unittests/ADT/StringRefTest.cpp

   1 //===- llvm/unittest/ADT/StringRefTest.cpp - StringRef unit tests ---------===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9
  10 #include "gtest/gtest.h"
  11 #include "llvm/ADT/StringRef.h"
  12 #include "llvm/ADT/Hashing.h"
  13 #include "llvm/ADT/SmallVector.h"
  14 #include "llvm/Support/raw_ostream.h"
  15 using namespace llvm;
  16
  17 namespace llvm {
  18
  19 std::ostream &operator<<(std::ostream &OS, const StringRef &S) {
  20   OS << S.str();
  21   return OS;
  22 }
  23
  24 std::ostream &operator<<(std::ostream &OS,
  25                          const std::pair<StringRef, StringRef> &P) {
  26   OS << "(" << P.first << ", " << P.second << ")";
  27   return OS;
  28 }
  29
  30 }
  31
  32 namespace {
  33 TEST(StringRefTest, Construction) {
  34   EXPECT_EQ("", StringRef());
  35   EXPECT_EQ("hello", StringRef("hello"));
  36   EXPECT_EQ("hello", StringRef("hello world", 5));
  37   EXPECT_EQ("hello", StringRef(std::string("hello")));
  38 }
  39
  40 TEST(StringRefTest, Iteration) {
  41   StringRef S("hello");
  42   const char *p = "hello";
  43   for (const char *it = S.begin(), *ie = S.end(); it != ie; ++it, ++p)
  44     EXPECT_EQ(*it, *p);
  45 }
  46
  47 TEST(StringRefTest, StringOps) {
  48   const char *p = "hello";
  49   EXPECT_EQ(p, StringRef(p, 0).data());
  50   EXPECT_TRUE(StringRef().empty());
  51   EXPECT_EQ((size_t) 5, StringRef("hello").size());
  52   EXPECT_EQ(-1, StringRef("aab").compare("aad"));
  53   EXPECT_EQ( 0, StringRef("aab").compare("aab"));
  54   EXPECT_EQ( 1, StringRef("aab").compare("aaa"));
  55   EXPECT_EQ(-1, StringRef("aab").compare("aabb"));
  56   EXPECT_EQ( 1, StringRef("aab").compare("aa"));
  57   EXPECT_EQ( 1, StringRef("\xFF").compare("\1"));
  58
  59   EXPECT_EQ(-1, StringRef("AaB").compare_lower("aAd"));
  60   EXPECT_EQ( 0, StringRef("AaB").compare_lower("aab"));
  61   EXPECT_EQ( 1, StringRef("AaB").compare_lower("AAA"));
  62   EXPECT_EQ(-1, StringRef("AaB").compare_lower("aaBb"));
  63   EXPECT_EQ( 1, StringRef("AaB").compare_lower("aA"));
  64   EXPECT_EQ( 1, StringRef("\xFF").compare_lower("\1"));
  65
  66   EXPECT_EQ(-1, StringRef("aab").compare_numeric("aad"));
  67   EXPECT_EQ( 0, StringRef("aab").compare_numeric("aab"));
  68   EXPECT_EQ( 1, StringRef("aab").compare_numeric("aaa"));
  69   EXPECT_EQ(-1, StringRef("aab").compare_numeric("aabb"));
  70   EXPECT_EQ( 1, StringRef("aab").compare_numeric("aa"));
  71   EXPECT_EQ(-1, StringRef("1").compare_numeric("10"));
  72   EXPECT_EQ( 0, StringRef("10").compare_numeric("10"));
  73   EXPECT_EQ( 0, StringRef("10a").compare_numeric("10a"));
  74   EXPECT_EQ( 1, StringRef("2").compare_numeric("1"));
  75   EXPECT_EQ( 0, StringRef("llvm_v1i64_ty").compare_numeric("llvm_v1i64_ty"));
  76   EXPECT_EQ( 1, StringRef("\xFF").compare_numeric("\1"));
  77   EXPECT_EQ( 1, StringRef("V16").compare_numeric("V1_q0"));
  78   EXPECT_EQ(-1, StringRef("V1_q0").compare_numeric("V16"));
  79   EXPECT_EQ(-1, StringRef("V8_q0").compare_numeric("V16"));
  80   EXPECT_EQ( 1, StringRef("V16").compare_numeric("V8_q0"));
  81   EXPECT_EQ(-1, StringRef("V1_q0").compare_numeric("V8_q0"));
  82   EXPECT_EQ( 1, StringRef("V8_q0").compare_numeric("V1_q0"));
