class Capybara::RackTest::Form

def params(button)
  form_element_types = %i[input select textarea button]
  form_elements_xpath = XPath.generate do |xp|
    xpath = xp.descendant(*form_element_types).where(!xp.attr(:form))
    xpath += xp.anywhere(*form_element_types).where(xp.attr(:form) == native[:id]) if native[:id]
    xpath.where(!xp.attr(:disabled))
  end.to_s
  form_elements = native.xpath(form_elements_xpath).reject { |el| submitter?(el) && (el != button.native) }
  form_params = form_elements.each_with_object({}.compare_by_identity) do |field, params|
    case field.name
    when 'input', 'button' then add_input_param(field, params)
    when 'select' then add_select_param(field, params)
    when 'textarea' then add_textarea_param(field, params)
    end
  end
  form_params.each_with_object(make_params) do |(name, value), params|
    merge_param!(params, name, value)
  end.to_params_hash
  # form_elements.each_with_object(make_params) do |field, params|
  #   case field.name
  #   when 'input', 'button' then add_input_param(field, params)
  #   when 'select' then add_select_param(field, params)
  #   when 'textarea' then add_textarea_param(field, params)
  #   end
  # end.to_params_hash
end