
823 |
> |
final CheckedBarrier threadsStarted = new CheckedBarrier(2); |
824 |
> |
final ExecutorService executor = Executors.newFixedThreadPool(2); |
825 |
> |
try (PoolCleaner cleaner = cleaner(executor)) { |
826 |
> |
executor.execute(new CheckedRunnable() { |
827 |
> |
public void realRun() throws InterruptedException { |
828 |
> |
assertNull(q.poll()); |
829 |
> |
threadsStarted.await(); |
830 |
> |
assertSame(one, q.poll(LONG_DELAY_MS, MILLISECONDS)); |
831 |
> |
checkEmpty(q); |
832 |
> |
}}); |
833 |
> |
|
834 |
> |
executor.execute(new CheckedRunnable() { |
835 |
> |
public void realRun() throws InterruptedException { |
836 |
> |
threadsStarted.await(); |
837 |
> |
q.put(one); |
838 |
> |
}}); |
839 |
> |
} |
840 |
|
} |
841 |
|
|
842 |
|
/** |
843 |
|
* A deserialized serialized queue has same elements in same order |
844 |
|
*/ |
845 |
|
public void testSerialization() throws Exception { |
846 |
< |
ArrayBlockingQueue q = populatedQueue(SIZE); |
847 |
< |
|
797 |
< |
ByteArrayOutputStream bout = new ByteArrayOutputStream(10000); |
798 |
< |
ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout)); |
799 |
< |
out.writeObject(q); |
800 |
< |
out.close(); |
801 |
< |
|
802 |
< |
ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray()); |
803 |
< |
ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin)); |
804 |
< |
ArrayBlockingQueue r = (ArrayBlockingQueue)in.readObject(); |
805 |
< |
assertEquals(q.size(), r.size()); |
806 |
< |
while (!q.isEmpty()) |
807 |
< |
assertEquals(q.remove(), r.remove()); |
808 |
< |
} |
846 |
> |
Queue x = populatedQueue(SIZE); |
847 |
> |
Queue y = serialClone(x); |
848 |
|
|
849 |
< |
/** |
850 |
< |
* drainTo(null) throws NPE |
851 |
< |
*/ |
852 |
< |
public void testDrainToNull() { |
853 |
< |
ArrayBlockingQueue q = populatedQueue(SIZE); |
854 |
< |
try { |
855 |
< |
q.drainTo(null); |
856 |
< |
shouldThrow(); |
857 |
< |
} catch (NullPointerException success) {} |
819 |
< |
} |
820 |
< |
|
821 |
< |
/** |
822 |
< |
* drainTo(this) throws IAE |
823 |
< |
*/ |
824 |
< |
public void testDrainToSelf() { |
825 |
< |
ArrayBlockingQueue q = populatedQueue(SIZE); |
826 |
< |
try { |
827 |
< |
q.drainTo(q); |
828 |
< |
shouldThrow(); |
829 |
< |
} catch (IllegalArgumentException success) {} |
849 |
> |
assertNotSame(x, y); |
850 |
> |
assertEquals(x.size(), y.size()); |
851 |
> |
assertEquals(x.toString(), y.toString()); |
852 |
> |
assertTrue(Arrays.equals(x.toArray(), y.toArray())); |
853 |
> |
while (!x.isEmpty()) { |
854 |
> |
assertFalse(y.isEmpty()); |
855 |
> |
assertEquals(x.remove(), y.remove()); |
856 |
> |
} |
857 |
> |
assertTrue(y.isEmpty()); |
858 |
|
} |
859 |
|
|
860 |
|
/** |
864 |
|
ArrayBlockingQueue q = populatedQueue(SIZE); |
865 |
|
ArrayList l = new ArrayList(); |
866 |
|
q.drainTo(l); |
867 |
< |
assertEquals(q.size(), 0); |
868 |
< |
assertEquals(l.size(), SIZE); |
867 |
> |
assertEquals(0, q.size()); |
868 |
> |
