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/* |
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* Written by Doug Lea with assistance from members of JCP JSR-166 |
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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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*/ |
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import junit.framework.*; |
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import java.util.*; |
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import java.util.concurrent.*; |
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import java.util.Arrays; |
9 |
> |
import java.util.ArrayDeque; |
10 |
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import java.util.Collection; |
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import java.util.Deque; |
12 |
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import java.util.Iterator; |
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import java.util.NoSuchElementException; |
14 |
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import java.util.Queue; |
15 |
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import java.util.Random; |
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|
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public class ArrayDequeTest extends JSR166TestCase { |
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public static void main(String[] args) { |
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junit.textui.TestRunner.run (suite()); |
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junit.textui.TestRunner.run(suite()); |
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} |
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public static Test suite() { |
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} |
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|
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/** |
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< |
* Create a queue of given size containing consecutive |
27 |
> |
* Create a deque of given size containing consecutive |
28 |
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* Integers 0 ... n. |
29 |
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*/ |
30 |
< |
private ArrayDeque populatedDeque(int n) { |
31 |
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ArrayDeque q = new ArrayDeque(); |
30 |
> |
private ArrayDeque<Integer> populatedDeque(int n) { |
31 |
> |
ArrayDeque<Integer> q = new ArrayDeque<Integer>(); |
32 |
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assertTrue(q.isEmpty()); |
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for (int i = 0; i < n; ++i) |
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assertTrue(q.offerLast(new Integer(i))); |
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} |
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|
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/** |
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< |
* new queue is empty |
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* new deque is empty |
42 |
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*/ |
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public void testConstructor1() { |
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assertEquals(0, new ArrayDeque().size()); |
55 |
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} |
56 |
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|
57 |
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/** |
58 |
< |
* Queue contains all elements of collection used to initialize |
58 |
> |
* Initializing from Collection of null elements throws NPE |
59 |
> |
*/ |
60 |
> |
public void testConstructor4() { |
61 |
> |
try { |
62 |
> |
Integer[] ints = new Integer[SIZE]; |
63 |
> |
ArrayDeque q = new ArrayDeque(Arrays.asList(ints)); |
64 |
> |
shouldThrow(); |
65 |
> |
} catch (NullPointerException success) {} |
66 |
> |
} |
67 |
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|
68 |
+ |
/** |
69 |
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* Initializing from Collection with some null elements throws NPE |
