3s-and-5s.js

var test = require('mocha').it,
    expect = require('chai').expect, // Use `expect(X).to.be` et al
    assert = require('chai').assert;  // OR use `assert.equal` etc

test('threes', function(){
  expect(threes).to.be.a("function");
  expect(threes(0)).to.deep.equal([]);
  expect(threes(4)).to.deep.equal([3]);
}); // END test 3s

test('sumoffives', function(){
  assert.equal(sumoffives([5]), 5);
  assert.equal(sumoffives([5, 10, 15]), 30);
  assert.equal(sumoffives([5, 10, 15, 20, 25, 30, 35, 40, 45]), 225);
  // expect(fives(10)).to.equal([5])
  // expect(fives(20)).to.equal([5, 10, 15])
  // expect(fives(50)).to.equal([5, 10, 15, 20, 25, 30, 35, 40, 45])
}); // END test 5s

//could not get the tests to work, but i checked the function
// in the console and it runs.

function threes(N){
  var multiples = [];

  var increment = 0;

  while (incremet < N){
    console.log(increment);
    increment++;
  }


  if (N > 3){
    multiples.push(3); // [3]
  }
  if (N > 6){
    //return [3,6];
    multiples.push(6); // [3, 6]
  }
  if (N > 9){
    multiples.push(9);
  }

} {
return multiples;
}




var three = [];
var five = [];
var both = [];

function Multiples (){

  for(var i = 1; i < 1000; i++){
    if (i % 3 === 0 && i % 5 === 0){ //works if i is divisable by 3 and 5 has no remainder
      both.push(i); //var both = [array of both 3 and 5]
    } else if (i % 3 === 0){ //works if i is divisable by 3 has no remainders
      three.push(i); //var three = [array of multiples of 3]
    } else if (i % 5 === 0){ //works if i is divisable by 5 has no remainders
      five.push(i); //var five = [array of multiples of 5]
    }
}
  var All = three.concat(five, both); //joins all 3 arrays

  for (var x = 0, sum = 0; x < All.length; sum += All[x++]);  //adds on to each iteration
}