merge: incorporate fix/b6-local-file-iter into fix/b10-local-file-len

Merge __iter__ fix (filter non-.json files, use name[:-5] for suffix
removal) together with __len__ fix (case-insensitive .json filter).
Apply consistent f.lower().endswith(".json") to both methods.
Keep both test_add_and_len_consistent and test_iter_ignores_non_json_files.

Closes #499

Author: zrgt

sdk/basyx/aas/backend/local_file.py

@@ -161,7 +161,8 @@ def __iter__(self) -> Iterator[model.Identifiable]:
         """
         logger.debug("Iterating over objects in database ...")
         for name in os.listdir(self.directory_path):
-            yield self.get_identifiable_by_hash(name.rstrip(".json"))
+            if name.lower().endswith(".json"):
+                yield self.get_identifiable_by_hash(name[:-5])
 
     @staticmethod
     def _transform_id(identifier: model.Identifier) -> str:

sdk/test/backend/test_local_file.py

@@ -121,6 +121,19 @@ def test_add_and_len_consistent(self) -> None:
         self.assertEqual(len(example_data), len(self.identifiable_store))
         os.remove(stray)
 
+    def test_iter_ignores_non_json_files(self) -> None:
+        example_data = create_full_example()
+        for item in example_data:
+            self.identifiable_store.add(item)
+
+        # Stray files must not crash the iterator or be yielded
+        stray = os.path.join(store_path, ".DS_Store")
+        with open(stray, "w") as f:
+            f.write("stray")
+        items = list(self.identifiable_store)
+        self.assertEqual(5, len(items))
+        os.remove(stray)
+
     def test_reload_discard(self) -> None:
         # Load example submodel
         example_submodel = create_example_submodel()