70 |
+ |
*/ |
71 |
+ |
public void testConstructor5() { |
72 |
+ |
try { |
73 |
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Integer[] ints = new Integer[SIZE]; |
74 |
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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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ArrayDeque q = new ArrayDeque(Arrays.asList(ints)); |
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shouldThrow(); |
78 |
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} catch (NullPointerException success) {} |
79 |
+ |
} |
80 |
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|
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/** |
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* Deque contains all elements of collection used to initialize |
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*/ |
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public void testConstructor6() { |
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Integer[] ints = new Integer[SIZE]; |
131 |
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} |
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|
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/** |
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* peekFirst returns element inserted with push |
134 |
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* peekFirst() returns element inserted with push |
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*/ |
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public void testPush() { |
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ArrayDeque q = populatedDeque(3); |
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} |
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|
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/** |
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* pop removes next element, or throws NSEE if empty |
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* pop() removes next element, or throws NSEE if empty |
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*/ |
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public void testPop() { |
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ArrayDeque q = populatedDeque(SIZE); |
157 |
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/** |
158 |
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* offer(null) throws NPE |
159 |
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*/ |
160 |
+ |
public void testOfferNull() { |
161 |
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try { |
162 |
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ArrayDeque q = new ArrayDeque(); |
163 |
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q.offer(null); |
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shouldThrow(); |
165 |
+ |
} catch (NullPointerException success) {} |
166 |
+ |
} |
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|
168 |
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/** |
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* offerFirst(null) throws NPE |
170 |
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*/ |
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public void testOfferFirstNull() { |
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try { |
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ArrayDeque q = new ArrayDeque(); |
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} |
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|
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/** |
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* OfferFirst succeeds |
180 |
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* offerLast(null) throws NPE |
181 |
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*/ |
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public void testOfferLastNull() { |
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try { |
184 |
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ArrayDeque q = new ArrayDeque(); |
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q.offerLast(null); |
