Unit Testable Fizz Buzz

gistfile1.txt

function isMod0(a, b) {
  return a % b === 0;
}

function fb(n) {
  var out = '';

  if (isMod0(n, 3)) out += 'Fizz';
  if (isMod0(n, 5)) out += 'Buzz';

  return out;
}

function go() {
  idx = 0;
  end = 100;

  while(++idx <= end) {
    console.log(idx, fb(idx));
  }
}

exports.fb = fb;
exports.go = go;