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/publicdomain/zero/1.0/ |
5 |
* Other contributors include Andrew Wright, Jeffrey Hayes, |
6 |
* Pat Fisher, Mike Judd. |
7 |
*/ |
8 |
|
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import static java.util.concurrent.TimeUnit.MILLISECONDS; |
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; |
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|
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import junit.framework.Test; |
24 |
|
25 |
public class ArrayBlockingQueueTest extends JSR166TestCase { |
26 |
|
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public static class Fair extends BlockingQueueTest { |
28 |
protected BlockingQueue emptyCollection() { |
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return new ArrayBlockingQueue(SIZE, true); |
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} |
31 |
} |
32 |
|
33 |
public static class NonFair extends BlockingQueueTest { |
34 |
protected BlockingQueue emptyCollection() { |
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return new ArrayBlockingQueue(SIZE, false); |
36 |
} |
37 |
} |
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|
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public static void main(String[] args) { |
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junit.textui.TestRunner.run(suite()); |
41 |
} |
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|
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public static Test suite() { |
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return newTestSuite(ArrayBlockingQueueTest.class, |
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new Fair().testSuite(), |
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new NonFair().testSuite()); |
47 |
} |
48 |
|
49 |
/** |
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* Returns a new queue of given size containing consecutive |
51 |
* Integers 0 ... n. |
52 |
*/ |
53 |
private ArrayBlockingQueue<Integer> populatedQueue(int n) { |
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ArrayBlockingQueue<Integer> q = new ArrayBlockingQueue<Integer>(n); |
55 |
assertTrue(q.isEmpty()); |
56 |
for (int i = 0; i < n; i++) |
57 |
assertTrue(q.offer(new Integer(i))); |
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assertFalse(q.isEmpty()); |
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assertEquals(0, q.remainingCapacity()); |
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assertEquals(n, q.size()); |
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return q; |
62 |
} |
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|
64 |
/** |
65 |
* A new queue has the indicated capacity |
66 |
*/ |
67 |
public void testConstructor1() { |
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assertEquals(SIZE, new ArrayBlockingQueue(SIZE).remainingCapacity()); |
69 |
} |
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|
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/** |
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* Constructor throws IAE if capacity argument nonpositive |
73 |
*/ |
74 |
public void testConstructor2() { |
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try { |
76 |
new ArrayBlockingQueue(0); |
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shouldThrow(); |
78 |
} catch (IllegalArgumentException success) {} |
79 |
} |
80 |
|
81 |
/** |
82 |
* Initializing from null Collection throws NPE |
83 |
*/ |
84 |
public void testConstructor3() { |
85 |
try { |
86 |
new ArrayBlockingQueue(1, true, null); |
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shouldThrow(); |
88 |
} catch (NullPointerException success) {} |
89 |
} |
90 |
|
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/** |
92 |
* Initializing from Collection of null elements throws NPE |
93 |
*/ |
94 |
public void testConstructor4() { |
95 |
Collection<Integer> elements = Arrays.asList(new Integer[SIZE]); |
96 |
try { |
97 |
new ArrayBlockingQueue(SIZE, false, elements); |
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shouldThrow(); |
99 |
} catch (NullPointerException success) {} |
