Add Compose Preview test and fix issues

2 files changed, 26 insertions, 11 deletions

diff --git a/android/test/arch/build.gradle.kts b/android/test/arch/build.gradle.kts
index 0a28fd2fab..dff039f0e2 100644
--- a/android/test/arch/build.gradle.kts
+++ b/android/test/arch/build.gradle.kts
@@ -7,18 +7,14 @@ android {
     namespace = "net.mullvad.mullvadvpn.test.arch"
     compileSdk = Versions.Android.compileSdkVersion
 
-    defaultConfig {
-        minSdk = Versions.Android.minSdkVersion
-    }
+    defaultConfig { minSdk = Versions.Android.minSdkVersion }
 
     compileOptions {
         sourceCompatibility = JavaVersion.VERSION_17
         targetCompatibility = JavaVersion.VERSION_17
     }
 
-    kotlinOptions {
-        jvmTarget = Versions.jvmTarget
-    }
+    kotlinOptions { jvmTarget = Versions.jvmTarget }
 
     lint {
         lintConfig = file("${rootProject.projectDir}/config/lint.xml")
@@ -28,14 +24,11 @@ android {
 }
 
 androidComponents {
-    beforeVariants { variantBuilder ->
-        variantBuilder.apply {
-            enable = name != "release"
-        }
-    }
+    beforeVariants { variantBuilder -> variantBuilder.apply { enable = name != "release" } }
 }
 
 dependencies {
+    testImplementation(Dependencies.Compose.uiToolingAndroidPreview)
     testImplementation(Dependencies.AndroidX.appcompat)
     testImplementation(Dependencies.junit)
     testImplementation(Dependencies.konsist)
diff --git a/android/test/arch/src/test/kotlin/net/mullvad/mullvadvpn/test/arch/compose/ComposePreviewTests.kt b/android/test/arch/src/test/kotlin/net/mullvad/mullvadvpn/test/arch/compose/ComposePreviewTests.kt
new file mode 100644
index 0000000000..64b221d0c0
--- /dev/null
+++ b/android/test/arch/src/test/kotlin/net/mullvad/mullvadvpn/test/arch/compose/ComposePreviewTests.kt
@@ -0,0 +1,22 @@
+package net.mullvad.mullvadvpn.test.arch.compose
+
+import androidx.compose.ui.tooling.preview.Preview
+import com.lemonappdev.konsist.api.Konsist
+import com.lemonappdev.konsist.api.ext.list.withAllAnnotationsOf
+import com.lemonappdev.konsist.api.verify.assert
+import org.junit.Test
+
+class ComposePreviewTests {
+    @Test
+    fun `all preview functions are private`() {
+        allPreviewFunctions().assert { it.hasPrivateModifier }
+    }
+
+    @Test
+    fun `all preview functions are prefixed with Preview`() {
+        allPreviewFunctions().assert { it.name.startsWith("Preview") }
+    }
+
+    private fun allPreviewFunctions() =
+        Konsist.scopeFromProduction().functions().withAllAnnotationsOf(Preview::class)
+}