code: def test_roles(self):
      roles = {"role1"}
      user = AnonymousUser()
      user.roles = roles
      assert user.roles == roles
  
imports: from __future__ import annotations
  from airflow.providers.fab.auth_manager.models.anonymous_user import AnonymousUser
label_desc: Use image node_id 1 for calling the TestAnonymousUser obj's underlying member method code with example usage: obj.test_roles() without return types