Calin Juravle | 8f0d92b | 2013-08-01 17:26:00 +0100 | [diff] [blame] | 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 | */ |
| 6 | |
| 7 | package jsr166; |
| 8 | |
Calin Juravle | 8f0d92b | 2013-08-01 17:26:00 +0100 | [diff] [blame] | 9 | import java.util.ArrayDeque; |
Narayan Kamath | 8e9a0e9 | 2015-04-28 11:40:00 +0100 | [diff] [blame] | 10 | import java.util.Arrays; |
Calin Juravle | 8f0d92b | 2013-08-01 17:26:00 +0100 | [diff] [blame] | 11 | import java.util.Collection; |
| 12 | import java.util.Deque; |
| 13 | import java.util.Iterator; |
| 14 | import java.util.NoSuchElementException; |
| 15 | import java.util.Queue; |
| 16 | import java.util.Random; |
| 17 | |
Narayan Kamath | 8e9a0e9 | 2015-04-28 11:40:00 +0100 | [diff] [blame] | 18 | import junit.framework.Test; |
| 19 | import junit.framework.TestSuite; |
| 20 | |
Calin Juravle | 8f0d92b | 2013-08-01 17:26:00 +0100 | [diff] [blame] | 21 | public class ArrayDequeTest extends JSR166TestCase { |
Narayan Kamath | 8e9a0e9 | 2015-04-28 11:40:00 +0100 | [diff] [blame] | 22 | // android-note: Removed because the CTS runner does a bad job of |
| 23 | // retrying tests that have suite() declarations. |
| 24 | // |
| 25 | // public static void main(String[] args) { |
| 26 | // main(suite(), args); |
| 27 | // } |
| 28 | // public static Test suite() { |
| 29 | // return new TestSuite(...); |
| 30 | // } |
Calin Juravle | 8f0d92b | 2013-08-01 17:26:00 +0100 | [diff] [blame] | 31 | |
| 32 | /** |
| 33 | * Returns a new deque of given size containing consecutive |
| 34 | * Integers 0 ... n. |
| 35 | */ |
| 36 | private ArrayDeque<Integer> populatedDeque(int n) { |
| 37 | ArrayDeque<Integer> q = new ArrayDeque<Integer>(); |
| 38 | assertTrue(q.isEmpty()); |
| 39 | for (int i = 0; i < n; ++i) |
| 40 | assertTrue(q.offerLast(new Integer(i))); |
| 41 | assertFalse(q.isEmpty()); |
| 42 | assertEquals(n, q.size()); |
| 43 | return q; |
| 44 | } |
| 45 | |
| 46 | /** |
| 47 | * new deque is empty |
| 48 | */ |
| 49 | public void testConstructor1() { |
| 50 | assertEquals(0, new ArrayDeque().size()); |
| 51 | } |
| 52 | |
| 53 | /** |
| 54 | * Initializing from null Collection throws NPE |
| 55 | */ |
| 56 | public void testConstructor3() { |
| 57 | try { |
Narayan Kamath | 8e9a0e9 | 2015-04-28 11:40:00 +0100 | [diff] [blame] | 58 | new ArrayDeque((Collection)null); |
Calin Juravle | 8f0d92b | 2013-08-01 17:26:00 +0100 | [diff] [blame] | 59 | shouldThrow(); |
| 60 | } catch (NullPointerException success) {} |
| 61 | } |
| 62 | |
| 63 | /** |
| 64 | * Initializing from Collection of null elements throws NPE |
| 65 | */ |
| 66 | public void testConstructor4() { |
| 67 | try { |
| 68 | Integer[] ints = new Integer[SIZE]; |
Narayan Kamath | 8e9a0e9 | 2015-04-28 11:40:00 +0100 | [diff] [blame] | 69 | new ArrayDeque(Arrays.asList(ints)); |
Calin Juravle | 8f0d92b | 2013-08-01 17:26:00 +0100 | [diff] [blame] | 70 | shouldThrow(); |
| 71 | } catch (NullPointerException success) {} |
| 72 | } |
| 73 | |
| 74 | /** |
| 75 | * Initializing from Collection with some null elements throws NPE |
| 76 | */ |
| 77 | public void testConstructor5() { |
| 78 | try { |
| 79 | Integer[] ints = new Integer[SIZE]; |
| 80 | for (int i = 0; i < SIZE-1; ++i) |
| 81 | ints[i] = new Integer(i); |
Narayan Kamath | 8e9a0e9 | 2015-04-28 11:40:00 +0100 | [diff] [blame] | 82 | new ArrayDeque(Arrays.asList(ints)); |
Calin Juravle | 8f0d92b | 2013-08-01 17:26:00 +0100 | [diff] [blame] | 83 | shouldThrow(); |
| 84 | } catch (NullPointerException success) {} |
| 85 | } |
| 86 | |
| 87 | /** |
| 88 | * Deque contains all elements of collection used to initialize |
| 89 | */ |
| 90 | public void testConstructor6() { |
| 91 | Integer[] ints = new Integer[SIZE]; |
| 92 | for (int i = 0; i < SIZE; ++i) |
| 93 | ints[i] = new Integer(i); |
| 94 | ArrayDeque q = new ArrayDeque(Arrays.asList(ints)); |
