Raise if file to be read doesn't exist - Tests still missing

mne_bids/read.py

@@ -30,6 +30,9 @@
 def _read_raw(raw_fpath, electrode=None, hsp=None, hpi=None,
               allow_maxshield=False, config=None, verbose=None, **kwargs):
     """Read a raw file into MNE, making inferences based on extension."""
+    if not raw_fpath.exists():
+        raise FileNotFoundError(f'File or folder not found: {raw_fpath}')
+
     _, ext = _parse_ext(raw_fpath)
 
     # KIT systems
@@ -485,11 +488,11 @@ def read_raw_bids(bids_path, extra_params=None, verbose=True):
     bids_fname = bids_path.fpath.name
 
     if op.splitext(bids_fname)[1] == '.pdf':
-        bids_raw_folder = op.join(data_dir, f'{bids_path.basename}')
-        bids_fpath = glob.glob(op.join(bids_raw_folder, 'c,rf*'))[0]
-        config = op.join(bids_raw_folder, 'config')
+        bids_raw_folder = data_dir / f'{bids_path.basename}'
+        bids_fpath = list(bids_raw_folder.glob('c,rf*'))[0]
+        config = bids_raw_folder / 'config'
     else:
-        bids_fpath = op.join(data_dir, bids_fname)
+        bids_fpath = data_dir / bids_fname
         config = None
 
     if extra_params is None: