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