test.adapter.xml.xml_deserialization: make OperationVariable tests more explicit

Author: jkhsjdhjs

test/adapter/xml/test_xml_deserialization.py

@@ -232,7 +232,7 @@ def test_operation_variable_no_submodel_element(self) -> None:
             </aas:submodel>
         </aas:submodels>
         """)
-        self._assertInExceptionAndLog(xml, "aas:value", KeyError, logging.ERROR)
+        self._assertInExceptionAndLog(xml, ["aas:value", "has no submodel element"], KeyError, logging.ERROR)
 
     def test_operation_variable_too_many_submodel_elements(self) -> None:
         # TODO: simplify this should our suggestion regarding the XML schema get accepted
@@ -266,6 +266,7 @@ def test_operation_variable_too_many_submodel_elements(self) -> None:
         with self.assertLogs(logging.getLogger(), level=logging.WARNING) as context:
             read_aas_xml_file(io.BytesIO(xml.encode("utf-8")), failsafe=False)
         self.assertIn("aas:value", context.output[0])
+        self.assertIn("more than one submodel element", context.output[0])
 
     def test_duplicate_identifier(self) -> None:
         xml = _xml_wrap("""