So far I’ve found FactorioTest https://github.com/GlassBricks/FactorioTest/wiki/Getting-Started and Faketorio https://github.com/JonasJurczok/faketorio so I’m going to look at these.

I’m also considering writing a basic wrapper that will allow me to create test scenarios that build on one another ...

What are folks doing for automated integration/system testing? I have some basic assertions for my helper functions but I'm getting super tired of manually reloading scripts and clicking around in the GUI to validate changes.