test: add jacoco

.github/workflows/ci.yaml

@@ -17,4 +17,9 @@ jobs:
       - name: Setup Gradle
         uses: gradle/actions/setup-gradle@v4
       - name: Test with Gradle
-        run: ./gradlew test
+        run: ./gradlew test
+      - name: Generate JaCoCo Badge
+        uses: cicirello/jacoco-badge-generator@v2
+        with:
+          generate-branches-badge: true
+          jacoco-csv-file: generator/build/reports/jacoco/test/jacocoTestReport.csv

build.gradle

@@ -1,5 +1,6 @@
 allprojects {
     apply(plugin: 'java')
+    apply(plugin: 'jacoco')
 
     repositories {
         mavenCentral()
@@ -11,6 +12,13 @@ allprojects {
         }
     }
 
+    test {
+        finalizedBy jacocoTestReport // report is always generated after tests run
+    }
+    jacocoTestReport {
+        dependsOn test // tests are required to run before generating the report
+    }
+
     dependencies {
         testImplementation platform('org.junit:junit-bom:5.11.3')
         testImplementation 'org.junit.jupiter:junit-jupiter'

generator/build.gradle

@@ -5,6 +5,22 @@ plugins {
 group = 'com.reajason.javaweb.memsell'
 version = '1.0-SNAPSHOT'
 
+jacocoTestReport {
+    reports {
+        html.required = true
+        csv.required = true
+    }
+    afterEvaluate {
+        classDirectories.setFrom(files(classDirectories.files.collect {
+            fileTree(dir: it, exclude: [
+                    'com/reajason/javaweb/memsell/**/godzilla/**',
+                    'com/reajason/javaweb/memsell/**/injector/**',
+                    'com/reajason/javaweb/config/**'
+            ])
+        }))
+    }
+}
+
 dependencies {
     implementation 'net.bytebuddy:byte-buddy:1.15.1'
     implementation 'javax.servlet:javax.servlet-api:3.0.1'