Unit testing

Unit tests use pytest`, in the ``tests subdirectory. The only flag that’s essentially required is --basetemp, since many queuing systems won’t work if you try to submit jobs from a temporary directory like /tmp, which pytest` uses by default, because those are not shared between the head node and compute nodes. Pass --basetemp a directory under your home directory instead. The --clean flag is recommended unless you are worried that something is so wrong that attempting to clean deleted jobs will delete the wrong thing. The EXPYRE_PYTEST_SYSTEMS env var is recommended unless you want all the remote tests to run on every remote system (useful to ensure that they are working, but overkill if you changed functionality that’s not computer or queuing system dependent). Example use: ` env EXPYRE_PYTEST_SYSTEMS=tin pytest --clean --basetemp $HOME/pytest `