Minor typing and coverage tweaks.

Author: Julian

referencing/loaders.py

@@ -25,10 +25,10 @@ def from_path(path: Path) -> Iterable[tuple[URI, Resource[Any]]]:
             yield path.as_uri(), Resource.from_contents(contents)
 
 
-def _walk(path: Path):
+def _walk(path: Path) -> Iterable[tuple[Path, Iterable[str], Iterable[str]]]:
     walk = getattr(path, "walk", None)
     if walk is not None:
         yield from walk()
         return
-    for root, dirs, files in os.walk(path):
+    for root, dirs, files in os.walk(path):  # pragma: no cover
         yield Path(root), dirs, files

referencing/tests/test_loaders.py

@@ -45,7 +45,3 @@ def test_absolute_internally_identified(tmp_path):
 def test_empty(tmp_path):
     registry = EMPTY_REGISTRY.with_resources(loaders.from_path(tmp_path))
     assert registry == EMPTY_REGISTRY
-
-
-def test_custom_loads(tmp_path):
-    pass