1 /* 2 * Copyright (C) 2008 The Guava Authors 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.google.common.base; 18 19 import static com.google.common.base.CharMatcher.anyOf; 20 import static com.google.common.base.CharMatcher.forPredicate; 21 import static com.google.common.base.CharMatcher.inRange; 22 import static com.google.common.base.CharMatcher.is; 23 import static com.google.common.base.CharMatcher.isNot; 24 import static com.google.common.base.CharMatcher.noneOf; 25 26 import com.google.common.annotations.GwtCompatible; 27 import com.google.common.annotations.GwtIncompatible; 28 import com.google.common.testing.NullPointerTester; 29 30 import junit.framework.AssertionFailedError; 31 import junit.framework.TestCase; 32 33 /** 34 * Unit test for {@link CharMatcher}. 35 * 36 * @author Kevin Bourrillion 37 */ 38 @GwtCompatible(emulated = true) 39 public class CharMatcherTest extends TestCase { 40 41 @GwtIncompatible("NullPointerTester") 42 public void testStaticNullPointers() throws Exception { 43 NullPointerTester tester = new NullPointerTester(); 44 tester.testAllPublicStaticMethods(CharMatcher.class); 45 tester.testAllPublicInstanceMethods(CharMatcher.ANY); 46 tester.testAllPublicInstanceMethods(CharMatcher.anyOf("abc")); 47 } 48 49 private static final CharMatcher WHATEVER = new CharMatcher() { 50 @Override public boolean matches(char c) { 51 throw new AssertionFailedError( 52 "You weren't supposed to actually invoke me!"); 53 } 54 }; 55 56 public void testAnyAndNone_logicalOps() throws Exception { 57 // These are testing behavior that's never promised by the API, but since 58 // we're lucky enough that these do pass, it saves us from having to write 59 // more excruciating tests! Hooray! 60 61 assertSame(CharMatcher.ANY, CharMatcher.NONE.negate()); 62 assertSame(CharMatcher.NONE, CharMatcher.ANY.negate()); 63 64 assertSame(WHATEVER, CharMatcher.ANY.and(WHATEVER)); 65 assertSame(CharMatcher.ANY, CharMatcher.ANY.or(WHATEVER)); 66 67 assertSame(CharMatcher.NONE, CharMatcher.NONE.and(WHATEVER)); 68 assertSame(WHATEVER, CharMatcher.NONE.or(WHATEVER)); 69 } 70 71 // The rest of the behavior of ANY and NONE will be covered in the tests for 72 // the text processing methods below. 73 74 // The next tests require ICU4J and have, at least for now, been sliced out 75 // of the open-source view of the tests. 76 77 @GwtIncompatible("Character.isISOControl") 78 public void testJavaIsoControl() { 79 for (int c = 0; c <= Character.MAX_VALUE; c++) { 80 assertEquals("" + c, Character.isISOControl(c), 81 CharMatcher.JAVA_ISO_CONTROL.matches((char) c)); 82 } 83 } 84 85 // There's no way to test LEGACY_WHITESPACE, really; it just is what it is. 86 87 // Omitting tests for the rest of the JAVA_* constants as these are defined 88 // as extremely straightforward pass-throughs to the JDK methods. 89 90 // We're testing the is(), isNot(), anyOf(), noneOf() and inRange() methods 91 // below by testing their text-processing methods. 