I'll mark this as resolved.

Your code will fail when either array1 or array2 is None

Your current latest solution will always return "" after the first character in text is read. Also, the output format is also wrong for res

The step list will not necessarily be a palindrome. For instance, if I walk [n, w, w, s, e, s, e, n] , I have returned to my starting location. Your solution will check if [n, w, w, s, e, s, e, n] == [n, e, s, e, s, w, w, n] , which will return False.

I see.

I'll read again about how to log the failed test.

Thank you.

You're misreading the logs, your code fails the 4th test, not the 1st.

But as far as I understand, 1st test case is supposed to return "true", like my code is; not "false".

From de default test cases:

assert.isTrue(isValidWalk(['n','s','n','s','n','s','n','s','n','s']), 'should return true');

But shouldn't that be enough to return "true" in the the 1rst test case?

And that's exactly what is happening. Just like the message indicates, your code incorrectly returns true when it should return false.