David K. Bainbridge | 215e024 | 2017-09-05 23:18:24 -0700 | [diff] [blame] | 1 | // Copyright 2016 The Go Authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style |
| 3 | // license that can be found in the LICENSE file. |
| 4 | |
| 5 | package bidirule |
| 6 | |
| 7 | import ( |
| 8 | "fmt" |
| 9 | "testing" |
| 10 | |
| 11 | "golang.org/x/text/internal/testtext" |
| 12 | "golang.org/x/text/transform" |
| 13 | "golang.org/x/text/unicode/bidi" |
| 14 | ) |
| 15 | |
| 16 | const ( |
| 17 | strL = "ABC" // Left to right - most letters in LTR scripts |
| 18 | strR = "עברית" // Right to left - most letters in non-Arabic RTL scripts |
| 19 | strAL = "دبي" // Arabic letters - most letters in the Arabic script |
| 20 | strEN = "123" // European Number (0-9, and Extended Arabic-Indic numbers) |
| 21 | strES = "+-" // European Number Separator (+ and -) |
| 22 | strET = "$" // European Number Terminator (currency symbols, the hash sign, the percent sign and so on) |
| 23 | strAN = "\u0660" // Arabic Number; this encompasses the Arabic-Indic numbers, but not the Extended Arabic-Indic numbers |
| 24 | strCS = "," // Common Number Separator (. , / : et al) |
| 25 | strNSM = "\u0300" // Nonspacing Mark - most combining accents |
| 26 | strBN = "\u200d" // Boundary Neutral - control characters (ZWNJ, ZWJ, and others) |
| 27 | strB = "\u2029" // Paragraph Separator |
| 28 | strS = "\u0009" // Segment Separator |
| 29 | strWS = " " // Whitespace, including the SPACE character |
| 30 | strON = "@" // Other Neutrals, including @, &, parentheses, MIDDLE DOT |
| 31 | ) |
| 32 | |
| 33 | type ruleTest struct { |
| 34 | in string |
| 35 | dir bidi.Direction |
| 36 | n int // position at which the rule fails |
| 37 | err error |
| 38 | |
| 39 | // For tests that split the string in two. |
| 40 | pSrc int // number of source bytes to consume first |
| 41 | szDst int // size of destination buffer |
| 42 | nSrc int // source bytes consumed and bytes written |
| 43 | err0 error // error after first run |
| 44 | } |
| 45 | |
| 46 | var testCases = [][]ruleTest{ |
| 47 | // Go-specific rules. |
| 48 | // Invalid UTF-8 is invalid. |
| 49 | 0: []ruleTest{{ |
| 50 | in: "", |
| 51 | dir: bidi.LeftToRight, |
| 52 | }, { |
| 53 | in: "\x80", |
| 54 | dir: bidi.LeftToRight, |
| 55 | err: ErrInvalid, |
| 56 | n: 0, |
| 57 | }, { |
| 58 | in: "\xcc", |
| 59 | dir: bidi.LeftToRight, |
| 60 | err: ErrInvalid, |
| 61 | n: 0, |
| 62 | }, { |
| 63 | in: "abc\x80", |
| 64 | dir: bidi.LeftToRight, |
| 65 | err: ErrInvalid, |
| 66 | n: 3, |
| 67 | }, { |
| 68 | in: "abc\xcc", |
| 69 | dir: bidi.LeftToRight, |
| 70 | err: ErrInvalid, |
| 71 | n: 3, |
| 72 | }, { |
| 73 | in: "abc\xccdef", |
| 74 | dir: bidi.LeftToRight, |
| 75 | err: ErrInvalid, |
| 76 | n: 3, |
| 77 | }, { |
| 78 | in: "\xccdef", |
| 79 | dir: bidi.LeftToRight, |
| 80 | err: ErrInvalid, |
| 81 | n: 0, |
| 82 | }, { |
| 83 | in: strR + "\x80", |
| 84 | dir: bidi.RightToLeft, |
| 85 | err: ErrInvalid, |
| 86 | n: len(strR), |
| 87 | }, { |
| 88 | in: strR + "\xcc", |
| 89 | dir: bidi.RightToLeft, |
