P5: OO Inheritance.rb

class Vehicle
   attr_accessor :status, :magical_creature
   attr_reader :color, :wheels

  def initialize(args)
   @color = args[:color]
   @status = 'stopped'
   @wheels = args[:wheels]
   @magical_creature = false
  end

  def brake
    @status = 'stopped' 
  end

  def drive
    @status = 'driving'
  end

  def needs_gas?
    [true,true,false].sample
  end

end


class Car < Vehicle

  def initialize(args)
    super
    @wheels = 4
  end

end

### Car tests ### 
sexy_car = Car.new({:color => 'dingy tan'})
p sexy_car.drive  == 'driving'
p sexy_car.needs_gas?
p sexy_car.color  == 'dingy tan'
p sexy_car.brake  == 'stopped'


class Bus < Vehicle
  attr_reader :wheels, :color, :passengers, :num_seats, :fare

  def initialize(args)
   super
    @wheels = args[:wheels]
    @num_seats = args[:num_seats]
    @fare = args[:fare]
    @passengers=[]
    @magical_creature = true
  end

  def drive
    stop_requested? == true ? self.brake : @status = "Racing through the Japanese countryside"
  end

  def admit_passenger(passenger,money)
    @passengers << passenger if money >= @fare
  end

  def stop_requested?
    [true,false].sample
  end

  def needs_gas?
    [true,true,true,false].sample
  end

  def accept_sad_girls(passenger,fare)
    fare == 'corn' ? @passengers << passenger : "MEOWRRRR"
  end

end

### Bus tests ###
cat_bus = Bus.new({:color => 'Furry', :wheels => 'legs', :num_seats => 6, :fare => 2.00})
cat_bus.admit_passenger('small totoro', 2.00)
p cat_bus.passengers == ['small totoro']
cat_bus.admit_passenger('small girl', 0)
cat_bus.accept_sad_girls('small girl', 'corn')
p cat_bus.passengers == ['small totoro', 'small girl']
p cat_bus.drive
p cat_bus.drive
p cat_bus.drive
p cat_bus.drive
p cat_bus.wheels == 'legs'
p cat_bus.magical_creature == true

 
class Motorbike < Vehicle
  attr_accessor :speed, :status

  def initialize(args)
    super
    @wheels = 2
  end
  
  def drive
    super
    @speed = 'fast'
  end
  
  def needs_gas?
    [true,false,false,false].sample
  end 

  def weave_through_traffic
    @status = 'driving like a crazy person'
  end
end

### Motorbike tests ###
my_cool_bike = Motorbike.new({:color => 'black'})
p my_cool_bike.drive  == 'fast'
p my_cool_bike.brake  == 'stopped'
p my_cool_bike.weave_through_traffic  == 'driving like a crazy person'