unittests/ADT/StringRefTest.cpp - llvm - Git at Google

 //===- llvm/unittest/ADT/StringRefTest.cpp - StringRef unit tests ---------===//
 //
 //                     The LLVM Compiler Infrastructure
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//

 #include "gtest/gtest.h"
 #include "llvm/ADT/StringRef.h"
 #include "llvm/ADT/Hashing.h"
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/Support/raw_ostream.h"
 using namespace llvm;

 namespace llvm {

 std::ostream &operator<<(std::ostream &OS, const StringRef &S) {
   OS << S.str();
   return OS;
 }

 std::ostream &operator<<(std::ostream &OS,
                          const std::pair<StringRef, StringRef> &P) {
   OS << "(" << P.first << ", " << P.second << ")";
   return OS;
 }

 }

 namespace {
 TEST(StringRefTest, Construction) {
   EXPECT_EQ("", StringRef());
   EXPECT_EQ("hello", StringRef("hello"));
   EXPECT_EQ("hello", StringRef("hello world", 5));
   EXPECT_EQ("hello", StringRef(std::string("hello")));
 }

 TEST(StringRefTest, Iteration) {
   StringRef S("hello");
   const char *p = "hello";
   for (const char *it = S.begin(), *ie = S.end(); it != ie; ++it, ++p)
     EXPECT_EQ(*it, *p);
 }

 TEST(StringRefTest, StringOps) {
   const char *p = "hello";
   EXPECT_EQ(p, StringRef(p, 0).data());
   EXPECT_TRUE(StringRef().empty());
   EXPECT_EQ((size_t) 5, StringRef("hello").size());
   EXPECT_EQ(-1, StringRef("aab").compare("aad"));
   EXPECT_EQ( 0, StringRef("aab").compare("aab"));
   EXPECT_EQ( 1, StringRef("aab").compare("aaa"));
   EXPECT_EQ(-1, StringRef("aab").compare("aabb"));
   EXPECT_EQ( 1, StringRef("aab").compare("aa"));
   EXPECT_EQ( 1, StringRef("\xFF").compare("\1"));

   EXPECT_EQ(-1, StringRef("AaB").compare_lower("aAd"));
   EXPECT_EQ( 0, StringRef("AaB").compare_lower("aab"));
   EXPECT_EQ( 1, StringRef("AaB").compare_lower("AAA"));
   EXPECT_EQ(-1, StringRef("AaB").compare_lower("aaBb"));
   EXPECT_EQ( 1, StringRef("AaB").compare_lower("aA"));
   EXPECT_EQ( 1, StringRef("\xFF").compare_lower("\1"));

   EXPECT_EQ(-1, StringRef("aab").compare_numeric("aad"));
   EXPECT_EQ( 0, StringRef("aab").compare_numeric("aab"));
   EXPECT_EQ( 1, StringRef("aab").compare_numeric("aaa"));
   EXPECT_EQ(-1, StringRef("aab").compare_numeric("aabb"));
   EXPECT_EQ( 1, StringRef("aab").compare_numeric("aa"));
   EXPECT_EQ(-1, StringRef("1").compare_numeric("10"));
   EXPECT_EQ( 0, StringRef("10").compare_numeric("10"));
   EXPECT_EQ( 0, StringRef("10a").compare_numeric("10a"));
   EXPECT_EQ( 1, StringRef("2").compare_numeric("1"));
   EXPECT_EQ( 0, StringRef("llvm_v1i64_ty").compare_numeric("llvm_v1i64_ty"));
   EXPECT_EQ( 1, StringRef("\xFF").compare_numeric("\1"));
   EXPECT_EQ( 1, StringRef("V16").compare_numeric("V1_q0"));
   EXPECT_EQ(-1, StringRef("V1_q0").compare_numeric("V16"));
   EXPECT_EQ(-1, StringRef("V8_q0").compare_numeric("V16"));
   EXPECT_EQ( 1, StringRef("V16").compare_numeric("V8_q0"));
   EXPECT_EQ(-1, StringRef("V1_q0").compare_numeric("V8_q0"));
   EXPECT_EQ( 1, StringRef("V8_q0").compare_numeric("V1_q0"));
 }

 TEST(StringRefTest, Operators) {
   EXPECT_EQ("", StringRef());
   EXPECT_TRUE(StringRef("aab") < StringRef("aad"));
   EXPECT_FALSE(StringRef("aab") < StringRef("aab"));
   EXPECT_TRUE(StringRef("aab") <= StringRef("aab"));
   EXPECT_FALSE(StringRef("aab") <= StringRef("aaa"));
   EXPECT_TRUE(StringRef("aad") > StringRef("aab"));
   EXPECT_FALSE(StringRef("aab") > StringRef("aab"));
   EXPECT_TRUE(StringRef("aab") >= StringRef("aab"));
   EXPECT_FALSE(StringRef("aaa") >= StringRef("aab"));
   EXPECT_EQ(StringRef("aab"), StringRef("aab"));
   EXPECT_FALSE(StringRef("aab") == StringRef("aac"));
   EXPECT_FALSE(StringRef("aab") != StringRef("aab"));
   EXPECT_TRUE(StringRef("aab") != StringRef("aac"));
   EXPECT_EQ('a', StringRef("aab")[1]);
 }

