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llvm-mirror/unittests/ADT/StringRefTest.cpp
Benjamin Kramer cad5b9a068 [ADT] Implicitly convert between StringRef and std::string_view when we have C++17 
This makes the types almost seamlessly interchangeable in C++17
codebases. Eventually we want to replace StringRef with the standard
type, but that requires C++17 being the default and a huge refactoring
job as StringRef has a lot more functionality.
2020-01-28 13:56:12 +01:00

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//===- llvm/unittest/ADT/StringRefTest.cpp - StringRef unit tests ---------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "llvm/ADT/StringRef.h"
#include "llvm/ADT/Hashing.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/Support/Allocator.h"
#include "llvm/Support/raw_ostream.h"
#include "gtest/gtest.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;
}
}
// Check that we can't accidentally assign a temporary std::string to a
// StringRef. (Unfortunately we can't make use of the same thing with
// constructors.)
static_assert(
!std::is_assignable<StringRef&, std::string>::value,
"Assigning from prvalue std::string");
static_assert(
!std::is_assignable<StringRef&, std::string &&>::value,
"Assigning from xvalue std::string");
static_assert(
std::is_assignable<StringRef&, std::string &>::value,
"Assigning from lvalue std::string");
static_assert(
std::is_assignable<StringRef&, const char *>::value,
"Assigning from prvalue C string");
static_assert(
std::is_assignable<StringRef&, const char * &&>::value,
"Assigning from xvalue C string");
static_assert(
std::is_assignable<StringRef&, const char * &>::value,
"Assigning from lvalue C string");
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")));
#if __cplusplus > 201402L
EXPECT_EQ("hello", StringRef(std::string_view("hello")));
#endif
}
TEST(StringRefTest, Conversion) {
EXPECT_EQ("hello", std::string(StringRef("hello")));
#if __cplusplus > 201402L
EXPECT_EQ("hello", std::string_view(StringRef("hello")));
#endif
}
TEST(StringRefTest, EmptyInitializerList) {
StringRef S = {};
EXPECT_TRUE(S.empty());
S = {};
EXPECT_TRUE(S.empty());
}
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("bb"));
EXPECT_EQ( 1, StringRef("aaBb").compare_lower("AaB"));
EXPECT_EQ( 1, StringRef("bb").compare_lower("AaB"));
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'));
EXPECT_EQ(std::make_pair(StringRef("he"), StringRef("o")),
Str.rsplit("ll"));
EXPECT_EQ(std::make_pair(StringRef(""), StringRef("ello")),
Str.rsplit("h"));
EXPECT_EQ(std::make_pair(StringRef("hell"), StringRef("")),
Str.rsplit("o"));
EXPECT_EQ(std::make_pair(StringRef("hello"), StringRef("")),
Str.rsplit("::"));
EXPECT_EQ(std::make_pair(StringRef("hel"), StringRef("o")),
Str.rsplit("l"));
}
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);
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);
expected.clear(); parts.clear();
