RFC: In-Line Tests

[DevAndArtist (Adrian Meister)]

The pitch is very interesting but I already do not like the limitations like a required init(). Have you also considered first class unittest blocks like Joe Groff described in the other thread I created a couple month ago?

The Future of @testable

@testable is best understood as a hack because, IMO, the idea of tests being a separate build product fundamentally runs against the nature of a language with access control. Tests ought to be treated as a fundamental part of the code they validate, just like types are. I would like to see the Swift ecosystem eventually evolve support for tests that sit alongside implementation, much like how they do in the D programming language: In D, a unittest block can appear almost anywhere, and natural…