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shouldThrow(); |
187 |
> |
} catch (NullPointerException success) {} |
188 |
> |
} |
189 |
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|
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/** |
191 |
> |
* offer(x) succeeds |
192 |
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*/ |
193 |
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public void testOffer() { |
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ArrayDeque q = new ArrayDeque(); |
195 |
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assertTrue(q.offer(zero)); |
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assertTrue(q.offer(one)); |
197 |
> |
assertSame(zero, q.peekFirst()); |
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assertSame(one, q.peekLast()); |
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} |
200 |
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|
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/** |
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* offerFirst(x) succeeds |
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*/ |
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public void testOfferFirst() { |
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ArrayDeque q = new ArrayDeque(); |
206 |
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assertTrue(q.offerFirst(new Integer(0))); |
207 |
< |
assertTrue(q.offerFirst(new Integer(1))); |
206 |
> |
assertTrue(q.offerFirst(zero)); |
207 |
> |
assertTrue(q.offerFirst(one)); |
208 |
> |
assertSame(one, q.peekFirst()); |
209 |
> |
assertSame(zero, q.peekLast()); |
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} |
211 |
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|
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/** |
213 |
< |
* OfferLast succeeds |
213 |
> |
* offerLast(x) succeeds |
214 |
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*/ |
215 |
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public void testOfferLast() { |
216 |
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ArrayDeque q = new ArrayDeque(); |
217 |
< |
assertTrue(q.offerLast(new Integer(0))); |
218 |
< |
assertTrue(q.offerLast(new Integer(1))); |
217 |
> |
assertTrue(q.offerLast(zero)); |
218 |
> |
assertTrue(q.offerLast(one)); |
219 |
> |
assertSame(zero, q.peekFirst()); |
220 |
> |
assertSame(one, q.peekLast()); |
221 |
> |
} |
222 |
> |
|
223 |
> |
/** |
224 |
> |
* add(null) throws NPE |
225 |
> |
*/ |
226 |
> |
public void testAddNull() { |
227 |
> |
try { |
228 |
> |
ArrayDeque q = new ArrayDeque(); |
229 |
> |
q.add(null); |
230 |
> |
shouldThrow(); |
231 |
> |
} catch (NullPointerException success) {} |
232 |
> |
} |
233 |
> |
|
234 |
> |
/** |
235 |
> |
* addFirst(null) throws NPE |
236 |
> |
*/ |
237 |
> |
public void testAddFirstNull() { |
238 |
> |
try { |
239 |
> |
ArrayDeque q = new ArrayDeque(); |
240 |
> |
q.addFirst(null); |
241 |
> |
shouldThrow(); |
242 |
> |
} catch (NullPointerException success) {} |
243 |
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} |
244 |
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|
245 |
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/** |
246 |
< |
* add succeeds |
246 |
> |
* addLast(null) throws NPE |
247 |
> |
*/ |
248 |
> |
public void testAddLastNull() { |
249 |
> |
try { |
250 |
> |
ArrayDeque q = new ArrayDeque(); |
251 |
> |
q.addLast(null); |
252 |
> |
shouldThrow(); |
253 |
> |
} catch (NullPointerException success) {} |
254 |
> |
} |
255 |
> |
|
256 |
> |
/** |
257 |
> |
* add(x) succeeds |
258 |
|
*/ |
259 |
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public void testAdd() { |
260 |
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ArrayDeque q = new ArrayDeque(); |
261 |
< |
for (int i = 0; i < SIZE; ++i) { |
262 |
< |
assertEquals(i, q.size()); |
263 |
< |
assertTrue(q.add(new Integer(i))); |
264 |
< |
} |
261 |
> |
assertTrue(q.add(zero)); |
262 |
> |
assertTrue(q.add(one)); |
263 |
> |
assertSame(zero, q.peekFirst()); |
264 |
> |
assertSame(one, q.peekLast()); |
265 |
> |
} |
266 |
> |
|
267 |
> |
/** |
268 |
> |
* addFirst(x) succeeds |
269 |
> |
*/ |
270 |
> |
