def METHOD_NAME(self):
    app = path_prefix.PathPrefixMiddleware(self._echo_app, "")
    server = werkzeug_test.Client(app, werkzeug.wrappers.Response)
    with self.subTest("at empty"):
        self._assert_ok(server.get(""), path="", script="")
    with self.subTest("at root"):
        self._assert_ok(server.get("/"), path="/", script="")
    with self.subTest("at subpath"):
        response = server.get("/foo/bar")
        self._assert_ok(server.get("/foo/bar"), path="/foo/bar", script="")