Trying to solve an Exercism question, Gigasecond, Javacsript

Question

I am trying to solve a problem: Given a moment, determine the moment that would be after a gigasecond has passed. A gigasecond is 10^9 (1,000,000,000) seconds.Do not mutate the function's arguments.

   const gigasecond = () => {
     \\write your code here 
   };

I wrote a code which I think should solve it, but, I am getting a failed test. My code is:

const gigasecond = () => {
let date = new Date();
const gs = Math.pow(10, 12);
let futureTime = date.getTime() + gs;
return new Date(futureTime)

};

I am really stuck, and not sure what did I miss.

Answer 1

If I add an argument my code will be:

const gigasecond = (time) => {
  let date = time.getTime();
  const gs = Math.pow(10, 12);
  let futureTime = date + gs;

  return new Date(futureTime)
};

and it did pass the first test. I'll cross fingers and see if it is accepted or not.

Answer 2

My solution is as follow:

public static class Gigasecond {
public static DateTime Add(DateTime moment)
   {
       return moment.AddSeconds(Math.Pow(10,9));
   }
}

Answer 3

My Solution is as follows:

import datetime
def add(moment):
    return moment+ datetime.timedelta(seconds=10**9)