expected.push_back("");
StringRef().split(parts, ",", 0, true);
EXPECT_TRUE(parts == expected);
expected.clear(); parts.clear();
expected.push_back(StringRef());
StringRef("").split(parts, ",", 0, true);
EXPECT_TRUE(parts == expected);
expected.clear(); parts.clear();
StringRef("").split(parts, ",", 0, false);
EXPECT_TRUE(parts == expected);
StringRef().split(parts, ",", 0, false);
EXPECT_TRUE(parts == expected);
expected.clear(); parts.clear();
expected.push_back("a");
expected.push_back("");
expected.push_back("b");
expected.push_back("c,d");
StringRef("a,,b,c,d").split(parts, ",", 3, true);
EXPECT_TRUE(parts == expected);
expected.clear(); parts.clear();
expected.push_back("");
StringRef().split(parts, ',', 0, true);
EXPECT_TRUE(parts == expected);
expected.clear(); parts.clear();
expected.push_back(StringRef());
StringRef("").split(parts, ',', 0, true);
EXPECT_TRUE(parts == expected);
expected.clear(); parts.clear();
StringRef("").split(parts, ',', 0, false);
EXPECT_TRUE(parts == expected);
StringRef().split(parts, ',', 0, false);
EXPECT_TRUE(parts == expected);
expected.clear(); parts.clear();
expected.push_back("a");
expected.push_back("");
expected.push_back("b");
expected.push_back("c,d");
StringRef("a,,b,c,d").split(parts, ',', 3, true);
EXPECT_TRUE(parts == expected);
}
TEST(StringRefTest, Trim) {
StringRef Str0("hello");
StringRef Str1(" hello ");
StringRef Str2(" hello ");
StringRef Str3("\t\n\v\f\r hello \t\n\v\f\r");
EXPECT_EQ(StringRef("hello"), Str0.rtrim());
EXPECT_EQ(StringRef(" hello"), Str1.rtrim());
EXPECT_EQ(StringRef(" hello"), Str2.rtrim());
EXPECT_EQ(StringRef("\t\n\v\f\r hello"), Str3.rtrim());
EXPECT_EQ(StringRef("hello"), Str0.ltrim());
EXPECT_EQ(StringRef("hello "), Str1.ltrim());
EXPECT_EQ(StringRef("hello "), Str2.ltrim());
EXPECT_EQ(StringRef("hello \t\n\v\f\r"), Str3.ltrim());
EXPECT_EQ(StringRef("hello"), Str0.trim());
EXPECT_EQ(StringRef("hello"), Str1.trim());
EXPECT_EQ(StringRef("hello"), Str2.trim());
EXPECT_EQ(StringRef("hello"), Str3.trim());
EXPECT_EQ(StringRef("ello"), Str0.trim("hhhhhhhhhhh"));
EXPECT_EQ(StringRef(""), StringRef("").trim());
EXPECT_EQ(StringRef(""), StringRef(" ").trim());
EXPECT_EQ(StringRef("\0", 1), StringRef(" \0 ", 3).trim());
EXPECT_EQ(StringRef("\0\0", 2), StringRef("\0\0", 2).trim());
EXPECT_EQ(StringRef("x"), StringRef("\0\0x\0\0", 5).trim('\0'));
}
TEST(StringRefTest, StartsWith) {
StringRef Str("hello");
EXPECT_TRUE(Str.startswith(""));
EXPECT_TRUE(Str.startswith("he"));
EXPECT_FALSE(Str.startswith("helloworld"));
EXPECT_FALSE(Str.startswith("hi"));
}
TEST(StringRefTest, StartsWithLower) {
StringRef Str("heLLo");
EXPECT_TRUE(Str.startswith_lower(""));
EXPECT_TRUE(Str.startswith_lower("he"));
EXPECT_TRUE(Str.startswith_lower("hell"));
EXPECT_TRUE(Str.startswith_lower("HELlo"));
EXPECT_FALSE(Str.startswith_lower("helloworld"));
EXPECT_FALSE(Str.startswith_lower("hi"));
}
TEST(StringRefTest, ConsumeFront) {