92 93 // The organization of this test class is unusual, as it's not done by 94 // method, but by overall "scenario". Also, the variety of actual tests we 95 // do borders on absurd overkill. Better safe than sorry, though? 96 97 public void testEmpty() throws Exception { 98 doTestEmpty(CharMatcher.ANY); 99 doTestEmpty(CharMatcher.NONE); 100 doTestEmpty(is('a')); 101 doTestEmpty(isNot('a')); 102 doTestEmpty(anyOf("")); 103 doTestEmpty(anyOf("x")); 104 doTestEmpty(anyOf("xy")); 105 doTestEmpty(anyOf("CharMatcher")); 106 doTestEmpty(noneOf("CharMatcher")); 107 doTestEmpty(inRange('n', 'q')); 108 doTestEmpty(forPredicate(Predicates.equalTo('c'))); 109 } 110 111 @GwtIncompatible("NullPointerTester") 112 public void testNull() throws Exception { 113 doTestNull(CharMatcher.ANY); 114 doTestNull(CharMatcher.NONE); 115 doTestNull(is('a')); 116 doTestNull(isNot('a')); 117 doTestNull(anyOf("")); 118 doTestNull(anyOf("x")); 119 doTestNull(anyOf("xy")); 120 doTestNull(anyOf("CharMatcher")); 121 doTestNull(noneOf("CharMatcher")); 122 doTestNull(inRange('n', 'q')); 123 doTestNull(forPredicate(Predicates.equalTo('c'))); 124 } 125 126 private void doTestEmpty(CharMatcher matcher) throws Exception { 127 reallyTestEmpty(matcher); 128 reallyTestEmpty(matcher.negate()); 129 reallyTestEmpty(matcher.precomputed()); 130 } 131 132 private void reallyTestEmpty(CharMatcher matcher) throws Exception { 133 assertEquals(-1, matcher.indexIn("")); 134 assertEquals(-1, matcher.indexIn("", 0)); 135 try { 136 matcher.indexIn("", 1); 137 fail(); 138 } catch (IndexOutOfBoundsException expected) { 139 } 140 try { 141 matcher.indexIn("", -1); 142 fail(); 143 } catch (IndexOutOfBoundsException expected) { 144 } 145 assertEquals(-1, matcher.lastIndexIn("")); 146 assertFalse(matcher.matchesAnyOf("")); 147 assertTrue(matcher.matchesAllOf("")); 148 assertTrue(matcher.matchesNoneOf("")); 149 assertEquals("", matcher.removeFrom("")); 150 assertEquals("", matcher.replaceFrom("", 'z')); 151 assertEquals("", matcher.replaceFrom("", "ZZ")); 152 assertEquals("", matcher.trimFrom("")); 153 assertEquals(0, matcher.countIn("")); 154 } 155 156 @GwtIncompatible("NullPointerTester") 157 private void doTestNull(CharMatcher matcher) throws Exception { 158 NullPointerTester tester = new NullPointerTester(); 159 tester.testAllPublicInstanceMethods(matcher); 160 } 161 162 public void testNoMatches() { 163 doTestNoMatches(CharMatcher.NONE, "blah"); 164 doTestNoMatches(is('a'), "bcde"); 165 doTestNoMatches(isNot('a'), "aaaa"); 166 doTestNoMatches(anyOf(""), "abcd"); 167 doTestNoMatches(anyOf("x"), "abcd"); 168 doTestNoMatches(anyOf("xy"), "abcd"); 169 doTestNoMatches(anyOf("CharMatcher"), "zxqy"); 170 doTestNoMatches(noneOf("CharMatcher"), "ChMa"); 171 doTestNoMatches(inRange('p', 'x'), "mom"); 172 doTestNoMatches(forPredicate(Predicates.equalTo('c')), "abe"); 173 doTestNoMatches(inRange('A', 'Z').and(inRange('F', 'K').negate()), "F1a"); 174 doTestNoMatches(CharMatcher.DIGIT, "\tAz()"); 175 doTestNoMatches(CharMatcher.JAVA_DIGIT, "\tAz()"); 