This is a (somewhat) completed solution for a provided code challenge of a Capital Gains tax calculator.
This is a Scala application, using Cats Effect effect system, alongside with some other related libraries to handle relevant parts of functionality, namely Circe for JSON and FS2 for input manipulation.
To comply with the generic approach of this ecosystem, I separated the application itself that runs with a side-effects (input/output) and the logic behind calculations. Thus integration tests are not included, since there is no point to test 3d-party library for correctness.
If you don't have a sbt tool in your system
Follow any instruction to install it onto you system:
- with Coursier -
cs install sbt - with SDKMan -
sdk install sbt - with Homebrew -
brew install sbt - or any other way suitable to you
sbt test- runs unit tests packed with the solutionsbt assembly- builds an executable jar in<working directory>/target/scala.../directoryjava -jar <path-to-jar>/nubankchallenge.jar < <input file>- runs the application against an input file provided by you
I'd like to note that I left last (#9) test case failing, since at this point this challenge became an exercise in a business logic reverse engineering and just a sink for the time I don't have. Thus that challenge isn't 100% done from that point of view, obviously. Besides that, this project contains most of the bits and bolts that are expected to be found in a production-ready Scala (!) application, even if not all of them are finalized to be work together.