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/* |
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* Written by Doug Lea with assistance from members of JCP JSR-166 |
3 |
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* Expert Group and released to the public domain, as explained at |
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* http://creativecommons.org/licenses/publicdomain |
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> |
* http://creativecommons.org/publicdomain/zero/1.0/ |
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* Other contributors include Andrew Wright, Jeffrey Hayes, |
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* Pat Fisher, Mike Judd. |
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*/ |
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|
9 |
< |
import junit.framework.*; |
10 |
< |
import java.util.*; |
11 |
< |
import java.util.concurrent.*; |
12 |
< |
import java.io.*; |
9 |
> |
import java.util.Arrays; |
10 |
> |
import java.util.Collection; |
11 |
> |
import java.util.Deque; |
12 |
> |
import java.util.Iterator; |
13 |
> |
import java.util.NoSuchElementException; |
14 |
> |
import java.util.Queue; |
15 |
> |
import java.util.Random; |
16 |
> |
import java.util.concurrent.ConcurrentLinkedDeque; |
17 |
> |
|
18 |
> |
import junit.framework.Test; |
19 |
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|
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public class ConcurrentLinkedDequeTest extends JSR166TestCase { |
21 |
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|
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public static void main(String[] args) { |
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< |
junit.textui.TestRunner.run(suite()); |
23 |
> |
main(suite(), args); |
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} |
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|
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public static Test suite() { |
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< |
return new TestSuite(ConcurrentLinkedDequeTest.class); |
27 |
> |
class Implementation implements CollectionImplementation { |
28 |
> |
public Class<?> klazz() { return ConcurrentLinkedDeque.class; } |
29 |
> |
public Collection emptyCollection() { return new ConcurrentLinkedDeque(); } |
30 |
> |
public Object makeElement(int i) { return i; } |
31 |
> |
public boolean isConcurrent() { return true; } |
32 |
> |
public boolean permitsNulls() { return false; } |
33 |
> |
} |
34 |
> |
return newTestSuite(ConcurrentLinkedDequeTest.class, |
35 |
> |
CollectionTest.testSuite(new Implementation())); |
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} |
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|
38 |
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/** |
39 |
< |
* Create a deque of given size containing consecutive |
40 |
< |
* Integers 0 ... n. |
39 |
> |
* Returns a new deque of given size containing consecutive |
40 |
> |
* Integers 0 ... n - 1. |
41 |
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*/ |
42 |
< |
private ConcurrentLinkedDeque populatedDeque(int n) { |
43 |
< |
ConcurrentLinkedDeque q = new ConcurrentLinkedDeque(); |
42 |
> |
private static ConcurrentLinkedDeque<Integer> populatedDeque(int n) { |
43 |
> |
ConcurrentLinkedDeque<Integer> q = new ConcurrentLinkedDeque<>(); |
44 |
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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()); |
48 |
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assertEquals(n, q.size()); |
49 |
+ |
assertEquals((Integer) 0, q.peekFirst()); |
50 |
+ |
assertEquals((Integer) (n - 1), q.peekLast()); |
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return q; |
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} |
53 |
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|