assertEquals(SIZE, l.size()); |
869 |
|
for (int i = 0; i < SIZE; ++i) |
870 |
|
assertEquals(l.get(i), new Integer(i)); |
871 |
|
q.add(zero); |
875 |
|
assertTrue(q.contains(one)); |
876 |
|
l.clear(); |
877 |
|
q.drainTo(l); |
878 |
< |
assertEquals(q.size(), 0); |
879 |
< |
assertEquals(l.size(), 2); |
878 |
> |
assertEquals(0, q.size()); |
879 |
> |
assertEquals(2, l.size()); |
880 |
|
for (int i = 0; i < 2; ++i) |
881 |
|
assertEquals(l.get(i), new Integer(i)); |
882 |
|
} |
888 |
|
final ArrayBlockingQueue q = populatedQueue(SIZE); |
889 |
|
Thread t = new Thread(new CheckedRunnable() { |
890 |
|
public void realRun() throws InterruptedException { |
891 |
< |
q.put(new Integer(SIZE+1)); |
891 |
> |
q.put(new Integer(SIZE + 1)); |
892 |
|
}}); |
893 |
|
|
894 |
|
t.start(); |
902 |
|
} |
903 |
|
|
904 |
|
/** |
905 |
< |
* drainTo(null, n) throws NPE |
878 |
< |
*/ |
879 |
< |
public void testDrainToNullN() { |
880 |
< |
ArrayBlockingQueue q = populatedQueue(SIZE); |
881 |
< |
try { |
882 |
< |
q.drainTo(null, 0); |
883 |
< |
shouldThrow(); |
884 |
< |
} catch (NullPointerException success) {} |
885 |
< |
} |
886 |
< |
|
887 |
< |
/** |
888 |
< |
* drainTo(this, n) throws IAE |
889 |
< |
*/ |
890 |
< |
public void testDrainToSelfN() { |
891 |
< |
ArrayBlockingQueue q = populatedQueue(SIZE); |
892 |
< |
try { |
893 |
< |
q.drainTo(q, 0); |
894 |
< |
shouldThrow(); |
895 |
< |
} catch (IllegalArgumentException success) {} |
896 |
< |
} |
897 |
< |
|
898 |
< |
/** |
899 |
< |
* drainTo(c, n) empties first max {n, size} elements of queue into c |
905 |
> |
* drainTo(c, n) empties first min(n, size) elements of queue into c |
906 |
|
*/ |
907 |
|
public void testDrainToN() { |
908 |
< |
ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE*2); |
908 |
> |
ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE * 2); |
909 |
|
for (int i = 0; i < SIZE + 2; ++i) { |
910 |
|
for (int j = 0; j < SIZE; j++) |
911 |
|
assertTrue(q.offer(new Integer(j))); |
912 |
|
ArrayList l = new ArrayList(); |
913 |
|
q.drainTo(l, i); |
914 |
< |
int k = (i < SIZE)? i : SIZE; |
915 |
< |
assertEquals(l.size(), k); |
916 |
< |
assertEquals(q.size(), SIZE-k); |
914 |
> |
int k = (i < SIZE) ? i : SIZE; |
915 |
> |
assertEquals(k, l.size()); |
916 |
> |
assertEquals(SIZE - k, q.size()); |
917 |
|
for (int j = 0; j < k; ++j) |
918 |
|
assertEquals(l.get(j), new Integer(j)); |
919 |
< |
while (q.poll() != null) ; |
919 |
> |
do {} while (q.poll() != null); |
920 |
|
} |
921 |
|
} |
922 |
|
|
923 |
+ |
/** |
924 |
+ |
* remove(null), contains(null) always return false |
925 |
+ |
*/ |
926 |
+ |
public void testNeverContainsNull() { |
927 |
+ |
Collection<?>[] qs = { |
928 |
+ |
new ArrayBlockingQueue<Object>(10), |
929 |
+ |
populatedQueue(2), |
930 |
+ |
}; |
931 |
+ |
|
932 |
+ |
for (Collection<?> q : qs) { |
933 |
+ |
assertFalse(q.contains(null)); |
934 |
+ |
assertFalse(q.remove(null)); |
935 |
+ |
} |
936 |
+ |
} |
937 |
|
} |