--- a/tests/objects.py	Fri May 27 18:43:14 2011 -0700
+++ b/tests/objects.py	Fri May 27 18:56:00 2011 -0700
@@ -5,6 +5,16 @@
 def stringsort(*strings):
     return ''.join(sorted(''.join(strings)))
 
+class StringMunge(object):
+    def __init__(self, prefix, delimeter=':', callback=None):
+        self.delimeter = delimeter
+        self.prefix = prefix
+        self.callback = callback
+    def __call__(self, string):
+        if self.callback:
+            string = self.callback(string)
+        return self.prefix + self.delimeter + string
+
 class Foo(object):
     def __init__(self, a, b):
         self.factor = a*100 + b