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_lower("aAd"));
  59   EXPECT_EQ( 0, StringRef("AaB").compare_lower("aab"));
  60   EXPECT_EQ( 1, StringRef("AaB").compare_lower("AAA"));
  61   EXPECT_EQ(-1, StringRef("AaB").compare_lower("aaBb"));
  62   EXPECT_EQ( 1, StringRef("AaB").compare_lower("aA"));
  63   EXPECT_EQ( 1, StringRef("\xFF").compare_lower("\1"));
  64
  65   EXPECT_EQ(-1, StringRef("aab").compare_numeric("aad"));
  66   EXPECT_EQ( 0, StringRef("aab").compare_numeric("aab"));
  67   EXPECT_EQ( 1, StringRef("aab").compare_numeric("aaa"));
  68   EXPECT_EQ(-1, StringRef("aab").compare_numeric("aabb"));
  69   EXPECT_EQ( 1, StringRef("aab").compare_numeric("aa"));
  70   EXPECT_EQ(-1, StringRef("1").compare_numeric("10"));
  71   EXPECT_EQ( 0, StringRef("10").compare_numeric("10"));
  72   EXPECT_EQ( 0, StringRef("10a").compare_numeric("10a"));
  73   EXPECT_EQ( 1, StringRef("2").compare_numeric("1"));
  74   EXPECT_EQ( 0, StringRef("llvm_v1i64_ty").compare_numeric("llvm_v1i64_ty"));
  75   EXPECT_EQ( 1, StringRef("\xFF").compare_numeric("\1"));
  76 }
  77
  78 TEST(StringRefTest, Operators) {
  79   EXPECT_EQ("", StringRef());
  80   EXPECT_TRUE(StringRef("aab") < StringRef("aad"));
  81   EXPECT_FALSE(StringRef("aab") < StringRef("aab"));
  82   EXPECT_TRUE(StringRef("aab") <= StringRef("aab"));
  83   EXPECT_FALSE(StringRef("aab") <= StringRef("aaa"));
  84   EXPECT_TRUE(StringRef("aad") > StringRef("aab"));
  85   EXPECT_FALSE(StringRef("aab") > StringRef("aab"));
  86   EXPECT_TRUE(StringRef("aab") >= StringRef("aab"));
  87   EXPECT_FALSE(StringRef("aaa") >= StringRef("aab"));
  88   EXPECT_EQ(StringRef("aab"), StringRef("aab"));
  89   EXPECT_FALSE(StringRef("aab") == StringRef("aac"));
  90   EXPECT_FALSE(StringRef("aab") != StringRef("aab"));
  91   EXPECT_TRUE(StringRef("aab") != StringRef("aac"));
  92   EXPECT_EQ('a', StringRef("aab")[1]);
  93 }
  94
  95 TEST(StringRefTest, Substr) {
  96   StringRef Str("hello");
  97   EXPECT_EQ("lo", Str.substr(3));
  98   EXPECT_EQ("", Str.substr(100));
  99   EXPECT_EQ("hello", Str.substr(0, 100));
 100   EXPECT_EQ("o", Str.substr(4, 10));
 101 }
 102
 103 TEST(StringRefTest, Slice) {
 104   StringRef Str("hello");
 105   EXPECT_EQ("l", Str.slice(2, 3));
 106   EXPECT_EQ("ell", Str.slice(1, 4));
 107   EXPECT_EQ("llo", Str.slice(2, 100));
 108   EXPECT_EQ("", Str.slice(2, 1));
 109   EXPECT_EQ("", Str.slice(10, 20));
 110 }
 111
 112 TEST(StringRefTest, Split) {
 113   StringRef Str("hello");
 114   EXPECT_EQ(std::make_pair(StringRef("hello"), StringRef("")),
 115             Str.split('X'));
 116   EXPECT_EQ(std::make_pair(StringRef("h"), StringRef("llo")),
 117             Str.split('e'));
 118   EXPECT_EQ(std::make_pair(StringRef(""), StringRef("ello")),
 119             Str.split('h'));
 120   EXPECT_EQ(std::make_pair(StringRef("he"), StringRef("lo")),
 121             Str.split('l'));
 122   EXPECT_EQ(std::make_pair(StringRef("hell"), StringRef("")),
