Test.kt

import androidx.compose.animation.*
import androidx.compose.animation.core.*
import androidx.compose.foundation.*
import androidx.compose.foundation.layout.*
import androidx.compose.material.*
import androidx.compose.runtime.*
import androidx.compose.ui.Alignment
import androidx.compose.ui.ExperimentalComposeUiApi
import androidx.compose.ui.Modifier
import androidx.compose.ui.window.*

@ExperimentalAnimationApi
@Composable
fun App() {
    Box(
        modifier = Modifier.fillMaxSize(),
        contentAlignment = Alignment.Center
    ) {
        var value by remember { mutableStateOf("") }
        LocalTest.current.testTitle = value

        TextField(
            value = value,
            onValueChange = { value = it }
        )
    }
}

@ExperimentalAnimationApi
@ExperimentalFoundationApi
fun main() = application {
    CompositionLocalProvider(
        LocalTest provides Test("Test")
    ) {
        Window(onCloseRequest = ::exitApplication, title = LocalTest.current.testTitle) {
            MaterialTheme {
                Surface {
                    App()
                }
            }
        }
    }
}


val LocalTest = compositionLocalOf<Test> {
    noLocalProvidedFor("LocalWindowState")
}

data class Test(
    val testTitle: String
)

fun noLocalProvidedFor(name: String): Nothing {
    error("CompositionLocal $name not present")
}