tests
Classes 
JUnit_Clock
JUnit_ClockSpecification
JUnit_DirectionRequestButtonsOnFloors
JUnit_EmergencyController
JUnit_FloorButtonsInElevator
Validation_DirectionRequestButtonsOnFloors
Validation_Elevator_ImprovedStupid
Validation_Elevator_Stupid
Validation_ElevatorEmergency
Validation_FloorButtonsInElevator