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 {
  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 TEST(StringRefTest, Construction) {
  30   EXPECT_EQ("", StringRef());
  31   EXPECT_EQ("hello", StringRef("hello"));
  32   EXPECT_EQ("hello", StringRef("hello world", 5));
  33   EXPECT_EQ("hello", StringRef(std::string("hello")));
  34 }
  35
  36 TEST(StringRefTest, Iteration) {
  37   StringRef S("hello");
  38   const char *p = "hello";
  39   for (const char *it = S.begin(), *ie = S.end(); it != ie; ++it, ++p)
  40     EXPECT_EQ(*it, *p);
  41 }
  42
  43 TEST(StringRefTest, StringOps) {
  44   const char *p = "hello";
  45   EXPECT_EQ(p, StringRef(p, 0).data());
  46   EXPECT_TRUE(StringRef().empty());
  47   EXPECT_EQ((size_t) 5, StringRef("hello").size());
  48   EXPECT_EQ(-1, StringRef("aab").compare("aad"));
  49   EXPECT_EQ( 0, StringRef("aab").compare("aab"));
  50   EXPECT_EQ( 1, StringRef("aab").compare("aaa"));
  51   EXPECT_EQ(-1, StringRef("aab").compare("aabb"));
  52   EXPECT_EQ( 1, StringRef("aab").compare("aa"));
  53 }
  54
  55 TEST(StringRefTest, Operators) {
  56   EXPECT_EQ("", StringRef());
  57   EXPECT_TRUE(StringRef("aab") < StringRef("aad"));
  58   EXPECT_FALSE(StringRef("aab") < StringRef("aab"));
  59   EXPECT_TRUE(StringRef("aab") <= StringRef("aab"));
  60   EXPECT_FALSE(StringRef("aab") <= StringRef("aaa"));
  61   EXPECT_TRUE(StringRef("aad") > StringRef("aab"));
  62   EXPECT_FALSE(StringRef("aab") > StringRef("aab"));
  63   EXPECT_TRUE(StringRef("aab") >= StringRef("aab"));
  64   EXPECT_FALSE(StringRef("aaa") >= StringRef("aab"));
  65   EXPECT_EQ(StringRef("aab"), StringRef("aab"));
  66   EXPECT_FALSE(StringRef("aab") == StringRef("aac"));
  67   EXPECT_FALSE(StringRef("aab") != StringRef("aab"));
  68   EXPECT_TRUE(StringRef("aab") != StringRef("aac"));
  69   EXPECT_EQ('a', StringRef("aab")[1]);
  70 }
  71
  72 TEST(StringRefTest, Substr) {
  73   StringRef Str("hello");
  74   EXPECT_EQ("lo", Str.substr(3));
  75   EXPECT_EQ("", Str.substr(100));
  76   EXPECT_EQ("hello", Str.substr(0, 100));
  77   EXPECT_EQ("o", Str.substr(4, 10));
  78 }
  79
  80 TEST(StringRefTest, Slice) {
  81   StringRef Str("hello");
  82   EXPECT_EQ("l", Str.slice(2, 3));
  83   EXPECT_EQ("ell", Str.slice(1, 4));
  84   EXPECT_EQ("llo", Str.slice(2, 100));
  85   EXPECT_EQ("", Str.slice(2, 1));
  86   EXPECT_EQ("", Str.slice(10, 20));
  87 }
  88
  89 TEST(StringRefTest, Split) {
  90   StringRef Str("hello");
  91   EXPECT_EQ(std::make_pair(StringRef("hello"), StringRef("")),
  92             Str.split('X'));
  93   EXPECT_EQ(std::make_pair(StringRef("h"), StringRef("llo")),
  94             Str.split('e'));
  95   EXPECT_EQ(std::make_pair(StringRef(""), StringRef("ello")),
  96             Str.split('h'));
  97   EXPECT_EQ(std::make_pair(StringRef("he"), StringRef("lo")),
  98             Str.split('l'));
  99   EXPECT_EQ(std::make_pair(StringRef("hell"), StringRef("")),
 100             Str.split('o'));
 101
 102   EXPECT_EQ(std::make_pair(StringRef("hello"), StringRef("")),
 103             Str.rsplit('X'));
 104   EXPECT_EQ(std::make_pair(StringRef("h"), StringRef("llo")),
 105             Str.rsplit('e'));
 106   EXPECT_EQ(std::make_pair(StringRef(""), StringRef("ello")),
 107             Str.rsplit('h'));
 108   EXPECT_EQ(std::make_pair(StringRef("hel"), StringRef("o")),
 109             Str.rsplit('l'));
 110   EXPECT_EQ(std::make_pair(StringRef("hell"), StringRef("")),
 111             Str.rsplit('o'));
 112 }
 113
 114 TEST(StringRefTest, Split2) {
 115   SmallVector<StringRef, 5> parts;
 116   SmallVector<StringRef, 5> expected;
 117
 118   expected.push_back("ab"); expected.push_back("c");
 119   StringRef(",ab,,c,").split(parts, ",", -1, false);
 120   EXPECT_TRUE(parts == expected);
 121
 122   expected.clear(); parts.clear();
 123   expected.push_back(""); expected.push_back("ab"); expected.push_back("");
 124   expected.push_back("c"); expected.push_back("");
 125   StringRef(",ab,,c,").split(parts, ",", -1, true);
 126   EXPECT_TRUE(parts == expected);
 127
 128   expected.clear(); parts.clear();
 129   expected.push_back("");
 130   StringRef("").split(parts, ",", -1, true);