176 doTestNoMatches(CharMatcher.DIGIT.and(CharMatcher.ASCII), "\tAz()"); 177 doTestNoMatches(CharMatcher.SINGLE_WIDTH, "\u05bf\u3000"); 178 } 179 180 private void doTestNoMatches(CharMatcher matcher, String s) { 181 reallyTestNoMatches(matcher, s); 182 reallyTestAllMatches(matcher.negate(), s); 183 reallyTestNoMatches(matcher.precomputed(), s); 184 reallyTestAllMatches(matcher.negate().precomputed(), s); 185 reallyTestAllMatches(matcher.precomputed().negate(), s); 186 reallyTestNoMatches(forPredicate(matcher), s); 187 188 reallyTestNoMatches(matcher, new StringBuilder(s)); 189 } 190 191 public void testAllMatches() { 192 doTestAllMatches(CharMatcher.ANY, "blah"); 193 doTestAllMatches(isNot('a'), "bcde"); 194 doTestAllMatches(is('a'), "aaaa"); 195 doTestAllMatches(noneOf("CharMatcher"), "zxqy"); 196 doTestAllMatches(anyOf("x"), "xxxx"); 197 doTestAllMatches(anyOf("xy"), "xyyx"); 198 doTestAllMatches(anyOf("CharMatcher"), "ChMa"); 199 doTestAllMatches(inRange('m', 'p'), "mom"); 200 doTestAllMatches(forPredicate(Predicates.equalTo('c')), "ccc"); 201 doTestAllMatches(CharMatcher.DIGIT, "0123456789\u0ED0\u1B59"); 202 doTestAllMatches(CharMatcher.JAVA_DIGIT, "0123456789"); 203 doTestAllMatches(CharMatcher.DIGIT.and(CharMatcher.ASCII), "0123456789"); 204 doTestAllMatches(CharMatcher.SINGLE_WIDTH, "\t0123ABCdef~\u00A0\u2111"); 205 } 206 207 private void doTestAllMatches(CharMatcher matcher, String s) { 208 reallyTestAllMatches(matcher, s); 209 reallyTestNoMatches(matcher.negate(), s); 210 reallyTestAllMatches(matcher.precomputed(), s); 211 reallyTestNoMatches(matcher.negate().precomputed(), s); 212 reallyTestNoMatches(matcher.precomputed().negate(), s); 213 reallyTestAllMatches(forPredicate(matcher), s); 214 215 reallyTestAllMatches(matcher, new StringBuilder(s)); 216 } 217 218 private void reallyTestNoMatches(CharMatcher matcher, CharSequence s) { 219 assertFalse(matcher.matches(s.charAt(0))); 220 assertEquals(-1, matcher.indexIn(s)); 221 assertEquals(-1, matcher.indexIn(s, 0)); 222 assertEquals(-1, matcher.indexIn(s, 1)); 223 assertEquals(-1, matcher.indexIn(s, s.length())); 224 try { 225 matcher.indexIn(s, s.length() + 1); 226 fail(); 227 } catch (IndexOutOfBoundsException expected) { 228 } 229 try { 230 matcher.indexIn(s, -1); 231 fail(); 232 } catch (IndexOutOfBoundsException expected) { 233 } 234 assertEquals(-1, matcher.lastIndexIn(s)); 235 assertFalse(matcher.matchesAnyOf(s)); 236 assertFalse(matcher.matchesAllOf(s)); 237 assertTrue(matcher.matchesNoneOf(s)); 238 239 assertEquals(s.toString(), matcher.removeFrom(s)); 240 assertEquals(s.toString(), matcher.replaceFrom(s, 'z')); 241 assertEquals(s.toString(), matcher.replaceFrom(s, "ZZ")); 242 assertEquals(s.toString(), matcher.trimFrom(s)); 243 assertEquals(0, matcher.countIn(s)); 244 } 245 246 private void reallyTestAllMatches(CharMatcher matcher, CharSequence s) { 247 assertTrue(matcher.matches(s.charAt(0))); 248 assertEquals(0, matcher.indexIn(s)); 249 assertEquals(0, matcher.indexIn(s, 