Add test screens for nested navigation

Author: xxfast

decompose-router/src/androidInstrumentedTest/kotlin/io/github/xxfast/decompose/screen/HomeScreen.kt

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+package io.github.xxfast.decompose.screen
+
+import androidx.compose.runtime.Composable
+import com.arkivanov.decompose.ExperimentalDecomposeApi
+import com.arkivanov.decompose.extensions.compose.jetbrains.stack.animation.predictiveBackAnimation
+import com.arkivanov.decompose.extensions.compose.jetbrains.stack.animation.slide
+import com.arkivanov.decompose.extensions.compose.jetbrains.stack.animation.stackAnimation
+import com.arkivanov.decompose.router.stack.pop
+import com.arkivanov.decompose.router.stack.push
+import io.github.xxfast.decompose.LocalComponentContext
+import io.github.xxfast.decompose.router.Router
+import io.github.xxfast.decompose.router.content.RoutedContent
+import io.github.xxfast.decompose.router.rememberRouter
+import io.github.xxfast.decompose.screen.details.DetailScreen
+import io.github.xxfast.decompose.screen.list.ListScreen
+import io.github.xxfast.decompose.screen.nested.NestedScreen
+
+@OptIn(ExperimentalDecomposeApi::class)
+@Composable
+fun HomeScreen() {
+  val router: Router<HomeScreens> =
+    rememberRouter(HomeScreens::class, stack = listOf(HomeScreens.List))
+
+  RoutedContent(
+    router = router,
+    animation = predictiveBackAnimation(
+      animation = stackAnimation(slide()),
+      onBack = { router.pop() },
+      backHandler = LocalComponentContext.current.backHandler
+    )
+  ) { screen ->
+    when (screen) {
+      HomeScreens.List -> ListScreen(
+        onSelect = { count -> router.push(HomeScreens.Details(count)) },
+        onSelectColor = { router.push(HomeScreens.Nested) }
+      )
+
+      HomeScreens.Nested -> NestedScreen(
+        onBack = { router.pop() },
+        onSelect = { count -> router.push(HomeScreens.Details(count)) },
+      )
+
+      is HomeScreens.Details -> DetailScreen(
+        count = screen.number,
+        onBack = { router.pop() }
+      )
+    }
+  }
+}

decompose-router/src/androidInstrumentedTest/kotlin/io/github/xxfast/decompose/screen/HomeStateModels.kt

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+package io.github.xxfast.decompose.screen
+
+import com.arkivanov.essenty.parcelable.Parcelable
+import com.arkivanov.essenty.parcelable.Parcelize
+
+@Parcelize
+sealed class HomeScreens: Parcelable {
+  data object List: HomeScreens()
+  data object Nested: HomeScreens()
+  data class Details(val number: Int): HomeScreens()
+}
+

decompose-router/src/androidInstrumentedTest/kotlin/io/github/xxfast/decompose/screen/TestScreens.kt

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+package io.github.xxfast.decompose.screen
+
+const val LIST_TAG = "list"
+const val TOOLBAR_TAG = "toolbar"
+const val FAVORITE_TAG = "favorite"
+const val BACK_BUTTON_TAG = "back"
+const val TITLE_BAR_TAG = "titleBar"
+const val DETAILS_TAG = "details"