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c-resources/CPlusPlus20ForProgrammers-m.../examples/libraries/fmt/test/os-test.cc

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// Formatting library for C++ - tests of the OS-specific functionality
//
// Copyright (c) 2012 - present, Victor Zverovich
// All rights reserved.
//
// For the license information refer to format.h.
#include "fmt/os.h"
#include <cstdlib> // std::exit
#include <cstring>
#include <memory>
#include "gtest-extra.h"
#include "util.h"
#ifdef fileno
# undef fileno
#endif
using fmt::buffered_file;
using testing::HasSubstr;
using wstring_view = fmt::basic_string_view<wchar_t>;
#ifdef _WIN32
# include <windows.h>
TEST(util_test, utf16_to_utf8) {
auto s = std::string("ёжик");
fmt::detail::utf16_to_utf8 u(L"\x0451\x0436\x0438\x043A");
EXPECT_EQ(s, u.str());
EXPECT_EQ(s.size(), u.size());
}
TEST(util_test, utf16_to_utf8_empty_string) {
std::string s = "";
fmt::detail::utf16_to_utf8 u(L"");
EXPECT_EQ(s, u.str());
EXPECT_EQ(s.size(), u.size());
}
template <typename Converter, typename Char>
void check_utf_conversion_error(const char* message,
fmt::basic_string_view<Char> str =
fmt::basic_string_view<Char>(nullptr, 1)) {
fmt::memory_buffer out;
fmt::detail::format_windows_error(out, ERROR_INVALID_PARAMETER, message);
auto error = std::system_error(std::error_code());
try {
(Converter)(str);
} catch (const std::system_error& e) {
error = e;
}
EXPECT_EQ(ERROR_INVALID_PARAMETER, error.code().value());
EXPECT_THAT(error.what(), HasSubstr(fmt::to_string(out)));
}
TEST(util_test, utf16_to_utf8_error) {
check_utf_conversion_error<fmt::detail::utf16_to_utf8, wchar_t>(
"cannot convert string from UTF-16 to UTF-8");
}
TEST(util_test, utf16_to_utf8_convert) {
fmt::detail::utf16_to_utf8 u;
EXPECT_EQ(ERROR_INVALID_PARAMETER, u.convert(wstring_view(nullptr, 1)));
EXPECT_EQ(ERROR_INVALID_PARAMETER,
u.convert(wstring_view(L"foo", INT_MAX + 1u)));
}
TEST(os_test, format_std_error_code) {
EXPECT_EQ("generic:42",
fmt::format(FMT_STRING("{0}"),
std::error_code(42, std::generic_category())));
EXPECT_EQ("system:42",
fmt::format(FMT_STRING("{0}"),
std::error_code(42, fmt::system_category())));
EXPECT_EQ("system:-42",
fmt::format(FMT_STRING("{0}"),
std::error_code(-42, fmt::system_category())));
}
TEST(os_test, format_windows_error) {
LPWSTR message = nullptr;
auto result = FormatMessageW(
FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM |
FORMAT_MESSAGE_IGNORE_INSERTS,
nullptr, ERROR_FILE_EXISTS, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
reinterpret_cast<LPWSTR>(&message), 0, nullptr);
fmt::detail::utf16_to_utf8 utf8_message(wstring_view(message, result - 2));
LocalFree(message);
fmt::memory_buffer actual_message;
fmt::detail::format_windows_error(actual_message, ERROR_FILE_EXISTS, "test");
EXPECT_EQ(fmt::format("test: {}", utf8_message.str()),
fmt::to_string(actual_message));
actual_message.resize(0);
}
TEST(os_test, format_long_windows_error) {
LPWSTR message = nullptr;
// this error code is not available on all Windows platforms and
// Windows SDKs, so do not fail the test if the error string cannot
// be retrieved.
