Also if you are doing some sort of setup, use a ``before`` block:

https://www.relishapp.com/rspec/rspec-core/v/2-0/docs/hooks/before-and-after-hooks

```
before { 
   input.list_items.each do |item|
    cart.add_item_cart(item)
 end
 cart.checkout
 cart
}
```