code: def test_unknown_fa_method_error():
      # Test raise error if an unkonwn FA method is specified in fa.method
      mod = Factor(X.iloc[:, 1:-1], 2, method="ab")
      assert_raises(ValueError, mod.fit)
  
file_path: statsmodels/statsmodels/multivariate/tests/test_factor.py
imports: import warnings
  from statsmodels.compat.pandas import PD_LT_1_4
  import os
  import numpy
  import pandas
  from statsmodels.multivariate.factor import Factor
  from numpy.testing import assert_equal, assert_array_almost_equal, assert_, assert_raises, assert_array_equal, assert_array_less, assert_allclose
  import pytest
label_desc: Use image node_id 3 for calling a global function with example usage: test_unknown_fa_method_error() without return types