Initialize the temporary directory in a "session_args" fixture that is session
scoped. Move the Klippy process to a session scope, restarting the process
only when necessary. This combination speeds up tests as it reduces disk
I/O and the overhead of starting the Klippy process for each test.
Signed-off-by: Eric Callahan <arksine.code@gmail.com>
55baad1ad0