0)); 250 assertEquals(1, matcher.indexIn(s, 1)); 251 assertEquals(-1, matcher.indexIn(s, s.length())); 252 assertEquals(s.length() - 1, matcher.lastIndexIn(s)); 253 assertTrue(matcher.matchesAnyOf(s)); 254 assertTrue(matcher.matchesAllOf(s)); 255 assertFalse(matcher.matchesNoneOf(s)); 256 assertEquals("", matcher.removeFrom(s)); 257 assertEquals(Strings.repeat("z", s.length()), 258 matcher.replaceFrom(s, 'z')); 259 assertEquals(Strings.repeat("ZZ", s.length()), 260 matcher.replaceFrom(s, "ZZ")); 261 assertEquals("", matcher.trimFrom(s)); 262 assertEquals(s.length(), matcher.countIn(s)); 263 } 264 265 public void testGeneral() { 266 doTestGeneral(is('a'), 'a', 'b'); 267 doTestGeneral(isNot('a'), 'b', 'a'); 268 doTestGeneral(anyOf("x"), 'x', 'z'); 269 doTestGeneral(anyOf("xy"), 'y', 'z'); 270 doTestGeneral(anyOf("CharMatcher"), 'C', 'z'); 271 doTestGeneral(noneOf("CharMatcher"), 'z', 'C'); 272 doTestGeneral(inRange('p', 'x'), 'q', 'z'); 273 } 274 275 private void doTestGeneral(CharMatcher matcher, char match, char noMatch) { 276 doTestOneCharMatch(matcher, "" + match); 277 doTestOneCharNoMatch(matcher, "" + noMatch); 278 doTestMatchThenNoMatch(matcher, "" + match + noMatch); 279 doTestNoMatchThenMatch(matcher, "" + noMatch + match); 280 } 281 282 private void doTestOneCharMatch(CharMatcher matcher, String s) { 283 reallyTestOneCharMatch(matcher, s); 284 reallyTestOneCharNoMatch(matcher.negate(), s); 285 reallyTestOneCharMatch(matcher.precomputed(), s); 286 reallyTestOneCharNoMatch(matcher.negate().precomputed(), s); 287 reallyTestOneCharNoMatch(matcher.precomputed().negate(), s); 288 } 289 290 private void doTestOneCharNoMatch(CharMatcher matcher, String s) { 291 reallyTestOneCharNoMatch(matcher, s); 292 reallyTestOneCharMatch(matcher.negate(), s); 293 reallyTestOneCharNoMatch(matcher.precomputed(), s); 294 reallyTestOneCharMatch(matcher.negate().precomputed(), s); 295 reallyTestOneCharMatch(matcher.precomputed().negate(), s); 296 } 297 298 private void doTestMatchThenNoMatch(CharMatcher matcher, String s) { 299 reallyTestMatchThenNoMatch(matcher, s); 300 reallyTestNoMatchThenMatch(matcher.negate(), s); 301 reallyTestMatchThenNoMatch(matcher.precomputed(), s); 302 reallyTestNoMatchThenMatch(matcher.negate().precomputed(), s); 303 reallyTestNoMatchThenMatch(matcher.precomputed().negate(), s); 304 } 305 306 private void doTestNoMatchThenMatch(CharMatcher matcher, String s) { 307 reallyTestNoMatchThenMatch(matcher, s); 308 reallyTestMatchThenNoMatch(matcher.negate(), s); 309 reallyTestNoMatchThenMatch(matcher.precomputed(), s); 310 reallyTestMatchThenNoMatch(matcher.negate().precomputed(), s); 311 reallyTestMatchThenNoMatch(matcher.precomputed().negate(), s); 312 } 313 314 private void reallyTestOneCharMatch(CharMatcher matcher, String s) { 315 assertTrue(matcher.matches(s.charAt(0))); 316 assertTrue(matcher.apply(s.charAt(0))); 317 assertEquals(0, matcher.indexIn(s)); 318 assertEquals(0, matcher.indexIn(s, 0)); 319 assertEquals(-1, matcher.indexIn(s, 