| 90 | err: ErrInvalid, |
| 91 | n: len(strR), |
| 92 | }, { |
| 93 | in: strAL + "\xcc" + strR, |
| 94 | dir: bidi.RightToLeft, |
| 95 | err: ErrInvalid, |
| 96 | n: len(strAL), |
| 97 | }, { |
| 98 | in: "\xcc" + strR, |
| 99 | dir: bidi.RightToLeft, |
| 100 | err: ErrInvalid, |
| 101 | n: 0, |
| 102 | }}, |
| 103 | |
| 104 | // Rule 2.1: The first character must be a character with Bidi property L, |
| 105 | // R, or AL. If it has the R or AL property, it is an RTL label; if it has |
| 106 | // the L property, it is an LTR label. |
| 107 | 1: []ruleTest{{ |
| 108 | in: strL, |
| 109 | dir: bidi.LeftToRight, |
| 110 | }, { |
| 111 | in: strR, |
| 112 | dir: bidi.RightToLeft, |
| 113 | }, { |
| 114 | in: strAL, |
| 115 | dir: bidi.RightToLeft, |
| 116 | }, { |
| 117 | in: strAN, |
| 118 | dir: bidi.RightToLeft, |
| 119 | err: ErrInvalid, |
| 120 | }, { |
| 121 | in: strEN, |
| 122 | dir: bidi.LeftToRight, |
| 123 | err: ErrInvalid, |
| 124 | n: len(strEN), |
| 125 | }, { |
| 126 | in: strES, |
| 127 | dir: bidi.LeftToRight, |
| 128 | err: ErrInvalid, |
| 129 | n: len(strES), |
| 130 | }, { |
| 131 | in: strET, |
| 132 | dir: bidi.LeftToRight, |
| 133 | err: ErrInvalid, |
| 134 | n: len(strET), |
| 135 | }, { |
| 136 | in: strCS, |
| 137 | dir: bidi.LeftToRight, |
| 138 | err: ErrInvalid, |
| 139 | n: len(strCS), |
| 140 | }, { |
| 141 | in: strNSM, |
| 142 | dir: bidi.LeftToRight, |
| 143 | err: ErrInvalid, |
| 144 | n: len(strNSM), |
| 145 | }, { |
| 146 | in: strBN, |
| 147 | dir: bidi.LeftToRight, |
| 148 | err: ErrInvalid, |
| 149 | n: len(strBN), |
| 150 | }, { |
| 151 | in: strB, |
| 152 | dir: bidi.LeftToRight, |
| 153 | err: ErrInvalid, |
| 154 | n: len(strB), |
| 155 | }, { |
| 156 | in: strS, |
| 157 | dir: bidi.LeftToRight, |
| 158 | err: ErrInvalid, |
| 159 | n: len(strS), |
| 160 | }, { |
| 161 | in: strWS, |
| 162 | dir: bidi.LeftToRight, |
| 163 | err: ErrInvalid, |
| 164 | n: len(strWS), |
| 165 | }, { |
| 166 | in: strON, |
| 167 | dir: bidi.LeftToRight, |
| 168 | err: ErrInvalid, |
| 169 | n: len(strON), |
| 170 | }, { |
| 171 | in: strEN + strR, |
| 172 | dir: bidi.RightToLeft, |
| 173 | err: ErrInvalid, |
| 174 | n: 3, |
| 175 | }, { |
| 176 | in: strES + strR, |
| 177 | dir: bidi.RightToLeft, |
| 178 | err: ErrInvalid, |
| 179 | n: 2, |
| 180 | }, { |
| 181 | in: strET + strR, |
| 182 | dir: bidi.RightToLeft, |
| 183 | err: ErrInvalid, |
| 184 | n: 1, |
| 185 | }, { |
| 186 | in: strCS + strR, |
| 187 | dir: bidi.RightToLeft, |
| 188 | err: ErrInvalid, |
| 189 | n: 1, |
| 190 | }, { |
| 191 | in: strNSM + strR, |
| 192 | dir: bidi.RightToLeft, |
| 193 | err: ErrInvalid, |
| 194 | n: 2, |
| 195 | }, { |
| 196 | in: strBN + strR, |
| 197 | dir: bidi.RightToLeft, |
| 198 | err: ErrInvalid, |
| 199 | n: 3, |
| 200 | }, { |
| 201 | in: strB + strR, |
| 202 | dir: bidi.RightToLeft, |
| 203 | err: ErrInvalid, |
| 204 | n: 3, |
| 205 | }, { |
| 206 | in: strS + strR, |
| 207 | dir: bidi.RightToLeft, |
| 208 | err: ErrInvalid, |
| 209 | n: 1, |
| 210 | }, { |
| 211 | in: strWS + strR, |
| 212 | dir: bidi.RightToLeft, |
