code: def test_entity_type(self):
      self.assertEqual("movie", SwapSpecialEnt("movie").entity_type)
      self.assertEqual("person", SwapSpecialEnt("person").entity_type)
      self.assertRaises(ValueError, SwapSpecialEnt, "person_movie")
  
imports: import unittest
  from textflint.input.component.sample.sa_sample import SASample
  from textflint.generation.transformation.SA.swap_special_ent import SwapSpecialEnt
label_desc: Use image node_id 1 for calling the TestSwapSpecialEnt obj's underlying member method code with example usage: obj.test_entity_type() without return types