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 "llvm/ADT/StringRef.h"
  11 #include "llvm/ADT/StringExtras.h"
  12 #include "llvm/ADT/Hashing.h"
  13 #include "llvm/ADT/SmallVector.h"
  14 #include "llvm/Support/raw_ostream.h"
  15 #include "gtest/gtest.h"
  16 using namespace llvm;
  17
  18 namespace llvm {
  19
  20 std::ostream &operator<<(std::ostream &OS, const StringRef &S) {
  21   OS << S.str();
  22   return OS;
  23 }
  24
  25 std::ostream &operator<<(std::ostream &OS,
  26                          const std::pair<StringRef, StringRef> &P) {
  27   OS << "(" << P.first << ", " << P.second << ")";
  28   return OS;
  29 }
  30
  31 }
  32
  33 namespace {
  34 TEST(StringRefTest, Construction) {
  35   EXPECT_EQ("", StringRef());
  36   EXPECT_EQ("hello", StringRef("hello"));
  37   EXPECT_EQ("hello", StringRef("hello world", 5));
  38   EXPECT_EQ("hello", StringRef(std::string("hello")));
  39 }
  40
  41 TEST(StringRefTest, Iteration) {
  42   StringRef S("hello");
  43   const char *p = "hello";
  44   for (const char *it = S.begin(), *ie = S.end(); it != ie; ++it, ++p)
  45     EXPECT_EQ(*it, *p);
  46 }
  47
  48 TEST(StringRefTest, StringOps) {
  49   const char *p = "hello";
  50   EXPECT_EQ(p, StringRef(p, 0).data());
  51   EXPECT_TRUE(StringRef().empty());
  52   EXPECT_EQ((size_t) 5, StringRef("hello").size());
  53   EXPECT_EQ(-1, StringRef("aab").compare("aad"));
  54   EXPECT_EQ( 0, StringRef("aab").compare("aab"));
  55   EXPECT_EQ( 1, StringRef("aab").compare("aaa"));
  56   EXPECT_EQ(-1, StringRef("aab").compare("aabb"));
  57   EXPECT_EQ( 1, StringRef("aab").compare("aa"));
  58   EXPECT_EQ( 1, StringRef("\xFF").compare("\1"));
  59
  60   EXPECT_EQ(-1, StringRef("AaB").compare_lower("aAd"));
  61   EXPECT_EQ( 0, StringRef("AaB").compare_lower("aab"));
  62   EXPECT_EQ( 1, StringRef("AaB").compare_lower("AAA"));
  63   EXPECT_EQ(-1, StringRef("AaB").compare_lower("aaBb"));
  64   EXPECT_EQ(-1, StringRef("AaB").compare_lower("bb"));
  65   EXPECT_EQ( 1, StringRef("aaBb").compare_lower("AaB"));
  66   EXPECT_EQ( 1, StringRef("bb").compare_lower("AaB"));
  67   EXPECT_EQ( 1, StringRef("AaB").compare_lower("aA"));
  68   EXPECT_EQ( 1, StringRef("\xFF").compare_lower("\1"));
  69
  70   EXPECT_EQ(-1, StringRef("aab").compare_numeric("aad"));
  71   EXPECT_EQ( 0, StringRef("aab").compare_numeric("aab"));
  72   EXPECT_EQ( 1, StringRef("aab").compare_numeric("aaa"));
  73   EXPECT_EQ(-1, StringRef("aab").compare_numeric("aabb"));
  74   EXPECT_EQ( 1, StringRef("aab").compare_numeric("aa"));
  75   EXPECT_EQ(-1, StringRef("1").compare_numeric("10"));
  76   EXPECT_EQ( 0, StringRef("10").compare_numeric("10"));
  77   EXPECT_EQ( 0, StringRef("10a").compare_numeric("10a"));
  78   EXPECT_EQ( 1, StringRef("2").compare_numeric("1"));
  79   EXPECT_EQ( 0, StringRef("llvm_v1i64_ty").compare_numeric("llvm_v1i64_ty"));
