crate-pricing-calculator

Hello and welcome to the CrateDB Cloud Frontend Engineer take-home coding exercise.

You are looking at a very basic bootstrapped React application that mimics a feature of the actual CrateDB Cloud console - the ability to display pricing information for a CrateDB cluster configuration based on the parameters that the user selects.

The user is able to select a cloud region, the name of the product (which is basically a CPU+RAM combo) and the number of nodes that the cluster should be deployed with.

Getting started

$ git clone ...
# If you don't use nvm you can skip this part, but make sure you use node v20.
$ nvm use
$ npm install
$ npm start

The challenge

This simple application has a single component - the DeployPage. The component has the HTML and CSS already written for you. It takes the following parameters:

A list of regions
A list of products
An object containing pricing information for products based on regions.
An onSubmit handler (you won't need to change this)

Your job is twofold

Implement logic to calculate and display the correct price based on the region, product and nodes combination that the user has selected. (hint: the prices passed to the DeployPage component are per-node prices)
Develop a Testing Library test suite to test that the correct prices are being calculated.

Note
Some products have region-specific prices and some do not - in which case they should use the default price for that product.

Acceptance Criteria

The Deploy Page shows the default price for products that do not have a region-specific price
The Deploy Page shows region-specific prices for products that do have them
Changing the number of nodes adjusts the price accordingly (i.e. 3x nodes = 3x the price)
The number of nodes can only be adjusted to the maximum that is defined for that product

Non-functional requirements

Testing Library component tests for the code are implemented (npm test)
The linter is run before the code is submitted (npm run lint -- --fix)

How to submit

Please take a git diff of all your changes and send them to us in a GitHub Gist (private) or by email.

Please do not open pull requests against this repo. Doing so will immediately invalidate your assignment. Sorry.