Docker has changed the world of IT (and is still changing it). It's not just about infra or ops. It really is devOps. And in devOps, there's dev.
Developers have everything to gain from using Docker, but sometimes it can seem complicated or cumbersome. That's where TestContainers come in. A technology available for a large number of development frameworks (Java/Kotlin, Python, NodeJs, .Net, Ruby...) . It will change the way you think about unit and integration tests.
As I will show you working code and tests, this will be a good opportunity to return to the true meaning of some magic terms and to talk about the famous test pyramid, once again.

slides are here https://docs.google.com/presentation/d/1TMiNdJxUmbzkcGPHCEuW9_qKHI4uglVcMzFR0Ic8pTc/edit?usp=drive_link

This session comes with a hands on lab , using Kotlin, and presenting a concrete example of testing the Hexagonal Architecture with and without Test Containers
Code is here:
https://github.com/Guillaume-Music-Action/Tester_Hexagone_Parcmetre
https://github.com/music-action/how-to-test-the-hexagon-kotlin-2024