100 |
} |
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|
102 |
/** |
103 |
* Initializing from Collection with some null elements throws NPE |
104 |
*/ |
105 |
public void testConstructor5() { |
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Integer[] ints = new Integer[SIZE]; |
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for (int i = 0; i < SIZE-1; ++i) |
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ints[i] = i; |
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Collection<Integer> elements = Arrays.asList(ints); |
110 |
try { |
111 |
new ArrayBlockingQueue(SIZE, false, Arrays.asList(ints)); |
112 |
shouldThrow(); |
113 |
} catch (NullPointerException success) {} |
114 |
} |
115 |
|
116 |
/** |
117 |
* Initializing from too large collection throws IAE |
118 |
*/ |
119 |
public void testConstructor6() { |
120 |
Integer[] ints = new Integer[SIZE]; |
121 |
for (int i = 0; i < SIZE; ++i) |
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ints[i] = i; |
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Collection<Integer> elements = Arrays.asList(ints); |
124 |
try { |
125 |
new ArrayBlockingQueue(SIZE - 1, false, elements); |
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shouldThrow(); |
127 |
} catch (IllegalArgumentException success) {} |
128 |
} |
129 |
|
130 |
/** |
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* Queue contains all elements of collection used to initialize |
132 |
*/ |
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public void testConstructor7() { |
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Integer[] ints = new Integer[SIZE]; |
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for (int i = 0; i < SIZE; ++i) |
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ints[i] = i; |
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Collection<Integer> elements = Arrays.asList(ints); |
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ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE, true, elements); |
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for (int i = 0; i < SIZE; ++i) |
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assertEquals(ints[i], q.poll()); |
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} |
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|
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/** |
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* Queue transitions from empty to full when elements added |
145 |
*/ |
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public void testEmptyFull() { |
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ArrayBlockingQueue q = new ArrayBlockingQueue(2); |
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assertTrue(q.isEmpty()); |
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assertEquals(2, q.remainingCapacity()); |
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q.add(one); |
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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)); |
156 |
} |
157 |
|
158 |
/** |
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* remainingCapacity decreases on add, increases on remove |
160 |
*/ |
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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()); |
166 |
q.remove(); |
167 |
} |
168 |
for (int i = 0; i < SIZE; ++i) { |
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assertEquals(SIZE-i, q.remainingCapacity()); |
170 |
assertEquals(i, q.size()); |
171 |
q.add(new Integer(i)); |
172 |
} |
173 |
} |
174 |
|
175 |
/** |
176 |
* Offer succeeds if not full; fails if full |
177 |
*/ |
178 |
public void testOffer() { |
179 |
ArrayBlockingQueue q = new ArrayBlockingQueue(1); |
180 |
assertTrue(q.offer(zero)); |
181 |
assertFalse(q.offer(one)); |
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} |
183 |
|
184 |
/** |
185 |
* add succeeds if not full; throws ISE if full |
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*/ |
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public void testAdd() { |
188 |
try { |
189 |
ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE); |