  80   EXPECT_EQ( 1, StringRef("\xFF").compare_numeric("\1"));
  81   EXPECT_EQ( 1, StringRef("V16").compare_numeric("V1_q0"));
  82   EXPECT_EQ(-1, StringRef("V1_q0").compare_numeric("V16"));
  83   EXPECT_EQ(-1, StringRef("V8_q0").compare_numeric("V16"));
  84   EXPECT_EQ( 1, StringRef("V16").compare_numeric("V8_q0"));
  85   EXPECT_EQ(-1, StringRef("V1_q0").compare_numeric("V8_q0"));
  86   EXPECT_EQ( 1, StringRef("V8_q0").compare_numeric("V1_q0"));
  87 }
  88
  89 TEST(StringRefTest, Operators) {
  90   EXPECT_EQ("", StringRef());
  91   EXPECT_TRUE(StringRef("aab") < StringRef("aad"));
  92   EXPECT_FALSE(StringRef("aab") < StringRef("aab"));
  93   EXPECT_TRUE(StringRef("aab") <= StringRef("aab"));
  94   EXPECT_FALSE(StringRef("aab") <= StringRef("aaa"));
  95   EXPECT_TRUE(StringRef("aad") > StringRef("aab"));
  96   EXPECT_FALSE(StringRef("aab") > StringRef("aab"));
  97   EXPECT_TRUE(StringRef("aab") >= StringRef("aab"));
  98   EXPECT_FALSE(StringRef("aaa") >= StringRef("aab"));
  99   EXPECT_EQ(StringRef("aab"), StringRef("aab"));
 100   EXPECT_FALSE(StringRef("aab") == StringRef("aac"));
 101   EXPECT_FALSE(StringRef("aab") != StringRef("aab"));
 102   EXPECT_TRUE(StringRef("aab") != StringRef("aac"));
 103   EXPECT_EQ('a', StringRef("aab")[1]);
 104 }
 105
 106 TEST(StringRefTest, Substr) {
 107   StringRef Str("hello");
 108   EXPECT_EQ("lo", Str.substr(3));
 109   EXPECT_EQ("", Str.substr(100));
 110   EXPECT_EQ("hello", Str.substr(0, 100));
 111   EXPECT_EQ("o", Str.substr(4, 10));
 112 }
 113
 114 TEST(StringRefTest, Slice) {
 115   StringRef Str("hello");
 116   EXPECT_EQ("l", Str.slice(2, 3));
 117   EXPECT_EQ("ell", Str.slice(1, 4));
 118   EXPECT_EQ("llo", Str.slice(2, 100));
 119   EXPECT_EQ("", Str.slice(2, 1));
 120   EXPECT_EQ("", Str.slice(10, 20));
 121 }
 122
 123 TEST(StringRefTest, Split) {
 124   StringRef Str("hello");
 125   EXPECT_EQ(std::make_pair(StringRef("hello"), StringRef("")),
 126             Str.split('X'));
 127   EXPECT_EQ(std::make_pair(StringRef("h"), StringRef("llo")),
 128             Str.split('e'));
 129   EXPECT_EQ(std::make_pair(StringRef(""), StringRef("ello")),
 130             Str.split('h'));
 131   EXPECT_EQ(std::make_pair(StringRef("he"), StringRef("lo")),
 132             Str.split('l'));
 133   EXPECT_EQ(std::make_pair(StringRef("hell"), StringRef("")),
 134             Str.split('o'));
 135
 136   EXPECT_EQ(std::make_pair(StringRef("hello"), StringRef("")),
 137             Str.rsplit('X'));
 138   EXPECT_EQ(std::make_pair(StringRef("h"), StringRef("llo")),
 139             Str.rsplit('e'));
 140   EXPECT_EQ(std::make_pair(StringRef(""), StringRef("ello")),
 141             Str.rsplit('h'));
 142   EXPECT_EQ(std::make_pair(StringRef("hel"), StringRef("o")),
 143             Str.rsplit('l'));
 144   EXPECT_EQ(std::make_pair(StringRef("hell"), StringRef("")),
