Recursive Digit Sum

recursive_digit_sum

{
function recuresiveSum(number){
  finalRecursiveSum = 0;
  while(number){
	digit = number % 10;
	finalRecursiveSum += digit;
	if (finalRecursiveSum>9) finalRecursiveSum -=9;
    number = (number-digit)/10
  }
  return (finalRecursiveSum);		
}


function runTestforFixedValues() {
  fixedValues = [0,1,10,123,999,1000,123456789];
  fixedValues.map(function(number){
    console.log("" + number + "-----" +recuresiveSum(number));
  });
}

function runTestforRandom() {
  randomValues = [];
  max = 10000;
  number = getRandomNumber(1,max);
  console.log("" + number + "-----" +recuresiveSum(number));
}

function runTests() {
  console.log("===========================================");
  console.log("Running Tests for Fixed Values\n");
  runTestforFixedValues();
  console.log("\nRunning Tests for \n");
  loop(runTestforRandom, 10);
}



function getRandomNumber(start = 1, end = 10) {
  if (start > end) {
    [start, end] = [end, start];
  }
  let range = end - start + 1;
  return (parseInt(Math.random() * range) % range) + start;
}

const loop = (fn, times = 5, params = []) => {
  if (!times) {
    return;
  }
  fn(...params);
  loop(fn, times - 1, params);
};

runTests();
}