190 |
for (int i = 0; i < SIZE; ++i) { |
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assertTrue(q.add(new Integer(i))); |
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} |
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assertEquals(0, q.remainingCapacity()); |
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q.add(new Integer(SIZE)); |
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shouldThrow(); |
196 |
} catch (IllegalStateException success) {} |
197 |
} |
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|
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/** |
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* addAll(this) throws IAE |
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*/ |
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public void testAddAllSelf() { |
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try { |
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ArrayBlockingQueue q = populatedQueue(SIZE); |
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q.addAll(q); |
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shouldThrow(); |
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} catch (IllegalArgumentException success) {} |
208 |
} |
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|
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/** |
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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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*/ |
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public void testAddAll3() { |
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try { |
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ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE); |
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Integer[] ints = new Integer[SIZE]; |
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for (int i = 0; i < SIZE-1; ++i) |
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ints[i] = new Integer(i); |
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q.addAll(Arrays.asList(ints)); |
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shouldThrow(); |
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} catch (NullPointerException success) {} |
223 |
} |
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|
225 |
/** |
226 |
* addAll throws ISE if not enough room |
227 |
*/ |
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public void testAddAll4() { |
229 |
try { |
230 |
ArrayBlockingQueue q = new ArrayBlockingQueue(1); |
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Integer[] ints = new Integer[SIZE]; |
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for (int i = 0; i < SIZE; ++i) |
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ints[i] = new Integer(i); |
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q.addAll(Arrays.asList(ints)); |
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shouldThrow(); |
236 |
} catch (IllegalStateException success) {} |
237 |
} |
238 |
|
239 |
/** |
240 |
* Queue contains all elements, in traversal order, of successful addAll |
241 |
*/ |
242 |
public void testAddAll5() { |
243 |
Integer[] empty = new Integer[0]; |
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Integer[] ints = new Integer[SIZE]; |
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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); |
248 |
assertFalse(q.addAll(Arrays.asList(empty))); |
249 |
assertTrue(q.addAll(Arrays.asList(ints))); |
250 |
for (int i = 0; i < SIZE; ++i) |
251 |
assertEquals(ints[i], q.poll()); |
252 |
} |
253 |
|
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/** |
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* all elements successfully put are contained |
256 |
*/ |
257 |
public void testPut() throws InterruptedException { |
258 |
ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE); |
259 |
for (int i = 0; i < SIZE; ++i) { |
260 |
Integer I = new Integer(i); |
261 |
q.put(I); |
262 |
assertTrue(q.contains(I)); |
263 |
} |
264 |
assertEquals(0, q.remainingCapacity()); |
