Don't use global variables.

Okay, so a couple of things: there are no 30000 tests. there are ~120 tests only.
Your solution makes the test suite confused. As much as I see, it's because of the array parameter which you pass from function to function and mutate on the way, and the array grows, and grows, and then test suite performs assertions on it, and...

Once you get rid of array parameter in your top level function, things should work.

At least that's what I think that happens. That;s what you get for using JS, sorry.

Then it's interesting, because I had no such problem. Maybe you could share your code so we could take a look?

For noobs: https://www.youtube.com/watch?v=Wim9WJeDTHQ :P

I solved the kata in JS without any problem. You need to reduce amount of printing in your solution (or, preferably, remove all of it).

I still do not know what;s so special about 277777788888899 tho.

What language?