In this assignment, you will create a character creation system for a fantasy video game using Node.js$$s built$-$in stream module. You will use a Duplex stream to process character creation data and output a formatted character description. You will also write unit tests for your code using Jest, following TDD principles:

Instructions:

$1.$ Create a new project folder named fantasy$-$character$-$creation$-$stream.

$2.$ Inside the project folder, create the following structure: fantasy$-$character$-$creation$-$stream src character$-$creator.js test character$-$creator.spec.js package.json

$3.$ In your package.json file, add a test script. Remember to install Jest as a dev dependency.

$4.$ In the character$-$creator.js file create a CharacterCreator class that extends the Duplex stream class from Node.js$$s built$-$in stream module. The class should process character creation data and output a formatted description.

$5.$ The CharacterCreator class should take data about the character$$s class $($Warrior$,$ Mage, Route$),$ gender $($Male$,$ Female, Other$),$ and a fun fact about the character. $160$

$6.$ Write three$-$unit tests for your CharacterCreator class in the charactercreator.spec.js file. Each test should cover a diKerent aspect about the class$$s functionality:

a$.$ Test $1$: The CharacterCreator processes data correctly when written to$.$

b$.$ Test $2$: The CharacterCreator emits an $$error$$ event when an empty string is written to it$.$

c$.$ Test $3$: The CharacterCreator transforms the data correctly when written to$.$

$7.$ Follow TDD principles: write a failing test, make it pass, then refactor. Repeat this process for each unit test.

Hints:

$$ Use the push method in your Duplex stream to output data.

$$ Remember to call callback in your $\_$write method.

$$ Use the done function in your Jest tests to handle asynchronous code.

$$ Refer to the MoviesStream provided in this chapter for guidance.