Configuring a local instance of a database service, the DB schema and java-config could kill the last desire to work. Because setting up all staff related to a database can take a lot of time, the local H2 database instance can help to quickly create a prototype of an app…
Testcontainers library is a perfect tool for providing Docker containers with external components from an integration test class level. With this tool, we are able to check how our codebase behaves with a real-life external system. But running an instance of a container for every test class sounds like poison…
Sometimes when I needed to write integration tests, I was forced to mock an external system or service from the java tests level. It wasn’t enjoyable and what is more, it required spending many hours on creating a codebase which tried to behave like a real system. It is dangerous…
Sometimes it is needed to find duplicates in a collection. I met this challenge a couple of days ago and my first thought was “Ha! What a trivial task!”. But then I realised that we could use a wide range of tools in Java to reach a hill of success…