gistfile1.rb

module Cacher
  def self.extended(base)
    base.class_eval do
      before do
        if subject.respond_to?(:caches_action) && cache_path = example.metadata[:cache]
          subject.caches_action cache_path
        end
      end
    end
  end
end

RSpec.configure do |c|
  c.extend Cacher, :type => :controller
end