処理順序がだいじなコードに yield_self を適用する (Ruby 2.5)

scraper.rb

# Ref: https://github.com/gouf/scholar_ps/blob/7b4b4bbe79197cbb2683af9cae95ada7e5418c46/ScholarPs/scraper/scraper.rb#L14
def process!
  html =
    @watir.yield_self(&method(:login!))
          .yield_self(&method(:loan_id_confirm!))
          .yield_self(&method(:findout_loan_detail!))
          .yield_self(&:html)

  detail_page = Nokogiri::HTML(html)

  convert_to_hash_from_detail_page(detail_page)
end