llvm/unittests/Support/UnicodeTest.cpp

   1 //===- unittests/Support/UnicodeTest.cpp - Unicode.h tests ----------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #include "llvm/Support/Unicode.h"
  10 #include "llvm/ADT/StringExtras.h"
  11 #include "llvm/ADT/edit_distance.h"
  12 #include "llvm/Support/ConvertUTF.h"
  13 #include "gmock/gmock.h"
  14 #include "gtest/gtest.h"
  15
  16 namespace llvm {
  17 namespace sys {
  18 namespace unicode {
  19 namespace {
  20
  21 TEST(Unicode, columnWidthUTF8) {
  22   EXPECT_EQ(0, columnWidthUTF8(""));
  23   EXPECT_EQ(1, columnWidthUTF8(" "));
  24   EXPECT_EQ(1, columnWidthUTF8("a"));
  25   EXPECT_EQ(1, columnWidthUTF8("~"));
  26
  27   EXPECT_EQ(6, columnWidthUTF8("abcdef"));
  28
  29   EXPECT_EQ(-1, columnWidthUTF8("\x01"));
  30   EXPECT_EQ(-1, columnWidthUTF8("\t"));
  31   EXPECT_EQ(-1, columnWidthUTF8("aaaaaaaaaa\x01"));
  32   EXPECT_EQ(-1, columnWidthUTF8("\342\200\213")); // 200B ZERO WIDTH SPACE
  33
  34   // 00AD SOFT HYPHEN is displayed on most terminals as a space or a dash. Some
  35   // text editors display it only when a line is broken at it, some use it as a
  36   // line-break hint, but don't display. We choose terminal-oriented
  37   // interpretation.
  38   EXPECT_EQ(1, columnWidthUTF8("\302\255"));
  39
  40   EXPECT_EQ(0, columnWidthUTF8("\314\200"));     // 0300 COMBINING GRAVE ACCENT
  41   EXPECT_EQ(1, columnWidthUTF8("\340\270\201")); // 0E01 THAI CHARACTER KO KAI
  42   EXPECT_EQ(2, columnWidthUTF8("\344\270\200")); // CJK UNIFIED IDEOGRAPH-4E00
  43
  44   EXPECT_EQ(4, columnWidthUTF8("\344\270\200\344\270\200"));
  45   EXPECT_EQ(3, columnWidthUTF8("q\344\270\200"));
  46   EXPECT_EQ(3, columnWidthUTF8("\314\200\340\270\201\344\270\200"));
  47
  48   EXPECT_EQ(2, columnWidthUTF8("\342\214\232")); // U+231A WATCH (emoji)
  49   EXPECT_EQ(2, columnWidthUTF8("\360\237\253\233")); // U+1FADB PEA POD (Unicode 15 emoji)
  50   EXPECT_EQ(2, columnWidthUTF8("\360\233\204\262")); // U+1B132 HIRAGANA LETTER SMALL KO
  51   EXPECT_EQ(2, columnWidthUTF8("\360\227\201\202")); // U+17042 TANGUT IDEOGRAPH
  52
  53   // Invalid UTF-8 strings, columnWidthUTF8 should error out.
  54   EXPECT_EQ(-2, columnWidthUTF8("\344"));
  55   EXPECT_EQ(-2, columnWidthUTF8("\344\270"));
  56   EXPECT_EQ(-2, columnWidthUTF8("\344\270\033"));
  57   EXPECT_EQ(-2, columnWidthUTF8("\344\270\300"));
  58   EXPECT_EQ(-2, columnWidthUTF8("\377\366\355"));
  59
  60   EXPECT_EQ(-2, columnWidthUTF8("qwer\344"));
  61   EXPECT_EQ(-2, columnWidthUTF8("qwer\344\270"));
  62   EXPECT_EQ(-2, columnWidthUTF8("qwer\344\270\033"));
  63   EXPECT_EQ(-2, columnWidthUTF8("qwer\344\270\300"));
  64   EXPECT_EQ(-2, columnWidthUTF8("qwer\377\366\355"));
  65
  66   // UTF-8 sequences longer than 4 bytes correspond to unallocated Unicode
  67   // characters.
