with_routing

# File actionpack/lib/action_dispatch/testing/assertions/routing.rb, line 40
        def with_routing(&block)
          old_routes = initialize_lazy_routes(app.routes)
          old_routes_call_method = old_routes.method(:call)
          old_integration_session = integration_session
          create_routes(&block)
        ensure
          reset_routes(old_routes, old_routes_call_method, old_integration_session)
        end