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