kotlin.test

library provides annotations to mark test functions and a set of utility functions for performing assertions in tests, independently of the test framework being used.

emphasis on “library” it’s not part of kotlin per se so it should be used through your usual build tool cf. https://mvnrepository.com/artifact/org.jetbrains.kotlin/kotlin-test/1.3.61

thank you! 😀

Yeah I think there are a lot of issues around configuration that confuse people because the main IDE for Kotlin is made by the people who invented Kotlin and it scaffolds all this stuff for you. It’s like React devs in JS/TS who don’t understand how Gulp or Webpack or whatever works because React has an official scaffolding tool that sets everything up for you. Then when you have a build/transpile/etc. issue, it’s perceived as a React issue.