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/SmallVector.h"
  13 #include "llvm/Support/raw_ostream.h"
  14 using namespace llvm;
  15
  16 namespace llvm {
  17
  18 std::ostream &operator<<(std::ostream &OS, const StringRef &S) {
  19   OS << S.str();
  20   return OS;
  21 }
  22
  23 std::ostream &operator<<(std::ostream &OS,
  24                          const std::pair<StringRef, StringRef> &P) {
  25   OS << "(" << P.first << ", " << P.second << ")";
  26   return OS;
  27 }
  28
  29 }
  30
  31 namespace {
  32 TEST(StringRefTest, Construction) {
  33   EXPECT_EQ("", StringRef());
  34   EXPECT_EQ("hello", StringRef("hello"));
  35   EXPECT_EQ("hello", StringRef("hello world", 5));
  36   EXPECT_EQ("hello", StringRef(std::string("hello")));
  37 }
  38
  39 TEST(StringRefTest, Iteration) {
  40   StringRef S("hello");
  41   const char *p = "hello";
  42   for (const char *it = S.begin(), *ie = S.end(); it != ie; ++it, ++p)
  43     EXPECT_EQ(*it, *p);
  44 }
  45
  46 TEST(StringRefTest, StringOps) {
  47   const char *p = "hello";
  48   EXPECT_EQ(p, StringRef(p, 0).data());
  49   EXPECT_TRUE(StringRef().empty());
  50   EXPECT_EQ((size_t) 5, StringRef("hello").size());
  51   EXPECT_EQ(-1, StringRef("aab").compare("aad"));
  52   EXPECT_EQ( 0, StringRef("aab").compare("aab"));
  53   EXPECT_EQ( 1, StringRef("aab").compare("aaa"));
  54   EXPECT_EQ(-1, StringRef("aab").compare("aabb"));
  55   EXPECT_EQ( 1, StringRef("aab").compare("aa"));
  56   EXPECT_EQ( 1, StringRef("\xFF").compare("\1"));
  57
  58   EXPECT_EQ(-1, StringRef("aab").compare("aad", 3));
  59   EXPECT_EQ( 0, StringRef("aab").compare("aab", 3));
  60   EXPECT_EQ( 1, StringRef("aab").compare("aaa", 3));
  61   EXPECT_EQ(-1, StringRef("aab").compare("aabb", 4));
  62   EXPECT_EQ( 1, StringRef("aab").compare("aa", 3));
  63   EXPECT_EQ( 1, StringRef("\xFF").compare("\1", 3));
  64   EXPECT_EQ( 0, StringRef("aab").compare("aad", 2));
  65   EXPECT_EQ( 0, StringRef("aab").compare("aab", 2));
  66   EXPECT_EQ( 0, StringRef("aab").compare("aab", 4));
  67   EXPECT_EQ( 0, StringRef("aab").compare("aaa", 2));
  68   EXPECT_EQ( 0, StringRef("aab").compare("aabb", 3));
  69   EXPECT_EQ( 0, StringRef("aab").compare("aa", 2));
  70
  71   EXPECT_EQ(-1, StringRef("AaB").compare_lower("aAd"));
  72   EXPECT_EQ( 0, StringRef("AaB").compare_lower("aab"));
  73   EXPECT_EQ( 1, StringRef("AaB").compare_lower("AAA"));
  74   EXPECT_EQ(-1, StringRef("AaB").compare_lower("aaBb"));
  75   EXPECT_EQ( 1, StringRef("AaB").compare_lower("aA"));
  76   EXPECT_EQ( 1, StringRef("\xFF").compare_lower("\1"));
  77
  78   EXPECT_EQ(-1, StringRef("aab").compare_numeric("aad"));
  79   EXPECT_EQ( 0, StringRef("aab").compare_numeric("aab"));
  80   EXPECT_EQ( 1, StringRef("aab").compare_numeric("aaa"));
  81   EXPECT_EQ(-1, StringRef("aab").compare_numeric("aabb"));
  82   EXPECT_EQ( 1, StringRef("aab").compare_numeric("aa"));
  83   EXPECT_EQ(-1, StringRef("1").compare_numeric("10"));
  84   EXPECT_EQ( 0, StringRef("10").compare_numeric("10"));
  85   EXPECT_EQ( 0, StringRef("10a").compare_numeric("10a"));
  86   EXPECT_EQ( 1, StringRef("2").compare_numeric("1"));
  87   EXPECT_EQ( 0, StringRef("llvm_v1i64_ty").compare_numeric("llvm_v1i64_ty"));
