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