 TEST(StringRefTest, Substr) {
   StringRef Str("hello");
   EXPECT_EQ("lo", Str.substr(3));
   EXPECT_EQ("", Str.substr(100));
   EXPECT_EQ("hello", Str.substr(0, 100));
   EXPECT_EQ("o", Str.substr(4, 10));
 }

 TEST(StringRefTest, Slice) {
   StringRef Str("hello");
   EXPECT_EQ("l", Str.slice(2, 3));
   EXPECT_EQ("ell", Str.slice(1, 4));
   EXPECT_EQ("llo", Str.slice(2, 100));
   EXPECT_EQ("", Str.slice(2, 1));
   EXPECT_EQ("", Str.slice(10, 20));
 }

 TEST(StringRefTest, Split) {
   StringRef Str("hello");
   EXPECT_EQ(std::make_pair(StringRef("hello"), StringRef("")),
             Str.split('X'));
   EXPECT_EQ(std::make_pair(StringRef("h"), StringRef("llo")),
             Str.split('e'));
   EXPECT_EQ(std::make_pair(StringRef(""), StringRef("ello")),
             Str.split('h'));
   EXPECT_EQ(std::make_pair(StringRef("he"), StringRef("lo")),
             Str.split('l'));
   EXPECT_EQ(std::make_pair(StringRef("hell"), StringRef("")),
             Str.split('o'));

   EXPECT_EQ(std::make_pair(StringRef("hello"), StringRef("")),
             Str.rsplit('X'));
   EXPECT_EQ(std::make_pair(StringRef("h"), StringRef("llo")),
             Str.rsplit('e'));
   EXPECT_EQ(std::make_pair(StringRef(""), StringRef("ello")),
             Str.rsplit('h'));
   EXPECT_EQ(std::make_pair(StringRef("hel"), StringRef("o")),
             Str.rsplit('l'));
   EXPECT_EQ(std::make_pair(StringRef("hell"), StringRef("")),
             Str.rsplit('o'));
 }

 TEST(StringRefTest, Split2) {
   SmallVector<StringRef, 5> parts;
   SmallVector<StringRef, 5> expected;

   expected.push_back("ab"); expected.push_back("c");
   StringRef(",ab,,c,").split(parts, ",", -1, false);
   EXPECT_TRUE(parts == expected);

   expected.clear(); parts.clear();
   expected.push_back(""); expected.push_back("ab"); expected.push_back("");
   expected.push_back("c"); expected.push_back("");
   StringRef(",ab,,c,").split(parts, ",", -1, true);
   EXPECT_TRUE(parts == expected);

   expected.clear(); parts.clear();
   expected.push_back("");
   StringRef("").split(parts, ",", -1, true);
   EXPECT_TRUE(parts == expected);

   expected.clear(); parts.clear();
   StringRef("").split(parts, ",", -1, false);
   EXPECT_TRUE(parts == expected);

   expected.clear(); parts.clear();
   StringRef(",").split(parts, ",", -1, false);
   EXPECT_TRUE(parts == expected);

   expected.clear(); parts.clear();
   expected.push_back(""); expected.push_back("");
   StringRef(",").split(parts, ",", -1, true);
   EXPECT_TRUE(parts == expected);

   expected.clear(); parts.clear();
   expected.push_back("a"); expected.push_back("b");
   StringRef("a,b").split(parts, ",", -1, true);
   EXPECT_TRUE(parts == expected);

   // Test MaxSplit
   expected.clear(); parts.clear();
   expected.push_back("a,,b,c");
   StringRef("a,,b,c").split(parts, ",", 0, true);
   EXPECT_TRUE(parts == expected);

   expected.clear(); parts.clear();
   expected.push_back("a,,b,c");
   StringRef("a,,b,c").split(parts, ",", 0, false);
   EXPECT_TRUE(parts == expected);

   expected.clear(); parts.clear();
   expected.push_back("a"); expected.push_back(",b,c");
   StringRef("a,,b,c").split(parts, ",", 1, true);
   EXPECT_TRUE(parts == expected);

   expected.clear(); parts.clear();
   expected.push_back("a"); expected.push_back(",b,c");
   StringRef("a,,b,c").split(parts, ",", 1, false);
   EXPECT_TRUE(parts == expected);

   expected.clear(); parts.clear();
   expected.push_back("a"); expected.push_back(""); expected.push_back("b,c");
   StringRef("a,,b,c").split(parts, ",", 2, true);
   EXPECT_TRUE(parts == expected);

   expected.clear(); parts.clear();
   expected.push_back("a"); expected.push_back("b,c");
   StringRef("a,,b,c").split(parts, ",", 2, false);
   EXPECT_TRUE(parts == expected);

   expected.clear(); parts.clear();
   expected.push_back("a"); expected.push_back(""); expected.push_back("b");
   expected.push_back("c");
   StringRef("a,,b,c").split(parts, ",", 3, true);
   EXPECT_TRUE(parts == expected);

   expected.clear(); parts.clear();
   expected.push_back("a"); expected.push_back("b"); expected.push_back("c");
   StringRef("a,,b,c").split(parts, ",", 3, false);
   EXPECT_TRUE(parts == expected);
 }

