Closing.

109 is not decrementing, 1 > 0 but 0 < 9, check the description again:

‡ For decrementing sequences, 0 should come after 1, and not before 9, as in 3210.

My code where there's a number that has more than 1 option, for example, the number 109, it's decrementing (1, 0, 9) and if you add 2 it becomes 111. The problem is, that if I move the part of the code that takes care checking that a palindrome number is 2 miles or less away, other cases break. I'll have to find the order so that there's no problem.

I just did, thx. I didn't know that I could log things in the web console

have you tried printing the inputs?

Can someone tell me what the test cases are? Not the regular ones, the advanced ones. I'm 99% sure my solution should work. In most upcoming cases I get 0 as result and expected 1. For example, in intelij I run my own test for incrementing/decrementing upcoming numbers, for example 987654320 and get 1 as result. Same with 1234565, but in the kata tests the code doesn´t pass and I'm not sure why. I tested every scenario and it returns what I expect in intelij, but not in the kata

I don't remember the exact number but it's around 5.5k I think

I'm not saying it's impossible but, a good indicator about the testing being faulty or not is the number of completions:

Java Completions 3048

With that many, the chances of the testing being faulty are very slim. And yes, those brackets in Java are somewhat strange, but that's how it works in JUnit to highlight the difference. Cheers.

Thanks man, I didn't know what label to put because I didn't know that 1[306, 1]676 ment 1306 and 1676 and I thought maybe it was an issue with the testing part.

That you missed 1306 in your returned value. That's how Java testing framework shows the difference. Use Question label next time when the problem is with your code and not with the kata.

I don't really understand what the problem is with my code. expected:<[518, 598, 1[306, 1]676, 2427]> but was:<[518, 598, 1[]676, 2427]>.
What does 1[306, 1] mean in this case?