Add a failing test for Pizza::Topping.initialize.
Create intialize method for Topping class and add attr_accessor for name.
Add a failing test for .vegetarian withinPizza::Topping's initialize method.
Add :vegetarion to attr_accessor and add instance variable @vegetarion in the initialize method for the Topping class.
Add a failing test for testing recording of toppings within Pizza::Pie.initialize
Add initialize method for Pie class and add attr_accessor for toppings
Add failing test to check default number of toppings and default cheese topping for Pizza::Pie.initialize
Set default toppings parameter for the initialize method in the Pie class to a Toppings object called cheese.