code: def test_dict_defaults_ray_actor_options(self):
      # Dictionary fields should have empty dictionaries as defaults, not None
  
      ray_actor_options_schema = {}
      schema = RayActorOptionsSchema.parse_obj(ray_actor_options_schema)
      d = schema.dict()
      assert d["runtime_env"] == {}
      assert d["resources"] == {}
  
imports: import copy
  import json
  import logging
  import sys
  from typing import Dict, List, Optional, Union
  import pytest
  from ray import serve
  from ray._private.pydantic_compat import ValidationError
  from ray.serve.config import AutoscalingConfig
  from ray.serve.deployment import deployment_to_schema, schema_to_deployment
  from ray.serve.schema import DeploymentSchema, LoggingConfig, RayActorOptionsSchema, ServeApplicationSchema, ServeDeploySchema, ServeInstanceDetails
  from ray.serve.tests.common.remote_uris import TEST_DEPLOY_GROUP_PINNED_URI, TEST_MODULE_PINNED_URI
  from ray.util.accelerators.accelerators import NVIDIA_TESLA_P4, NVIDIA_TESLA_V100
label_desc: Use image node_id 7 for calling the TestRayActorOptionsSchema obj's underlying member method code with example usage: obj.test_dict_defaults_ray_actor_options() without return types