  88   EXPECT_EQ( 1, StringRef("\xFF").compare_numeric("\1"));
  89 }
  90
  91 TEST(StringRefTest, Operators) {
  92   EXPECT_EQ("", StringRef());
  93   EXPECT_TRUE(StringRef("aab") < StringRef("aad"));
  94   EXPECT_FALSE(StringRef("aab") < StringRef("aab"));
  95   EXPECT_TRUE(StringRef("aab") <= StringRef("aab"));
  96   EXPECT_FALSE(StringRef("aab") <= StringRef("aaa"));
  97   EXPECT_TRUE(StringRef("aad") > StringRef("aab"));
  98   EXPECT_FALSE(StringRef("aab") > StringRef("aab"));
  99   EXPECT_TRUE(StringRef("aab") >= StringRef("aab"));
 100   EXPECT_FALSE(StringRef("aaa") >= StringRef("aab"));
 101   EXPECT_EQ(StringRef("aab"), StringRef("aab"));
 102   EXPECT_FALSE(StringRef("aab") == StringRef("aac"));
 103   EXPECT_FALSE(StringRef("aab") != StringRef("aab"));
 104   EXPECT_TRUE(StringRef("aab") != StringRef("aac"));
 105   EXPECT_EQ('a', StringRef("aab")[1]);
 106 }
 107
 108 TEST(StringRefTest, Substr) {
 109   StringRef Str("hello");
 110   EXPECT_EQ("lo", Str.substr(3));
 111   EXPECT_EQ("", Str.substr(100));
 112   EXPECT_EQ("hello", Str.substr(0, 100));
 113   EXPECT_EQ("o", Str.substr(4, 10));
 114 }
 115
 116 TEST(StringRefTest, Slice) {
 117   StringRef Str("hello");
 118   EXPECT_EQ("l", Str.slice(2, 3));
 119   EXPECT_EQ("ell", Str.slice(1, 4));
 120   EXPECT_EQ("llo", Str.slice(2, 100));
 121   EXPECT_EQ("", Str.slice(2, 1));
 122   EXPECT_EQ("", Str.slice(10, 20));
 123 }
 124
 125 TEST(StringRefTest, Split) {
 126   StringRef Str("hello");
 127   EXPECT_EQ(std::make_pair(StringRef("hello"), StringRef("")),
 128             Str.split('X'));
 129   EXPECT_EQ(std::make_pair(StringRef("h"), StringRef("llo")),
 130             Str.split('e'));
 131   EXPECT_EQ(std::make_pair(StringRef(""), StringRef("ello")),
 132             Str.split('h'));
 133   EXPECT_EQ(std::make_pair(StringRef("he"), StringRef("lo")),
 134             Str.split('l'));
 135   EXPECT_EQ(std::make_pair(StringRef("hell"), StringRef("")),
 136             Str.split('o'));
 137
 138   EXPECT_EQ(std::make_pair(StringRef("hello"), StringRef("")),
 139             Str.rsplit('X'));
 140   EXPECT_EQ(std::make_pair(StringRef("h"), StringRef("llo")),
 141             Str.rsplit('e'));
 142   EXPECT_EQ(std::make_pair(StringRef(""), StringRef("ello")),
 143             Str.rsplit('h'));
 144   EXPECT_EQ(std::make_pair(StringRef("hel"), StringRef("o")),
 145             Str.rsplit('l'));
 146   EXPECT_EQ(std::make_pair(StringRef("hell"), StringRef("")),
 147             Str.rsplit('o'));
 148 }
 149
 150 TEST(StringRefTest, Split2) {
 151   SmallVector<StringRef, 5> parts;
 152   SmallVector<StringRef, 5> expected;
 153
 154   expected.push_back("ab"); expected.push_back("c");
 155   StringRef(",ab,,c,").split(parts, ",", -1, false);
 156   EXPECT_TRUE(parts == expected);
 157
 158   expected.clear(); parts.clear();
 159   expected.push_back(""); expected.push_back("ab"); expected.push_back("");
 160   expected.push_back("c"); expected.push_back("");
 161   StringRef(",ab,,c,").split(parts, ",", -1, true);
 162   EXPECT_TRUE(parts == expected);
 163
 164   expected.clear(); parts.clear();
 165   expected.push_back("");
 166   StringRef("").split(parts, ",", -1, true);
 167   EXPECT_TRUE(parts == expected);
 168
 169   expected.clear(); parts.clear();