  68   EXPECT_EQ(-2, columnWidthUTF8("\370\200\200\200\200"));     // U+200000
  69   EXPECT_EQ(-2, columnWidthUTF8("\374\200\200\200\200\200")); // U+4000000
  70 }
  71
  72 TEST(Unicode, isPrintable) {
  73   EXPECT_FALSE(isPrintable(0)); // <control-0000>-<control-001F>
  74   EXPECT_FALSE(isPrintable(0x01));
  75   EXPECT_FALSE(isPrintable(0x1F));
  76   EXPECT_TRUE(isPrintable(' '));
  77   EXPECT_TRUE(isPrintable('A'));
  78   EXPECT_TRUE(isPrintable('~'));
  79   EXPECT_FALSE(isPrintable(0x7F)); // <control-007F>..<control-009F>
  80   EXPECT_FALSE(isPrintable(0x90));
  81   EXPECT_FALSE(isPrintable(0x9F));
  82
  83   EXPECT_TRUE(isPrintable(0xAC));
  84   EXPECT_TRUE(isPrintable(0xAD)); // SOFT HYPHEN is displayed on most terminals
  85                                   // as either a space or a dash.
  86   EXPECT_TRUE(isPrintable(0xAE));
  87
  88   EXPECT_TRUE(isPrintable(0x0377));  // GREEK SMALL LETTER PAMPHYLIAN DIGAMMA
  89   EXPECT_FALSE(isPrintable(0x0378)); // <reserved-0378>..<reserved-0379>
  90
  91   EXPECT_FALSE(isPrintable(0x0600)); // ARABIC NUMBER SIGN
  92
  93   EXPECT_FALSE(isPrintable(0x1FFFF)); // <reserved-1F774>..<noncharacter-1FFFF>
  94   EXPECT_TRUE(isPrintable(0x20000));  // CJK UNIFIED IDEOGRAPH-20000
  95
  96   EXPECT_FALSE(isPrintable(0x10FFFF)); // noncharacter
  97
  98   // test the validity of a fast path in columnWidthUTF8
  99   for (unsigned char c = 0; c < 128; ++c) {
 100     const UTF8 buf8[2] = {c, 0};
 101     const UTF8 *Target8 = &buf8[0];
 102     UTF32 buf32[1];
 103     UTF32 *Target32 = &buf32[0];
 104     auto status = ConvertUTF8toUTF32(&Target8, Target8 + 1, &Target32,
 105                                      Target32 + 1, strictConversion);
 106     EXPECT_EQ(status, conversionOK);
 107     EXPECT_EQ((columnWidthUTF8(reinterpret_cast<const char *>(buf8)) == 1),
 108               (bool)isPrintable(buf32[0]));
 109   }
 110 }
 111
 112 TEST(Unicode, nameToCodepointStrict) {
 113   auto map = [](StringRef Str) {
 114     return nameToCodepointStrict(Str).value_or(0xFFFF'FFFF);
 115   };
 116
 117   // generated codepoints
 118   EXPECT_EQ(0x03400u, map("CJK UNIFIED IDEOGRAPH-3400"));
 119   EXPECT_EQ(0x04DBFu, map("CJK UNIFIED IDEOGRAPH-4DBF"));
 120   EXPECT_EQ(0x04E00u, map("CJK UNIFIED IDEOGRAPH-4E00"));
 121   EXPECT_EQ(0x09FFCu, map("CJK UNIFIED IDEOGRAPH-9FFC"));
 122   EXPECT_EQ(0x20000u, map("CJK UNIFIED IDEOGRAPH-20000"));
 123   EXPECT_EQ(0x2A6DDu, map("CJK UNIFIED IDEOGRAPH-2A6DD"));
 124   EXPECT_EQ(0x2A700u, map("CJK UNIFIED IDEOGRAPH-2A700"));
 125   EXPECT_EQ(0x2B740u, map("CJK UNIFIED IDEOGRAPH-2B740"));
