def test_save_returns_errors_if_error_ocurred_during_save(self):
Collection.collection.create_index('test', unique=True)
Collection.insert_one({'test': 'test'})
document = Document(Collection)
document.test = 'test'
errors = document.save()
self.assertEqual(errors['error_code'], 0)
self.assertEqual(errors['error_type'], 'PyMongoError')
Collection.drop_index('test_1')
def test_save_returns_fields_if_document_has_id_and_is_valid(self):
document = Document(Collection)
document._id = ObjectId()
fields = document.save()
self.assertEqual(fields, document._fields)