| 213 | err: ErrInvalid, |
| 214 | n: 1, |
| 215 | }, { |
| 216 | in: strON + strR, |
| 217 | dir: bidi.RightToLeft, |
| 218 | err: ErrInvalid, |
| 219 | n: 1, |
| 220 | }}, |
| 221 | |
| 222 | // Rule 2.2: In an RTL label, only characters with the Bidi properties R, |
| 223 | // AL, AN, EN, ES, CS, ET, ON, BN, or NSM are allowed. |
| 224 | 2: []ruleTest{{ |
| 225 | in: strR + strR + strAL, |
| 226 | dir: bidi.RightToLeft, |
| 227 | }, { |
| 228 | in: strR + strAL + strR, |
| 229 | dir: bidi.RightToLeft, |
| 230 | }, { |
| 231 | in: strR + strAN + strAL, |
| 232 | dir: bidi.RightToLeft, |
| 233 | }, { |
| 234 | in: strR + strEN + strR, |
| 235 | dir: bidi.RightToLeft, |
| 236 | }, { |
| 237 | in: strR + strES + strR, |
| 238 | dir: bidi.RightToLeft, |
| 239 | }, { |
| 240 | in: strR + strCS + strR, |
| 241 | dir: bidi.RightToLeft, |
| 242 | }, { |
| 243 | in: strR + strET + strAL, |
| 244 | dir: bidi.RightToLeft, |
| 245 | }, { |
| 246 | in: strR + strON + strR, |
| 247 | dir: bidi.RightToLeft, |
| 248 | }, { |
| 249 | in: strR + strBN + strR, |
| 250 | dir: bidi.RightToLeft, |
| 251 | }, { |
| 252 | in: strR + strNSM + strAL, |
| 253 | dir: bidi.RightToLeft, |
| 254 | }, { |
| 255 | in: strR + strL + strR, |
| 256 | dir: bidi.RightToLeft, |
| 257 | n: len(strR), |
| 258 | err: ErrInvalid, |
| 259 | }, { |
| 260 | in: strR + strB + strR, |
| 261 | dir: bidi.RightToLeft, |
| 262 | n: len(strR), |
| 263 | err: ErrInvalid, |
| 264 | }, { |
| 265 | in: strR + strS + strAL, |
| 266 | dir: bidi.RightToLeft, |
| 267 | n: len(strR), |
| 268 | err: ErrInvalid, |
| 269 | }, { |
| 270 | in: strR + strWS + strAL, |
| 271 | dir: bidi.RightToLeft, |
| 272 | n: len(strR), |
| 273 | err: ErrInvalid, |
| 274 | }, { |
| 275 | in: strAL + strR + strAL, |
| 276 | dir: bidi.RightToLeft, |
| 277 | }, { |
| 278 | in: strAL + strAL + strR, |
| 279 | dir: bidi.RightToLeft, |
| 280 | }, { |
| 281 | in: strAL + strAN + strAL, |
| 282 | dir: bidi.RightToLeft, |
| 283 | }, { |
| 284 | in: strAL + strEN + strR, |
| 285 | dir: bidi.RightToLeft, |
| 286 | }, { |
| 287 | in: strAL + strES + strR, |
| 288 | dir: bidi.RightToLeft, |
| 289 | }, { |
| 290 | in: strAL + strCS + strR, |
| 291 | dir: bidi.RightToLeft, |
| 292 | }, { |
| 293 | in: strAL + strET + strAL, |
| 294 | dir: bidi.RightToLeft, |
| 295 | }, { |
| 296 | in: strAL + strON + strR, |
| 297 | dir: bidi.RightToLeft, |
| 298 | }, { |
| 299 | in: strAL + strBN + strR, |
| 300 | dir: bidi.RightToLeft, |
| 301 | }, { |
| 302 | in: strAL + strNSM + strAL, |
| 303 | dir: bidi.RightToLeft, |
| 304 | }, { |
| 305 | in: strAL + strL + strR, |
| 306 | dir: bidi.RightToLeft, |
| 307 | n: len(strAL), |
| 308 | err: ErrInvalid, |
| 309 | }, { |
| 310 | in: strAL + strB + strR, |
| 311 | dir: bidi.RightToLeft, |
| 312 | n: len(strAL), |
| 313 | err: ErrInvalid, |
| 314 | }, { |
| 315 | in: strAL + strS + strAL, |
| 316 | dir: bidi.RightToLeft, |
| 317 | n: len(strAL), |
| 318 | err: ErrInvalid, |
| 319 | }, { |
| 320 | in: strAL + strWS + strAL, |
| 321 | dir: bidi.RightToLeft, |
| 322 | n: len(strAL), |
