A port of my Go's 14 days challenge into Javascript

14_days.js

// Hello again. This time, we will be exploring the
// Date class and object.
//
// The function that we'll make is pretty simple,
// we are going to have a date input, in the form (or type)
// of Date, then we'll add 14 days to it.
//
// But here's the tricky part:
// We'll skip satuday and sundays, so the entire 14 days
// should be on weekdays only, not on weekends.
//
// This is the pseudocode:
//
//      var date = given date
//      var days = 0
//      var output = date
//
//      while (days < 14)
//        var dateInDay = convertToDay(output)
//        switch dateInDay
//          case "saturday"
//            output = output + 1 day
//            continue
//          case "sunday"
//            output = output + 1 day
//            continue
//          default
//            output = output + 1 day
//            days += 1
//        end
//      end
//
//      return output
//
// But this pseudocode has a problem:
// What if the date stops at weekends?
// There's your challenge!
// 
// Good luck!
function Add14Days(date) {
    let output;
    // Do things here!
    return output;
}

console.log("Oh, hello there! Let's test your code.");

const tests = [
    {
        i: new Date(2021, 12, 1, 0, 0, 0, 0),
        e: new Date(2021, 12, 21, 0, 0, 0, 0),
    },
    {
        i: new Date(2021, 11, 1, 0, 0, 0, 0),
        e: new Date(2021, 11, 18, 0, 0, 0, 0),
    },
    {
        i: new Date(2021, 11, 30, 0, 0, 0, 0),
        e: new Date(2021, 12, 20, 0, 0, 0, 0),
    }
]

for (let j = 0; j < tests.length; j++) {
    const {i, e} = tests[j];
    const r = Add14Days(i);
    if (r !== e) {
        console.log(`--- Test ${j} failed. Expected ${e}, got ${r}`);
    } else {
        console.log(`--- Test ${j} passed.`);
    }
}

console.log('The test is completed.');