 123             Str.split('o'));
 124
 125   EXPECT_EQ(std::make_pair(StringRef("hello"), StringRef("")),
 126             Str.rsplit('X'));
 127   EXPECT_EQ(std::make_pair(StringRef("h"), StringRef("llo")),
 128             Str.rsplit('e'));
 129   EXPECT_EQ(std::make_pair(StringRef(""), StringRef("ello")),
 130             Str.rsplit('h'));
 131   EXPECT_EQ(std::make_pair(StringRef("hel"), StringRef("o")),
 132             Str.rsplit('l'));
 133   EXPECT_EQ(std::make_pair(StringRef("hell"), StringRef("")),
 134             Str.rsplit('o'));
 135 }
 136
 137 TEST(StringRefTest, Split2) {
 138   SmallVector<StringRef, 5> parts;
 139   SmallVector<StringRef, 5> expected;
 140
 141   expected.push_back("ab"); expected.push_back("c");
 142   StringRef(",ab,,c,").split(parts, ",", -1, false);
 143   EXPECT_TRUE(parts == expected);
 144
 145   expected.clear(); parts.clear();
 146   expected.push_back(""); expected.push_back("ab"); expected.push_back("");
 147   expected.push_back("c"); expected.push_back("");
 148   StringRef(",ab,,c,").split(parts, ",", -1, true);
 149   EXPECT_TRUE(parts == expected);
 150
 151   expected.clear(); parts.clear();
 152   expected.push_back("");
 153   StringRef("").split(parts, ",", -1, true);
 154   EXPECT_TRUE(parts == expected);
 155
 156   expected.clear(); parts.clear();
 157   StringRef("").split(parts, ",", -1, false);
 158   EXPECT_TRUE(parts == expected);
 159
 160   expected.clear(); parts.clear();
 161   StringRef(",").split(parts, ",", -1, false);
 162   EXPECT_TRUE(parts == expected);
 163
 164   expected.clear(); parts.clear();
 165   expected.push_back(""); expected.push_back("");
 166   StringRef(",").split(parts, ",", -1, true);
 167   EXPECT_TRUE(parts == expected);
 168
 169   expected.clear(); parts.clear();
 170   expected.push_back("a"); expected.push_back("b");
 171   StringRef("a,b").split(parts, ",", -1, true);
 172   EXPECT_TRUE(parts == expected);
 173
 174   // Test MaxSplit
 175   expected.clear(); parts.clear();
 176   expected.push_back("a,,b,c");
 177   StringRef("a,,b,c").split(parts, ",", 0, true);
 178   EXPECT_TRUE(parts == expected);
 179
 180   expected.clear(); parts.clear();
 181   expected.push_back("a,,b,c");
 182   StringRef("a,,b,c").split(parts, ",", 0, false);
 183   EXPECT_TRUE(parts == expected);
 184
 185   expected.clear(); parts.clear();
 186   expected.push_back("a"); expected.push_back(",b,c");
 187   StringRef("a,,b,c").split(parts, ",", 1, true);
 188   EXPECT_TRUE(parts == expected);
 189
 190   expected.clear(); parts.clear();
 191   expected.push_back("a"); expected.push_back(",b,c");
 192   StringRef("a,,b,c").split(parts, ",", 1, false);
 193   EXPECT_TRUE(parts == expected);
 194
 195   expected.clear(); parts.clear();
 196   expected.push_back("a"); expected.push_back(""); expected.push_back("b,c");
 197   StringRef("a,,b,c").split(parts, ",", 2, true);
 198   EXPECT_TRUE(parts == expected);
 199
 200   expected.clear(); parts.clear();
 201   expected.push_back("a"); expected.push_back("b,c");
 202   StringRef("a,,b,c").split(parts, ",", 2, false);
 203   EXPECT_TRUE(parts == expected);
 204
 205   expected.clear(); parts.clear();
 206   expected.push_back("a"); expected.push_back(""); expected.push_back("b");
 207   expected.push_back("c");
 208   StringRef("a,,b,c").split(parts, ",", 3, true);
 209   EXPECT_TRUE(parts == expected);
 210
 211   expected.clear(); parts.clear();
 212   expected.push_back("a"); expected.push_back("b"); expected.push_back("c");
 213   StringRef("a,,b,c").split(parts, ",", 3, false);
 214   EXPECT_TRUE(parts == expected);
 215 }
 216
 217 TEST(StringRefTest, StartsWith) {
 218   StringRef Str("hello");
 219   EXPECT_TRUE(Str.startswith("he"));
 220   EXPECT_FALSE(Str.startswith("helloworld"));
 221   EXPECT_FALSE(Str.startswith("hi"));
 222 }
 223
 224 TEST(StringRefTest, EndsWith) {
 225   StringRef Str("hello");
 226   EXPECT_TRUE(Str.endswith("lo"));
 227   EXPECT_FALSE(Str.endswith("helloworld"));
 228   EXPECT_FALSE(Str.endswith("worldhello"));
 229   EXPECT_FALSE(Str.endswith("so"));
 230 }
 231
 232 TEST(StringRefTest, Find) {
 233   StringRef Str("hello");
 234   EXPECT_EQ(2U, Str.find('l'));
 235   EXPECT_EQ(StringRef::npos, Str.find('z'));
 236   EXPECT_EQ(StringRef::npos, Str.find("helloworld"));
 237   EXPECT_EQ(0U, Str.find("hello"));
 238   EXPECT_EQ(1U, Str.find("ello"));
 239   EXPECT_EQ(StringRef::npos, Str.find("zz"));
 240   EXPECT_EQ(2U, Str.find("ll", 2));
 241   EXPECT_EQ(StringRef::npos, Str.find("ll", 3));
 242
 243   EXPECT_EQ(3U, Str.rfind('l'));
 244   EXPECT_EQ(StringRef::npos, Str.rfind('z'));
 245   EXPECT_EQ(StringRef::npos, Str.rfind("helloworld"));
 246   EXPECT_EQ(0U, Str.rfind("hello"));
 247   EXPECT_EQ(1U, Str.rfind("ello"));
 248   EXPECT_EQ(StringRef::npos, Str.rfind("zz"));
 249
 250   EXPECT_EQ(2U, Str.find_first_of('l'));
 251   EXPECT_EQ(1U, Str.find_first_of("el"));
 252   EXPECT_EQ(StringRef::npos, Str.find_first_of("xyz"));
 253
 254   EXPECT_EQ(1U, Str.find_first_not_of('h'));
 255   EXPECT_EQ(4U, Str.find_first_not_of("hel"));
 256   EXPECT_EQ(StringRef::npos, Str.find_first_not_of("hello"));
 257 }
 258
 259 TEST(StringRefTest, Count) {
 260   StringRef Str("hello");
 261   EXPECT_EQ(2U, Str.count('l'));
 262   EXPECT_EQ(1U, Str.count('o'));
 263   EXPECT_EQ(0U, Str.count('z'));
 264   EXPECT_EQ(0U, Str.count("helloworld"));
 265   EXPECT_EQ(1U, Str.count("hello"));
 266   EXPECT_EQ(1U, Str.count("ello"));
 267   EXPECT_EQ(0U, Str.count("zz"));
 268 }
 269
 270 TEST(StringRefTest, EditDistance) {
 271   StringRef Str("hello");
 272   EXPECT_EQ(2U, Str.edit_distance("hill"));
 273 }
 274
 275 TEST(StringRefTest, Misc) {
 276   std::string Storage;
 277   raw_string_ostream OS(Storage);
 278   OS << StringRef("hello");
 279   EXPECT_EQ("hello", OS.str());
 280 }
 281
 282 } // end anonymous namespace