rockpaper.rb

class RockPaperEnemy
  attr_accessor :chosen_one
  def initialize
    @choices = %w[rock paper scissors]
    @chosen_one = @choices[rand(0..2)]
    puts "You chose #{@chosen_one}"
  end

  def compare(other_choice)
    case other_choice
    when "rock"
      if @chosen_one == "paper"
        puts "You Lost, paper beats rock"
      elsif @chosen_one == "rock"
        puts "Tie! rock and rock"
      else
        puts "You win, rock beats scissors"
      end

    when "paper"
      if @chosen_one == "paper"
        puts "Tie! paper and paper"
      elsif @chosen_one == "rock"
        puts "You win, paper beats rock"
      else
        puts "You lose, scissors beats paper"
      end

    when "scissors"
      if @chosen_one == "paper"
        puts "You win, scissors beats paper"
      elsif @chosen_one == "rock"
        puts "You lose, rock beats scissors"
      else
        puts "Tie! scissors and scissors"
      end
    end
  end
end

class RockPaperSelf
  attr_accessor :chosen_one
  def initialize
    @choices = %w[rock paper scissors]
    @chosen_one = @choices[rand(0..2)]
    puts "They chose #{@chosen_one}"
  end

  def compare(other_choice)
    case other_choice
    when "rock"
      if @chosen_one == "paper"
        puts "You Lost, paper beats rock"
      elsif @chosen_one == "rock"
        puts "Tie! rock and rock"
      else
        puts "You win, rock beats scissors"
        end

    when "paper"
      if @chosen_one == "paper"
        puts "Tie! paper and paper"
      elsif @chosen_one == "rock"
        puts "You win, paper beats rock"
      else
        puts "You lose, scissors beats paper"
      end

    when "scissors"
      if @chosen_one == "paper"
        puts "You win, scissors beats paper"
      elsif @chosen_one == "rock"
        puts "You lose, rock beats scissors"
      else
        puts "Tie! scissors and scissors"
      end
    end
  end
end

their_choice = RockPaperEnemy.new
your_choice = RockPaperSelf.new

your_choice.compare(their_choice.chosen_one)