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 TEST(StringRefTest, Construction) {
  18   EXPECT_TRUE(StringRef() == "");
  19   EXPECT_TRUE(StringRef("hello") == "hello");
  20   EXPECT_TRUE(StringRef("hello world", 5) == "hello");
  21   EXPECT_TRUE(StringRef(std::string("hello")) == "hello");
  22 }
  23
  24 TEST(StringRefTest, Iteration) {
  25   StringRef S("hello");
  26   const char *p = "hello";
  27   for (const char *it = S.begin(), *ie = S.end(); it != ie; ++it, ++p)
  28     EXPECT_TRUE(*p == *it);
  29 }
  30
  31 TEST(StringRefTest, StringOps) {
  32   const char *p = "hello";
  33   EXPECT_EQ(p, StringRef(p, 0).data());
  34   EXPECT_TRUE(StringRef().empty());
  35   EXPECT_EQ((size_t) 5, StringRef("hello").size());
  36   EXPECT_EQ(-1, StringRef("aab").compare("aad"));
  37   EXPECT_EQ( 0, StringRef("aab").compare("aab"));
  38   EXPECT_EQ( 1, StringRef("aab").compare("aaa"));
  39   EXPECT_EQ(-1, StringRef("aab").compare("aabb"));
  40   EXPECT_EQ( 1, StringRef("aab").compare("aa"));
  41 }
  42
  43 TEST(StringRefTest, Operators) {
  44   EXPECT_TRUE(StringRef() == "");
  45   EXPECT_TRUE(StringRef("aab") < StringRef("aad"));
  46   EXPECT_FALSE(StringRef("aab") < StringRef("aab"));
  47   EXPECT_TRUE(StringRef("aab") <= StringRef("aab"));
  48   EXPECT_FALSE(StringRef("aab") <= StringRef("aaa"));
  49   EXPECT_TRUE(StringRef("aad") > StringRef("aab"));
  50   EXPECT_FALSE(StringRef("aab") > StringRef("aab"));
  51   EXPECT_TRUE(StringRef("aab") >= StringRef("aab"));
  52   EXPECT_FALSE(StringRef("aaa") >= StringRef("aab"));
  53   EXPECT_TRUE(StringRef("aab") == StringRef("aab"));
  54   EXPECT_FALSE(StringRef("aab") == StringRef("aac"));
  55   EXPECT_FALSE(StringRef("aab") != StringRef("aab"));
  56   EXPECT_TRUE(StringRef("aab") != StringRef("aac"));
  57   EXPECT_EQ('a', StringRef("aab")[1]);
  58 }
  59
  60 TEST(StringRefTest, Utilities) {
  61   StringRef Str("hello");
  62   EXPECT_TRUE(Str.substr(3) == "lo");
  63   EXPECT_TRUE(Str.substr(100) == "");
  64   EXPECT_TRUE(Str.substr(0, 100) == "hello");
  65   EXPECT_TRUE(Str.substr(4, 10) == "o");
  66
  67   EXPECT_TRUE(Str.slice(2, 3) == "l");
  68   EXPECT_TRUE(Str.slice(1, 4) == "ell");
  69   EXPECT_TRUE(Str.slice(2, 100) == "llo");
  70   EXPECT_TRUE(Str.slice(2, 1) == "");
  71   EXPECT_TRUE(Str.slice(10, 20) == "");
  72
  73   EXPECT_TRUE(Str.split('X') == std::make_pair(StringRef("hello"),
  74                                                StringRef("")));
  75   EXPECT_TRUE(Str.split('e') == std::make_pair(StringRef("h"),
  76                                                StringRef("llo")));
  77   EXPECT_TRUE(Str.split('h') == std::make_pair(StringRef(""),
  78                                                StringRef("ello")));
  79   EXPECT_TRUE(Str.split('o') == std::make_pair(StringRef("hell"),
  80                                                StringRef("")));
  81
  82   EXPECT_TRUE(Str.startswith("he"));
  83   EXPECT_FALSE(Str.startswith("helloworld"));
  84   EXPECT_FALSE(Str.startswith("hi"));
  85
  86   std::string Storage;
  87   raw_string_ostream OS(Storage);
  88   OS << StringRef("hello");
  89   EXPECT_EQ("hello", OS.str());
  90
  91   EXPECT_TRUE(Str.find('l') == 2);
  92   EXPECT_TRUE(Str.find('z') == StringRef::npos);
  93   EXPECT_TRUE(Str.find("helloworld") == StringRef::npos);
  94   EXPECT_TRUE(Str.find("hello") == 0);
  95   EXPECT_TRUE(Str.find("ello") == 1);
  96   EXPECT_TRUE(Str.find("zz") == StringRef::npos);
  97
  98   EXPECT_TRUE(Str.count('l') == 2);
  99   EXPECT_TRUE(Str.count('o') == 1);
 100   EXPECT_TRUE(Str.count('z') == 0);
 101   EXPECT_TRUE(Str.count("helloworld") == 0);
 102   EXPECT_TRUE(Str.count("hello") == 1);
 103   EXPECT_TRUE(Str.count("ello") == 1);
 104   EXPECT_TRUE(Str.count("zz") == 0);
 105 }
 106
 107 } // end anonymous namespace