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fast-check
@fast-check.dev
🎲 Property-based testing for JavaScript and TypeScript compatible with Vitest, Jest and others · Official website at https://fast-check.dev · Made with ♥️ by @nicolas.dubien.me
Just added a banner on top of the documentation to make it clear 👍
February 7, 2025 at 12:37 PM
Happy New Year 🎆
December 31, 2024 at 11:53 PM
🎅✨ Advent of PBT 2024 · Day 18 ✨🎅

Santa’s journey-planning algorithm is live, but can it truly optimize his route? This year, every kilometer counts, and potential delays could risk Christmas!

Ensure Santa’s path is optimal 🏠➡️🎁

👉 Dive into today’s puzzle: fast-check.dev/blog/2024/12...
December 18, 2024 at 8:15 AM
🎄 Day 16: Debugging Santa Codes! 🎅

Santa’s new counting system ensures every number differs by exactly one bit. Ingenious—but are the elves' algorithms bug-free? 🛠️

Can you find an input that breaks their "flawless" implementation? Christmas is in your hands! ✨

👉 fast-check.dev/blog/2024/12...
December 16, 2024 at 8:09 AM
🎄 Day 15: Santa’s Shelf Shenanigans! 🎅

Santa replaced his trusty conveyor belts with a new shelf system—but something’s not quite right. Can you uncover the edge cases in how toys are placed and retrieved?

Christmas depends on your testing skills! 🛠️✨

👉 fast-check.dev/blog/2024/12...
December 15, 2024 at 5:33 AM
I think the code provided in the "download the source: here" part works. I'm currently fixing the sandbox. Sorry for the inconvenience
December 6, 2024 at 6:32 PM
And we might bring some stickers with us 🤫
November 30, 2024 at 5:58 PM
Or even this one
November 22, 2024 at 12:51 AM
Just attempted two test-cases just to give an ideas of how it could look like.
November 22, 2024 at 12:43 AM
📈 Lately we passed the 2 million downloads per week on #npm. Next target will be the monthly 10.

Thank you all for your trust and support 🥳
November 21, 2024 at 8:26 PM
We just updated the social links on our official documentation : fast-check.dev 🚀
Welcome to the @bsky.app social links 🦋
November 9, 2024 at 9:13 AM