 TEST(StringRefTest, StartsWith) {
   StringRef Str("hello");
   EXPECT_TRUE(Str.startswith("he"));
   EXPECT_FALSE(Str.startswith("helloworld"));
   EXPECT_FALSE(Str.startswith("hi"));
 }

 TEST(StringRefTest, EndsWith) {
   StringRef Str("hello");
   EXPECT_TRUE(Str.endswith("lo"));
   EXPECT_FALSE(Str.endswith("helloworld"));
   EXPECT_FALSE(Str.endswith("worldhello"));
   EXPECT_FALSE(Str.endswith("so"));
 }

 TEST(StringRefTest, Find) {
   StringRef Str("hello");
   EXPECT_EQ(2U, Str.find('l'));
   EXPECT_EQ(StringRef::npos, Str.find('z'));
   EXPECT_EQ(StringRef::npos, Str.find("helloworld"));
   EXPECT_EQ(0U, Str.find("hello"));
   EXPECT_EQ(1U, Str.find("ello"));
   EXPECT_EQ(StringRef::npos, Str.find("zz"));
   EXPECT_EQ(2U, Str.find("ll", 2));
   EXPECT_EQ(StringRef::npos, Str.find("ll", 3));
   EXPECT_EQ(0U, Str.find(""));
   StringRef LongStr("hellx xello hell ello world foo bar hello");
   EXPECT_EQ(36U, LongStr.find("hello"));
   EXPECT_EQ(28U, LongStr.find("foo"));
   EXPECT_EQ(12U, LongStr.find("hell", 2));
   EXPECT_EQ(0U, LongStr.find(""));

   EXPECT_EQ(3U, Str.rfind('l'));
   EXPECT_EQ(StringRef::npos, Str.rfind('z'));
   EXPECT_EQ(StringRef::npos, Str.rfind("helloworld"));
   EXPECT_EQ(0U, Str.rfind("hello"));
   EXPECT_EQ(1U, Str.rfind("ello"));
   EXPECT_EQ(StringRef::npos, Str.rfind("zz"));

   EXPECT_EQ(2U, Str.find_first_of('l'));
   EXPECT_EQ(1U, Str.find_first_of("el"));
   EXPECT_EQ(StringRef::npos, Str.find_first_of("xyz"));

   EXPECT_EQ(1U, Str.find_first_not_of('h'));
   EXPECT_EQ(4U, Str.find_first_not_of("hel"));
   EXPECT_EQ(StringRef::npos, Str.find_first_not_of("hello"));
 }

 TEST(StringRefTest, Count) {
   StringRef Str("hello");
   EXPECT_EQ(2U, Str.count('l'));
   EXPECT_EQ(1U, Str.count('o'));
   EXPECT_EQ(0U, Str.count('z'));
   EXPECT_EQ(0U, Str.count("helloworld"));
   EXPECT_EQ(1U, Str.count("hello"));
   EXPECT_EQ(1U, Str.count("ello"));
   EXPECT_EQ(0U, Str.count("zz"));
 }

 TEST(StringRefTest, EditDistance) {
   StringRef Str("hello");
   EXPECT_EQ(2U, Str.edit_distance("hill"));
 }

 TEST(StringRefTest, Misc) {
   std::string Storage;
   raw_string_ostream OS(Storage);
   OS << StringRef("hello");
   EXPECT_EQ("hello", OS.str());
 }

 TEST(StringRefTest, Hashing) {
   EXPECT_EQ(hash_value(std::string()), hash_value(StringRef()));
   EXPECT_EQ(hash_value(std::string()), hash_value(StringRef("")));
   std::string S = "hello world";
   hash_code H = hash_value(S);
   EXPECT_EQ(H, hash_value(StringRef("hello world")));
   EXPECT_EQ(H, hash_value(StringRef(S)));
   EXPECT_NE(H, hash_value(StringRef("hello worl")));
   EXPECT_EQ(hash_value(std::string("hello worl")),
             hash_value(StringRef("hello worl")));
   EXPECT_NE(H, hash_value(StringRef("hello world ")));
   EXPECT_EQ(hash_value(std::string("hello world ")),
             hash_value(StringRef("hello world ")));
   EXPECT_EQ(H, hash_value(StringRef("hello world\0")));
   EXPECT_NE(hash_value(std::string("ello worl")),
             hash_value(StringRef("hello world").slice(1, -1)));
 }

