Roy blogs about testability in the language. I definitely think that the language could cater testability, much like it connects with other development needs. For example, in .NET there is the obsolete attribute which we may decorate a method with, which causes the compiler to issue a warning if someone compiles code that uses that method.

Likewise, I have for some time wondered if using an attribute indicating that a method is for testing purposes only would be useful. I think so.

Anyway, thanks for this Roy! It's amazing to see how quickly that debate springs up again! I am doing a workshop on testability and encapsulation and this is definitely inspiring, I almost thought that everyone had already gone past the encapsulation debate and that I wouldn't get anyone to discuss it with - but here is proof that it is not so again!

Hopefully we'll get even more perspectives.