introduce paparazzi for ui unit testing

gradle/libs.versions.toml

@@ -34,6 +34,9 @@ tripletPlugin = "3.8.1" # 3.8.3
 # https://github.com/pinterest/ktlint
 ktlint = "0.48.2" # 0.49.1
 
+# https://github.com/cashapp/paparazzi/
+paparazzi = "1.3.1"
+
 
 
 
@@ -230,3 +233,4 @@ kover = { id = "org.jetbrains.kotlinx.kover", version.ref = "kover" }
 spotless = { id = "com.diffplug.spotless", version.ref = "spotless" }
 grgit = { id = "org.ajoberstar.grgit", version.ref = "grgit" }
 triplet = { id = "com.github.triplet.play", version.ref = "tripletPlugin" }
+paparazzi = { id = "app.cash.paparazzi", version.ref = "paparazzi" }

ui/settings/build.gradle.kts

@@ -5,6 +5,7 @@ plugins {
     alias(libs.plugins.detekt)
     alias(libs.plugins.kover)
     alias(libs.plugins.spotless)
+    alias(libs.plugins.paparazzi)
 }
 
 spotless {

ui/settings/src/test/kotlin/photos/network/ui/settings/composable/SettingsHeader.kt

@@ -0,0 +1,95 @@
+package photos.network.ui.settings.composable
+
+import app.cash.paparazzi.DeviceConfig
+import app.cash.paparazzi.InstantAnimationsRule
+import app.cash.paparazzi.Paparazzi
+import org.junit.Rule
+import org.junit.Test
+import com.android.ide.common.rendering.api.SessionParams
+import photos.network.api.ServerStatus
+import photos.network.ui.common.theme.AppTheme
+
+class SettingsHeader {
+    @get:Rule
+    val instantAnimationsRule = InstantAnimationsRule()
+
+    @get:Rule
+    val paparazzi = Paparazzi(
+        deviceConfig = DeviceConfig.PIXEL_5,
+        showSystemUi = false,
+        supportsRtl = true,
+        renderingMode = SessionParams.RenderingMode.SHRINK
+    )
+
+    @Test
+    fun unauthorized_dark() {
+        paparazzi.snapshot {
+            AppTheme(useDarkTheme = true) {
+                SettingsHeader(serverStatus = ServerStatus.UNAUTHORIZED)
+            }
+        }
+    }
+
+    @Test
+    fun unauthorized_light() {
+        paparazzi.snapshot {
+            AppTheme(useDarkTheme = false) {
+                SettingsHeader(serverStatus = ServerStatus.UNAUTHORIZED)
+            }
+        }
+    }
+
+    @Test
+    fun unavailable_dark() {
+        paparazzi.snapshot {
+            AppTheme(useDarkTheme = true) {
+                SettingsHeader(serverStatus = ServerStatus.UNAVAILABLE)
+            }
+        }
+    }
+
+    @Test
+    fun unavailable_light() {
+        paparazzi.snapshot {
+            AppTheme(useDarkTheme = false) {
+                SettingsHeader(serverStatus = ServerStatus.UNAVAILABLE)
+            }
+        }
+    }
+
+    @Test
+    fun progress_dark() {
+        paparazzi.snapshot {
+            AppTheme(useDarkTheme = true) {
+                SettingsHeader(serverStatus = ServerStatus.PROGRESS)
+            }
+        }
+    }
+
+    @Test
+    fun progress_light() {
+        paparazzi.snapshot {
+            AppTheme(useDarkTheme = false) {
+                SettingsHeader(serverStatus = ServerStatus.PROGRESS)
+            }
+        }
+    }
+
+    @Test
+    fun available_dark() {
+        paparazzi.snapshot {
+            AppTheme(useDarkTheme = true) {
+                SettingsHeader(serverStatus = ServerStatus.AVAILABLE)
+            }
+        }
+    }
+
+    @Test
+    fun available_light() {
+        paparazzi.snapshot {
+            AppTheme(useDarkTheme = false) {
+                SettingsHeader(serverStatus = ServerStatus.AVAILABLE)
+            }
+        }
+    }
+}