 struct UnsignedPair {
   const char *Str;
   uint64_t Expected;
 } Unsigned[] =
   { {"0", 0}
   , {"255", 255}
   , {"256", 256}
   , {"65535", 65535}
   , {"65536", 65536}
   , {"4294967295", 4294967295ULL}
   , {"4294967296", 4294967296ULL}
   , {"18446744073709551615", 18446744073709551615ULL}
   , {"042", 34}
   , {"0x42", 66}
   , {"0b101010", 42}
   };

 struct SignedPair {
   const char *Str;
   int64_t Expected;
 } Signed[] =
   { {"0", 0}
   , {"-0", 0}
   , {"127", 127}
   , {"128", 128}
   , {"-128", -128}
   , {"-129", -129}
   , {"32767", 32767}
   , {"32768", 32768}
   , {"-32768", -32768}
   , {"-32769", -32769}
   , {"2147483647", 2147483647LL}
   , {"2147483648", 2147483648LL}
   , {"-2147483648", -2147483648LL}
   , {"-2147483649", -2147483649LL}
   , {"-9223372036854775808", -(9223372036854775807LL) - 1}
   , {"042", 34}
   , {"0x42", 66}
   , {"0b101010", 42}
   , {"-042", -34}
   , {"-0x42", -66}
   , {"-0b101010", -42}
   };

 TEST(StringRefTest, getAsInteger) {
   uint8_t U8;
   uint16_t U16;
   uint32_t U32;
   uint64_t U64;

   for (size_t i = 0; i < array_lengthof(Unsigned); ++i) {
     bool U8Success = StringRef(Unsigned[i].Str).getAsInteger(0, U8);
     if (static_cast<uint8_t>(Unsigned[i].Expected) == Unsigned[i].Expected) {
       ASSERT_FALSE(U8Success);
       EXPECT_EQ(U8, Unsigned[i].Expected);
     } else {
       ASSERT_TRUE(U8Success);
     }
     bool U16Success = StringRef(Unsigned[i].Str).getAsInteger(0, U16);
     if (static_cast<uint16_t>(Unsigned[i].Expected) == Unsigned[i].Expected) {
       ASSERT_FALSE(U16Success);
       EXPECT_EQ(U16, Unsigned[i].Expected);
     } else {
       ASSERT_TRUE(U16Success);
     }
     bool U32Success = StringRef(Unsigned[i].Str).getAsInteger(0, U32);
     if (static_cast<uint32_t>(Unsigned[i].Expected) == Unsigned[i].Expected) {
       ASSERT_FALSE(U32Success);
       EXPECT_EQ(U32, Unsigned[i].Expected);
     } else {
       ASSERT_TRUE(U32Success);
     }
     bool U64Success = StringRef(Unsigned[i].Str).getAsInteger(0, U64);
     if (static_cast<uint64_t>(Unsigned[i].Expected) == Unsigned[i].Expected) {
       ASSERT_FALSE(U64Success);
       EXPECT_EQ(U64, Unsigned[i].Expected);
     } else {
       ASSERT_TRUE(U64Success);
     }
   }

   int8_t S8;
   int16_t S16;
   int32_t S32;
   int64_t S64;

   for (size_t i = 0; i < array_lengthof(Signed); ++i) {
     bool S8Success = StringRef(Signed[i].Str).getAsInteger(0, S8);
     if (static_cast<int8_t>(Signed[i].Expected) == Signed[i].Expected) {
       ASSERT_FALSE(S8Success);
       EXPECT_EQ(S8, Signed[i].Expected);
     } else {
       ASSERT_TRUE(S8Success);
     }
     bool S16Success = StringRef(Signed[i].Str).getAsInteger(0, S16);
     if (static_cast<int16_t>(Signed[i].Expected) == Signed[i].Expected) {
       ASSERT_FALSE(S16Success);
       EXPECT_EQ(S16, Signed[i].Expected);
     } else {
       ASSERT_TRUE(S16Success);
     }
     bool S32Success = StringRef(Signed[i].Str).getAsInteger(0, S32);
     if (static_cast<int32_t>(Signed[i].Expected) == Signed[i].Expected) {
       ASSERT_FALSE(S32Success);
       EXPECT_EQ(S32, Signed[i].Expected);
     } else {
       ASSERT_TRUE(S32Success);
     }
     bool S64Success = StringRef(Signed[i].Str).getAsInteger(0, S64);
     if (static_cast<int64_t>(Signed[i].Expected) == Signed[i].Expected) {
       ASSERT_FALSE(S64Success);
       EXPECT_EQ(S64, Signed[i].Expected);
     } else {
       ASSERT_TRUE(S64Success);
     }
   }
 }