| 95 | for (int i = 0; i < SIZE; ++i) |
| 96 | assertEquals(ints[i], q.pollFirst()); |
| 97 | } |
| 98 | |
| 99 | /** |
| 100 | * isEmpty is true before add, false after |
| 101 | */ |
| 102 | public void testEmpty() { |
| 103 | ArrayDeque q = new ArrayDeque(); |
| 104 | assertTrue(q.isEmpty()); |
| 105 | q.add(new Integer(1)); |
| 106 | assertFalse(q.isEmpty()); |
| 107 | q.add(new Integer(2)); |
| 108 | q.removeFirst(); |
| 109 | q.removeFirst(); |
| 110 | assertTrue(q.isEmpty()); |
| 111 | } |
| 112 | |
| 113 | /** |
| 114 | * size changes when elements added and removed |
| 115 | */ |
| 116 | public void testSize() { |
| 117 | ArrayDeque q = populatedDeque(SIZE); |
| 118 | for (int i = 0; i < SIZE; ++i) { |
| 119 | assertEquals(SIZE-i, q.size()); |
| 120 | q.removeFirst(); |
| 121 | } |
| 122 | for (int i = 0; i < SIZE; ++i) { |
| 123 | assertEquals(i, q.size()); |
| 124 | q.add(new Integer(i)); |
| 125 | } |
| 126 | } |
| 127 | |
| 128 | /** |
| 129 | * push(null) throws NPE |
| 130 | */ |
| 131 | public void testPushNull() { |
| 132 | try { |
| 133 | ArrayDeque q = new ArrayDeque(1); |
| 134 | q.push(null); |
| 135 | shouldThrow(); |
| 136 | } catch (NullPointerException success) {} |
| 137 | } |
| 138 | |
| 139 | /** |
| 140 | * peekFirst() returns element inserted with push |
| 141 | */ |
| 142 | public void testPush() { |
| 143 | ArrayDeque q = populatedDeque(3); |
| 144 | q.pollLast(); |
| 145 | q.push(four); |
| 146 | assertSame(four, q.peekFirst()); |
| 147 | } |
| 148 | |
| 149 | /** |
| 150 | * pop() removes next element, or throws NSEE if empty |
| 151 | */ |
| 152 | public void testPop() { |
| 153 | ArrayDeque q = populatedDeque(SIZE); |
| 154 | for (int i = 0; i < SIZE; ++i) { |
| 155 | assertEquals(i, q.pop()); |
| 156 | } |
| 157 | try { |
| 158 | q.pop(); |
| 159 | shouldThrow(); |
| 160 | } catch (NoSuchElementException success) {} |
| 161 | } |
| 162 | |
| 163 | /** |
| 164 | * offer(null) throws NPE |
| 165 | */ |
| 166 | public void testOfferNull() { |
| 167 | try { |
| 168 | ArrayDeque q = new ArrayDeque(); |
| 169 | q.offer(null); |
| 170 | shouldThrow(); |
| 171 | } catch (NullPointerException success) {} |
| 172 | } |
| 173 | |
| 174 | /** |
| 175 | * offerFirst(null) throws NPE |
| 176 | */ |
| 177 | public void testOfferFirstNull() { |
| 178 | try { |
| 179 | ArrayDeque q = new ArrayDeque(); |
| 180 | q.offerFirst(null); |
| 181 | shouldThrow(); |
| 182 | } catch (NullPointerException success) {} |
| 183 | } |
| 184 | |
| 185 | /** |
| 186 | * offerLast(null) throws NPE |
| 187 | */ |
| 188 | public void testOfferLastNull() { |
| 189 | try { |
| 190 | ArrayDeque q = new ArrayDeque(); |
| 191 | q.offerLast(null); |
| 192 | shouldThrow(); |
| 193 | } catch (NullPointerException success) {} |
| 194 | } |
| 195 | |
| 196 | /** |
| 197 | * offer(x) succeeds |
| 198 | */ |
| 199 | public void testOffer() { |
| 200 | ArrayDeque q = new ArrayDeque(); |
| 201 | assertTrue(q.offer(zero)); |
| 202 | assertTrue(q.offer(one)); |
| 203 | assertSame(zero, q.peekFirst()); |
| 204 | assertSame(one, q.peekLast()); |
| 205 | } |
| 206 | |
| 207 | /** |
| 208 | * offerFirst(x) succeeds |
| 209 | */ |
| 210 | public void testOfferFirst() { |
| 211 | ArrayDeque q = new ArrayDeque(); |
| 212 | assertTrue(q.offerFirst(zero)); |
| 213 | assertTrue(q.offerFirst(one)); |
| 214 | assertSame(one, q.peekFirst()); |
| 215 | assertSame(zero, q.peekLast()); |
| 216 | } |
| 217 | |
| 218 | /** |
| 219 | * offerLast(x) succeeds |
| 220 | */ |
| 221 | public void testOfferLast() { |
| 222 | ArrayDeque q = new ArrayDeque(); |
| 223 | assertTrue(q.offerLast(zero)); |
| 224 | assertTrue(q.offerLast(one)); |
| 225 | assertSame(zero, q.peekFirst()); |
| 226 | assertSame(one, q.peekLast()); |
| 227 | } |
| 228 | |
| 229 | /** |
| 230 | * add(null) throws NPE |
| 231 | */ |
| 232 | public void testAddNull() { |
