code: def test_dqfd(self):
      # Create a fake environment to test with.
      # TODO(b/152596848): Allow DQN to deal with integer observations.
      environment = fakes.DiscreteEnvironment(
          num_actions=5,
          num_observations=10,
          obs_dtype=np.float32,
          episode_length=10,
      )
      spec = specs.make_environment_spec(environment)
  
      # Build demonstrations.
      dummy_action = np.zeros((), dtype=np.int32)
      recorder = bsuite_demonstrations.DemonstrationRecorder()
      timestep = environment.reset()
      while timestep.step_type is not dm_env.StepType.LAST:
          recorder.step(timestep, dummy_action)
          timestep = environment.step(dummy_action)
      recorder.step(timestep, dummy_action)
      recorder.record_episode()
  
      # Construct the agent.
      agent = dqfd.DQfD(
          environment_spec=spec,
          network=_make_network(spec.actions),
          demonstration_dataset=recorder.make_tf_dataset(),
          demonstration_ratio=0.5,
          batch_size=10,
          samples_per_insert=2,
          min_replay_size=10,
      )
  
      # Try running the environment loop. We have no assertions here because all
      # we care about is that the agent runs without raising any errors.
      loop = acme.EnvironmentLoop(environment, agent)
      loop.run(num_episodes=10)
  
file_path: acme/acme/agents/tf/dqfd/agent_test.py
imports: import acme
  from acme import specs
  from acme.agents.tf.dqfd import agent
  from acme.agents.tf.dqfd import bsuite_demonstrations
  from acme.testing import fakes
  import dm_env
  import numpy
  import sonnet
  from absl.testing import absltest
label_desc: Use image node_id 1 for calling the DQfDTest obj's underlying member method code with example usage: obj.test_dqfd() without return types