 145             Str.rsplit('o'));
 146 }
 147
 148 TEST(StringRefTest, Split2) {
 149   SmallVector<StringRef, 5> parts;
 150   SmallVector<StringRef, 5> expected;
 151
 152   expected.push_back("ab"); expected.push_back("c");
 153   StringRef(",ab,,c,").split(parts, ",", -1, false);
 154   EXPECT_TRUE(parts == expected);
 155
 156   expected.clear(); parts.clear();
 157   expected.push_back(""); expected.push_back("ab"); expected.push_back("");
 158   expected.push_back("c"); expected.push_back("");
 159   StringRef(",ab,,c,").split(parts, ",", -1, true);
 160   EXPECT_TRUE(parts == expected);
 161
 162   expected.clear(); parts.clear();
 163   expected.push_back("");
 164   StringRef("").split(parts, ",", -1, true);
 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   StringRef(",").split(parts, ",", -1, false);
 173   EXPECT_TRUE(parts == expected);
 174
 175   expected.clear(); parts.clear();
 176   expected.push_back(""); expected.push_back("");
 177   StringRef(",").split(parts, ",", -1, true);
 178   EXPECT_TRUE(parts == expected);
 179
 180   expected.clear(); parts.clear();
 181   expected.push_back("a"); expected.push_back("b");
 182   StringRef("a,b").split(parts, ",", -1, true);
 183   EXPECT_TRUE(parts == expected);
 184
 185   // Test MaxSplit
 186   expected.clear(); parts.clear();
 187   expected.push_back("a,,b,c");
 188   StringRef("a,,b,c").split(parts, ",", 0, true);
 189   EXPECT_TRUE(parts == expected);
 190
 191   expected.clear(); parts.clear();
 192   expected.push_back("a,,b,c");
 193   StringRef("a,,b,c").split(parts, ",", 0, false);
 194   EXPECT_TRUE(parts == expected);
 195
 196   expected.clear(); parts.clear();
 197   expected.push_back("a"); expected.push_back(",b,c");
 198   StringRef("a,,b,c").split(parts, ",", 1, true);
 199   EXPECT_TRUE(parts == expected);
 200
 201   expected.clear(); parts.clear();
 202   expected.push_back("a"); expected.push_back(",b,c");
 203   StringRef("a,,b,c").split(parts, ",", 1, false);
 204   EXPECT_TRUE(parts == expected);
 205
 206   expected.clear(); parts.clear();
 207   expected.push_back("a"); expected.push_back(""); expected.push_back("b,c");
 208   StringRef("a,,b,c").split(parts, ",", 2, true);
 209   EXPECT_TRUE(parts == expected);
 210
 211   expected.clear(); parts.clear();
 212   expected.push_back("a"); expected.push_back("b,c");
 213   StringRef("a,,b,c").split(parts, ",", 2, false);
 214   EXPECT_TRUE(parts == expected);
 215
 216   expected.clear(); parts.clear();
 217   expected.push_back("a"); expected.push_back(""); expected.push_back("b");
 218   expected.push_back("c");
 219   StringRef("a,,b,c").split(parts, ",", 3, true);
 220   EXPECT_TRUE(parts == expected);
 221
 222   expected.clear(); parts.clear();
 223   expected.push_back("a"); expected.push_back("b"); expected.push_back("c");
