[Simpletest-support] Mock functions?

[Douglas H. <dh...@gm...>]

I find mock functions useful because many times I'm writing code that interfaces
with functions and not other objects.  I found I could mock functions with the
library
 http://code.google.com/p/php-mock-function/
without requiring runkit.  Instead I run my tests each in their own process and
control the include files and it works great.  

The php-mock-function library is very alpha and hasn't taken off.

Anyway, I just want to start a conversation on the subject. What are others 
using?

Reference
http://www.workhabit.com/labs/mock-function-testing-drupal