IdlingResource which waits for a BottomSheet to enter a particular state.

BottomSheetStateResource.kt

class BottomSheetStateResource(
 bottomSheetBehavior: BottomSheetBehavior<View>,
 @BottomSheetBehavior.State private val desiredState: Int
) : BottomSheetResource(bottomSheetBehavior) {
 
 override fun getName(): String {
   return "BottomSheet awaiting state: $desiredState"
 }
 
 override fun isDesiredState(@BottomSheetBehavior.State state: Int): Boolean {
   return state == desiredState
 }
}