 } // end anonymous namespace
	//===- llvm/unittest/ADT/StringRefTest.cpp - StringRef unit tests ---------===//
	//
	// The LLVM Compiler Infrastructure
	//
	// This file is distributed under the University of Illinois Open Source
	// License. See LICENSE.TXT for details.
	//
	//===----------------------------------------------------------------------===//

	#include "gtest/gtest.h"
	#include "llvm/ADT/StringRef.h"
	#include "llvm/ADT/Hashing.h"
	#include "llvm/ADT/SmallVector.h"
	#include "llvm/Support/raw_ostream.h"
	using namespace llvm;

	namespace llvm {

	std::ostream &operator<<(std::ostream &OS, const StringRef &S) {
	OS << S.str();
	return OS;
	}

	std::ostream &operator<<(std::ostream &OS,
	const std::pair<StringRef, StringRef> &P) {
	OS << "(" << P.first << ", " << P.second << ")";
	return OS;
	}

	}

	namespace {
	TEST(StringRefTest, Construction) {
	EXPECT_EQ("", StringRef());
	EXPECT_EQ("hello", StringRef("hello"));
	EXPECT_EQ("hello", StringRef("hello world", 5));
	EXPECT_EQ("hello", StringRef(std::string("hello")));
	}

	TEST(StringRefTest, Iteration) {
	StringRef S("hello");
	const char *p = "hello";
	for (const char it = S.begin(), ie = S.end(); it != ie; ++it, ++p)
	EXPECT_EQ(it, p);
	}

	TEST(StringRefTest, StringOps) {
	const char *p = "hello";
	EXPECT_EQ(p, StringRef(p, 0).data());
	EXPECT_TRUE(StringRef().empty());
	EXPECT_EQ((size_t) 5, StringRef("hello").size());
	EXPECT_EQ(-1, StringRef("aab").compare("aad"));
	EXPECT_EQ( 0, StringRef("aab").compare("aab"));
	EXPECT_EQ( 1, StringRef("aab").compare("aaa"));
	EXPECT_EQ(-1, StringRef("aab").compare("aabb"));
	EXPECT_EQ( 1, StringRef("aab").compare("aa"));
	EXPECT_EQ( 1, StringRef("\xFF").compare("\1"));

	EXPECT_EQ(-1, StringRef("AaB").compare_lower("aAd"));
	EXPECT_EQ( 0, StringRef("AaB").compare_lower("aab"));
	EXPECT_EQ( 1, StringRef("AaB").compare_lower("AAA"));
	EXPECT_EQ(-1, StringRef("AaB").compare_lower("aaBb"));
	EXPECT_EQ( 1, StringRef("AaB").compare_lower("aA"));
	EXPECT_EQ( 1, StringRef("\xFF").compare_lower("\1"));

	EXPECT_EQ(-1, StringRef("aab").compare_numeric("aad"));
	EXPECT_EQ( 0, StringRef("aab").compare_numeric("aab"));
	EXPECT_EQ( 1, StringRef("aab").compare_numeric("aaa"));
	EXPECT_EQ(-1, StringRef("aab").compare_numeric("aabb"));
	EXPECT_EQ( 1, StringRef("aab").compare_numeric("aa"));
	EXPECT_EQ(-1, StringRef("1").compare_numeric("10"));
	EXPECT_EQ( 0, StringRef("10").compare_numeric("10"));
	EXPECT_EQ( 0, StringRef("10a").compare_numeric("10a"));
	EXPECT_EQ( 1, StringRef("2").compare_numeric("1"));
	EXPECT_EQ( 0, StringRef("llvm_v1i64_ty").compare_numeric("llvm_v1i64_ty"));
	EXPECT_EQ( 1, StringRef("\xFF").compare_numeric("\1"));
	EXPECT_EQ( 1, StringRef("V16").compare_numeric("V1_q0"));
	EXPECT_EQ(-1, StringRef("V1_q0").compare_numeric("V16"));
	EXPECT_EQ(-1, StringRef("V8_q0").compare_numeric("V16"));
	EXPECT_EQ( 1, StringRef("V16").compare_numeric("V8_q0"));
	EXPECT_EQ(-1, StringRef("V1_q0").compare_numeric("V8_q0"));
	EXPECT_EQ( 1, StringRef("V8_q0").compare_numeric("V1_q0"));
	}

	TEST(StringRefTest, Operators) {
	EXPECT_EQ("", StringRef());
	EXPECT_TRUE(StringRef("aab") < StringRef("aad"));
	EXPECT_FALSE(StringRef("aab") < StringRef("aab"));
	EXPECT_TRUE(StringRef("aab") <= StringRef("aab"));
	EXPECT_FALSE(StringRef("aab") <= StringRef("aaa"));
	EXPECT_TRUE(StringRef("aad") > StringRef("aab"));
	EXPECT_FALSE(StringRef("aab") > StringRef("aab"));
	EXPECT_TRUE(StringRef("aab") >= StringRef("aab"));
	EXPECT_FALSE(StringRef("aaa") >= StringRef("aab"));
	EXPECT_EQ(StringRef("aab"), StringRef("aab"));
	EXPECT_FALSE(StringRef("aab") == StringRef("aac"));
	EXPECT_FALSE(StringRef("aab") != StringRef("aab"));
	EXPECT_TRUE(StringRef("aab") != StringRef("aac"));
	EXPECT_EQ('a', StringRef("aab")[1]);
	}

