Build: release signing, test options, instrumented tests, fragment dep

app/build.gradle.kts

@@ -5,6 +5,8 @@ plugins {
     id("com.google.devtools.ksp")
 }
 
+val ciKeystore: String? = System.getenv("KEYSTORE_PATH")
+
 android {
     namespace = "io.github.abrarul.modularai"
     compileSdk = 34
@@ -16,6 +18,7 @@ android {
         targetSdk = 34
         versionCode = 1
         versionName = "0.1.0"
+        testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
         ndk { abiFilters += listOf("arm64-v8a") }
         externalNativeBuild {
             cmake {
@@ -29,11 +32,24 @@ android {
         cmake { path = file("src/main/cpp/CMakeLists.txt") }
     }
 
+    signingConfigs {
+        create("release") {
+            if (ciKeystore != null) {
+                storeFile = file(ciKeystore)
+                storePassword = System.getenv("KEYSTORE_PASSWORD")
+                keyAlias = System.getenv("KEY_ALIAS")
+                keyPassword = System.getenv("KEY_PASSWORD")
+            }
+        }
+    }
+
     buildTypes {
         release {
             isMinifyEnabled = true
             isShrinkResources = true
             proguardFiles(getDefaultProguardFile("proguard-android-optimize.txt"), "proguard-rules.pro")
+            // Real key when provided by CI secrets; otherwise the debug key so the APK is still installable.
+            signingConfig = if (ciKeystore != null) signingConfigs.getByName("release") else signingConfigs.getByName("debug")
         }
     }
     compileOptions {
@@ -50,12 +66,14 @@ android {
         // proot must exist as real files in nativeLibraryDir to be executable on Android 10+
         jniLibs.useLegacyPackaging = true
     }
+    testOptions { unitTests.isReturnDefaultValues = true }
 }
 
 dependencies {
     val composeBom = platform("androidx.compose:compose-bom:2024.09.00")
     implementation(composeBom)
     implementation("androidx.activity:activity-compose:1.9.2")
+    implementation("androidx.fragment:fragment-ktx:1.8.3")
     implementation("androidx.compose.material3:material3")
     implementation("androidx.compose.ui:ui")
     implementation("androidx.lifecycle:lifecycle-viewmodel-compose:2.8.6")
@@ -66,4 +84,6 @@ dependencies {
     ksp("androidx.room:room-compiler:2.6.1")
     implementation("org.jetbrains.kotlinx:kotlinx-coroutines-android:1.8.1")
     testImplementation("junit:junit:4.13.2")
+    androidTestImplementation("androidx.test.ext:junit:1.2.1")
+    androidTestImplementation("androidx.test:runner:1.6.2")
 }