64 |
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*/ |
65 |
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public void testConstructor3() { |
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try { |
67 |
< |
ConcurrentLinkedDeque q = new ConcurrentLinkedDeque((Collection)null); |
67 |
> |
new ConcurrentLinkedDeque((Collection)null); |
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shouldThrow(); |
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} catch (NullPointerException success) {} |
70 |
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} |
74 |
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*/ |
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public void testConstructor4() { |
76 |
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try { |
77 |
< |
Integer[] ints = new Integer[SIZE]; |
62 |
< |
ConcurrentLinkedDeque q = new ConcurrentLinkedDeque(Arrays.asList(ints)); |
77 |
> |
new ConcurrentLinkedDeque(Arrays.asList(new Integer[SIZE])); |
78 |
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shouldThrow(); |
79 |
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} catch (NullPointerException success) {} |
80 |
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} |
83 |
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* Initializing from Collection with some null elements throws NPE |
84 |
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*/ |
85 |
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public void testConstructor5() { |
86 |
+ |
Integer[] ints = new Integer[SIZE]; |
87 |
+ |
for (int i = 0; i < SIZE - 1; ++i) |
88 |
+ |
ints[i] = new Integer(i); |
89 |
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try { |
90 |
< |
Integer[] ints = new Integer[SIZE]; |
73 |
< |
for (int i = 0; i < SIZE-1; ++i) |
74 |
< |
ints[i] = new Integer(i); |
75 |
< |
ConcurrentLinkedDeque q = new ConcurrentLinkedDeque(Arrays.asList(ints)); |
90 |
> |
new ConcurrentLinkedDeque(Arrays.asList(ints)); |
91 |
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shouldThrow(); |
92 |
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} catch (NullPointerException success) {} |
93 |
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} |
124 |
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public void testSize() { |
125 |
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ConcurrentLinkedDeque q = populatedDeque(SIZE); |
126 |
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for (int i = 0; i < SIZE; ++i) { |
127 |
< |
assertEquals(SIZE-i, q.size()); |
127 |
> |
assertEquals(SIZE - i, q.size()); |
128 |
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q.remove(); |
129 |
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} |
130 |
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for (int i = 0; i < SIZE; ++i) { |
137 |
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* push(null) throws NPE |
138 |
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*/ |
139 |
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public void testPushNull() { |
140 |
+ |
ConcurrentLinkedDeque q = new ConcurrentLinkedDeque(); |
141 |
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try { |
126 |
– |
ConcurrentLinkedDeque q = new ConcurrentLinkedDeque(); |
142 |
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q.push(null); |
143 |
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shouldThrow(); |
144 |
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} catch (NullPointerException success) {} |
172 |
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* offer(null) throws NPE |
173 |
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*/ |
174 |
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public void testOfferNull() { |
175 |
+ |
ConcurrentLinkedDeque q = new ConcurrentLinkedDeque(); |
176 |
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try { |
