code: def test_evaluate_categorical(self):
      feature = Feature("x1")
      actual = feature.evaluate({"x1": "foo"})
      expected = "foo"
      self.assertEqual(actual, expected)
  
      actual = feature.evaluate({"x1": True})
      expected = True
      self.assertEqual(actual, expected)
  
file_path: AIX360/tests/rule_induction/trxf/core/test_feature.py
imports: import tokenize
  from unittest import TestCase
  from aix360.algorithms.rule_induction.trxf.core.feature import Feature, _shunting_yard
label_desc: Use image node_id 5 for calling the TestFeature obj's underlying member method code with example usage: obj.test_evaluate_categorical() without return types