	TEST(StringRefTest, Substr) {
	StringRef Str("hello");
	EXPECT_EQ("lo", Str.substr(3));
	EXPECT_EQ("", Str.substr(100));
	EXPECT_EQ("hello", Str.substr(0, 100));
	EXPECT_EQ("o", Str.substr(4, 10));
	}

	TEST(StringRefTest, Slice) {
	StringRef Str("hello");
	EXPECT_EQ("l", Str.slice(2, 3));
	EXPECT_EQ("ell", Str.slice(1, 4));
	EXPECT_EQ("llo", Str.slice(2, 100));
	EXPECT_EQ("", Str.slice(2, 1));
	EXPECT_EQ("", Str.slice(10, 20));
	}

	TEST(StringRefTest, Split) {
	StringRef Str("hello");
	EXPECT_EQ(std::make_pair(StringRef("hello"), StringRef("")),
	Str.split('X'));
	EXPECT_EQ(std::make_pair(StringRef("h"), StringRef("llo")),
	Str.split('e'));
	EXPECT_EQ(std::make_pair(StringRef(""), StringRef("ello")),
	Str.split('h'));
	EXPECT_EQ(std::make_pair(StringRef("he"), StringRef("lo")),
	Str.split('l'));
	EXPECT_EQ(std::make_pair(StringRef("hell"), StringRef("")),
	Str.split('o'));

	EXPECT_EQ(std::make_pair(StringRef("hello"), StringRef("")),
	Str.rsplit('X'));
	EXPECT_EQ(std::make_pair(StringRef("h"), StringRef("llo")),
	Str.rsplit('e'));
	EXPECT_EQ(std::make_pair(StringRef(""), StringRef("ello")),
	Str.rsplit('h'));
	EXPECT_EQ(std::make_pair(StringRef("hel"), StringRef("o")),
	Str.rsplit('l'));
	EXPECT_EQ(std::make_pair(StringRef("hell"), StringRef("")),
	Str.rsplit('o'));
	}

	TEST(StringRefTest, Split2) {
	SmallVector<StringRef, 5> parts;
	SmallVector<StringRef, 5> expected;

	expected.push_back("ab"); expected.push_back("c");
	StringRef(",ab,,c,").split(parts, ",", -1, false);
	EXPECT_TRUE(parts == expected);

	expected.clear(); parts.clear();
	expected.push_back(""); expected.push_back("ab"); expected.push_back("");
	expected.push_back("c"); expected.push_back("");
	StringRef(",ab,,c,").split(parts, ",", -1, true);
	EXPECT_TRUE(parts == expected);

	expected.clear(); parts.clear();
	expected.push_back("");
	StringRef("").split(parts, ",", -1, true);
	EXPECT_TRUE(parts == expected);

	expected.clear(); parts.clear();
	StringRef("").split(parts, ",", -1, false);
	EXPECT_TRUE(parts == expected);

	expected.clear(); parts.clear();
	StringRef(",").split(parts, ",", -1, false);
	EXPECT_TRUE(parts == expected);

	expected.clear(); parts.clear();
	expected.push_back(""); expected.push_back("");
	StringRef(",").split(parts, ",", -1, true);
	EXPECT_TRUE(parts == expected);

	expected.clear(); parts.clear();
	expected.push_back("a"); expected.push_back("b");
	StringRef("a,b").split(parts, ",", -1, true);
	EXPECT_TRUE(parts == expected);

	// Test MaxSplit
	expected.clear(); parts.clear();
	expected.push_back("a,,b,c");
	StringRef("a,,b,c").split(parts, ",", 0, true);
	EXPECT_TRUE(parts == expected);

	expected.clear(); parts.clear();
	expected.push_back("a,,b,c");
	StringRef("a,,b,c").split(parts, ",", 0, false);
	EXPECT_TRUE(parts == expected);

	expected.clear(); parts.clear();
	expected.push_back("a"); expected.push_back(",b,c");
	StringRef("a,,b,c").split(parts, ",", 1, true);
	EXPECT_TRUE(parts == expected);

	expected.clear(); parts.clear();
	expected.push_back("a"); expected.push_back(",b,c");
	StringRef("a,,b,c").split(parts, ",", 1, false);
	EXPECT_TRUE(parts == expected);

	expected.clear(); parts.clear();
	expected.push_back("a"); expected.push_back(""); expected.push_back("b,c");
	StringRef("a,,b,c").split(parts, ",", 2, true);
	EXPECT_TRUE(parts == expected);

	expected.clear(); parts.clear();
	expected.push_back("a"); expected.push_back("b,c");
	StringRef("a,,b,c").split(parts, ",", 2, false);
	EXPECT_TRUE(parts == expected);

	expected.clear(); parts.clear();
	expected.push_back("a"); expected.push_back(""); expected.push_back("b");
	expected.push_back("c");
	StringRef("a,,b,c").split(parts, ",", 3, true);
	EXPECT_TRUE(parts == expected);

	expected.clear(); parts.clear();
	expected.push_back("a"); expected.push_back("b"); expected.push_back("c");
	StringRef("a,,b,c").split(parts, ",", 3, false);
	EXPECT_TRUE(parts == expected);
	}