| 323 | err: ErrInvalid, |
| 324 | }}, |
| 325 | |
| 326 | // Rule 2.3: In an RTL label, the end of the label must be a character with |
| 327 | // Bidi property R, AL, EN, or AN, followed by zero or more characters with |
| 328 | // Bidi property NSM. |
| 329 | 3: []ruleTest{{ |
| 330 | in: strR + strNSM, |
| 331 | dir: bidi.RightToLeft, |
| 332 | }, { |
| 333 | in: strR + strR, |
| 334 | dir: bidi.RightToLeft, |
| 335 | }, { |
| 336 | in: strR + strAL + strNSM, |
| 337 | dir: bidi.RightToLeft, |
| 338 | }, { |
| 339 | in: strR + strEN + strNSM + strNSM, |
| 340 | dir: bidi.RightToLeft, |
| 341 | }, { |
| 342 | in: strR + strAN, |
| 343 | dir: bidi.RightToLeft, |
| 344 | }, { |
| 345 | in: strR + strES + strNSM, |
| 346 | dir: bidi.RightToLeft, |
| 347 | n: len(strR + strES + strNSM), |
| 348 | err: ErrInvalid, |
| 349 | }, { |
| 350 | in: strR + strCS + strNSM + strNSM, |
| 351 | dir: bidi.RightToLeft, |
| 352 | n: len(strR + strCS + strNSM + strNSM), |
| 353 | err: ErrInvalid, |
| 354 | }, { |
| 355 | in: strR + strET, |
| 356 | dir: bidi.RightToLeft, |
| 357 | n: len(strR + strET), |
| 358 | err: ErrInvalid, |
| 359 | }, { |
| 360 | in: strR + strON + strNSM, |
| 361 | dir: bidi.RightToLeft, |
| 362 | n: len(strR + strON + strNSM), |
| 363 | err: ErrInvalid, |
| 364 | }, { |
| 365 | in: strR + strBN + strNSM + strNSM, |
| 366 | dir: bidi.RightToLeft, |
| 367 | n: len(strR + strBN + strNSM + strNSM), |
| 368 | err: ErrInvalid, |
| 369 | }, { |
| 370 | in: strR + strL + strNSM, |
| 371 | dir: bidi.RightToLeft, |
| 372 | n: len(strR), |
| 373 | err: ErrInvalid, |
| 374 | }, { |
| 375 | in: strR + strB + strNSM + strNSM, |
| 376 | dir: bidi.RightToLeft, |
| 377 | n: len(strR), |
| 378 | err: ErrInvalid, |
| 379 | }, { |
| 380 | in: strR + strS, |
| 381 | dir: bidi.RightToLeft, |
| 382 | n: len(strR), |
| 383 | err: ErrInvalid, |
| 384 | }, { |
| 385 | in: strR + strWS, |
| 386 | dir: bidi.RightToLeft, |
| 387 | n: len(strR), |
| 388 | err: ErrInvalid, |
| 389 | }, { |
| 390 | in: strAL + strNSM, |
| 391 | dir: bidi.RightToLeft, |
| 392 | }, { |
| 393 | in: strAL + strR, |
| 394 | dir: bidi.RightToLeft, |
| 395 | }, { |
| 396 | in: strAL + strAL + strNSM, |
| 397 | dir: bidi.RightToLeft, |
| 398 | }, { |
| 399 | in: strAL + strEN + strNSM + strNSM, |
| 400 | dir: bidi.RightToLeft, |
| 401 | }, { |
| 402 | in: strAL + strAN, |
| 403 | dir: bidi.RightToLeft, |
| 404 | }, { |
| 405 | in: strAL + strES + strNSM, |
| 406 | dir: bidi.RightToLeft, |
| 407 | n: len(strAL + strES + strNSM), |
| 408 | err: ErrInvalid, |
| 409 | }, { |
| 410 | in: strAL + strCS + strNSM + strNSM, |
| 411 | dir: bidi.RightToLeft, |
| 412 | n: len(strAL + strCS + strNSM + strNSM), |
| 413 | err: ErrInvalid, |
| 414 | }, { |
| 415 | in: strAL + strET, |
| 416 | dir: bidi.RightToLeft, |
| 417 | n: len(strAL + strET), |
| 418 | err: ErrInvalid, |
| 419 | }, { |
| 420 | in: strAL + strON + strNSM, |
| 421 | dir: bidi.RightToLeft, |
| 422 | n: len(strAL + strON + strNSM), |
| 423 | err: ErrInvalid, |
| 424 | }, { |
| 425 | in: strAL + strBN + strNSM + strNSM, |
