Kotlin property not initialized, but why?

We're writing an internal DSL in Kotlin. Then we use it from our Java code. We see that the objects defined in the DSL are not yet available. Hence the question: Why is the package property not initialized?

Simplified the situation is thus:

val myObject = dsl {
    ...
}

And the DSL:

class Dsl() {
    companion object {
        val stored = mutableListOf<Dsl>()

        fun add(added: Dsl) {
            stored += added
        }
    }
}

fun dsl(init: Dsl.() -> Unit) {
    val dsl = Dsl()
    dsl.init()
    Dsl.add(dsl) // Intentional side effect to simplify DSL definition
}

Using the DSL from Java:

public class ExpectMyObject {
    @Test
    public void testMyObjectLoaded() {
        Assert.assertEquals(1, Dsl.Companion.getStored().size)
    }
}

I expected the package property to be initialized when starting the JVM. But the test fails. What am I overlooking?

You need to refer to something defined in same the file as val myObject, directly or indirectly, from your test. Otherwise its generated class won't get loaded. E.g.

@Test
public void testMyObjectLoaded() {
    your.package.FileNameKt.getMyObject();
    Assert.assertEquals(1, Dsl.Companion.getStored().size);
}