добавление навигации по приложению

app/build.gradle.kts

@@ -74,6 +74,10 @@ dependencies {
     implementation("androidx.lifecycle:lifecycle-runtime-ktx:2.8.7")
     implementation("androidx.navigation:navigation-compose:2.8.5")
 
+    androidTestImplementation(platform("androidx.compose:compose-bom:2023.05.01"))
+    androidTestImplementation("androidx.compose.ui:ui-test-junit4")
+    androidTestImplementation("androidx.navigation:navigation-testing:2.6.0")
+
     debugImplementation("androidx.compose.ui:ui-test-manifest")
     debugImplementation("androidx.compose.ui:ui-tooling")
 }

app/src/androidTest/java/com/example/lunchtray/test/ComposeRuleExtensions.kt

@@ -0,0 +1,12 @@
+package com.example.lunchtray.test
+
+import androidx.activity.ComponentActivity
+import androidx.annotation.StringRes
+import androidx.compose.ui.test.SemanticsNodeInteraction
+import androidx.compose.ui.test.junit4.AndroidComposeTestRule
+import androidx.compose.ui.test.onNodeWithText
+import androidx.test.ext.junit.rules.ActivityScenarioRule
+
+fun <A : ComponentActivity> AndroidComposeTestRule<ActivityScenarioRule<A>, A>.onNodeWithStringId(
+    @StringRes id: Int
+): SemanticsNodeInteraction = onNodeWithText(activity.getString(id))

app/src/androidTest/java/com/example/lunchtray/test/LunchTrayScreenNavigationTest.kt

