old_contents: import unittest
  from nala.features import eval_binary_feature
  from nala.structures.data import FeatureDictionary
  import re
  
  
  class TestBinaryFeatureWrapper(unittest.TestCase):
      def test_regex_evaluator(self):
          regex = re.compile('^[A-Z]+$')
  
          feature_dict = FeatureDictionary()
          eval_binary_feature(feature_dict, 'name', regex.search, 'ABC')
  
          self.assertEqual(feature_dict.get('name[0]'), 1)
          self.assertEqual(len(feature_dict), 1)
  
          feature_dict = FeatureDictionary()
          eval_binary_feature(feature_dict, 'name', regex.search, 'abc')
  
          self.assertEqual(feature_dict.get('name[0]'), None)
          self.assertEqual(len(feature_dict), 0)
  
      def test_labmda_evaluator(self):
          feature_dict = FeatureDictionary()
          eval_binary_feature(feature_dict, 'name', lambda x: x == 'ABC', 'ABC')
          self.assertEqual(feature_dict.get('name[0]'), 1)
          self.assertEqual(len(feature_dict), 1)
  
          feature_dict = FeatureDictionary()
          eval_binary_feature(feature_dict, 'name', lambda x: x == 'ABC', 'abc')
          self.assertEqual(feature_dict.get('name[0]'), None)
          self.assertEqual(len(feature_dict), 0)
  
          feature_dict = FeatureDictionary()
          eval_binary_feature(feature_dict, 'name', lambda x, y: x == y, 'xx', 'xx')
          self.assertEqual(feature_dict.get('name[0]'), 1)
          self.assertEqual(len(feature_dict), 1)
  
          feature_dict = FeatureDictionary()
          eval_binary_feature(feature_dict, 'name', lambda x, y: x == y, 'xx', 'yy')
          self.assertEqual(feature_dict.get('name[0]'), None)
          self.assertEqual(len(feature_dict), 0)
  
  if __name__ == '__main__':
      unittest.main()
new_contents: import unittest
  from nala.features import eval_binary_feature
  from nala.structures.data import FeatureDictionary
  import re
  
  
  class TestBinaryFeatureWrapper(unittest.TestCase):
      def test_regex_evaluator(self):
          regex = re.compile('^[A-Z]+$')
  
          feature_dict = FeatureDictionary()
          eval_binary_feature(feature_dict, 'name', regex.search, 'ABC')
  
          self.assertEqual(feature_dict.get('name[0]'), 1)
          self.assertEqual(len(feature_dict), 1)
  
          feature_dict = FeatureDictionary()
          eval_binary_feature(feature_dict, 'name', regex.search, 'abc')
  
          self.assertEqual(feature_dict.get('name[0]'), None)
          self.assertEqual(len(feature_dict), 0)
  
      def test_lambda_evaluator(self):
          feature_dict = FeatureDictionary()
          eval_binary_feature(feature_dict, 'name', lambda x: x == 'ABC', 'ABC')
          self.assertEqual(feature_dict.get('name[0]'), 1)
          self.assertEqual(len(feature_dict), 1)
  
          feature_dict = FeatureDictionary()
          eval_binary_feature(feature_dict, 'name', lambda x: x == 'ABC', 'abc')
          self.assertEqual(feature_dict.get('name[0]'), None)
          self.assertEqual(len(feature_dict), 0)
  
          feature_dict = FeatureDictionary()
          eval_binary_feature(feature_dict, 'name', lambda x, y: x == y, 'xx', 'xx')
          self.assertEqual(feature_dict.get('name[0]'), 1)
          self.assertEqual(len(feature_dict), 1)
  
          feature_dict = FeatureDictionary()
          eval_binary_feature(feature_dict, 'name', lambda x, y: x == y, 'xx', 'yy')
          self.assertEqual(feature_dict.get('name[0]'), None)
          self.assertEqual(len(feature_dict), 0)
  
  if __name__ == '__main__':
      unittest.main()
subject: Add test for binary feature evaluator