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// This source code is released into the public domain.
#include <fcntl.h>
#include <unistd.h>
#include <catch2/catch_test_macros.hpp>
import nihil.std;
import nihil.error;
import nihil.posix;
using namespace std::literals;
namespace {
// Test if an fd is open.
auto fd_is_open(int fd) -> bool {
auto const ret = ::fcntl(fd, F_GETFL);
return ret == 0;
}
TEST_CASE("fd: construct empty", "[fd]") {
auto const fd = nihil::fd();
REQUIRE(!fd);
REQUIRE_THROWS_AS(fd.get(), std::logic_error);
}
TEST_CASE("fd: construct from fd", "[fd]") {
auto file = ::open("/dev/null", O_RDONLY);
REQUIRE(file > 0);
{
auto fd = nihil::fd(file);
REQUIRE(fd_is_open(fd.get()));
}
REQUIRE(!fd_is_open(file));
}
TEST_CASE("fd: close", "[fd]") {
auto file = ::open("/dev/null", O_RDONLY);
REQUIRE(file > 0);
auto fd = nihil::fd(file);
REQUIRE(fd);
auto const ret = fd.close();
REQUIRE(ret);
REQUIRE(!fd_is_open(file));
}
TEST_CASE("fd: move construct", "[fd]") {
auto file = ::open("/dev/null", O_RDONLY);
REQUIRE(file > 0);
auto fd1 = nihil::fd(file);
REQUIRE(fd_is_open(fd1.get()));
auto fd2(std::move(fd1));
REQUIRE(!fd1); //NOLINT
REQUIRE(fd2);
REQUIRE(fd2.get() == file);
REQUIRE(fd_is_open(file));
}
TEST_CASE("fd: move assign", "[fd]") {
auto file = ::open("/dev/null", O_RDONLY);
REQUIRE(file > 0);
auto fd1 = nihil::fd(file);
REQUIRE(fd_is_open(fd1.get()));
auto fd2 = nihil::fd();
REQUIRE(!fd2);
fd2 = std::move(fd1);
REQUIRE(!fd1); //NOLINT
REQUIRE(fd2);
REQUIRE(fd2.get() == file);
REQUIRE(fd_is_open(file));
}
TEST_CASE("fd: release", "[fd]") {
auto file = ::open("/dev/null", O_RDONLY);
REQUIRE(file > 0);
auto fd = nihil::fd(file);
auto fdesc = std::move(fd).release();
REQUIRE(!fd); //NOLINT
REQUIRE(fdesc == file);
}
TEST_CASE("fd: dup", "[fd]") {
auto file = ::open("/dev/null", O_RDONLY);
REQUIRE(file > 0);
auto fd = nihil::fd(file);
REQUIRE(fd);
auto fd2 = dup(fd);
REQUIRE(fd2);
REQUIRE(fd.get() != fd2->get());
}
TEST_CASE("fd: dup2", "[fd]") {
auto constexpr test_fd = 666;
auto file = ::open("/dev/null", O_RDONLY);
REQUIRE(file > 0);
REQUIRE(!fd_is_open(test_fd));
auto fd = nihil::fd(file);
auto fd2 = dup(fd, test_fd);
REQUIRE(fd);
REQUIRE(fd2);
REQUIRE(fd2->get() == test_fd);
}
TEST_CASE("fd: flags", "[fd]") {
auto file = ::open("/dev/null", O_RDONLY);
REQUIRE(file > 0);
auto fd = nihil::fd(file);
{
auto const ret = replaceflags(fd, nihil::fd_none);
REQUIRE(ret);
REQUIRE(getflags(fd) == nihil::fd_none);
}
{
auto const ret = setflags(fd, nihil::fd_nonblock);
REQUIRE(ret == nihil::fd_nonblock);
REQUIRE(getflags(fd) == nihil::fd_nonblock);
}
{
auto const ret = setflags(fd, nihil::fd_sync);
REQUIRE(ret == (nihil::fd_nonblock | nihil::fd_sync));
REQUIRE(getflags(fd) == (nihil::fd_nonblock | nihil::fd_sync));
}
{
auto const ret = clearflags(fd, nihil::fd_nonblock);
REQUIRE(ret == nihil::fd_sync);
REQUIRE(getflags(fd) == nihil::fd_sync);
}
}
TEST_CASE("fd: fdflags", "[fd]") {
auto file = ::open("/dev/null", O_RDONLY);
REQUIRE(file > 0);
auto fd = nihil::fd(file);
{
auto const ret = replacefdflags(fd, nihil::fd_fd_none);
REQUIRE(ret);
REQUIRE(getfdflags(fd) == nihil::fd_fd_none);
}
{
auto const ret = setfdflags(fd, nihil::fd_fd_cloexec);
REQUIRE(ret == nihil::fd_fd_cloexec);
REQUIRE(getfdflags(fd) == nihil::fd_fd_cloexec);
}
{
auto const ret = clearfdflags(fd, nihil::fd_fd_cloexec);
REQUIRE(ret == nihil::fd_fd_none);
REQUIRE(getfdflags(fd) == nihil::fd_fd_none);
}
}
TEST_CASE("fd: pipe, read, write", "[fd]") {
auto fds = nihil::pipe();
REQUIRE(fds);
/*
* Note: traditionally, the first fd is the reading side, and the second fd
* is the writing side. Some platforms (e.g., macOS) still behave this way.
*/
auto [fd1, fd2] = std::move(*fds);
auto constexpr test_string = "test string"sv;
auto ret = write(fd2, test_string);
REQUIRE(ret);
REQUIRE(*ret == test_string.size());
auto readbuf = std::array<char, test_string.size() * 2>{};
auto read_buf = read(fd1, readbuf);
REQUIRE(read_buf);
REQUIRE(std::string_view(*read_buf) == test_string);
}
} // anonymous namespace
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