161 |
– |
ConcurrentLinkedDeque q = new ConcurrentLinkedDeque(); |
177 |
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q.offer(null); |
178 |
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shouldThrow(); |
179 |
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} catch (NullPointerException success) {} |
183 |
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* offerFirst(null) throws NPE |
184 |
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*/ |
185 |
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public void testOfferFirstNull() { |
186 |
+ |
ConcurrentLinkedDeque q = new ConcurrentLinkedDeque(); |
187 |
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try { |
172 |
– |
ConcurrentLinkedDeque q = new ConcurrentLinkedDeque(); |
188 |
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q.offerFirst(null); |
189 |
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shouldThrow(); |
190 |
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} catch (NullPointerException success) {} |
194 |
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* offerLast(null) throws NPE |
195 |
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*/ |
196 |
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public void testOfferLastNull() { |
197 |
+ |
ConcurrentLinkedDeque q = new ConcurrentLinkedDeque(); |
198 |
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try { |
183 |
– |
ConcurrentLinkedDeque q = new ConcurrentLinkedDeque(); |
199 |
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q.offerLast(null); |
200 |
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shouldThrow(); |
201 |
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} catch (NullPointerException success) {} |
238 |
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* add(null) throws NPE |
239 |
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*/ |
240 |
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public void testAddNull() { |
241 |
+ |
ConcurrentLinkedDeque q = new ConcurrentLinkedDeque(); |
242 |
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try { |
227 |
– |
ConcurrentLinkedDeque q = new ConcurrentLinkedDeque(); |
243 |
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q.add(null); |
244 |
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shouldThrow(); |
245 |
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} catch (NullPointerException success) {} |
249 |
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* addFirst(null) throws NPE |
250 |
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*/ |
251 |
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public void testAddFirstNull() { |
252 |
+ |
ConcurrentLinkedDeque q = new ConcurrentLinkedDeque(); |
253 |
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try { |
238 |
– |
ConcurrentLinkedDeque q = new ConcurrentLinkedDeque(); |
254 |
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q.addFirst(null); |
255 |
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shouldThrow(); |
256 |
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} catch (NullPointerException success) {} |
260 |
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* addLast(null) throws NPE |
261 |
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*/ |
262 |
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public void testAddLastNull() { |
263 |
+ |
ConcurrentLinkedDeque q = new ConcurrentLinkedDeque(); |
264 |
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try { |
249 |
– |
ConcurrentLinkedDeque q = new ConcurrentLinkedDeque(); |
265 |
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q.addLast(null); |
266 |
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shouldThrow(); |
267 |
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} catch (NullPointerException success) {} |
304 |
