FizzBuzz

app.js

const testFizzBuzz = (fizzbuzz) => {
  const assert = (value) => {
    if (value === true) {
      return;
    } else {
      throw 'Assertion failed';
    }
  };
  const input = [ ...Array(15).keys() ].map(e=>e+1);
  const output = [
    1,
    2,
    'Fizz',
    4,
    'Buzz',
    'Fizz',
    7,
    8,
    'Fizz',
    'Buzz',
    11,
    'Fizz',
    13,
    14,
    'FizzBuzz'
  ];
  input.forEach((v, i) => {
    assert(fizzbuzz(input[i]) == output[i]);
  });
  console.log('Your fizzbuzz is good to go');
}

const FizzBuzz = (num) => {
  let string = '';
  if (num % 3 == 0) {
    string = string + 'Fizz';
  }
  if (num % 5 == 0) {
    string = string + 'Buzz';
  }
  if (string != '') {
    return string;
  }
  else{
    return num;
  }
}

const GeneralizedFizzBuzzMaker = ([...multiples], [...tokens]) => (num) => {
  let string = '';
  multiples.forEach((v, i) => {
    if (num % v == 0) {
      string = string + tokens[i];
    }
  });
  if (string != '') {
    return string;
  }
  else{
    return num;
  }
}

testFizzBuzz(FizzBuzz);

const defaultFizzBuzz = GeneralizedFizzBuzzMaker([3,5],['Fizz','Buzz']);

testFizzBuzz(defaultFizzBuzz);

const superbFizzBuzz = GeneralizedFizzBuzzMaker([6,10,16,25], ['Fang', 'Bunk', 'Hello', 'World']);

for(let i = 1; i <= 100; i++) {
  console.log('superbFizzBuzz', i, superbFizzBuzz(i));
}

const ultraFizzBuzz = GeneralizedFizzBuzzMaker([2,3,5,7,11,13], ['soso','good','better','great','supergreat','fuckinggood']);

for(let i = 1; i <= 100; i++) {
  console.log('ultraFizzBuzz', i, ultraFizzBuzz(i));
}