| 233 | try { |
| 234 | ArrayDeque q = new ArrayDeque(); |
| 235 | q.add(null); |
| 236 | shouldThrow(); |
| 237 | } catch (NullPointerException success) {} |
| 238 | } |
| 239 | |
| 240 | /** |
| 241 | * addFirst(null) throws NPE |
| 242 | */ |
| 243 | public void testAddFirstNull() { |
| 244 | try { |
| 245 | ArrayDeque q = new ArrayDeque(); |
| 246 | q.addFirst(null); |
| 247 | shouldThrow(); |
| 248 | } catch (NullPointerException success) {} |
| 249 | } |
| 250 | |
| 251 | /** |
| 252 | * addLast(null) throws NPE |
| 253 | */ |
| 254 | public void testAddLastNull() { |
| 255 | try { |
| 256 | ArrayDeque q = new ArrayDeque(); |
| 257 | q.addLast(null); |
| 258 | shouldThrow(); |
| 259 | } catch (NullPointerException success) {} |
| 260 | } |
| 261 | |
| 262 | /** |
| 263 | * add(x) succeeds |
| 264 | */ |
| 265 | public void testAdd() { |
| 266 | ArrayDeque q = new ArrayDeque(); |
| 267 | assertTrue(q.add(zero)); |
| 268 | assertTrue(q.add(one)); |
| 269 | assertSame(zero, q.peekFirst()); |
| 270 | assertSame(one, q.peekLast()); |
| 271 | } |
| 272 | |
| 273 | /** |
| 274 | * addFirst(x) succeeds |
| 275 | */ |
| 276 | public void testAddFirst() { |
| 277 | ArrayDeque q = new ArrayDeque(); |
| 278 | q.addFirst(zero); |
| 279 | q.addFirst(one); |
| 280 | assertSame(one, q.peekFirst()); |
| 281 | assertSame(zero, q.peekLast()); |
| 282 | } |
| 283 | |
| 284 | /** |
| 285 | * addLast(x) succeeds |
| 286 | */ |
| 287 | public void testAddLast() { |
| 288 | ArrayDeque q = new ArrayDeque(); |
| 289 | q.addLast(zero); |
| 290 | q.addLast(one); |
| 291 | assertSame(zero, q.peekFirst()); |
| 292 | assertSame(one, q.peekLast()); |
| 293 | } |
| 294 | |
| 295 | /** |
| 296 | * addAll(null) throws NPE |
| 297 | */ |
| 298 | public void testAddAll1() { |
| 299 | try { |
| 300 | ArrayDeque q = new ArrayDeque(); |
| 301 | q.addAll(null); |
| 302 | shouldThrow(); |
| 303 | } catch (NullPointerException success) {} |
| 304 | } |
| 305 | |
| 306 | /** |
| 307 | * addAll of a collection with null elements throws NPE |
| 308 | */ |
| 309 | public void testAddAll2() { |
| 310 | try { |
| 311 | ArrayDeque q = new ArrayDeque(); |
| 312 | Integer[] ints = new Integer[SIZE]; |
| 313 | q.addAll(Arrays.asList(ints)); |
| 314 | shouldThrow(); |
| 315 | } catch (NullPointerException success) {} |
| 316 | } |
| 317 | |
| 318 | /** |
| 319 | * addAll of a collection with any null elements throws NPE after |
| 320 | * possibly adding some elements |
| 321 | */ |
| 322 | public void testAddAll3() { |
| 323 | try { |
| 324 | ArrayDeque q = new ArrayDeque(); |
| 325 | Integer[] ints = new Integer[SIZE]; |
| 326 | for (int i = 0; i < SIZE-1; ++i) |
| 327 | ints[i] = new Integer(i); |
| 328 | q.addAll(Arrays.asList(ints)); |
| 329 | shouldThrow(); |
| 330 | } catch (NullPointerException success) {} |
| 331 | } |
| 332 | |
| 333 | /** |
| 334 | * Deque contains all elements, in traversal order, of successful addAll |
| 335 | */ |
| 336 | public void testAddAll5() { |
| 337 | Integer[] empty = new Integer[0]; |
| 338 | Integer[] ints = new Integer[SIZE]; |
| 339 | for (int i = 0; i < SIZE; ++i) |
| 340 | ints[i] = new Integer(i); |
| 341 | ArrayDeque q = new ArrayDeque(); |
| 342 | assertFalse(q.addAll(Arrays.asList(empty))); |
| 343 | assertTrue(q.addAll(Arrays.asList(ints))); |
| 344 | for (int i = 0; i < SIZE; ++i) |
| 345 | assertEquals(ints[i], q.pollFirst()); |
| 346 | } |
| 347 | |
| 348 | /** |
| 349 | * pollFirst() succeeds unless empty |
| 350 | */ |
| 351 | public void testPollFirst() { |
| 352 | ArrayDeque q = populatedDeque(SIZE); |
| 353 | for (int i = 0; i < SIZE; ++i) { |
| 354 | assertEquals(i, q.pollFirst()); |
| 355 | } |
| 356 | assertNull(q.pollFirst()); |
| 357 | } |
| 358 | |
| 359 | /** |
| 360 | * pollLast() succeeds unless empty |
| 361 | */ |
| 362 | public void testPollLast() { |
| 363 | ArrayDeque q = populatedDeque(SIZE); |
| 364 | for (int i = SIZE-1; i >= 0; --i) { |
| 365 | assertEquals(i, q.pollLast()); |
| 366 | } |
| 367 | assertNull(q.pollLast()); |
| 368 | } |
| 369 | |
| 370 | /** |
| 371 | * poll() succeeds unless empty |
| 372 | */ |
| 373 | public void testPoll() { |
| 374 | ArrayDeque q = populatedDeque(SIZE); |
| 375 | for (int i = 0; i < SIZE; ++i) { |
| 376 | assertEquals(i, q.poll()); |
| 377 | } |
| 378 | assertNull(q.poll()); |
| 379 | } |
| 380 | |
| 381 | /** |
| 382 | * remove() removes next element, or throws NSEE if empty |
| 383 | */ |
| 384 | public void testRemove() { |
| 385 | ArrayDeque q = populatedDeque(SIZE); |
| 386 | for (int i = 0; i < SIZE; ++i) { |
| 387 | assertEquals(i, q.remove()); |
| 388 | } |
| 389 | try { |
| 390 | q.remove(); |
| 391 | shouldThrow(); |
| 392 | } catch (NoSuchElementException success) {} |
| 393 | } |
| 394 | |
| 395 | /** |
| 396 | * remove(x) removes x and returns true if present |
| 397 | */ |
| 398 | public void testRemoveElement() { |
| 399 | ArrayDeque q = populatedDeque(SIZE); |
Narayan Kamath | 8e9a0e9 | 2015-04-28 11:40:00 +0100 | [diff] [blame] | 400 | for (int i = 1; i < SIZE; i += 2) { |
Calin Juravle | 8f0d92b | 2013-08-01 17:26:00 +0100 | [diff] [blame] | 401 | assertTrue(q.contains(i)); |
| 402 | assertTrue(q.remove(i)); |
| 403 | assertFalse(q.contains(i)); |
| 404 | assertTrue(q.contains(i-1)); |
| 405 | } |
Narayan Kamath | 8e9a0e9 | 2015-04-28 11:40:00 +0100 | [diff] [blame] | 406 | for (int i = 0; i < SIZE; i += 2) { |
Calin Juravle | 8f0d92b | 2013-08-01 17:26:00 +0100 | [diff] [blame] | 407 | assertTrue(q.contains(i)); |
| 408 | assertTrue(q.remove(i)); |
| 409 | assertFalse(q.contains(i)); |
| 410 | assertFalse(q.remove(i+1)); |
| 411 | assertFalse(q.contains(i+1)); |
| 412 | } |
| 413 | assertTrue(q.isEmpty()); |
| 414 | } |
| 415 | |
| 416 | /** |
| 417 | * peekFirst() returns next element, or null if empty |
| 418 | */ |
| 419 | public void testPeekFirst() { |
| 420 | ArrayDeque q = populatedDeque(SIZE); |
| 421 | for (int i = 0; i < SIZE; ++i) { |
| 422 | assertEquals(i, q.peekFirst()); |
| 423 | assertEquals(i, q.pollFirst()); |
| 424 | assertTrue(q.peekFirst() == null || |
| 425 | !q.peekFirst().equals(i)); |
| 426 | } |
| 427 | assertNull(q.peekFirst()); |
| 428 | } |
| 429 | |
| 430 | /** |
| 431 | * peek() returns next element, or null if empty |
| 432 | */ |
| 433 | public void testPeek() { |
| 434 | ArrayDeque q = populatedDeque(SIZE); |
| 435 | for (int i = 0; i < SIZE; ++i) { |
| 436 | assertEquals(i, q.peek()); |
| 437 | assertEquals(i, q.poll()); |
| 438 | assertTrue(q.peek() == null || |
| 439 | !q.peek().equals(i)); |
| 440 | } |
| 441 | assertNull(q.peek()); |
| 442 | } |
| 443 | |
| 444 | /** |
| 445 | * peekLast() returns next element, or null if empty |
| 446 | */ |
| 447 | public void testPeekLast() { |
| 448 | ArrayDeque q = populatedDeque(SIZE); |
| 449 | for (int i = SIZE-1; i >= 0; --i) { |
| 450 | assertEquals(i, q.peekLast()); |
| 451 | assertEquals(i, q.pollLast()); |
| 452 | assertTrue(q.peekLast() == null || |
| 453 | !q.peekLast().equals(i)); |
| 454 | } |
| 455 | assertNull(q.peekLast()); |
| 456 | } |
| 457 | |
| 458 | /** |
| 459 | * element() returns first element, or throws NSEE if empty |
| 460 | */ |
| 461 | public void testElement() { |
| 462 | ArrayDeque q = populatedDeque(SIZE); |
| 463 | for (int i = 0; i < SIZE; ++i) { |
| 464 | assertEquals(i, q.element()); |
| 465 | assertEquals(i, q.poll()); |
| 466 | } |
| 467 | try { |
| 468 | q.element(); |
| 469 | shouldThrow(); |
| 470 | } catch (NoSuchElementException success) {} |
| 471 | } |
| 472 | |
| 473 | /** |
| 474 | * getFirst() returns first element, or throws NSEE if empty |
| 475 | */ |
| 476 | public void testFirstElement() { |
| 477 | ArrayDeque q = populatedDeque(SIZE); |
| 478 | for (int i = 0; i < SIZE; ++i) { |
