Coverage for zodburi.datatypes.

zodburi/datatypes.py

@@ -14,7 +14,8 @@ class SuffixMultiplier:
             if self._keysz is None:
                 self._keysz = len(k)
             else:
-                assert self._keysz == len(k)
+                if self._keysz != len(k):
+                    raise ValueError('suffix length missmatch')
 
     def __call__(self, v):
         v = v.lower()