- add todo for test the not existing method get_relation see

(#45)

provdbconnector/tests/test_prov_db.py

@@ -2,7 +2,7 @@
 from uuid import UUID
 
 import pkg_resources
-from prov.model import ProvDocument, ProvAgent, ProvEntity, ProvActivity, QualifiedName, ProvRelation
+from prov.model import ProvDocument, ProvAgent, ProvEntity, ProvActivity, QualifiedName, ProvRelation, ProvRecord
 
 from provdbconnector.tests import examples as examples
 from provdbconnector import ProvDb
@@ -443,9 +443,10 @@ def test_save_record(self):
 
         #Save relation
         self.provapi.save_record(relation)
-        db_relation = self.provapi.get_relation(relation.identifier)
 
-        self.assertEqual(db_element, element)
+        # @todo discuss if it a get_relation method is useful, see  https://github.com/DLR-SC/prov-db-connector/issues/45
+        # db_relation = self.provapi.get_relation(relation.identifier)
+        # self.assertEqual(db_element, element)
 
     def test_save_record_invalid(self):
         with self.assertRaises(InvalidArgumentTypeException):
@@ -454,6 +455,12 @@ def test_save_record_invalid(self):
         with self.assertRaises(InvalidArgumentTypeException):
             self.provapi.save_record(examples.primer_example())
 
+        class InvalidProvRecordExtend(ProvRecord):
+            pass
+
+        with self.assertRaises(InvalidArgumentTypeException):
+            self.provapi.save_record(InvalidProvRecordExtend())
+
     def test_save_element(self):
         """
         Try to save a single record without document_di