Describe: Pizza()

Test: It will return a Pizza object with properties for size and toppings.
Code: let newPizza = Pizza("m", ["olives", "mushrooms"], ["pepperoni"]);
Expected Output:
  Pizza {
    size: "m"
    veg toppings: ["olives", "mushrooms"]
    meat toppings: ["pepperoni"]
  }

Describe: Pizza.prototype.addVegTopping

Test: It will add a new topping to the veggie toppings array.
Code: 
  newPizza.addVegTopping("mushrooms");
  newPizza;
Expected Output:
  Pizza {
    size: "m"
    veg toppings: ['mushrooms']
    meat toppings: []
  }

Describe: Pizza.prototype.addMeatTopping

Test: It will add a new topping to the meat toppings array.
Code: 
  newPizza.addMeatTopping("pepperoni");
  newPizza;
Expected Output:
  Pizza {
    size: "m"
    veg toppings: []
    meat toppings: ['pepperoni']
  }

Describe: Pizza.prototype.getPrice

Test: It will determine the price of the pizza, based on size.
Code: 
  let newPizza = new Pizza("m");
  newPizza.getPrice();
Expected Output: 18

Test: It will determine the price of the pizza, based on size and toppings.
Code: 
  let newPizza = new Pizza("m", ['mushrooms'])
  newPizza.getPrice();
Expected Output: 19

Test: It will determine the price of the pizza, based on size and toppings.
Code: 
  let newPizza = new Pizza("m", ['mushrooms'], ['pepperoni'])
  newPizza.getPrice();
Expected Output: 21