265 |
} |
266 |
|
267 |
/** |
268 |
* put blocks interruptibly if full |
269 |
*/ |
270 |
public void testBlockingPut() throws InterruptedException { |
271 |
final ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE); |
272 |
final CountDownLatch pleaseInterrupt = new CountDownLatch(1); |
273 |
Thread t = newStartedThread(new CheckedRunnable() { |
274 |
public void realRun() throws InterruptedException { |
275 |
for (int i = 0; i < SIZE; ++i) |
276 |
q.put(i); |
277 |
assertEquals(SIZE, q.size()); |
278 |
assertEquals(0, q.remainingCapacity()); |
279 |
|
280 |
Thread.currentThread().interrupt(); |
281 |
try { |
282 |
q.put(99); |
283 |
shouldThrow(); |
284 |
} catch (InterruptedException success) {} |
285 |
assertFalse(Thread.interrupted()); |
286 |
|
287 |
pleaseInterrupt.countDown(); |
288 |
try { |
289 |
q.put(99); |
290 |
shouldThrow(); |
291 |
} catch (InterruptedException success) {} |
292 |
assertFalse(Thread.interrupted()); |
293 |
}}); |
294 |
|
295 |
await(pleaseInterrupt); |
296 |
assertThreadStaysAlive(t); |
297 |
t.interrupt(); |
298 |
awaitTermination(t); |
299 |
assertEquals(SIZE, q.size()); |
300 |
assertEquals(0, q.remainingCapacity()); |
301 |
} |
302 |
|
303 |
/** |
304 |
* put blocks interruptibly waiting for take when full |
305 |
*/ |
306 |
public void testPutWithTake() throws InterruptedException { |
307 |
final int capacity = 2; |
308 |
final ArrayBlockingQueue q = new ArrayBlockingQueue(capacity); |
309 |
final CountDownLatch pleaseTake = new CountDownLatch(1); |
310 |
final CountDownLatch pleaseInterrupt = new CountDownLatch(1); |
311 |
Thread t = newStartedThread(new CheckedRunnable() { |
312 |
public void realRun() throws InterruptedException { |
313 |
for (int i = 0; i < capacity; i++) |
314 |
q.put(i); |
315 |
pleaseTake.countDown(); |
316 |
q.put(86); |
317 |
|
318 |
pleaseInterrupt.countDown(); |
319 |
try { |
320 |
q.put(99); |
321 |
shouldThrow(); |
322 |
} catch (InterruptedException success) {} |
323 |
assertFalse(Thread.interrupted()); |
324 |
}}); |
325 |
|
326 |
await(pleaseTake); |
327 |
assertEquals(0, q.remainingCapacity()); |
328 |
assertEquals(0, q.take()); |
329 |
|
330 |
await(pleaseInterrupt); |
331 |
assertThreadStaysAlive(t); |
332 |
t.interrupt(); |
333 |
awaitTermination(t); |
334 |
assertEquals(0, q.remainingCapacity()); |
335 |
} |
336 |
|
337 |
/** |
338 |
* timed offer times out if full and elements not taken |
339 |
*/ |
340 |
public void testTimedOffer() throws InterruptedException { |
341 |
final ArrayBlockingQueue q = new ArrayBlockingQueue(2); |
342 |
final CountDownLatch pleaseInterrupt = new CountDownLatch(1); |
343 |
Thread t = newStartedThread(new CheckedRunnable() { |
344 |
public void realRun() throws InterruptedException { |
345 |
q.put(new Object()); |
346 |
q.put(new Object()); |
347 |
long startTime = System.nanoTime(); |
348 |
assertFalse(q.offer(new Object(), timeoutMillis(), MILLISECONDS)); |
349 |
assertTrue(millisElapsedSince(startTime) >= timeoutMillis()); |
350 |
pleaseInterrupt.countDown(); |
351 |
try { |
352 |
q.offer(new Object(), 2 * LONG_DELAY_MS, MILLISECONDS); |
353 |
shouldThrow(); |
354 |
} catch (InterruptedException success) {} |
355 |
}}); |
356 |
|
357 |
await(pleaseInterrupt); |
358 |
assertThreadStaysAlive(t); |
359 |
t.interrupt(); |
360 |
awaitTermination(t); |
361 |
} |
362 |
|
363 |
/** |
364 |
* take retrieves elements in FIFO order |
365 |
*/ |
366 |
public void testTake() throws InterruptedException { |
367 |
ArrayBlockingQueue q = populatedQueue(SIZE); |
368 |
for (int i = 0; i < SIZE; ++i) { |
369 |
assertEquals(i, q.take()); |
370 |
} |
371 |
} |
372 |
|
373 |
/** |
374 |
* Take removes existing elements until empty, then blocks interruptibly |
375 |
*/ |
376 |
public void testBlockingTake() throws InterruptedException { |
377 |
final ArrayBlockingQueue q = populatedQueue(SIZE); |
378 |
final CountDownLatch pleaseInterrupt = new CountDownLatch(1); |
379 |
Thread t = newStartedThread(new CheckedRunnable() { |
380 |
public void realRun() throws InterruptedException { |
381 |
for (int i = 0; i < SIZE; ++i) { |
382 |
assertEquals(i, q.take()); |
383 |
} |
384 |