 224   StringRef("a,,b,c").split(parts, ",", 3, false);
 225   EXPECT_TRUE(parts == expected);
 226 }
 227
 228 TEST(StringRefTest, Trim) {
 229   StringRef Str0("hello");
 230   StringRef Str1(" hello ");
 231   StringRef Str2("  hello  ");
 232
 233   EXPECT_EQ(StringRef("hello"), Str0.rtrim());
 234   EXPECT_EQ(StringRef(" hello"), Str1.rtrim());
 235   EXPECT_EQ(StringRef("  hello"), Str2.rtrim());
 236   EXPECT_EQ(StringRef("hello"), Str0.ltrim());
 237   EXPECT_EQ(StringRef("hello "), Str1.ltrim());
 238   EXPECT_EQ(StringRef("hello  "), Str2.ltrim());
 239   EXPECT_EQ(StringRef("hello"), Str0.trim());
 240   EXPECT_EQ(StringRef("hello"), Str1.trim());
 241   EXPECT_EQ(StringRef("hello"), Str2.trim());
 242
 243   EXPECT_EQ(StringRef("ello"), Str0.trim("hhhhhhhhhhh"));
 244
 245   EXPECT_EQ(StringRef(""), StringRef("").trim());
 246   EXPECT_EQ(StringRef(""), StringRef(" ").trim());
 247   EXPECT_EQ(StringRef("\0", 1), StringRef(" \0 ", 3).trim());
 248   EXPECT_EQ(StringRef("\0\0", 2), StringRef("\0\0", 2).trim());
 249   EXPECT_EQ(StringRef("x"), StringRef("\0\0x\0\0", 5).trim(StringRef("\0", 1)));
 250 }
 251
 252 TEST(StringRefTest, StartsWith) {
 253   StringRef Str("hello");
 254   EXPECT_TRUE(Str.startswith(""));
 255   EXPECT_TRUE(Str.startswith("he"));
 256   EXPECT_FALSE(Str.startswith("helloworld"));
 257   EXPECT_FALSE(Str.startswith("hi"));
 258 }
 259
 260 TEST(StringRefTest, StartsWithLower) {
 261   StringRef Str("heLLo");
 262   EXPECT_TRUE(Str.startswith_lower(""));
 263   EXPECT_TRUE(Str.startswith_lower("he"));
 264   EXPECT_TRUE(Str.startswith_lower("hell"));
 265   EXPECT_TRUE(Str.startswith_lower("HELlo"));
 266   EXPECT_FALSE(Str.startswith_lower("helloworld"));
 267   EXPECT_FALSE(Str.startswith_lower("hi"));
 268 }
 269
 270 TEST(StringRefTest, EndsWith) {
 271   StringRef Str("hello");
 272   EXPECT_TRUE(Str.endswith(""));
 273   EXPECT_TRUE(Str.endswith("lo"));
 274   EXPECT_FALSE(Str.endswith("helloworld"));
 275   EXPECT_FALSE(Str.endswith("worldhello"));
 276   EXPECT_FALSE(Str.endswith("so"));
 277 }
 278
 279 TEST(StringRefTest, EndsWithLower) {
 280   StringRef Str("heLLo");
 281   EXPECT_TRUE(Str.endswith_lower(""));
 282   EXPECT_TRUE(Str.endswith_lower("lo"));
 283   EXPECT_TRUE(Str.endswith_lower("LO"));
 284   EXPECT_TRUE(Str.endswith_lower("ELlo"));
 285   EXPECT_FALSE(Str.endswith_lower("helloworld"));
 286   EXPECT_FALSE(Str.endswith_lower("hi"));
 287 }
 288
 289 TEST(StringRefTest, Find) {
 290   StringRef Str("hello");
 291   EXPECT_EQ(2U, Str.find('l'));
 292   EXPECT_EQ(StringRef::npos, Str.find('z'));
 293   EXPECT_EQ(StringRef::npos, Str.find("helloworld"));
 294   EXPECT_EQ(0U, Str.find("hello"));
 295   EXPECT_EQ(1U, Str.find("ello"));
 296   EXPECT_EQ(StringRef::npos, Str.find("zz"));
 297   EXPECT_EQ(2U, Str.find("ll", 2));
 298   EXPECT_EQ(StringRef::npos, Str.find("ll", 3));
