def test_remap(self): dic = { 'TEST': 'test', 'another_field': 'content', 'third_field': 'text'} transformer = Transformer(dic) transformer.mappings = {'test': 'TEST', 'field': 'another_field'} self.assertTrue(transformer.is_valid()) res = transformer.cleaned_data self.assertEqual(res['test'], 'test') self.assertEqual(res['field'], 'content') self.assertEqual(res['third_field'], 'text') self.assertNotIn('TEST', res) self.assertNotIn('another_field', res)