调试黄瓜测试错误

Question

我的页面似乎正常工作，但是我的黄瓜测试显示错误。

HAML中页面的相关位：

= simple_form_for(@client, url: { action: "update_password" }, html: { method: :put }) do |f|
  STUFF
  = f.submit "Update password", id: "submit", :class => "btn btn-primary submit"

崩溃的行是“我提交表单”，即：

When /^I submit the form$/ do
  generic_form_page = GenericFormPage.new(Capybara.current_session)
  generic_form_page.submit

  if Capybara.current_session.mode == :poltergeist
    ajax_page = GenericAjaxPage.new Capybara.current_session
    ajax_page.wait_for_ajax_call_to_finish
  end
end

我得到的错误是：

And I submit the form    # features/step_definitions/shared/common_steps.rb:30
  Unable to find css ".simple_form input[type=submit]" (Capybara::ElementNotFound)
  ./features/pages/support/form_page_mixin.rb:3:in `submit'
  ./features/step_definitions/shared/common_steps.rb:32:in `/^I submit the form$/'
  features/admin/change_client_password.feature:22:in `And I submit the form'