So close...

Here's are some resources on property testing/fuzz testing that I've been reading lately:

- Property testing in Elixir: propertesting.com
- How to identify properties/invariants: fsharpforfunandprofit.com/series/prope...
- Using fast-check with Cypress: www.youtube.com/watch?v=E42T...

Any others?

Interesting article by @chrispenner.ca about why monads aren't the solution to everything, and a functor I've never crossed paths with called selective applicatives.

Still absorbing it, but great read as always. Check it out if that's your thing.

chrispenner.ca/posts/expres...

This afternoon I was listening to @typescript.fm and was surprised to hear @​traversable/valibot mentioned 🤩

As a long time fan of the podcast, this was super fun.

This is great news! GitHub will require use of passkeys for 2FA when publishing to NPM. What a huge step up in security compared to other phishable 2FA methods that were historically supported 🎉

github.blog/security/sup...

What if deep object comparisons were 10x more performant than they've ever been in JavaScript?

Just re-use your Valibot, ArkType, Zod, or TypeBox schema. It even works with JSON Schema.

Run the benchmarks yourself:
bolt.new/~/mitata-ej4...

Library:
github.com/traversable/...

I also think the implementation is interesting. The workhorse here is the fold function – all 29 libraries are powered by the same abstraction.

Just shipped a zod transformer that turns a zod schema into a recursive to/from snake/camel case codec.

This release also allows users to provide their own key to/from transforms.

Available in @​traversable/[email protected].

Feedback welcome! cc @colinhacks.com

Writing tests is hard, and I'm lazy. I'd rather write a few invariants, and let fast-check fuzz test the rest.

That's why I built @​traversable/valibot-test.

Here it is in action:

This is one of the coolest @valibot.dev utility libraries around! 🔥

It can convert Valibot schemas into stringified TypeScript types. It can also check schemas for equality and clone them. Great job, @ahrjarrett.bsky.social! 🪄

Read the full article on @dev.to: dev.to/ahrjarrett/i...