Fix an RPOP corner case that only worked for LPOP

bmerry · bmerry · commit 03880a9b4f3e · 2021-11-15T12:49:45.000+02:00
Popping 0 elements from a list in Redis 6.2.6 is not an error even if
the key is the wrong type. This was correctly implemented for LPOP, but
for RPOP it wasn't done correctly (picked up by hypothesis).
diff --git a/fakeredis/_server.py b/fakeredis/_server.py
@@ -1853,7 +1853,7 @@ def ltrim(self, key, start, stop):
                 key.update(new_value)
         return OK
 
-    @command((Key(list),), (Int(),))
+    @command((Key(),), (Int(),))
     def rpop(self, key, *args):
         return self._list_pop(lambda count: slice(None, -count - 1, -1), key, *args)
 
