code: def test_observation_spec(self):
      self.assertEqual(
          self._env.observation_spec(), ({"mock": [10, 1]},)
      )
  
imports: from absl.testing import absltest
  import mock
  import numpy
  from pysc2.env import enums
  from pysc2.env import environment
  from pysc2.env import mock_sc2_env
  from pysc2.env import sc2_env
  from pysc2.lib import features
  from s2clientprotocol import common_pb2
  from s2clientprotocol import raw_pb2
  from s2clientprotocol import sc2api_pb2
label_desc: Use image node_id 2 for calling the TestTestEnvironment obj's underlying member method code with example usage: obj.test_observation_spec() without return types