| 479 | assertEquals(i, q.getFirst()); |
| 480 | assertEquals(i, q.pollFirst()); |
| 481 | } |
| 482 | try { |
| 483 | q.getFirst(); |
| 484 | shouldThrow(); |
| 485 | } catch (NoSuchElementException success) {} |
| 486 | } |
| 487 | |
| 488 | /** |
| 489 | * getLast() returns last element, or throws NSEE if empty |
| 490 | */ |
| 491 | public void testLastElement() { |
| 492 | ArrayDeque q = populatedDeque(SIZE); |
| 493 | for (int i = SIZE-1; i >= 0; --i) { |
| 494 | assertEquals(i, q.getLast()); |
| 495 | assertEquals(i, q.pollLast()); |
| 496 | } |
| 497 | try { |
| 498 | q.getLast(); |
| 499 | shouldThrow(); |
| 500 | } catch (NoSuchElementException success) {} |
| 501 | assertNull(q.peekLast()); |
| 502 | } |
| 503 | |
| 504 | /** |
| 505 | * removeFirst() removes first element, or throws NSEE if empty |
| 506 | */ |
| 507 | public void testRemoveFirst() { |
| 508 | ArrayDeque q = populatedDeque(SIZE); |
| 509 | for (int i = 0; i < SIZE; ++i) { |
| 510 | assertEquals(i, q.removeFirst()); |
| 511 | } |
| 512 | try { |
| 513 | q.removeFirst(); |
| 514 | shouldThrow(); |
| 515 | } catch (NoSuchElementException success) {} |
| 516 | assertNull(q.peekFirst()); |
| 517 | } |
| 518 | |
| 519 | /** |
| 520 | * removeLast() removes last element, or throws NSEE if empty |
| 521 | */ |
| 522 | public void testRemoveLast() { |
| 523 | ArrayDeque q = populatedDeque(SIZE); |
| 524 | for (int i = SIZE - 1; i >= 0; --i) { |
| 525 | assertEquals(i, q.removeLast()); |
| 526 | } |
| 527 | try { |
| 528 | q.removeLast(); |
| 529 | shouldThrow(); |
| 530 | } catch (NoSuchElementException success) {} |
| 531 | assertNull(q.peekLast()); |
| 532 | } |
| 533 | |
| 534 | /** |
| 535 | * removeFirstOccurrence(x) removes x and returns true if present |
| 536 | */ |
| 537 | public void testRemoveFirstOccurrence() { |
| 538 | ArrayDeque q = populatedDeque(SIZE); |
Narayan Kamath | 8e9a0e9 | 2015-04-28 11:40:00 +0100 | [diff] [blame] | 539 | for (int i = 1; i < SIZE; i += 2) { |
Calin Juravle | 8f0d92b | 2013-08-01 17:26:00 +0100 | [diff] [blame] | 540 | assertTrue(q.removeFirstOccurrence(new Integer(i))); |
| 541 | } |
Narayan Kamath | 8e9a0e9 | 2015-04-28 11:40:00 +0100 | [diff] [blame] | 542 | for (int i = 0; i < SIZE; i += 2) { |
Calin Juravle | 8f0d92b | 2013-08-01 17:26:00 +0100 | [diff] [blame] | 543 | assertTrue(q.removeFirstOccurrence(new Integer(i))); |
| 544 | assertFalse(q.removeFirstOccurrence(new Integer(i+1))); |
| 545 | } |
| 546 | assertTrue(q.isEmpty()); |
| 547 | } |
| 548 | |
| 549 | /** |
| 550 | * removeLastOccurrence(x) removes x and returns true if present |
| 551 | */ |
| 552 | public void testRemoveLastOccurrence() { |
| 553 | ArrayDeque q = populatedDeque(SIZE); |
Narayan Kamath | 8e9a0e9 | 2015-04-28 11:40:00 +0100 | [diff] [blame] | 554 | for (int i = 1; i < SIZE; i += 2) { |
Calin Juravle | 8f0d92b | 2013-08-01 17:26:00 +0100 | [diff] [blame] | 555 | assertTrue(q.removeLastOccurrence(new Integer(i))); |
| 556 | } |
Narayan Kamath | 8e9a0e9 | 2015-04-28 11:40:00 +0100 | [diff] [blame] | 557 | for (int i = 0; i < SIZE; i += 2) { |
Calin Juravle | 8f0d92b | 2013-08-01 17:26:00 +0100 | [diff] [blame] | 558 | assertTrue(q.removeLastOccurrence(new Integer(i))); |
| 559 | assertFalse(q.removeLastOccurrence(new Integer(i+1))); |
| 560 | } |
| 561 | assertTrue(q.isEmpty()); |
| 562 | } |
| 563 | |
| 564 | /** |
| 565 | * contains(x) reports true when elements added but not yet removed |
| 566 | */ |
| 567 | public void testContains() { |
| 568 | ArrayDeque q = populatedDeque(SIZE); |
| 569 | for (int i = 0; i < SIZE; ++i) { |
| 570 | assertTrue(q.contains(new Integer(i))); |
| 571 | assertEquals(i, q.pollFirst()); |
| 572 | assertFalse(q.contains(new Integer(i))); |
| 573 | } |
| 574 | } |
| 575 | |
| 576 | /** |
| 577 | * clear removes all elements |
| 578 | */ |
| 579 | public void testClear() { |
