code: def test_errors(self):
      with pytest.raises(ValueError):
          webdoc(array, True)
      with pytest.raises(ValueError):
          webdoc(1, False)
  
file_path: statsmodels/statsmodels/tools/tests/test_web.py
imports: import pytest
  from numpy import array
  from statsmodels.regression.linear_model import OLS
  from statsmodels.tools.web import _generate_url, webdoc
label_desc: Use image node_id 4 for calling the TestWeb obj's underlying member method code with example usage: obj.test_errors() without return types