 126   EXPECT_EQ(0x2B81Du, map("CJK UNIFIED IDEOGRAPH-2B81D"));
 127   EXPECT_EQ(0x2B820u, map("CJK UNIFIED IDEOGRAPH-2B820"));
 128   EXPECT_EQ(0x2CEA1u, map("CJK UNIFIED IDEOGRAPH-2CEA1"));
 129   EXPECT_EQ(0x2CEB0u, map("CJK UNIFIED IDEOGRAPH-2CEB0"));
 130   EXPECT_EQ(0x2EBE0u, map("CJK UNIFIED IDEOGRAPH-2EBE0"));
 131   EXPECT_EQ(0x30000u, map("CJK UNIFIED IDEOGRAPH-30000"));
 132   EXPECT_EQ(0x3134Au, map("CJK UNIFIED IDEOGRAPH-3134A"));
 133   EXPECT_EQ(0x17000u, map("TANGUT IDEOGRAPH-17000"));
 134   EXPECT_EQ(0x187F7u, map("TANGUT IDEOGRAPH-187F7"));
 135   EXPECT_EQ(0x18D00u, map("TANGUT IDEOGRAPH-18D00"));
 136   EXPECT_EQ(0x18D08u, map("TANGUT IDEOGRAPH-18D08"));
 137   EXPECT_EQ(0x18B00u, map("KHITAN SMALL SCRIPT CHARACTER-18B00"));
 138   EXPECT_EQ(0x18CD5u, map("KHITAN SMALL SCRIPT CHARACTER-18CD5"));
 139   EXPECT_EQ(0x1B170u, map("NUSHU CHARACTER-1B170"));
 140   EXPECT_EQ(0x1B2FBu, map("NUSHU CHARACTER-1B2FB"));
 141   EXPECT_EQ(0x0F900u, map("CJK COMPATIBILITY IDEOGRAPH-F900"));
 142   EXPECT_EQ(0x0FA6Du, map("CJK COMPATIBILITY IDEOGRAPH-FA6D"));
 143   EXPECT_EQ(0x0FA70u, map("CJK COMPATIBILITY IDEOGRAPH-FA70"));
 144   EXPECT_EQ(0x0FAD9u, map("CJK COMPATIBILITY IDEOGRAPH-FAD9"));
 145   EXPECT_EQ(0x2F800u, map("CJK COMPATIBILITY IDEOGRAPH-2F800"));
 146   EXPECT_EQ(0x2FA1Du, map("CJK COMPATIBILITY IDEOGRAPH-2FA1D"));
 147   EXPECT_EQ(0x31350u, map("CJK UNIFIED IDEOGRAPH-31350")); // Unicode 15.0
 148   EXPECT_EQ(0x2EBF0u, map("CJK UNIFIED IDEOGRAPH-2EBF0")); // Unicode 15.1
 149
 150   EXPECT_EQ(0xAC00u, map("HANGUL SYLLABLE GA"));
 151   EXPECT_EQ(0xAC14u, map("HANGUL SYLLABLE GASS"));
 152   EXPECT_EQ(0xAC2Bu, map("HANGUL SYLLABLE GAELH"));
 153   EXPECT_EQ(0xAC7Bu, map("HANGUL SYLLABLE GEOLB"));
 154   EXPECT_EQ(0xC640u, map("HANGUL SYLLABLE WA"));
 155   EXPECT_EQ(0xC544u, map("HANGUL SYLLABLE A"));
 156   EXPECT_EQ(0xC5D0u, map("HANGUL SYLLABLE E"));
 157   EXPECT_EQ(0xC774u, map("HANGUL SYLLABLE I"));
 158
 159   EXPECT_EQ(0x1F984u, map("UNICORN FACE"));
 160   EXPECT_EQ(0x00640u, map("ARABIC TATWEEL"));
 161   EXPECT_EQ(0x02C05u, map("GLAGOLITIC CAPITAL LETTER YESTU"));
 162   EXPECT_EQ(0x13000u, map("EGYPTIAN HIEROGLYPH A001"));
 163   EXPECT_EQ(0x02235u, map("BECAUSE"));
 164   EXPECT_EQ(0x1F514u, map("BELL"));
 165   EXPECT_EQ(0x1F9A9u, map("FLAMINGO"));
 166   EXPECT_EQ(0x1F9A9u, map("FLAMINGO"));
 167   EXPECT_EQ(0x1F402u, map("OX")); // 2 characters
 168   EXPECT_EQ(0x0FBF9u, map("ARABIC LIGATURE UIGHUR KIRGHIZ YEH WITH HAMZA "
 169                           "ABOVE WITH ALEF MAKSURA ISOLATED FORM"));
 170   EXPECT_EQ(0x11F04u, map("KAWI LETTER A")); // Unicode 15.0
