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Comment by thdhhghgbhy

16 hours ago

Is there something this nice for JS, with the decorators like that?

5 comments

thdhhghgbhy

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ngruhn  15 hours ago

No decorators, but fast-check has add-ons to various test frameworks. E.g. if you use Vitest you can write:

    import { test, fc } from '@fast-check/vitest'
    test.prop([fc.array(fc.double())])('sort is correct', (lst) => {
      expect(lst).toEqual(lst.toSorted())
    })

https://www.npmjs.com/package/@fast-check/vitest?activeTab=r...

  • chamomeal  10 hours ago

    Fast check is fantastic!! I found it to be pretty verbose but I think that’s just a typescript limitation. It’s VERY well typed, which was a nice surprise. Such a great library. Shrinking, model based testing, it’s really comprehensive

aidos  15 hours ago

Not decorators (or at least not last time I looked) but we use fast-check.

Was already familiar with and using Hypothesis in Python so went in search of something with similar nice ergonomics. Am happy with fast-check in that regard.

https://fast-check.dev/

eru  15 hours ago

The decorators are a nice approach in Python, but they aren't really core to what Hypothesis does, nor what makes it better than eg Haskell's QuickCheck.