feat(ci): add kover for test coverage reporting (#3041)

Signed-off-by: James Rich <2199651+jamesarich@users.noreply.github.com>

.github/workflows/reusable-android-build.yml

@@ -9,6 +9,8 @@ on:
         required: false
       DATADOG_CLIENT_TOKEN:
         required: false
+      CODECOV_TOKEN:
+        required: false
     inputs:
       upload_artifacts:
         description: 'Whether to upload build and Detekt artifacts'
@@ -67,9 +69,17 @@ jobs:
           echo "datadogApplicationId=$DATADOG_APPLICATION_ID" >> ./secrets.properties
           echo "datadogClientToken=$DATADOG_CLIENT_TOKEN" >> ./secrets.properties
       - name: Run Spotless, Detekt, Build, Lint, and Local Tests
-        run: ./gradlew :app:spotlessCheck :app:detekt :app:lintFdroidDebug :app:lintGoogleDebug :app:assembleDebug :app:testFdroidDebug :app:testGoogleDebug --configuration-cache --scan
+        run: ./gradlew :app:spotlessCheck :app:detekt :app:lintFdroidDebug :app:lintGoogleDebug :app:assembleDebug koverXmlReport --configuration-cache --scan
         env:
           VERSION_CODE: ${{ env.VERSION_CODE }}
+
+      - name: Upload coverage reports to Codecov
+        uses: codecov/codecov-action@v4
+        with:
+          token: ${{ secrets.CODECOV_TOKEN }}
+          slug: meshtastic/Meshtastic-Android
+          files: app/build/reports/kover/xml/report.xml
+
       - name: Upload F-Droid debug artifact
         if: ${{ inputs.upload_artifacts }}
         uses: actions/upload-artifact@v4

README.md

@@ -5,6 +5,7 @@
 
 ![GitHub all releases](https://img.shields.io/github/downloads/meshtastic/meshtastic-android/total)
 [![Android CI](https://github.com/meshtastic/Meshtastic-Android/actions/workflows/pull-request.yml/badge.svg?branch=main)](https://github.com/meshtastic/Meshtastic-Android/actions/workflows/pull-request.yml)
+[![codecov](https://codecov.io/gh/meshtastic/Meshtastic-Android/graph/badge.svg)](https://codecov.io/gh/meshtastic/Meshtastic-Android)
 [![Crowdin](https://badges.crowdin.net/e/f440f1a5e094a5858dd86deb1adfe83d/localized.svg)](https://crowdin.meshtastic.org/android)
 [![CLA assistant](https://cla-assistant.io/readme/badge/meshtastic/Meshtastic-Android)](https://cla-assistant.io/meshtastic/Meshtastic-Android)
 [![Fiscal Contributors](https://opencollective.com/meshtastic/tiers/badge.svg?label=Fiscal%20Contributors&color=deeppink)](https://opencollective.com/meshtastic/)

app/build.gradle.kts

@@ -34,6 +34,7 @@ plugins {
     alias(libs.plugins.secrets)
     alias(libs.plugins.spotless)
     alias(libs.plugins.dokka)
+    alias(libs.plugins.kover)
 }
 
 val keystorePropertiesFile = rootProject.file("keystore.properties")
@@ -62,12 +63,18 @@ android {
         minSdk = Configs.MIN_SDK
         targetSdk = Configs.TARGET_SDK
         // Prioritize injected props, then ENV, then fallback to git commit count
-        versionCode = (project.findProperty("android.injected.version.code")?.toString()?.toInt()
+        versionCode =
+            (
+                project.findProperty("android.injected.version.code")?.toString()?.toInt()
                     ?: System.getenv("VERSION_CODE")?.toInt()
-            ?: gitVersionProvider.get().toInt())
+                    ?: gitVersionProvider.get().toInt()
-        versionName = (project.findProperty("android.injected.version.name")?.toString()
+                )
+        versionName =
+            (
+                project.findProperty("android.injected.version.name")?.toString()
                     ?: System.getenv("VERSION_NAME")
-            ?: Configs.VERSION_NAME_BASE)
+                    ?: Configs.VERSION_NAME_BASE
+                )
         testInstrumentationRunner = "com.geeksville.mesh.TestRunner"
         buildConfigField("String", "MIN_FW_VERSION", "\"${Configs.MIN_FW_VERSION}\"")
         buildConfigField("String", "ABS_MIN_FW_VERSION", "\"${Configs.ABS_MIN_FW_VERSION}\"")

build.gradle.kts

@@ -31,6 +31,44 @@ plugins {
     alias(libs.plugins.protobuf) apply false
     alias(libs.plugins.secrets) apply false
     alias(libs.plugins.dokka) apply false
+    alias(libs.plugins.kover)
+}
+
+kover {
+    reports {
+        total {
+            filters {
+                excludes {
+                    // Exclude generated classes
+                    classes("*_Impl")
+                    classes("*Binding")
+                    classes("*Factory")
+                    classes("*.BuildConfig")
+                    classes("*.R")
+                    classes("*.R$*")
+
+                    // Exclude UI components
+                    annotatedBy("*Preview")
+
+                    // Exclude declarations
+                    annotatedBy(
+                        "*.HiltAndroidApp",
+                        "*.AndroidEntryPoint",
+                        "*.Module",
+                        "*.Provides",
+                        "*.Binds",
+                        "*.Composable",
+                    )
+                }
+            }
+        }
+    }
+}
+
+dependencies {
+    kover(project(":app"))
+    kover(project(":network"))
+    kover(project(":mesh_service_example"))
 }
 
 tasks.register<Delete>("clean") {

gradle/libs.versions.toml

@@ -31,6 +31,7 @@ kotlin = "2.2.20"
 kotlinx-collections-immutable = "0.4.0"
 kotlinx-coroutines-android = "1.10.2"
 kotlinx-serialization-json = "1.9.0"
+kover = "0.9.1"
 lifecycle = "2.9.3"
 location-services = "21.3.0"
 maps-compose = "6.10.0"
@@ -229,6 +230,7 @@ kotlin-android = { id = "org.jetbrains.kotlin.android", version.ref = "kotlin" }
 kotlin-jvm = { id = "org.jetbrains.kotlin.jvm", version.ref = "kotlin" }
 kotlin-parcelize = { id = "org.jetbrains.kotlin.plugin.parcelize", version.ref = "kotlin" }
 kotlin-serialization = { id = "org.jetbrains.kotlin.plugin.serialization", version.ref = "kotlin" }
+kover = { id = "org.jetbrains.kotlinx.kover", version.ref = "kover" }
 protobuf = { id = "com.google.protobuf", version.ref = "protobuf-gradle-plugin" }
 secrets = { id = "com.google.android.libraries.mapsplatform.secrets-gradle-plugin", version.ref = "secrets-gradle-plugin" }
 spotless = { id = "com.diffplug.spotless", version .ref= "spotless" }

mesh_service_example/build.gradle.kts

@@ -23,6 +23,7 @@ plugins {
     alias(libs.plugins.compose)
     alias(libs.plugins.protobuf)
     alias(libs.plugins.detekt)
+    alias(libs.plugins.kover)
 }
 
 android {

network/build.gradle.kts

@@ -25,6 +25,7 @@ plugins {
     alias(libs.plugins.detekt)
     id("kotlinx-serialization")
     alias(libs.plugins.dokka)
+    alias(libs.plugins.kover)
 }
 
 android {