 171   EXPECT_EQ(0x1FA77u, map("PINK HEART")); // Unicode 15.0
 172   EXPECT_EQ(0x2FFFu,
 173             map("IDEOGRAPHIC DESCRIPTION CHARACTER ROTATION")); // Unicode 15.1
 174
 175   // Aliases
 176   EXPECT_EQ(0x0000u, map("NULL"));
 177   EXPECT_EQ(0x0007u, map("ALERT"));
 178   EXPECT_EQ(0x0009u, map("HORIZONTAL TABULATION"));
 179   EXPECT_EQ(0x0009u, map("CHARACTER TABULATION"));
 180   EXPECT_EQ(0x000Au, map("LINE FEED"));
 181   EXPECT_EQ(0x000Au, map("NEW LINE"));
 182   EXPECT_EQ(0x0089u, map("CHARACTER TABULATION WITH JUSTIFICATION"));
 183   EXPECT_EQ(0x0089u, map("HORIZONTAL TABULATION WITH JUSTIFICATION"));
 184   EXPECT_EQ(0x2118u,
 185             map("WEIERSTRASS ELLIPTIC FUNCTION"));      // correction
 186   EXPECT_EQ(0x2118u, map("SCRIPT CAPITAL P"));          // correction
 187   EXPECT_EQ(0xFEFFu, map("BYTE ORDER MARK"));           // alternate
 188   EXPECT_EQ(0xFEFFu, map("ZERO WIDTH NO-BREAK SPACE")); // alternate
 189
 190   // Should perform exact case match
 191   EXPECT_EQ(0xFFFFFFFFu, map(""));
 192   EXPECT_EQ(0xFFFFFFFFu, map("NOT A UNICODE CHARACTER"));
 193   EXPECT_EQ(0xFFFFFFFFu, map("unicorn face"));
 194   EXPECT_EQ(0xFFFFFFFFu, map("UNICORN FaCE"));
 195   EXPECT_EQ(0xFFFFFFFFu, map("UNICORNFaCE"));
 196   EXPECT_EQ(0xFFFFFFFFu, map("UNICORN"));
 197   EXPECT_EQ(0xFFFFFFFFu, map("HANGUL SYLLABLE i"));
 198   EXPECT_EQ(0xFFFFFFFFu, map("hANGUL SYLLABLE i"));
 199   EXPECT_EQ(0xFFFFFFFFu, map("HANGULSYLLABLEI"));
 200   EXPECT_EQ(0xFFFFFFFFu, map("HANGUL SYLLABLE"));
 201   EXPECT_EQ(0xFFFFFFFFu, map("cJK COMPATIBILITY IDEOGRAPH-2FA1D"));
 202   EXPECT_EQ(0xFFFFFFFFu, map("CJK COMPATIBILITY IDEOGRAPH-2FA1d"));
 203   EXPECT_EQ(0xFFFFFFFFu, map("CJK COMPATIBILITY IDEOGRAPH 2FA1D"));
 204   EXPECT_EQ(0xFFFFFFFF, map("CJK COMPATIBILITY IDEOGRAPH-NOTANUMBER"));
 205   EXPECT_EQ(0xFFFFFFFFu, map("CJK COMPATIBILITY IDEOGRAPH-1"));
 206   EXPECT_EQ(0xFFFFFFFFu, map("ZERO WIDTH NO BREAK SPACE"));
 207
 208   // Should not support abbreviations or figments
 209   EXPECT_EQ(0xFFFFFFFFu, map("FVS1"));
 210   EXPECT_EQ(0xFFFFFFFFu, map("HIGH OCTET PRESET"));
 211   EXPECT_EQ(0xFFFFFFFFu, map("BEL"));
 212 }
 213
 214 TEST(Unicode, nameToCodepointLoose) {
 215   auto map = [](StringRef Str) {
 216     auto Opt = nameToCodepointLooseMatching(Str);
 217     if (!Opt)
 218       return char32_t(0xFFFF'FFFF);
 219     return Opt->CodePoint;
 220   };
 221
 222   // generated codepoints
 223   EXPECT_EQ(0x04DBFu, map("CJK UNIFIED IDEOGRAPH-4DBF"));
 224   EXPECT_EQ(0x04E00u, map("CJK UNIFIED IDEOGRAPH-4E00"));
 225   EXPECT_EQ(0x09FFCu, map("CJK UNIFIED IDEOGRAPH-9FFC"));
 226   EXPECT_EQ(0x20000u, map("CJK UNIFIED IDEOGRAPH-20000"));
 227   EXPECT_EQ(0x2A6DDu, map("CJK UNIFIED IDEOGRAPH-2A6DD"));
 228   EXPECT_EQ(0x2A700u, map("CJK UNIFIED IDEOGRAPH-2A700"));
 229   EXPECT_EQ(0x2B740u, map("CJK UNIFIED IDEOGRAPH-2B740"));
 230   EXPECT_EQ(0x03400u, map("CJK UNIFIED IDEOGRAPH-3400"));
 231   EXPECT_EQ(0x2B81Du, map("CJK UNIFIED IDEOGRAPH-2B81D"));
 232   EXPECT_EQ(0x2B820u, map("CJK UNIFIED IDEOGRAPH-2B820"));
 233   EXPECT_EQ(0x2CEA1u, map("CJK UNIFIED IDEOGRAPH-2CEA1"));
 234   EXPECT_EQ(0x2CEB0u, map("CJK UNIFIED IDEOGRAPH-2CEB0"));
 235   EXPECT_EQ(0x2EBE0u, map("CJK UNIFIED IDEOGRAPH-2EBE0"));
 236   EXPECT_EQ(0x30000u, map("CJK UNIFIED IDEOGRAPH-30000"));
 237   EXPECT_EQ(0x3134Au, map("CJK UNIFIED IDEOGRAPH-3134A"));
 238   EXPECT_EQ(0x17000u, map("TANGUT IDEOGRAPH-17000"));
 239   EXPECT_EQ(0x187F7u, map("TANGUT IDEOGRAPH-187F7"));
 240   EXPECT_EQ(0x18D00u, map("TANGUT IDEOGRAPH-18D00"));
 241   EXPECT_EQ(0x18D08u, map("TANGUT IDEOGRAPH-18D08"));
 242   EXPECT_EQ(0x18B00u, map("KHITAN SMALL SCRIPT CHARACTER-18B00"));
 243   EXPECT_EQ(0x18CD5u, map("KHITAN SMALL SCRIPT CHARACTER-18CD5"));
 244   EXPECT_EQ(0x1B170u, map("NUSHU CHARACTER-1B170"));
 245   EXPECT_EQ(0x1B2FBu, map("NUSHU CHARACTER-1B2FB"));
 246   EXPECT_EQ(0x0F900u, map("CJK COMPATIBILITY IDEOGRAPH-F900"));
 247   EXPECT_EQ(0x0FA6Du, map("CJK COMPATIBILITY IDEOGRAPH-FA6D"));
 248   EXPECT_EQ(0x0FA70u, map("CJK COMPATIBILITY IDEOGRAPH-FA70"));
 249   EXPECT_EQ(0x0FAD9u, map("CJK COMPATIBILITY IDEOGRAPH-FAD9"));
 250   EXPECT_EQ(0x2F800u, map("CJK COMPATIBILITY IDEOGRAPH-2F800"));
 251   EXPECT_EQ(0x2FA1Du, map("CJK COMPATIBILITY IDEOGRAPH-2FA1D"));
 252
 253   EXPECT_EQ(0xAC00u, map("HANGUL SYLLABLE GA"));
 254   EXPECT_EQ(0xAC14u, map("HANGUL SYLLABLE GASS"));
 255   EXPECT_EQ(0xAC2Bu, map("HANGUL SYLLABLE GAELH"));
 256   EXPECT_EQ(0xAC7Bu, map("HANGUL SYLLABLE GEOLB"));
 257   EXPECT_EQ(0xC640u, map("HANGUL SYLLABLE WA"));
 258   EXPECT_EQ(0xC544u, map("HANGUL SYLLABLE A"));
 259   EXPECT_EQ(0xC5D0u, map("HANGUL SYLLABLE E"));
 260   EXPECT_EQ(0xC774u, map("HANGUL SYLLABLE I"));
 261
 262   EXPECT_EQ(0x1F984u, map("UNICORN FACE"));
 263   EXPECT_EQ(0x00640u, map("ARABIC TATWEEL"));
 264   EXPECT_EQ(0x02C05u, map("GLAGOLITIC CAPITAL LETTER YESTU"));
 265   EXPECT_EQ(0x13000u, map("EGYPTIAN HIEROGLYPH A001"));
 266   EXPECT_EQ(0x02235u, map("BECAUSE"));
 267   EXPECT_EQ(0x1F514u, map("BELL"));
 268   EXPECT_EQ(0x1F9A9u, map("FLAMINGO"));
 269   EXPECT_EQ(0x1F402u, map("OX")); // 2 characters
 270   EXPECT_EQ(0x0FBF9u, map("ARABIC LIGATURE UIGHUR KIRGHIZ YEH WITH HAMZA "
 271                           "ABOVE WITH ALEF MAKSURA ISOLATED FORM"));
 272
 273   // Aliases
 274   EXPECT_EQ(0x0000u, map("NULL"));
 275   EXPECT_EQ(0x0007u, map("ALERT"));
 276   EXPECT_EQ(0x0009u, map("HORIZONTAL TABULATION"));
 277   EXPECT_EQ(0x0009u, map("CHARACTER TABULATION"));
 278   EXPECT_EQ(0x000Au, map("LINE FEED"));
 279   EXPECT_EQ(0x000Au, map("NEW LINE"));
 280   EXPECT_EQ(0x0089u, map("CHARACTER TABULATION WITH JUSTIFICATION"));
 281   EXPECT_EQ(0x0089u, map("HORIZONTAL TABULATION WITH JUSTIFICATION"));
 282   EXPECT_EQ(0x2118u,
 283             map("WEIERSTRASS ELLIPTIC FUNCTION"));      // correction
 284   EXPECT_EQ(0x2118u, map("SCRIPT CAPITAL P"));          // correction
 285   EXPECT_EQ(0xFEFFu, map("BYTE ORDER MARK"));           // alternate
 286   EXPECT_EQ(0xFEFFu, map("ZERO WIDTH NO-BREAK SPACE")); // alternate
 287   EXPECT_EQ(0xFEFFu, map("ZERO WIDTH NO BREAK SPACE")); // alternate
 288
 289   // Should perform loose matching
 290   EXPECT_EQ(0xFFFFFFFFu, map(""));
 291   EXPECT_EQ(0xFFFFFFFFu, map("NOT A UNICODE CHARACTER"));
 292   EXPECT_EQ(0x0001F984u, map("unicorn face"));
 293   EXPECT_EQ(0x0001F984u, map("UNICORN FaCE"));
 294   EXPECT_EQ(0x0001F984u, map("UNICORNFaCE"));
 295   EXPECT_EQ(0xFFFFFFFFu, map("UNICORN"));
 296   EXPECT_EQ(0xC774u, map("HANGUL SYLLABLE i"));
 297   EXPECT_EQ(0xC774u, map("hANGUL SYLLABLE i"));
 298   EXPECT_EQ(0xC774u, map("HANGULSYLLABLEI"));
 299   EXPECT_EQ(0xFFFFFFFFu, map("HANGUL SYLLABLE"));
 300
 301   EXPECT_EQ(0x2FA1Du, map("cJK COMPATIBILITY IDEOGRAPH-2FA1D"));
 302   EXPECT_EQ(0x2FA1Du, map("CJK COMPATIBILITY IDEOGRAPH-2FA1d"));
 303   EXPECT_EQ(0x2FA1Du, map("CJK COMPATIBILITY IDEOGRAPH 2FA1D"));
 304
 305   EXPECT_EQ(0xFFFFFFFFu, map("CJK COMPATIBILITY IDEOGRAPH-NOTANUMBER"));
 306   EXPECT_EQ(0xFFFFFFFFu, map("CJK COMPATIBILITY IDEOGRAPH-1"));
 307
 308   // https://unicode.org/reports/tr44/#Matching_Names
 309   // UAX44-LM2: Medial hypens are ignored, non medial hyphens are not
 310   EXPECT_EQ(0x1FBC5u, map("S-T-I-C-K-F-I-G-U-R-E"));
 311   EXPECT_EQ(0xFFFFFFFFu, map("-STICK FIGURE"));
 312   EXPECT_EQ(0xFFFFFFFFu, map("STICK FIGURE-"));
 313   EXPECT_EQ(0xFFFFFFFFu, map("STICK FIGURE -"));
 314   EXPECT_EQ(0xFFFFFFFFu, map("STICK FIGURE --"));
 315   EXPECT_EQ(0xFFFFFFFFu, map("STICK--FIGURE"));
 316
 317   EXPECT_EQ(0x0F68u, map("TIBETAN LETTER A"));
 318   EXPECT_EQ(0x0F68u, map("TIBETAN LETTERA"));
 319   EXPECT_EQ(0x0F68u, map("TIBETAN LETTER-A"));
 320   EXPECT_EQ(0x0F60u, map("TIBETAN LETTER -A"));
 321   EXPECT_EQ(0x0F60u, map("TIBETAN LETTER  -A"));
 322
 323   // GH64161
 324   EXPECT_EQ(0x202Du, map("LEFT-TO-RIGHT OVERRIDE"));
 325   EXPECT_EQ(0x202Du, map("LEFT TO RIGHT OVERRIDE"));
