mate-academy/py-burger-recipe

Burger Recipe

Please note: read the guideline before starting.

You work at the In-N-Out and make delicious burgers.

Create the BurgerRecipe class. Its __init__ method should accept and save the number of ingredients needed to make a burger, such as cheese, tomatoes, cutlets, eggs, buns, and sauce.

cheese_burger = Burger(buns=2, cheese=2, tomatoes=1, cutlets=1, eggs=1, sauce="ketchup")

You can make burgers with a different number of ingredients and different sauces, for example:

• buns — can range from 2 to 3;
• cheese — can range from 0 to 2;
• tomatoes — can range from 0 to 3;
• cutlets — can range from 1 to 3;
• eggs — can range from 0 to 2;
• sauce — can be ketchup, mayo, or burger.

So, it would be convenient to use descriptors to ensure that the number of ingredients is int in a range mentioned above and the sauce is one of ketchup, mayo, or burger.

The main task is to create the BurgerRecipe class, and for convenience, you should consider the descriptors.

Implement the Validator class that will have such methods:

• the __set_name__ method, which accepts the name of the attribute, adds _ to its beginning, and stores it in the protected_name attribute;
• the __get__ method that returns the attribute value;
• the __set__ method, which sets the attribute value (note that there should be no validation implemented, you should only call it there);
• the validate abstract method, which accepts the value.

Also, you need to implement the Number class, which is the Validator child class. It should have:

• the __init__ method, which accepts and stores the min_value and the max_value;
• the validate method, which checks the value type, and if the type is incorrect, it must raise the TypeError exception with the Quantity should be integer. message. Then it should check whether the value is within min_value and max_value. If it’s not, it should raise the ValueError with the Quantity should not be less than {self.min_value} and greater than {self.max_value}. message.

Last but not least, you need to implement the OneOf validator, which is the child class of the Validator class. It allows to choose one of the provided values and should have:

• the __init__ method, which accepts and stores options;
• the validate method, which accepts the value and checks if it’s one of the provided options and, if not — raises the ValueError with the Expected {value} to be one of {self.options}. message.

burger = BurgerRecipe(buns="1", cheese="1", tomatoes="1", cutlets="1", eggs="1", sauce="mayo")
 # TypeError: Quantity should be integer.

burger = BurgerRecipe(buns=1, cheese=10, tomatoes=1, cutlets=1, eggs=1, sauce="mayo")
 # ValueError: Quantity should not be less than 2 and greater than 3.

burger = BurgerRecipe(buns=2, cheese=1, tomatoes=1, cutlets=1, eggs=1, sauce="mustard") 
# ValueError: Expected mustard to be one of ('ketchup', 'mayo', 'burger').

burger = BurgerRecipe(buns=2, cheese=1, tomatoes=1, cutlets=1, eggs=1, sauce="ketchup")
# burger will be created

Please note: descriptors should be created as class attributes.