|
385 |
Thread.currentThread().interrupt(); |
386 |
try { |
387 |
q.take(); |
388 |
shouldThrow(); |
389 |
} catch (InterruptedException success) {} |
390 |
assertFalse(Thread.interrupted()); |
391 |
|
392 |
pleaseInterrupt.countDown(); |
393 |
try { |
394 |
q.take(); |
395 |
shouldThrow(); |
396 |
} catch (InterruptedException success) {} |
397 |
assertFalse(Thread.interrupted()); |
398 |
}}); |
399 |
|
400 |
await(pleaseInterrupt); |
401 |
assertThreadStaysAlive(t); |
402 |
t.interrupt(); |
403 |
awaitTermination(t); |
404 |
} |
405 |
|
406 |
/** |
407 |
* poll succeeds unless empty |
408 |
*/ |
409 |
public void testPoll() { |
410 |
ArrayBlockingQueue q = populatedQueue(SIZE); |
411 |
for (int i = 0; i < SIZE; ++i) { |
412 |
assertEquals(i, q.poll()); |
413 |
} |
414 |
assertNull(q.poll()); |
415 |
} |
416 |
|
417 |
/** |
418 |
* timed poll with zero timeout succeeds when non-empty, else times out |
419 |
*/ |
420 |
public void testTimedPoll0() throws InterruptedException { |
421 |
ArrayBlockingQueue q = populatedQueue(SIZE); |
422 |
for (int i = 0; i < SIZE; ++i) { |
423 |
assertEquals(i, q.poll(0, MILLISECONDS)); |
424 |
} |
425 |
assertNull(q.poll(0, MILLISECONDS)); |
426 |
checkEmpty(q); |
427 |
} |
428 |
|
429 |
/** |
430 |
* timed poll with nonzero timeout succeeds when non-empty, else times out |
431 |
*/ |
432 |
public void testTimedPoll() throws InterruptedException { |
433 |
ArrayBlockingQueue q = populatedQueue(SIZE); |
434 |
for (int i = 0; i < SIZE; ++i) { |
435 |
long startTime = System.nanoTime(); |
436 |
assertEquals(i, q.poll(LONG_DELAY_MS, MILLISECONDS)); |
437 |
assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS); |
438 |
} |
439 |
long startTime = System.nanoTime(); |
440 |
assertNull(q.poll(timeoutMillis(), MILLISECONDS)); |
441 |
assertTrue(millisElapsedSince(startTime) >= timeoutMillis()); |
442 |
checkEmpty(q); |
443 |
} |
444 |
|
445 |
/** |
446 |
* Interrupted timed poll throws InterruptedException instead of |
447 |
* returning timeout status |
448 |
*/ |
449 |
public void testInterruptedTimedPoll() throws InterruptedException { |
450 |
final BlockingQueue<Integer> q = populatedQueue(SIZE); |
451 |
final CountDownLatch aboutToWait = new CountDownLatch(1); |
452 |
Thread t = newStartedThread(new CheckedRunnable() { |
453 |
public void realRun() throws InterruptedException { |
454 |
for (int i = 0; i < SIZE; ++i) { |
455 |
long t0 = System.nanoTime(); |
456 |
assertEquals(i, (int) q.poll(LONG_DELAY_MS, MILLISECONDS)); |
457 |
assertTrue(millisElapsedSince(t0) < SMALL_DELAY_MS); |
458 |
} |
459 |
long t0 = System.nanoTime(); |
460 |
aboutToWait.countDown(); |
461 |
try { |
462 |
q.poll(MEDIUM_DELAY_MS, MILLISECONDS); |
463 |
shouldThrow(); |
464 |
} catch (InterruptedException success) { |
465 |
assertTrue(millisElapsedSince(t0) < MEDIUM_DELAY_MS); |
466 |
} |
467 |
}}); |
468 |
|
469 |
aboutToWait.await(); |
470 |
waitForThreadToEnterWaitState(t, SMALL_DELAY_MS); |
471 |
t.interrupt(); |
472 |
awaitTermination(t, MEDIUM_DELAY_MS); |
473 |
checkEmpty(q); |
474 |
} |
475 |
|
476 |
/** |
477 |
* peek returns next element, or null if empty |
478 |
*/ |
479 |
public void testPeek() { |
480 |
ArrayBlockingQueue q = populatedQueue(SIZE); |
481 |
for (int i = 0; i < SIZE; ++i) { |
482 |
assertEquals(i, q.peek()); |
483 |
assertEquals(i, q.poll()); |
484 |
assertTrue(q.peek() == null || |
485 |
!q.peek().equals(i)); |
486 |
} |
487 |
assertNull(q.peek()); |
488 |
} |
489 |
|
490 |
/** |
491 |
* element returns next element, or throws NSEE if empty |
492 |
*/ |
493 |
public void testElement() { |
494 |
ArrayBlockingQueue q = populatedQueue(SIZE); |
495 |
for (int i = 0; i < SIZE; ++i) { |
496 |
assertEquals(i, q.element()); |
497 |
assertEquals(i, q.poll()); |
498 |
} |
499 |
try { |
500 |
q.element(); |
501 |
shouldThrow(); |
502 |
} catch (NoSuchElementException success) {} |
503 |
} |
504 |
|
505 |
/** |
506 |
* remove removes next element, or throws NSEE if empty |
507 |
*/ |
508 |
public void testRemove() { |
509 |
ArrayBlockingQueue q = populatedQueue(SIZE); |
510 |
for (int i = 0; i < SIZE; ++i) { |
511 |
assertEquals(i, q.remove()); |
512 |