| 426 | dir: bidi.RightToLeft, |
| 427 | n: len(strAL + strBN + strNSM + strNSM), |
| 428 | err: ErrInvalid, |
| 429 | }, { |
| 430 | in: strAL + strL + strNSM, |
| 431 | dir: bidi.RightToLeft, |
| 432 | n: len(strAL), |
| 433 | err: ErrInvalid, |
| 434 | }, { |
| 435 | in: strAL + strB + strNSM + strNSM, |
| 436 | dir: bidi.RightToLeft, |
| 437 | n: len(strAL), |
| 438 | err: ErrInvalid, |
| 439 | }, { |
| 440 | in: strAL + strS, |
| 441 | dir: bidi.RightToLeft, |
| 442 | n: len(strAL), |
| 443 | err: ErrInvalid, |
| 444 | }, { |
| 445 | in: strAL + strWS, |
| 446 | dir: bidi.RightToLeft, |
| 447 | n: len(strAL), |
| 448 | err: ErrInvalid, |
| 449 | }}, |
| 450 | |
| 451 | // Rule 2.4: In an RTL label, if an EN is present, no AN may be present, |
| 452 | // and vice versa. |
| 453 | 4: []ruleTest{{ |
| 454 | in: strR + strEN + strAN, |
| 455 | dir: bidi.RightToLeft, |
| 456 | n: len(strR + strEN), |
| 457 | err: ErrInvalid, |
| 458 | }, { |
| 459 | in: strR + strAN + strEN + strNSM, |
| 460 | dir: bidi.RightToLeft, |
| 461 | n: len(strR + strAN), |
| 462 | err: ErrInvalid, |
| 463 | }, { |
| 464 | in: strAL + strEN + strAN, |
| 465 | dir: bidi.RightToLeft, |
| 466 | n: len(strAL + strEN), |
| 467 | err: ErrInvalid, |
| 468 | }, { |
| 469 | in: strAL + strAN + strEN + strNSM, |
| 470 | dir: bidi.RightToLeft, |
| 471 | n: len(strAL + strAN), |
| 472 | err: ErrInvalid, |
| 473 | }}, |
| 474 | |
| 475 | // Rule 2.5: In an LTR label, only characters with the Bidi properties L, |
| 476 | // EN, ES, CS, ET, ON, BN, or NSM are allowed. |
| 477 | 5: []ruleTest{{ |
| 478 | in: strL + strL + strL, |
| 479 | dir: bidi.LeftToRight, |
| 480 | }, { |
| 481 | in: strL + strEN + strL, |
| 482 | dir: bidi.LeftToRight, |
| 483 | }, { |
| 484 | in: strL + strES + strL, |
| 485 | dir: bidi.LeftToRight, |
| 486 | }, { |
| 487 | in: strL + strCS + strL, |
| 488 | dir: bidi.LeftToRight, |
| 489 | }, { |
| 490 | in: strL + strET + strL, |
| 491 | dir: bidi.LeftToRight, |
| 492 | }, { |
| 493 | in: strL + strON + strL, |
| 494 | dir: bidi.LeftToRight, |
| 495 | }, { |
| 496 | in: strL + strBN + strL, |
| 497 | dir: bidi.LeftToRight, |
| 498 | }, { |
| 499 | in: strL + strNSM + strL, |
| 500 | dir: bidi.LeftToRight, |
| 501 | }, { |
| 502 | in: strL + strR + strL, |
| 503 | dir: bidi.RightToLeft, |
| 504 | n: len(strL), |
| 505 | err: ErrInvalid, |
| 506 | }, { |
| 507 | in: strL + strAL + strL, |
| 508 | dir: bidi.RightToLeft, |
| 509 | n: len(strL), |
| 510 | err: ErrInvalid, |
| 511 | }, { |
| 512 | in: strL + strAN + strL, |
| 513 | dir: bidi.RightToLeft, |
| 514 | n: len(strL), |
| 515 | err: ErrInvalid, |
| 516 | }, { |
| 517 | in: strL + strB + strL, |
| 518 | dir: bidi.LeftToRight, |
| 519 | n: len(strL + strB + strL), |
| 520 | err: ErrInvalid, |
| 521 | }, { |
| 522 | in: strL + strB + strL + strR, |
| 523 | dir: bidi.RightToLeft, |
| 524 | n: len(strL + strB + strL), |
| 525 | err: ErrInvalid, |
| 526 | }, { |
| 527 | in: strL + strS + strL, |
| 528 | dir: bidi.LeftToRight, |
| 529 | n: len(strL + strS + strL), |
| 530 | err: ErrInvalid, |