1)); 320 assertEquals(0, matcher.lastIndexIn(s)); 321 assertTrue(matcher.matchesAnyOf(s)); 322 assertTrue(matcher.matchesAllOf(s)); 323 assertFalse(matcher.matchesNoneOf(s)); 324 assertEquals("", matcher.removeFrom(s)); 325 assertEquals("z", matcher.replaceFrom(s, 'z')); 326 assertEquals("ZZ", matcher.replaceFrom(s, "ZZ")); 327 assertEquals("", matcher.trimFrom(s)); 328 assertEquals(1, matcher.countIn(s)); 329 } 330 331 private void reallyTestOneCharNoMatch(CharMatcher matcher, String s) { 332 assertFalse(matcher.matches(s.charAt(0))); 333 assertFalse(matcher.apply(s.charAt(0))); 334 assertEquals(-1, matcher.indexIn(s)); 335 assertEquals(-1, matcher.indexIn(s, 0)); 336 assertEquals(-1, matcher.indexIn(s, 1)); 337 assertEquals(-1, matcher.lastIndexIn(s)); 338 assertFalse(matcher.matchesAnyOf(s)); 339 assertFalse(matcher.matchesAllOf(s)); 340 assertTrue(matcher.matchesNoneOf(s)); 341 342 // Note: only 'assertEquals' is promised by the API. Although they could 343 // have been assertSame() on the server side, they have to be assertEquals 344 // in GWT, because of GWT issue 4491. 345 assertEquals(s, matcher.removeFrom(s)); 346 assertEquals(s, matcher.replaceFrom(s, 'z')); 347 assertEquals(s, matcher.replaceFrom(s, "ZZ")); 348 assertEquals(s, matcher.trimFrom(s)); 349 assertEquals(0, matcher.countIn(s)); 350 } 351 352 private void reallyTestMatchThenNoMatch(CharMatcher matcher, String s) { 353 assertEquals(0, matcher.indexIn(s)); 354 assertEquals(0, matcher.indexIn(s, 0)); 355 assertEquals(-1, matcher.indexIn(s, 1)); 356 assertEquals(-1, matcher.indexIn(s, 2)); 357 assertEquals(0, matcher.lastIndexIn(s)); 358 assertTrue(matcher.matchesAnyOf(s)); 359 assertFalse(matcher.matchesAllOf(s)); 360 assertFalse(matcher.matchesNoneOf(s)); 361 assertEquals(s.substring(1), matcher.removeFrom(s)); 362 assertEquals("z" + s.substring(1), matcher.replaceFrom(s, 'z')); 363 assertEquals("ZZ" + s.substring(1), matcher.replaceFrom(s, "ZZ")); 364 assertEquals(s.substring(1), matcher.trimFrom(s)); 365 assertEquals(1, matcher.countIn(s)); 366 } 367 368 private void reallyTestNoMatchThenMatch(CharMatcher matcher, String s) { 369 assertEquals(1, matcher.indexIn(s)); 370 assertEquals(1, matcher.indexIn(s, 0)); 371 assertEquals(1, matcher.indexIn(s, 1)); 372 assertEquals(-1, matcher.indexIn(s, 2)); 373 assertEquals(1, matcher.lastIndexIn(s)); 374 assertTrue(matcher.matchesAnyOf(s)); 375 assertFalse(matcher.matchesAllOf(s)); 376 assertFalse(matcher.matchesNoneOf(s)); 377 assertEquals(s.substring(0, 1), matcher.removeFrom(s)); 378 assertEquals(s.substring(0, 1) + "z", matcher.replaceFrom(s, 'z')); 379 assertEquals(s.substring(0, 1) + "ZZ", matcher.replaceFrom(s, "ZZ")); 380 assertEquals(s.substring(0, 1), matcher.trimFrom(s)); 381 assertEquals(1, matcher.countIn(s)); 382 } 383 384 // Test collapse() a little differently than the rest, as we really want to 385 // cover lots of different configurations of input text 386 public void testCollapse() { 387 // collapsing groups of - into _ 