duplicated (2).rb

#---
# Excerpted from "Metaprogramming Ruby 2",
# published by The Pragmatic Bookshelf.
# Copyrights apply to this code. It may not be used to create training material, 
# courses, books, articles, and the like. Contact us if you are in doubt.
# We make no guarantees that this code is fit for any purpose. 
# Visit http://www.pragmaticprogrammer.com/titles/ppmetr2 for more book information.
#---
# The boring, duplication-ridden version of Computer

class Computer
  def initialize(computer_id, data_source)
    @id = computer_id
    @data_source = data_source
  end
  
  def mouse
    info = @data_source.get_mouse_info(@id)
    price = @data_source.get_mouse_price(@id)
    result = "Mouse: #{info} ($#{price})"
    return "* #{result}" if price >= 100
    result
  end
  
  def cpu
    info = @data_source.get_cpu_info(@id)
    price = @data_source.get_cpu_price(@id)
    result = "Cpu: #{info} ($#{price})"
    return "* #{result}" if price >= 100
    result
  end
  
  def keyboard
    info = @data_source.get_keyboard_info(@id)
    price = @data_source.get_keyboard_price(@id)
    result = "Keyboard: #{info} ($#{price})"
    return "* #{result}" if price >= 100
    result
  end
  
  # ...
end

require_relative 'unit_test'