(see previous comments)

redid the KATA and removed the duplicate entries and the code worked.

For the designer of this KATA, I hope this information is helpful to you:

I did this KATA using JavaScript and experienced odd results......so:

      I modified it to test for empty arrays (for either arr1 and/or arr2) so that the result 
      could be populated with a minimum of calculations.

      I also used two for loops that used indexOf to see if an element of one array exists in the other.
      I did this in order to avoid the complication of sorting and/or checking for duplicate elements.

What should have resulted is the code should have worked regardless of empty arrays and/or duplicate data. What actually resulted was I still received a boatload of errors on the test results.

I then console logged the array values within the test results to see what was actually being conveyed
as arguments to arr1 & arr2 and tested my code fully outside of the codewars environment
and it executed perfectly.

I am fairly certain that there is an issue with your test cases.

This is the first time I created my own test cases. Thought I followed the directions properly and created this line:

Test.assertEquals(pascalsTriangle(5), [ 1, 1, 1, 1, 2, 1, 1, 3, 3, 1, 1, 4, 6, 4, 1 ]); The first argument being the function with its argument stated, and the 2nd argument being the answer expected. ...not sure what I did wrong.

Secondly, I hit submit to have the creaters test cases run and passed all the tests. ...Also did not get a final submit button to show.

Help would be greatly appreciated.