  83 }
  84
  85 TEST(StringRefTest, Operators) {
  86   EXPECT_EQ("", StringRef());
  87   EXPECT_TRUE(StringRef("aab") < StringRef("aad"));
  88   EXPECT_FALSE(StringRef("aab") < StringRef("aab"));
  89   EXPECT_TRUE(StringRef("aab") <= StringRef("aab"));
  90   EXPECT_FALSE(StringRef("aab") <= StringRef("aaa"));
  91   EXPECT_TRUE(StringRef("aad") > StringRef("aab"));
  92   EXPECT_FALSE(StringRef("aab") > StringRef("aab"));
  93   EXPECT_TRUE(StringRef("aab") >= StringRef("aab"));
  94   EXPECT_FALSE(StringRef("aaa") >= StringRef("aab"));
  95   EXPECT_EQ(StringRef("aab"), StringRef("aab"));
  96   EXPECT_FALSE(StringRef("aab") == StringRef("aac"));
  97   EXPECT_FALSE(StringRef("aab") != StringRef("aab"));
  98   EXPECT_TRUE(StringRef("aab") != StringRef("aac"));
  99   EXPECT_EQ('a', StringRef("aab")[1]);
 100 }
 101
 102 TEST(StringRefTest, Substr) {
 103   StringRef Str("hello");
 104   EXPECT_EQ("lo", Str.substr(3));
 105   EXPECT_EQ("", Str.substr(100));
 106   EXPECT_EQ("hello", Str.substr(0, 100));
 107   EXPECT_EQ("o", Str.substr(4, 10));
 108 }
 109
 110 TEST(StringRefTest, Slice) {
 111   StringRef Str("hello");
 112   EXPECT_EQ("l", Str.slice(2, 3));
 113   EXPECT_EQ("ell", Str.slice(1, 4));
 114   EXPECT_EQ("llo", Str.slice(2, 100));
 115   EXPECT_EQ("", Str.slice(2, 1));
 116   EXPECT_EQ("", Str.slice(10, 20));
 117 }
 118
 119 TEST(StringRefTest, Split) {
 120   StringRef Str("hello");
 121   EXPECT_EQ(std::make_pair(StringRef("hello"), StringRef("")),
 122             Str.split('X'));
 123   EXPECT_EQ(std::make_pair(StringRef("h"), StringRef("llo")),
 124             Str.split('e'));
 125   EXPECT_EQ(std::make_pair(StringRef(""), StringRef("ello")),
 126             Str.split('h'));
 127   EXPECT_EQ(std::make_pair(StringRef("he"), StringRef("lo")),
 128             Str.split('l'));
 129   EXPECT_EQ(std::make_pair(StringRef("hell"), StringRef("")),
 130             Str.split('o'));
 131
 132   EXPECT_EQ(std::make_pair(StringRef("hello"), StringRef("")),
 133             Str.rsplit('X'));
 134   EXPECT_EQ(std::make_pair(StringRef("h"), StringRef("llo")),
 135             Str.rsplit('e'));
 136   EXPECT_EQ(std::make_pair(StringRef(""), StringRef("ello")),
 137             Str.rsplit('h'));
 138   EXPECT_EQ(std::make_pair(StringRef("hel"), StringRef("o")),
 139             Str.rsplit('l'));
 140   EXPECT_EQ(std::make_pair(StringRef("hell"), StringRef("")),
 141             Str.rsplit('o'));
 142 }
 143
 144 TEST(StringRefTest, Split2) {
 145   SmallVector<StringRef, 5> parts;
 146   SmallVector<StringRef, 5> expected;
 147
 148   expected.push_back("ab"); expected.push_back("c");
 149   StringRef(",ab,,c,").split(parts, ",", -1, false);
 150   EXPECT_TRUE(parts == expected);
 151
 152   expected.clear(); parts.clear();
 153   expected.push_back(""); expected.push_back("ab"); expected.push_back("");
 154   expected.push_back("c"); expected.push_back("");
 155   StringRef(",ab,,c,").split(parts, ",", -1, true);
 156   EXPECT_TRUE(parts == expected);
 157
 158   expected.clear(); parts.clear();
 159   expected.push_back("");
 160   StringRef("").split(parts, ",", -1, true);
 161   EXPECT_TRUE(parts == expected);
 162
 163   expected.clear(); parts.clear();
