I used to test this stuff.
Systems test 5,832,355/10,200,122:
"Ok, this one validates a cooling fan will stop trying to cool the equipment if the equipment is in flames, and it preserves this state after loosing sensor data, and through a control fail-over, when the port wing has fallen off."
"Check. Next."
It is immensely satisfying to read a detailed story about a plane getting swiss-cheesed, all these systems working in concert, and the crew effectively managing the situation safely.