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.str();
  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   EXPECT_EQ( 1, StringRef("\xFF").compare_numeric("\1"));
  76   EXPECT_EQ( 1, StringRef("V16").compare_numeric("V1_q0"));
  77   EXPECT_EQ(-1, StringRef("V1_q0").compare_numeric("V16"));
  78   EXPECT_EQ(-1, StringRef("V8_q0").compare_numeric("V16"));
  79   EXPECT_EQ( 1, StringRef("V16").compare_numeric("V8_q0"));
  80   EXPECT_EQ(-1, StringRef("V1_q0").compare_numeric("V8_q0"));
  81   EXPECT_EQ( 1, StringRef("V8_q0").compare_numeric("V1_q0"));
  82 }
  83
  84 TEST(StringRefTest, Operators) {
  85   EXPECT_EQ("", StringRef());
  86   EXPECT_TRUE(StringRef("aab") < StringRef("aad"));
  87   EXPECT_FALSE(StringRef("aab") < StringRef("aab"));
  88   EXPECT_TRUE(StringRef("aab") <= StringRef("aab"));
  89   EXPECT_FALSE(StringRef("aab") <= StringRef("aaa"));
  90   EXPECT_TRUE(StringRef("aad") > StringRef("aab"));
  91   EXPECT_FALSE(StringRef("aab") > StringRef("aab"));
  92   EXPECT_TRUE(StringRef("aab") >= StringRef("aab"));
  93   EXPECT_FALSE(StringRef("aaa") >= StringRef("aab"));
  94   EXPECT_EQ(StringRef("aab"), StringRef("aab"));
  95   EXPECT_FALSE(StringRef("aab") == StringRef("aac"));
  96   EXPECT_FALSE(StringRef("aab") != StringRef("aab"));
  97   EXPECT_TRUE(StringRef("aab") != StringRef("aac"));
  98   EXPECT_EQ('a', StringRef("aab")[1]);
  99 }
 100
 101 TEST(StringRefTest, Substr) {
 102   StringRef Str("hello");
 103   EXPECT_EQ("lo", Str.substr(3));
 104   EXPECT_EQ("", Str.substr(100));
 105   EXPECT_EQ("hello", Str.substr(0, 100));
 106   EXPECT_EQ("o", Str.substr(4, 10));
 107 }
 108
 109 TEST(StringRefTest, Slice) {
 110   StringRef Str("hello");
 111   EXPECT_EQ("l", Str.slice(2, 3));
 112   EXPECT_EQ("ell", Str.slice(1, 4));
 113   EXPECT_EQ("llo", Str.slice(2, 100));
 114   EXPECT_EQ("", Str.slice(2, 1));
 115   EXPECT_EQ("", Str.slice(10, 20));
 116 }
 117
 118 TEST(StringRefTest, Split) {
 119   StringRef Str("hello");
 120   EXPECT_EQ(std::make_pair(StringRef("hello"), StringRef("")),
 121             Str.split('X'));
 122   EXPECT_EQ(std::make_pair(StringRef("h"), StringRef("llo")),
 123             Str.split('e'));
 124   EXPECT_EQ(std::make_pair(StringRef(""), StringRef("ello")),
 125             Str.split('h'));
 126   EXPECT_EQ(std::make_pair(StringRef("he"), StringRef("lo")),
 127             Str.split('l'));
 128   EXPECT_EQ(std::make_pair(StringRef("hell"), StringRef("")),
 129             Str.split('o'));
 130
 131   EXPECT_EQ(std::make_pair(StringRef("hello"), StringRef("")),
 132             Str.rsplit('X'));
 133   EXPECT_EQ(std::make_pair(StringRef("h"), StringRef("llo")),
 134             Str.rsplit('e'));
 135   EXPECT_EQ(std::make_pair(StringRef(""), StringRef("ello")),
 136             Str.rsplit('h'));
 137   EXPECT_EQ(std::make_pair(StringRef("hel"), StringRef("o")),
 138             Str.rsplit('l'));
 139   EXPECT_EQ(std::make_pair(StringRef("hell"), StringRef("")),
 140             Str.rsplit('o'));
 141 }
 142
 143 TEST(StringRefTest, Split2) {
 144   SmallVector<StringRef, 5> parts;
 145   SmallVector<StringRef, 5> expected;
 146
 147   expected.push_back("ab"); expected.push_back("c");
 148   StringRef(",ab,,c,").split(parts, ",", -1, false);
 149   EXPECT_TRUE(parts == expected);
 150
 151   expected.clear(); parts.clear();
 152   expected.push_back(""); expected.push_back("ab"); expected.push_back("");
 153   expected.push_back("c"); expected.push_back("");
 154   StringRef(",ab,,c,").split(parts, ",", -1, true);
 155   EXPECT_TRUE(parts == expected);
 156
 157   expected.clear(); parts.clear();
 158   expected.push_back("");
 159   StringRef("").split(parts, ",", -1, true);
 160   EXPECT_TRUE(parts == expected);
 161
 162   expected.clear(); parts.clear();
 163   StringRef("").split(parts, ",", -1, false);
 164   EXPECT_TRUE(parts == expected);
 165
 166   expected.clear(); parts.clear();
 167   StringRef(",").split(parts, ",", -1, false);
 168   EXPECT_TRUE(parts == expected);
 169
 170   expected.clear(); parts.clear();
 171   expected.push_back(""); expected.push_back("");
 172   StringRef(",").split(parts, ",", -1, true);
 173   EXPECT_TRUE(parts == expected);
 174
 175   expected.clear(); parts.clear();
