code: def test_unclear_methods(self):
      # Both _est_lambda and untransform have a method argument that should
      # be tested.
      assert_raises(
          ValueError, self.bc._est_lambda, self.x, (-1, 2), "test"
      )
      assert_raises(
          ValueError, self.bc.untransform_boxcox, self.x, 1, "test"
      )
  
file_path: statsmodels/statsmodels/base/tests/test_transform.py
imports: import numpy
  from numpy.testing import assert_almost_equal, assert_equal, assert_raises
  from statsmodels.base.transform import BoxCox
  from statsmodels.datasets import macrodata
label_desc: Use image node_id 4 for calling the TestTransform obj's underlying member method code with example usage: obj.test_unclear_methods() without return types