I had no idea, how to know the "Edges conditions" and that it was necessery check if input array is empty.
Thank You!

Your solution has a bug and does not handle some inputs correctly. If you take a look at results of failed tets you will see that it fails "Edge cases" section. What edge cases did you test in console?

Buggy solutions are not a kata issue.

Is there a way we can see the edgecase testing and random tests? My code passes the normal tests but I cannot begin to debug why it is failing the edge cases. This is in the TS version.

there is a space before Senior

Nice additional info, but not a kata suggestion :-)

Approved

Lua translation!

Your answer is different from the expected one:

['Open', ' Senior', 'Open', ' Senior'] should equal 
['Open', 'Senior', 'Open', 'Senior']

Usually when tests fail it means that the expected solution is not OK.

Is there a reason why I'm failing the tests despite the expected solution being ok? Maybe I am missing something.

Sorry I meant number[][] / [number, number][]. I changed the type to use shorthand syntax rather than generic types

Array<number> and number[] mean the same thing.