P5: OO Inheritance.rb

class Vehicle
  attr_reader :color, :status

  def initialize(args)
    @wheels = self.wheels
    @seats = self.seats
    @status = self.status
    @color = args.fetch(:color) {self.color}
    @speed = self.speed
  end

  def seats
    raise "No default number of seats for Vehicle class"
  end

  def wheels
     4
  end

  def color
    return @color if @color != nil
    raise "No default color for Vehicle class"
  end

  def status
    return @status if @status != nil
    :stopped
  end

  def speed
    return @speed if @speed != nil
    raise "No default speed for vehicle class"
  end

  def drive
     @status = :driving
  end

  def brake
     @status = :stopped    
  end

end


class Car < Vehicle

  def seats
    5
  end

  def color
    "grey"
  end

  def speed
    :moderate
  end

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

car = Car.new({})
puts car.color == "grey"
puts car.status == :stopped
puts car.wheels == 4
puts car.seats == 5
car.drive
puts car.status == :driving

class Bus < Vehicle
   attr_reader :passengers

  def initialize(args)
    super(args)
    @passengers = args.fetch(:passengers) {[]}
    @fare = args.fetch(:fare) {raise "No fare amount provided"}
  end

  def speed
    :slow
  end

  def wheels
    6
  end

  def color
    return @color if @color != nil
    "Red and white"
  end

  def seats
    52
  end

  def drive
    return self.brake if stop_requested?
    @status = :driving
  end
  
  def admit_passenger(passenger,money)
    @passengers << passenger if money > @fare
  end
  
  def stop_requested?
    return [true,false].sample
  end
  
  def needs_gas?
    return [true,true,true,false].sample
  end

end

muni = Bus.new({:color => "Green", :fare => 2.00})

puts muni.wheels == 6
puts muni.seats == 52
puts muni.color == "Green"
puts muni.status == :stopped
muni.drive
# p muni.admit_passenger("Tom Jones", 2.50)

class Motorbike < Vehicle

  def speed
    :fast
  end

  def wheels
    2  
  end

  def seats
    1
  end

  def drive
    @status = :driving
    @speed = :fast
  end
  
  def needs_gas?
    return [true,false,false,false].sample
  end 
  
  def weave_through_traffic
    @status = :driving_like_a_crazy_person
  end

end


puts "Motorcycle: "
ducati = Motorbike.new({:color => "fire-red"})

puts ducati.wheels == 2
puts ducati.seats == 1
puts ducati.color == "fire-red"
puts ducati.status == :stopped
ducati.drive
puts ducati.status == :driving
ducati.weave_through_traffic
puts ducati.status == :driving_like_a_crazy_person



# require 'minitest/spec'
# require 'minitest/autorun'

# describe Car do
#    before :each do
#       @car = Car.new({:color => 'red'})
#    end

#    describe "#new" do
#       it "takes one parameter and returns a Car object" do
#          @car.must_be_instance_of Car
#       end
#    end

#    describe "#drive" do
#       it "returns :driving" do
#          @car.drive.must_equal :driving
#       end
#    end

#    describe "#break" do
#       it "returns :stopped" do
#          @car.brake.must_equal :stopped
#       end
#    end

#    describe "#needs_gas" do
#       it "returns true or false" do
#          # @car.needs_gas.must_equal true || false
#       end
#    end

# end