 299   EXPECT_EQ(0U, Str.find(""));
 300   StringRef LongStr("hellx xello hell ello world foo bar hello");
 301   EXPECT_EQ(36U, LongStr.find("hello"));
 302   EXPECT_EQ(28U, LongStr.find("foo"));
 303   EXPECT_EQ(12U, LongStr.find("hell", 2));
 304   EXPECT_EQ(0U, LongStr.find(""));
 305
 306   EXPECT_EQ(3U, Str.rfind('l'));
 307   EXPECT_EQ(StringRef::npos, Str.rfind('z'));
 308   EXPECT_EQ(StringRef::npos, Str.rfind("helloworld"));
 309   EXPECT_EQ(0U, Str.rfind("hello"));
 310   EXPECT_EQ(1U, Str.rfind("ello"));
 311   EXPECT_EQ(StringRef::npos, Str.rfind("zz"));
 312
 313   EXPECT_EQ(2U, Str.find_first_of('l'));
 314   EXPECT_EQ(1U, Str.find_first_of("el"));
 315   EXPECT_EQ(StringRef::npos, Str.find_first_of("xyz"));
 316
 317   EXPECT_EQ(1U, Str.find_first_not_of('h'));
 318   EXPECT_EQ(4U, Str.find_first_not_of("hel"));
 319   EXPECT_EQ(StringRef::npos, Str.find_first_not_of("hello"));
 320
 321   EXPECT_EQ(3U, Str.find_last_not_of('o'));
 322   EXPECT_EQ(1U, Str.find_last_not_of("lo"));
 323   EXPECT_EQ(StringRef::npos, Str.find_last_not_of("helo"));
 324 }
 325
 326 TEST(StringRefTest, Count) {
 327   StringRef Str("hello");
 328   EXPECT_EQ(2U, Str.count('l'));
 329   EXPECT_EQ(1U, Str.count('o'));
 330   EXPECT_EQ(0U, Str.count('z'));
 331   EXPECT_EQ(0U, Str.count("helloworld"));
 332   EXPECT_EQ(1U, Str.count("hello"));
 333   EXPECT_EQ(1U, Str.count("ello"));
 334   EXPECT_EQ(0U, Str.count("zz"));
 335 }
 336
 337 TEST(StringRefTest, EditDistance) {
 338   StringRef Str("hello");
 339   EXPECT_EQ(2U, Str.edit_distance("hill"));
 340 }
 341
 342 TEST(StringRefTest, Misc) {
 343   std::string Storage;
 344   raw_string_ostream OS(Storage);
 345   OS << StringRef("hello");
 346   EXPECT_EQ("hello", OS.str());
 347 }
 348
 349 TEST(StringRefTest, Hashing) {
 350   EXPECT_EQ(hash_value(std::string()), hash_value(StringRef()));
 351   EXPECT_EQ(hash_value(std::string()), hash_value(StringRef("")));
 352   std::string S = "hello world";
 353   hash_code H = hash_value(S);
 354   EXPECT_EQ(H, hash_value(StringRef("hello world")));
 355   EXPECT_EQ(H, hash_value(StringRef(S)));
 356   EXPECT_NE(H, hash_value(StringRef("hello worl")));
 357   EXPECT_EQ(hash_value(std::string("hello worl")),
 358             hash_value(StringRef("hello worl")));
 359   EXPECT_NE(H, hash_value(StringRef("hello world ")));
 360   EXPECT_EQ(hash_value(std::string("hello world ")),
 361             hash_value(StringRef("hello world ")));
 362   EXPECT_EQ(H, hash_value(StringRef("hello world\0")));
 363   EXPECT_NE(hash_value(std::string("ello worl")),
 364             hash_value(StringRef("hello world").slice(1, -1)));
 365 }
 366
 367 struct UnsignedPair {
 368   const char *Str;
 369   uint64_t Expected;
 370 } Unsigned[] =
 371   { {"0", 0}
 372   , {"255", 255}
 373   , {"256", 256}
 374   , {"65535", 65535}
