Shoot for 100% coverage (#822)

Author: joshmoore

zarr/storage.py

@@ -1247,17 +1247,6 @@ def __init__(self, suffix='', prefix='zarr', dir=None, normalize_keys=False,
 _prog_number = re.compile(r'^\d+$')
 
 
-def _nested_map_ckey(key):
-    segments = list(key.split('/'))
-    if segments:
-        last_segment = segments[-1]
-        if _prog_ckey.match(last_segment):
-            last_segment = last_segment.replace('.', '/')
-            segments = segments[:-1] + [last_segment]
-            key = '/'.join(segments)
-    return key
-
-
 class NestedDirectoryStore(DirectoryStore):
     """Storage class using directories and files on a standard file system, with
     special handling for chunk keys so that chunk files for multidimensional

zarr/tests/test_dim_separator.py

@@ -40,7 +40,7 @@ def dataset(tmpdir, request):
         store_class = NestedDirectoryStore
     else:
         if have_fsspec is False:
-            pytest.skip("no fsspec")
+            pytest.skip("no fsspec")  # pragma: no cover
         store_class = FSStore
         kwargs["mode"] = "w"
         kwargs["auto_mkdir"] = True