It's normal practise use [].someFn .call()/.apply(). If you like save memory, why you chose JS?

Please help.
What do tests mean? What arguments do they receive?
"Single pair of end caps defined - no nesting"
"Multiple pairs of end caps defined - no nesting"
"Single pair of end caps defined - with nesting"
"Multiple pairs of end caps defined - with nesting"
"Multiple open and close caps are same character - with nesting"

Balanced and unbalanced case. I wrote a function that works perfectly and I can't break my function.

When you create kata please write description's tests smarter.

I can't understand next:
Time: 323ms Passed: 33 Failed: 8
Single pair of end caps defined - no nesting
Balanced
✘ Expected: true, instead got: false

Single pair of end caps defined - with nesting
Balanced
✘ Expected: true, instead got: false
✘ Expected: true, instead got: false
✘ Expected: true, instead got: false

Multiple pairs of end caps defined - with nesting
Balanced
✘ Expected: true, instead got: false
✘ Expected: true, instead got: false

Multiple pairs of end caps defined - no nesting
Balanced
✔ Test Passed: Value == true
✘ Expected: true, instead got: false

Multiple open and close caps are same character - with nesting
Balanced
✘ Expected: true, instead got: false

For people who speak English a little hard translate this description. If I see what function receive and what tests want in output I guess how function must work.

Sorry for incorrect mark. Nice kata. Be stronger in algorithms.

So simply :)

Yes. You're right. Why n(1) => 81; n(2) => 512 etc. What does function return when n is 5?

I can't understand what does function receive? Tell more for dummies

JS:
Passed: 199 Failed: 6
Basic tests are passed. How can I guess why random test are failed? If I get next answers:
Testing fortune:
✘ Expected: true, instead got: false

JS:

✔ Test Passed: Value == [-2,-1,3]
✘ Expected: [[-3,-2,5],[-3,-1,4],[-3,1,2],[-2,-1,3]], instead got: [[-3,1,2],[-2,-1,3],[-3,-1,4],[-3,-2,5]]
✘ Expected: [[-3,-2,5],[-3,-1,4],[-3,1,2],[-2,-1,3]], instead got: [[-3,1,2],[-2,-1,3],[-3,-1,4],[-3,-2,5]]
✔ Test Passed: Value == No combinations
✔ Test Passed: Value == No elements to combine

What's wrong in my case? What order does compiler want?

JS version:

arr = [1, -1, 2, 3, -2, 4, 5, -3, -3, -1, 2, 1, 4, 5, -3 ]
n = 3
find_zero_sum_groups(arr, n) == [[-3, -2, 5], [-3, -1, 4], [-3, 1, 2], [-2, -1, 3]]

P.S. In this case what about combinations [-2,1,1] and [-1,-1,2]? They must be in array, isn't it?