code: def test_grayscale_observation_space(self):
      assert self.env_g.observation_space.shape == (
          self.env.observation_space.shape[:-1]
      )
  
file_path: garage/tests/garage/envs/wrappers/test_grayscale_env.py
imports: import gym.spaces
  import numpy
  import pytest
  from garage.envs.wrappers import Grayscale
  from tests.fixtures.envs.dummy import DummyDiscretePixelEnv
label_desc: Use image node_id 5 for calling the TestGrayscale obj's underlying member method code with example usage: obj.test_grayscale_observation_space() without return types