 176   expected.push_back("a"); expected.push_back("b");
 177   StringRef("a,b").split(parts, ",", -1, true);
 178   EXPECT_TRUE(parts == expected);
 179
 180   // Test MaxSplit
 181   expected.clear(); parts.clear();
 182   expected.push_back("a,,b,c");
 183   StringRef("a,,b,c").split(parts, ",", 0, true);
 184   EXPECT_TRUE(parts == expected);
 185
 186   expected.clear(); parts.clear();
 187   expected.push_back("a,,b,c");
 188   StringRef("a,,b,c").split(parts, ",", 0, false);
 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, ",", 1, true);
 194   EXPECT_TRUE(parts == expected);
 195
 196   expected.clear(); parts.clear();
 197   expected.push_back("a"); expected.push_back(",b,c");
 198   StringRef("a,,b,c").split(parts, ",", 1, false);
 199   EXPECT_TRUE(parts == expected);
 200
 201   expected.clear(); parts.clear();
 202   expected.push_back("a"); expected.push_back(""); expected.push_back("b,c");
 203   StringRef("a,,b,c").split(parts, ",", 2, true);
 204   EXPECT_TRUE(parts == expected);
 205
 206   expected.clear(); parts.clear();
 207   expected.push_back("a"); expected.push_back("b,c");
 208   StringRef("a,,b,c").split(parts, ",", 2, false);
 209   EXPECT_TRUE(parts == expected);
 210
 211   expected.clear(); parts.clear();
 212   expected.push_back("a"); expected.push_back(""); expected.push_back("b");
 213   expected.push_back("c");
 214   StringRef("a,,b,c").split(parts, ",", 3, true);
 215   EXPECT_TRUE(parts == expected);
 216
 217   expected.clear(); parts.clear();
 218   expected.push_back("a"); expected.push_back("b"); expected.push_back("c");
 219   StringRef("a,,b,c").split(parts, ",", 3, false);
 220   EXPECT_TRUE(parts == expected);
 221 }
 222
 223 TEST(StringRefTest, StartsWith) {
 224   StringRef Str("hello");
 225   EXPECT_TRUE(Str.startswith("he"));
 226   EXPECT_FALSE(Str.startswith("helloworld"));
 227   EXPECT_FALSE(Str.startswith("hi"));
 228 }
 229
 230 TEST(StringRefTest, EndsWith) {
 231   StringRef Str("hello");
 232   EXPECT_TRUE(Str.endswith("lo"));
 233   EXPECT_FALSE(Str.endswith("helloworld"));
 234   EXPECT_FALSE(Str.endswith("worldhello"));
 235   EXPECT_FALSE(Str.endswith("so"));
 236 }
 237
 238 TEST(StringRefTest, Find) {
 239   StringRef Str("hello");
 240   EXPECT_EQ(2U, Str.find('l'));
 241   EXPECT_EQ(StringRef::npos, Str.find('z'));
 242   EXPECT_EQ(StringRef::npos, Str.find("helloworld"));
 243   EXPECT_EQ(0U, Str.find("hello"));
 244   EXPECT_EQ(1U, Str.find("ello"));
 245   EXPECT_EQ(StringRef::npos, Str.find("zz"));
 246   EXPECT_EQ(2U, Str.find("ll", 2));
 247   EXPECT_EQ(StringRef::npos, Str.find("ll", 3));
 248   EXPECT_EQ(0U, Str.find(""));
 249   StringRef LongStr("hellx xello hell ello world foo bar hello");
 250   EXPECT_EQ(36U, LongStr.find("hello"));
 251   EXPECT_EQ(28U, LongStr.find("foo"));
 252   EXPECT_EQ(12U, LongStr.find("hell", 2));
 253   EXPECT_EQ(0U, LongStr.find(""));
 254
 255   EXPECT_EQ(3U, Str.rfind('l'));
 256   EXPECT_EQ(StringRef::npos, Str.rfind('z'));
 257   EXPECT_EQ(StringRef::npos, Str.rfind("helloworld"));
 258   EXPECT_EQ(0U, Str.rfind("hello"));
 259   EXPECT_EQ(1U, Str.rfind("ello"));
 260   EXPECT_EQ(StringRef::npos, Str.rfind("zz"));
 261
 262   EXPECT_EQ(2U, Str.find_first_of('l'));
 263   EXPECT_EQ(1U, Str.find_first_of("el"));
 264   EXPECT_EQ(StringRef::npos, Str.find_first_of("xyz"));
 265
 266   EXPECT_EQ(1U, Str.find_first_not_of('h'));
 267   EXPECT_EQ(4U, Str.find_first_not_of("hel"));
 268   EXPECT_EQ(StringRef::npos, Str.find_first_not_of("hello"));
 269 }
 270
 271 TEST(StringRefTest, Count) {
 272   StringRef Str("hello");
 273   EXPECT_EQ(2U, Str.count('l'));
 274   EXPECT_EQ(1U, Str.count('o'));
 275   EXPECT_EQ(0U, Str.count('z'));
 276   EXPECT_EQ(0U, Str.count("helloworld"));
 277   EXPECT_EQ(1U, Str.count("hello"));
 278   EXPECT_EQ(1U, Str.count("ello"));
 279   EXPECT_EQ(0U, Str.count("zz"));
 280 }
 281
 282 TEST(StringRefTest, EditDistance) {
 283   StringRef Str("hello");
 284   EXPECT_EQ(2U, Str.edit_distance("hill"));
 285 }
 286
 287 TEST(StringRefTest, Misc) {
 288   std::string Storage;
 289   raw_string_ostream OS(Storage);
 290   OS << StringRef("hello");
 291   EXPECT_EQ("hello", OS.str());
 292 }
 293
 294 } // end anonymous namespace