| 531 | }, { |
| 532 | in: strL + strS + strL + strR, |
| 533 | dir: bidi.RightToLeft, |
| 534 | n: len(strL + strS + strL), |
| 535 | err: ErrInvalid, |
| 536 | }, { |
| 537 | in: strL + strWS + strL, |
| 538 | dir: bidi.LeftToRight, |
| 539 | n: len(strL + strWS + strL), |
| 540 | err: ErrInvalid, |
| 541 | }, { |
| 542 | in: strL + strWS + strL + strR, |
| 543 | dir: bidi.RightToLeft, |
| 544 | n: len(strL + strWS + strL), |
| 545 | err: ErrInvalid, |
| 546 | }}, |
| 547 | |
| 548 | // Rule 2.6: In an LTR label, the end of the label must be a character with |
| 549 | // Bidi property L or EN, followed by zero or more characters with Bidi |
| 550 | // property NSM. |
| 551 | 6: []ruleTest{{ |
| 552 | in: strL, |
| 553 | dir: bidi.LeftToRight, |
| 554 | }, { |
| 555 | in: strL + strNSM, |
| 556 | dir: bidi.LeftToRight, |
| 557 | }, { |
| 558 | in: strL + strNSM + strNSM, |
| 559 | dir: bidi.LeftToRight, |
| 560 | }, { |
| 561 | in: strL + strEN, |
| 562 | dir: bidi.LeftToRight, |
| 563 | }, { |
| 564 | in: strL + strEN + strNSM, |
| 565 | dir: bidi.LeftToRight, |
| 566 | }, { |
| 567 | in: strL + strEN + strNSM + strNSM, |
| 568 | dir: bidi.LeftToRight, |
| 569 | }, { |
| 570 | in: strL + strES, |
| 571 | dir: bidi.LeftToRight, |
| 572 | n: len(strL + strES), |
| 573 | err: ErrInvalid, |
| 574 | }, { |
| 575 | in: strL + strES + strR, |
| 576 | dir: bidi.RightToLeft, |
| 577 | n: len(strL + strES), |
| 578 | err: ErrInvalid, |
| 579 | }, { |
| 580 | in: strL + strCS, |
| 581 | dir: bidi.LeftToRight, |
| 582 | n: len(strL + strCS), |
| 583 | err: ErrInvalid, |
| 584 | }, { |
| 585 | in: strL + strCS + strR, |
| 586 | dir: bidi.RightToLeft, |
| 587 | n: len(strL + strCS), |
| 588 | err: ErrInvalid, |
| 589 | }, { |
| 590 | in: strL + strET, |
| 591 | dir: bidi.LeftToRight, |
| 592 | n: len(strL + strET), |
| 593 | err: ErrInvalid, |
| 594 | }, { |
| 595 | in: strL + strET + strR, |
| 596 | dir: bidi.RightToLeft, |
| 597 | n: len(strL + strET), |
| 598 | err: ErrInvalid, |
| 599 | }, { |
| 600 | in: strL + strON, |
| 601 | dir: bidi.LeftToRight, |
| 602 | n: len(strL + strON), |
| 603 | err: ErrInvalid, |
| 604 | }, { |
| 605 | in: strL + strON + strR, |
| 606 | dir: bidi.RightToLeft, |
| 607 | n: len(strL + strON), |
| 608 | err: ErrInvalid, |
| 609 | }, { |
| 610 | in: strL + strBN, |
| 611 | dir: bidi.LeftToRight, |
| 612 | n: len(strL + strBN), |
| 613 | err: ErrInvalid, |
| 614 | }, { |
| 615 | in: strL + strBN + strR, |
| 616 | dir: bidi.RightToLeft, |
| 617 | n: len(strL + strBN), |
| 618 | err: ErrInvalid, |
| 619 | }, { |
| 620 | in: strL + strR, |
| 621 | dir: bidi.RightToLeft, |
| 622 | n: len(strL), |
| 623 | err: ErrInvalid, |
| 624 | }, { |
| 625 | in: strL + strAL, |
| 626 | dir: bidi.RightToLeft, |
| 627 | n: len(strL), |
| 628 | err: ErrInvalid, |
| 629 | }, { |
| 630 | in: strL + strAN, |
| 631 | dir: bidi.RightToLeft, |
| 632 | n: len(strL), |
| 633 | err: ErrInvalid, |
| 634 | }, { |
| 635 | in: strL + strB, |
| 636 | dir: bidi.LeftToRight, |
| 637 | n: len(strL + strB), |
| 638 | err: ErrInvalid, |
| 639 | }, { |