 326   EXPECT_EQ(0x202Du, map("LEFTTORIGHTOVERRIDE"));
 327   EXPECT_EQ(0x202Du, map("LEFT-TO-RIGHT-OVERRIDE"));
 328   EXPECT_FALSE(nameToCodepointLooseMatching("-LEFT-TO-RIGHT OVERRIDE"));
 329   EXPECT_FALSE(nameToCodepointLooseMatching("LEFT-TO-RIGHT OVERRIDE-"));
 330
 331   // special case
 332   EXPECT_EQ(0x1180u, map("HANGUL JUNGSEONG O-E"));
 333   EXPECT_EQ(0x116Cu, map("HANGUL JUNGSEONG OE"));
 334
 335   // names that are prefix to existing characters should not match
 336   EXPECT_FALSE(nameToCodepointLooseMatching("B"));
 337   EXPECT_FALSE(nameToCodepointLooseMatching("BE"));
 338   EXPECT_FALSE(nameToCodepointLooseMatching("BEE"));
 339   EXPECT_FALSE(nameToCodepointLooseMatching("BEET"));
 340   EXPECT_FALSE(nameToCodepointLooseMatching("BEETL"));
 341   EXPECT_TRUE(nameToCodepointLooseMatching("BEETLE"));
 342 }
 343
 344 } // namespace
 345
 346 bool operator==(MatchForCodepointName a, MatchForCodepointName b) {
 347   return a.Name == b.Name && a.Distance == b.Distance && a.Value == b.Value;
 348 }
 349
 350 namespace {
 351
 352 TEST(Unicode, nearestMatchesForCodepointName) {
 353   auto Normalize = [](StringRef Name) {
 354     std::string Out;
 355     Out.reserve(Name.size());
 356     for (char C : Name) {
 357       if (isAlnum(C))
 358         Out.push_back(toUpper(C));
 359     }
 360     return Out;
 361   };
 362
 363   auto L = [&](StringRef name) {
 364     auto v = nearestMatchesForCodepointName(name, 3);
 365     for (auto &r : v) {
 366       auto A = Normalize(r.Name);
 367       auto B = Normalize(name);
 368       EXPECT_EQ(StringRef(A).edit_distance(B, true), r.Distance);
 369     }
 370     return v;
 371   };
 372   using ::testing::ElementsAre;
 373   using M = MatchForCodepointName;
 374
 375   ASSERT_THAT(L(""), ElementsAre(M{"OX", 2, 0x1F402}, M{"ANT", 3, 0x1F41C},
 376                                  M{"ARC", 3, 0x2312}));
 377   // shortest name
 378   ASSERT_THAT(L("OX"), ElementsAre(M{"OX", 0, 0x1F402}, M{"AXE", 2, 0x1FA93},
 379                                    M{"BOY", 2, 0x1F466}));
 380
 381   // longest name
 382   ASSERT_THAT(L("ARABIC LIGATURE UIGHUR KIRGHIZ YEH WITH HAMZA ABOVE WITH ALEF "
 383                 "MAKSURA INITIAL FORM"),
 384               ElementsAre(M{"ARABIC LIGATURE UIGHUR KIRGHIZ YEH WITH HAMZA "
 385                             "ABOVE WITH ALEF MAKSURA INITIAL FORM",
 386                             0, 0xFBFB},
 387                           M{"ARABIC LIGATURE UIGHUR KIRGHIZ YEH WITH HAMZA "
 388                             "ABOVE WITH ALEF MAKSURA FINAL FORM",
 389                             4, 0xFBFA},
