Adds dark screenshot tests and fixes background colors in ForYou (#918)

* Adds dark screenshot tests and fixes background colors in ForYou

* 🤖 Updates screenshots

core/testing/src/main/java/com/google/samples/apps/nowinandroid/core/testing/util/ScreenshotHelper.kt

@@ -28,6 +28,7 @@ import com.github.takahirom.roborazzi.RoborazziOptions
 import com.github.takahirom.roborazzi.RoborazziOptions.CompareOptions
 import com.github.takahirom.roborazzi.RoborazziOptions.RecordOptions
 import com.github.takahirom.roborazzi.captureRoboImage
+import com.google.accompanist.testharness.TestHarness
 import org.robolectric.RuntimeEnvironment
 
 val DefaultRoborazziOptions =
@@ -36,16 +37,17 @@ val DefaultRoborazziOptions =
         recordOptions = RecordOptions(resizeScale = 0.5), // Reduce the size of the PNGs
     )
 
+enum class DefaultTestDevices(val description: String, val spec: String) {
+    PHONE("phone", "spec:shape=Normal,width=640,height=360,unit=dp,dpi=480"),
+    FOLDABLE("foldable", "spec:shape=Normal,width=673,height=841,unit=dp,dpi=480"),
+    TABLET("tablet", "spec:shape=Normal,width=1280,height=800,unit=dp,dpi=480"),
+}
 fun <A : ComponentActivity> AndroidComposeTestRule<ActivityScenarioRule<A>, A>.captureMultiDevice(
     screenshotName: String,
     body: @Composable () -> Unit,
 ) {
-    listOf(
-        "phone" to "spec:shape=Normal,width=640,height=360,unit=dp,dpi=480",
-        "foldable" to "spec:shape=Normal,width=673,height=841,unit=dp,dpi=480",
-        "tablet" to "spec:shape=Normal,width=1280,height=800,unit=dp,dpi=480",
-    ).forEach {
-        this.captureForDevice(it.first, it.second, screenshotName, body)
+    DefaultTestDevices.values().forEach {
+        this.captureForDevice(it.description, it.spec, screenshotName, body = body)
     }
 }
 
@@ -53,8 +55,9 @@ fun <A : ComponentActivity> AndroidComposeTestRule<ActivityScenarioRule<A>, A>.c
     deviceName: String,
     deviceSpec: String,
     screenshotName: String,
-    body: @Composable () -> Unit,
     roborazziOptions: RoborazziOptions = DefaultRoborazziOptions,
+    darkMode: Boolean = false,
+    body: @Composable () -> Unit,
 ) {
     val (width, height, dpi) = extractSpecs(deviceSpec)
 
@@ -65,9 +68,11 @@ fun <A : ComponentActivity> AndroidComposeTestRule<ActivityScenarioRule<A>, A>.c
         CompositionLocalProvider(
             LocalInspectionMode provides true,
         ) {
+            TestHarness(darkMode = darkMode) {
                 body()
             }
         }
+    }
     this.onRoot()
         .captureRoboImage(
             "src/test/screenshots/${screenshotName}_$deviceName.png",

feature/foryou/src/test/java/com/google/samples/apps/nowinandroid/feature/foryou/ForYouScreenScreenshotTests.kt

@@ -17,14 +17,19 @@
 package com.google.samples.apps.nowinandroid.feature.foryou
 
 import androidx.activity.ComponentActivity
+import androidx.compose.runtime.Composable
 import androidx.compose.ui.test.junit4.createAndroidComposeRule
+import com.google.samples.apps.nowinandroid.core.designsystem.component.NiaBackground
 import com.google.samples.apps.nowinandroid.core.designsystem.theme.NiaTheme
+import com.google.samples.apps.nowinandroid.core.testing.util.DefaultTestDevices
+import com.google.samples.apps.nowinandroid.core.testing.util.captureForDevice
 import com.google.samples.apps.nowinandroid.core.testing.util.captureMultiDevice
 import com.google.samples.apps.nowinandroid.core.ui.NewsFeedUiState
 import com.google.samples.apps.nowinandroid.core.ui.NewsFeedUiState.Success
 import com.google.samples.apps.nowinandroid.core.ui.UserNewsResourcePreviewParameterProvider
 import com.google.samples.apps.nowinandroid.feature.foryou.OnboardingUiState.Loading
 import com.google.samples.apps.nowinandroid.feature.foryou.OnboardingUiState.NotShown
+import com.google.samples.apps.nowinandroid.feature.foryou.OnboardingUiState.Shown
 import dagger.hilt.android.testing.HiltTestApplication
 import org.junit.Before
 import org.junit.Rule
@@ -60,7 +65,7 @@ class ForYouScreenScreenshotTests {
     }
 