 375   , {"65536", 65536}
 376   , {"4294967295", 4294967295ULL}
 377   , {"4294967296", 4294967296ULL}
 378   , {"18446744073709551615", 18446744073709551615ULL}
 379   , {"042", 34}
 380   , {"0x42", 66}
 381   , {"0b101010", 42}
 382   };
 383
 384 struct SignedPair {
 385   const char *Str;
 386   int64_t Expected;
 387 } Signed[] =
 388   { {"0", 0}
 389   , {"-0", 0}
 390   , {"127", 127}
 391   , {"128", 128}
 392   , {"-128", -128}
 393   , {"-129", -129}
 394   , {"32767", 32767}
 395   , {"32768", 32768}
 396   , {"-32768", -32768}
 397   , {"-32769", -32769}
 398   , {"2147483647", 2147483647LL}
 399   , {"2147483648", 2147483648LL}
 400   , {"-2147483648", -2147483648LL}
 401   , {"-2147483649", -2147483649LL}
 402   , {"-9223372036854775808", -(9223372036854775807LL) - 1}
 403   , {"042", 34}
 404   , {"0x42", 66}
 405   , {"0b101010", 42}
 406   , {"-042", -34}
 407   , {"-0x42", -66}
 408   , {"-0b101010", -42}
 409   };
 410
 411 TEST(StringRefTest, getAsInteger) {
 412   uint8_t U8;
 413   uint16_t U16;
 414   uint32_t U32;
 415   uint64_t U64;
 416
 417   for (size_t i = 0; i < array_lengthof(Unsigned); ++i) {
 418     bool U8Success = StringRef(Unsigned[i].Str).getAsInteger(0, U8);
 419     if (static_cast<uint8_t>(Unsigned[i].Expected) == Unsigned[i].Expected) {
 420       ASSERT_FALSE(U8Success);
 421       EXPECT_EQ(U8, Unsigned[i].Expected);
 422     } else {
 423       ASSERT_TRUE(U8Success);
 424     }
 425     bool U16Success = StringRef(Unsigned[i].Str).getAsInteger(0, U16);
 426     if (static_cast<uint16_t>(Unsigned[i].Expected) == Unsigned[i].Expected) {
 427       ASSERT_FALSE(U16Success);
 428       EXPECT_EQ(U16, Unsigned[i].Expected);
 429     } else {
 430       ASSERT_TRUE(U16Success);
 431     }
 432     bool U32Success = StringRef(Unsigned[i].Str).getAsInteger(0, U32);
 433     if (static_cast<uint32_t>(Unsigned[i].Expected) == Unsigned[i].Expected) {
 434       ASSERT_FALSE(U32Success);
 435       EXPECT_EQ(U32, Unsigned[i].Expected);
 436     } else {
 437       ASSERT_TRUE(U32Success);
 438     }
 439     bool U64Success = StringRef(Unsigned[i].Str).getAsInteger(0, U64);
 440     if (static_cast<uint64_t>(Unsigned[i].Expected) == Unsigned[i].Expected) {
 441       ASSERT_FALSE(U64Success);
 442       EXPECT_EQ(U64, Unsigned[i].Expected);
 443     } else {
 444       ASSERT_TRUE(U64Success);
 445     }
 446   }
 447
 448   int8_t S8;
 449   int16_t S16;
 450   int32_t S32;
 451   int64_t S64;
 452
 453   for (size_t i = 0; i < array_lengthof(Signed); ++i) {
 454     bool S8Success = StringRef(Signed[i].Str).getAsInteger(0, S8);
 455     if (static_cast<int8_t>(Signed[i].Expected) == Signed[i].Expected) {
 456       ASSERT_FALSE(S8Success);
 457       EXPECT_EQ(S8, Signed[i].Expected);
 458     } else {
 459       ASSERT_TRUE(S8Success);
 460     }