388 doTestCollapse("-", "_"); 389 doTestCollapse("x-", "x_"); 390 doTestCollapse("-x", "_x"); 391 doTestCollapse("--", "_"); 392 doTestCollapse("x--", "x_"); 393 doTestCollapse("--x", "_x"); 394 doTestCollapse("-x-", "_x_"); 395 doTestCollapse("x-x", "x_x"); 396 doTestCollapse("---", "_"); 397 doTestCollapse("--x-", "_x_"); 398 doTestCollapse("--xx", "_xx"); 399 doTestCollapse("-x--", "_x_"); 400 doTestCollapse("-x-x", "_x_x"); 401 doTestCollapse("-xx-", "_xx_"); 402 doTestCollapse("x--x", "x_x"); 403 doTestCollapse("x-x-", "x_x_"); 404 doTestCollapse("x-xx", "x_xx"); 405 doTestCollapse("x-x--xx---x----x", "x_x_xx_x_x"); 406 407 doTestCollapseWithNoChange(""); 408 doTestCollapseWithNoChange("x"); 409 doTestCollapseWithNoChange("xx"); 410 } 411 412 private void doTestCollapse(String in, String out) { 413 // Try a few different matchers which all match '-' and not 'x' 414 assertEquals(out, is('-').collapseFrom(in, '_')); 415 assertEquals(out, is('-').or(is('#')).collapseFrom(in, '_')); 416 assertEquals(out, isNot('x').collapseFrom(in, '_')); 417 assertEquals(out, is('x').negate().collapseFrom(in, '_')); 418 assertEquals(out, anyOf("-").collapseFrom(in, '_')); 419 assertEquals(out, anyOf("-#").collapseFrom(in, '_')); 420 assertEquals(out, anyOf("-#123").collapseFrom(in, '_')); 421 } 422 423 private void doTestCollapseWithNoChange(String inout) { 424 /* 425 * Note: assertSame(), not promised by the spec, happens to work with the 426 * current implementation because String.toString() promises to return 427 * |this|. However, GWT bug 4491 keeps it from working there, so we stick 428 * with assertEquals(). 429 */ 430 assertEquals(inout, is('-').collapseFrom(inout, '_')); 431 assertEquals(inout, is('-').or(is('#')).collapseFrom(inout, '_')); 432 assertEquals(inout, isNot('x').collapseFrom(inout, '_')); 433 assertEquals(inout, is('x').negate().collapseFrom(inout, '_')); 434 assertEquals(inout, anyOf("-").collapseFrom(inout, '_')); 435 assertEquals(inout, anyOf("-#").collapseFrom(inout, '_')); 436 assertEquals(inout, anyOf("-#123").collapseFrom(inout, '_')); 437 assertEquals(inout, CharMatcher.NONE.collapseFrom(inout, '_')); 438 } 439 440 public void testCollapse_any() { 441 assertEquals("", CharMatcher.ANY.collapseFrom("", '_')); 442 assertEquals("_", CharMatcher.ANY.collapseFrom("a", '_')); 443 assertEquals("_", CharMatcher.ANY.collapseFrom("ab", '_')); 444 assertEquals("_", CharMatcher.ANY.collapseFrom("abcd", '_')); 445 } 446 447 public void testTrimFrom() { 448 // trimming - 449 doTestTrimFrom("-", ""); 450 doTestTrimFrom("x-", "x"); 451 doTestTrimFrom("-x", "x"); 452 doTestTrimFrom("--", ""); 453 doTestTrimFrom("x--", "x"); 454 doTestTrimFrom("--x", "x"); 455 doTestTrimFrom("-x-", "x"); 456 doTestTrimFrom("x-x", "x-x"); 457 doTestTrimFrom("---", ""); 458 doTestTrimFrom("--x-", "x"); 459 doTestTrimFrom("--xx", "xx"); 460 doTestTrimFrom("-x--", "x"); 461 doTestTrimFrom("-x-x", "x-x"); 462 doTestTrimFrom("-xx-", "xx"); 463 doTestTrimFrom("x--x", "x--x"); 