new_contents: import unittest
  
  from cybox.objects.file_object import File
  from cybox.test import round_trip
  from cybox.test.objects import ObjectTestCase
  
  
  class TestFile(unittest.TestCase, ObjectTestCase):
      object_type = "FileObjectType"
      klass = File
  
  
      def test_filepath_is_none(self):
          # This would throw an exception at one point. Should be fixed now.
          a = File.from_dict({'file_name': 'abcd.dll'})
  
  
      def test_round_trip(self):
          pass
  
  
  if __name__ == "__main__":
      unittest.main()
  
subject: Add a test related to creating File objects