public void testAddFirst() { |
271 |
> |
ArrayDeque q = new ArrayDeque(); |
272 |
> |
q.addFirst(zero); |
273 |
> |
q.addFirst(one); |
274 |
> |
assertSame(one, q.peekFirst()); |
275 |
> |
assertSame(zero, q.peekLast()); |
276 |
> |
} |
277 |
> |
|
278 |
> |
/** |
279 |
> |
* addLast(x) succeeds |
280 |
> |
*/ |
281 |
> |
public void testAddLast() { |
282 |
> |
ArrayDeque q = new ArrayDeque(); |
283 |
> |
q.addLast(zero); |
284 |
> |
q.addLast(one); |
285 |
> |
assertSame(zero, q.peekFirst()); |
286 |
> |
assertSame(one, q.peekLast()); |
287 |
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} |
288 |
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|
289 |
|
/** |
298 |
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} |
299 |
|
|
300 |
|
/** |
301 |
< |
* Queue contains all elements, in traversal order, of successful addAll |
301 |
> |
* addAll of a collection with null elements throws NPE |
302 |
> |
*/ |
303 |
> |
public void testAddAll2() { |
304 |
> |
try { |
305 |
> |
ArrayDeque q = new ArrayDeque(); |
306 |
> |
Integer[] ints = new Integer[SIZE]; |
307 |
> |
q.addAll(Arrays.asList(ints)); |
308 |
> |
shouldThrow(); |
309 |
> |
} catch (NullPointerException success) {} |
310 |
> |
} |
311 |
> |
|
312 |
> |
/** |
313 |
> |
* addAll of a collection with any null elements throws NPE after |
314 |
> |
* possibly adding some elements |
315 |
> |
*/ |
316 |
> |
public void testAddAll3() { |
317 |
> |
try { |
318 |
> |
ArrayDeque q = new ArrayDeque(); |
319 |
> |
Integer[] ints = new Integer[SIZE]; |
320 |
> |
for (int i = 0; i < SIZE-1; ++i) |
321 |
> |
ints[i] = new Integer(i); |
322 |
> |
q.addAll(Arrays.asList(ints)); |
323 |
> |
shouldThrow(); |
324 |
> |
} catch (NullPointerException success) {} |
325 |
> |
} |
326 |
> |
|
327 |
> |
/** |
328 |
> |
* Deque contains all elements, in traversal order, of successful addAll |
329 |
|
*/ |
330 |
|
public void testAddAll5() { |
331 |
|
Integer[] empty = new Integer[0]; |
340 |
|
} |
341 |
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|
342 |
|
/** |
343 |
< |
* pollFirst succeeds unless empty |
343 |
> |
* pollFirst() succeeds unless empty |
344 |
|
*/ |
345 |
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public void testPollFirst() { |
346 |
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ArrayDeque q = populatedDeque(SIZE); |
351 |
|
} |
352 |
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|
353 |
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/** |
354 |
< |
* pollLast succeeds unless empty |
354 |
> |
* pollLast() succeeds unless empty |
355 |
|
*/ |
356 |
|
public void testPollLast() { |
357 |
|
ArrayDeque q = populatedDeque(SIZE); |
362 |
|
} |
363 |
|
|
364 |
|
/** |
365 |
< |
* poll succeeds unless empty |
365 |
> |
* poll() succeeds unless empty |
366 |
|
*/ |
367 |
|
public void testPoll() { |
368 |
|
ArrayDeque q = populatedDeque(SIZE); |
373 |
|
} |
374 |
|
|
375 |
|
/** |
376 |
< |
* remove removes next element, or throws NSEE if empty |
376 |
> |
* remove() removes next element, or throws NSEE if empty |
377 |
|
*/ |
378 |
|
public void testRemove() { |
379 |
|
ArrayDeque q = populatedDeque(SIZE); |
387 |
|
} |
388 |
|
|
389 |
|
/** |
390 |
< |
* peekFirst returns next element, or null if empty |
390 |
> |
* remove(x) removes x and returns true if present |
391 |
> |
*/ |
392 |
> |
public void testRemoveElement() { |
393 |
> |
ArrayDeque q = populatedDeque(SIZE); |
394 |
> |
for (int i = 1; i < SIZE; i+=2) { |
395 |
> |
assertTrue(q.contains(i)); |
396 |
> |
assertTrue(q.remove(i)); |
397 |
> |
assertFalse(q.contains(i)); |
398 |
> |
assertTrue(q.contains(i-1)); |
399 |
> |
} |
400 |
> |
for (int i = 0; i < SIZE; i+=2) { |
401 |
> |
assertTrue(q.contains(i)); |
402 |
> |
assertTrue(q.remove(i)); |
403 |
> |
assertFalse(q.contains(i)); |
404 |
> |
assertFalse(q.remove(i+1)); |
405 |
> |
assertFalse(q.contains(i+1)); |
406 |
> |
} |
407 |
> |
assertTrue(q.isEmpty()); |
408 |
> |
} |
409 |
> |
|
410 |
> |
/** |
411 |
> |
* peekFirst() returns next element, or null if empty |
412 |
|
*/ |
413 |
|
public void testPeekFirst() { |
414 |
|
ArrayDeque q = populatedDeque(SIZE); |
422 |
|
} |
423 |
|
|
424 |
|
/** |
425 |
< |