 170   StringRef("").split(parts, ",", -1, false);
 171   EXPECT_TRUE(parts == expected);
 172
 173   expected.clear(); parts.clear();
 174   StringRef(",").split(parts, ",", -1, false);
 175   EXPECT_TRUE(parts == expected);
 176
 177   expected.clear(); parts.clear();
 178   expected.push_back(""); expected.push_back("");
 179   StringRef(",").split(parts, ",", -1, true);
 180   EXPECT_TRUE(parts == expected);
 181
 182   expected.clear(); parts.clear();
 183   expected.push_back("a"); expected.push_back("b");
 184   StringRef("a,b").split(parts, ",", -1, true);
 185   EXPECT_TRUE(parts == expected);
 186
 187   // Test MaxSplit
 188   expected.clear(); parts.clear();
 189   expected.push_back("a,,b,c");
 190   StringRef("a,,b,c").split(parts, ",", 0, true);
 191   EXPECT_TRUE(parts == expected);
 192
 193   expected.clear(); parts.clear();
 194   expected.push_back("a,,b,c");
 195   StringRef("a,,b,c").split(parts, ",", 0, false);
 196   EXPECT_TRUE(parts == expected);
 197
 198   expected.clear(); parts.clear();
 199   expected.push_back("a"); expected.push_back(",b,c");
 200   StringRef("a,,b,c").split(parts, ",", 1, true);
 201   EXPECT_TRUE(parts == expected);
 202
 203   expected.clear(); parts.clear();
 204   expected.push_back("a"); expected.push_back(",b,c");
 205   StringRef("a,,b,c").split(parts, ",", 1, false);
 206   EXPECT_TRUE(parts == expected);
 207
 208   expected.clear(); parts.clear();
 209   expected.push_back("a"); expected.push_back(""); expected.push_back("b,c");
 210   StringRef("a,,b,c").split(parts, ",", 2, true);
 211   EXPECT_TRUE(parts == expected);
 212
 213   expected.clear(); parts.clear();
 214   expected.push_back("a"); expected.push_back("b,c");
 215   StringRef("a,,b,c").split(parts, ",", 2, false);
 216   EXPECT_TRUE(parts == expected);
 217
 218   expected.clear(); parts.clear();
 219   expected.push_back("a"); expected.push_back(""); expected.push_back("b");
 220   expected.push_back("c");
 221   StringRef("a,,b,c").split(parts, ",", 3, true);
 222   EXPECT_TRUE(parts == expected);
 223
 224   expected.clear(); parts.clear();
 225   expected.push_back("a"); expected.push_back("b"); expected.push_back("c");
 226   StringRef("a,,b,c").split(parts, ",", 3, false);
 227   EXPECT_TRUE(parts == expected);
 228 }
 229
 230 TEST(StringRefTest, StartsWith) {
 231   StringRef Str("hello");
 232   EXPECT_TRUE(Str.startswith("he"));
 233   EXPECT_FALSE(Str.startswith("helloworld"));
 234   EXPECT_FALSE(Str.startswith("hi"));
 235 }
 236
 237 TEST(StringRefTest, EndsWith) {
 238   StringRef Str("hello");
 239   EXPECT_TRUE(Str.endswith("lo"));
 240   EXPECT_FALSE(Str.endswith("helloworld"));
 241   EXPECT_FALSE(Str.endswith("worldhello"));
 242   EXPECT_FALSE(Str.endswith("so"));
 243 }
 244
 245 TEST(StringRefTest, Find) {
 246   StringRef Str("hello");
 247   EXPECT_EQ(2U, Str.find('l'));
 248   EXPECT_EQ(StringRef::npos, Str.find('z'));
 249   EXPECT_EQ(StringRef::npos, Str.find("helloworld"));
 250   EXPECT_EQ(0U, Str.find("hello"));
 251   EXPECT_EQ(1U, Str.find("ello"));
 252   EXPECT_EQ(StringRef::npos, Str.find("zz"));
 253   EXPECT_EQ(2U, Str.find("ll", 2));
 254   EXPECT_EQ(StringRef::npos, Str.find("ll", 3));
 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 } // end anonymous namespace