check for empty paths, fixed mps testing

mps used only if not in github actions

cspell.json

@@ -76,6 +76,7 @@
         "timestep",
         "timesteps",
         "toctree",
+        "tqdm",
         "undoc",
         "Unitless",
         "varray",

ramannoodle/io/io_utils.py

@@ -41,6 +41,8 @@ def pathify_as_list(filepaths: str | Path | list[str] | list[Path]) -> list[Path
     """
     if isinstance(filepaths, list):
         paths = []
+        if len(filepaths) == 0:
+            raise ValueError("filepaths is empty")
         for item in filepaths:
             paths.append(pathify(item))
         return paths

test/tests/test_gnn.py → test/tests/torch/test_gnn.py

@@ -118,7 +118,7 @@ def test_gpu(poscar_ref_structure_fixture: ReferenceStructure) -> None:
         device = "cuda"
     # mps backend doesn't work with github runners
     # https://github.com/actions/runner-images/issues/9918
-    elif torch.backends.mps.is_available() and os.getenv("GITHUB_ACTIONS") == "true":
+    elif torch.backends.mps.is_available() and os.getenv("GITHUB_ACTIONS") != "true":
         device = "mps"
     else:
         return