code: def test_integration(self):
      env = catch.Catch()
      action_spec = env.action_spec()
      num_actions = action_spec.num_values
      obs_spec = env.observation_spec()
      agent = agent_lib.Agent(
          num_actions=num_actions,
          obs_spec=obs_spec,
          net_factory=haiku_nets.CatchNet,
      )
      unroll_length = 20
      learner = learner_lib.Learner(
          agent=agent,
          rng_key=jax.random.PRNGKey(42),
          opt=optax.sgd(1e-2),
          batch_size=1,
          discount_factor=0.99,
          frames_per_iter=unroll_length,
      )
      actor = actor_lib.Actor(
          agent=agent,
          env=env,
          learner=learner,
          unroll_length=unroll_length,
      )
      frame_count, params = actor.pull_params()
      actor.unroll_and_push(frame_count=frame_count, params=params)
      learner.run(max_iterations=1)
  
file_path: dm-haiku/examples/impala/learner_test.py
imports: from absl.testing import absltest
  from bsuite.environments import catch
  from examples.impala import actor
  from examples.impala import agent
  from examples.impala import haiku_nets
  from examples.impala import learner
  import jax
  import optax
label_desc: Use image node_id 1 for calling the LearnerTest obj's underlying member method code with example usage: obj.test_integration() without return types