module ActionDispatch::Integration::RequestHelpers

def follow_redirect!(headers: {}, **args)

The HTTP_REFERER header will be set to the previous url.

underlying request.
will be performed. Any arguments are passed to the
the same HTTP verb will be used when redirecting, otherwise a GET request
performed on the location header. If the redirection is a 307 or 308 redirect,
redirect, an exception will be raised. Otherwise, the redirect is
Follow a single redirect response. If the last response was not a 
def follow_redirect!(headers: {}, **args)
  raise "not a redirect! #{status} #{status_message}" unless redirect?
  method =
    if [307, 308].include?(response.status)
      request.method.downcase
    else
      :get
    end
  if [ :HTTP_REFERER, "HTTP_REFERER" ].none? { |key| headers.key? key }
    headers["HTTP_REFERER"] = request.url
  end
  public_send(method, response.location, headers: headers, **args)
  status
end