code: def test_agent(self):
      agent = TestAgent(self.alg)
      obs = np.random.random([10, 4]).astype("float32")
      output_np = agent.predict(obs)
      self.assertIsNotNone(output_np)
  
      params = agent.get_weights()
      hd1 = np.dot(obs, params["fc1.weight"]) + params["fc1.bias"]
      hd2 = np.dot(hd1, params["fc2.weight"]) + params["fc2.bias"]
      out = np.dot(hd2, params["fc3.weight"]) + params["fc3.bias"]
      self.assertLess((out.sum() - output_np.sum()), 1e-5)
  
imports: import numpy
  import unittest
  import paddle
  import paddle.nn
  import parl
  import os
label_desc: Use image node_id 2 for calling the AgentBaseTest obj's underlying member method code with example usage: obj.test_agent() without return types