RSpec, Capyabara, Poltergiest, Angular, jQuery wait_for_ajax

wait_for_ajax.rb

# spec/support/wait_for_ajax.rb
# # Angular, Rails, Capybara, wait for ajax
# Useage:
#   click_link("Send an ajax request")
#   wait_for_ajax
#   expect(page).to have_content("expected ajax response message")
module WaitForAjax
  def wait_for_ajax(max_wait_time = 30)
    Timeout.timeout(max_wait_time) do
      while pending_ajax_requests?
        sleep 0.1
      end
    end
  end

  # using with poltergiest
  def pending_ajax_requests?
    page.driver.network_traffic.collect(&:response_parts).any?(&:empty?)
  end

  # Angular
  # def pending_ajax_requests?
  #   page.evaluate_script("angular.element(document.body).injector().get('$http').pendingrequests.length") > 0
  # end
  
  # def pending_ajax_requests? 
  #   active == page.evaluate_script('jQuery.active')
  # end
end

RSpec.configure do |config|
  config.include WaitForAjax
end