docstr: Test if a flattened image obs is passed to get_action
  then it is unflattened.
docstr_tok: ["Test","if","a","flattened","image","obs","is","passed","to","get_action","then","it","is","unflattened","."]
code: def test_obs_unflattened(self):
      """Test if a flattened image obs is passed to get_action
      then it is unflattened.
      """
      obs = self.env.observation_space.sample()
      action, _ = self.policy.get_action(
          self.env.observation_space.flatten(obs)
      )
      self.env.step(action)
  
imports: import pickle
  import pytest
  import tensorflow
  from garage.envs import GymEnv
  from garage.envs.wrappers import AtariEnv
  from garage.tf.policies import DiscreteQFArgmaxPolicy
  from garage.tf.q_functions import DiscreteCNNQFunction
  from tests.fixtures import TfGraphTestCase
  from tests.fixtures.envs.dummy import DummyDictEnv, DummyDiscreteEnv, DummyDiscretePixelEnvBaselines
  from tests.fixtures.q_functions import SimpleQFunction
label_desc: Use image node_id 2 for calling the TestQfDerivedPolicyImageObs obj's underlying member method code with example usage: obj.test_obs_unflattened() without return types