code: def test_check_x_y_returns_pandas_from_pandas(df_vartypes):
      s = pd.Series([0, 1, 2, 3])
      x, y = check_X_y(df_vartypes, s)
      assert_frame_equal(df_vartypes, x)
      assert_series_equal(s, y)
  
imports: import numpy
  import pandas
  import pytest
  from pandas.testing import assert_frame_equal, assert_series_equal
  from scipy.sparse import csr_matrix
  from feature_engine.dataframe_checks import _check_contains_inf, _check_contains_na, _check_X_matches_training_df, check_X, check_X_y, check_y
label_desc: Use image node_id 11 for calling a global function with example usage: test_check_x_y_returns_pandas_from_pandas(df_vartypes) without return types