instance method process

# File actionpack/lib/action_controller/test_case.rb, line 469
      def process(action, *args)
        check_required_ivars

        if kwarg_request?(args)
          parameters, session, body, flash, http_method, format, xhr, as = args[0].values_at(:params, :session, :body, :flash, :method, :format, :xhr, :as)
        else
          http_method, parameters, session, flash = args
          format = nil

          if parameters.is_a?(String) && http_method != 'HEAD'
            body = parameters
            parameters = nil
          end

          if parameters || session || flash
            non_kwarg_request_warning
          end
        end

        if body
          @request.set_header 'RAW_POST_DATA', body
        end

        if http_method
          http_method = http_method.to_s.upcase
        else
          http_method = "GET"
        end

        parameters ||= {}

        @html_document = nil

        self.cookies.update @request.cookies
        self.cookies.update_cookies_from_jar
        @request.set_header 'HTTP_COOKIE', cookies.to_header
        @request.delete_header 'action_dispatch.cookies'

        @request          = TestRequest.new scrub_env!(@request.env), @request.session
        @response         = build_response @response_klass
        @response.request = @request
        @controller.recycle!

        @request.set_header 'REQUEST_METHOD', http_method

        if as
          @request.content_type = Mime[as].to_s
          format ||= as
        end

        if format
          parameters[:format] = format
        end

        parameters = parameters.symbolize_keys

        generated_extras = @routes.generate_extras(parameters.merge(controller: controller_class_name, action: action.to_s))
        generated_path = generated_path(generated_extras)
        query_string_keys = query_parameter_names(generated_extras)

        @request.assign_parameters(@routes, controller_class_name, action.to_s, parameters, generated_path, query_string_keys)

        @request.session.update(session) if session
        @request.flash.update(flash || {})

        if xhr
          @request.set_header 'HTTP_X_REQUESTED_WITH', 'XMLHttpRequest'
          @request.fetch_header('HTTP_ACCEPT') do |k|
            @request.set_header k, [Mime[:js], Mime[:html], Mime[:xml], 'text/xml', '*/*'].join(', ')
          end
        end

        @request.fetch_header("SCRIPT_NAME") do |k|
          @request.set_header k, @controller.config.relative_url_root
        end

        begin
          @controller.recycle!
          @controller.dispatch(action, @request, @response)
        ensure
          @request = @controller.request
          @response = @controller.response

          if @request.have_cookie_jar?
            unless @request.cookie_jar.committed?
              @request.cookie_jar.write(@response)
              self.cookies.update(@request.cookie_jar.instance_variable_get(:@cookies))
            end
          end
          @response.prepare!

          if flash_value = @request.flash.to_session_value
            @request.session['flash'] = flash_value
          else
            @request.session.delete('flash')
          end

          if xhr
            @request.delete_header 'HTTP_X_REQUESTED_WITH'
            @request.delete_header 'HTTP_ACCEPT'
          end
          @request.query_string = ''

          @response.sent!
        end

        @response
      end