example specs for converting roman numerals

converting_roman_numerals_spec.rb

describe "Converting integers to roman numerals" do

  describe "with simple conversions" do
    Then { 1.should be_converted_to 'I' }
    Then { 5.should be_converted_to 'V' }
    Then { 10.should be_converted_to 'X' }
  end

  describe "with additive conversions" do
    Then { 3.should be_converted_to 'III' }
    Then { 2.should be_converted_to 'II' }
    Then { 20.should be_converted_to 'XX' }
  end

  describe "with combined conversions" do
    Then { 6.should be_converted_to 'VI' }
    Then { 11.should be_converted_to 'XI' }
    Then { 12.should be_converted_to 'XII' } 
  end
end