* peek returns next element, or null if empty |
425 |
> |
* peek() returns next element, or null if empty |
426 |
|
*/ |
427 |
|
public void testPeek() { |
428 |
|
ArrayDeque q = populatedDeque(SIZE); |
436 |
|
} |
437 |
|
|
438 |
|
/** |
439 |
< |
* peekLast returns next element, or null if empty |
439 |
> |
* peekLast() returns next element, or null if empty |
440 |
|
*/ |
441 |
|
public void testPeekLast() { |
442 |
|
ArrayDeque q = populatedDeque(SIZE); |
450 |
|
} |
451 |
|
|
452 |
|
/** |
453 |
< |
* getFirst returns next getFirst, or throws NSEE if empty |
453 |
> |
* element() returns first element, or throws NSEE if empty |
454 |
> |
*/ |
455 |
> |
public void testElement() { |
456 |
> |
ArrayDeque q = populatedDeque(SIZE); |
457 |
> |
for (int i = 0; i < SIZE; ++i) { |
458 |
> |
assertEquals(i, q.element()); |
459 |
> |
assertEquals(i, q.poll()); |
460 |
> |
} |
461 |
> |
try { |
462 |
> |
q.element(); |
463 |
> |
shouldThrow(); |
464 |
> |
} catch (NoSuchElementException success) {} |
465 |
> |
} |
466 |
> |
|
467 |
> |
/** |
468 |
> |
* getFirst() returns first element, or throws NSEE if empty |
469 |
|
*/ |
470 |
|
public void testFirstElement() { |
471 |
|
ArrayDeque q = populatedDeque(SIZE); |
480 |
|
} |
481 |
|
|
482 |
|
/** |
483 |
< |
* getLast returns next element, or throws NSEE if empty |
483 |
> |
* getLast() returns last element, or throws NSEE if empty |
484 |
|
*/ |
485 |
|
public void testLastElement() { |
486 |
|
ArrayDeque q = populatedDeque(SIZE); |
495 |
|
assertNull(q.peekLast()); |
496 |
|
} |
497 |
|
|
314 |
– |
|
498 |
|
/** |
499 |
< |
* removeFirst removes next element, or throws NSEE if empty |
499 |
> |
* removeFirst() removes first element, or throws NSEE if empty |
500 |
|
*/ |
501 |
|
public void testRemoveFirst() { |
502 |
|
ArrayDeque q = populatedDeque(SIZE); |
507 |
|
q.removeFirst(); |
508 |
|
shouldThrow(); |
509 |
|
} catch (NoSuchElementException success) {} |
510 |
+ |
assertNull(q.peekFirst()); |
511 |
+ |
} |
512 |
+ |
|
513 |
+ |
/** |
514 |
+ |
* removeLast() removes last element, or throws NSEE if empty |
515 |
+ |
*/ |
516 |
+ |
public void testRemoveLast() { |
517 |
+ |
ArrayDeque q = populatedDeque(SIZE); |
518 |
+ |
for (int i = SIZE - 1; i >= 0; --i) { |
519 |
+ |
assertEquals(i, q.removeLast()); |
520 |
+ |
} |
521 |
+ |
try { |
522 |
+ |
q.removeLast(); |
523 |
+ |
shouldThrow(); |
524 |
+ |
} catch (NoSuchElementException success) {} |
525 |
+ |
assertNull(q.peekLast()); |
526 |
|
} |
527 |
|
|
528 |
|
/** |
626 |
|
} |
627 |
|
|
628 |
|
/** |
629 |
< |
* toArray contains all elements |
629 |
> |
* toArray() contains all elements in FIFO order |
630 |
|
*/ |
631 |
|
public void testToArray() { |
632 |
|
ArrayDeque q = populatedDeque(SIZE); |
633 |
|
Object[] o = q.toArray(); |
435 |
– |
Arrays.sort(o); |
634 |
|
for (int i = 0; i < o.length; i++) |
635 |
< |
assertEquals(o[i], q.pollFirst()); |
635 |
> |
assertSame(o[i], q.pollFirst()); |
636 |
|
} |
637 |
|
|
638 |
|
/** |
639 |
< |
* toArray(a) contains all elements |
639 |
> |
* toArray(a) contains all elements in FIFO order |
640 |
|
*/ |
641 |
|
public void testToArray2() { |
642 |
< |
ArrayDeque q = populatedDeque(SIZE); |
642 |
> |
ArrayDeque<Integer> q = populatedDeque(SIZE); |
643 |
|
Integer[] ints = new Integer[SIZE]; |
644 |
< |
ints = (Integer[])q.toArray(ints); |
645 |
< |
Arrays.sort(ints); |
644 |
> |
Integer[] array = q.toArray(ints); |
645 |
> |
assertSame(ints, array); |
646 |
|
for (int i = 0; i < ints.length; i++) |
647 |
< |
assertEquals(ints[i], q.pollFirst()); |
647 |
> |
assertSame(ints[i], q.remove()); |
648 |
|
} |
649 |
|
|
650 |
|
/** |
651 |
< |
* toArray(null) throws NPE |
651 |
> |
* toArray(null) throws NullPointerException |
652 |
|
*/ |
653 |
< |
public void testToArray_BadArg() { |
653 |
> |
public void testToArray_NullArg() { |
654 |
|
ArrayDeque l = new ArrayDeque(); |
655 |
|
l.add(new Object()); |
656 |
|
try { |
657 |
< |
Object o[] = l.toArray(null); |
657 |
> |
l.toArray(null); |
658 |
|
shouldThrow(); |
659 |
|
} catch (NullPointerException success) {} |
660 |
|
} |
661 |
|
|
662 |
|
/** |
663 |
< |
* toArray with incompatable aray type throws CCE |
663 |