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* addAll(null) throws NPE |
305 |
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*/ |
306 |
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public void testAddAll1() { |
307 |
+ |
ConcurrentLinkedDeque q = new ConcurrentLinkedDeque(); |
308 |
|
try { |
293 |
– |
ConcurrentLinkedDeque q = new ConcurrentLinkedDeque(); |
309 |
|
q.addAll(null); |
310 |
|
shouldThrow(); |
311 |
|
} catch (NullPointerException success) {} |
312 |
|
} |
313 |
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|
314 |
|
/** |
315 |
< |
* addAll(this) throws IAE |
315 |
> |
* addAll(this) throws IllegalArgumentException |
316 |
|
*/ |
317 |
|
public void testAddAllSelf() { |
318 |
+ |
ConcurrentLinkedDeque q = populatedDeque(SIZE); |
319 |
|
try { |
304 |
– |
ConcurrentLinkedDeque q = populatedDeque(SIZE); |
320 |
|
q.addAll(q); |
321 |
|
shouldThrow(); |
322 |
|
} catch (IllegalArgumentException success) {} |
326 |
|
* addAll of a collection with null elements throws NPE |
327 |
|
*/ |
328 |
|
public void testAddAll2() { |
329 |
+ |
ConcurrentLinkedDeque q = new ConcurrentLinkedDeque(); |
330 |
|
try { |
331 |
< |
ConcurrentLinkedDeque q = new ConcurrentLinkedDeque(); |
316 |
< |
Integer[] ints = new Integer[SIZE]; |
317 |
< |
q.addAll(Arrays.asList(ints)); |
331 |
> |
q.addAll(Arrays.asList(new Integer[SIZE])); |
332 |
|
shouldThrow(); |
333 |
|
} catch (NullPointerException success) {} |
334 |
|
} |
338 |
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* possibly adding some elements |
339 |
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*/ |
340 |
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public void testAddAll3() { |
341 |
+ |
ConcurrentLinkedDeque q = new ConcurrentLinkedDeque(); |
342 |
+ |
Integer[] ints = new Integer[SIZE]; |
343 |
+ |
for (int i = 0; i < SIZE - 1; ++i) |
344 |
+ |
ints[i] = new Integer(i); |
345 |
|
try { |
328 |
– |
ConcurrentLinkedDeque q = new ConcurrentLinkedDeque(); |
329 |
– |
Integer[] ints = new Integer[SIZE]; |
330 |
– |
for (int i = 0; i < SIZE-1; ++i) |
331 |
– |
ints[i] = new Integer(i); |
346 |
|
q.addAll(Arrays.asList(ints)); |
347 |
|
shouldThrow(); |
348 |
|
} catch (NullPointerException success) {} |
379 |
|
*/ |
380 |
|
public void testPollLast() { |
381 |
|
ConcurrentLinkedDeque q = populatedDeque(SIZE); |
382 |
< |
for (int i = SIZE-1; i >= 0; --i) { |
382 |
> |
for (int i = SIZE - 1; i >= 0; --i) { |
383 |
|
assertEquals(i, q.pollLast()); |
384 |
|
} |
385 |
|
assertNull(q.pollLast()); |
444 |
|
*/ |
445 |
|
public void testRemoveElement() { |
446 |
|
ConcurrentLinkedDeque q = populatedDeque(SIZE); |
447 |
< |
for (int i = 1; i < SIZE; i+=2) { |
448 |
< |
assertTrue(q.remove(new Integer(i))); |
449 |
< |
} |
450 |
< |
for (int i = 0; i < SIZE; i+=2) { |
451 |
< |
assertTrue(q.remove(new Integer(i))); |
452 |
< |
assertFalse(q.remove(new Integer(i+1))); |
447 |
> |
for (int i = 1; i < SIZE; i += 2) { |
448 |
> |
assertTrue(q.contains(i)); |
449 |
> |
assertTrue(q.remove(i)); |
450 |
> |
assertFalse(q.contains(i)); |
451 |
> |
assertTrue(q.contains(i - 1)); |
452 |
> |
} |
453 |
> |
for (int i = 0; i < SIZE; i += 2) { |
454 |
> |
assertTrue(q.contains(i)); |
455 |
> |
assertTrue(q.remove(i)); |
456 |
> |
assertFalse(q.contains(i)); |
457 |
> |
assertFalse(q.remove(i + 1)); |
458 |
> |
assertFalse(q.contains(i + 1)); |
459 |
|
} |
460 |
|
assertTrue(q.isEmpty()); |
461 |
|
} |
479 |
|
*/ |
480 |
|
public void testPeekLast() { |
481 |
|
ConcurrentLinkedDeque q = populatedDeque(SIZE); |
482 |
< |
for (int i = SIZE-1; i >= 0; --i) { |
482 |
> |
for (int i = SIZE - 1; i >= 0; --i) { |
483 |
|
assertEquals(i, q.peekLast()); |
484 |
|
assertEquals(i, q.pollLast()); |
485 |
|
assertTrue(q.peekLast() == null || |
508 |
|
*/ |
509 |
|
public void testLastElement() { |
510 |
|
ConcurrentLinkedDeque q = populatedDeque(SIZE); |
511 |
< |
