FizzBuzz en javaScript https://cyber-dojo.org/kata/edit/EXa7qp

fizzbuzz.js

'use strict';

module.exports = {
  answer
};

function answer(number) {
  if (number % 15 === 0) {
    return "FizzBuzz";
  }
  if (number % 5 === 0) {
    return "Buzz";
  }
  if (number % 3 === 0) {
    return "Fizz";
  }
  return number;
}

fizzbuzzTest.js

'use strict';

const hiker = require('./hiker.js');
const assert = require('assert');

assert.equal(hiker.answer(1), 1);
assert.equal(hiker.answer(3), "Fizz");
assert.equal(hiker.answer(5), "Buzz");
assert.equal(hiker.answer(15), "FizzBuzz");


// - - - - - - - - - - - - - - - - - - - - - -

const greenTrafficLightPattern = function() {
  return 'All tests passed';
};
console.log(greenTrafficLightPattern());