You have test cases in Java. How do you feel about Kotlin? Have you had experience working with it?

Kotlin is a modern language fully compatible with Java, but more concise and with a number of convenient features such as null safety, extension functions, and coroutines for asynchronous programming. If you have test cases in Java, switching to Kotlin can improve readability and reduce code volume. Personally, I have used Kotlin for writing automated tests, which simplified maintenance and sped up development. For example, in Kotlin, you can write tests using JUnit just like in Java, but with less boilerplate code.