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tvl-depot/absl/strings/ascii_test.cc
misterg c2e7548296 Initial Commit
2017-09-19 16:54:40 -04:00

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// Copyright 2017 The Abseil Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "absl/strings/ascii.h"
#include <cctype>
#include <clocale>
#include <cstring>
#include <string>
#include "gtest/gtest.h"
#include "absl/base/macros.h"
#include "absl/base/port.h"
namespace {
TEST(AsciiIsFoo, All) {
for (int i = 0; i < 256; i++) {
if ((i >= 'a' && i <= 'z') || (i >= 'A' && i <= 'Z'))
EXPECT_TRUE(absl::ascii_isalpha(i)) << ": failed on " << i;
else
EXPECT_TRUE(!absl::ascii_isalpha(i)) << ": failed on " << i;
}
for (int i = 0; i < 256; i++) {
if ((i >= '0' && i <= '9'))
EXPECT_TRUE(absl::ascii_isdigit(i)) << ": failed on " << i;
else
EXPECT_TRUE(!absl::ascii_isdigit(i)) << ": failed on " << i;
}
for (int i = 0; i < 256; i++) {
if (absl::ascii_isalpha(i) || absl::ascii_isdigit(i))
EXPECT_TRUE(absl::ascii_isalnum(i)) << ": failed on " << i;
else
EXPECT_TRUE(!absl::ascii_isalnum(i)) << ": failed on " << i;
}
for (int i = 0; i < 256; i++) {
if (i != '\0' && strchr(" \r\n\t\v\f", i))
EXPECT_TRUE(absl::ascii_isspace(i)) << ": failed on " << i;
else
EXPECT_TRUE(!absl::ascii_isspace(i)) << ": failed on " << i;
}
for (int i = 0; i < 256; i++) {
if (i >= 32 && i < 127)
EXPECT_TRUE(absl::ascii_isprint(i)) << ": failed on " << i;
else
EXPECT_TRUE(!absl::ascii_isprint(i)) << ": failed on " << i;
}
for (int i = 0; i < 256; i++) {
if (absl::ascii_isprint(i) && !absl::ascii_isspace(i) &&
!absl::ascii_isalnum(i))
EXPECT_TRUE(absl::ascii_ispunct(i)) << ": failed on " << i;
else
EXPECT_TRUE(!absl::ascii_ispunct(i)) << ": failed on " << i;
}
for (int i = 0; i < 256; i++) {
if (i == ' ' || i == '\t')
EXPECT_TRUE(absl::ascii_isblank(i)) << ": failed on " << i;
else
EXPECT_TRUE(!absl::ascii_isblank(i)) << ": failed on " << i;
}
for (int i = 0; i < 256; i++) {
if (i < 32 || i == 127)
EXPECT_TRUE(absl::ascii_iscntrl(i)) << ": failed on " << i;
else
EXPECT_TRUE(!absl::ascii_iscntrl(i)) << ": failed on " << i;
}
for (int i = 0; i < 256; i++) {
if (absl::ascii_isdigit(i) || (i >= 'A' && i <= 'F') ||
(i >= 'a' && i <= 'f'))
EXPECT_TRUE(absl::ascii_isxdigit(i)) << ": failed on " << i;
else
EXPECT_TRUE(!absl::ascii_isxdigit(i)) << ": failed on " << i;
}
for (int i = 0; i < 256; i++) {
if (i > 32 && i < 127)
EXPECT_TRUE(absl::ascii_isgraph(i)) << ": failed on " << i;
else
EXPECT_TRUE(!absl::ascii_isgraph(i)) << ": failed on " << i;
}
for (int i = 0; i < 256; i++) {
if (i >= 'A' && i <= 'Z')
EXPECT_TRUE(absl::ascii_isupper(i)) << ": failed on " << i;
else
EXPECT_TRUE(!absl::ascii_isupper(i)) << ": failed on " << i;
}
for (int i = 0; i < 256; i++) {
if (i >= 'a' && i <= 'z')
EXPECT_TRUE(absl::ascii_islower(i)) << ": failed on " << i;
else
EXPECT_TRUE(!absl::ascii_islower(i)) << ": failed on " << i;
}
for (int i = 0; i < 128; i++) {
EXPECT_TRUE(absl::ascii_isascii(i)) << ": failed on " << i;
}
for (int i = 128; i < 256; i++) {
EXPECT_TRUE(!absl::ascii_isascii(i)) << ": failed on " << i;
}
// The official is* functions don't accept negative signed chars, but
// our absl::ascii_is* functions do.