464 doTestTrimFrom("x-x-", "x-x"); 465 doTestTrimFrom("x-xx", "x-xx"); 466 doTestTrimFrom("x-x--xx---x----x", "x-x--xx---x----x"); 467 // additional testing using the doc example 468 assertEquals("cat", anyOf("ab").trimFrom("abacatbab")); 469 } 470 471 private void doTestTrimFrom(String in, String out) { 472 // Try a few different matchers which all match '-' and not 'x' 473 assertEquals(out, is('-').trimFrom(in)); 474 assertEquals(out, is('-').or(is('#')).trimFrom(in)); 475 assertEquals(out, isNot('x').trimFrom(in)); 476 assertEquals(out, is('x').negate().trimFrom(in)); 477 assertEquals(out, anyOf("-").trimFrom(in)); 478 assertEquals(out, anyOf("-#").trimFrom(in)); 479 assertEquals(out, anyOf("-#123").trimFrom(in)); 480 } 481 482 public void testTrimLeadingFrom() { 483 // trimming - 484 doTestTrimLeadingFrom("-", ""); 485 doTestTrimLeadingFrom("x-", "x-"); 486 doTestTrimLeadingFrom("-x", "x"); 487 doTestTrimLeadingFrom("--", ""); 488 doTestTrimLeadingFrom("x--", "x--"); 489 doTestTrimLeadingFrom("--x", "x"); 490 doTestTrimLeadingFrom("-x-", "x-"); 491 doTestTrimLeadingFrom("x-x", "x-x"); 492 doTestTrimLeadingFrom("---", ""); 493 doTestTrimLeadingFrom("--x-", "x-"); 494 doTestTrimLeadingFrom("--xx", "xx"); 495 doTestTrimLeadingFrom("-x--", "x--"); 496 doTestTrimLeadingFrom("-x-x", "x-x"); 497 doTestTrimLeadingFrom("-xx-", "xx-"); 498 doTestTrimLeadingFrom("x--x", "x--x"); 499 doTestTrimLeadingFrom("x-x-", "x-x-"); 500 doTestTrimLeadingFrom("x-xx", "x-xx"); 501 doTestTrimLeadingFrom("x-x--xx---x----x", "x-x--xx---x----x"); 502 // additional testing using the doc example 503 assertEquals("catbab", anyOf("ab").trimLeadingFrom("abacatbab")); 504 } 505 506 private void doTestTrimLeadingFrom(String in, String out) { 507 // Try a few different matchers which all match '-' and not 'x' 508 assertEquals(out, is('-').trimLeadingFrom(in)); 509 assertEquals(out, is('-').or(is('#')).trimLeadingFrom(in)); 510 assertEquals(out, isNot('x').trimLeadingFrom(in)); 511 assertEquals(out, is('x').negate().trimLeadingFrom(in)); 512 assertEquals(out, anyOf("-#").trimLeadingFrom(in)); 513 assertEquals(out, anyOf("-#123").trimLeadingFrom(in)); 514 } 515 516 public void testTrimTrailingFrom() { 517 // trimming - 518 doTestTrimTrailingFrom("-", ""); 519 doTestTrimTrailingFrom("x-", "x"); 520 doTestTrimTrailingFrom("-x", "-x"); 521 doTestTrimTrailingFrom("--", ""); 522 doTestTrimTrailingFrom("x--", "x"); 523 doTestTrimTrailingFrom("--x", "--x"); 524 doTestTrimTrailingFrom("-x-", "-x"); 525 doTestTrimTrailingFrom("x-x", "x-x"); 526 doTestTrimTrailingFrom("---", ""); 527 doTestTrimTrailingFrom("--x-", "--x"); 528 doTestTrimTrailingFrom("--xx", "--xx"); 529 doTestTrimTrailingFrom("-x--", "-x"); 530 doTestTrimTrailingFrom("-x-x", "-x-x"); 531 doTestTrimTrailingFrom("-xx-", "-xx"); 532 doTestTrimTrailingFrom("x--x", "x--x"); 533 doTestTrimTrailingFrom("x-x-", "x-x"); 534 doTestTrimTrailingFrom("x-xx", "x-xx"); 535 doTestTrimTrailingFrom("x-x--xx---x----x", "x-x--xx---x----x"); 536 // additional testing using the doc example 537 assertEquals("abacat", anyOf("ab").trimTrailingFrom("abacatbab")); 538 } 539 540 private void doTestTrimTrailingFrom(String in, String out) { 541 // Try a few different matchers which all match '-' and not 'x' 542 assertEquals(out, is('-').trimTrailingFrom(in)); 543 assertEquals(out, is('-').or(is('#')).trimTrailingFrom(in)); 544 assertEquals(out, isNot('x').trimTrailingFrom(in)); 545 assertEquals(out, is('x').negate().trimTrailingFrom(in)); 546 assertEquals(out, anyOf("-#").trimTrailingFrom(in)); 547 assertEquals(out, anyOf("-#123").trimTrailingFrom(in)); 548 } 549 550 public void testTrimAndCollapse() { 551 // collapsing groups of - into _ 552 doTestTrimAndCollapse("-", ""); 553 doTestTrimAndCollapse("x-", "x"); 554 doTestTrimAndCollapse("-x", "x"); 555 doTestTrimAndCollapse("--", ""); 556 doTestTrimAndCollapse("x--", "x"); 557 doTestTrimAndCollapse("--x", "x"); 558 doTestTrimAndCollapse("-x-", "x"); 559 doTestTrimAndCollapse("x-x", "x_x"); 560 doTestTrimAndCollapse("---", ""); 561 doTestTrimAndCollapse("--x-", "x"); 562 doTestTrimAndCollapse("--xx", "xx"); 563 doTestTrimAndCollapse("-x--", "x"); 564 doTestTrimAndCollapse("-x-x", "x_x"); 565 doTestTrimAndCollapse("-xx-", "xx"); 566 doTestTrimAndCollapse("x--x", "x_x"); 567 doTestTrimAndCollapse("x-x-", "x_x"); 568 doTestTrimAndCollapse("x-xx", "x_xx"); 569 doTestTrimAndCollapse("x-x--xx---x----x", "x_x_xx_x_x"); 570 } 571 572 private void doTestTrimAndCollapse(String in, String out) { 573 // Try a few different matchers which all match '-' and not 'x' 574 assertEquals(out, is('-').trimAndCollapseFrom(in, '_')); 575 assertEquals(out, is('-').or(is('#')).trimAndCollapseFrom(in, '_')); 576 assertEquals(out, isNot('x').trimAndCollapseFrom(in, '_')); 577 assertEquals(out, is('x').negate().trimAndCollapseFrom(in, '_')); 578 assertEquals(out, anyOf("-").trimAndCollapseFrom(in, '_')); 579 assertEquals(out, anyOf("-#").trimAndCollapseFrom(in, '_')); 580 assertEquals(out, anyOf("-#123").trimAndCollapseFrom(in, '_')); 581 } 582 583 public void testReplaceFrom() { 584 assertEquals("yoho", is('a').replaceFrom("yaha", 'o')); 585 assertEquals("yh", is('a').replaceFrom("yaha", "")); 586 assertEquals("yoho", is('a').replaceFrom("yaha", "o")); 587 assertEquals("yoohoo", is('a').replaceFrom("yaha", "oo")); 588 assertEquals("12 > 5", is('>').replaceFrom("12 > 5", ">")); 589 } 590 591 public void testPrecomputedOptimizations() { 592 // These are testing behavior that's never promised by the API. 593 // Some matchers are so efficient that it is a waste of effort to 594 // build a precomputed version. 595 CharMatcher m1 = is('x'); 596 assertSame(m1, m1.precomputed()); 597 598 CharMatcher m2 = anyOf("Az"); 599 assertSame(m2, m2.precomputed()); 600 601 CharMatcher m3 = inRange('A', 'Z'); 602 assertSame(m3, m3.precomputed()); 603 604 assertSame(CharMatcher.NONE, CharMatcher.NONE.precomputed()); 605 assertSame(CharMatcher.ANY, CharMatcher.ANY.precomputed()); 606 } 607 } 608