@@ -0,0 +1,170 @@
+package com.example.lunchtray.test
+
+import androidx.activity.ComponentActivity
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.test.junit4.createAndroidComposeRule
+import androidx.compose.ui.test.onNodeWithContentDescription
+import androidx.compose.ui.test.onNodeWithText
+import androidx.compose.ui.test.performClick
+import androidx.navigation.compose.ComposeNavigator
+import androidx.navigation.testing.TestNavHostController
+import com.example.lunchtray.LunchTrayApp
+import com.example.lunchtray.LunchTrayScreen
+import com.example.lunchtray.R
+import org.junit.Before
+import org.junit.Rule
+import org.junit.Test
+
+
+class LunchTrayScreenNavigationTest {
+    @get:Rule
+    val composeTestRule = createAndroidComposeRule<ComponentActivity>()
+
+    private lateinit var navController: TestNavHostController
+
+    @Before
+    fun setupLunchTrayNavHost() {
+        composeTestRule.setContent {
+            navController = TestNavHostController(LocalContext.current).apply {
+                navigatorProvider.addNavigator(ComposeNavigator())
+            }
+            LunchTrayApp(navController = navController)
+        }
+    }
+
+    private fun navigateToEntreeMenu() {
+        composeTestRule.onNodeWithStringId(R.string.start_order)
+            .performClick()
+        composeTestRule.onNodeWithText("Cauliflower")
+            .performClick()
+    }
+
+    private fun navigateToSideDishMenu() {
+        navigateToEntreeMenu()
+        performNavigateNext()
+        composeTestRule.onNodeWithText("Summer Salad")
+            .performClick()
+    }
+
+    private fun navigateToAccompanimentMenu() {
+        navigateToSideDishMenu()
+        performNavigateNext()
+        composeTestRule.onNodeWithText("Lunch Roll")
+            .performClick()
+    }
+
+    private fun navigateToCheckout() {
+        navigateToAccompanimentMenu()
+        performNavigateNext()
+    }
+
+    private fun performNavigateUp() {
+        val backText = composeTestRule.activity.getString(R.string.back_button)
+        composeTestRule.onNodeWithContentDescription(backText).performClick()
+    }
+
+    private fun performNavigateNext() {
+        composeTestRule.onNodeWithText("NEXT") // боже...
+            .performClick()
+    }
+
+    private fun performNavigateCancel() {
+        composeTestRule.onNodeWithText("CANCEL") // чему я позволяю быть...
+            .performClick()
+    }
+
+    @Test
+    fun lunchTrayNavHost_verifyStartDestination() {
+        navController.assertCurrentRouteName(LunchTrayScreen.Start.name)
+    }
+
+    @Test
+    fun lunchTrayNavHost_verifyBackNavigationNotShownOnStartOrderScreen() {
+        val backText = composeTestRule.activity.getString(R.string.back_button)
+        composeTestRule.onNodeWithContentDescription(backText).assertDoesNotExist()
+    }
+
+    // Entree Menu
+    @Test
+    fun lunchTrayNavHost_clickStartOrder_navigatesToSelectEntreeMenuScreen() {
+        navigateToEntreeMenu()
+        navController.assertCurrentRouteName(LunchTrayScreen.EntreeMenu.name)
+    }
+
+    @Test
+    fun lunchTrayNavHost_clickBackOnEntreeMenuScreen_navigatesToStartOrderScreen() {
+        navigateToEntreeMenu()
+        performNavigateUp()
+        navController.assertCurrentRouteName(LunchTrayScreen.Start.name)
+    }
+
+    @Test
+    fun lunchTrayNavHost_clickCancelOnEntreeMenuScreen_navigatesToStartOrderScreen() {
+        navigateToEntreeMenu()
+        performNavigateCancel()
+        navController.assertCurrentRouteName(LunchTrayScreen.Start.name)
+    }
+
+    // Side Dish Menu
+    @Test
+    fun lunchTrayNavHost_navigatesToSideDishMenuScreen() {
+        navigateToSideDishMenu()
+        navController.assertCurrentRouteName(LunchTrayScreen.SideDishMenu.name)
+    }
+
+    @Test
+    fun lunchTrayNavHost_clickBackOnSideDishMenuScreen_navigatesToEntreeMenuScreen() {
+        navigateToSideDishMenu()
+        performNavigateUp()
+        navController.assertCurrentRouteName(LunchTrayScreen.EntreeMenu.name)
+    }
+
+    @Test
+    fun lunchTrayNavHost_clickCancelOnSideDishMenuScreen_navigatesToStartOrderScreen() {
+        navigateToSideDishMenu()
+        performNavigateCancel()
+        navController.assertCurrentRouteName(LunchTrayScreen.Start.name)
+    }
+
+    // Accompaniment Menu
+    @Test
+    fun lunchTrayNavHost_navigatesToAccompanimentMenuScreen() {
+        navigateToAccompanimentMenu()
+        navController.assertCurrentRouteName(LunchTrayScreen.AccompanimentMenu.name)
+    }
+
+    @Test
+    fun lunchTrayNavHost_clickBackOnAccompanimentMenuScreen_navigatesToSideDishMenuScreen() {
+        navigateToAccompanimentMenu()
+        performNavigateUp()
+        navController.assertCurrentRouteName(LunchTrayScreen.SideDishMenu.name)
+    }
+
+    @Test
+    fun lunchTrayNavHost_clickCancelOnAccompanimentMenuScreen_navigatesToStartOrderScreen() {
+        navigateToAccompanimentMenu()
+        performNavigateCancel()
+        navController.assertCurrentRouteName(LunchTrayScreen.Start.name)
+    }
+
+    // Checkout
+    @Test
+    fun lunchTrayNavHost_navigatesToCheckout() {
+        navigateToCheckout()
+        navController.assertCurrentRouteName(LunchTrayScreen.Checkout.name)
+    }
+
+    @Test
+    fun lunchTrayNavHost_clickBackOnCheckoutScreen_navigatesToAccompanimentMenuScreen() {
+        navigateToCheckout()
+        performNavigateUp()
+        navController.assertCurrentRouteName(LunchTrayScreen.AccompanimentMenu.name)
+    }
+
+    @Test
+    fun lunchTrayNavHost_clickCancelOnCheckoutScreen_navigatesToStartOrderScreen() {
+        navigateToCheckout()
+        performNavigateCancel()
+        navController.assertCurrentRouteName(LunchTrayScreen.Start.name)
+    }
+}

app/src/androidTest/java/com/example/lunchtray/test/ScreenAssertions.kt

@@ -0,0 +1,8 @@
+package com.example.lunchtray.test
+
+import androidx.navigation.NavController
+import org.junit.Assert.assertEquals
+
+fun NavController.assertCurrentRouteName(expectedRouteName: String) {
+    assertEquals(expectedRouteName, currentBackStackEntry?.destination?.route)
+}