create_session

# File actionpack/lib/action_dispatch/testing/integration.rb, line 344
      def create_session(app)
        klass = APP_SESSIONS[app] ||= Class.new(Integration::Session) {
          # If the app is a Rails app, make url_helpers available on the session.
          # This makes app.url_for and app.foo_path available in the console.
          if app.respond_to?(:routes) && app.routes.is_a?(ActionDispatch::Routing::RouteSet)
            include app.routes.url_helpers
            include app.routes.mounted_helpers
          end
        }
        klass.new(app)
      end