No, this is the test,

test.assert_equals(spin_words("to"), "to")

it is correct.

test is return worong

I would say that's a bit messy syntax. Function should be declared at least with 'const' keyword.

to is less than five letters, so it should remain unchanged

what if a string doesn't have numbers in it

well, this kata doesn't do that. And, + is an operator.

It converts it to a number, fairly obvious 😉

Yes, read the instructions again and try some tests like this one: enough(20, 5, 5) what is your code returning?

If there is enough space, return 0, and if there isn't, return the number of passengers he can't take.

Your solution is wrong.

No, you had to write you own tests, I've added some now.