package com.lec.test;$$public interface Order $\{$ public double getPrice$($FoodItem item$)$;$$ public double tax$($double price$)$;$//10\%$ tax$\}$

package com.lec.test;$$public class FoodItem $\{$ private String menuId;$$ private String name;$$ private int quantity;$$ public FoodItem$($String menuId, String name, int quantity$)\{$ this.menuId $=$ menuId;$$ this.name $=$ name;$$ this.quantity $=$ quantity;$\}$ public String getMenuId$()\{$ return menuId;$\}$ public void setMenuId$($String menuId$)\{$ this.menuId $=$ menuId;$\}$ public String getName$()\{$ return name;$\}$ public void setName$($String name$)\{$ this.name $=$ name;$\}$ public int getQuantity$()\{$ return quantity;$\}$ public void setQuantity$($int quantity$)\{$ this.quantity $=$ quantity;$\}\}$

package com.lec.test;$$import java.util.List;$$public class OrderCart $\{$ private Order order;$$ private List items;$$ public Order getOrder$()\{$ return order;$\}$ public void setOrder$($Order order$)\{$ this.order $=$ order;$\}$ public List getItems$()\{$ return items;$\}$ public void setItems$($List items$)\{$ this.items $=$ items;$\}$ public double getTotalPrice$()\{$ double totalAmount $=0\mathrm{.}0$;$$ for$($FoodItem item:items$)\{$ System.out.println$($item$.$getName$()+""+$ item.getQuantity$())$;$$ totalAmount $+=$ order.getPrice$($item$)*$ item.getQuantity$()$;$\}$ totalAmount $=$ totalAmount $+$ order.tax$($totalAmount$)$;$$ return totalAmount;$\}\}1.$The code above implement a $$McDonald$\text{'}$s Ordering System$.$ Each branch can create its own menu but unfortunately, the price is determined by the head office. $($FoodItem class is designed to create a menu but you should use Order interface to get the price of each menu. Also you can ask amount of tax using the same interface$)$

$2.$Implementing the Order Interface is not your task. Your task is to test the $$getTotalPrice$$ method. $($Keep in mind, to test $$getTotalPrice$,$ you should ask a price to head office using the Order interface$)$

$3.$Test the $$getTotalPrice$$ method using Mockito