# Tweet by [@keefmoon](http://twitter.com/keefmoon) on 2020-04-14 13:44:23 > [!INFO] Archived from [original tweet](http://twitter.com/keefmoon/status/1250057314264113159) In reply to: [@pilky](http://twitter.com/pilky/status/1250055265904406528) @pilky I don't think this is true. If you build stuff in a protocol oriented way, then it's easy to swap out dependancies for mocks and just test small parts.