Your code is wrong, not a kata issue. It reaches the first case where p1 equals something and enters that if, because it doesn't find a match, the code ends there returning undefined. Use this to see how your code works.

And please read this: https://docs.codewars.com/training/troubleshooting

(Rock Paper Scissors) "expected undefined to equal 'Player 2 won!'"
what does this means?
other two sections are passed.