emilford

RSpec.shared_examples_for "an interface" do |objects, class_methods: false|
  let(:class_methods) { class_methods }

  it "classes have compatible interfaces" do
    objects.each_cons(2) do |left, right|
      left_params = params_for(left, method(:normalize_params))
      right_params = params_for(right, method(:normalize_params))

      diff = (left_params - right_params) + (right_params - left_params)