| 580 | ArrayDeque q = populatedDeque(SIZE); |
| 581 | q.clear(); |
| 582 | assertTrue(q.isEmpty()); |
| 583 | assertEquals(0, q.size()); |
| 584 | assertTrue(q.add(new Integer(1))); |
| 585 | assertFalse(q.isEmpty()); |
| 586 | q.clear(); |
| 587 | assertTrue(q.isEmpty()); |
| 588 | } |
| 589 | |
| 590 | /** |
| 591 | * containsAll(c) is true when c contains a subset of elements |
| 592 | */ |
| 593 | public void testContainsAll() { |
| 594 | ArrayDeque q = populatedDeque(SIZE); |
| 595 | ArrayDeque p = new ArrayDeque(); |
| 596 | for (int i = 0; i < SIZE; ++i) { |
| 597 | assertTrue(q.containsAll(p)); |
| 598 | assertFalse(p.containsAll(q)); |
| 599 | assertTrue(p.add(new Integer(i))); |
| 600 | } |
| 601 | assertTrue(p.containsAll(q)); |
| 602 | } |
| 603 | |
| 604 | /** |
| 605 | * retainAll(c) retains only those elements of c and reports true if changed |
| 606 | */ |
| 607 | public void testRetainAll() { |
| 608 | ArrayDeque q = populatedDeque(SIZE); |
| 609 | ArrayDeque p = populatedDeque(SIZE); |
| 610 | for (int i = 0; i < SIZE; ++i) { |
| 611 | boolean changed = q.retainAll(p); |
| 612 | assertEquals(changed, (i > 0)); |
| 613 | assertTrue(q.containsAll(p)); |
| 614 | assertEquals(SIZE-i, q.size()); |
| 615 | p.removeFirst(); |
| 616 | } |
| 617 | } |
| 618 | |
| 619 | /** |
| 620 | * removeAll(c) removes only those elements of c and reports true if changed |
| 621 | */ |
| 622 | public void testRemoveAll() { |
| 623 | for (int i = 1; i < SIZE; ++i) { |
| 624 | ArrayDeque q = populatedDeque(SIZE); |
| 625 | ArrayDeque p = populatedDeque(i); |
| 626 | assertTrue(q.removeAll(p)); |
| 627 | assertEquals(SIZE-i, q.size()); |
| 628 | for (int j = 0; j < i; ++j) { |
| 629 | assertFalse(q.contains(p.removeFirst())); |
| 630 | } |
| 631 | } |
| 632 | } |
| 633 | |
| 634 | void checkToArray(ArrayDeque q) { |
| 635 | int size = q.size(); |
| 636 | Object[] o = q.toArray(); |
| 637 | assertEquals(size, o.length); |
| 638 | Iterator it = q.iterator(); |
| 639 | for (int i = 0; i < size; i++) { |
| 640 | Integer x = (Integer) it.next(); |
| 641 | assertEquals((Integer)o[0] + i, (int) x); |
| 642 | assertSame(o[i], x); |
| 643 | } |
| 644 | } |
| 645 | |
| 646 | /** |
| 647 | * toArray() contains all elements in FIFO order |
| 648 | */ |
| 649 | public void testToArray() { |
| 650 | ArrayDeque q = new ArrayDeque(); |
| 651 | for (int i = 0; i < SIZE; i++) { |
| 652 | checkToArray(q); |
| 653 | q.addLast(i); |
| 654 | } |
| 655 | // Provoke wraparound |
| 656 | for (int i = 0; i < SIZE; i++) { |
| 657 | checkToArray(q); |
| 658 | assertEquals(i, q.poll()); |
| 659 | q.addLast(SIZE+i); |
| 660 | } |
| 661 | for (int i = 0; i < SIZE; i++) { |
| 662 | checkToArray(q); |
| 663 | assertEquals(SIZE+i, q.poll()); |
| 664 | } |
| 665 | } |
| 666 | |
| 667 | void checkToArray2(ArrayDeque q) { |
| 668 | int size = q.size(); |
| 669 | Integer[] a1 = size == 0 ? null : new Integer[size-1]; |
| 670 | Integer[] a2 = new Integer[size]; |
| 671 | Integer[] a3 = new Integer[size+2]; |
| 672 | if (size > 0) Arrays.fill(a1, 42); |
| 673 | Arrays.fill(a2, 42); |
| 674 | Arrays.fill(a3, 42); |
| 675 | Integer[] b1 = size == 0 ? null : (Integer[]) q.toArray(a1); |
| 676 | Integer[] b2 = (Integer[]) q.toArray(a2); |
| 677 | Integer[] b3 = (Integer[]) q.toArray(a3); |
| 678 | assertSame(a2, b2); |
| 679 | assertSame(a3, b3); |
| 680 | Iterator it = q.iterator(); |
| 681 | for (int i = 0; i < size; i++) { |
| 682 | Integer x = (Integer) it.next(); |
| 683 | assertSame(b1[i], x); |
| 684 | assertEquals(b1[0] + i, (int) x); |
| 685 | assertSame(b2[i], x); |
| 686 | assertSame(b3[i], x); |
| 687 | } |
| 688 | assertNull(a3[size]); |
| 689 | assertEquals(42, (int) a3[size+1]); |
| 690 | if (size > 0) { |
| 691 | assertNotSame(a1, b1); |
| 692 | assertEquals(size, b1.length); |
| 693 | for (int i = 0; i < a1.length; i++) { |
| 694 | assertEquals(42, (int) a1[i]); |
