Use it to consistently place all temporary files created by tests in a overridable folder specific to the user, that is easy to cleanup later.
NOTE: os.temp_dir() on macos returns `/tmp`, and using `/tmp/v` is a problem when multiple unix users are trying to access/create/write to it.
net provides networking functions. It is mostly a wrapper to BSD sockets,
so you can listen on a port, connect to remote TCP/UDP services, and
communicate with them.