| 640 | in: strL + strB + strR, |
| 641 | dir: bidi.RightToLeft, |
| 642 | n: len(strL + strB), |
| 643 | err: ErrInvalid, |
| 644 | }, { |
| 645 | in: strL + strS, |
| 646 | dir: bidi.LeftToRight, |
| 647 | n: len(strL + strS), |
| 648 | err: ErrInvalid, |
| 649 | }, { |
| 650 | in: strL + strS + strR, |
| 651 | dir: bidi.RightToLeft, |
| 652 | n: len(strL + strS), |
| 653 | err: ErrInvalid, |
| 654 | }, { |
| 655 | in: strL + strWS, |
| 656 | dir: bidi.LeftToRight, |
| 657 | n: len(strL + strWS), |
| 658 | err: ErrInvalid, |
| 659 | }, { |
| 660 | in: strL + strWS + strR, |
| 661 | dir: bidi.RightToLeft, |
| 662 | n: len(strL + strWS), |
| 663 | err: ErrInvalid, |
| 664 | }}, |
| 665 | |
| 666 | // Incremental processing. |
| 667 | 9: []ruleTest{{ |
| 668 | in: "e\u0301", // é |
| 669 | dir: bidi.LeftToRight, |
| 670 | |
| 671 | pSrc: 2, |
| 672 | nSrc: 1, |
| 673 | err0: transform.ErrShortSrc, |
| 674 | }, { |
| 675 | in: "e\u1000f", // é |
| 676 | dir: bidi.LeftToRight, |
| 677 | |
| 678 | pSrc: 3, |
| 679 | nSrc: 1, |
| 680 | err0: transform.ErrShortSrc, |
| 681 | }, { |
| 682 | // Remain invalid once invalid. |
| 683 | in: strR + "ab", |
| 684 | dir: bidi.RightToLeft, |
| 685 | n: len(strR), |
| 686 | err: ErrInvalid, |
| 687 | |
| 688 | pSrc: len(strR) + 1, |
| 689 | nSrc: len(strR), |
| 690 | err0: ErrInvalid, |
| 691 | }, { |
| 692 | // Short destination |
| 693 | in: "abcdefghij", |
| 694 | dir: bidi.LeftToRight, |
| 695 | |
| 696 | pSrc: 10, |
| 697 | szDst: 5, |
| 698 | nSrc: 5, |
| 699 | err0: transform.ErrShortDst, |
| 700 | }, { |
| 701 | in: "\U000102f7", |
| 702 | dir: bidi.LeftToRight, |
| 703 | n: len("\U000102f7"), |
| 704 | err: ErrInvalid, |
| 705 | }, { |
| 706 | // Short destination splitting input rune |
| 707 | in: "e\u0301", |
| 708 | dir: bidi.LeftToRight, |
| 709 | |
| 710 | pSrc: 3, |
| 711 | szDst: 2, |
| 712 | nSrc: 1, |
| 713 | err0: transform.ErrShortDst, |
| 714 | }, { |
| 715 | // Unicode 10.0.0 IDNA test string. |
| 716 | in: "FAX\u2a77\U0001d186", |
| 717 | dir: bidi.LeftToRight, |
| 718 | n: len("FAX\u2a77\U0001d186"), |
| 719 | err: ErrInvalid, |
| 720 | }, { |
| 721 | in: "\x80\u0660", |
| 722 | dir: bidi.RightToLeft, |
| 723 | n: 0, |
| 724 | err: ErrInvalid, |
| 725 | }}, |
| 726 | } |
| 727 | |
| 728 | func init() { |
| 729 | for rule, cases := range testCases { |
| 730 | for i, tc := range cases { |
| 731 | if tc.err == nil { |
| 732 | testCases[rule][i].n = len(tc.in) |
| 733 | } |
| 734 | } |
| 735 | } |
| 736 | } |
| 737 | |
| 738 | func doTests(t *testing.T, fn func(t *testing.T, tc ruleTest)) { |
| 739 | for rule, cases := range testCases { |
| 740 | for i, tc := range cases { |
| 741 | name := fmt.Sprintf("%d/%d:%+q:%s", rule, i, tc.in, tc.in) |
| 742 | testtext.Run(t, name, func(t *testing.T) { |
| 743 | fn(t, tc) |
| 744 | }) |
| 745 | } |
| 746 | } |
| 747 | } |
| 748 | |
| 749 | func TestDirection(t *testing.T) { |
| 750 | doTests(t, func(t *testing.T, tc ruleTest) { |
| 751 | dir := Direction([]byte(tc.in)) |
| 752 | if dir != tc.dir { |
| 753 | t.Errorf("dir was %v; want %v", dir, tc.dir) |
