code: def test_HandleUnknownValue_HaveUnknown_ExpectEncodedWithZero(self):
      X = ["a", "a", "b", "b"]
      y = [1, 0, 0, 0]
      test = ["a", "c"]
      enc = encoders.WOEEncoder(handle_unknown="value")
  
      enc.fit(X, y)
      result = enc.transform(test)
  
      expected = pd.Series([0.5108256237659906, 0], name=0)
      pd.testing.assert_series_equal(expected, result[0])
  
file_path: category_encoders/tests/test_woe.py
imports: import pandas
  from unittest import TestCase
  import tests.helpers
  import numpy
  import category_encoders
label_desc: Use image node_id 5 for calling the TestWeightOfEvidenceEncoder obj's underlying member method code with example usage: obj.test_HandleUnknownValue_HaveUnknown_ExpectEncodedWithZero() without return types