Glencore Tech Assessment

View solution online in a serverless function: https://glencore-assessment-c7mif9gc3.now.sh/

Find the code here: https://github.com/Furizaa/tect-assessment-glencore

Notes about the solution:

• Reducers and Actions have full type coverage.

• I try to challange myself with this code assessments and to learn new things. Thats why I opted for Next.js instaed of create-react-app or a custom Webpack/Babel config which I'm more familliar with. For the same reason I decided to not use Redux or Mobx, but instead tried to manage state with the new React Hooks and the new Context API.

• There is no global consistency validation. Instead the UI prevents the user from creating an invalid state.

The following points are corners I had to cut due to time constraints:

• I only added reducer tests. These are the most complex business logic in the code. If I had the time to test components I would have used enzyme. Also there are no integration tests, browser tests or visual tests as this would blew the assessment out of proportion.
• The provided solution should generally works on mobile devices but it's not optimized for them.
• There is no user input normalization.
• There is no code lint tool setup. I've used Prettier during development.
• Some @ts-ignore scattered around the code. This is only done to circumvent a faulty definition file in the rebass library.
• A11y was not a major factor.
• A lot of some minor quality improvements could be made.