for (int i = SIZE-1; i >= 0; --i) { |
511 |
> |
for (int i = SIZE - 1; i >= 0; --i) { |
512 |
|
assertEquals(i, q.getLast()); |
513 |
|
assertEquals(i, q.pollLast()); |
514 |
|
} |
554 |
|
*/ |
555 |
|
public void testRemoveFirstOccurrence() { |
556 |
|
ConcurrentLinkedDeque q = populatedDeque(SIZE); |
557 |
< |
for (int i = 1; i < SIZE; i+=2) { |
557 |
> |
for (int i = 1; i < SIZE; i += 2) { |
558 |
|
assertTrue(q.removeFirstOccurrence(new Integer(i))); |
559 |
|
} |
560 |
< |
for (int i = 0; i < SIZE; i+=2) { |
560 |
> |
for (int i = 0; i < SIZE; i += 2) { |
561 |
|
assertTrue(q.removeFirstOccurrence(new Integer(i))); |
562 |
< |
assertFalse(q.removeFirstOccurrence(new Integer(i+1))); |
562 |
> |
assertFalse(q.removeFirstOccurrence(new Integer(i + 1))); |
563 |
|
} |
564 |
|
assertTrue(q.isEmpty()); |
565 |
|
} |
569 |
|
*/ |
570 |
|
public void testRemoveLastOccurrence() { |
571 |
|
ConcurrentLinkedDeque q = populatedDeque(SIZE); |
572 |
< |
for (int i = 1; i < SIZE; i+=2) { |
572 |
> |
for (int i = 1; i < SIZE; i += 2) { |
573 |
|
assertTrue(q.removeLastOccurrence(new Integer(i))); |
574 |
|
} |
575 |
< |
for (int i = 0; i < SIZE; i+=2) { |
575 |
> |
for (int i = 0; i < SIZE; i += 2) { |
576 |
|
assertTrue(q.removeLastOccurrence(new Integer(i))); |
577 |
< |
assertFalse(q.removeLastOccurrence(new Integer(i+1))); |
577 |
> |
assertFalse(q.removeLastOccurrence(new Integer(i + 1))); |
578 |
|
} |
579 |
|
assertTrue(q.isEmpty()); |
580 |
|
} |
633 |
|
assertTrue(changed); |
634 |
|
|
635 |
|
assertTrue(q.containsAll(p)); |
636 |
< |
assertEquals(SIZE-i, q.size()); |
636 |
> |
assertEquals(SIZE - i, q.size()); |
637 |
|
p.remove(); |
638 |
|
} |
639 |
|
} |
646 |
|
ConcurrentLinkedDeque q = populatedDeque(SIZE); |
647 |
|
ConcurrentLinkedDeque p = populatedDeque(i); |
648 |
|
assertTrue(q.removeAll(p)); |
649 |
< |
assertEquals(SIZE-i, q.size()); |
649 |
> |
assertEquals(SIZE - i, q.size()); |
650 |
|
for (int j = 0; j < i; ++j) { |
651 |
< |
Integer I = (Integer)(p.remove()); |
652 |
< |
assertFalse(q.contains(I)); |
651 |
> |
Integer x = (Integer)(p.remove()); |
652 |
> |
assertFalse(q.contains(x)); |
653 |
|
} |
654 |
|
} |
655 |
|
} |
668 |
|
* toArray(a) contains all elements in FIFO order |
669 |
|
*/ |
670 |
|
public void testToArray2() { |
671 |
< |
ConcurrentLinkedDeque q = populatedDeque(SIZE); |
671 |
> |
ConcurrentLinkedDeque<Integer> q = populatedDeque(SIZE); |
672 |
|
Integer[] ints = new Integer[SIZE]; |
673 |
< |
assertSame(ints, q.toArray(ints)); |
673 |
> |
Integer[] array = q.toArray(ints); |
674 |
> |
assertSame(ints, array); |
675 |
|
for (int i = 0; i < ints.length; i++) |
676 |
|
assertSame(ints[i], q.poll()); |
677 |
|
} |
703 |
|
*/ |
704 |
|
public void testIterator() { |
705 |
|
ConcurrentLinkedDeque q = populatedDeque(SIZE); |
685 |
– |
int i = 0; |
706 |
|
Iterator it = q.iterator(); |
707 |
< |
while (it.hasNext()) { |
707 |
> |
int i; |
708 |
> |
for (i = 0; it.hasNext(); i++) |
709 |
|
assertTrue(q.contains(it.next())); |
689 |
– |
++i; |
690 |
– |
} |
710 |
|
assertEquals(i, SIZE); |
711 |
+ |
assertIteratorExhausted(it); |
712 |
+ |
} |
713 |
+ |
|
714 |
+ |
/** |
715 |
+ |
* iterator of empty collection has no elements |
716 |
+ |
*/ |
717 |
+ |
public void testEmptyIterator() { |
718 |
+ |
Deque c = new ConcurrentLinkedDeque(); |
719 |
+ |
assertIteratorExhausted(c.iterator()); |
720 |
+ |
assertIteratorExhausted(c.descendingIterator()); |
721 |
|
} |
722 |
|
|
723 |
|
/** |
762 |
|
final Random rng = new Random(); |
763 |
|
for (int iters = 0; iters < 100; ++iters) { |
764 |
|
int max = rng.nextInt(5) + 2; |
765 |
< |
int split = rng.nextInt(max-1) + 1; |
765 |
> |
int split = rng.nextInt(max - 1) + 1; |
766 |
|
for (int j = 1; j <= max; ++j) |
767 |
|
q.add(new Integer(j)); |
768 |
|
Iterator it = q.iterator(); |
769 |
|
for (int j = 1; j <= split; ++j) |
770 |
|
assertEquals(it.next(), new Integer(j)); |
