h4ckademy

fizzbuzz-tdd-kata.js

var fizzbuzz = function(n) {
  var ret = "";
  if(n%3 === 0) {
    ret+= "Fizz";
  }
  if(n%5 === 0) {
    ret += "Buzz";
  }
  return ret || n;
};

/* tddbin.com */
describe('FizzBuzz kata', function() {
  
  /*
    Write a program that prints the numbers from 1 to 100.
    But for multiples of three print “Fizz” instead of the number and for the
    multiples of five print “Buzz”. For numbers which are multiples of both three
    and five print “FizzBuzz”.
  */
  
  it('returns Fizz if multiple of 3 but not of 5', function() {
    var result = 'Fizz';
    assert.equal(fizzbuzz(3), result);
    assert.equal(fizzbuzz(9), result);
    assert.equal(fizzbuzz(3333), result);
  });
  
  it('returns Buzz if multiple of 5 but not of 3', function() {
    var result = 'Buzz';
    assert.equal(fizzbuzz(5), result);
    assert.equal(fizzbuzz(10), result);
    assert.equal(fizzbuzz(5555), result);
  });
  
  it('returns FizzBuzz if multiple of 3 and 5', function() {
    var result = 'FizzBuzz';
    assert.equal(fizzbuzz(0), result);
    assert.equal(fizzbuzz(15), result);
    assert.equal(fizzbuzz(30), result);
    assert.equal(fizzbuzz(1500), result);
  });
  
  it ('returns number if not multiple of 3 nor 5', function(){
    assert.strictEqual(fizzbuzz(1), 1);
    assert.strictEqual(fizzbuzz(44), 44);
    assert.strictEqual(fizzbuzz(808), 808);
  });
  
});

for (var i = 1; i <= 100; i++) {
  console.log(fizzbuzz(i));
}

whyJSdoNotRule.js

var getWithDefault = function(obj, prop, defaultValue) {
  return obj[prop] || defaultValue;
};