TDD Discount System in Kotlin

This project has been build following the Vinted instructions here

The project uses Kotlin to bring a simple discount system with oop + functional programming paradigm into practice.

# For running project on the root directory execute:

$ ./gradlew build
$ ./gradlew run

Design Patterns

1. CoR: the discount system uses chain of responsibility to route shipment and apply discount on each entry.
2. Service Locator: is used as means of providing dependencies for the whole application.

Tests

There are a bunch of tests available that mostly have been written in test driven style

1. Unit Tests: for DAO and Rule classes
2. Approval Testing: for Processor class

# For running tests on the root directory execute:

$ ./gradlew test

Dependencies

As requested no additional dependencies have been added beside Kotlin standard library and testing libs.

1. Mockk: mocking objects while unit testing a class
2. JUnit5: Unit testing
3. approvaltests: approval testing
4. test-logger: to pretty print test outputs run in cli mode.