771 |
|
it.remove(); |
772 |
< |
assertEquals(it.next(), new Integer(split+1)); |
772 |
> |
assertEquals(it.next(), new Integer(split + 1)); |
773 |
|
for (int j = 1; j <= split; ++j) |
774 |
|
q.remove(new Integer(j)); |
775 |
|
it = q.iterator(); |
776 |
< |
for (int j = split+1; j <= max; ++j) { |
776 |
> |
for (int j = split + 1; j <= max; ++j) { |
777 |
|
assertEquals(it.next(), new Integer(j)); |
778 |
|
it.remove(); |
779 |
|
} |
830 |
|
final Random rng = new Random(); |
831 |
|
for (int iters = 0; iters < 100; ++iters) { |
832 |
|
int max = rng.nextInt(5) + 2; |
833 |
< |
int split = rng.nextInt(max-1) + 1; |
833 |
> |
int split = rng.nextInt(max - 1) + 1; |
834 |
|
for (int j = max; j >= 1; --j) |
835 |
|
q.add(new Integer(j)); |
836 |
|
Iterator it = q.descendingIterator(); |
837 |
|
for (int j = 1; j <= split; ++j) |
838 |
|
assertEquals(it.next(), new Integer(j)); |
839 |
|
it.remove(); |
840 |
< |
assertEquals(it.next(), new Integer(split+1)); |
840 |
> |
assertEquals(it.next(), new Integer(split + 1)); |
841 |
|
for (int j = 1; j <= split; ++j) |
842 |
|
q.remove(new Integer(j)); |
843 |
|
it = q.descendingIterator(); |
844 |
< |
for (int j = split+1; j <= max; ++j) { |
844 |
> |
for (int j = split + 1; j <= max; ++j) { |
845 |
|
assertEquals(it.next(), new Integer(j)); |
846 |
|
it.remove(); |
847 |
|
} |
857 |
|
ConcurrentLinkedDeque q = populatedDeque(SIZE); |
858 |
|
String s = q.toString(); |
859 |
|
for (int i = 0; i < SIZE; ++i) { |
860 |
< |
assertTrue(s.indexOf(String.valueOf(i)) >= 0); |
860 |
> |
assertTrue(s.contains(String.valueOf(i))); |
861 |
|
} |
862 |
|
} |
863 |
|
|
864 |
|
/** |
865 |
< |
* A deserialized serialized deque has same elements in same order |
865 |
> |
* A deserialized/reserialized deque has same elements in same order |
866 |
|
*/ |
867 |
|
public void testSerialization() throws Exception { |
868 |
< |
ConcurrentLinkedDeque q = populatedDeque(SIZE); |
869 |
< |
ByteArrayOutputStream bout = new ByteArrayOutputStream(10000); |
870 |
< |
ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout)); |
871 |
< |
out.writeObject(q); |
872 |
< |
out.close(); |
873 |
< |
|
874 |
< |
ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray()); |
875 |
< |
ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin)); |
876 |
< |
ConcurrentLinkedDeque r = (ConcurrentLinkedDeque)in.readObject(); |
877 |
< |
assertEquals(q.size(), r.size()); |
878 |
< |
while (!q.isEmpty()) |
879 |
< |
assertEquals(q.remove(), r.remove()); |
868 |
> |
Queue x = populatedDeque(SIZE); |
869 |
> |
Queue y = serialClone(x); |
870 |
> |
|
871 |
> |
assertNotSame(x, y); |
872 |
> |
assertEquals(x.size(), y.size()); |
873 |
> |
assertEquals(x.toString(), y.toString()); |
874 |
> |
assertTrue(Arrays.equals(x.toArray(), y.toArray())); |
875 |
> |
while (!x.isEmpty()) { |
876 |
> |
assertFalse(y.isEmpty()); |
877 |
> |
assertEquals(x.remove(), y.remove()); |
878 |
> |
} |
879 |
> |
assertTrue(y.isEmpty()); |
880 |
|
} |
881 |
|
|
882 |
+ |
/** |
883 |
+ |
* contains(null) always return false. |
884 |
+ |
* remove(null) always throws NullPointerException. |
885 |
+ |
*/ |
886 |
+ |
public void testNeverContainsNull() { |
887 |
+ |
Deque<?>[] qs = { |
888 |
+ |
new ConcurrentLinkedDeque<Object>(), |
889 |
+ |
populatedDeque(2), |
890 |
+ |
}; |
891 |
+ |
|
892 |
+ |
for (Deque<?> q : qs) { |
893 |
+ |
assertFalse(q.contains(null)); |
894 |
+ |
try { |
895 |
+ |
assertFalse(q.remove(null)); |
896 |
+ |
shouldThrow(); |
897 |
+ |
} catch (NullPointerException success) {} |
898 |
+ |
try { |
899 |
+ |
assertFalse(q.removeFirstOccurrence(null)); |
900 |
+ |
shouldThrow(); |
901 |
+ |
} catch (NullPointerException success) {} |
902 |
+ |
try { |
903 |
+ |
assertFalse(q.removeLastOccurrence(null)); |
904 |
+ |
shouldThrow(); |
905 |
+ |
} catch (NullPointerException success) {} |
906 |
+ |
} |
907 |
+ |
} |
908 |
|
} |