How can I check if a radio button is selected in Jetpack Compose UI tests?

Question

Does anybody know how to check, which radio button is selected in Android UI tests for Jetpack Compose created UI?

I made a radio button group via the attached code, but I don't know how to identify which one is selected by the UI tests.

Column(Modifier.selectableGroup()) {....}

Is there some kind of assertion that returns the selected radio button of the radio button group?

Answer 1

Just set the onClick property of the RadioButton to some callback provide an id to identify what button is selected:

@Composable
fun MyRadioButton(
   onClick: (id) -> Unit
) {
    RadioButton(
        onClick = {
            onClick("myRadioButtonId")
        }
    )
}