} |
513 |
try { |
514 |
q.remove(); |
515 |
shouldThrow(); |
516 |
} catch (NoSuchElementException success) {} |
517 |
} |
518 |
|
519 |
/** |
520 |
* contains(x) reports true when elements added but not yet removed |
521 |
*/ |
522 |
public void testContains() { |
523 |
ArrayBlockingQueue q = populatedQueue(SIZE); |
524 |
for (int i = 0; i < SIZE; ++i) { |
525 |
assertTrue(q.contains(new Integer(i))); |
526 |
assertEquals(i, q.poll()); |
527 |
assertFalse(q.contains(new Integer(i))); |
528 |
} |
529 |
} |
530 |
|
531 |
/** |
532 |
* clear removes all elements |
533 |
*/ |
534 |
public void testClear() { |
535 |
ArrayBlockingQueue q = populatedQueue(SIZE); |
536 |
q.clear(); |
537 |
assertTrue(q.isEmpty()); |
538 |
assertEquals(0, q.size()); |
539 |
assertEquals(SIZE, q.remainingCapacity()); |
540 |
q.add(one); |
541 |
assertFalse(q.isEmpty()); |
542 |
assertTrue(q.contains(one)); |
543 |
q.clear(); |
544 |
assertTrue(q.isEmpty()); |
545 |
} |
546 |
|
547 |
/** |
548 |
* containsAll(c) is true when c contains a subset of elements |
549 |
*/ |
550 |
public void testContainsAll() { |
551 |
ArrayBlockingQueue q = populatedQueue(SIZE); |
552 |
ArrayBlockingQueue p = new ArrayBlockingQueue(SIZE); |
553 |
for (int i = 0; i < SIZE; ++i) { |
554 |
assertTrue(q.containsAll(p)); |
555 |
assertFalse(p.containsAll(q)); |
556 |
p.add(new Integer(i)); |
557 |
} |
558 |
assertTrue(p.containsAll(q)); |
559 |
} |
560 |
|
561 |
/** |
562 |
* retainAll(c) retains only those elements of c and reports true if changed |
563 |
*/ |
564 |
public void testRetainAll() { |
565 |
ArrayBlockingQueue q = populatedQueue(SIZE); |
566 |
ArrayBlockingQueue p = populatedQueue(SIZE); |
567 |
for (int i = 0; i < SIZE; ++i) { |
568 |
boolean changed = q.retainAll(p); |
569 |
if (i == 0) |
570 |
assertFalse(changed); |
571 |
else |
572 |
assertTrue(changed); |
573 |
|
574 |
assertTrue(q.containsAll(p)); |
575 |
assertEquals(SIZE-i, q.size()); |
576 |
p.remove(); |
577 |
} |
578 |
} |
579 |
|
580 |
/** |
581 |
* removeAll(c) removes only those elements of c and reports true if changed |
582 |
*/ |
583 |
public void testRemoveAll() { |
584 |
for (int i = 1; i < SIZE; ++i) { |
585 |
ArrayBlockingQueue q = populatedQueue(SIZE); |
586 |
ArrayBlockingQueue p = populatedQueue(i); |
587 |
assertTrue(q.removeAll(p)); |
588 |
assertEquals(SIZE-i, q.size()); |
589 |
for (int j = 0; j < i; ++j) { |
590 |
Integer I = (Integer)(p.remove()); |
591 |
assertFalse(q.contains(I)); |
592 |
} |
593 |
} |
594 |
} |
595 |
|
596 |
void checkToArray(ArrayBlockingQueue q) { |
597 |
int size = q.size(); |
598 |
Object[] o = q.toArray(); |
599 |
assertEquals(size, o.length); |
600 |
Iterator it = q.iterator(); |
601 |
for (int i = 0; i < size; i++) { |
602 |
Integer x = (Integer) it.next(); |
603 |
assertEquals((Integer)o[0] + i, (int) x); |
604 |
assertSame(o[i], x); |
605 |
} |
606 |
} |
607 |
|
608 |
/** |
609 |
* toArray() contains all elements in FIFO order |
610 |
*/ |
611 |
public void testToArray() { |
612 |
ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE); |
613 |
for (int i = 0; i < SIZE; i++) { |
614 |
checkToArray(q); |
615 |
q.add(i); |
616 |
} |
617 |
// Provoke wraparound |
618 |
for (int i = 0; i < SIZE; i++) { |
619 |
checkToArray(q); |
620 |
assertEquals(i, q.poll()); |
621 |
checkToArray(q); |
622 |
q.add(SIZE+i); |
623 |
} |
624 |
for (int i = 0; i < SIZE; i++) { |
625 |
checkToArray(q); |
626 |
assertEquals(SIZE+i, q.poll()); |
627 |
} |
628 |
} |
629 |
|
630 |
void checkToArray2(ArrayBlockingQueue q) { |
631 |
int size = q.size(); |
632 |
Integer[] a1 = size == 0 ? null : new Integer[size-1]; |
633 |
Integer[] a2 = new Integer[size]; |
634 |
Integer[] a3 = new Integer[size+2]; |
635 |
if (size > 0) Arrays.fill(a1, 42); |
636 |
Arrays.fill(a2, 42); |
637 |
Arrays.fill(a3, 42); |
638 |
Integer[] b1 = size == 0 ? null : (Integer[]) q.toArray(a1); |
639 |
Integer[] b2 = (Integer[]) q.toArray(a2); |
640 |
Integer[] b3 = (Integer[]) q.toArray(a3); |
641 |
assertSame(a2, b2); |
642 |
assertSame(a3, b3); |
643 |
Iterator it = q.iterator(); |
644 |
for (int i = 0; i < size; i++) { |
645 |
Integer x = (Integer) it.next(); |
646 |
assertSame(b1[i], x); |
647 |
assertEquals(b1[0] + i, (int) x); |
648 |
assertSame(b2[i], x); |
649 |
assertSame(b3[i], x); |
650 |
} |
651 |
assertNull(a3[size]); |
652 |
assertEquals(42, (int) a3[size+1]); |
653 |
if (size > 0) { |
654 |
assertNotSame(a1, b1); |
655 |
assertEquals(size, b1.length); |
656 |
for (int i = 0; i < a1.length; i++) { |
657 |
assertEquals(42, (int) a1[i]); |
658 |
} |
659 |
} |
660 |
} |
661 |
|
662 |
/** |
663 |
* toArray(a) contains all elements in FIFO order |
664 |
*/ |
665 |
public void testToArray2() { |
666 |
ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE); |
667 |
for (int i = 0; i < SIZE; i++) { |
668 |
checkToArray2(q); |
669 |
q.add(i); |
670 |
} |
671 |
// Provoke wraparound |
672 |
for (int i = 0; i < SIZE; i++) { |
673 |
checkToArray2(q); |
674 |
assertEquals(i, q.poll()); |
675 |
checkToArray2(q); |
676 |
q.add(SIZE+i); |
677 |
} |
678 |
for (int i = 0; i < SIZE; i++) { |
679 |
checkToArray2(q); |
680 |
assertEquals(SIZE+i, q.poll()); |
681 |
} |
682 |
} |
683 |
|
684 |
/** |
685 |
* toArray(incompatible array type) throws ArrayStoreException |
686 |
*/ |
687 |
public void testToArray1_BadArg() { |
688 |
ArrayBlockingQueue q = populatedQueue(SIZE); |
689 |
try { |
690 |
q.toArray(new String[10]); |
691 |
shouldThrow(); |
692 |
} catch (ArrayStoreException success) {} |
693 |
} |
694 |
|
695 |
/** |
696 |
* iterator iterates through all elements |
697 |
*/ |
698 |
public void testIterator() throws InterruptedException { |
699 |
ArrayBlockingQueue q = populatedQueue(SIZE); |
700 |
Iterator it = q.iterator(); |
701 |
while (it.hasNext()) { |
702 |
assertEquals(it.next(), q.take()); |
703 |
} |
704 |
} |
705 |
|
706 |
/** |
707 |
* iterator.remove removes current element |
708 |
*/ |
709 |
public void testIteratorRemove() { |
710 |
final ArrayBlockingQueue q = new ArrayBlockingQueue(3); |
711 |
q.add(two); |
712 |
q.add(one); |
713 |
q.add(three); |
714 |
|
715 |
Iterator it = q.iterator(); |
716 |
it.next(); |
717 |
it.remove(); |
718 |
|
719 |
it = q.iterator(); |
720 |
assertSame(it.next(), one); |
721 |
assertSame(it.next(), three); |
722 |
assertFalse(it.hasNext()); |
723 |
} |
724 |
|
725 |
/** |
726 |
* iterator ordering is FIFO |
727 |
*/ |
728 |
public void testIteratorOrdering() { |
729 |
final ArrayBlockingQueue q = new ArrayBlockingQueue(3); |
730 |
q.add(one); |
731 |
q.add(two); |
732 |
q.add(three); |
733 |
|
734 |
assertEquals("queue should be full", 0, q.remainingCapacity()); |
735 |
|
736 |
int k = 0; |
737 |
for (Iterator it = q.iterator(); it.hasNext();) { |
738 |
assertEquals(++k, it.next()); |
739 |
} |
740 |
assertEquals(3, k); |
741 |
} |
742 |
|
743 |
/** |
744 |
* Modifications do not cause iterators to fail |
745 |
*/ |
746 |
public void testWeaklyConsistentIteration() { |
747 |
final ArrayBlockingQueue q = new ArrayBlockingQueue(3); |
748 |
q.add(one); |
749 |
q.add(two); |
750 |
q.add(three); |
751 |
for (Iterator it = q.iterator(); it.hasNext();) { |
752 |
q.remove(); |
753 |
it.next(); |
754 |
} |
755 |
assertEquals(0, q.size()); |
756 |
} |
757 |
|
758 |
/** |
759 |
* toString contains toStrings of elements |
760 |
*/ |
761 |
public void testToString() { |
762 |
ArrayBlockingQueue q = populatedQueue(SIZE); |
763 |
String s = q.toString(); |
764 |
for (int i = 0; i < SIZE; ++i) { |
765 |
assertTrue(s.contains(String.valueOf(i))); |
766 |
} |
767 |
} |
768 |
|
769 |
/** |
770 |
* offer transfers elements across Executor tasks |
771 |
*/ |
772 |
public void testOfferInExecutor() { |
773 |
final ArrayBlockingQueue q = new ArrayBlockingQueue(2); |
774 |
q.add(one); |
775 |
q.add(two); |
776 |
ExecutorService executor = Executors.newFixedThreadPool(2); |
777 |
final CheckedBarrier threadsStarted = new CheckedBarrier(2); |
778 |
executor.execute(new CheckedRunnable() { |
779 |
public void realRun() throws InterruptedException { |
780 |
assertFalse(q.offer(three)); |
781 |
threadsStarted.await(); |
782 |
assertTrue(q.offer(three, LONG_DELAY_MS, MILLISECONDS)); |
783 |
assertEquals(0, q.remainingCapacity()); |
784 |
}}); |
785 |
|
786 |
executor.execute(new CheckedRunnable() { |
787 |