int provisioning_not_allowed = 0x80284013L; // TBS_E_PROVISIONING_NOT_ALLOWED
auto result = FormatMessageW(
FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM |
FORMAT_MESSAGE_IGNORE_INSERTS,
nullptr, static_cast<DWORD>(provisioning_not_allowed),
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
reinterpret_cast<LPWSTR>(&message), 0, nullptr);
if (result == 0) {
LocalFree(message);
return;
}
fmt::detail::utf16_to_utf8 utf8_message(wstring_view(message, result - 2));
LocalFree(message);
fmt::memory_buffer actual_message;
fmt::detail::format_windows_error(actual_message, provisioning_not_allowed,
"test");
EXPECT_EQ(fmt::format("test: {}", utf8_message.str()),
fmt::to_string(actual_message));
}
TEST(os_test, windows_error) {
auto error = std::system_error(std::error_code());
try {
throw fmt::windows_error(ERROR_FILE_EXISTS, "test {}", "error");
} catch (const std::system_error& e) {
error = e;
}
fmt::memory_buffer message;
fmt::detail::format_windows_error(message, ERROR_FILE_EXISTS, "test error");
EXPECT_THAT(error.what(), HasSubstr(to_string(message)));
EXPECT_EQ(ERROR_FILE_EXISTS, error.code().value());
}
TEST(os_test, report_windows_error) {
fmt::memory_buffer out;
fmt::detail::format_windows_error(out, ERROR_FILE_EXISTS, "test error");
out.push_back('\n');
EXPECT_WRITE(stderr,
fmt::report_windows_error(ERROR_FILE_EXISTS, "test error"),
fmt::to_string(out));
}
#endif // _WIN32
#if FMT_USE_FCNTL
using fmt::file;
bool isclosed(int fd) {
char buffer;
auto result = std::streamsize();
SUPPRESS_ASSERT(result = FMT_POSIX(read(fd, &buffer, 1)));
return result == -1 && errno == EBADF;
}
// Opens a file for reading.
file open_file() {
file read_end, write_end;
file::pipe(read_end, write_end);
write_end.write(file_content, std::strlen(file_content));
write_end.close();
return read_end;
}
// Attempts to write a string to a file.
void write(file& f, fmt::string_view s) {
size_t num_chars_left = s.size();
const char* ptr = s.data();
do {
size_t count = f.write(ptr, num_chars_left);
ptr += count;
// We can't write more than size_t bytes since num_chars_left
// has type size_t.
num_chars_left -= count;
} while (num_chars_left != 0);
}
TEST(buffered_file_test, default_ctor) {
auto f = buffered_file();
EXPECT_TRUE(f.get() == nullptr);
}
TEST(buffered_file_test, move_ctor) {
buffered_file bf = open_buffered_file();
FILE* fp = bf.get();
EXPECT_TRUE(fp != nullptr);
buffered_file bf2(std::move(bf));
EXPECT_EQ(fp, bf2.get());
EXPECT_TRUE(bf.get() == nullptr);
}
TEST(buffered_file_test, move_assignment) {
buffered_file bf = open_buffered_file();
FILE* fp = bf.get();
EXPECT_TRUE(fp != nullptr);
buffered_file bf2;
bf2 = std::move(bf);
EXPECT_EQ(fp, bf2.get());
EXPECT_TRUE(bf.get() == nullptr);
}
TEST(buffered_file_test, move_assignment_closes_file) {
buffered_file bf = open_buffered_file();
buffered_file bf2 = open_buffered_file();
int old_fd = bf2.fileno();
bf2 = std::move(bf);
EXPECT_TRUE(isclosed(old_fd));
}
TEST(buffered_file_test, move_from_temporary_in_ctor) {
FILE* fp = nullptr;
buffered_file f = open_buffered_file(&fp);
EXPECT_EQ(fp, f.get());
}
TEST(buffered_file_test, move_from_temporary_in_assignment) {
FILE* fp = nullptr;
auto f = buffered_file();
f = open_buffered_file(&fp);
EXPECT_EQ(fp, f.get());
}
TEST(buffered_file_test, move_from_temporary_in_assignment_closes_file) {
buffered_file f = open_buffered_file();
int old_fd = f.fileno();
f = open_buffered_file();
EXPECT_TRUE(isclosed(old_fd));
}
TEST(buffered_file_test, close_file_in_dtor) {
int fd = 0;
{
buffered_file f = open_buffered_file();
fd = f.fileno();
}
EXPECT_TRUE(isclosed(fd));
}
TEST(buffered_file_test, close_error_in_dtor) {
auto f =
std::unique_ptr<buffered_file>(new buffered_file(open_buffered_file()));
EXPECT_WRITE(
stderr,
{
// The close function must be called inside EXPECT_WRITE,
// otherwise the system may recycle closed file descriptor when
// redirecting the output in EXPECT_STDERR and the second close
// will break output redirection.
