add tests for the django test suite

django-stubs/core/files/storage.pyi

@@ -31,10 +31,15 @@ class FileSystemStorage(Storage):
         file_permissions_mode: Optional[int] = ...,
         directory_permissions_mode: Optional[int] = ...,
     ) -> None: ...
+    @property
     def base_location(self) -> str: ...
+    @property
     def location(self) -> str: ...
+    @property
     def base_url(self) -> str: ...
+    @property
     def file_permissions_mode(self) -> Optional[int]: ...
+    @property
     def directory_permissions_mode(self) -> Optional[int]: ...
 
 class DefaultStorage(LazyObject): ...