code: def test_length(self):
      # NliLength only add a sentence to hypothesis, which means transformed
      # sample has longer hypothesis and the length of premise stay the same
      trans = nli_length.transform(sample1)
      self.assertEqual(
          len(sample1.premise.field_value),
          len(trans[0].premise.field_value),
      )
      self.assertTrue(
          len(sample1.hypothesis.words) < len(trans[0].hypothesis.words)
      )
  
file_path: textflint/test/generation/transformation/NLI/test_add_sent.py
imports: import unittest
  from textflint.input.component.sample.nli_sample import NLISample
  from textflint.generation.transformation.NLI import AddSent
label_desc: Use image node_id 3 for calling the TestNliLength obj's underlying member method code with example usage: obj.test_length() without return types