code: def test_agent(self):
      agent = TestAgent(self.alg)
      obs = np.random.random([3, 10]).astype("float32")
      output_np = agent.predict(obs)
      self.assertIsNotNone(output_np)
  
imports: import numpy
  import unittest
  from paddle import fluid
  from parl import layers
  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