FMT_POSIX(close(f->fileno()));
SUPPRESS_ASSERT(f.reset(nullptr));
},
system_error_message(EBADF, "cannot close file") + "\n");
}
TEST(buffered_file_test, close) {
buffered_file f = open_buffered_file();
int fd = f.fileno();
f.close();
EXPECT_TRUE(f.get() == nullptr);
EXPECT_TRUE(isclosed(fd));
}
TEST(buffered_file_test, close_error) {
buffered_file f = open_buffered_file();
FMT_POSIX(close(f.fileno()));
EXPECT_SYSTEM_ERROR_NOASSERT(f.close(), EBADF, "cannot close file");
EXPECT_TRUE(f.get() == nullptr);
}
TEST(buffered_file_test, fileno) {
auto f = open_buffered_file();
EXPECT_TRUE(f.fileno() != -1);
file copy = file::dup(f.fileno());
EXPECT_READ(copy, file_content);
}
TEST(ostream_test, move) {
fmt::ostream out = fmt::output_file("test-file");
fmt::ostream moved(std::move(out));
moved.print("hello");
}
TEST(ostream_test, move_while_holding_data) {
{
fmt::ostream out = fmt::output_file("test-file");
out.print("Hello, ");
fmt::ostream moved(std::move(out));
moved.print("world!\n");
}
{
file in("test-file", file::RDONLY);
EXPECT_READ(in, "Hello, world!\n");
}
}
TEST(ostream_test, print) {
fmt::ostream out = fmt::output_file("test-file");
out.print("The answer is {}.\n",
fmt::join(std::initializer_list<int>{42}, ", "));
out.close();
file in("test-file", file::RDONLY);
EXPECT_READ(in, "The answer is 42.\n");
}
TEST(ostream_test, buffer_boundary) {
auto str = std::string(4096, 'x');
fmt::ostream out = fmt::output_file("test-file");
out.print("{}", str);
out.print("{}", str);
out.close();
file in("test-file", file::RDONLY);
EXPECT_READ(in, str + str);
}
TEST(ostream_test, buffer_size) {
fmt::ostream out = fmt::output_file("test-file", fmt::buffer_size = 1);
out.print("{}", "foo");
out.close();
file in("test-file", file::RDONLY);
EXPECT_READ(in, "foo");
}
TEST(ostream_test, truncate) {
{
fmt::ostream out = fmt::output_file("test-file");
out.print("0123456789");
}
{
fmt::ostream out = fmt::output_file("test-file");
out.print("foo");
}
file in("test-file", file::RDONLY);
EXPECT_EQ("foo", read(in, 4));
}
TEST(ostream_test, flush) {
auto out = fmt::output_file("test-file");
out.print("x");
out.flush();
auto in = fmt::file("test-file", file::RDONLY);
EXPECT_READ(in, "x");
}
TEST(file_test, default_ctor) {
file f;
EXPECT_EQ(-1, f.descriptor());
}
TEST(file_test, open_buffered_file_in_ctor) {
FILE* fp = safe_fopen("test-file", "w");
std::fputs(file_content, fp);
std::fclose(fp);
file f("test-file", file::RDONLY);
// Check if the file is open by reading one character from it.
char buffer;
bool isopen = FMT_POSIX(read(f.descriptor(), &buffer, 1)) == 1;
ASSERT_TRUE(isopen);
}
TEST(file_test, open_buffered_file_error) {
EXPECT_SYSTEM_ERROR(file("nonexistent", file::RDONLY), ENOENT,
"cannot open file nonexistent");
}
TEST(file_test, move_ctor) {
file f = open_file();
int fd = f.descriptor();
EXPECT_NE(-1, fd);
file f2(std::move(f));
EXPECT_EQ(fd, f2.descriptor());
EXPECT_EQ(-1, f.descriptor());
}
TEST(file_test, move_assignment) {
file f = open_file();
int fd = f.descriptor();
EXPECT_NE(-1, fd);
file f2;
f2 = std::move(f);
EXPECT_EQ(fd, f2.descriptor());
EXPECT_EQ(-1, f.descriptor());
}
TEST(file_test, move_assignment_closes_file) {
file f = open_file();
file f2 = open_file();
int old_fd = f2.descriptor();
f2 = std::move(f);
EXPECT_TRUE(isclosed(old_fd));
}
file open_buffered_file(int& fd) {
file f = open_file();
fd = f.descriptor();
return f;
}
TEST(file_test, move_from_temporary_in_ctor) {
int fd = 0xdead;
file f(open_buffered_file(fd));
EXPECT_EQ(fd, f.descriptor());
}
TEST(file_test, move_from_temporary_in_assignment) {
int fd = 0xdead;
file f;
f = open_buffered_file(fd);
EXPECT_EQ(fd, f.descriptor());
}
TEST(file_test, move_from_temporary_in_assignment_closes_file) {
int fd = 0xdead;
file f = open_file();
int old_fd = f.descriptor();
f = open_buffered_file(fd);
EXPECT_TRUE(isclosed(old_fd));
}
TEST(file_test, close_file_in_dtor) {
int fd = 0;
{
file f = open_file();
fd = f.descriptor();
}
EXPECT_TRUE(isclosed(fd));
}
TEST(file_test, close_error_in_dtor) {
std::unique_ptr<file> f(new file(open_file()));
EXPECT_WRITE(
stderr,
{
// The close function must be called inside EXPECT_WRITE,
// otherwise the system may recycle closed file descriptor when
// redirecting the output in EXPECT_STDERR and the second close
// will break output redirection.
