code: def test_DoubleDenial(self):
      # test data with two special words
      self.assertEqual(len(swap_ins.transform(sa_sample)), 1)
  
      # test data with no special words
      test_data = {"x": "It's a movie.  actor", "y": "negative"}
      test_sample = SASample(test_data)
      self.assertEqual([], swap_ins.transform(test_sample))
  
      test_data = {
          "x": "It's a go od movie.  ba d actor",
          "y": "negative",
      }
      test_sample = SASample(test_data)
      self.assertEqual([], swap_ins.transform(test_sample))
  
imports: import unittest
  from textflint.input.component.sample.sa_sample import SASample
  from textflint.generation.transformation.SA.double_denial import DoubleDenial
label_desc: Use image node_id 2 for calling the TestDoubleDenial obj's underlying member method code with example usage: obj.test_DoubleDenial() without return types