 164   StringRef("").split(parts, ",", -1, false);
 165   EXPECT_TRUE(parts == expected);
 166
 167   expected.clear(); parts.clear();
 168   StringRef(",").split(parts, ",", -1, false);
 169   EXPECT_TRUE(parts == expected);
 170
 171   expected.clear(); parts.clear();
 172   expected.push_back(""); expected.push_back("");
 173   StringRef(",").split(parts, ",", -1, true);
 174   EXPECT_TRUE(parts == expected);
 175
 176   expected.clear(); parts.clear();
 177   expected.push_back("a"); expected.push_back("b");
 178   StringRef("a,b").split(parts, ",", -1, true);
 179   EXPECT_TRUE(parts == expected);
 180
 181   // Test MaxSplit
 182   expected.clear(); parts.clear();
 183   expected.push_back("a,,b,c");
 184   StringRef("a,,b,c").split(parts, ",", 0, true);
 185   EXPECT_TRUE(parts == expected);
 186
 187   expected.clear(); parts.clear();
 188   expected.push_back("a,,b,c");
 189   StringRef("a,,b,c").split(parts, ",", 0, false);
 190   EXPECT_TRUE(parts == expected);
 191
 192   expected.clear(); parts.clear();
 193   expected.push_back("a"); expected.push_back(",b,c");
 194   StringRef("a,,b,c").split(parts, ",", 1, true);
 195   EXPECT_TRUE(parts == expected);
 196
 197   expected.clear(); parts.clear();
 198   expected.push_back("a"); expected.push_back(",b,c");
 199   StringRef("a,,b,c").split(parts, ",", 1, false);
 200   EXPECT_TRUE(parts == expected);
 201
 202   expected.clear(); parts.clear();
 203   expected.push_back("a"); expected.push_back(""); expected.push_back("b,c");
 204   StringRef("a,,b,c").split(parts, ",", 2, true);
 205   EXPECT_TRUE(parts == expected);
 206
 207   expected.clear(); parts.clear();
 208   expected.push_back("a"); expected.push_back("b,c");
 209   StringRef("a,,b,c").split(parts, ",", 2, false);
 210   EXPECT_TRUE(parts == expected);
 211
 212   expected.clear(); parts.clear();
 213   expected.push_back("a"); expected.push_back(""); expected.push_back("b");
 214   expected.push_back("c");
 215   StringRef("a,,b,c").split(parts, ",", 3, true);
 216   EXPECT_TRUE(parts == expected);
 217
 218   expected.clear(); parts.clear();
 219   expected.push_back("a"); expected.push_back("b"); expected.push_back("c");
 220   StringRef("a,,b,c").split(parts, ",", 3, false);
 221   EXPECT_TRUE(parts == expected);
 222 }
 223
 224 TEST(StringRefTest, StartsWith) {
 225   StringRef Str("hello");
 226   EXPECT_TRUE(Str.startswith("he"));
 227   EXPECT_FALSE(Str.startswith("helloworld"));
 228   EXPECT_FALSE(Str.startswith("hi"));
 229 }
 230
 231 TEST(StringRefTest, EndsWith) {
 232   StringRef Str("hello");
 233   EXPECT_TRUE(Str.endswith("lo"));
 234   EXPECT_FALSE(Str.endswith("helloworld"));
 235   EXPECT_FALSE(Str.endswith("worldhello"));
 236   EXPECT_FALSE(Str.endswith("so"));
 237 }
 238
 239 TEST(StringRefTest, Find) {
 240   StringRef Str("hello");
 241   EXPECT_EQ(2U, Str.find('l'));
 242   EXPECT_EQ(StringRef::npos, Str.find('z'));
 243   EXPECT_EQ(StringRef::npos, Str.find("helloworld"));
 244   EXPECT_EQ(0U, Str.find("hello"));
 245   EXPECT_EQ(1U, Str.find("ello"));
 246   EXPECT_EQ(StringRef::npos, Str.find("zz"));
 247   EXPECT_EQ(2U, Str.find("ll", 2));
 248   EXPECT_EQ(StringRef::npos, Str.find("ll", 3));
