public void to_string_method_should_return_Empty_for_names_and_an_empty_string_for_type_when_crewMembers_are_null()
{
var smartFortwo = new SmartFortwo();
var result = smartFortwo.ToString();
Assert.Equal("Smart Fortwo: | Driver: Empty | Passenger: Empty", result);
}
public void to_string_method_should_show_return_smart_fortwo_information()
{
var smartFortwo = new SmartFortwo();
smartFortwo.EnterBoth(new Pilot("driverName"), new Officer("passengerName"));
var result = smartFortwo.ToString();
Assert.Equal("Smart Fortwo: | Driver: Pilot driverName | Passenger: Officer passengerName", result);
}