Add a Roborazzi Screenshot test for Tutorial's Welcome page (#882)

reference-apps/tutorial/app/build.gradle.kts

@@ -66,6 +66,10 @@ android {
     // Deprecated in AGP 8+, replaced by `packaging`
     @Suppress("DEPRECATION")
     packagingOptions { resources { excludes.add("/META-INF/{AL2.0,LGPL2.1}") } }
+
+    testOptions.unitTests {
+        isIncludeAndroidResources = true // For Roborazzi
+    }
 }
 
 dependencies {
@@ -78,9 +82,17 @@ dependencies {
     implementation(libs.androidx.compose.ui.tooling.preview)
     implementation(libs.material)
 
-    testImplementation(libs.junit)
     debugImplementation(libs.androidx.compose.ui.tooling)
     debugImplementation(libs.androidx.compose.ui.test.manifest)
+
+    testImplementation(libs.designcompose.test)
+    testImplementation(libs.robolectric)
+    testImplementation(libs.roborazzi)
+    testImplementation(libs.roborazzi.compose)
+    testImplementation(libs.roborazzi.junit)
+    testImplementation(libs.androidx.test.espresso.core)
+    testImplementation(libs.androidx.compose.ui.test.junit4)
+
     androidTestImplementation(platform(libs.androidx.compose.bom))
     androidTestImplementation(libs.junit)
     androidTestImplementation(libs.androidx.compose.ui.test.junit4)

reference-apps/tutorial/app/src/testDebug/kotlin/com/android/designcompose/tutorial/CheckStartupPage.kt

@@ -0,0 +1,62 @@
+/*
+ * Copyright 2024 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.designcompose.tutorial
+
+import androidx.compose.ui.test.junit4.createComposeRule
+import androidx.compose.ui.test.onNodeWithText
+import androidx.compose.ui.test.onRoot
+import androidx.test.ext.junit.runners.AndroidJUnit4
+import com.github.takahirom.roborazzi.RobolectricDeviceQualifiers
+import com.github.takahirom.roborazzi.RoborazziRule
+import org.junit.Rule
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.robolectric.annotation.Config
+import org.robolectric.annotation.GraphicsMode
+
+@RunWith(AndroidJUnit4::class)
+@Config(qualifiers = RobolectricDeviceQualifiers.MediumTablet, sdk = [34])
+@GraphicsMode(GraphicsMode.Mode.NATIVE)
+class CheckStartupPage {
+    @get:Rule val composeTestRule = createComposeRule()
+
+    @get:Rule
+    val roborazziRule =
+        RoborazziRule(
+            composeRule = composeTestRule,
+            // Specify the node to capture for the last image
+            captureRoot = composeTestRule.onRoot(),
+            options =
+                RoborazziRule.Options(
+                    outputDirectoryPath = "src/testDebug/roborazzi",
+                    // Always capture the last image of the test
+                    captureType = RoborazziRule.CaptureType.LastImage()
+                )
+        )
+
+    @Test
+    fun testStartupPage() {
+        with(composeTestRule) {
+            setContent { TutorialMain() }
+            onNodeWithText(
+                    "Congratulations on running the Automotive Design for Compose Tutorial app!",
+                    substring = true
+                )
+                .assertExists()
+        }
+    }
+}