1 /* 2 * Copyright (c) 2006, 2018, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 /* 25 * @test 26 * @bug 6420753 6242436 6691185 27 * @summary Compare NavigableMap implementations for identical behavior 28 * @run main LockStep 29 * @run main/othervm -XX:+EliminateAutoBox -XX:AutoBoxCacheMax=20000 LockStep 30 * @run main/othervm -XX:+EliminateAutoBox -XX:AutoBoxCacheMax=20000 -Dthorough=true LockStep 31 * @author Martin Buchholz 32 * @key randomness 33 */ 34 35 import java.io.ByteArrayInputStream; 36 import java.io.ByteArrayOutputStream; 37 import java.io.IOException; 38 import java.io.InputStream; 39 import java.io.NotSerializableException; 40 import java.io.ObjectInputStream; 41 import java.io.ObjectOutputStream; 42 import java.io.Serializable; 43 import java.util.Arrays; 44 import java.util.Collection; 45 import java.util.Collections; 46 import java.util.Comparator; 47 import java.util.HashSet; 48 import java.util.Iterator; 49 import java.util.List; 50 import java.util.Map; 51 import java.util.NavigableMap; 52 import java.util.NavigableSet; 53 import java.util.NoSuchElementException; 54 import java.util.Random; 55 import java.util.Set; 56 import java.util.TreeMap; 57 import java.util.TreeSet; 58 import java.util.concurrent.ConcurrentSkipListMap; 59 import java.util.concurrent.ConcurrentSkipListSet; 60 61 import static java.util.Collections.reverseOrder; 62 import static java.util.Collections.singleton; 63 import static java.util.Collections.singletonMap; 64 65 @SuppressWarnings("unchecked") 66 public class LockStep { 67 static final int DEFAULT_SIZE = 5; 68 static int size; // Running time is O(size**2) 69 70 static int intArg(String[] args, int i, int defaultValue) { 71 return args.length > i ? Integer.parseInt(args[i]) : defaultValue; 72 } 73 74 // Pass -Dthorough=true for more exhaustive testing 75 static final boolean thorough = Boolean.getBoolean("thorough"); 76 77 static boolean maybe(int n) { return rnd.nextInt(n) == 0; } 78 79 static void realMain(String[] args) { 80 size = intArg(args, 0, DEFAULT_SIZE); 81 82 lockSteps(new TreeMap(), 83 new ConcurrentSkipListMap()); 84 lockSteps(new TreeMap(), 85 Collections.checkedNavigableMap(new TreeMap(), Integer.class, Integer.class)); 86 lockSteps(new TreeMap(), 87 Collections.synchronizedNavigableMap(new TreeMap())); 88 lockSteps(new TreeMap(reverseOrder()), 89 new ConcurrentSkipListMap(reverseOrder())); 90 91 lockSteps(new TreeSet(), 92 new ConcurrentSkipListSet()); 93 lockSteps(new TreeSet(), 94 Collections.checkedNavigableSet(new TreeSet(), Integer.class)); 95 lockSteps(new TreeSet(), 96 Collections.synchronizedNavigableSet(new TreeSet())); 97 lockSteps(new TreeSet(reverseOrder()), 98 new ConcurrentSkipListSet(reverseOrder())); 99 } 100 101 static void lockSteps(NavigableMap m1, NavigableMap m2) { 102 if (maybe(4)) m1 = serialClone(m1); 103 if (maybe(4)) m2 = serialClone(m2); 104 lockStep(m1, 105 m2); 106 lockStep(m1.descendingMap(), 107 m2.descendingMap()); 108 lockStep(fullSubMap(m1), 109 fullSubMap(m2)); 110 lockStep(fullSubMap(m1.descendingMap()), 111 fullSubMap(m2.descendingMap())); 112 lockStep(fullHeadMap(m1), 113 fullHeadMap(m2)); 114 lockStep(fullHeadMap(m1.descendingMap()), 115 fullHeadMap(m2.descendingMap())); 116 lockStep(fullTailMap(m1), 117 fullTailMap(m2)); 118 lockStep(fullTailMap(m1.descendingMap()), 119 fullTailMap(m2.descendingMap())); 120 } 121 122 static void lockSteps(NavigableSet s1, NavigableSet s2) { 123 if (maybe(4)) s1 = serialClone(s1); 124 if (maybe(4)) s2 = serialClone(s2); 125 lockStep(s1, 126 s2); 127 lockStep(s1.descendingSet(), 128 s2.descendingSet()); 129 lockStep(fullSubSet(s1), 130 fullSubSet(s2)); 131 lockStep(fullSubSet(s1.descendingSet()), 132 fullSubSet(s2.descendingSet())); 133 lockStep(fullHeadSet(s1), 134 fullHeadSet(s2)); 135 lockStep(fullHeadSet(s1.descendingSet()), 136 fullHeadSet(s2.descendingSet())); 137 lockStep(fullTailSet(s1), 138 fullTailSet(s2)); 139 lockStep(fullTailSet(s1.descendingSet()), 140 fullTailSet(s2.descendingSet())); 141 } 142 143 static boolean isAscending(NavigableMap m) { 144 Comparator cmp = m.comparator(); 145 return (cmp == null || cmp.compare(1, 2) < 0); 146 } 147 148 static NavigableMap fullSubMap(NavigableMap m) { 149 return isAscending(m) 150 ? m.subMap(Integer.MIN_VALUE, true, Integer.MAX_VALUE, true) 151 : m.subMap(Integer.MAX_VALUE, true, Integer.MIN_VALUE, true); 152 } 153 154 static NavigableMap fullHeadMap(NavigableMap m) { 155 return isAscending(m) 156 ? m.headMap(Integer.MAX_VALUE, true) 157 : m.headMap(Integer.MIN_VALUE, true); 158 } 159 160 static NavigableMap fullTailMap(NavigableMap m) { 161 return isAscending(m) 162 ? m.tailMap(Integer.MIN_VALUE, true) 163 : m.tailMap(Integer.MAX_VALUE, true); 164 } 165 166 static boolean isAscending(NavigableSet s) { 167 Comparator cmp = s.comparator(); 168 return (cmp == null || cmp.compare(1, 2) < 0); 169 } 170 171 static NavigableSet fullSubSet(NavigableSet s) { 172 return isAscending(s) 173 ? s.subSet(Integer.MIN_VALUE, true, Integer.MAX_VALUE, true) 174 : s.subSet(Integer.MAX_VALUE, true, Integer.MIN_VALUE, true); 175 } 176 177 static NavigableSet fullHeadSet(NavigableSet s) { 178 return isAscending(s) 179 ? s.headSet(Integer.MAX_VALUE, true) 180 : s.headSet(Integer.MIN_VALUE, true); 181 } 182 183 static NavigableSet fullTailSet(NavigableSet s) { 184 return isAscending(s) 185 ? s.tailSet(Integer.MIN_VALUE, true) 186 : s.tailSet(Integer.MAX_VALUE, true); 187 } 188 189 static void testEmptyCollection(Collection<?> c) { 190 check(c.isEmpty()); 191 equal(c.size(), 0); 192 equal(c.toString(),"[]"); 193 equal(c.toArray().length, 0); 194 equal(c.toArray(new Object[0]).length, 0); 195 196 Object[] a = new Object[1]; a[0] = Boolean.TRUE; 197 equal(c.toArray(a), a); 198 equal(a[0], null); 199 check(! c.iterator().hasNext()); 200 } 201 202 static void testEmptySet(Set<?> c) { 203 testEmptyCollection(c); 204 equal(c.hashCode(), 0); 205 equal2(c, Collections.<Integer>emptySet()); 206 } 207 208 static void testEmptyMap(final Map<?,?> m) { 209 check(m.isEmpty()); 210 equal(m.size(), 0); 211 equal(m.toString(),"{}"); 212 equal(m.hashCode(), 0); 213 testEmptySet(m.keySet()); 214 testEmptySet(m.entrySet()); 215 testEmptyCollection(m.values()); 216 } 217 218 static final Random rnd; 219 220 static { 221 // sufficiently random for this test 222 long seed = System.nanoTime(); 223 System.out.println(LockStep.class.getCanonicalName() + ": Trial random seed: " + seed ); 224 225 rnd = new Random(seed); 226 } 227 228 static void equalNext(final Iterator<?> it, Object expected) { 229 if (maybe(2)) 230 check(it.hasNext()); 231 equal(it.next(), expected); 232 } 233 234 static Comparator comparator(NavigableSet s) { 235 Comparator cmp = s.comparator(); 236 return cmp != null ? cmp : new Comparator() { 237 public int compare(Object o1, Object o2) { 238 return ((Comparable) o1).compareTo(o2); }}; 239 } 240 241 static Comparator comparator(NavigableMap m) { 242 Comparator cmp = m.comparator(); 243 return cmp != null ? cmp : new Comparator() { 244 public int compare(Object o1, Object o2) { 245 return ((Comparable) o1).compareTo(o2); }}; 246 } 247 248 static void checkNavigableSet(final NavigableSet s) { 249 if (s.comparator() == null) 250 check(s.descendingSet().descendingSet().comparator() == null); 251 equal(s.isEmpty(), s.size() == 0); 252 equal2(s, s.descendingSet()); 253 if (maybe(4) && s instanceof Serializable) { 254 try { 255 equal2(s, serialClone(s)); 256 } catch (RuntimeException uhoh) { 257 if (!