| 695 | } |
| 696 | } |
| 697 | } |
| 698 | |
| 699 | /** |
| 700 | * toArray(a) contains all elements in FIFO order |
| 701 | */ |
| 702 | public void testToArray2() { |
| 703 | ArrayDeque q = new ArrayDeque(); |
| 704 | for (int i = 0; i < SIZE; i++) { |
| 705 | checkToArray2(q); |
| 706 | q.addLast(i); |
| 707 | } |
| 708 | // Provoke wraparound |
| 709 | for (int i = 0; i < SIZE; i++) { |
| 710 | checkToArray2(q); |
| 711 | assertEquals(i, q.poll()); |
| 712 | q.addLast(SIZE+i); |
| 713 | } |
| 714 | for (int i = 0; i < SIZE; i++) { |
| 715 | checkToArray2(q); |
| 716 | assertEquals(SIZE+i, q.poll()); |
| 717 | } |
| 718 | } |
| 719 | |
| 720 | /** |
| 721 | * toArray(null) throws NullPointerException |
| 722 | */ |
| 723 | public void testToArray_NullArg() { |
| 724 | ArrayDeque l = new ArrayDeque(); |
| 725 | l.add(new Object()); |
| 726 | try { |
| 727 | l.toArray(null); |
| 728 | shouldThrow(); |
| 729 | } catch (NullPointerException success) {} |
| 730 | } |
| 731 | |
| 732 | /** |
| 733 | * toArray(incompatible array type) throws ArrayStoreException |
| 734 | */ |
| 735 | public void testToArray1_BadArg() { |
| 736 | ArrayDeque l = new ArrayDeque(); |
| 737 | l.add(new Integer(5)); |
| 738 | try { |
| 739 | l.toArray(new String[10]); |
| 740 | shouldThrow(); |
| 741 | } catch (ArrayStoreException success) {} |
| 742 | } |
| 743 | |
| 744 | /** |
| 745 | * Iterator iterates through all elements |
| 746 | */ |
| 747 | public void testIterator() { |
| 748 | ArrayDeque q = populatedDeque(SIZE); |
Calin Juravle | 8f0d92b | 2013-08-01 17:26:00 +0100 | [diff] [blame] | 749 | Iterator it = q.iterator(); |
Narayan Kamath | 8e9a0e9 | 2015-04-28 11:40:00 +0100 | [diff] [blame] | 750 | int i; |
| 751 | for (i = 0; it.hasNext(); i++) |
Calin Juravle | 8f0d92b | 2013-08-01 17:26:00 +0100 | [diff] [blame] | 752 | assertTrue(q.contains(it.next())); |
Calin Juravle | 8f0d92b | 2013-08-01 17:26:00 +0100 | [diff] [blame] | 753 | assertEquals(i, SIZE); |
Narayan Kamath | 8e9a0e9 | 2015-04-28 11:40:00 +0100 | [diff] [blame] | 754 | assertIteratorExhausted(it); |
| 755 | } |
| 756 | |
| 757 | /** |
| 758 | * iterator of empty collection has no elements |
| 759 | */ |
| 760 | public void testEmptyIterator() { |
| 761 | Deque c = new ArrayDeque(); |
| 762 | assertIteratorExhausted(c.iterator()); |
| 763 | assertIteratorExhausted(c.descendingIterator()); |
Calin Juravle | 8f0d92b | 2013-08-01 17:26:00 +0100 | [diff] [blame] | 764 | } |
| 765 | |
| 766 | /** |
| 767 | * Iterator ordering is FIFO |
| 768 | */ |
| 769 | public void testIteratorOrdering() { |
| 770 | final ArrayDeque q = new ArrayDeque(); |
| 771 | q.add(one); |
| 772 | q.add(two); |
| 773 | q.add(three); |
| 774 | int k = 0; |
| 775 | for (Iterator it = q.iterator(); it.hasNext();) { |
| 776 | assertEquals(++k, it.next()); |
| 777 | } |
| 778 | |
| 779 | assertEquals(3, k); |
| 780 | } |
| 781 | |
| 782 | /** |
| 783 | * iterator.remove() removes current element |
| 784 | */ |
| 785 | public void testIteratorRemove() { |
| 786 | final ArrayDeque q = new ArrayDeque(); |
| 787 | final Random rng = new Random(); |
| 788 | for (int iters = 0; iters < 100; ++iters) { |
| 789 | int max = rng.nextInt(5) + 2; |
| 790 | int split = rng.nextInt(max-1) + 1; |
| 791 | for (int j = 1; j <= max; ++j) |
| 792 | q.add(new Integer(j)); |
| 793 | Iterator it = q.iterator(); |
| 794 | for (int j = 1; j <= split; ++j) |
| 795 | assertEquals(it.next(), new Integer(j)); |
| 796 | it.remove(); |
| 797 | assertEquals(it.next(), new Integer(split+1)); |
| 798 | for (int j = 1; j <= split; ++j) |
| 799 | q.remove(new Integer(j)); |
| 800 | it = q.iterator(); |
| 801 | for (int j = split+1; j <= max; ++j) { |
| 802 | assertEquals(it.next(), new Integer(j)); |
| 803 | it.remove(); |
| 804 | } |
| 805 | assertFalse(it.hasNext()); |
| 806 | assertTrue(q.isEmpty()); |
