code: def test_raises_non_fitted_error(df_datetime):
      # trying to transform before fitting
      with pytest.raises(NotFittedError):
          DatetimeFeatures().transform(df_datetime)
  
imports: import numpy
  import pandas
  import pytest
  from sklearn.exceptions import NotFittedError
  from sklearn.pipeline import Pipeline
  from feature_engine.datetime import DatetimeFeatures
  from feature_engine.datetime._datetime_constants import FEATURES_DEFAULT, FEATURES_SUFFIXES, FEATURES_SUPPORTED
label_desc: Use image node_id 12 for calling a global function with example usage: test_raises_non_fitted_error(df_datetime) without return types