Builder

Create a domain/models.py file for domain modeling.

Create a Burger class with bread, patty, sauce, and toppings class fields.

The bread, patty, and sauce fields must be str type, toppings field must be list of strings.

bread and patty must be a required field, but sauce and toppings can be optional. It has to be None if it isn't declared.

Give __str__ method to represent the burger. If there isn't sauce or toppings, replace them with "no sauce" or "no toppings" in the __str__ method.

Remember to implement unit tests for the Burger class, use pytest for tests.

Add marshmallow with version as a production dependency in pyproject.toml.

Use as a reference the given link for the right version of Marshmallow: https://marshmallow.readthedocs.io/en/stable/

After adding the marshmallow with the proper version, you have to install it with the make install command.

You have to add version 3.21.3.

Create a service/burger.py file to create abstract and concrete builders.

Create a BurgerBuilder class with 5 abstract methods: bread, meat, sauce, toppings, and build.

The bread method will take 2 arguments: self and bread (as str).

The patty method will take 2 arguments: self and patty (as str).

The sauce method will take 2 arguments: self and sauce (as str).

The toppings method will take 2 arguments: self and toppings (as list(str)).

Raise an error (NotImplementedError) if these methods are used without being overridden.

Remember to implement unit tests for the BurgerBuilder class, use pytest for tests.

Create a CheeseBurgerBuilder class which is inherited from the BurgerBuilder class.

The class must be located in service/burger.py.

Initialize the class by setting _bread, _patty, _sauce and _toppings to None

Implement the BurgerCreatorBuilder class's abstract methods for setting given arguments with default values and return self.

Remember to implement unit tests for the ChesseBurgerBuilder class, use pytest for tests.