Can anyone help me understand the purpose of the `kotlin.test` library? I read that it provides ann...

# getting-started

[Eric Haney]

Can anyone help me understand the purpose of the kotlin.test library?

I read that it provides annotations independent of the testing framework used, but why import this over plain old JUnit?

[Casey Brooks]

kotlin.test is for multiplatform testing while JUnit is JVM-only, though there are other options for multiplatform test frameworks like #kotest

[Eric Haney]

Oh, that makes sense. I have only done stuff on the JVM so I was having trouble imagining a use case for me. Thanks

[Stephan Schröder]

there is another tiny advantage of using kotlin.test:
• it's a native Kotlin lib so it knows about nullability.
If you use kotlin.test's version of assertNotNull the variable will be smartcasted to not-null after the test.