 131   EXPECT_TRUE(parts == expected);
 132
 133   expected.clear(); parts.clear();
 134   StringRef("").split(parts, ",", -1, false);
 135   EXPECT_TRUE(parts == expected);
 136
 137   expected.clear(); parts.clear();
 138   StringRef(",").split(parts, ",", -1, false);
 139   EXPECT_TRUE(parts == expected);
 140
 141   expected.clear(); parts.clear();
 142   expected.push_back(""); expected.push_back("");
 143   StringRef(",").split(parts, ",", -1, true);
 144   EXPECT_TRUE(parts == expected);
 145
 146   expected.clear(); parts.clear();
 147   expected.push_back("a"); expected.push_back("b");
 148   StringRef("a,b").split(parts, ",", -1, true);
 149   EXPECT_TRUE(parts == expected);
 150
 151   // Test MaxSplit
 152   expected.clear(); parts.clear();
 153   expected.push_back("a,,b,c");
 154   StringRef("a,,b,c").split(parts, ",", 0, true);
 155   EXPECT_TRUE(parts == expected);
 156
 157   expected.clear(); parts.clear();
 158   expected.push_back("a,,b,c");
 159   StringRef("a,,b,c").split(parts, ",", 0, false);
 160   EXPECT_TRUE(parts == expected);
 161
 162   expected.clear(); parts.clear();
 163   expected.push_back("a"); expected.push_back(",b,c");
 164   StringRef("a,,b,c").split(parts, ",", 1, true);
 165   EXPECT_TRUE(parts == expected);
 166
 167   expected.clear(); parts.clear();
 168   expected.push_back("a"); expected.push_back(",b,c");
 169   StringRef("a,,b,c").split(parts, ",", 1, false);
 170   EXPECT_TRUE(parts == expected);
 171
 172   expected.clear(); parts.clear();
 173   expected.push_back("a"); expected.push_back(""); expected.push_back("b,c");
 174   StringRef("a,,b,c").split(parts, ",", 2, true);
 175   EXPECT_TRUE(parts == expected);
 176
 177   expected.clear(); parts.clear();
 178   expected.push_back("a"); expected.push_back("b,c");
 179   StringRef("a,,b,c").split(parts, ",", 2, false);
 180   EXPECT_TRUE(parts == expected);
 181
 182   expected.clear(); parts.clear();
 183   expected.push_back("a"); expected.push_back(""); expected.push_back("b");
 184   expected.push_back("c");
 185   StringRef("a,,b,c").split(parts, ",", 3, true);
 186   EXPECT_TRUE(parts == expected);
 187
 188   expected.clear(); parts.clear();
 189   expected.push_back("a"); expected.push_back("b"); expected.push_back("c");
 190   StringRef("a,,b,c").split(parts, ",", 3, false);
 191   EXPECT_TRUE(parts == expected);
 192 }
 193
 194 TEST(StringRefTest, StartsWith) {
 195   StringRef Str("hello");
 196   EXPECT_TRUE(Str.startswith("he"));
 197   EXPECT_FALSE(Str.startswith("helloworld"));
 198   EXPECT_FALSE(Str.startswith("hi"));
 199 }
 200
 201 TEST(StringRefTest, Find) {
 202   StringRef Str("hello");
 203   EXPECT_EQ(2U, Str.find('l'));
 204   EXPECT_EQ(StringRef::npos, Str.find('z'));
 205   EXPECT_EQ(StringRef::npos, Str.find("helloworld"));
 206   EXPECT_EQ(0U, Str.find("hello"));
 207   EXPECT_EQ(1U, Str.find("ello"));
 208   EXPECT_EQ(StringRef::npos, Str.find("zz"));
 209   EXPECT_EQ(2U, Str.find("ll", 2));
 210   EXPECT_EQ(StringRef::npos, Str.find("ll", 3));
 211
 212   EXPECT_EQ(3U, Str.rfind('l'));
 213   EXPECT_EQ(StringRef::npos, Str.rfind('z'));
 214   EXPECT_EQ(StringRef::npos, Str.rfind("helloworld"));
 215   EXPECT_EQ(0U, Str.rfind("hello"));
 216   EXPECT_EQ(1U, Str.rfind("ello"));
 217   EXPECT_EQ(StringRef::npos, Str.rfind("zz"));
 218
 219   EXPECT_EQ(2U, Str.find_first_of('l'));
 220   EXPECT_EQ(1U, Str.find_first_of("el"));
 221   EXPECT_EQ(StringRef::npos, Str.find_first_of("xyz"));
 222
 223   EXPECT_EQ(1U, Str.find_first_not_of('h'));
 224   EXPECT_EQ(4U, Str.find_first_not_of("hel"));
 225   EXPECT_EQ(StringRef::npos, Str.find_first_not_of("hello"));
 226 }
 227
 228 TEST(StringRefTest, Count) {
 229   StringRef Str("hello");
 230   EXPECT_EQ(2U, Str.count('l'));
 231   EXPECT_EQ(1U, Str.count('o'));
 232   EXPECT_EQ(0U, Str.count('z'));
 233   EXPECT_EQ(0U, Str.count("helloworld"));
 234   EXPECT_EQ(1U, Str.count("hello"));
 235   EXPECT_EQ(1U, Str.count("ello"));
 236   EXPECT_EQ(0U, Str.count("zz"));
 237 }
 238
 239 TEST(StringRefTest, Misc) {
 240   std::string Storage;
 241   raw_string_ostream OS(Storage);
 242   OS << StringRef("hello");
 243   EXPECT_EQ("hello", OS.str());
 244 }
 245
 246 } // end anonymous namespace