code: def test_dataset_as_X_y(self, as_frame, fetch_function):
      if (
          as_frame is False
          and fetch_function is fetch_diabetes_hospital
      ):
          msg = "fetch_diabetes_hospital will be skipped until dataset is fixed."
          pytest.skip(msg)
      X, y = fetch_function(as_frame=as_frame, return_X_y=True)
      assert X is not None
      assert isinstance(X, pd.DataFrame if as_frame else np.ndarray)
      assert y is not None
      assert isinstance(y, pd.Series if as_frame else np.ndarray)
  
imports: import pandas
  import numpy
  import pytest
  from fairlearn.datasets import fetch_adult, fetch_bank_marketing, fetch_boston, fetch_credit_card, fetch_diabetes_hospital
label_desc: Use image node_id 2 for calling the TestFairlearnDataset obj's underlying member method code with example usage: obj.test_dataset_as_X_y(as_frame, fetch_function) without return types