def test_get_guarantee_type_text(self):
     self.assertIsNone(
         DataHelper.get_guarantee_type_text(
             GuaranteeType.objects.get(pk=0),  # 不明
         ), )
     self.assertEqual(
         DataHelper.get_guarantee_type_text(
             GuaranteeType.objects.get(pk=1), ),
         '必須',
     )
 def guarantee_type_text(self):
     return DataHelper.get_guarantee_type_text(self.guarantee_type)