# File lib/vcr/cassette/http_interaction_list.rb, line 60
      def assert_no_unused_interactions!
        return unless has_unused_interactions?
        logger = Logger.new(nil)

        descriptions = @interactions.map do |i|
          "  - #{logger.request_summary(i.request, @request_matchers)} => #{logger.response_summary(i.response)}"
        end.join("\n")

        raise Errors::UnusedHTTPInteractionError, "There are unused HTTP interactions left in the cassette:\n#{descriptions}"
      end