> |
* toArray(incompatible array type) throws ArrayStoreException |
664 |
|
*/ |
665 |
|
public void testToArray1_BadArg() { |
666 |
|
ArrayDeque l = new ArrayDeque(); |
667 |
|
l.add(new Integer(5)); |
668 |
|
try { |
669 |
< |
Object o[] = l.toArray(new String[10]); |
669 |
> |
l.toArray(new String[10]); |
670 |
|
shouldThrow(); |
671 |
|
} catch (ArrayStoreException success) {} |
672 |
|
} |
673 |
|
|
674 |
|
/** |
675 |
< |
* iterator iterates through all elements |
675 |
> |
* Iterator iterates through all elements |
676 |
|
*/ |
677 |
|
public void testIterator() { |
678 |
|
ArrayDeque q = populatedDeque(SIZE); |
686 |
|
} |
687 |
|
|
688 |
|
/** |
689 |
< |
* iterator ordering is FIFO |
689 |
> |
* Iterator ordering is FIFO |
690 |
|
*/ |
691 |
|
public void testIteratorOrdering() { |
692 |
|
final ArrayDeque q = new ArrayDeque(); |
693 |
< |
q.add(new Integer(1)); |
694 |
< |
q.add(new Integer(2)); |
695 |
< |
q.add(new Integer(3)); |
693 |
> |
q.add(one); |
694 |
> |
q.add(two); |
695 |
> |
q.add(three); |
696 |
|
int k = 0; |
697 |
|
for (Iterator it = q.iterator(); it.hasNext();) { |
698 |
|
assertEquals(++k, it.next()); |
702 |
|
} |
703 |
|
|
704 |
|
/** |
705 |
< |
* iterator.remove removes current element |
705 |
> |
* iterator.remove() removes current element |
706 |
|
*/ |
707 |
< |
public void testIteratorRemove () { |
707 |
> |
public void testIteratorRemove() { |
708 |
|
final ArrayDeque q = new ArrayDeque(); |
709 |
|
final Random rng = new Random(); |
710 |
|
for (int iters = 0; iters < 100; ++iters) { |
730 |
|
} |
731 |
|
|
732 |
|
/** |
733 |
< |
* Descending iterator iterates through all elements |
733 |
> |
* Descending iterator iterates through all elements |
734 |
|
*/ |
735 |
|
public void testDescendingIterator() { |
736 |
|
ArrayDeque q = populatedDeque(SIZE); |
749 |
|
} |
750 |
|
|
751 |
|
/** |
752 |
< |
* Descending iterator ordering is reverse FIFO |
752 |
> |
* Descending iterator ordering is reverse FIFO |
753 |
|
*/ |
754 |
|
public void testDescendingIteratorOrdering() { |
755 |
|
final ArrayDeque q = new ArrayDeque(); |
770 |
|
} |
771 |
|
|
772 |
|
/** |
773 |
< |
* descendingIterator.remove removes current element |
773 |
> |
* descendingIterator.remove() removes current element |
774 |
|
*/ |
775 |
< |
public void testDescendingIteratorRemove () { |
775 |
> |
public void testDescendingIteratorRemove() { |
776 |
|
final ArrayDeque q = new ArrayDeque(); |
777 |
|
final Random rng = new Random(); |
778 |
|
for (int iters = 0; iters < 100; ++iters) { |
797 |
|
} |
798 |
|
} |
799 |
|
|
602 |
– |
|
800 |
|
/** |
801 |
< |
* toString contains toStrings of elements |
801 |
> |
* toString() contains toStrings of elements |
802 |
|
*/ |
803 |
|
public void testToString() { |
804 |
|
ArrayDeque q = populatedDeque(SIZE); |
805 |
|
String s = q.toString(); |
806 |
|
for (int i = 0; i < SIZE; ++i) { |
807 |
< |
assertTrue(s.indexOf(String.valueOf(i)) >= 0); |
807 |
> |
assertTrue(s.contains(String.valueOf(i))); |
808 |
|
} |
809 |
|
} |
810 |
|
|
811 |
|
/** |
812 |
< |
* peekFirst returns element inserted with addFirst |
812 |
> |
* A deserialized serialized deque has same elements in same order |
813 |
|
*/ |
814 |
< |
public void testAddFirst() { |
815 |
< |
ArrayDeque q = populatedDeque(3); |
816 |
< |
q.addFirst(four); |
620 |
< |
assertEquals(four,q.peekFirst()); |
621 |
< |
} |
814 |
> |
public void testSerialization() throws Exception { |
815 |
> |
Queue x = populatedDeque(SIZE); |
816 |
> |
Queue y = serialClone(x); |
817 |
|
|
818 |
< |
/** |
819 |
< |
* peekLast returns element inserted with addLast |
820 |
< |
*/ |
821 |
< |
public void testAddLast() { |
822 |
< |
ArrayDeque q = populatedDeque(3); |
823 |
< |
q.addLast(four); |
824 |
< |
assertEquals(four,q.peekLast()); |
818 |
> |
assertTrue(x != y); |
819 |
> |
assertEquals(x.size(), y.size()); |
820 |
> |
assertEquals(x.toString(), y.toString()); |
821 |
> |
assertTrue(Arrays.equals(x.toArray(), y.toArray())); |
822 |
> |
while (!x.isEmpty()) { |
823 |
> |
assertFalse(y.isEmpty()); |
824 |
> |
assertEquals(x.remove(), y.remove()); |
825 |
> |
} |
826 |
> |
assertTrue(y.isEmpty()); |
827 |
|
} |
828 |
|
|
829 |
|
} |