FAQ on the FediTest testing framework

https://feditest.org/faq/feditest/

• FediTest emits many "null" values in the generated JSON files. Why is that?
• Is FediTest just for testing ActivityPub?
• Is it complicated to implement a NodeDriver?
• Tests can either be defined as functions or as classes with "steps". What's that for?
• What's the role of UBOS in Feditest?
• Why didn't you build on PyTest or some other unit testing framework?