 461     bool S16Success = StringRef(Signed[i].Str).getAsInteger(0, S16);
 462     if (static_cast<int16_t>(Signed[i].Expected) == Signed[i].Expected) {
 463       ASSERT_FALSE(S16Success);
 464       EXPECT_EQ(S16, Signed[i].Expected);
 465     } else {
 466       ASSERT_TRUE(S16Success);
 467     }
 468     bool S32Success = StringRef(Signed[i].Str).getAsInteger(0, S32);
 469     if (static_cast<int32_t>(Signed[i].Expected) == Signed[i].Expected) {
 470       ASSERT_FALSE(S32Success);
 471       EXPECT_EQ(S32, Signed[i].Expected);
 472     } else {
 473       ASSERT_TRUE(S32Success);
 474     }
 475     bool S64Success = StringRef(Signed[i].Str).getAsInteger(0, S64);
 476     if (static_cast<int64_t>(Signed[i].Expected) == Signed[i].Expected) {
 477       ASSERT_FALSE(S64Success);
 478       EXPECT_EQ(S64, Signed[i].Expected);
 479     } else {
 480       ASSERT_TRUE(S64Success);
 481     }
 482   }
 483 }
 484
 485
 486 static const char* BadStrings[] = {
 487     "18446744073709551617"  // value just over max
 488   , "123456789012345678901" // value way too large
 489   , "4t23v"                 // illegal decimal characters
 490   , "0x123W56"              // illegal hex characters
 491   , "0b2"                   // illegal bin characters
 492   , "08"                    // illegal oct characters
 493   , "0o8"                   // illegal oct characters
 494   , "-123"                  // negative unsigned value
 495 };
 496
 497
 498 TEST(StringRefTest, getAsUnsignedIntegerBadStrings) {
 499   unsigned long long U64;
 500   for (size_t i = 0; i < array_lengthof(BadStrings); ++i) {
 501     bool IsBadNumber = StringRef(BadStrings[i]).getAsInteger(0, U64);
 502     ASSERT_TRUE(IsBadNumber);
 503   }
 504 }
 505
 506 static const char *join_input[] = { "a", "b", "c" };
 507 static const char join_result1[] = "a";
 508 static const char join_result2[] = "a:b:c";
 509 static const char join_result3[] = "a::b::c";
 510
 511 TEST(StringRefTest, joinStrings) {
 512   std::vector<StringRef> v1;
 513   std::vector<std::string> v2;
 514   for (size_t i = 0; i < array_lengthof(join_input); ++i) {
 515     v1.push_back(join_input[i]);
 516     v2.push_back(join_input[i]);
 517   }
 518
 519   bool v1_join1 = join(v1.begin(), v1.begin() + 1, ":") == join_result1;
 520   EXPECT_TRUE(v1_join1);
 521   bool v1_join2 = join(v1.begin(), v1.end(), ":") == join_result2;
 522   EXPECT_TRUE(v1_join2);
 523   bool v1_join3 = join(v1.begin(), v1.end(), "::") == join_result3;
 524   EXPECT_TRUE(v1_join3);
 525
 526   bool v2_join1 = join(v2.begin(), v2.begin() + 1, ":") == join_result1;
 527   EXPECT_TRUE(v2_join1);
 528   bool v2_join2 = join(v2.begin(), v2.end(), ":") == join_result2;
 529   EXPECT_TRUE(v2_join2);
 530   bool v2_join3 = join(v2.begin(), v2.end(), "::") == join_result3;
 531   EXPECT_TRUE(v2_join3);
 532 }
 533
 534 } // end anonymous namespace