     @Test
-    fun testForYouScreenPopulatedFeed() {
+    fun forYouScreenPopulatedFeed() {
         composeTestRule.captureMultiDevice("ForYouScreenPopulatedFeed") {
             NiaTheme {
                 ForYouScreen(
@@ -82,7 +87,7 @@ class ForYouScreenScreenshotTests {
     }
 
     @Test
-    fun testForYouScreenLoading() {
+    fun forYouScreenLoading() {
         composeTestRule.captureMultiDevice("ForYouScreenLoading") {
             NiaTheme {
                 ForYouScreen(
@@ -102,16 +107,54 @@ class ForYouScreenScreenshotTests {
     }
 
     @Test
-    fun testForYouScreenTopicSelection() {
+    fun forYouScreenTopicSelection() {
         composeTestRule.captureMultiDevice("ForYouScreenTopicSelection") {
+            ForYouScreenTopicSelection()
+        }
+    }
+
+    @Test
+    fun forYouScreenTopicSelection_dark() {
+        composeTestRule.captureForDevice(
+            deviceName = "phone_dark",
+            deviceSpec = DefaultTestDevices.PHONE.spec,
+            screenshotName = "ForYouScreenTopicSelection",
+            darkMode = true,
+        ) {
+            ForYouScreenTopicSelection()
+        }
+    }
+
+    @Test
+    fun forYouScreenPopulatedAndLoading() {
+        composeTestRule.captureMultiDevice("ForYouScreenPopulatedAndLoading") {
+            ForYouScreenPopulatedAndLoading()
+        }
+    }
+
+    @Test
+    fun forYouScreenPopulatedAndLoading_dark() {
+        composeTestRule.captureForDevice(
+            deviceName = "phone_dark",
+            deviceSpec = DefaultTestDevices.PHONE.spec,
+            screenshotName = "ForYouScreenPopulatedAndLoading",
+            darkMode = true,
+        ) {
+            ForYouScreenPopulatedAndLoading()
+        }
+    }
+
+    @Composable
+    private fun ForYouScreenTopicSelection() {
         NiaTheme {
+            NiaBackground {
                 ForYouScreen(
                     isSyncing = false,
-                    onboardingUiState = OnboardingUiState.Shown(
+                    onboardingUiState = Shown(
                         topics = userNewsResources.flatMap { news -> news.followableTopics }
                             .distinctBy { it.topic.id },
                     ),
-                    feedState = NewsFeedUiState.Success(
+                    feedState = Success(
                         feed = userNewsResources,
                     ),
                     onTopicCheckedChanged = { _, _ -> },
@@ -126,14 +169,15 @@ class ForYouScreenScreenshotTests {
         }
     }
 
-    @Test
-    fun testForYouScreenPopulatedAndLoading() {
-        composeTestRule.captureMultiDevice("ForYouScreenPopulatedAndLoading") {
+    @Composable
+    private fun ForYouScreenPopulatedAndLoading() {
+        NiaTheme {
+            NiaBackground {
                 NiaTheme {
                     ForYouScreen(
                         isSyncing = true,
-                    onboardingUiState = OnboardingUiState.Loading,
-                    feedState = NewsFeedUiState.Success(
+                        onboardingUiState = Loading,
+                        feedState = Success(
                             feed = userNewsResources,
                         ),
                         onTopicCheckedChanged = { _, _ -> },
@@ -147,4 +191,5 @@ class ForYouScreenScreenshotTests {
                 }
             }
         }
+    }
 }