instance method build_request_uri

# File actionpack/lib/action_controller/test_case.rb, line 716
      def build_request_uri(action, parameters)
        unless @request.env["PATH_INFO"]
          options = @controller.respond_to?(:url_options) ? @controller.__send__(:url_options).merge(parameters) : parameters
          options.update(
            :action => action,
            :relative_url_root => nil,
            :_recall => @request.path_parameters)

          if route_name = options.delete(:use_route)
            ActiveSupport::Deprecation.warn <<-MSG.squish
              Passing the `use_route` option in functional tests are deprecated.
              Support for this option in the `process` method (and the related
              `get`, `head`, `post`, `patch`, `put` and `delete` helpers) will
              be removed in the next version without replacement.

              Functional tests are essentially unit tests for controllers and
              they should not require knowledge to how the application's routes
              are configured. Instead, you should explicitly pass the appropiate
              params to the `process` method.

              Previously the engines guide also contained an incorrect example
              that recommended using this option to test an engine's controllers
              within the dummy application. That recommendation was incorrect
              and has since been corrected. Instead, you should override the
              `@routes` variable in the test case with `Foo::Engine.routes`. See
              the updated engines guide for details.
            MSG
          end

          url, query_string = @routes.path_for(options, route_name).split("?", 2)

          @request.env["SCRIPT_NAME"] = @controller.config.relative_url_root
          @request.env["PATH_INFO"] = url
          @request.env["QUERY_STRING"] = query_string || ""
        end
      end