StringRef Str("hello");
EXPECT_TRUE(Str.consume_front(""));
EXPECT_EQ("hello", Str);
EXPECT_TRUE(Str.consume_front("he"));
EXPECT_EQ("llo", Str);
EXPECT_FALSE(Str.consume_front("lloworld"));
EXPECT_EQ("llo", Str);
EXPECT_FALSE(Str.consume_front("lol"));
EXPECT_EQ("llo", Str);
EXPECT_TRUE(Str.consume_front("llo"));
EXPECT_EQ("", Str);
EXPECT_FALSE(Str.consume_front("o"));
EXPECT_TRUE(Str.consume_front(""));
}
TEST(StringRefTest, EndsWith) {
StringRef Str("hello");
EXPECT_TRUE(Str.endswith(""));
EXPECT_TRUE(Str.endswith("lo"));
EXPECT_FALSE(Str.endswith("helloworld"));
EXPECT_FALSE(Str.endswith("worldhello"));
EXPECT_FALSE(Str.endswith("so"));
}
TEST(StringRefTest, EndsWithLower) {
StringRef Str("heLLo");
EXPECT_TRUE(Str.endswith_lower(""));
EXPECT_TRUE(Str.endswith_lower("lo"));
EXPECT_TRUE(Str.endswith_lower("LO"));
EXPECT_TRUE(Str.endswith_lower("ELlo"));
EXPECT_FALSE(Str.endswith_lower("helloworld"));
EXPECT_FALSE(Str.endswith_lower("hi"));
}
TEST(StringRefTest, ConsumeBack) {
StringRef Str("hello");
EXPECT_TRUE(Str.consume_back(""));
EXPECT_EQ("hello", Str);
EXPECT_TRUE(Str.consume_back("lo"));
EXPECT_EQ("hel", Str);
EXPECT_FALSE(Str.consume_back("helhel"));
EXPECT_EQ("hel", Str);
EXPECT_FALSE(Str.consume_back("hle"));
EXPECT_EQ("hel", Str);
EXPECT_TRUE(Str.consume_back("hel"));
EXPECT_EQ("", Str);
EXPECT_FALSE(Str.consume_back("h"));
EXPECT_TRUE(Str.consume_back(""));
}
TEST(StringRefTest, Find) {
StringRef Str("helloHELLO");
StringRef LongStr("hellx xello hell ello world foo bar hello HELLO");
struct {
StringRef Str;
char C;
std::size_t From;
std::size_t Pos;
std::size_t LowerPos;
} CharExpectations[] = {
{Str, 'h', 0U, 0U, 0U},
{Str, 'e', 0U, 1U, 1U},
{Str, 'l', 0U, 2U, 2U},
{Str, 'l', 3U, 3U, 3U},
{Str, 'o', 0U, 4U, 4U},
{Str, 'L', 0U, 7U, 2U},
{Str, 'z', 0U, StringRef::npos, StringRef::npos},
};
struct {
StringRef Str;
llvm::StringRef S;
std::size_t From;
std::size_t Pos;
std::size_t LowerPos;
} StrExpectations[] = {
{Str, "helloword", 0, StringRef::npos, StringRef::npos},
{Str, "hello", 0, 0U, 0U},
{Str, "ello", 0, 1U, 1U},
{Str, "zz", 0, StringRef::npos, StringRef::npos},
{Str, "ll", 2U, 2U, 2U},
{Str, "ll", 3U, StringRef::npos, 7U},
{Str, "LL", 2U, 7U, 2U},
{Str, "LL", 3U, 7U, 7U},
{Str, "", 0U, 0U, 0U},
{LongStr, "hello", 0U, 36U, 36U},
{LongStr, "foo", 0U, 28U, 28U},
{LongStr, "hell", 2U, 12U, 12U},
{LongStr, "HELL", 2U, 42U, 12U},
{LongStr, "", 0U, 0U, 0U}};
for (auto &E : CharExpectations) {
EXPECT_EQ(E.Pos, E.Str.find(E.C, E.From));
EXPECT_EQ(E.LowerPos, E.Str.find_lower(E.C, E.From));
EXPECT_EQ(E.LowerPos, E.Str.find_lower(toupper(E.C), E.From));
}
for (auto &E : StrExpectations) {
EXPECT_EQ(E.Pos, E.Str.find(E.S, E.From));
EXPECT_EQ(E.LowerPos, E.Str.find_lower(E.S, E.From));
EXPECT_EQ(E.LowerPos, E.Str.find_lower(E.S.upper(), E.From));
}
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(8U, Str.rfind_lower('l'));
EXPECT_EQ(8U, Str.rfind_lower('L'));
