Add default theme test

gradle/libs.versions.toml

@@ -32,6 +32,7 @@ androidx-lifecycle = "2.6.1"
 androidx-navigation = "2.7.7"
 androidx-test-espresso-core = "3.5.1"
 androidx-test-ext-junit = "1.2.1"
+androidx-test-core = "1.6.1"
 kim = "0.17.7"
 
 dropbox-differ = "0.3.0"
@@ -86,6 +87,7 @@ androidx-navigation-ui-ktx = { module = "androidx.navigation:navigation-ui-ktx",
 androidx-test-espresso-core = { module = "androidx.test.espresso:espresso-core", version.ref = "androidx-test-espresso-core" }
 androidx-test-ext-junit = { module = "androidx.test.ext:junit", version.ref = "androidx-test-ext-junit" }
 androidx-test-ext-junit-ktx = { module = "androidx.test.ext:junit-ktx", version.ref = "androidx-test-ext-junit" }
+androidx-test-core-ktx = { group = "androidx.test", name = "core-ktx", version.ref = "androidx-test-core" }
 kim = { module = "com.ashampoo:kim", version.ref = "kim" }
 
 android-tools-build-gradle = { module = "com.android.tools.build:gradle", version.ref = "agp" }

sample-android/build.gradle

@@ -86,6 +86,7 @@ dependencies {
   androidTestImplementation libs.androidx.test.ext.junit
   testImplementation libs.androidx.compose.material
   testImplementation libs.androidx.test.espresso.core
+  testImplementation libs.androidx.test.core.ktx
   testImplementation libs.robolectric
   testImplementation(libs.kim)
 }

sample-android/src/test/java/com/github/takahirom/roborazzi/sample/DefaultThemeComposeTest.kt

@@ -0,0 +1,61 @@
+package com.github.takahirom.roborazzi.sample
+
+import android.app.Application
+import android.content.pm.ActivityInfo
+import android.os.Bundle
+import androidx.activity.ComponentActivity
+import androidx.compose.material3.Text
+import androidx.compose.ui.test.junit4.createAndroidComposeRule
+import androidx.compose.ui.test.onRoot
+import androidx.test.core.app.ApplicationProvider
+import androidx.test.ext.junit.runners.AndroidJUnit4
+import com.github.takahirom.roborazzi.RoborazziRule
+import com.github.takahirom.roborazzi.captureRoboImage
+import org.junit.Rule
+import org.junit.Test
+import org.junit.rules.TestWatcher
+import org.junit.runner.Description
+import org.junit.runner.RunWith
+import org.robolectric.Shadows
+import org.robolectric.annotation.GraphicsMode
+
+class DefaultThemeActivity: ComponentActivity() {
+  override fun onCreate(savedInstanceState: Bundle?) {
+    setTheme(android.R.style.Theme_Material_Light)
+    super.onCreate(savedInstanceState)
+  }
+}
+
+@RunWith(AndroidJUnit4::class)
+@GraphicsMode(GraphicsMode.Mode.NATIVE)
+class DefaultThemeComposeTest {
+  @get:Rule(order = 1)
+  val addActivityToRobolectricRule = object : TestWatcher() {
+    override fun starting(description: Description?) {
+      super.starting(description)
+      val appContext: Application = ApplicationProvider.getApplicationContext()
+      val activityInfo = ActivityInfo().apply {
+        name = DefaultThemeActivity::class.java.name
+        packageName = appContext.packageName
+      }
+      Shadows.shadowOf(appContext.packageManager).addOrUpdateActivity(activityInfo)
+    }
+  }
+
+  @get:Rule(order = 2)
+  val composeTestRule = createAndroidComposeRule<DefaultThemeActivity>()
+
+  @get:Rule
+  val roborazziRule = RoborazziRule(
+    composeRule = composeTestRule,
+    captureRoot = composeTestRule.onRoot(),
+  )
+
+  @Test
+  fun composable() {
+    composeTestRule.setContent {
+      Text("a\nb\nc\nd\ne\nf\ng\nh\ni\nj\nk\nl\nm\nn\no\np\nq\nr\ns\nt\nu\nv\nw\nx\ny\nz")
+    }
+    composeTestRule.onRoot().captureRoboImage()
+  }
+}