FMT_POSIX(close(f->descriptor()));
SUPPRESS_ASSERT(f.reset(nullptr));
},
system_error_message(EBADF, "cannot close file") + "\n");
}
TEST(file_test, close) {
file f = open_file();
int fd = f.descriptor();
f.close();
EXPECT_EQ(-1, f.descriptor());
EXPECT_TRUE(isclosed(fd));
}
TEST(file_test, close_error) {
file f = open_file();
FMT_POSIX(close(f.descriptor()));
EXPECT_SYSTEM_ERROR_NOASSERT(f.close(), EBADF, "cannot close file");
EXPECT_EQ(-1, f.descriptor());
}
TEST(file_test, read) {
file f = open_file();
EXPECT_READ(f, file_content);
}
TEST(file_test, read_error) {
file f("test-file", file::WRONLY);
char buf;
// We intentionally read from a file opened in the write-only mode to
// cause error.
EXPECT_SYSTEM_ERROR(f.read(&buf, 1), EBADF, "cannot read from file");
}
TEST(file_test, write) {
file read_end, write_end;
file::pipe(read_end, write_end);
write(write_end, "test");
write_end.close();
EXPECT_READ(read_end, "test");
}
TEST(file_test, write_error) {
file f("test-file", file::RDONLY);
// We intentionally write to a file opened in the read-only mode to
// cause error.
EXPECT_SYSTEM_ERROR(f.write(" ", 1), EBADF, "cannot write to file");
}
TEST(file_test, dup) {
file f = open_file();
file copy = file::dup(f.descriptor());
EXPECT_NE(f.descriptor(), copy.descriptor());
EXPECT_EQ(file_content, read(copy, std::strlen(file_content)));
}
# ifndef __COVERITY__
TEST(file_test, dup_error) {
int value = -1;
EXPECT_SYSTEM_ERROR_NOASSERT(file::dup(value), EBADF,
"cannot duplicate file descriptor -1");
}
# endif
TEST(file_test, dup2) {
file f = open_file();
file copy = open_file();
f.dup2(copy.descriptor());
EXPECT_NE(f.descriptor(), copy.descriptor());
EXPECT_READ(copy, file_content);
}
TEST(file_test, dup2_error) {
file f = open_file();
EXPECT_SYSTEM_ERROR_NOASSERT(
f.dup2(-1), EBADF,
fmt::format("cannot duplicate file descriptor {} to -1", f.descriptor()));
}
TEST(file_test, dup2_noexcept) {
file f = open_file();
file copy = open_file();
std::error_code ec;
f.dup2(copy.descriptor(), ec);
EXPECT_EQ(ec.value(), 0);
EXPECT_NE(f.descriptor(), copy.descriptor());
EXPECT_READ(copy, file_content);
}
TEST(file_test, dup2_noexcept_error) {
file f = open_file();
std::error_code ec;
SUPPRESS_ASSERT(f.dup2(-1, ec));
EXPECT_EQ(EBADF, ec.value());
}
TEST(file_test, pipe) {
file read_end, write_end;
file::pipe(read_end, write_end);
EXPECT_NE(-1, read_end.descriptor());
EXPECT_NE(-1, write_end.descriptor());
write(write_end, "test");
EXPECT_READ(read_end, "test");
}
TEST(file_test, fdopen) {
file read_end, write_end;
file::pipe(read_end, write_end);
int read_fd = read_end.descriptor();
EXPECT_EQ(read_fd, FMT_POSIX(fileno(read_end.fdopen("r").get())));
}
# ifdef FMT_LOCALE
TEST(locale_test, strtod) {
fmt::locale loc;
const char *start = "4.2", *ptr = start;
EXPECT_EQ(4.2, loc.strtod(ptr));
EXPECT_EQ(start + 3, ptr);
}
# endif
#endif // FMT_USE_FCNTL
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