on my phone, but are you familiar with https://github.com/gfredericks/test.chuck? I’ve previously used string-from-regex for this. I’ve also more recently been using the faker library with malli to generate reasonable looking data if you’re not testing the extremes of the data itself (and don’t need smart shrinking)

I can whip one up if you'd like Tldr is I'd break it down to its components first, then compose their generators

with generators I think the question is always what’s “interesting” and in scope for the “purpose” of the output. If you’d like to test the limitations of the email string itself @UK0810AQ2 approach of composing from smaller generators is sound.

Actually

I figured it out

thre is an undocumented re-gen!!!

It pays to look at the source code

[:foo/email-address [:re {:gen/re-gen [email-pattern]} email-pattern]]

Yeah but the email regex is a monster

Yeah, it's hairy, been there before on validating email. I'll take a pragmatic approach.

I tried to search but it's kind of nebulous lol

They have implementation differences that leak into your code in surprising ways (if you're not aware of them). I suggest using :int by default. :) See e.g: https://github.com/metosin/malli/issues/636 https://github.com/metosin/malli/issues/327

ah yeah, i remember seeing that a while back. that's annoying

This was very interesting