Shadowing in ruby

gistfile1.rb

class User
  def self.ceo
    new("Fred")
  end

  def self.all_managers
    [User.new("Wilma")]
  end

  def initialize name
    @name = name
  end

  def manager
    manager = User.ceo
    User.all_managers.each {|manager| return manager if self.reports_to?(manager) }
    return manager
  end

  def reports_to? manager
    false
  end
end

describe User do
  describe "#manager" do
    context "when there are no managers" do
      it "should return the CEO" do
        ceo = stub User
        User.stub :ceo => ceo, :all_managers => []
        User.new("Andrew").manager.should == ceo
      end
    end

    context "when there is a manager to whom the user reports" do
      it "should return that manager" do
        ceo = stub User
        wilma = stub User
        User.stub :ceo => ceo, :all_managers => [wilma]
        user = User.new("Andrew")
        user.stub :reports_to => true
        user.manager.should == wilma
      end
    end
  end
end