Created instrumented tests for the FavoriteScreen composables.

Author: NickKoepr

app/src/androidTest/java/nl/nickkoepr/bored/dummy/repositories/DummyRepositories.kt

@@ -1,7 +1,9 @@
 package nl.nickkoepr.bored.dummy.repositories
 
 import kotlinx.coroutines.flow.Flow
-import kotlinx.coroutines.flow.flowOf
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.map
+import kotlinx.coroutines.flow.update
 import nl.nickkoepr.bored.data.database.repository.DatabaseRepository
 import nl.nickkoepr.bored.data.network.repository.NetworkRepository
 import nl.nickkoepr.bored.dummy.DummyActivity
@@ -21,20 +23,27 @@ class DummyNetworkRepository : NetworkRepository {
 }
 
 class DummyDatabaseRepository : DatabaseRepository {
-    private val dummyDataList = mutableListOf<Activity>()
+    private val dummyDataListState = MutableStateFlow<List<Activity>>(emptyList())
+
     override suspend fun addFavorite(activity: Activity) {
-        dummyDataList.add(activity)
+        dummyDataListState.update { state ->
+            state + activity
+        }
     }
 
     override suspend fun removeFavorite(activity: Activity) {
-        dummyDataList.remove(activity)
+        dummyDataListState.update { state ->
+            state.filterNot { it == activity }
+        }
     }
 
     override fun getFavorites(): Flow<List<Activity>> {
-        return flowOf(dummyDataList)
+        return dummyDataListState
     }
 
     override fun getActivityByKey(key: String): Flow<Activity?> {
-        return flowOf(dummyDataList.find { it.key == key })
+        return dummyDataListState.map { activityList ->
+            activityList.find { activity -> activity.key == key }
+        }
     }
 }

app/src/androidTest/java/nl/nickkoepr/bored/favoritesScreen/FavoriteScreenTest.kt

@@ -0,0 +1,84 @@
+package nl.nickkoepr.bored.favoritesScreen
+
+/**
+ * Tests created for testing the FavoriteScreen composables.
+ */
+import android.content.Context
+import androidx.compose.ui.test.assertIsDisplayed
+import androidx.compose.ui.test.junit4.createComposeRule
+import androidx.compose.ui.test.onNodeWithTag
+import androidx.compose.ui.test.onNodeWithText
+import androidx.compose.ui.test.performClick
+import androidx.test.core.app.ApplicationProvider
+import kotlinx.coroutines.ExperimentalCoroutinesApi
+import kotlinx.coroutines.test.runTest
+import nl.nickkoepr.bored.data.database.repository.DatabaseRepository
+import nl.nickkoepr.bored.dummy.DummyActivity
+import nl.nickkoepr.bored.dummy.repositories.DummyDatabaseRepository
+import nl.nickkoepr.bored.ui.screens.favorites.FavoritesScreen
+import nl.nickkoepr.bored.ui.screens.favorites.FavoritesViewModel
+import nl.nickkoepr.bored.utils.toPercent
+import org.junit.Before
+import org.junit.Rule
+import org.junit.Test
+import nl.nickkoepr.bored.R
+
+class FavoriteScreenTest {
+    @get:Rule
+    val composeTestRule = createComposeRule()
+    private lateinit var dummyDatabase: DatabaseRepository
+
+    @Before
+    fun initScreen() {
+        dummyDatabase = DummyDatabaseRepository()
+        composeTestRule.setContent {
+            FavoritesScreen({}, viewModel = FavoritesViewModel(dummyDatabase))
+        }
+    }
+
+    @OptIn(ExperimentalCoroutinesApi::class)
+    @Test
+    fun favoriteScreen_favoriteCard_isCardDisplayedWithInformation() = runTest {
+        val activity = DummyActivity.activity1
+        val type = ApplicationProvider.getApplicationContext<Context>()
+            .getString(activity.type.label)
+        dummyDatabase.addFavorite(activity)
+
+        // The [icon] at the end of the activity is a placeholder for the favorite star icon.
+        composeTestRule.onNodeWithText("${activity.activity}[icon]").assertIsDisplayed()
+
+        composeTestRule.onNodeWithText(activity.price.toPercent()).assertIsDisplayed()
+        composeTestRule.onNodeWithText(type).assertIsDisplayed()
+        composeTestRule.onNodeWithText(activity.accessibility.toPercent()).assertIsDisplayed()
+        composeTestRule.onNodeWithText(activity.participants.toString()).assertIsDisplayed()
+    }
+
+    @OptIn(ExperimentalCoroutinesApi::class)
+    @Test
+    fun favoriteScreen_favoriteCard_expandedCardInformation() = runTest {
+        val context = ApplicationProvider.getApplicationContext<Context>()
+        val activity = DummyActivity.activity1
+        dummyDatabase.addFavorite(activity)
+
+        composeTestRule.onNodeWithText("${activity.activity}[icon]").performClick()
+        // Those four strings are displayed when the activity favorite card is expanded. Otherwise
+        // only the stats and icons are displayed.
+        composeTestRule.onNodeWithText(context.getString(R.string.accessibility)).assertIsDisplayed()
+        composeTestRule.onNodeWithText(context.getString(R.string.participants)).assertIsDisplayed()
+        composeTestRule.onNodeWithText(context.getString(R.string.price)).assertIsDisplayed()
+        composeTestRule.onNodeWithText(context.getString(R.string.type)).assertIsDisplayed()
+    }
+
+    @OptIn(ExperimentalCoroutinesApi::class)
+    @Test
+    fun favoriteScreen_favoriteCard_removeCardWhenPressingOnStar() = runTest {
+        val context = ApplicationProvider.getApplicationContext<Context>()
+        val activity = DummyActivity.activity1
+        dummyDatabase.addFavorite(activity)
+
+        composeTestRule.onNodeWithTag("favoriteStarIconButton").performClick()
+        // Check if the No favorites text is displayed on the screen.
+        // When this text is displayed, then there are no more activities on screen.
+        composeTestRule.onNodeWithText(context.getString(R.string.no_favorites)).assertIsDisplayed()
+    }
+}

app/src/main/java/nl/nickkoepr/bored/ui/screens/favorites/FavoritesScreen.kt

@@ -251,7 +251,7 @@ fun NoFavoriteMessage(modifier: Modifier = Modifier) {
             tint = MaterialTheme.colorScheme.primary
         )
         Text(
-            text = "No favorites",
+            text = stringResource(id = R.string.no_favorites),
             style = MaterialTheme.typography.displaySmall,
             fontSize = 30.sp,
             color = MaterialTheme.colorScheme.onSurfaceVariant

app/src/main/res/values/strings.xml

@@ -7,6 +7,7 @@
     <string name="about">about</string>
     <string name="close">close</string>
     <string name="no_activity_found">no activity found</string>
+    <string name="no_favorites">No favorites</string>
     <string name="change_filters">change your filters to find activities again!</string>
 
     <string name="home">Home</string>