started tdd-ing schulze voting method... didn't get far, but had fun, stopped during refactoring so it's all broken

gistfile1.rb

require 'rspec'

describe "Schulze" do
  before :each do
    @ballots = [['q','f','b'],['f','b','q'],['q','f','b']]
    @ballots2 = [['f','q','b'],['f','b','q'],['q','f','b']]
    @schulze = Schulze.new @ballots
    @schulze_twin = Schulze.new @ballots2
  end

  it 'sits in his basement, and looks at ballots' do
    @schulze.should be_an_instance_of Schulze
  end

  it 'makes up an empty table of pairwise preferences from the first ballot' do
    @schulze.pairwise.values.each {|value| value.should eq 0}
    @schulze.pairwise.keys.each {|key| key.should be_an_instance_of Array}
  end

  it 'looks at each ballot and increments each pairwise preference' do
    @schulze.evaluate_yer_ballots
    @schulze_twin.evaluate_yer_ballots
    @schulze.pairwise.first.strength.should eq 2
    @schulze_twin.pairwise.first.strength.should eq 1
  end

  it '(he) compares each pairwise preference against opposite of that pair, thus coming up with DIRECT PATHS!!!'
end

class Schulze
  attr_reader :pairwise
  def initialize(ballots)
    @ballots = ballots
    @pairwise = prep_pairwise
  end

  def prep_pairwise
    @ballots.first.map do |option1|
      @ballots.first.map do |option2|
        Path.new({:from => option1, :to => option2, :strength => 0}) if option1 != option2
      end
    end
  end

  def evaluate_yer_ballots
    @ballots.each do |ballot|
      @pairwise.each do |pair|
        @pairwise[pair[0]]+=1 if (ballot.index(pair[0][0]) < ballot.index(pair[0][1]))
      end
    end
  end
end

class Path
  def initialize(opts = {})
    @from     = opts.fetch[:from]
    @to       = opts.fetch[:to]
    @strength = opts.fetch[:strength]
  end
end