lsp_2.rb

class Laboratory
  attr_accessor :scientists

  def initialize(scientists, experiments)
    @scientists = scientists
    @experiments = experiments
  end

  def run_all_experiments
    @scientists.each do |scientist|
      @experiments.each do |experiment|
        scientist.run_experiment(experiment)
      end
    end
  end
end

class Experiment
  attr_accessor :title

  def initialize(title)
    @title = title
  end
end

class Scientist
  attr_accessor :name

  def initialize(name)
    @name = name
  end

  def run_experiment(experiment)
    puts "#{name} is now running the #{experiment.title} experiment."
  end
end

class MadScientist < Scientist
  def run_experiment(experiment)
    if sabotage?
      puts "#{name} is now sabotaging the #{experiment.title} experiment!"
    else
      puts "#{name} is now running the #{experiment.title} experiment."
    end
  end

  private

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

chemistry_experiment = Experiment.new("chemistry")
physics_experiment = Experiment.new("physics")
biology_experiment = Experiment.new("biology")
experiments = [chemistry_experiment, physics_experiment, biology_experiment]

marie_curie = Scientist.new("Marie Curie")
niels_bohr = Scientist.new("Niels Bohr")
hubert_farnsworth = MadScientist.new("Hubert Farnsworth")
scientists = [marie_curie, niels_bohr, hubert_farnsworth]

lab = Laboratory.new(scientists, experiments)
lab.run_all_experiments