code: def test_state_buffer_connector(self):
      ctx = ConnectorContext(
          action_space=gym.spaces.Box(low=-1.0, high=1.0, shape=(3,)),
      )
      c = StateBufferConnector(ctx)
  
      # Reset without any buffered data should do nothing.
      c.reset(env_id=0)
  
      d = AgentConnectorDataType(
          0,
          1,
          {
              SampleBatch.NEXT_OBS: {
                  "sensor1": [[1, 1], [2, 2]],
                  "sensor2": 8.8,
              },
          },
      )
  
      with_buffered = c([d])
      self.assertEqual(len(with_buffered), 1)
      self.assertTrue(
          (
              with_buffered[0].data[SampleBatch.ACTIONS] == [0, 0, 0]
          ).all()
      )
  
      c.on_policy_output(
          ActionConnectorDataType(0, 1, {}, ([1, 2, 3], [], {}))
      )
  
      with_buffered = c([d])
      self.assertEqual(len(with_buffered), 1)
      self.assertEqual(
          with_buffered[0].data[SampleBatch.ACTIONS], [1, 2, 3]
      )
  
imports: import gymnasium
  from gymnasium.spaces import Box
  import numpy
  import tree
  import unittest
  from ray.rllib.algorithms.ppo.ppo import PPOConfig
  from ray.rllib.connectors.agent.clip_reward import ClipRewardAgentConnector
  from ray.rllib.connectors.agent.lambdas import FlattenDataAgentConnector
  from ray.rllib.connectors.agent.obs_preproc import ObsPreprocessorConnector
  from ray.rllib.connectors.agent.pipeline import AgentConnectorPipeline
  from ray.rllib.connectors.agent.state_buffer import StateBufferConnector
  from ray.rllib.connectors.agent.view_requirement import ViewRequirementAgentConnector
  from ray.rllib.connectors.connector import ConnectorContext
  from ray.rllib.connectors.registry import get_connector
  from ray.rllib.policy.view_requirement import ViewRequirement
  from ray.rllib.policy.sample_batch import SampleBatch
  from ray.rllib.utils.test_utils import check
  from ray.rllib.utils.typing import ActionConnectorDataType, AgentConnectorDataType, AgentConnectorsOutput
  from ray.rllib.connectors.agent.mean_std_filter import MeanStdObservationFilterAgentConnector
label_desc: Use image node_id 5 for calling the TestAgentConnector obj's underlying member method code with example usage: obj.test_state_buffer_connector() without return types