	TEST(StringRefTest, StartsWith) {
	StringRef Str("hello");
	EXPECT_TRUE(Str.startswith("he"));
	EXPECT_FALSE(Str.startswith("helloworld"));
	EXPECT_FALSE(Str.startswith("hi"));
	}

	TEST(StringRefTest, EndsWith) {
	StringRef Str("hello");
	EXPECT_TRUE(Str.endswith("lo"));
	EXPECT_FALSE(Str.endswith("helloworld"));
	EXPECT_FALSE(Str.endswith("worldhello"));
	EXPECT_FALSE(Str.endswith("so"));
	}

	TEST(StringRefTest, Find) {
	StringRef Str("hello");
	EXPECT_EQ(2U, Str.find('l'));
	EXPECT_EQ(StringRef::npos, Str.find('z'));
	EXPECT_EQ(StringRef::npos, Str.find("helloworld"));
	EXPECT_EQ(0U, Str.find("hello"));
	EXPECT_EQ(1U, Str.find("ello"));
	EXPECT_EQ(StringRef::npos, Str.find("zz"));
	EXPECT_EQ(2U, Str.find("ll", 2));
	EXPECT_EQ(StringRef::npos, Str.find("ll", 3));
	EXPECT_EQ(0U, Str.find(""));
	StringRef LongStr("hellx xello hell ello world foo bar hello");
	EXPECT_EQ(36U, LongStr.find("hello"));
	EXPECT_EQ(28U, LongStr.find("foo"));
	EXPECT_EQ(12U, LongStr.find("hell", 2));
	EXPECT_EQ(0U, LongStr.find(""));

	EXPECT_EQ(3U, Str.rfind('l'));
	EXPECT_EQ(StringRef::npos, Str.rfind('z'));
	EXPECT_EQ(StringRef::npos, Str.rfind("helloworld"));
	EXPECT_EQ(0U, Str.rfind("hello"));
	EXPECT_EQ(1U, Str.rfind("ello"));
	EXPECT_EQ(StringRef::npos, Str.rfind("zz"));

	EXPECT_EQ(2U, Str.find_first_of('l'));
	EXPECT_EQ(1U, Str.find_first_of("el"));
	EXPECT_EQ(StringRef::npos, Str.find_first_of("xyz"));

	EXPECT_EQ(1U, Str.find_first_not_of('h'));
	EXPECT_EQ(4U, Str.find_first_not_of("hel"));
	EXPECT_EQ(StringRef::npos, Str.find_first_not_of("hello"));
	}

	TEST(StringRefTest, Count) {
	StringRef Str("hello");
	EXPECT_EQ(2U, Str.count('l'));
	EXPECT_EQ(1U, Str.count('o'));
	EXPECT_EQ(0U, Str.count('z'));
	EXPECT_EQ(0U, Str.count("helloworld"));
	EXPECT_EQ(1U, Str.count("hello"));
	EXPECT_EQ(1U, Str.count("ello"));
	EXPECT_EQ(0U, Str.count("zz"));
	}

	TEST(StringRefTest, EditDistance) {
	StringRef Str("hello");
	EXPECT_EQ(2U, Str.edit_distance("hill"));
	}

	TEST(StringRefTest, Misc) {
	std::string Storage;
	raw_string_ostream OS(Storage);
	OS << StringRef("hello");
	EXPECT_EQ("hello", OS.str());
	}

	TEST(StringRefTest, Hashing) {
	EXPECT_EQ(hash_value(std::string()), hash_value(StringRef()));
	EXPECT_EQ(hash_value(std::string()), hash_value(StringRef("")));
	std::string S = "hello world";
	hash_code H = hash_value(S);
	EXPECT_EQ(H, hash_value(StringRef("hello world")));
	EXPECT_EQ(H, hash_value(StringRef(S)));
	EXPECT_NE(H, hash_value(StringRef("hello worl")));
	EXPECT_EQ(hash_value(std::string("hello worl")),
	hash_value(StringRef("hello worl")));
	EXPECT_NE(H, hash_value(StringRef("hello world ")));
	EXPECT_EQ(hash_value(std::string("hello world ")),
	hash_value(StringRef("hello world ")));
	EXPECT_EQ(H, hash_value(StringRef("hello world\0")));
	EXPECT_NE(hash_value(std::string("ello worl")),
	hash_value(StringRef("hello world").slice(1, -1)));
	}