| 754 | } |
| 755 | }) |
| 756 | } |
| 757 | |
| 758 | func TestDirectionString(t *testing.T) { |
| 759 | doTests(t, func(t *testing.T, tc ruleTest) { |
| 760 | dir := DirectionString(tc.in) |
| 761 | if dir != tc.dir { |
| 762 | t.Errorf("dir was %v; want %v", dir, tc.dir) |
| 763 | } |
| 764 | }) |
| 765 | } |
| 766 | |
| 767 | func TestValid(t *testing.T) { |
| 768 | doTests(t, func(t *testing.T, tc ruleTest) { |
| 769 | got := Valid([]byte(tc.in)) |
| 770 | want := tc.err == nil |
| 771 | if got != want { |
| 772 | t.Fatalf("Valid: got %v; want %v", got, want) |
| 773 | } |
| 774 | |
| 775 | got = ValidString(tc.in) |
| 776 | want = tc.err == nil |
| 777 | if got != want { |
| 778 | t.Fatalf("Valid: got %v; want %v", got, want) |
| 779 | } |
| 780 | }) |
| 781 | } |
| 782 | |
| 783 | func TestSpan(t *testing.T) { |
| 784 | doTests(t, func(t *testing.T, tc ruleTest) { |
| 785 | // Skip tests that test for limited destination buffer size. |
| 786 | if tc.szDst > 0 { |
| 787 | return |
| 788 | } |
| 789 | |
| 790 | r := New() |
| 791 | src := []byte(tc.in) |
| 792 | |
| 793 | n, err := r.Span(src[:tc.pSrc], tc.pSrc == len(tc.in)) |
| 794 | if err != tc.err0 { |
| 795 | t.Errorf("err0 was %v; want %v", err, tc.err0) |
| 796 | } |
| 797 | if n != tc.nSrc { |
| 798 | t.Fatalf("nSrc was %d; want %d", n, tc.nSrc) |
| 799 | } |
| 800 | |
| 801 | n, err = r.Span(src[n:], true) |
| 802 | if err != tc.err { |
| 803 | t.Errorf("error was %v; want %v", err, tc.err) |
| 804 | } |
| 805 | if got := n + tc.nSrc; got != tc.n { |
| 806 | t.Errorf("n was %d; want %d", got, tc.n) |
| 807 | } |
| 808 | }) |
| 809 | } |
| 810 | |
| 811 | func TestTransform(t *testing.T) { |
| 812 | doTests(t, func(t *testing.T, tc ruleTest) { |
| 813 | r := New() |
| 814 | |
| 815 | src := []byte(tc.in) |
| 816 | dst := make([]byte, len(tc.in)) |
| 817 | if tc.szDst > 0 { |
| 818 | dst = make([]byte, tc.szDst) |
| 819 | } |
| 820 | |
| 821 | // First transform operates on a zero-length string for most tests. |
| 822 | nDst, nSrc, err := r.Transform(dst, src[:tc.pSrc], tc.pSrc == len(tc.in)) |
| 823 | if err != tc.err0 { |
| 824 | t.Errorf("err0 was %v; want %v", err, tc.err0) |
| 825 | } |
| 826 | if nDst != nSrc { |
| 827 | t.Fatalf("nDst (%d) and nSrc (%d) should match", nDst, nSrc) |
| 828 | } |
| 829 | if nSrc != tc.nSrc { |
| 830 | t.Fatalf("nSrc was %d; want %d", nSrc, tc.nSrc) |
| 831 | } |
| 832 | |
| 833 | dst1 := make([]byte, len(tc.in)) |
| 834 | copy(dst1, dst[:nDst]) |
| 835 | |
| 836 | nDst, nSrc, err = r.Transform(dst1[nDst:], src[nSrc:], true) |
| 837 | if err != tc.err { |
| 838 | t.Errorf("error was %v; want %v", err, tc.err) |
| 839 | } |
| 840 | if nDst != nSrc { |
| 841 | t.Fatalf("nDst (%d) and nSrc (%d) should match", nDst, nSrc) |
| 842 | } |
| 843 | n := nSrc + tc.nSrc |
| 844 | if n != tc.n { |
| 845 | t.Fatalf("n was %d; want %d", n, tc.n) |
| 846 | } |
| 847 | if got, want := string(dst1[:n]), tc.in[:tc.n]; got != want { |
| 848 | t.Errorf("got %+q; want %+q", got, want) |
| 849 | } |
| 850 | }) |
| 851 | } |