 390                           M{"ARABIC LIGATURE UIGHUR KIRGHIZ YEH WITH HAMZA "
 391                             "ABOVE WITH ALEF MAKSURA ISOLATED FORM",
 392                             7, 0xFBF9}));
 393
 394   // same result with underscore, spaces, etc
 395   ASSERT_THAT(L("______ARABICLIGATUREUIGHUR KIRGHIZ YEH with HAMZA ABOVE WITH "
 396                 "ALEF MAKsURAINITIAL form_"),
 397               ElementsAre(M{"ARABIC LIGATURE UIGHUR KIRGHIZ YEH WITH HAMZA "
 398                             "ABOVE WITH ALEF MAKSURA INITIAL FORM",
 399                             0, 0xFBFB},
 400                           M{"ARABIC LIGATURE UIGHUR KIRGHIZ YEH WITH HAMZA "
 401                             "ABOVE WITH ALEF MAKSURA FINAL FORM",
 402                             4, 0xFBFA},
 403                           M{"ARABIC LIGATURE UIGHUR KIRGHIZ YEH WITH HAMZA "
 404                             "ABOVE WITH ALEF MAKSURA ISOLATED FORM",
 405                             7, 0xFBF9}));
 406
 407   ASSERT_THAT(L("GREEK CAPITAL LETTER LAMBDA"),
 408               ElementsAre(M{"GREEK CAPITAL LETTER LAMDA", 1, 0x39B},
 409                           M{"GREEK CAPITAL LETTER GAMMA", 3, 0x0393},
 410                           M{"GREEK CAPITAL LETTER ALPHA", 4, 0x0391}));
 411
 412   ASSERT_THAT(L("greekcapitalletter-lambda"),
 413               ElementsAre(M{"GREEK CAPITAL LETTER LAMDA", 1, 0x39B},
 414                           M{"GREEK CAPITAL LETTER GAMMA", 3, 0x0393},
 415                           M{"GREEK CAPITAL LETTER ALPHA", 4, 0x0391}));
 416
 417   // typo http://www.unicode.org/notes/tn27/tn27-5.html
 418   ASSERT_THAT(
 419       L("PRESENTATION FORM FOR VERTICAL RIGHT WHITE LENTICULAR BRAKCET"),
 420       ElementsAre(
 421           M{"PRESENTATION FORM FOR VERTICAL RIGHT WHITE LENTICULAR BRAKCET", 0,
 422             0xFE18}, // typo
 423           M{"PRESENTATION FORM FOR VERTICAL RIGHT WHITE LENTICULAR BRACKET", 2,
 424             0xFE18}, // correction
 425           M{"PRESENTATION FORM FOR VERTICAL LEFT WHITE LENTICULAR BRACKET", 6,
 426             0xFE17}));
 427
 428   // typo http://www.unicode.org/notes/tn27/tn27-5.html
 429   ASSERT_THAT(
 430       L("BYZANTINE MUSICAL SYMBOL FHTORA SKLIRON CHROMA VASIS"),
 431       ElementsAre(
 432           M{"BYZANTINE MUSICAL SYMBOL FHTORA SKLIRON CHROMA VASIS", 0, 0x1D0C5},
 433           M{"BYZANTINE MUSICAL SYMBOL FTHORA SKLIRON CHROMA VASIS", 2, 0x1D0C5},
 434           M{"BYZANTINE MUSICAL SYMBOL FTHORA SKLIRON CHROMA SYNAFI", 7,
 435             0x1D0C6}));
 436 }
 437
 438 } // namespace
 439 } // namespace unicode
 440 } // namespace sys
 441 } // namespace llvm