That's interesting. I recently started to use Cucumber with Rails, which looks like another step in BDD with specs written in look-alike natural language. Hard to beat in terms of readibility, even with the Smalltalk syntax. But that's another topic. http://cukes.info/ On topic I started to read the GOOS book written by two pioneers of mocks, and I think it's a recommended reading on the topic of objects + TDD + mock. Just read the first chapters for now but it's in line with my own conception of objects yet offers some interesting insights about design. I think Tim McKinnon which has been a regular participant of Smalltalk events in the past years might have a word or two on the topic :) http://www.growing-object-oriented-software.com/ -- View this message in context: http://forum.world.st/Proposal-for-Mock-Objects-at-ESUG-2011-tp3554367p35549... Sent from the ESUG mailing list archive at Nabble.com.