fmt/test/posix-test.cc
2019-05-30 07:42:36 -07:00

385 lines
9.6 KiB
C++

// Formatting library for C++ - tests of the C++ interface to POSIX functions
//
// Copyright (c) 2012 - present, Victor Zverovich
// All rights reserved.
//
// For the license information refer to format.h.
#include <cstdlib> // std::exit
#include <cstring>
#include <memory>
#include "fmt/posix.h"
#include "gtest-extra.h"
#include "util.h"
#ifdef fileno
# undef fileno
#endif
using fmt::buffered_file;
using fmt::error_code;
using fmt::file;
// Checks if the file is open by reading one character from it.
static bool isopen(int fd) {
char buffer;
return FMT_POSIX(read(fd, &buffer, 1)) == 1;
}
static bool isclosed(int fd) {
char buffer;
std::streamsize result = 0;
SUPPRESS_ASSERT(result = FMT_POSIX(read(fd, &buffer, 1)));
return result == -1 && errno == EBADF;
}
// Opens a file for reading.
static 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.
static void write(file& f, fmt::string_view s) {
std::size_t num_chars_left = s.size();
const char* ptr = s.data();
do {
std::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(BufferedFileTest, DefaultCtor) {
buffered_file f;
EXPECT_TRUE(f.get() == nullptr);
}
TEST(BufferedFileTest, MoveCtor) {
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(BufferedFileTest, MoveAssignment) {
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(BufferedFileTest, MoveAssignmentClosesFile) {
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(BufferedFileTest, MoveFromTemporaryInCtor) {
FILE* fp = nullptr;
buffered_file f(open_buffered_file(&fp));
EXPECT_EQ(fp, f.get());
}
TEST(BufferedFileTest, MoveFromTemporaryInAssignment) {
FILE* fp = nullptr;
buffered_file f;
f = open_buffered_file(&fp);
EXPECT_EQ(fp, f.get());
}
TEST(BufferedFileTest, MoveFromTemporaryInAssignmentClosesFile) {
buffered_file f = open_buffered_file();
int old_fd = f.fileno();
f = open_buffered_file();
EXPECT_TRUE(isclosed(old_fd));
}
TEST(BufferedFileTest, CloseFileInDtor) {
int fd = 0;
{
buffered_file f = open_buffered_file();
fd = f.fileno();
}
EXPECT_TRUE(isclosed(fd));
}
TEST(BufferedFileTest, CloseErrorInDtor) {
std::unique_ptr<buffered_file> f(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));
},
format_system_error(EBADF, "cannot close file") + "\n");
}
TEST(BufferedFileTest, Close) {
buffered_file f = open_buffered_file();
int fd = f.fileno();
f.close();
EXPECT_TRUE(f.get() == nullptr);
EXPECT_TRUE(isclosed(fd));
}
TEST(BufferedFileTest, CloseError) {
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(BufferedFileTest, Fileno) {
buffered_file f;
#ifndef __COVERITY__
// fileno on a null FILE pointer either crashes or returns an error.
// Disable Coverity because this is intentional.
EXPECT_DEATH_IF_SUPPORTED(
{
try {
f.fileno();
} catch (const fmt::system_error&) {
std::exit(1);
}
},
"");
#endif
f = open_buffered_file();
EXPECT_TRUE(f.fileno() != -1);
file copy = file::dup(f.fileno());
EXPECT_READ(copy, FILE_CONTENT);
}
TEST(FileTest, DefaultCtor) {
file f;
EXPECT_EQ(-1, f.descriptor());
}
TEST(FileTest, OpenBufferedFileInCtor) {
FILE* fp = safe_fopen("test-file", "w");
std::fputs(FILE_CONTENT, fp);
std::fclose(fp);
file f("test-file", file::RDONLY);
ASSERT_TRUE(isopen(f.descriptor()));
}
TEST(FileTest, OpenBufferedFileError) {
EXPECT_SYSTEM_ERROR(file("nonexistent", file::RDONLY), ENOENT,
"cannot open file nonexistent");
}
TEST(FileTest, MoveCtor) {
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(FileTest, MoveAssignment) {
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(FileTest, MoveAssignmentClosesFile) {
file f = open_file();
file f2 = open_file();
int old_fd = f2.descriptor();
f2 = std::move(f);
EXPECT_TRUE(isclosed(old_fd));
}
static file OpenBufferedFile(int& fd) {
file f = open_file();
fd = f.descriptor();
return f;
}
TEST(FileTest, MoveFromTemporaryInCtor) {
int fd = 0xdead;
file f(OpenBufferedFile(fd));
EXPECT_EQ(fd, f.descriptor());
}
TEST(FileTest, MoveFromTemporaryInAssignment) {
int fd = 0xdead;
file f;
f = OpenBufferedFile(fd);
EXPECT_EQ(fd, f.descriptor());
}
TEST(FileTest, MoveFromTemporaryInAssignmentClosesFile) {
int fd = 0xdead;
file f = open_file();
int old_fd = f.descriptor();
f = OpenBufferedFile(fd);
EXPECT_TRUE(isclosed(old_fd));
}
TEST(FileTest, CloseFileInDtor) {
int fd = 0;
{
file f = open_file();
fd = f.descriptor();
}
EXPECT_TRUE(isclosed(fd));
}
TEST(FileTest, CloseErrorInDtor) {
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));
},
format_system_error(EBADF, "cannot close file") + "\n");
}
TEST(FileTest, Close) {
file f = open_file();
int fd = f.descriptor();
f.close();
EXPECT_EQ(-1, f.descriptor());
EXPECT_TRUE(isclosed(fd));
}
TEST(FileTest, CloseError) {
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(FileTest, Read) {
file f = open_file();
EXPECT_READ(f, FILE_CONTENT);
}
TEST(FileTest, ReadError) {
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(FileTest, 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(FileTest, WriteError) {
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(FileTest, 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(FileTest, DupError) {
int value = -1;
EXPECT_SYSTEM_ERROR_NOASSERT(file::dup(value), EBADF,
"cannot duplicate file descriptor -1");
}
#endif
TEST(FileTest, 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(FileTest, Dup2Error) {
file f = open_file();
EXPECT_SYSTEM_ERROR_NOASSERT(
f.dup2(-1), EBADF,
fmt::format("cannot duplicate file descriptor {} to -1", f.descriptor()));
}
TEST(FileTest, Dup2NoExcept) {
file f = open_file();
file copy = open_file();
error_code ec;
f.dup2(copy.descriptor(), ec);
EXPECT_EQ(ec.get(), 0);
EXPECT_NE(f.descriptor(), copy.descriptor());
EXPECT_READ(copy, FILE_CONTENT);
}
TEST(FileTest, Dup2NoExceptError) {
file f = open_file();
error_code ec;
SUPPRESS_ASSERT(f.dup2(-1, ec));
EXPECT_EQ(EBADF, ec.get());
}
TEST(FileTest, 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(FileTest, 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())));
}
TEST(FileTest, FdopenError) {
file f;
EXPECT_SYSTEM_ERROR_NOASSERT(f.fdopen("r"), EBADF,
"cannot associate stream with file descriptor");
}
#ifdef FMT_LOCALE
TEST(LocaleTest, Strtod) {
fmt::Locale locale;
const char *start = "4.2", *ptr = start;
EXPECT_EQ(4.2, locale.strtod(ptr));
EXPECT_EQ(start + 3, ptr);
}
#endif