EXPECT_EQ(StringRef::npos, Str.rfind_lower('z'));
EXPECT_EQ(StringRef::npos, Str.rfind_lower("HELLOWORLD"));
EXPECT_EQ(5U, Str.rfind("HELLO"));
EXPECT_EQ(6U, 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"));
Str = "hello";
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"));
EXPECT_EQ(3U, Str.find_last_not_of('o'));
EXPECT_EQ(1U, Str.find_last_not_of("lo"));
EXPECT_EQ(StringRef::npos, Str.find_last_not_of("helo"));
}
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"));
EXPECT_EQ(0U, Str.count(""));
StringRef OverlappingAbba("abbabba");
EXPECT_EQ(1U, OverlappingAbba.count("abba"));
StringRef NonOverlappingAbba("abbaabba");
EXPECT_EQ(2U, NonOverlappingAbba.count("abba"));
StringRef ComplexAbba("abbabbaxyzabbaxyz");
EXPECT_EQ(2U, ComplexAbba.count("abba"));
}
TEST(StringRefTest, EditDistance) {
StringRef Hello("hello");
EXPECT_EQ(2U, Hello.edit_distance("hill"));
StringRef Industry("industry");
EXPECT_EQ(6U, Industry.edit_distance("interest"));
StringRef Soylent("soylent green is people");
EXPECT_EQ(19U, Soylent.edit_distance("people soiled our green"));
EXPECT_EQ(26U, Soylent.edit_distance("people soiled our green",
/* allow replacements = */ false));
EXPECT_EQ(9U, Soylent.edit_distance("people soiled our green",
/* allow replacements = */ true,
/* max edit distance = */ 8));
EXPECT_EQ(53U, Soylent.edit_distance("people soiled our green "
"people soiled our green "
"people soiled our green "));
}
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);
}
}
}
static const char* BadStrings[] = {
"" // empty string
, "18446744073709551617" // value just over max
, "123456789012345678901" // value way too large
, "4t23v" // illegal decimal characters
, "0x123W56" // illegal hex characters
, "0b2" // illegal bin characters
, "08" // illegal oct characters
, "0o8" // illegal oct characters
, "-123" // negative unsigned value
, "0x"
, "0b"
};
TEST(StringRefTest, getAsUnsignedIntegerBadStrings) {
unsigned long long U64;
for (size_t i = 0; i < array_lengthof(BadStrings); ++i) {
bool IsBadNumber = StringRef(BadStrings[i]).getAsInteger(0, U64);
ASSERT_TRUE(IsBadNumber);
}
}
struct ConsumeUnsignedPair {
const char *Str;
uint64_t Expected;
const char *Leftover;
} ConsumeUnsigned[] = {
{"0", 0, ""},
{"255", 255, ""},
{"256", 256, ""},
{"65535", 65535, ""},
{"65536", 65536, ""},
{"4294967295", 4294967295ULL, ""},
{"4294967296", 4294967296ULL, ""},
{"255A376", 255, "A376"},
{"18446744073709551615", 18446744073709551615ULL, ""},
{"18446744073709551615ABC", 18446744073709551615ULL, "ABC"},
{"042", 34, ""},
{"0x42", 66, ""},
{"0x42-0x34", 66, "-0x34"},
{"0b101010", 42, ""},
{"0429F", 042, "9F"}, // Auto-sensed octal radix, invalid digit
{"0x42G12", 0x42, "G12"}, // Auto-sensed hex radix, invalid digit
{"0b10101020101", 42, "20101"}}; // Auto-sensed binary radix, invalid digit.
struct ConsumeSignedPair {
const char *Str;
int64_t Expected;
const char *Leftover;
