We add $HOME to the environment variables we define for a test case
in order to redirect it from the user's actual home directory. This
is necessary because xcb-util-xrm will fall back to $HOME/.Xresources
when determining the DPI. If a user has this set to, e.g., 192 on their
machine, this would break tests.
Since tests shouldn't rely on the system they run in, we redirect the
home directory altogether to simulate a clean slate.
relates to #2465
instead of executing a new perl interpreter (via TAP::Parser)
each time we start a testfile, fork a TestWorker for each display.
Each worker preloads i3test via 'require', blocking waits on its ipc
to get a new filename, forks itself upon arrival and 'do'es this
testscript.
Michael Stapelberg