Add unittest

Add unittest

[   76s] + ./nix
[   76s]
[   76s] running 66 tests
[   76s] test features::os::test_parsing_kernel_version ... ok
[   76s] test ifaddrs::tests::test_getifaddrs ... ok
[   76s] test ifaddrs::tests::test_getifaddrs_netmask_correct ... ok
[   76s] test sys::aio::t::casting ... ok
[   76s] test sys::select::tests::fdset_clear ... ok
[   76s] test sys::select::tests::fdset_fds ... ok
[   76s] test sys::select::tests::fdset_highest ... ok
[   76s] test sys::resource::test::test_self_cpu_time ... ok
[   76s] test sys::select::tests::fdset_insert ... ok
[   76s] test sys::select::tests::fdset_remove ... ok
[   76s] test sys::select::tests::test_select ... ok
[   76s] test sys::select::tests::test_select_nfds ... ok
[   76s] test sys::signal::tests::test_clear ... ok
[   76s] test sys::select::tests::test_select_nfds2 ... ok
[   76s] test sys::signal::tests::test_contains ... ok
[   76s] test sys::signal::tests::test_extend ... ok
[   76s] test sys::signal::tests::test_from_and_into_iterator ... ok
[   76s] test sys::signal::tests::test_from_sigset_t_unchecked ... ok
[   76s] test sys::signal::tests::test_from_str_invalid_value ... ok
[   76s] test sys::signal::tests::test_from_str_round_trips ... ok
[   76s] test sys::signal::tests::test_sigaction ... ok
[   76s] test sys::signalfd::tests::create_signalfd ... ok
[   76s] test sys::signal::tests::test_sigwait ... ok
[   76s] test sys::signalfd::tests::create_signalfd_with_opts ... ok
[   76s] test sys::signal::tests::test_thread_signal_swap ... ok
[   76s] test sys::signal::tests::test_thread_signal_set_mask ... ok
[   76s] test sys::signal::tests::test_thread_signal_block ... ok
[   76s] test sys::signalfd::tests::read_empty_signalfd ... ok
[   76s] test sys::signal::tests::test_thread_signal_unblock ... ok
[   76s] test sys::socket::addr::tests::link::linux_loopback ... ok
[   76s] test sys::socket::addr::tests::link::size ... ok
[   76s] test sys::socket::addr::tests::sockaddr_in6::size ... ok
[   76s] test sys::socket::addr::tests::sockaddr_in6::display ... ok
[   76s] test sys::socket::addr::tests::sockaddr_in6::to_and_from ... ok
[   76s] test sys::socket::addr::tests::sockaddr_in::display ... ok
[   76s] test sys::socket::addr::tests::sockaddr_in::size ... ok
[   76s] test sys::socket::addr::tests::sockaddr_storage::from_sockaddr_un_abstract_named ... ok
[   76s] test sys::socket::addr::tests::sockaddr_storage::from_sockaddr_un_abstract_unnamed ... ok
[   76s] test sys::socket::addr::tests::sockaddr_storage::from_sockaddr_un_named ... ok
[   76s] test sys::socket::addr::tests::types::test_ipv4addr_to_libc ... ok
[   76s] test sys::socket::addr::tests::unixaddr::abstract_sun_path ... ok
[   76s] test sys::socket::addr::tests::types::test_ipv6addr_to_libc ... ok
[   76s] test sys::socket::addr::tests::unixaddr::size ... ok
[   76s] test sys::socket::sockopt::test::can_get_listen_on_tcp_socket ... ok
[   76s] test sys::socket::sockopt::test::can_get_peercred_on_unix_socket ... ok
[   76s] test sys::socket::sockopt::test::is_socket_type_dgram ... ok
[   76s] test sys::socket::sockopt::test::is_socket_type_unix ... ok
[   76s] test sys::socket::test::test_recvmm2 ... FAILED
[   76s] test sys::socket::tests::can_use_cmsg_space ... ok
[   76s] test sys::statfs::test::fstatfs_call_strict ... ignored
[   76s] test sys::statfs::test::fstatfs_call ... ok
[   76s] test sys::statfs::test::statfs_call_strict ... ignored
[   76s] test sys::statvfs::test::fstatvfs_call ... ok
[   76s] test sys::statfs::test::statfs_call ... ok
[   76s] test sys::statvfs::test::statvfs_call ... ok
[   76s] test sys::termios::test::try_from ... ok
[   76s] test sys::time::test::test_timespec ... ok
[   76s] test sys::time::test::test_timespec_fmt ... ok
[   76s] test sys::time::test::test_timespec_neg ... ok
[   76s] test sys::time::test::test_timespec_from ... ok
[   76s] test sys::time::test::test_timeval ... ok
[   76s] test sys::time::test::test_timespec_ord ... ok
[   76s] test sys::time::test::test_timeval_fmt ... ok
[   76s] test sys::time::test::test_timeval_neg ... ok
[   76s] test sys::time::test::test_timeval_ord ... ok
[   76s] test sys::utsname::test::test_uname_linux ... ok
[   76s]
[   76s] failures:
[   76s]
[   76s] ---- sys::socket::test::test_recvmm2 stdout ----
[   76s] Error: ENOPROTOOPT
[   76s]
[   76s]
[   76s] failures:
[   76s]     sys::socket::test::test_recvmm2
[   76s]
[   76s] test result: FAILED. 63 passed; 1 failed; 2 ignored; 0 measured; 0 filtered out; finished in 0.08s