 249   EXPECT_EQ(0U, Str.find(""));
 250   StringRef LongStr("hellx xello hell ello world foo bar hello");
 251   EXPECT_EQ(36U, LongStr.find("hello"));
 252   EXPECT_EQ(28U, LongStr.find("foo"));
 253   EXPECT_EQ(12U, LongStr.find("hell", 2));
 254   EXPECT_EQ(0U, LongStr.find(""));
 255
 256   EXPECT_EQ(3U, Str.rfind('l'));
 257   EXPECT_EQ(StringRef::npos, Str.rfind('z'));
 258   EXPECT_EQ(StringRef::npos, Str.rfind("helloworld"));
 259   EXPECT_EQ(0U, Str.rfind("hello"));
 260   EXPECT_EQ(1U, Str.rfind("ello"));
 261   EXPECT_EQ(StringRef::npos, Str.rfind("zz"));
 262
 263   EXPECT_EQ(2U, Str.find_first_of('l'));
 264   EXPECT_EQ(1U, Str.find_first_of("el"));
 265   EXPECT_EQ(StringRef::npos, Str.find_first_of("xyz"));
 266
 267   EXPECT_EQ(1U, Str.find_first_not_of('h'));
 268   EXPECT_EQ(4U, Str.find_first_not_of("hel"));
 269   EXPECT_EQ(StringRef::npos, Str.find_first_not_of("hello"));
 270 }
 271
 272 TEST(StringRefTest, Count) {
 273   StringRef Str("hello");
 274   EXPECT_EQ(2U, Str.count('l'));
 275   EXPECT_EQ(1U, Str.count('o'));
 276   EXPECT_EQ(0U, Str.count('z'));
 277   EXPECT_EQ(0U, Str.count("helloworld"));
 278   EXPECT_EQ(1U, Str.count("hello"));
 279   EXPECT_EQ(1U, Str.count("ello"));
 280   EXPECT_EQ(0U, Str.count("zz"));
 281 }
 282
 283 TEST(StringRefTest, EditDistance) {
 284   StringRef Str("hello");
 285   EXPECT_EQ(2U, Str.edit_distance("hill"));
 286 }
 287
 288 TEST(StringRefTest, Misc) {
 289   std::string Storage;
 290   raw_string_ostream OS(Storage);
 291   OS << StringRef("hello");
 292   EXPECT_EQ("hello", OS.str());
 293 }
 294
 295 TEST(StringRefTest, Hashing) {
 296   EXPECT_EQ(hash_value(std::string()), hash_value(StringRef()));
 297   EXPECT_EQ(hash_value(std::string()), hash_value(StringRef("")));
 298   std::string S = "hello world";
 299   hash_code H = hash_value(S);
 300   EXPECT_EQ(H, hash_value(StringRef("hello world")));
 301   EXPECT_EQ(H, hash_value(StringRef(S)));
 302   EXPECT_NE(H, hash_value(StringRef("hello worl")));
 303   EXPECT_EQ(hash_value(std::string("hello worl")),
 304             hash_value(StringRef("hello worl")));
 305   EXPECT_NE(H, hash_value(StringRef("hello world ")));
 306   EXPECT_EQ(hash_value(std::string("hello world ")),
 307             hash_value(StringRef("hello world ")));
 308   EXPECT_EQ(H, hash_value(StringRef("hello world\0")));
 309   EXPECT_NE(hash_value(std::string("ello worl")),
 310             hash_value(StringRef("hello world").slice(1, -1)));
 311 }
 312
 313 struct UnsignedPair {
 314   const char *Str;
 315   uint64_t Expected;
 316 } Unsigned[] =
 317   { {"0", 0}
 318   , {"255", 255}
 319   , {"256", 256}
 320   , {"65535", 65535}
 321   , {"65536", 65536}
 322   , {"4294967295", 4294967295ULL}
 323   , {"4294967296", 4294967296ULL}
 324   , {"18446744073709551615", 18446744073709551615ULL}
 325   , {"042", 34}
 326   , {"0x42", 66}
 327   , {"0b101010", 42}
 328   };
 329
 330 struct SignedPair {
 331   const char *Str;
 332   int64_t Expected;
 333 } Signed[] =
 334   { {"0", 0}
 335   , {"-0", 0}
 336   , {"127", 127}
 337   , {"128", 128}
 338   , {"-128", -128}
 339   , {"-129", -129}
 340   , {"32767", 32767}
 341   , {"32768", 32768}
 342   , {"-32768", -32768}
 343   , {"-32769", -32769}