} ConsumeSigned[] = {
{"0", 0, ""},
{"-0", 0, ""},
{"0-1", 0, "-1"},
{"-0-1", 0, "-1"},
{"127", 127, ""},
{"128", 128, ""},
{"127-1", 127, "-1"},
{"128-1", 128, "-1"},
{"-128", -128, ""},
{"-129", -129, ""},
{"-128-1", -128, "-1"},
{"-129-1", -129, "-1"},
{"32767", 32767, ""},
{"32768", 32768, ""},
{"32767-1", 32767, "-1"},
{"32768-1", 32768, "-1"},
{"-32768", -32768, ""},
{"-32769", -32769, ""},
{"-32768-1", -32768, "-1"},
{"-32769-1", -32769, "-1"},
{"2147483647", 2147483647LL, ""},
{"2147483648", 2147483648LL, ""},
{"2147483647-1", 2147483647LL, "-1"},
{"2147483648-1", 2147483648LL, "-1"},
{"-2147483648", -2147483648LL, ""},
{"-2147483649", -2147483649LL, ""},
{"-2147483648-1", -2147483648LL, "-1"},
{"-2147483649-1", -2147483649LL, "-1"},
{"-9223372036854775808", -(9223372036854775807LL) - 1, ""},
{"-9223372036854775808-1", -(9223372036854775807LL) - 1, "-1"},
{"042", 34, ""},
{"042-1", 34, "-1"},
{"0x42", 66, ""},
{"0x42-1", 66, "-1"},
{"0b101010", 42, ""},
{"0b101010-1", 42, "-1"},
{"-042", -34, ""},
{"-042-1", -34, "-1"},
{"-0x42", -66, ""},
{"-0x42-1", -66, "-1"},
{"-0b101010", -42, ""},
{"-0b101010-1", -42, "-1"}};
TEST(StringRefTest, consumeIntegerUnsigned) {
uint8_t U8;
uint16_t U16;
uint32_t U32;
uint64_t U64;
for (size_t i = 0; i < array_lengthof(ConsumeUnsigned); ++i) {
StringRef Str = ConsumeUnsigned[i].Str;
bool U8Success = Str.consumeInteger(0, U8);
if (static_cast<uint8_t>(ConsumeUnsigned[i].Expected) ==
ConsumeUnsigned[i].Expected) {
ASSERT_FALSE(U8Success);
EXPECT_EQ(U8, ConsumeUnsigned[i].Expected);
EXPECT_EQ(Str, ConsumeUnsigned[i].Leftover);
} else {
ASSERT_TRUE(U8Success);
}
Str = ConsumeUnsigned[i].Str;
bool U16Success = Str.consumeInteger(0, U16);
if (static_cast<uint16_t>(ConsumeUnsigned[i].Expected) ==
ConsumeUnsigned[i].Expected) {
ASSERT_FALSE(U16Success);
EXPECT_EQ(U16, ConsumeUnsigned[i].Expected);
EXPECT_EQ(Str, ConsumeUnsigned[i].Leftover);
} else {
ASSERT_TRUE(U16Success);
}
Str = ConsumeUnsigned[i].Str;
bool U32Success = Str.consumeInteger(0, U32);
if (static_cast<uint32_t>(ConsumeUnsigned[i].Expected) ==
ConsumeUnsigned[i].Expected) {
ASSERT_FALSE(U32Success);
EXPECT_EQ(U32, ConsumeUnsigned[i].Expected);
EXPECT_EQ(Str, ConsumeUnsigned[i].Leftover);
} else {
ASSERT_TRUE(U32Success);
}
Str = ConsumeUnsigned[i].Str;
bool U64Success = Str.consumeInteger(0, U64);
if (static_cast<uint64_t>(ConsumeUnsigned[i].Expected) ==
ConsumeUnsigned[i].Expected) {
ASSERT_FALSE(U64Success);
EXPECT_EQ(U64, ConsumeUnsigned[i].Expected);
EXPECT_EQ(Str, ConsumeUnsigned[i].Leftover);
} else {
ASSERT_TRUE(U64Success);
}
}
}
TEST(StringRefTest, consumeIntegerSigned) {
int8_t S8;
int16_t S16;
int32_t S32;
int64_t S64;
for (size_t i = 0; i < array_lengthof(ConsumeSigned); ++i) {
StringRef Str = ConsumeSigned[i].Str;
bool S8Success = Str.consumeInteger(0, S8);
if (static_cast<int8_t>(ConsumeSigned[i].Expected) ==
ConsumeSigned[i].Expected) {
ASSERT_FALSE(S8Success);