public void realRun() throws InterruptedException { |
788 |
threadsStarted.await(); |
789 |
assertEquals(0, q.remainingCapacity()); |
790 |
assertSame(one, q.take()); |
791 |
}}); |
792 |
|
793 |
joinPool(executor); |
794 |
} |
795 |
|
796 |
/** |
797 |
* timed poll retrieves elements across Executor threads |
798 |
*/ |
799 |
public void testPollInExecutor() { |
800 |
final ArrayBlockingQueue q = new ArrayBlockingQueue(2); |
801 |
final CheckedBarrier threadsStarted = new CheckedBarrier(2); |
802 |
ExecutorService executor = Executors.newFixedThreadPool(2); |
803 |
executor.execute(new CheckedRunnable() { |
804 |
public void realRun() throws InterruptedException { |
805 |
assertNull(q.poll()); |
806 |
threadsStarted.await(); |
807 |
assertSame(one, q.poll(LONG_DELAY_MS, MILLISECONDS)); |
808 |
checkEmpty(q); |
809 |
}}); |
810 |
|
811 |
executor.execute(new CheckedRunnable() { |
812 |
public void realRun() throws InterruptedException { |
813 |
threadsStarted.await(); |
814 |
q.put(one); |
815 |
}}); |
816 |
|
817 |
joinPool(executor); |
818 |
} |
819 |
|
820 |
/** |
821 |
* A deserialized serialized queue has same elements in same order |
822 |
*/ |
823 |
public void testSerialization() throws Exception { |
824 |
Queue x = populatedQueue(SIZE); |
825 |
Queue y = serialClone(x); |
826 |
|
827 |
assertNotSame(x, y); |
828 |
assertEquals(x.size(), y.size()); |
829 |
assertEquals(x.toString(), y.toString()); |
830 |
assertTrue(Arrays.equals(x.toArray(), y.toArray())); |
831 |
while (!x.isEmpty()) { |
832 |
assertFalse(y.isEmpty()); |
833 |
assertEquals(x.remove(), y.remove()); |
834 |
} |
835 |
assertTrue(y.isEmpty()); |
836 |
} |
837 |
|
838 |
/** |
839 |
* drainTo(c) empties queue into another collection c |
840 |
*/ |
841 |
public void testDrainTo() { |
842 |
ArrayBlockingQueue q = populatedQueue(SIZE); |
843 |
ArrayList l = new ArrayList(); |
844 |
q.drainTo(l); |
845 |
assertEquals(0, q.size()); |
846 |
assertEquals(SIZE, l.size()); |
847 |
for (int i = 0; i < SIZE; ++i) |
848 |
assertEquals(l.get(i), new Integer(i)); |
849 |
q.add(zero); |
850 |
q.add(one); |
851 |
assertFalse(q.isEmpty()); |
852 |
assertTrue(q.contains(zero)); |
853 |
assertTrue(q.contains(one)); |
854 |
l.clear(); |
855 |
q.drainTo(l); |
856 |
assertEquals(0, q.size()); |
857 |
assertEquals(2, l.size()); |
858 |
for (int i = 0; i < 2; ++i) |
859 |
assertEquals(l.get(i), new Integer(i)); |
860 |
} |
861 |
|
862 |
/** |
863 |
* drainTo empties full queue, unblocking a waiting put. |
864 |
*/ |
865 |
public void testDrainToWithActivePut() throws InterruptedException { |
866 |
final ArrayBlockingQueue q = populatedQueue(SIZE); |
867 |
Thread t = new Thread(new CheckedRunnable() { |
868 |
public void realRun() throws InterruptedException { |
869 |
q.put(new Integer(SIZE+1)); |
870 |
}}); |
871 |
|
872 |
t.start(); |
873 |
ArrayList l = new ArrayList(); |
874 |
q.drainTo(l); |
875 |
assertTrue(l.size() >= SIZE); |
876 |
for (int i = 0; i < SIZE; ++i) |
877 |
assertEquals(l.get(i), new Integer(i)); |
878 |
t.join(); |
879 |
assertTrue(q.size() + l.size() >= SIZE); |
880 |
} |
881 |
|
882 |
/** |
883 |
* drainTo(c, n) empties first min(n, size) elements of queue into c |
884 |
*/ |
885 |
public void testDrainToN() { |
886 |
ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE*2); |
887 |
for (int i = 0; i < SIZE + 2; ++i) { |
888 |
for (int j = 0; j < SIZE; j++) |
889 |
assertTrue(q.offer(new Integer(j))); |
890 |
ArrayList l = new ArrayList(); |
891 |
q.drainTo(l, i); |
892 |
int k = (i < SIZE) ? i : SIZE; |
893 |
assertEquals(k, l.size()); |
894 |
assertEquals(SIZE-k, q.size()); |
895 |
for (int j = 0; j < k; ++j) |
896 |
assertEquals(l.get(j), new Integer(j)); |
897 |
do {} while (q.poll() != null); |
898 |
} |
899 |
} |
900 |
|
901 |
/** |
902 |
* remove(null), contains(null) always return false |
903 |
*/ |
904 |
public void testNeverContainsNull() { |
905 |
Collection<?>[] qs = { |
906 |
new ArrayBlockingQueue<Object>(10), |
907 |
populatedQueue(2), |
908 |
}; |
909 |
|
910 |
for (Collection<?> q : qs) { |
911 |
assertFalse(q.contains(null)); |
912 |
assertFalse(q.remove(null)); |
913 |
} |
914 |
} |
915 |
} |