fix tests

owl2yams/__init__.py

@@ -104,7 +104,7 @@
     # 1. fetch all classes
     for class_res in owl_model.query(class_query):
         class_uri = class_res.uri
-        if isinstance(class_uri, BNode):
+        if isinstance(class_uri, BNode) or class_uri.startswith(XSD):
             continue
         class_fragment = fragment_from_uri(class_uri, titling=True)
         if class_fragment is None:
@@ -162,7 +162,7 @@
         # take first range, if no range use RDFS.Literal
         _, _, literal_type = next(
             owl_model.triples((datatype_property_uri, RDFS.range, None)),
-            (_, _, RDFS.Literal),
+            (None, None, RDFS.Literal),
         )
         yams_type = LITERAL_TYPES_TO_YAMS_TYPES[literal_type]
         domain_fragments = yams_domain_from_urirefs(