code: def test_bfgs_no_data(self):
      with pytest.raises(RuntimeError):
          VW(convert_to_vw=False, oaa=3, passes=30, bfgs=True).fit()
  
imports: from collections import namedtuple
  import os
  import numpy
  from packaging import version
  import pandas
  import pytest
  from scipy.sparse import csr_matrix
  from sklearn import datasets, __version__
  from sklearn.model_selection import KFold
  from sklearn.utils.estimator_checks import check_estimator
  from vowpalwabbit.sklearn import VW, VWClassifier, VWRegressor, tovw, VWMultiClassifier, VWRegressor
label_desc: Use image node_id 13 for calling the TestVW obj's underlying member method code with example usage: obj.test_bfgs_no_data() without return types