To make sure if cache method in FcPath is functioning as it supposed to do.

[khsrali]

Previously, when FcPath was part of aiida-firecrest @chrisjsewell could control explicitly if cache should be enable or disable based on specific purpose, in this way: self._cwd.joinpath(remotesource).enable_cache()

But when the class eth-cscs/pyfirecrest#43 got merged into pyfirecrest, they took enable_cache() away, in such a way that when you make a joinpath() the new path is just copying the flag from the original path. So here if self._cwd has cache=True then joinpath() returns an FCPath with cache=True, likewise for cache=False.

For now we have self._cwd with cache=True always. The thing that I'm not entirely sure if that is going to mess things up when files on remote is changed...
In my manual tests, I haven't seen any wrong return when files on remote has changed and yet cache=True.

But still this has to be investigated thoroughly.