class_docstr: Tests for `EmptyPathRedirectMiddleware`.
docstr: Strips a `/foo` prefix if it exists; no-op otherwise.
code: def _lax_strip_foo_middleware(self, app):
      """Strips a `/foo` prefix if it exists; no-op otherwise."""
  
      def wrapper(environ, start_response):
          path = environ.get("PATH_INFO", "")
          if path.startswith("/foo"):
              environ["PATH_INFO"] = path[len("/foo") :]
              environ["SCRIPT_NAME"] = "/foo"
          return app(environ, start_response)
  
      return wrapper
  
file_path: tensorboard/tensorboard/backend/empty_path_redirect_test.py
imports: import werkzeug
  from werkzeug import test
  from tensorboard import test
  from tensorboard.backend import empty_path_redirect
label_desc: Use image node_id 2 for calling the EmptyPathRedirectMiddlewareTest obj's underlying member method code with example usage: obj._lax_strip_foo_middleware(app) and returns: wrapper, app