code: def test_TransformObservationFeatures(self) -> None:
      obs_ft2 = deepcopy(self.observation_features)
      obs_ft2 = self.t.transform_observation_features(obs_ft2)
      self.assertEqual(obs_ft2, self.transformed_features)
  
file_path: Ax/ax/modelbridge/transforms/tests/test_search_space_to_float_transform.py
imports: from copy import deepcopy
  from ax.core.observation import ObservationFeatures
  from ax.core.parameter import ChoiceParameter, ParameterType, RangeParameter
  from ax.core.search_space import SearchSpace
  from ax.modelbridge.transforms.search_space_to_float import SearchSpaceToFloat
  from ax.utils.common.testutils import TestCase
label_desc: Use image node_id 3 for calling the SearchSpaceToFloatTest obj's underlying member method code with example usage: obj.test_TransformObservationFeatures() without return types