EXPECT_EQ(S8, ConsumeSigned[i].Expected);
EXPECT_EQ(Str, ConsumeSigned[i].Leftover);
} else {
ASSERT_TRUE(S8Success);
}
Str = ConsumeSigned[i].Str;
bool S16Success = Str.consumeInteger(0, S16);
if (static_cast<int16_t>(ConsumeSigned[i].Expected) ==
ConsumeSigned[i].Expected) {
ASSERT_FALSE(S16Success);
EXPECT_EQ(S16, ConsumeSigned[i].Expected);
EXPECT_EQ(Str, ConsumeSigned[i].Leftover);
} else {
ASSERT_TRUE(S16Success);
}
Str = ConsumeSigned[i].Str;
bool S32Success = Str.consumeInteger(0, S32);
if (static_cast<int32_t>(ConsumeSigned[i].Expected) ==
ConsumeSigned[i].Expected) {
ASSERT_FALSE(S32Success);
EXPECT_EQ(S32, ConsumeSigned[i].Expected);
EXPECT_EQ(Str, ConsumeSigned[i].Leftover);
} else {
ASSERT_TRUE(S32Success);
}
Str = ConsumeSigned[i].Str;
bool S64Success = Str.consumeInteger(0, S64);
if (static_cast<int64_t>(ConsumeSigned[i].Expected) ==
ConsumeSigned[i].Expected) {
ASSERT_FALSE(S64Success);
EXPECT_EQ(S64, ConsumeSigned[i].Expected);
EXPECT_EQ(Str, ConsumeSigned[i].Leftover);
} else {
ASSERT_TRUE(S64Success);
}
}
}
struct GetDoubleStrings {
const char *Str;
bool AllowInexact;
bool ShouldFail;
double D;
} DoubleStrings[] = {{"0", false, false, 0.0},
{"0.0", false, false, 0.0},
{"-0.0", false, false, -0.0},
{"123.45", false, true, 123.45},
{"123.45", true, false, 123.45},
{"1.8e308", true, false, std::numeric_limits<double>::infinity()},
{"1.8e308", false, true, std::numeric_limits<double>::infinity()},
{"0x0.0000000000001P-1023", false, true, 0.0},
{"0x0.0000000000001P-1023", true, false, 0.0},
};
TEST(StringRefTest, getAsDouble) {
for (const auto &Entry : DoubleStrings) {
double Result;
StringRef S(Entry.Str);
EXPECT_EQ(Entry.ShouldFail, S.getAsDouble(Result, Entry.AllowInexact));
if (!Entry.ShouldFail) {
EXPECT_EQ(Result, Entry.D);
}
}
}
static const char *join_input[] = { "a", "b", "c" };
static const char join_result1[] = "a";
static const char join_result2[] = "a:b:c";
static const char join_result3[] = "a::b::c";
TEST(StringRefTest, joinStrings) {
std::vector<StringRef> v1;
std::vector<std::string> v2;
for (size_t i = 0; i < array_lengthof(join_input); ++i) {
v1.push_back(join_input[i]);
v2.push_back(join_input[i]);
}
bool v1_join1 = join(v1.begin(), v1.begin() + 1, ":") == join_result1;
EXPECT_TRUE(v1_join1);
bool v1_join2 = join(v1.begin(), v1.end(), ":") == join_result2;
EXPECT_TRUE(v1_join2);
bool v1_join3 = join(v1.begin(), v1.end(), "::") == join_result3;
EXPECT_TRUE(v1_join3);
bool v2_join1 = join(v2.begin(), v2.begin() + 1, ":") == join_result1;
EXPECT_TRUE(v2_join1);
bool v2_join2 = join(v2.begin(), v2.end(), ":") == join_result2;
EXPECT_TRUE(v2_join2);
bool v2_join3 = join(v2.begin(), v2.end(), "::") == join_result3;
EXPECT_TRUE(v2_join3);
v2_join3 = join(v2, "::") == join_result3;
EXPECT_TRUE(v2_join3);
}
TEST(StringRefTest, AllocatorCopy) {
BumpPtrAllocator Alloc;
// First test empty strings. We don't want these to allocate anything on the
// allocator.
