The library test previously used the real ~/.cache, while the
library test and the shell-script tests would use the real ~/.config
to look up the XDG user-dirs.dirs. Other home-directory-related code
might have used the real $HOME.
As a general rule, build-time tests should not affect the real home
directory. Debian autobuilders run as a user whose home directory
does not exist, in order to catch packages whose build process could
affect or be affected by the contents of the home directory. This
caused testlibrary to fail when it tried to create that nonexistent
directory, which I think happened while trying to create ~/.cache.
Signed-off-by: Simon McVittie <smcv@debian.org>
5de225e615
