## permute.rb
class Permuter
  def shuffle(word)
    word
  end
end

## permute_rspec.rb
require 'permute'

describe Permuter do
  before do
    @permuter = Permuter.new
  end

  it "should instantiate" do
    @permuter.class.should equal(Permuter)
  end

  it "should generate a shuffled string" do
    @permuter.shuffle("cat").should_not equal("cat")
  end
end