I think one shouldn't be friend with their colleagues specially they are tester or manager .. Its hard to manage then.

It just happens and can be awesome. As long as there are some clear boundaries. A manager should know when to gtfo and let the underlings have some freedom. Tester should not be influenced. So discuss the code bits after it's tested.

Never had a dedicated tester in my team but I reckon the same goes as with reviews. Pair programmer reviewing often misses some obvious things because the mindset is synced.

Just don't manage them then. Friendship is magic and therefore way more important than managability.

Being professional means being the best drinking buddy and not asking questions when buddy carries a shovel and a mysterious large bag...

Cause then you can be honest with each other no matter what happens.

@IntrusionCM I like your style!

hey, do me a favor? Will you carry this shovel for me?