StringRef StrEmpty = "";
StringRef StrEmptyc = StrEmpty.copy(Alloc);
EXPECT_TRUE(StrEmpty.equals(StrEmptyc));
EXPECT_EQ(StrEmptyc.data(), nullptr);
EXPECT_EQ(StrEmptyc.size(), 0u);
EXPECT_EQ(Alloc.getTotalMemory(), 0u);
StringRef Str1 = "hello";
StringRef Str2 = "bye";
StringRef Str1c = Str1.copy(Alloc);
StringRef Str2c = Str2.copy(Alloc);
EXPECT_TRUE(Str1.equals(Str1c));
EXPECT_NE(Str1.data(), Str1c.data());
EXPECT_TRUE(Str2.equals(Str2c));
EXPECT_NE(Str2.data(), Str2c.data());
}
TEST(StringRefTest, Drop) {
StringRef Test("StringRefTest::Drop");
StringRef Dropped = Test.drop_front(5);
EXPECT_EQ(Dropped, "gRefTest::Drop");
Dropped = Test.drop_back(5);
EXPECT_EQ(Dropped, "StringRefTest:");
Dropped = Test.drop_front(0);
EXPECT_EQ(Dropped, Test);
Dropped = Test.drop_back(0);
EXPECT_EQ(Dropped, Test);
Dropped = Test.drop_front(Test.size());
EXPECT_TRUE(Dropped.empty());
Dropped = Test.drop_back(Test.size());
EXPECT_TRUE(Dropped.empty());
}
TEST(StringRefTest, Take) {
StringRef Test("StringRefTest::Take");
StringRef Taken = Test.take_front(5);
EXPECT_EQ(Taken, "Strin");
Taken = Test.take_back(5);
EXPECT_EQ(Taken, ":Take");
Taken = Test.take_front(Test.size());
EXPECT_EQ(Taken, Test);
Taken = Test.take_back(Test.size());
EXPECT_EQ(Taken, Test);
Taken = Test.take_front(0);
EXPECT_TRUE(Taken.empty());
Taken = Test.take_back(0);
EXPECT_TRUE(Taken.empty());
}
TEST(StringRefTest, FindIf) {
StringRef Punct("Test.String");
StringRef NoPunct("ABCDEFG");
StringRef Empty;
auto IsPunct = [](char c) { return ::ispunct(c); };
auto IsAlpha = [](char c) { return ::isalpha(c); };
EXPECT_EQ(4U, Punct.find_if(IsPunct));
EXPECT_EQ(StringRef::npos, NoPunct.find_if(IsPunct));
EXPECT_EQ(StringRef::npos, Empty.find_if(IsPunct));
EXPECT_EQ(4U, Punct.find_if_not(IsAlpha));
EXPECT_EQ(StringRef::npos, NoPunct.find_if_not(IsAlpha));
EXPECT_EQ(StringRef::npos, Empty.find_if_not(IsAlpha));
}
TEST(StringRefTest, TakeWhileUntil) {
StringRef Test("String With 1 Number");
StringRef Taken = Test.take_while([](char c) { return ::isdigit(c); });
EXPECT_EQ("", Taken);
Taken = Test.take_until([](char c) { return ::isdigit(c); });
EXPECT_EQ("String With ", Taken);
Taken = Test.take_while([](char c) { return true; });
EXPECT_EQ(Test, Taken);
Taken = Test.take_until([](char c) { return true; });
EXPECT_EQ("", Taken);
Test = "";
Taken = Test.take_while([](char c) { return true; });
EXPECT_EQ("", Taken);
}
TEST(StringRefTest, DropWhileUntil) {
StringRef Test("String With 1 Number");
StringRef Taken = Test.drop_while([](char c) { return ::isdigit(c); });
EXPECT_EQ(Test, Taken);
Taken = Test.drop_until([](char c) { return ::isdigit(c); });
EXPECT_EQ("1 Number", Taken);
Taken = Test.drop_while([](char c) { return true; });
EXPECT_EQ("", Taken);
Taken = Test.drop_until([](char c) { return true; });
EXPECT_EQ(Test, Taken);
StringRef EmptyString = "";
Taken = EmptyString.drop_while([](char c) { return true; });
EXPECT_EQ("", Taken);
}
TEST(StringRefTest, StringLiteral) {
constexpr StringRef StringRefs[] = {"Foo", "Bar"};
EXPECT_EQ(StringRef("Foo"), StringRefs[0]);
EXPECT_EQ(StringRef("Bar"), StringRefs[1]);
constexpr StringLiteral Strings[] = {"Foo", "Bar"};
EXPECT_EQ(StringRef("Foo"), Strings[0]);
EXPECT_EQ(StringRef("Bar"), Strings[1]);
}
// Check gtest prints StringRef as a string instead of a container of chars.
// The code is in utils/unittest/googletest/internal/custom/gtest-printers.h
TEST(StringRefTest, GTestPrinter) {
EXPECT_EQ(R"("foo")", ::testing::PrintToString(StringRef("foo")));
}
static_assert(is_trivially_copyable<StringRef>::value, "trivially copyable");
} // end anonymous namespace
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