1 files changed, 55 insertions, 0 deletions
diff --git a/app/build.gradle.kts b/app/build.gradle.kts
index 32313ab..03b240e 100644
--- a/app/build.gradle.kts
+++ b/app/build.gradle.kts
@@ -4,6 +4,8 @@ plugins {
     id("org.jetbrains.kotlin.plugin.serialization")
     id("org.jetbrains.kotlin.plugin.compose")
     id("com.google.devtools.ksp")
+    id("io.gitlab.arturbosch.detekt")
+    id("jacoco")
 }
 
 android {
@@ -19,6 +21,9 @@ android {
     }
 
     buildTypes {
+        debug {
+            enableUnitTestCoverage = true
+        }
         release {
             isMinifyEnabled = false
         }
@@ -70,3 +75,53 @@ dependencies {
     testImplementation("org.jetbrains.kotlinx:kotlinx-coroutines-test:1.8.0")
     testImplementation("androidx.room:room-testing:2.6.1")
 }
+
+detekt {
+    buildUponDefaultConfig = true
+    allRules = false
+    config.setFrom(files("$rootDir/config/detekt/detekt.yml"))
+    baseline = file("$rootDir/config/detekt/baseline.xml")
+}
+
+tasks.withType<io.gitlab.arturbosch.detekt.Detekt>().configureEach {
+    reports {
+        xml.required.set(true)
+        html.required.set(true)
+        txt.required.set(false)
+        sarif.required.set(false)
+    }
+}
+
+// JVM unit-test line coverage over testable business logic. Compose screens under ui/ are
+// excluded -- they're impractical to unit-test for coverage and would make the metric
+// meaningless (see CLAUDE.md). Room- and KSP-generated code is excluded too, since coverage
+// there measures generated boilerplate, not anything we wrote.
+tasks.register<JacocoReport>("jacocoTestReport") {
+    dependsOn("testDebugUnitTest")
+    group = "verification"
+    description = "Generates a Jacoco coverage report for the debug unit tests."
+
+    reports {
+        xml.required.set(true)
+        html.required.set(true)
+    }
+
+    val fileFilter = listOf(
+        "**/R.class", "**/R$*.class", "**/BuildConfig.*", "**/Manifest*.*",
+        "android/**/*.*",
+        "**/ui/**",
+        "**/*_Impl.class", "**/*_Impl$*.class",
+        "**/di/**"
+    )
+    val kotlinDebugTree = fileTree("${layout.buildDirectory.get()}/tmp/kotlin-classes/debug") {
+        exclude(fileFilter)
+    }
+    val javaDebugTree = fileTree("${layout.buildDirectory.get()}/intermediates/javac/debug/classes") {
+        exclude(fileFilter)
+    }
+    classDirectories.setFrom(files(kotlinDebugTree, javaDebugTree))
+    sourceDirectories.setFrom(files("${project.projectDir}/src/main/java"))
+    executionData.setFrom(fileTree(layout.buildDirectory.get()) {
+        include("outputs/unit_test_code_coverage/debugUnitTest/testDebugUnitTest.exec", "jacoco/testDebugUnitTest.exec")
+    })
+}