Add automated test for keys in scope bugfix

sample/src/androidTest/java/com/sebaslogen/resacaapp/sample/ComposeActivityRecreationTests.kt

@@ -28,14 +28,15 @@ class ComposeActivityRecreationTests : ComposeTestUtils {
 
     @Before
     fun setUp() {
+        showSingleScopedViewModel = null
         scenario = ActivityScenario.launch(
             Intent(ApplicationProvider.getApplicationContext(), ComposeActivity::class.java).apply {
                 putExtra(ComposeActivity.START_DESTINATION, viewModelScopedDestination)
             })
     }
 
     @Test
-    fun whenISwitchFromLightModeToNightMode_thenTheOneAndOnlyScopedViewModelThatSOnlyUsedInLightModeIsGone() {
+    fun whenActivityRecreates_thenTheOneAndOnlyScopedViewModelThatSOnlyUsedInLightModeIsGone() {
         // Given the starting screen with ViewModel scoped that is ONLY shown in light mode
         composeTestRule.waitForIdle()
         // Find the scoped text fields and grab their texts
@@ -54,7 +55,7 @@ class ComposeActivityRecreationTests : ComposeTestUtils {
         onNodeWithTestTag("FakeInjectedViewModel Scoped", assertDisplayed = false).assertDoesNotExist()
         assert(finalAmountOfViewModelsCleared == initialAmountOfViewModelsCleared + 1) {
             "The amount of FakeInjectedViewModel that were cleared after key change ($finalAmountOfViewModelsCleared) " +
-                    "was not higher that the amount before the key change ($initialAmountOfViewModelsCleared)"
+                "was not higher that the amount before the key change ($initialAmountOfViewModelsCleared)"
         }
     }
 }

sample/src/androidTest/java/com/sebaslogen/resacaapp/sample/KeysInScopeActivityRecreationTests.kt

@@ -0,0 +1,59 @@
+package com.sebaslogen.resacaapp.sample
+
+import android.content.Intent
+import androidx.compose.ui.test.assertIsDisplayed
+import androidx.compose.ui.test.assertTextEquals
+import androidx.compose.ui.test.junit4.createEmptyComposeRule
+import androidx.compose.ui.test.onNodeWithTag
+import androidx.compose.ui.test.performScrollToIndex
+import androidx.test.core.app.ActivityScenario
+import androidx.test.core.app.ApplicationProvider
+import androidx.test.ext.junit.runners.AndroidJUnit4
+import androidx.test.filters.LargeTest
+import com.sebaslogen.resaca.COMPOSITION_RESUMED_TIMEOUT_IN_SECONDS
+import com.sebaslogen.resacaapp.sample.ui.main.ComposeActivity
+import com.sebaslogen.resacaapp.sample.ui.main.viewModelScopedWithKeysDestination
+import com.sebaslogen.resacaapp.sample.utils.ComposeTestUtils
+import org.junit.Before
+import org.junit.Rule
+import org.junit.Test
+import org.junit.runner.RunWith
+
+
+@RunWith(AndroidJUnit4::class)
+@LargeTest
+class KeysInScopeActivityRecreationTests : ComposeTestUtils {
+
+    private lateinit var scenario: ActivityScenario<ComposeActivity>
+
+    @get:Rule
+    override val composeTestRule = createEmptyComposeRule()
+
+    @Before
+    fun setUp() {
+        scenario = ActivityScenario.launch(
+            Intent(ApplicationProvider.getApplicationContext(), ComposeActivity::class.java).apply {
+                putExtra(ComposeActivity.START_DESTINATION, viewModelScopedWithKeysDestination)
+            })
+    }
+
+    @Test
+    fun givenAListOfKeysAndALazyListOfScopedViewModelsScrolledToTheMiddle_whenActivityRecreatesAndIScrollBackToTop_thenTheOriginalScopedViewModelIsStillPresent() {
+        // Given the starting screen with ViewModels scoped
+        composeTestRule.waitForIdle()
+        // Find the scoped text fields and grab their texts
+        val initialFakeScopedViewModelText = retrieveTextFromNodeWithTestTag("FakeScopedViewModel 1 Scoped")
+        printComposeUiTreeToLog()
+        // Scroll away from first item
+        composeTestRule.onNodeWithTag("LazyList").performScrollToIndex(50)
+
+        // When we trigger a configuration change by recreating the Activity and scroll back to the top
+        scenario.recreate()
+        printComposeUiTreeToLog()
+        Thread.sleep(COMPOSITION_RESUMED_TIMEOUT_IN_SECONDS * 1000) // Wait for the ViewModel to be cleared
+        composeTestRule.onNodeWithTag("LazyList").performScrollToIndex(0)
+
+        // Then the scoped ViewModel disappears
+        onNodeWithTestTag("FakeScopedViewModel 1 Scoped").assertIsDisplayed().assertTextEquals(initialFakeScopedViewModelText)
+    }
+}

sample/src/androidTest/java/com/sebaslogen/resacaapp/sample/utils/ComposeTestUtils.kt

@@ -1,25 +1,18 @@
 package com.sebaslogen.resacaapp.sample.utils
 
-import android.content.Intent
 import androidx.compose.ui.test.assertIsDisplayed
 import androidx.compose.ui.test.filterToOne
 import androidx.compose.ui.test.hasParent
 import androidx.compose.ui.test.hasTestTag
-import androidx.compose.ui.test.junit4.ComposeContentTestRule
 import androidx.compose.ui.test.junit4.ComposeTestRule
 import androidx.compose.ui.test.onAllNodesWithTag
 import androidx.compose.ui.test.onNodeWithTag
 import androidx.compose.ui.test.onRoot
 import androidx.compose.ui.test.printToLog
 import androidx.compose.ui.text.AnnotatedString
-import androidx.test.core.app.ActivityScenario
-import androidx.test.core.app.ApplicationProvider
-import com.sebaslogen.resacaapp.sample.ui.main.ComposeActivity
-import com.sebaslogen.resacaapp.sample.ui.main.koinViewModelScopedDestination
 import com.sebaslogen.resacaapp.sample.ui.main.showSingleScopedViewModel
 import org.junit.After
 import org.junit.Before
-import org.koin.core.context.stopKoin
 
 interface ComposeTestUtils {
 

sample/src/main/java/com/sebaslogen/resacaapp/sample/ui/main/compose/screens/ComposeScreenWithSingleViewModelScopedWithKeys.kt

@@ -10,6 +10,7 @@ import androidx.compose.material.Text
 import androidx.compose.runtime.Composable
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.testTag
 import androidx.compose.ui.unit.dp
 import androidx.navigation.NavHostController
 import com.sebaslogen.resaca.rememberKeysInScope
@@ -34,7 +35,7 @@ fun ComposeScreenWithSingleViewModelScopedWithKeys(navController: NavHostControl
             text = "The list below contains one ViewModel per row that will stay in memory due to KeysInScope as long as the list and screen are displayed"
         )
         val keys = rememberKeysInScope(inputListOfKeys = listItems)
-        LazyColumn(modifier = Modifier.fillMaxHeight()) {
+        LazyColumn(modifier = Modifier.fillMaxHeight().testTag("LazyList")) {
             items(items = listItems, key = { it.number }) { item ->
                 val fakeScopedVM: FakeScopedViewModel = viewModelScoped(key = item, keyInScopeResolver = keys)
                 DemoComposable(inputObject = fakeScopedVM, objectType = "FakeScopedViewModel $item", scoped = true)