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Is there a `shouldRaiseAccumulate`  and `shouldNotRaiseAccumulate` to test error-accumulating functions? Or do I always need to wrap my block in another `accumulate {..}`  when testing?

This is more in the realm of matching libraries; Kotest provides one, but it would be nice to have support for more

Ah right. Unfortunately, kotest-assertions does cover `Raise` only, not `RaiseAccumulate`.

You could also use `iorAccumulate` and assertions on that, akin to using `either` for testing `Raise`
In fact, it'll give you slightly more info than just wrapping your code in `accumulate`: `accumulate` fails on any raised error, while `iorAccumulate` does not. For an analogy, `accumulate` turns your `Ior` into an `Either` by turning `Both` into `Left`

I don't remember if the <https://github.com/assertj/assertj-arrow-core|https://github.com/assertj/assertj-arrow-core> has one, but in case you can open an issue :grimacing: