use a real path instead of a fake path to fix test error in IPCProvider

[voith]

What was wrong?

The test was using a fake path. Ever since pathlib was introduced in IPCProvider, fake paths no longer work. Here is a failing build.

How was it fixed?

Used a tempfile.gettempdir() to make sure that the path exists. Also had to use a Path('path').resolve to get the test passing on OSx. On OSX, /var is a symlink to /private/var.
tempfile.gettempdir() returns /var but Path('path').resolve returns /private/var

Cute Animal Picture

[voith]

I just got a little lazy and used a directory path instead of file path.
something like tmp_path = Path(gettempdir()).resolve() / 'jsonrpc.json'.
Did not do this as it would need to actually create a file, else the test would complain that path doesn't exist. Let me know if thats needed.

[carver]

Yup, looks fine to me 👍

[voith]

Thanks @carver