Extract method to share path expansion logic.

Then just yield the location for the place where we need some extra processing.

actionpack/lib/action_dispatch/testing/integration.rb

@@ -327,19 +327,17 @@ def process(method, path, params: nil, headers: nil, env: nil, xhr: false, as: n
           request_encoder = RequestEncoder.encoder(as)
 
           if path =~ %r{://}
-            location = URI.parse(path)
+            path = build_expanded_path(path, request_encoder) do |location|
               https! URI::HTTPS === location if location.scheme
+
               if url_host = location.host
                 default = Rack::Request::DEFAULT_PORTS[location.scheme]
                 url_host += ":#{location.port}" if default != location.port
                 host! url_host
               end
-            path = request_encoder.append_format_to location.path
-            path = location.query ? "#{path}?#{location.query}" : path
+            end
           elsif as
-            location = URI.parse(path)
-            path = request_encoder.append_format_to location.path
-            path = location.query ? "#{path}?#{location.query}" : path
+            path = build_expanded_path(path, request_encoder)
           end
 
           hostname, port = host.split(':')
@@ -398,6 +396,13 @@ def build_full_uri(path, env)
           "#{env['rack.url_scheme']}://#{env['SERVER_NAME']}:#{env['SERVER_PORT']}#{path}"
         end
 
+        def build_expanded_path(path, request_encoder)
+          location = URI.parse(path)
+          yield location if block_given?
+          path = request_encoder.append_format_to location.path
+          location.query ? "#{path}?#{location.query}" : path
+        end
+
         class RequestEncoder # :nodoc:
           @encoders = {}