At the moment PytestTestEngine runs command py.test --junit-xml=<path to tmp file>. Beside changing the class itself, I found no way how to configure this. We'd like to be able to set that arc unit runs our unit and functional tests (e.g with heavy I/O) and py.test from command line runs only unit tests. So during development we do quick manual check from command line and later we run full tests using arc diff.
The solution using py.test and tox.ini is somehow hacky and it would be nice to have a way how to set how the py.test is run just like in the case of linting. Or is this already present in arcanist and I missed something?