I was just looking around to find a list of Clojure spec related libraries but couldn’t find one… so let’s make one. One library per post, and don’t forget to include a small description of the library and why you like it. :rocket:

I’ll start. metosin/spec-tools is looking like a pretty sweet companion library to spec itself. It allows you to write simple specs in Schema style maps instead of spec’s very flexible but sometimes a little cumbersome format. (def person {::id integer? ::age ::age :boss boolean?}) It also…

When bootstrapping an external API I have come to love https://github.com/stathissideris/spec-provider which allows you to ship in a dataset and get out a reasonable approximation of the specs you would write by hand.

https://github.com/Provisdom/defn-spec Add function args and return Spec checking via assertions It conforms to the spec of defn.

[image] gnl/ghostwheel Hassle-free clojure.spec, automatic generative testing, side effect detection, and evaluation tracing for Clojure(-Script) - gnl/ghostwheel

Expound . Excellent error messages for spec assertions.

I’ve been meaning to check https://github.com/reifyhealth/specmonstah which apparently allows the generation of deeply-nested, hierarchical graphs of business data, but I haven’t had the chance yet.

https://github.com/wilkerlucio/spec-coerce is a very good companion library, I’ve started using it for API parameter coercion and as an aid to form validation in the frontend. And it has a huge advantage: it does not define it’s own syntax, you just write your specs as normal.

I dislike the fact that spec-tools defines it’s own macros and syntax on top of spec. This seems to be something of a pattern with spec companion libs (defn-spec and ghostwheel do it too), they all go “here is my custom macro for defining specs!”. The end result of course is that you have to choose …

I agree with your point of view. Relative to defn-spec, according to the Pure Function Pipeline Dataflow , I prefer to add a verified-pipeline-function at the beginning and end of the data flow.

About Spec-tools (author here): it’s a collection of things that are missing or out-of-scope of clojure.spec and you can use most of the things without any special syntax of macros: spec parser spec walker spec visitor spec transformer (json, string, your-own) spec coercer spec->json-schema conver…

ClojureVerse

Your favourite clojure.spec companion library?

Questions & Help General Questions

borkdude November 10, 2018, 2:43pm 18

Check out speculative

Try online: http://bit.ly/speculative-repl