	struct UnsignedPair {
	const char *Str;
	uint64_t Expected;
	} Unsigned[] =
	{ {"0", 0}
	, {"255", 255}
	, {"256", 256}
	, {"65535", 65535}
	, {"65536", 65536}
	, {"4294967295", 4294967295ULL}
	, {"4294967296", 4294967296ULL}
	, {"18446744073709551615", 18446744073709551615ULL}
	, {"042", 34}
	, {"0x42", 66}
	, {"0b101010", 42}
	};

	struct SignedPair {
	const char *Str;
	int64_t Expected;
	} Signed[] =
	{ {"0", 0}
	, {"-0", 0}
	, {"127", 127}
	, {"128", 128}
	, {"-128", -128}
	, {"-129", -129}
	, {"32767", 32767}
	, {"32768", 32768}
	, {"-32768", -32768}
	, {"-32769", -32769}
	, {"2147483647", 2147483647LL}
	, {"2147483648", 2147483648LL}
	, {"-2147483648", -2147483648LL}
	, {"-2147483649", -2147483649LL}
	, {"-9223372036854775808", -(9223372036854775807LL) - 1}
	, {"042", 34}
	, {"0x42", 66}
	, {"0b101010", 42}
	, {"-042", -34}
	, {"-0x42", -66}
	, {"-0b101010", -42}
	};

	TEST(StringRefTest, getAsInteger) {
	uint8_t U8;
	uint16_t U16;
	uint32_t U32;
	uint64_t U64;

	for (size_t i = 0; i < array_lengthof(Unsigned); ++i) {
	bool U8Success = StringRef(Unsigned[i].Str).getAsInteger(0, U8);
	if (static_cast<uint8_t>(Unsigned[i].Expected) == Unsigned[i].Expected) {
	ASSERT_FALSE(U8Success);
	EXPECT_EQ(U8, Unsigned[i].Expected);
	} else {
	ASSERT_TRUE(U8Success);
	}
	bool U16Success = StringRef(Unsigned[i].Str).getAsInteger(0, U16);
	if (static_cast<uint16_t>(Unsigned[i].Expected) == Unsigned[i].Expected) {
	ASSERT_FALSE(U16Success);
	EXPECT_EQ(U16, Unsigned[i].Expected);
	} else {
	ASSERT_TRUE(U16Success);
	}
	bool U32Success = StringRef(Unsigned[i].Str).getAsInteger(0, U32);
	if (static_cast<uint32_t>(Unsigned[i].Expected) == Unsigned[i].Expected) {
	ASSERT_FALSE(U32Success);
	EXPECT_EQ(U32, Unsigned[i].Expected);
	} else {
	ASSERT_TRUE(U32Success);
	}
	bool U64Success = StringRef(Unsigned[i].Str).getAsInteger(0, U64);
	if (static_cast<uint64_t>(Unsigned[i].Expected) == Unsigned[i].Expected) {
	ASSERT_FALSE(U64Success);
	EXPECT_EQ(U64, Unsigned[i].Expected);
	} else {
	ASSERT_TRUE(U64Success);
	}
	}

	int8_t S8;
	int16_t S16;
	int32_t S32;
	int64_t S64;

	for (size_t i = 0; i < array_lengthof(Signed); ++i) {
	bool S8Success = StringRef(Signed[i].Str).getAsInteger(0, S8);
	if (static_cast<int8_t>(Signed[i].Expected) == Signed[i].Expected) {
	ASSERT_FALSE(S8Success);
	EXPECT_EQ(S8, Signed[i].Expected);
	} else {
	ASSERT_TRUE(S8Success);
	}
	bool S16Success = StringRef(Signed[i].Str).getAsInteger(0, S16);
	if (static_cast<int16_t>(Signed[i].Expected) == Signed[i].Expected) {
	ASSERT_FALSE(S16Success);
	EXPECT_EQ(S16, Signed[i].Expected);
	} else {
	ASSERT_TRUE(S16Success);
	}
	bool S32Success = StringRef(Signed[i].Str).getAsInteger(0, S32);
	if (static_cast<int32_t>(Signed[i].Expected) == Signed[i].Expected) {
	ASSERT_FALSE(S32Success);
	EXPECT_EQ(S32, Signed[i].Expected);
	} else {
	ASSERT_TRUE(S32Success);
	}
	bool S64Success = StringRef(Signed[i].Str).getAsInteger(0, S64);
	if (static_cast<int64_t>(Signed[i].Expected) == Signed[i].Expected) {
	ASSERT_FALSE(S64Success);
	EXPECT_EQ(S64, Signed[i].Expected);
	} else {
	ASSERT_TRUE(S64Success);
	}
	}
	}

	} // end anonymous namespace