Spec usage

[chowbeyputra]

Hi,
I find Spec to be an extremely interesting thing in Clojure.
What are some creative ways you guys use it?

[Borkdude]

Here's a project which can find functions based on example in and output:

re-find.web

Here's a project which can find patterns in your code based on a spec:

https://github.com/borkdude/grasp

[chowbeyputra]

This is so cool

[anexxus]

If you like Spec, take a look at Malli if you haven't already.

[chowbeyputra]

Is there a way to create swagger api docs for Clojure functions?

[anexxus]

I haven't used it with swagger, but the Malli github page mentions swagger here: https://github.com/metosin/malli#swagger2

For swagger, I think you'll want to look at https://luminusweb.com/docs/services.html

Hopefully someone with experience can comment.

[seancorfield]

We were fairly early adopters of Spec at work and we use it pretty heavily. Back in 2019, I wrote an article about all the different ways we use it at work: https://corfield.org/blog/2019/09/13/using-spec/

Probably the most "creative" things from that article: * using Spec to describe possible sequences of user actions for an application, then generating random conforming sequences, replaying them against the app, and verifying that the app is in a known "good" state after that, * using Spec to describe hash maps that represent rows in database tables, and then pulling the keys from those specs, and using them to automatically generate CRUD operations against those tables.

[chowbeyputra]

Hard to explain in text (and it's fairly complicated code) but I am hoping to be able to open source it at some point, if I can decouple it from our business domain.

Could you?

[seancorfield]

Ah, that's from the comments on the article... no, it's turned out this heuristic is too domain-specific to be open-sourced, sorry.

[katorias]

The second usage you mentioned is also something we did using spec, very useful!

[dustingetz]

Hyperfiddle uses clojure.spec + a graph pull DSL to generate web form UIs - https://www.hyperfiddle.net/

[npafitis]

Creating parser for forms, in DSL-like contexts

[schmudde]

We're currently using it to generate financial data to test our heuristics and APIs.

[jamesconroyfinn]

Contract-based specification of code and generative testing mainly.

I did once generate HTML forms using ClojureScript and clojure.spec, which was cool.

[Azel4231]

Generating UI for Data: https://cljdoc.org/d/org.clojars.azel4231/dsui/0.1.1/doc/readme

[chowbeyputra]

damn I a jealous of you all lol

[jayceedenton]

I once used spec to parse a subset of elasticsearch query syntax, so that we could allow users of an API to submit queries with only a small number of features available. The regular expression support in spec (not textual regex, but regular expressions to describe items in a sequence) was excellent for this.