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, StartsWith) {
 114   StringRef Str("hello");
 115   EXPECT_TRUE(Str.startswith("he"));
 116   EXPECT_FALSE(Str.startswith("helloworld"));
 117   EXPECT_FALSE(Str.startswith("hi"));
 118 }
 119
 120 TEST(StringRefTest, Find) {
 121   StringRef Str("hello");
 122   EXPECT_EQ(2U, Str.find('l'));
 123   EXPECT_EQ(StringRef::npos, Str.find('z'));
 124   EXPECT_EQ(StringRef::npos, Str.find("helloworld"));
 125   EXPECT_EQ(0U, Str.find("hello"));
 126   EXPECT_EQ(1U, Str.find("ello"));
 127   EXPECT_EQ(StringRef::npos, Str.find("zz"));
 128
 129   EXPECT_EQ(3U, Str.rfind('l'));
 130   EXPECT_EQ(StringRef::npos, Str.rfind('z'));
 131   EXPECT_EQ(StringRef::npos, Str.rfind("helloworld"));
 132   EXPECT_EQ(0U, Str.rfind("hello"));
 133   EXPECT_EQ(1U, Str.rfind("ello"));
 134   EXPECT_EQ(StringRef::npos, Str.rfind("zz"));
 135 }
 136
 137 TEST(StringRefTest, Count) {
 138   StringRef Str("hello");
 139   EXPECT_EQ(2U, Str.count('l'));
 140   EXPECT_EQ(1U, Str.count('o'));
 141   EXPECT_EQ(0U, Str.count('z'));
 142   EXPECT_EQ(0U, Str.count("helloworld"));
 143   EXPECT_EQ(1U, Str.count("hello"));
 144   EXPECT_EQ(1U, Str.count("ello"));
 145   EXPECT_EQ(0U, Str.count("zz"));
 146 }
 147
 148 TEST(StringRefTest, Misc) {
 149   std::string Storage;
 150   raw_string_ostream OS(Storage);
 151   OS << StringRef("hello");
 152   EXPECT_EQ("hello", OS.str());
 153 }
 154
 155 } // end anonymous namespace