def test_error_position_retrieval_is_correct(self):
self.assertEqual(errors.position("abc", 1), "1")
self.assertEqual(errors.position("abc\ndef\nghi", 5), "1:1")
self.assertEqual(errors.position("abc\ndef\nghi", 2), "0:2")
self.assertEqual(errors.position("abc\ndef\nghi", 8), "2:0")
def test_error_position_retrieval_is_none(self):
self.assertIsNone(errors.position("", 666))
