Calculate Bill kata

Create a function that takes the price of the bill, the VAT rate and the tip amount and returns the total amount the customer needs to pay, formatted as a currency string.

Step by step

1. Fork this repo to your account

2. Clone down the repo:

       git clone <YOUR_BRANCH_URL>

3. Open the repo in you terminal:

       cd calculate-bill-kata

4. Install the project:

   npm i # shorter version of npm install

5. Run the tests:

   npm test # they will fail to run. We haven't written any code yet.

6. Open VSCode by typing code . or by opening it mannually and navigating to the kata folder/directory

7. In index.js, declare a function called calculateBill. Leave the function body empty for now. Export your function at the bottom of the file with:

   module.exports = calculateBill;

8. Commit and push your work to github

9. Look at test/index.test.js, what is the first test expecting? - can you write it in pseudocode? Which steps would it take? Maybe something like:

    // create a function
    // this function will have to have 3 arguments - amount, vat and tip?
    // this function will have to return a string with a currency sign
    

13. Write the code to pass the first test. Keep a terminal window open and run your test by doing npm test or npm t

14. Things to nose at:

    • Jest: https://jestjs.io/
    • Test driven development (TDD): https://medium.com/javascript-scene/tdd-changed-my-life-5af0ce099f80 AND https://www.freecodecamp.org/news/ an-introduction-to-test-driven-development-c4de6dce5c/
    • Git ignore: https://git-scm.com/docs/gitignore
    • package.json: https://flaviocopes.com/package-json/
    • module.exports and require: https://www.sitepoint.com/understanding-module-exports-exports-node-js/