FizzBuzz Kata 4th iteration

fizz_buzz_4_spec.rb

class Game
  def self.play
    (1..100).map { |n| Kid.answer_to(n) }
  end

  class Kid
    def self.answer_to(number)
      if (number % 15).zero?
        "FizzBuzz"
      elsif (number % 3).zero?
        "Fizz"
      elsif (number % 5).zero?
        "Buzz"
      else
        number
      end
    end
  end
end

describe Game do
  it "asks the kids for 100 times" do
    Game.play.length.should be == 100
  end
end

describe Game::Kid do
  it "replies with number for any number" do
    Game::Kid.answer_to(1).should be == 1
  end

  it "replies with 'Fizz' for numbers divisable by 3" do
    Game::Kid.answer_to(3).should == "Fizz"
  end

  it "replies with 'Buzz' for numbers divisable by 5" do
    Game::Kid.answer_to(5).should be == "Buzz"
  end

  it "replies with 'FizzBuzz' for numbers divisable by 3,  5" do
    Game::Kid.answer_to(15).should be == "FizzBuzz"
  end
end

Obvious stuff of course.. Though is it really obvious? If you start to solve the same problem over and over again you notice that the outcome is slightly different each time.