Forked from dbc-challenges/P5: OO Inheritance.rb
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December 20, 2015 03:49
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| class Vehicle | |
| def initialize(args) | |
| @status = :stopped | |
| @color = args[:color] | |
| @gas_capacity = 10 | |
| @gas = 5 | |
| end | |
| def drive | |
| unless needs_gas? | |
| @gas -= 1 | |
| @status = :driving | |
| else | |
| return "You're out of gas!" | |
| end | |
| end | |
| def brake | |
| @status = :stopped | |
| end | |
| def needs_gas? | |
| @gas == 0 ? true : false | |
| end | |
| def fill_tank | |
| @gas = @gas_capacity | |
| end | |
| end | |
| class Car < Vehicle | |
| def initialize(args) | |
| super | |
| @wheels = 4 | |
| end | |
| end | |
| class Bus < Vehicle | |
| attr_reader :passengers | |
| def initialize(args) | |
| super | |
| @wheels = 8 | |
| @num_seats = args[:num_seats] | |
| @fare = args[:fare] | |
| @passengers=[] | |
| @gas_capacity = 30 | |
| end | |
| def drive | |
| return self.brake if stop_requested? | |
| super | |
| end | |
| def admit_passenger(passenger,money) | |
| @passengers << passenger if money > @fare | |
| end | |
| def stop_requested? | |
| return [true,false].sample | |
| end | |
| end | |
| class Motorbike < Vehicle | |
| def initialize(args) | |
| super | |
| @wheels = 2 | |
| end | |
| def drive | |
| super | |
| @speed = :fast | |
| end | |
| def weave_through_traffic | |
| @status = :driving_like_a_crazy_person | |
| end | |
| end | |
| car_instance = Car.new color: "Red" | |
| bus_instance = Bus.new color: "White", num_seats: 20, fare: 3 | |
| bike_instance = Motorbike.new color: "Black" | |
| puts "Car tests:" | |
| p car_instance.drive == :driving | |
| p car_instance.brake == :stopped | |
| gas_status = car_instance.needs_gas? | |
| p gas_status == true || gas_status == false | |
| puts "Bus tests:" | |
| p bus_instance.passengers == [] | |
| bus_status = bus_instance.drive | |
| p bus_status == :driving || bus_status == :stopped | |
| p bus_instance.admit_passenger("rich", 5) == ["rich"] | |
| p bus_instance.passengers == ["rich"] | |
| p bus_instance.admit_passenger("poor", 2).nil? | |
| p bus_instance.brake == :stopped | |
| stop_status = bus_instance.stop_requested? | |
| p stop_status == true || stop_status == false | |
| gas_status = bus_instance.needs_gas? | |
| p gas_status == true || gas_status == false | |
| puts "Bike tests:" | |
| p bike_instance.drive == :fast | |
| p bike_instance.brake == :stopped | |
| gas_status = bike_instance.needs_gas? | |
| p gas_status == false || gas_status == true | |
| p bike_instance.weave_through_traffic == :driving_like_a_crazy_person |
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