Bubble Sorting in Ruby

bubble_sort.rb

module Enumerable
  def bubble_sortit

    reached_end = true
    (1..self.length-1).each do |e|
      if self[e] < self[e-1]
        self[e-1], self[e] = self[e], self[e-1]
        reached_end = false
      end
    end

    bubble_sortit unless reached_end

    self
  end
end

describe "BubbleSort" do
  it "swaps two elements" do
    [3, 2, 5].bubble_sortit.should eq [2, 3, 5]
  end
  it "swaps three elements" do
    [3, 2, 5, 4].bubble_sortit.should eq [2, 3, 4, 5]
  end
  it "swaps four elements" do
    [3, 2, 5, 4, 5].bubble_sortit.should eq [2, 3, 4, 5, 5]
  end
  it "needs more swapping" do
    [6, 5, 4].bubble_sortit.should eq [4, 5, 6]
  end
  it "does not change good order" do
    [2, 3, 5].bubble_sortit.should eq [2, 3, 5]
  end
  it "sorts random elements" do
    [3, 11, 54, 34, 28].bubble_sortit.should eq [3, 11, 28, 34, 54]
  end
end