fix(jsonld renderer): stable ordering

Author: aaxelb

trove/render/jsonld.py

@@ -147,13 +147,9 @@ def _list_or_single_value(self, predicate_iri: str, objectlist: list):
                 return None
             else:
                 return _only_obj
-        if predicate_iri in _PREDICATES_OF_FLEXIBLE_CARDINALITY:
-            return (
-                objectlist
-                if len(objectlist) != 1
-                else objectlist[0]
-            )
-        return objectlist
+        if predicate_iri in _PREDICATES_OF_FLEXIBLE_CARDINALITY and len(objectlist) == 1:
+            return objectlist[0]
+        return sorted(objectlist, key=_naive_sort_key)
 
     @contextlib.contextmanager
     def __visiting(self, iri: str):
@@ -165,3 +161,8 @@ def __visiting(self, iri: str):
 
     def __already_visiting(self, iri: str) -> bool:
         return bool(self.__visiting_iris and (iri in self.__visiting_iris))
+
+
+def _naive_sort_key(jsonable_obj):
+    _json = json.dumps(jsonable_obj)
+    return (len(_json), _json)