def test_diesel_car_fuel_cylinders(self):
diesel_car = DieselCar()
self.assertEqual(1, diesel_car.getNumberCylinders())
diesel_car.setNumberCylinders(4)
self.assertEqual(4, diesel_car.getNumberCylinders())
carP = PetrolCar()
carP.setMake("Volkswagen Beetle")
carP.setColour("Blue")
carP.setNumberCylinders(4)
carP.setMileage(1000)
print " Make of Petrol car is :" + carP.getMake()
print " Colour of the car is :" + carP.getColour()
print " Number of cylinders :" + str(carP.getNumberCylinders())
print " Mileage of Petrol car is :" + str(carP.getMileage())
print "_________________________________________"
#Diesel car details.
carD = DieselCar()
carD.setMake("Audi Q7")
carD.setColour("Silver")
carD.setNumberCylinders(4)
carD.setMileage(500)
print " Make of Diesel car is :" + carD.getMake()
print " Colour of the car is :" + carD.getColour()
print " Number of cylinders :" + str(carD.getNumberCylinders())
print " Milegae of Diesel car is :" + str(carD.getMileage())
print "_________________________________________"
#Electric car details.
carE = ElectricCar()
carE.setMake("Nissan Leaf")
carE.setColour("Green")
carE.setNumberFuelCells(4)
carE.setMileage(450)
print " Make of Electric car is :" + carE.getMake()
print " Colour of the car is :" + carE.getColour()