TST : special case pathexists for None

tacaswell · tacaswell · commit b7e0719720a6 · 2014-10-01T17:06:40.000-04:00
There seems to be a bit more magic involved in setting up
datapath
diff --git a/lib/matplotlib/rcsetup.py b/lib/matplotlib/rcsetup.py
@@ -66,6 +66,8 @@ def validate_any(s):
 
 def validate_path_exists(s):
     """If s is a path, return s, else False"""
+    if s is None:
+        return None
     if os.path.exists(s):
         return s
     else:
