TypescriptBo

AKA how to over-complicated a simple application just because you can in about ~8hrs.

Based on a similar project: HaiBoO

Concepts and rules are the same, please check the README.md file over there.

Reasons

Low-complexity challenges do not reveal anything.

Business related differences

• Server does not listen on any ports (not started)
• Frontend not started
• Only finished create endpoint, it also lacks feature that should be added: handling already existing production
  • this is missing from every layer
• No properly formatted errors
• No input schema validation / no API blueprint

Technical differences

• Bootstrapped with
  • Typescript, Jest
  • ESLint, prettier
• TDD inside-out, clean architecture
• Strict, defensive OOP
• Not counting missing features, 100% code coverage, maintainable tests
• Questionable:
  • Used a sledgehammer to crack a nut
  • Output printer should use object builder (probably a refactor would have triggered it around GET /productions)
  • Domain entity factory could be extracted
  • Massive test count due to presenting the approach and issues
  • Typesafe validation needed more tests (and still needs a few tbh)
  • Request body transformation could be moved to action (arguably)
  • No dedicated repository. It is difficult to clean the storage (update and already existing entity error would force creating it)
  • No dedicated types on app -> infra layer. Method signatures seemed enough so far.

Setup

docker-compose for dev setup.

$ docker-compose up -d
$ docker-compose exec backend sh
/app/backend # npm install
...
/app/backend # npm t