It's quite disturbing that random tests time out without telling me what is the reason – generic slowness of the algorithm or one test run into an infinite loop, but which one? Wasted so much time trying to find edge cases, still no result. I remember now, this is exactly why we abandoned codewars previously. I will not make this mistake again.

This is clever, but how is this a best practice?

You need to add init function to kata_test package, with random seed initialization. like this:

func init() {
rand.Seed(time.Now().UnixNano())
}

ah! rune! Guess the tests didn't mind that mine wasn't unicode-safe. Almost feel like there should be test cases with unicode, but then, this is an 8 kyu kata.

Works now but I'm not 100% sure if it's the right way to set it up, we will see

I had very little time last Monday (weekly code kata) and I don't know where to paste them yet but I'll figure

Thanks for translation. What about random tests?