Recomposition overlay test snippet for Android app startup article

recomposition-overlay-test.kt

@RunWith(AndroidJUnit4::class)
class MainScreenRecompositionOverlayTest {

    @get:Rule
    val composeRule = createAndroidComposeRule<ComponentActivity>()

    @Test
    fun overlay_expandShowsCounters_and_clearResetsRows() {
        assumeTrue(BuildConfig.DEBUG)

        composeRule.setContent {
            MainScreen(viewModel = MainViewModel())
        }

        composeRule.onNodeWithText("Recompose show").performClick()
        composeRule.onNodeWithText("Clear").performClick()

        composeRule.onAllNodesWithText("TopBar:", substring = true).assertCountEquals(0)
        composeRule.onAllNodesWithText("ConnectivitySection:", substring = true).assertCountEquals(0)
    }
}