A Ruby implementation of the FizzBuzz test using the Enumerator class

FizzBuzz = Enumerator.new do |yielder|
  count = 1
  loop do
    if count % 3 == 0
      if count % 5 == 0
        yielder.yield "FizzBuzz"
      else
        yielder.yield "Fizz"
      end
    elsif count % 5 == 0
      yielder.yield "Buzz"
    else 
      yielder.yield count
    end
    count += 1
  end
end

require_relative 'fizzbuzz'
 
describe FizzBuzz do
  before(:all) do
    @fizzbuzzes = FizzBuzz.first(100)
  end
 
  it "returns 'Fizz' for all multiples of 3" do
    @fizzbuzzes[3-1].should == 'Fizz'
  end
 
  it "returns 'Buzz' for all multiples of 5" do
    @fizzbuzzes[5-1].should == 'Buzz'
 
  end
 
  it "returns 'FizzBuzz' for all multiples of 3 and 5" do
    @fizzbuzzes[60 - 1].should == 'FizzBuzz'
 
  end
 
  it "returns the passed number if not a multiple of 3 or 5" do
    @fizzbuzzes[1 - 1].should == 1
  end
end