| 807 | } |
| 808 | } |
| 809 | |
| 810 | /** |
| 811 | * Descending iterator iterates through all elements |
| 812 | */ |
| 813 | public void testDescendingIterator() { |
| 814 | ArrayDeque q = populatedDeque(SIZE); |
| 815 | int i = 0; |
| 816 | Iterator it = q.descendingIterator(); |
| 817 | while (it.hasNext()) { |
| 818 | assertTrue(q.contains(it.next())); |
| 819 | ++i; |
| 820 | } |
| 821 | assertEquals(i, SIZE); |
| 822 | assertFalse(it.hasNext()); |
| 823 | try { |
| 824 | it.next(); |
| 825 | shouldThrow(); |
| 826 | } catch (NoSuchElementException success) {} |
| 827 | } |
| 828 | |
| 829 | /** |
| 830 | * Descending iterator ordering is reverse FIFO |
| 831 | */ |
| 832 | public void testDescendingIteratorOrdering() { |
| 833 | final ArrayDeque q = new ArrayDeque(); |
| 834 | for (int iters = 0; iters < 100; ++iters) { |
| 835 | q.add(new Integer(3)); |
| 836 | q.add(new Integer(2)); |
| 837 | q.add(new Integer(1)); |
| 838 | int k = 0; |
| 839 | for (Iterator it = q.descendingIterator(); it.hasNext();) { |
| 840 | assertEquals(++k, it.next()); |
| 841 | } |
| 842 | |
| 843 | assertEquals(3, k); |
| 844 | q.remove(); |
| 845 | q.remove(); |
| 846 | q.remove(); |
| 847 | } |
| 848 | } |
| 849 | |
| 850 | /** |
| 851 | * descendingIterator.remove() removes current element |
| 852 | */ |
| 853 | public void testDescendingIteratorRemove() { |
| 854 | final ArrayDeque q = new ArrayDeque(); |
| 855 | final Random rng = new Random(); |
| 856 | for (int iters = 0; iters < 100; ++iters) { |
| 857 | int max = rng.nextInt(5) + 2; |
| 858 | int split = rng.nextInt(max-1) + 1; |
| 859 | for (int j = max; j >= 1; --j) |
| 860 | q.add(new Integer(j)); |
| 861 | Iterator it = q.descendingIterator(); |
| 862 | for (int j = 1; j <= split; ++j) |
| 863 | assertEquals(it.next(), new Integer(j)); |
| 864 | it.remove(); |
| 865 | assertEquals(it.next(), new Integer(split+1)); |
| 866 | for (int j = 1; j <= split; ++j) |
| 867 | q.remove(new Integer(j)); |
| 868 | it = q.descendingIterator(); |
| 869 | for (int j = split+1; j <= max; ++j) { |
| 870 | assertEquals(it.next(), new Integer(j)); |
| 871 | it.remove(); |
| 872 | } |
| 873 | assertFalse(it.hasNext()); |
| 874 | assertTrue(q.isEmpty()); |
| 875 | } |
| 876 | } |
| 877 | |
| 878 | /** |
| 879 | * toString() contains toStrings of elements |
| 880 | */ |
| 881 | public void testToString() { |
| 882 | ArrayDeque q = populatedDeque(SIZE); |
| 883 | String s = q.toString(); |
| 884 | for (int i = 0; i < SIZE; ++i) { |
| 885 | assertTrue(s.contains(String.valueOf(i))); |
| 886 | } |
| 887 | } |
| 888 | |
| 889 | /** |
| 890 | * A deserialized serialized deque has same elements in same order |
| 891 | */ |
| 892 | public void testSerialization() throws Exception { |
| 893 | Queue x = populatedDeque(SIZE); |
| 894 | Queue y = serialClone(x); |
| 895 | |
| 896 | assertNotSame(y, x); |
| 897 | assertEquals(x.size(), y.size()); |
| 898 | assertEquals(x.toString(), y.toString()); |
| 899 | assertTrue(Arrays.equals(x.toArray(), y.toArray())); |
| 900 | while (!x.isEmpty()) { |
| 901 | assertFalse(y.isEmpty()); |
| 902 | assertEquals(x.remove(), y.remove()); |
| 903 | } |
| 904 | assertTrue(y.isEmpty()); |
| 905 | } |
| 906 | |
Narayan Kamath | 8e9a0e9 | 2015-04-28 11:40:00 +0100 | [diff] [blame] | 907 | /** |
| 908 | * remove(null), contains(null) always return false |
| 909 | */ |
| 910 | public void testNeverContainsNull() { |
| 911 | Deque<?>[] qs = { |
| 912 | new ArrayDeque<Object>(), |
| 913 | populatedDeque(2), |
| 914 | }; |
| 915 | |
| 916 | for (Deque<?> q : qs) { |
| 917 | assertFalse(q.contains(null)); |
| 918 | assertFalse(q.remove(null)); |
| 919 | assertFalse(q.removeFirstOccurrence(null)); |
| 920 | assertFalse(q.removeLastOccurrence(null)); |
| 921 | } |
| 922 | } |
| 923 | |
Calin Juravle | 8f0d92b | 2013-08-01 17:26:00 +0100 | [diff] [blame] | 924 | } |