should be good now, please try again

You should write your own tests there, but I already raised an issue above and maybe they'll change that too.

They work, but the actual and expected values are flipped. Or do you mean there are no Sample tests?

Fatal error: Index out of range is at the top, so it seems you were trying to access a non existant index. I don't know swift but post your code with proper markdown formatting, tag the post as a spoiler, then someone can maybe help you

Write your solution on codewars! It works! That way you don't need to simulate errors... Perhaps you pass all tests elsewhere, but you need to be able to pass hidden tests, including random ones.