My friend could not resist and soon provided me with a following excerpt from the definition of three classical unities of drama:
Aristotelian unities or three unities are rules for drama:
- The unity of action: a play should have one main action that it follows, with no or few subplots.
- The unity of place: a play should cover a single physical space and should not attempt to compress geography, nor should the stage represent more than one place.
- The unity of time: the action in a play should take place over no more than 24 hours.
So, there it is. Your guidelines for writing good unit tests. :)