for (int i = 0; i < 256; i++) {
signed char sc = static_cast<signed char>(static_cast<unsigned char>(i));
EXPECT_EQ(absl::ascii_isalpha(i), absl::ascii_isalpha(sc)) << i;
EXPECT_EQ(absl::ascii_isdigit(i), absl::ascii_isdigit(sc)) << i;
EXPECT_EQ(absl::ascii_isalnum(i), absl::ascii_isalnum(sc)) << i;
EXPECT_EQ(absl::ascii_isspace(i), absl::ascii_isspace(sc)) << i;
EXPECT_EQ(absl::ascii_ispunct(i), absl::ascii_ispunct(sc)) << i;
EXPECT_EQ(absl::ascii_isblank(i), absl::ascii_isblank(sc)) << i;
EXPECT_EQ(absl::ascii_iscntrl(i), absl::ascii_iscntrl(sc)) << i;
EXPECT_EQ(absl::ascii_isxdigit(i), absl::ascii_isxdigit(sc)) << i;
EXPECT_EQ(absl::ascii_isprint(i), absl::ascii_isprint(sc)) << i;
EXPECT_EQ(absl::ascii_isgraph(i), absl::ascii_isgraph(sc)) << i;
EXPECT_EQ(absl::ascii_isupper(i), absl::ascii_isupper(sc)) << i;
EXPECT_EQ(absl::ascii_islower(i), absl::ascii_islower(sc)) << i;
EXPECT_EQ(absl::ascii_isascii(i), absl::ascii_isascii(sc)) << i;
}
}
// Checks that absl::ascii_isfoo returns the same value as isfoo in the C
// locale.
TEST(AsciiIsFoo, SameAsIsFoo) {
// temporarily change locale to C. It should already be C, but just for safety
std::string old_locale = setlocale(LC_CTYPE, nullptr);
ASSERT_TRUE(setlocale(LC_CTYPE, "C"));
for (int i = 0; i < 256; i++) {
EXPECT_EQ(isalpha(i) != 0, absl::ascii_isalpha(i)) << i;
EXPECT_EQ(isdigit(i) != 0, absl::ascii_isdigit(i)) << i;
EXPECT_EQ(isalnum(i) != 0, absl::ascii_isalnum(i)) << i;
EXPECT_EQ(isspace(i) != 0, absl::ascii_isspace(i)) << i;
EXPECT_EQ(ispunct(i) != 0, absl::ascii_ispunct(i)) << i;
EXPECT_EQ(isblank(i) != 0, absl::ascii_isblank(i)) << i;
EXPECT_EQ(iscntrl(i) != 0, absl::ascii_iscntrl(i)) << i;
EXPECT_EQ(isxdigit(i) != 0, absl::ascii_isxdigit(i)) << i;
EXPECT_EQ(isprint(i) != 0, absl::ascii_isprint(i)) << i;
EXPECT_EQ(isgraph(i) != 0, absl::ascii_isgraph(i)) << i;
EXPECT_EQ(isupper(i) != 0, absl::ascii_isupper(i)) << i;
EXPECT_EQ(islower(i) != 0, absl::ascii_islower(i)) << i;
EXPECT_EQ(isascii(i) != 0, absl::ascii_isascii(i)) << i;
}
// restore the old locale.
ASSERT_TRUE(setlocale(LC_CTYPE, old_locale.c_str()));
}
TEST(AsciiToFoo, All) {
// temporarily change locale to C. It should already be C, but just for safety
std::string old_locale = setlocale(LC_CTYPE, nullptr);
ASSERT_TRUE(setlocale(LC_CTYPE, "C"));
for (int i = 0; i < 256; i++) {
if (absl::ascii_islower(i))
EXPECT_EQ(absl::ascii_toupper(i), 'A' + (i - 'a')) << i;
else
EXPECT_EQ(absl::ascii_toupper(i), static_cast<char>(i)) << i;
if (absl::ascii_isupper(i))
EXPECT_EQ(absl::ascii_tolower(i), 'a' + (i - 'A')) << i;
else
EXPECT_EQ(absl::ascii_tolower(i), static_cast<char>(i)) << i;
// These CHECKs only hold in a C locale.
EXPECT_EQ(static_cast<char>(tolower(i)), absl::ascii_tolower(i)) << i;
EXPECT_EQ(static_cast<char>(toupper(i)), absl::ascii_toupper(i)) << i;
// The official to* functions don't accept negative signed chars, but
// our absl::ascii_to* functions do.
signed char sc = static_cast<signed char>(static_cast<unsigned char>(i));
EXPECT_EQ(absl::ascii_tolower(i), absl::ascii_tolower(sc)) << i;
EXPECT_EQ(absl::ascii_toupper(i), absl::ascii_toupper(sc)) << i;
}
// restore the old locale.
ASSERT_TRUE(setlocale(LC_CTYPE, old_locale.c_str()));
}
TEST(AsciiStrTo, Lower) {
const char buf[] = "ABCDEF";
const std::string str("GHIJKL");
const std::string str2("MNOPQR");
const absl::string_view sp(str2);
EXPECT_EQ("abcdef", absl::AsciiStrToLower(buf));
EXPECT_EQ("ghijkl", absl::AsciiStrToLower(str));
EXPECT_EQ("mnopqr", absl::AsciiStrToLower(sp));
char mutable_buf[] = "Mutable";
std::transform(mutable_buf, mutable_buf + strlen(mutable_buf),
mutable_buf, absl::ascii_tolower);
EXPECT_STREQ("mutable", mutable_buf);
}
TEST(AsciiStrTo, Upper) {
const char buf[] = "abcdef";
const std::string str("ghijkl");
const std::string str2("mnopqr");
const absl::string_view sp(str2);
EXPECT_EQ("ABCDEF", absl::AsciiStrToUpper(buf));
EXPECT_EQ("GHIJKL", absl::AsciiStrToUpper(str));
EXPECT_EQ("MNOPQR", absl::AsciiStrToUpper(sp));
char mutable_buf[] = "Mutable";
std::transform(mutable_buf, mutable_buf + strlen(mutable_buf),
mutable_buf, absl::ascii_toupper);
EXPECT_STREQ("MUTABLE", mutable_buf);
}
TEST(StripLeadingAsciiWhitespace, FromStringView) {
EXPECT_EQ(absl::string_view{},
absl::StripLeadingAsciiWhitespace(absl::string_view{}));
EXPECT_EQ("foo", absl::StripLeadingAsciiWhitespace({"foo"}));
EXPECT_EQ("foo", absl::StripLeadingAsciiWhitespace({"\t \n\f\r\n\vfoo"}));
EXPECT_EQ("foo foo\n ",
absl::StripLeadingAsciiWhitespace({"\t \n\f\r\n\vfoo foo\n "}));
EXPECT_EQ(absl::string_view{}, absl::StripLeadingAsciiWhitespace(
{"\t \n\f\r\v\n\t \n\f\r\v\n"}));
}
TEST(StripLeadingAsciiWhitespace, InPlace) {
std::string str;
absl::StripLeadingAsciiWhitespace(&str);
EXPECT_EQ("", str);
str = "foo";
absl::StripLeadingAsciiWhitespace(&str);
EXPECT_EQ("foo", str);
str = "\t \n\f\r\n\vfoo";
absl::StripLeadingAsciiWhitespace(&str);
EXPECT_EQ("foo", str);
str = "\t \n\f\r\n\vfoo foo\n ";
absl::StripLeadingAsciiWhitespace(&str);
EXPECT_EQ("foo foo\n ", str);
str = "\t \n\f\r\v\n\t \n\f\r\v\n";
absl::StripLeadingAsciiWhitespace(&str);
EXPECT_EQ(absl::string_view{}, str);
}
TEST(StripTrailingAsciiWhitespace, FromStringView) {
EXPECT_EQ(absl::string_view{},
absl::StripTrailingAsciiWhitespace(absl::string_view{}));
EXPECT_EQ("foo", absl::StripTrailingAsciiWhitespace({"foo"}));
EXPECT_EQ("foo", absl::StripTrailingAsciiWhitespace({"foo\t \n\f\r\n\v"}));
EXPECT_EQ(" \nfoo foo",
absl::StripTrailingAsciiWhitespace({" \nfoo foo\t \n\f\r\n\v"}));
EXPECT_EQ(absl::string_view{}, absl::StripTrailingAsciiWhitespace(
{"\t \n\f\r\v\n\t \n\f\r\v\n"}));
}
TEST(StripTrailingAsciiWhitespace, InPlace) {
std::string str;
absl::StripTrailingAsciiWhitespace(&str);
EXPECT_EQ("", str);
str = "foo";
absl::StripTrailingAsciiWhitespace(&str);
EXPECT_EQ("foo", str);
str = "foo\t \n\f\r\n\v";
absl::StripTrailingAsciiWhitespace(&str);
EXPECT_EQ("foo", str);
str = " \nfoo foo\t \n\f\r\n\v";
absl::StripTrailingAsciiWhitespace(&str);
EXPECT_EQ(" \nfoo foo", str);
str = "\t \n\f\r\v\n\t \n\f\r\v\n";
absl::StripTrailingAsciiWhitespace(&str);
EXPECT_EQ(absl::string_view{}, str);
}
TEST(StripAsciiWhitespace, FromStringView) {
EXPECT_EQ(absl::string_view{},
absl::StripAsciiWhitespace(absl::string_view{}));
EXPECT_EQ("foo", absl::StripAsciiWhitespace({"foo"}));
EXPECT_EQ("foo",
absl::StripAsciiWhitespace({"\t \n\f\r\n\vfoo\t \n\f\r\n\v"}));
EXPECT_EQ("foo foo", absl::StripAsciiWhitespace(
{"\t \n\f\r\n\vfoo foo\t \n\f\r\n\v"}));
EXPECT_EQ(absl::string_view{},
absl::StripAsciiWhitespace({"\t \n\f\r\v\n\t \n\f\r\v\n"}));
}
TEST(StripAsciiWhitespace, InPlace) {
std::string str;
absl::StripAsciiWhitespace(&str);
EXPECT_EQ("", str);
str = "foo";
absl::StripAsciiWhitespace(&str);
EXPECT_EQ("foo", str);
str = "\t \n\f\r\n\vfoo\t \n\f\r\n\v";
absl::StripAsciiWhitespace(&str);
EXPECT_EQ("foo", str);
str = "\t \n\f\r\n\vfoo foo\t \n\f\r\n\v";
absl::StripAsciiWhitespace(&str);
EXPECT_EQ("foo foo", str);
str = "\t \n\f\r\v\n\t \n\f\r\v\n";
absl::StripAsciiWhitespace(&str);
EXPECT_EQ(absl::string_view{}, str);
}
TEST(RemoveExtraAsciiWhitespace, InPlace) {
const char* inputs[] = {"No extra space",
" Leading whitespace",
"Trailing whitespace ",
" Leading and trailing ",
" Whitespace \t in\v middle ",
"'Eeeeep! \n Newlines!\n",
"nospaces",
"",
"\n\t a\t\n\nb \t\n"};
const char* outputs[] = {
"No extra space",
"Leading whitespace",
"Trailing whitespace",
"Leading and trailing",
"Whitespace in middle",
"'Eeeeep! Newlines!",
"nospaces",
"",
"a\nb",
};
const int NUM_TESTS = ABSL_ARRAYSIZE(inputs);
for (int i = 0; i < NUM_TESTS; i++) {
std::string s(inputs[i]);
absl::RemoveExtraAsciiWhitespace(&s);
EXPECT_EQ(outputs[i], s);
}
}
} // namespace
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