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 }
  57
  58 TEST(StringRefTest, Operators) {
  59   EXPECT_EQ("", StringRef());
  60   EXPECT_TRUE(StringRef("aab") < StringRef("aad"));
  61   EXPECT_FALSE(StringRef("aab") < StringRef("aab"));
  62   EXPECT_TRUE(StringRef("aab") <= StringRef("aab"));
  63   EXPECT_FALSE(StringRef("aab") <= StringRef("aaa"));
  64   EXPECT_TRUE(StringRef("aad") > StringRef("aab"));
  65   EXPECT_FALSE(StringRef("aab") > StringRef("aab"));
  66   EXPECT_TRUE(StringRef("aab") >= StringRef("aab"));
  67   EXPECT_FALSE(StringRef("aaa") >= StringRef("aab"));
  68   EXPECT_EQ(StringRef("aab"), StringRef("aab"));
  69   EXPECT_FALSE(StringRef("aab") == StringRef("aac"));
  70   EXPECT_FALSE(StringRef("aab") != StringRef("aab"));
  71   EXPECT_TRUE(StringRef("aab") != StringRef("aac"));
  72   EXPECT_EQ('a', StringRef("aab")[1]);
  73 }
  74
  75 TEST(StringRefTest, Substr) {
  76   StringRef Str("hello");
  77   EXPECT_EQ("lo", Str.substr(3));
  78   EXPECT_EQ("", Str.substr(100));
  79   EXPECT_EQ("hello", Str.substr(0, 100));
  80   EXPECT_EQ("o", Str.substr(4, 10));
  81 }
  82
  83 TEST(StringRefTest, Slice) {
  84   StringRef Str("hello");
  85   EXPECT_EQ("l", Str.slice(2, 3));
  86   EXPECT_EQ("ell", Str.slice(1, 4));
  87   EXPECT_EQ("llo", Str.slice(2, 100));
  88   EXPECT_EQ("", Str.slice(2, 1));
  89   EXPECT_EQ("", Str.slice(10, 20));
  90 }
  91
  92 TEST(StringRefTest, Split) {
  93   StringRef Str("hello");
  94   EXPECT_EQ(std::make_pair(StringRef("hello"), StringRef("")),
  95             Str.split('X'));
  96   EXPECT_EQ(std::make_pair(StringRef("h"), StringRef("llo")),
  97             Str.split('e'));
  98   EXPECT_EQ(std::make_pair(StringRef(""), StringRef("ello")),
  99             Str.split('h'));
 100   EXPECT_EQ(std::make_pair(StringRef("he"), StringRef("lo")),
 101             Str.split('l'));
 102   EXPECT_EQ(std::make_pair(StringRef("hell"), StringRef("")),
 103             Str.split('o'));
 104
 105   EXPECT_EQ(std::make_pair(StringRef("hello"), StringRef("")),
 106             Str.rsplit('X'));
 107   EXPECT_EQ(std::make_pair(StringRef("h"), StringRef("llo")),
 108             Str.rsplit('e'));
 109   EXPECT_EQ(std::make_pair(StringRef(""), StringRef("ello")),
 110             Str.rsplit('h'));
 111   EXPECT_EQ(std::make_pair(StringRef("hel"), StringRef("o")),
 112             Str.rsplit('l'));
 113   EXPECT_EQ(std::make_pair(StringRef("hell"), StringRef("")),
 114             Str.rsplit('o'));
 115 }
 116
 117 TEST(StringRefTest, Split2) {
 118   SmallVector<StringRef, 5> parts;
 119   SmallVector<StringRef, 5> expected;
 120
 121   expected.push_back("ab"); expected.push_back("c");
 122   StringRef(",ab,,c,").split(parts, ",", -1, false);
 123   EXPECT_TRUE(parts == expected);
 124
 125   expected.clear(); parts.clear();
 126   expected.push_back(""); expected.push_back("ab"); expected.push_back("");
 127   expected.push_back("c"); expected.push_back("");
 128   StringRef(",ab,,c,").split(parts, ",", -1, true);
 129   EXPECT_TRUE(parts == expected);
 130
 131   expected.clear(); parts.clear();
 132   expected.push_back("");
 133   StringRef("").split(parts, ",", -1, true);
 134   EXPECT_TRUE(parts == expected);
 135
 136   expected.clear(); parts.clear();
 137   StringRef("").split(parts, ",", -1, false);
 138   EXPECT_TRUE(parts == expected);
 139
 140   expected.clear(); parts.clear();
 141   StringRef(",").split(parts, ",", -1, false);
 142   EXPECT_TRUE(parts == expected);
 143
 144   expected.clear(); parts.clear();
 145   expected.push_back(""); expected.push_back("");
 146   StringRef(",").split(parts, ",", -1, true);
 147   EXPECT_TRUE(parts == expected);
 148
 149   expected.clear(); parts.clear();
 150   expected.push_back("a"); expected.push_back("b");
 151   StringRef("a,b").split(parts, ",", -1, true);
 152   EXPECT_TRUE(parts == expected);
 153
 154   // Test MaxSplit
 155   expected.clear(); parts.clear();
 156   expected.push_back("a,,b,c");
 157   StringRef("a,,b,c").split(parts, ",", 0, true);
 158   EXPECT_TRUE(parts == expected);
 159
 160   expected.clear(); parts.clear();
 161   expected.push_back("a,,b,c");
 162   StringRef("a,,b,c").split(parts, ",", 0, false);
 163   EXPECT_TRUE(parts == expected);
 164
 165   expected.clear(); parts.clear();
 166   expected.push_back("a"); expected.push_back(",b,c");
 167   StringRef("a,,b,c").split(parts, ",", 1, true);
 168   EXPECT_TRUE(parts == expected);
 169
 170   expected.clear(); parts.clear();
 171   expected.push_back("a"); expected.push_back(",b,c");
 172   StringRef("a,,b,c").split(parts, ",", 1, false);
 173   EXPECT_TRUE(parts == expected);
 174
 175   expected.clear(); parts.clear();
 176   expected.push_back("a"); expected.push_back(""); expected.push_back("b,c");
 177   StringRef("a,,b,c").split(parts, ",", 2, true);
 178   EXPECT_TRUE(parts == expected);
 179
 180   expected.clear(); parts.clear();
 181   expected.push_back("a"); expected.push_back("b,c");
 182   StringRef("a,,b,c").split(parts, ",", 2, false);
 183   EXPECT_TRUE(parts == expected);
 184
 185   expected.clear(); parts.clear();
 186   expected.push_back("a"); expected.push_back(""); expected.push_back("b");
 187   expected.push_back("c");
 188   StringRef("a,,b,c").split(parts, ",", 3, true);
 189   EXPECT_TRUE(parts == expected);
 190
 191   expected.clear(); parts.clear();
 192   expected.push_back("a"); expected.push_back("b"); expected.push_back("c");
 193   StringRef("a,,b,c").split(parts, ",", 3, false);
 194   EXPECT_TRUE(parts == expected);
 195 }
 196
 197 TEST(StringRefTest, StartsWith) {
 198   StringRef Str("hello");
 199   EXPECT_TRUE(Str.startswith("he"));
 200   EXPECT_FALSE(Str.startswith("helloworld"));
 201   EXPECT_FALSE(Str.startswith("hi"));
 202 }
 203
 204 TEST(StringRefTest, EndsWith) {
 205   StringRef Str("hello");
 206   EXPECT_TRUE(Str.endswith("lo"));
 207   EXPECT_FALSE(Str.endswith("helloworld"));
 208   EXPECT_FALSE(Str.endswith("worldhello"));
 209   EXPECT_FALSE(Str.endswith("so"));
 210 }
 211
 212 TEST(StringRefTest, Find) {
 213   StringRef Str("hello");
 214   EXPECT_EQ(2U, Str.find('l'));
 215   EXPECT_EQ(StringRef::npos, Str.find('z'));
 216   EXPECT_EQ(StringRef::npos, Str.find("helloworld"));
 217   EXPECT_EQ(0U, Str.find("hello"));
 218   EXPECT_EQ(1U, Str.find("ello"));
 219   EXPECT_EQ(StringRef::npos, Str.find("zz"));
 220   EXPECT_EQ(2U, Str.find("ll", 2));
 221   EXPECT_EQ(StringRef::npos, Str.find("ll", 3));
 222
 223   EXPECT_EQ(3U, Str.rfind('l'));
 224   EXPECT_EQ(StringRef::npos, Str.rfind('z'));
 225   EXPECT_EQ(StringRef::npos, Str.rfind("helloworld"));
 226   EXPECT_EQ(0U, Str.rfind("hello"));
 227   EXPECT_EQ(1U, Str.rfind("ello"));
 228   EXPECT_EQ(StringRef::npos, Str.rfind("zz"));
 229
 230   EXPECT_EQ(2U, Str.find_first_of('l'));
 231   EXPECT_EQ(1U, Str.find_first_of("el"));
 232   EXPECT_EQ(StringRef::npos, Str.find_first_of("xyz"));
 233
 234   EXPECT_EQ(1U, Str.find_first_not_of('h'));
 235   EXPECT_EQ(4U, Str.find_first_not_of("hel"));
 236   EXPECT_EQ(StringRef::npos, Str.find_first_not_of("hello"));
 237 }
 238
 239 TEST(StringRefTest, Count) {
 240   StringRef Str("hello");
 241   EXPECT_EQ(2U, Str.count('l'));
 242   EXPECT_EQ(1U, Str.count('o'));
 243   EXPECT_EQ(0U, Str.count('z'));
 244   EXPECT_EQ(0U, Str.count("helloworld"));
 245   EXPECT_EQ(1U, Str.count("hello"));
 246   EXPECT_EQ(1U, Str.count("ello"));
 247   EXPECT_EQ(0U, Str.count("zz"));
 248 }
 249
 250 TEST(StringRefTest, EditDistance) {
 251   StringRef Str("hello");
 252   EXPECT_EQ(2U, Str.edit_distance("hill"));
 253 }
 254
 255 TEST(StringRefTest, Misc) {
 256   std::string Storage;
 257   raw_string_ostream OS(Storage);
 258   OS << StringRef("hello");
 259   EXPECT_EQ("hello", OS.str());
 260 }
 261
 262 } // end anonymous namespace