(uhoh.getCause() instanceof NotSerializableException)) { 258 throw uhoh; 259 } 260 } 261 } 262 Comparator cmp = comparator(s); 263 if (s.isEmpty()) { 264 THROWS(NoSuchElementException.class, 265 () -> s.first(), 266 () -> s.last()); 267 equal(null, s.lower(1)); 268 equal(null, s.floor(1)); 269 equal(null, s.ceiling(1)); 270 equal(null, s.higher(1)); 271 } else { 272 Object a = s.first(); 273 Object z = s.last(); 274 equal(s.lower(a), null); 275 equal(s.higher(z), null); 276 equal2(s, s.tailSet(a)); 277 equal2(s, s.headSet(z, true)); 278 equal2(s, s.subSet(a, true, z, true)); 279 280 testEmptySet(s.subSet(a, true, a, false)); 281 testEmptySet(s.subSet(z, true, z, false)); 282 testEmptySet(s.headSet(a, false)); 283 testEmptySet(s.tailSet(z, false)); 284 285 equal2(s.headSet(a, true), singleton(a)); 286 equal2(s.tailSet(z, true), singleton(z)); 287 } 288 Iterator[] its = new Iterator[] { 289 s.iterator(), 290 s.descendingSet().descendingSet().iterator(), 291 }; 292 for (final Iterator it : its) 293 if (maybe(4)) 294 THROWS(IllegalStateException.class, () -> it.remove()); 295 Object prev = null; 296 for (Object e : s) { 297 check(s.contains(e)); 298 for (Iterator it : its) equalNext(it, e); 299 equal(e, s.ceiling(e)); 300 equal(e, s.floor(e)); 301 check(s.higher(e) == null || cmp.compare(e, s.higher(e)) < 0); 302 equal(s.lower(e), prev); 303 if (prev == null) { 304 } else { 305 check(cmp.compare(prev, e) < 0); 306 } 307 prev = e; 308 } 309 for (final Iterator it : its) { 310 if (maybe(2)) 311 check(! it.hasNext()); 312 Fun fun = () -> it.next(); 313 THROWS(NoSuchElementException.class, fun, fun, fun); 314 } 315 } 316 317 static void equalIterators(final Iterator<?> it1, 318 final Iterator<?> it2) { 319 while (it1.hasNext()) { 320 if (maybe(2)) 321 check(it2.hasNext()); 322 equal(it1.next(), it2.next()); 323 } 324 check(! it2.hasNext()); 325 } 326 327 static void equalSetsLeaf(final Set s1, final Set s2) { 328 equal2(s1, s2); 329 equal( s1.size(), s2.size()); 330 equal( s1.isEmpty(), s2.isEmpty()); 331 equal( s1.hashCode(), s2.hashCode()); 332 equal( s1.toString(), s2.toString()); 333 equal( s1.containsAll(s2), s2.containsAll(s1)); 334 } 335 336 static void equalNavigableSetsLeaf(final NavigableSet s1, 337 final NavigableSet s2) { 338 equal2(s1, s2); 339 equal( s1.size(), s2.size()); 340 equal( s1.isEmpty(), s2.isEmpty()); 341 equal( s1.hashCode(), s2.hashCode()); 342 equal( s1.toString(), s2.toString()); 343 if (! s1.isEmpty()) { 344 equal(s1.first(), s2.first()); 345 equal(s1.last(), s2.last()); 346 } 347 equalIterators(s1.iterator(), s2.iterator()); 348 equalIterators(s1.descendingIterator(), s2.descendingIterator()); 349 checkNavigableSet(s1); 350 checkNavigableSet(s2); 351 } 352 353 static void equalNavigableSets(final NavigableSet s1, 354 final NavigableSet s2) { 355 equalNavigableSetsLeaf(s1, s2); 356 equalNavigableSetsLeaf(s1.descendingSet(), s2.descendingSet()); 357 equalNavigableSetsLeaf(s1.descendingSet().descendingSet(), s2); 358 Object min = s1.isEmpty() ? Integer.MIN_VALUE : s1.first(); 359 Object max = s2.isEmpty() ? Integer.MAX_VALUE : s2.last(); 360 if (s1.comparator() != null && 361 s1.comparator().compare(min, max) > 0) { 362 Object tmp = min; min = max; max = tmp; 363 } 364 365 equalNavigableSetsLeaf(s1.subSet(min, true, max, true), 366 s2.subSet(min, true, max, true)); 367 equalNavigableSetsLeaf(s1.tailSet(min, true), 368 s2.tailSet(min, true)); 369 equalNavigableSetsLeaf(s1.headSet(max, true), 370 s2.headSet(max, true)); 371 equalNavigableSetsLeaf((NavigableSet) s1.subSet(min, max), 372 (NavigableSet) s2.subSet(min, max)); 373 equalNavigableSetsLeaf((NavigableSet) s1.tailSet(min), 374 (NavigableSet) s2.tailSet(min)); 375 equalNavigableSetsLeaf((NavigableSet) s1.headSet(max), 376 (NavigableSet) s2.headSet(max)); 377 } 378 379 // Destined for a Collections.java near you? 380 static <T> T[] concat(T[]... arrays) { 381 int len = 0; 382 for (int i = 0; i < arrays.length; i++) 383 len += arrays[i].length; 384 T[] a = (T[])java.lang.reflect.Array 385 .newInstance(arrays[0].getClass().getComponentType(), len); 386 int k = 0; 387 for (int i = 0; i < arrays.length; i++) { 388 T[] array = arrays[i]; 389 System.arraycopy(array, 0, a, k, array.length); 390 k += array.length; 391 } 392 return a; 393 } 394 395 static void checkNavigableMap(final NavigableMap m) { 396 if (m.comparator() == null) { 397 check(m.descendingMap().descendingMap().comparator() == null); 398 check(m.descendingKeySet().descendingSet().comparator() == null); 399 } 400 equal(m.isEmpty(), m.size() == 0); 401 equal2(m, m.descendingMap()); 402 if (maybe(4)) 403 equal2(m, serialClone(m)); 404 equal2(m.keySet(), m.descendingKeySet()); 405 Comparator cmp = comparator(m); 406 if (m.isEmpty()) { 407 THROWS(NoSuchElementException.class, 408 () -> m.firstKey(), 409 () -> m.lastKey()); 410 equal(null, m.firstEntry()); 411 equal(null, m.lastEntry()); 412 equal(null, m.pollFirstEntry()); 413 equal(null, m.pollLastEntry()); 414 equal(null, m.lowerKey(1)); 415 equal(null, m.floorKey(1)); 416 equal(null, m.ceilingKey(1)); 417 equal(null, m.higherKey(1)); 418 equal(null, m.lowerEntry(1)); 419 equal(null, m.floorEntry(1)); 420 equal(null, m.ceilingEntry(1)); 421 equal(null, m.higherEntry(1)); 422 } else { 423 Object a = m.firstKey(); 424 Object z = m.lastKey(); 425 equal(m.lowerKey(a), null); 426 equal(m.higherKey(z), null); 427 equal(a, m.firstEntry().getKey()); 428 equal(z, m.lastEntry().getKey()); 429 equal2(m, m.tailMap(a)); 430 equal2(m, m.headMap(z, true)); 431 equal2(m, m.subMap(a, true, z, true)); 432 433 testEmptyMap(m.subMap(a, true, a, false)); 434 testEmptyMap(m.subMap(z, true, z, false)); 435 testEmptyMap(m.headMap(a, false)); 436 testEmptyMap(m.tailMap(z, false)); 437 438 equal2(m.headMap(a, true), singletonMap(a, m.get(a))); 439 equal2(m.tailMap(z, true), singletonMap(z, m.get(z))); 440 } 441 442 Iterator[] kits = new Iterator[] { 443 m.keySet().iterator(), 444 m.descendingMap().descendingKeySet().iterator(), 445 m.descendingKeySet().descendingSet().iterator(), 446 }; 447 Iterator[] vits = new Iterator[] { 448 m.values().iterator(), 449 m.descendingMap().descendingMap().values().iterator(), 450 }; 451 Iterator[] eits = new Iterator[] { 452 m.entrySet().iterator(), 453 m.descendingMap().descendingMap().entrySet().iterator(), 454 }; 455 Iterator[] its = concat(kits, vits, eits); 456 for (final Iterator it : its) 457 if (maybe(4)) 458 THROWS(IllegalStateException.class, () -> it.remove()); 459 Map.Entry prev = null; 460 for (Map.Entry e : (Set<Map.Entry>) m.entrySet()) { 461 Object k = e.getKey(); 462 Object v = e.getValue(); 463 check(m.containsKey(k)); 464 check(m.containsValue(v)); 465 for (Iterator kit : kits) equalNext(kit, k); 466 for (Iterator vit : vits) equalNext(vit, v); 467 for (Iterator eit : eits) equalNext(eit, e); 468 equal(k, m.ceilingKey(k)); 469 equal(k, m.ceilingEntry(k).getKey()); 470 equal(k, m.floorKey(k)); 471 equal(k, m.floorEntry(k).getKey()); 472 check(m.higherKey(k) == null || cmp.compare(k, m.higherKey(k)) < 0); 473 check(m.lowerKey(k) == null || cmp.compare(k, m.lowerKey(k)) > 0); 474 equal(m.lowerEntry(k), prev); 475 if (prev == null) { 476 equal(m.lowerKey(k), null); 477 } else { 478 equal(m.lowerKey(k), prev.getKey()); 479 check(cmp.compare(prev.getKey(), e.getKey()) < 0); 480 } 481 prev = e; 482 } 483 for (final Iterator it : its) { 484 if (maybe(2)) 485 check(! it.hasNext()); 486 Fun fun = () -> it.next(); 487 THROWS(NoSuchElementException.class, fun, fun, fun); 488 } 489 } 490 491 static void equalNavigableMapsLeaf(final NavigableMap m1, 492 final NavigableMap m2) { 493 equal2(m1, m2); 494 equal( m1.size(), m2.size()); 495 equal( m1.isEmpty(), m2.isEmpty()); 496 equal( m1.hashCode(), m2.hashCode()); 497 equal( m1.toString(), m2.toString()); 498 equal2(m1.firstEntry(), m2.firstEntry()); 499 equal2(m1.lastEntry(), m2.lastEntry()); 500 checkNavigableMap(m1); 501 checkNavigableMap(m2); 502 } 503 504 static void equalNavigableMaps(NavigableMap m1, 505 NavigableMap m2) { 506 equalNavigableMapsLeaf(m1, m2); 507 equalSetsLeaf(m1.keySet(), m2.keySet()); 508 equalNavigableSets(m1.navigableKeySet(), 509 m2.navigableKeySet()); 510 equalNavigableSets(m1.descendingKeySet(), 511 m2.descendingKeySet()); 512 equal2(m1.entrySet(), 513 m2.entrySet()); 514 equalNavigableMapsLeaf(m1.descendingMap(), 515 m2.descendingMap()); 516 equalNavigableMapsLeaf(m1.descendingMap().descendingMap(), 517 m2); 518 equalNavigableSetsLeaf((NavigableSet) m1.descendingMap().keySet(), 519 (NavigableSet) m2.descendingMap().keySet()); 520 equalNavigableSetsLeaf(m1.descendingMap().descendingKeySet(), 521 m2.descendingMap().descendingKeySet()); 522 equal2(m1.descendingMap().entrySet(), 523 m2.descendingMap().entrySet()); 524 525 //---------------------------------------------------------------- 526 // submaps 527 //---------------------------------------------------------------- 528 Object min = Integer.MIN_VALUE; 529 Object max = Integer.MAX_VALUE; 530 if (m1.comparator() != null 531 && m1.comparator().compare(min, max) > 0) { 532 Object tmp = min; min = max; max = tmp; 533 } 534 switch (rnd.nextInt(6)) { 535 case 0: 536 equalNavigableMapsLeaf(m1.subMap(min, true, max, true), 537 m2.subMap(min, true, max, true)); 538 break; 539 case 1: 540 equalNavigableMapsLeaf(m1.tailMap(min, true), 541 m2.tailMap(min, true)); 542 break; 543 case 2: 544 equalNavigableMapsLeaf(m1.headMap(max, true), 545 m2.headMap(max, true)); 546 break; 547 case 3: 548 equalNavigableMapsLeaf((NavigableMap) m1.subMap(min, max), 549 (NavigableMap) m2.subMap(min, max)); 550 break; 551 case 4: 552 equalNavigableMapsLeaf((NavigableMap) m1.tailMap(min), 553 (NavigableMap) m2.tailMap(min)); 554 break; 555 case 5: 556 equalNavigableMapsLeaf((NavigableMap) m1.headMap(max), 557 (NavigableMap) m2.headMap(max)); 558 break; 559 } 560 } 561 562 abstract static class MapFrobber { abstract void frob(NavigableMap m); } 563 abstract static class SetFrobber { abstract void frob(NavigableSet m); } 564 565 static MapFrobber randomAdder(NavigableMap m) { 566 final Integer k = unusedKey(m); 567 final MapFrobber[] randomAdders = { 568 new MapFrobber() {void frob(NavigableMap m) { 569 equal(m.put(k, k+1), null); 570 equal(m.get(k), k+1); 571 if (maybe(4)) { 572 equal(m.put(k, k+1), k+1); 573 equal(m.get(k), k+1);}}}, 574 new MapFrobber() {void frob(NavigableMap