A modern programming language that makes developers happier.

kotlinlang

<https://twitter.com/sdeleuze/status/1096423498325651459>

Yep, Mockk works better than Mockito. I used it in an app with DropWizard and the replacement for Mockito was fairly straightforward. Edit: missing word

what does `freeCompilerArgs = ["-Xjsr305=strict"]` do exactly?

It make Kotlin aware of the null-safety annotation in Spring Framework codebase, making Spring Framework API nullsafe. No NPE at runtime.

Doesn’t kotlin already detect the presence of `@NotNull` annotations?

Yep explicit configuration enable strict checks, like if the Spring Framework code was written in Kotlin

fantastic. I will be adding that to our code base. Does it still use platform types for your own java -&gt; kotlin code?

Yes but you can use Spring Framework `@NonNull`, `@NonNullApi`, `@NonNullFields` and `@Nullable` in your own Java codebase. You may have to include `compileOnly("com.google.code.findbugs:jsr305:3.0.2")` and `testCompileOnly("com.google.code.findbugs:jsr305:3.0.2")` to avoid compilation warnings.

You can even use directly JSR 305 annotations even if I don't recommand it.

We currently use jetbrain’s `@NotNull` and `@Nullable`, which I think are jsr305 compatible, so that won’t be a problem. We just don’t use them everywhere.

I just wasnt sure if strict would cause platform types to function as strictly nullable or notnullable from that point.

also, <@U0BUH9FRD>, why doesn’t the tutorial have kotlin-dsl examples as well as groovy examples? it seems like you’d want to direct people to use the kotlin-dsl as well.

Because of that <https://github.com/spring-io/initializr/issues/334#issuecomment-464107714>

ah! you want initializr to support it before you start writing tutorials in it. Cool! thanks!

Really nice, I learned a lot and rewrote good chunks of my project