ty: detect unresolved references

src/ifc5d/ifc5d/ifc2json.py

@@ -109,6 +109,8 @@ class ifc5D2json:
             values = root_element.CostValues
         elif root_element.is_a("IfcConstructionResource"):
             values = root_element.BaseCosts
+        else:
+            assert False, root_element
         for cost_value in values or []:
             self.extract_cost_value(root_element, data, cost_value)
             # data["CostValues"].append(cost_value.id())

src/ifc5d/ifc5d/ifc5Dspreadsheet.py

@@ -478,6 +478,8 @@ class Ifc5DOdsWriter(Ifc5Dwriter):
                 cell.addElement(P(text=value))
             elif type == "formula":
                 cell = TableCell(formula=value, stylename=style)
+            else:
+                assert False, type
             row.addElement(cell)
 
         def add_cost_item_rows(table, cost_data):
@@ -715,6 +717,8 @@ if __name__ == "__main__":
         writer = Ifc5DOdsWriter(args["input"], args["output"])
     elif args["format"] == "XLSX":
         writer = Ifc5DXlsxWriter(args["input"], args["output"])
+    else:
+        assert False, args
     writer.write()
 
     logger.info("Finished conversion in %ss", time.time() - start)