What was your problem yash?? please specify what was the error thrown in the output window.

You have to change the assert_equals to assertEquals, as that is the function in JavaScript. It's an error on the kata maker's part.

same problem here

I kept getting unknown errors when trying to submit a solutions that had passed the test cases.

Frustrated, I gave up and skipped to see the solutions. Surprisingly I had the same solution as many others.

I went back and copy-pasted solutions that had already passed into the exercise, and I still got unknown errors when trying to submit.

My program passes the test cases, but when trying to submit the actual answer I get "unknown error" in return.