gistfile1.txt

  def wait_until_visible(locator, seconds = 10)
    raise ArgumentError if locator.blank?

    begin
      Timeout::timeout(seconds) do
        until page.has_css?(locator) && find(locator).visible?
          sleep 0.25
        end
      end
    rescue Timeout::Error => e
      fail "'#{locator}' did not appear within #{seconds} seconds"
    end
  end