 344   , {"2147483647", 2147483647LL}
 345   , {"2147483648", 2147483648LL}
 346   , {"-2147483648", -2147483648LL}
 347   , {"-2147483649", -2147483649LL}
 348   , {"-9223372036854775808", -(9223372036854775807LL) - 1}
 349   , {"042", 34}
 350   , {"0x42", 66}
 351   , {"0b101010", 42}
 352   , {"-042", -34}
 353   , {"-0x42", -66}
 354   , {"-0b101010", -42}
 355   };
 356
 357 TEST(StringRefTest, getAsInteger) {
 358   uint8_t U8;
 359   uint16_t U16;
 360   uint32_t U32;
 361   uint64_t U64;
 362
 363   for (size_t i = 0; i < array_lengthof(Unsigned); ++i) {
 364     bool U8Success = StringRef(Unsigned[i].Str).getAsInteger(0, U8);
 365     if (static_cast<uint8_t>(Unsigned[i].Expected) == Unsigned[i].Expected) {
 366       ASSERT_FALSE(U8Success);
 367       EXPECT_EQ(U8, Unsigned[i].Expected);
 368     } else {
 369       ASSERT_TRUE(U8Success);
 370     }
 371     bool U16Success = StringRef(Unsigned[i].Str).getAsInteger(0, U16);
 372     if (static_cast<uint16_t>(Unsigned[i].Expected) == Unsigned[i].Expected) {
 373       ASSERT_FALSE(U16Success);
 374       EXPECT_EQ(U16, Unsigned[i].Expected);
 375     } else {
 376       ASSERT_TRUE(U16Success);
 377     }
 378     bool U32Success = StringRef(Unsigned[i].Str).getAsInteger(0, U32);
 379     if (static_cast<uint32_t>(Unsigned[i].Expected) == Unsigned[i].Expected) {
 380       ASSERT_FALSE(U32Success);
 381       EXPECT_EQ(U32, Unsigned[i].Expected);
 382     } else {
 383       ASSERT_TRUE(U32Success);
 384     }
 385     bool U64Success = StringRef(Unsigned[i].Str).getAsInteger(0, U64);
 386     if (static_cast<uint64_t>(Unsigned[i].Expected) == Unsigned[i].Expected) {
 387       ASSERT_FALSE(U64Success);
 388       EXPECT_EQ(U64, Unsigned[i].Expected);
 389     } else {
 390       ASSERT_TRUE(U64Success);
 391     }
 392   }
 393
 394   int8_t S8;
 395   int16_t S16;
 396   int32_t S32;
 397   int64_t S64;
 398
 399   for (size_t i = 0; i < array_lengthof(Signed); ++i) {
 400     bool S8Success = StringRef(Signed[i].Str).getAsInteger(0, S8);
 401     if (static_cast<int8_t>(Signed[i].Expected) == Signed[i].Expected) {
 402       ASSERT_FALSE(S8Success);
 403       EXPECT_EQ(S8, Signed[i].Expected);
 404     } else {
 405       ASSERT_TRUE(S8Success);
 406     }
 407     bool S16Success = StringRef(Signed[i].Str).getAsInteger(0, S16);
 408     if (static_cast<int16_t>(Signed[i].Expected) == Signed[i].Expected) {
 409       ASSERT_FALSE(S16Success);
 410       EXPECT_EQ(S16, Signed[i].Expected);
 411     } else {
 412       ASSERT_TRUE(S16Success);
 413     }
 414     bool S32Success = StringRef(Signed[i].Str).getAsInteger(0, S32);
 415     if (static_cast<int32_t>(Signed[i].Expected) == Signed[i].Expected) {
 416       ASSERT_FALSE(S32Success);
 417       EXPECT_EQ(S32, Signed[i].Expected);
 418     } else {
 419       ASSERT_TRUE(S32Success);
 420     }
 421     bool S64Success = StringRef(Signed[i].Str).getAsInteger(0, S64);
 422     if (static_cast<int64_t>(Signed[i].Expected) == Signed[i].Expected) {
 423       ASSERT_FALSE(S64Success);
 424       EXPECT_EQ(S64, Signed[i].Expected);
 425     } else {
 426       ASSERT_TRUE(S64Success);
 427     }
 428   }
 429 }
 430
 431 } // end anonymous namespace