m) { 575 m.descendingMap().put(k, k+1); 576 equal(m.get(k), k+1);}}, 577 new MapFrobber() {void frob(NavigableMap m) { 578 m.tailMap(k,true).headMap(k,true).put(k,k+1);}}, 579 new MapFrobber() {void frob(NavigableMap m) { 580 m.tailMap(k,true).headMap(k,true).descendingMap().put(k,k+1);}} 581 }; 582 return new MapFrobber() {void frob(NavigableMap m) { 583 randomAdders[rnd.nextInt(randomAdders.length)].frob(m); 584 if (maybe(2)) equal(m.get(k), k+1); 585 if (maybe(4)) { 586 equal(m.put(k, k+1), k+1); 587 equal(m.get(k), k+1);}}}; 588 } 589 590 static SetFrobber randomAdder(NavigableSet s) { 591 final Integer e = unusedElt(s); 592 final SetFrobber[] randomAdders = { 593 new SetFrobber() {void frob(NavigableSet s) { 594 check(s.add(e));}}, 595 new SetFrobber() {void frob(NavigableSet s) { 596 s.descendingSet().add(e);}}, 597 new SetFrobber() {void frob(NavigableSet s) { 598 s.tailSet(e,true).headSet(e,true).add(e);}}, 599 new SetFrobber() {void frob(NavigableSet s) { 600 s.descendingSet().tailSet(e,true).headSet(e,true).add(e);}} 601 }; 602 return new SetFrobber() {void frob(NavigableSet s) { 603 if (maybe(2)) check(! s.contains(e)); 604 randomAdders[rnd.nextInt(randomAdders.length)].frob(s); 605 if (maybe(2)) check(! s.add(e)); 606 if (maybe(2)) check(s.contains(e));}}; 607 } 608 609 static Integer unusedElt(NavigableSet s) { 610 Integer e; 611 do { e = rnd.nextInt(1024); } 612 while (s.contains(e)); 613 return e; 614 } 615 616 static Integer unusedKey(NavigableMap m) { 617 Integer k; 618 do { k = rnd.nextInt(1024); } 619 while (m.containsKey(k)); 620 return k; 621 } 622 623 static Integer usedKey(NavigableMap m) { 624 Integer x = rnd.nextInt(1024); 625 Integer floor = (Integer) m.floorKey(x); 626 Integer ceiling = (Integer) m.ceilingKey(x); 627 if (floor != null) return floor; 628 check(ceiling != null); 629 return ceiling; 630 } 631 632 static Integer usedElt(NavigableSet s) { 633 Integer x = rnd.nextInt(1024); 634 Integer floor = (Integer) s.floor(x); 635 Integer ceiling = (Integer) s.ceiling(x); 636 if (floor != null) return floor; 637 check(ceiling != null); 638 return ceiling; 639 } 640 641 static void checkUnusedKey(NavigableMap m, Object k) { 642 check(! m.containsKey(k)); 643 equal(m.get(k), null); 644 if (maybe(2)) 645 equal(m.remove(k), null); 646 } 647 648 static void checkUnusedElt(NavigableSet s, Object e) { 649 if (maybe(2)) 650 check(! s.contains(e)); 651 if (maybe(2)) { 652 check(s.ceiling(e) != e); 653 check(s.floor(e) != e); 654 } 655 if (maybe(2)) 656 check(! s.remove(e)); 657 } 658 659 static Fun remover(final Iterator it) { 660 return () -> it.remove(); 661 } 662 663 static MapFrobber randomRemover(NavigableMap m) { 664 final Integer k = usedKey(m); 665 final MapFrobber[] randomRemovers = { 666 new MapFrobber() {void frob(NavigableMap m) { 667 Map.Entry e = m.firstEntry(); 668 equal(m.pollFirstEntry(), e); 669 checkUnusedKey(m, e.getKey());}}, 670 new MapFrobber() {void frob(NavigableMap m) { 671 Map.Entry e = m.lastEntry(); 672 equal(m.pollLastEntry(), e); 673 checkUnusedKey(m, e.getKey());}}, 674 new MapFrobber() {void frob(NavigableMap m) { 675 check(m.remove(k) != null); 676 checkUnusedKey(m, k);}}, 677 new MapFrobber() {void frob(NavigableMap m) { 678 m.subMap(k, true, k, true).clear(); 679 checkUnusedKey(m, k);}}, 680 new MapFrobber() {void frob(NavigableMap m) { 681 m.descendingMap().subMap(k, true, k, true).clear(); 682 checkUnusedKey(m, k);}}, 683 new MapFrobber() {void frob(NavigableMap m) { 684 final Iterator it = m.keySet().iterator(); 685 while (it.hasNext()) 686 if (it.next().equals(k)) { 687 it.remove(); 688 if (maybe(2)) 689 THROWS(IllegalStateException.class, 690 () -> it.remove()); 691 } 692 checkUnusedKey(m, k);}}, 693 new MapFrobber() {void frob(NavigableMap m) { 694 final Iterator it = m.navigableKeySet().descendingIterator(); 695 while (it.hasNext()) 696 if (it.next().equals(k)) { 697 it.remove(); 698 if (maybe(2)) 699 THROWS(IllegalStateException.class, 700 () -> it.remove()); 701 } 702 checkUnusedKey(m, k);}}, 703 new MapFrobber() {void frob(NavigableMap m) { 704 final Iterator<Map.Entry> it = m.entrySet().iterator(); 705 while (it.hasNext()) 706 if (it.next().getKey().equals(k)) { 707 it.remove(); 708 if (maybe(2)) 709 THROWS(IllegalStateException.class, remover(it)); 710 } 711 checkUnusedKey(m, k);}}, 712 }; 713 714 return randomRemovers[rnd.nextInt(randomRemovers.length)]; 715 } 716 717 static SetFrobber randomRemover(NavigableSet s) { 718 final Integer e = usedElt(s); 719 720 final SetFrobber[] randomRemovers = { 721 new SetFrobber() {void frob(NavigableSet s) { 722 Object e = s.first(); 723 equal(s.pollFirst(), e); 724 checkUnusedElt(s, e);}}, 725 new SetFrobber() {void frob(NavigableSet s) { 726 Object e = s.last(); 727 equal(s.pollLast(), e); 728 checkUnusedElt(s, e);}}, 729 new SetFrobber() {void frob(NavigableSet s) { 730 check(s.remove(e)); 731 checkUnusedElt(s, e);}}, 732 new SetFrobber() {void frob(NavigableSet s) { 733 s.subSet(e, true, e, true).clear(); 734 checkUnusedElt(s, e);}}, 735 new SetFrobber() {void frob(NavigableSet s) { 736 s.descendingSet().subSet(e, true, e, true).clear(); 737 checkUnusedElt(s, e);}}, 738 new SetFrobber() {void frob(NavigableSet s) { 739 final Iterator it = s.iterator(); 740 while (it.hasNext()) 741 if (it.next().equals(e)) { 742 it.remove(); 743 if (maybe(2)) 744 THROWS(IllegalStateException.class, 745 () -> it.remove()); 746 } 747 checkUnusedElt(s, e);}}, 748 new SetFrobber() {void frob(NavigableSet s) { 749 final Iterator it = s.descendingSet().iterator(); 750 while (it.hasNext()) 751 if (it.next().equals(e)) { 752 it.remove(); 753 if (maybe(2)) 754 THROWS(IllegalStateException.class, 755 () -> it.remove()); 756 } 757 checkUnusedElt(s, e);}}, 758 new SetFrobber() {void frob(NavigableSet s) { 759 final Iterator it = s.descendingIterator(); 760 while (it.hasNext()) 761 if (it.next().equals(e)) { 762 it.remove(); 763 if (maybe(2)) 764 THROWS(IllegalStateException.class, 765 () -> it.remove()); 766 } 767 checkUnusedElt(s, e);}} 768 }; 769 770 return randomRemovers[rnd.nextInt(randomRemovers.length)]; 771 } 772 773 static void lockStep(NavigableMap m1, 774 NavigableMap m2) { 775 if (! (thorough || maybe(3))) return; 776 if (maybe(4)) m1 = serialClone(m1); 777 if (maybe(4)) m2 = serialClone(m2); 778 779 List<NavigableMap> maps = Arrays.asList(m1, m2); 780 for (NavigableMap m : maps) testEmptyMap(m); 781 final Set<Integer> ints = new HashSet<>(); 782 while (ints.size() < size) 783 ints.add(rnd.nextInt(1024)); 784 final Integer[] elts = ints.toArray(new Integer[size]); 785 for (int i = 0; i < size; i++) { 786 MapFrobber adder = randomAdder(m1); 787 for (final NavigableMap m : maps) { 788 adder.frob(m); 789 equal(m.size(), i+1); 790 } 791 equalNavigableMaps(m1, m2); 792 } 793 for (final NavigableMap m : maps) { 794 final Object e = usedKey(m); 795 THROWS(IllegalArgumentException.class, 796 () -> {m.subMap(e,true,e,false) 797 .subMap(e,true,e,true);}, 798 () -> {m.subMap(e,false,e,true) 799 .subMap(e,true,e,true);}, 800 () -> m.tailMap(e,false).tailMap(e,true), 801 () -> m.headMap(e,false).headMap(e,true)); 802 } 803 //System.out.printf("%s%n", m1); 804 for (int i = size; i > 0; i--) { 805 MapFrobber remover = randomRemover(m1); 806 for (final NavigableMap m : maps) { 807 remover.frob(m); 808 equal(m.size(), i-1); 809 } 810 equalNavigableMaps(m1, m2); 811 } 812 for (NavigableMap m : maps) testEmptyMap(m); 813 } 814 815 static void lockStep(NavigableSet s1, 816 NavigableSet s2) { 817 if (! (thorough || maybe(3))) return; 818 if (maybe(4)) s1 = serialClone(s1); 819 if (maybe(4)) s2 = serialClone(s2); 820 821 List<NavigableSet> sets = Arrays.asList(s1, s2); 822 for (NavigableSet s : sets) testEmptySet(s); 823 final Set<Integer> ints = new HashSet<>(); 824 while (ints.size() < size) 825 ints.add(rnd.nextInt(1024)); 826 final Integer[] elts = ints.toArray(new Integer[size]); 827 for (int i = 0; i < size; i++) { 828 SetFrobber adder = randomAdder(s1); 829 for (final NavigableSet s : sets) { 830 adder.frob(s); 831 equal(s.size(), i+1); 832 } 833 equalNavigableSets(s1, s2); 834 } 835 for (final NavigableSet s : sets) { 836 final Object e = usedElt(s); 837 THROWS(IllegalArgumentException.class, 838 () -> {s.subSet(e,true,e,false) 839 .subSet(e,true,e,true);}, 840 () -> {s.subSet(e,false,e,true) 841 .subSet(e,true,e,true);}, 842 () -> s.tailSet(e,false).tailSet(e,true), 843 () -> s.headSet(e,false).headSet(e,true)); 844 } 845 //System.out.printf("%s%n", s1); 846 for (int i = size; i > 0; i--) { 847 SetFrobber remover = randomRemover(s1); 848 for (final NavigableSet s : sets) { 849 remover.frob(s); 850 equal(s.size(), i-1); 851 } 852 equalNavigableSets(s1, s2); 853 } 854 for (NavigableSet s : sets) testEmptySet(s); 855 } 856 857 //--------------------- Infrastructure --------------------------- 858 static volatile int passed = 0, failed = 0; 859 static void pass() { passed++; } 860 static void fail() { failed++; Thread.dumpStack(); } 861 static void fail(String msg) { System.out.println(msg); fail(); } 862 static void unexpected(Throwable t) { failed++; t.printStackTrace(); } 863 static void check(boolean cond) { if (cond) pass(); else fail(); } 864 static void equal(Object x, Object y) { 865 if (x == null ? y == null : x.equals(y)) pass(); 866 else {System.out.println(x + " not equal to " + y); fail();}} 867 static void equal2(Object x, Object y) {equal(x, y); equal(y, x);} 868 public static void main(String[] args) throws Throwable { 869 try { realMain(args); } catch (Throwable t) { unexpected(t); } 870 871 System.out.printf("%nPassed = %d, failed = %d%n%n", passed, failed); 872 if (failed > 0) throw new Exception("Some tests failed"); 873 } 874 interface Fun {void f() throws Throwable;} 875 static void THROWS(Class<? extends Throwable> k, Fun... fs) { 876 for (Fun f : fs) 877 try { f.f(); fail("Expected " + k.getName() + " not thrown"); } 878 catch (Throwable t) { 879 if (k.isAssignableFrom(t.getClass())) pass(); 880 else unexpected(t);}} 881 static byte[] serializedForm(Object obj) { 882 try { 883 ByteArrayOutputStream baos = new ByteArrayOutputStream(); 884 new ObjectOutputStream(baos).writeObject(obj); 885 return baos.toByteArray(); 886 } catch (IOException e) { throw new RuntimeException(e); }} 887 static Object readObject(byte[] bytes) 888 throws IOException, ClassNotFoundException { 889 InputStream is = new ByteArrayInputStream(bytes); 890 return new ObjectInputStream(is).readObject();} 891 @SuppressWarnings("unchecked") 892 static <T> T serialClone(T obj) { 893 try { return (T) readObject(serializedForm(obj)); } 894 catch (Error|RuntimeException e) { throw e; } 895 catch (Throwable e) { throw new RuntimeException(e); } 896 } 897 }