Petikoch

import org.junit.jupiter.api.*
import org.junit.jupiter.api.Assertions.assertEquals

class JUnit5JupiterBasedKotlinDslSketch {

    @Test
    fun goodOldWorld() {
        assertEquals(2, 1 + 1)
    }

Petikoch

// exmple from https://proandroiddev.com/writing-kotlin-dsls-with-nested-builder-pattern-66452476d5ef
// slightly modified

data class Business(
   val name: String,
   val address: Address,
   val employees: List<Employee>
) {
   @BusinessDsl
   class BusinessBuilder {

Petikoch

import io.reactivex.Flowable;
import org.apache.commons.lang3.StringUtils;

import java.util.concurrent.TimeUnit;

public class RxJavaFizzBuzz {

    public static void main(String[] args) throws InterruptedException {
        Flowable<String> fizzes = Flowable.just("", "", "fizz").repeat();
        Flowable<String> buzzes = Flowable.just("", "", "", "", "buzz").repeat();