BottomSheet ViewAction for Espresso

BottomSheetSetStateAction.kt

class BottomSheetSetStateAction(
  @BottomSheetBehavior.State private val desiredState: Int
) : ViewAction {
 
  override fun getConstraints(): Matcher<View> {
    return Matchers.any(View::class.java)
  }
 
  override fun perform(uiController: UiController, view: View) {
    val bottomSheetBehavior = BottomSheetBehavior.from(view)
    bottomSheetBehavior.state = desiredState
  }
 
  override fun getDescription(): String = "Set BottomSheet to state: $desiredState"
}