I don’t see what’s clumsy about it. Is it that ‘stub’ seems to be part of the non-test API and gets exposed in production? I’m not sure why this isn’t just cal

I don’t see what’s clumsy about it. Is it that ‘stub’ seems to be part of the non-test API and gets exposed in production? I’m not sure why this isn’t just called mock-testing. In Scala using tagless final, I’ve seen an entire database layer get mocked. It seems like you can substitute a layer of an effect system if you go beyond the three-layer cake model. Not sure it’s warranted, never did Haskell in production.