#62 Add Code coverage report

.github/workflows/pr-workflow.yaml

@@ -0,0 +1,40 @@
+name: Measure coverage
+
+on:
+  pull_request:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    permissions:
+      pull-requests: write
+    steps:
+      - uses: actions/checkout@v3
+      - name: Set up JDK 11
+        uses: actions/setup-java@v3
+        with:
+          java-version: '11'
+          distribution: 'zulu'
+      - name: Run Coverage
+        run: |
+          chmod +x gradlew
+          ./gradlew jacocoTestReport
+
+      - name: Add coverage to PR
+        id: jacoco
+        uses: madrapps/[email protected]
+        with:
+          paths: |
+            ${{ github.workspace }}/**/build/reports/jacoco/**/jacocoTestReport.xml
+          token: ${{ secrets.GITHUB_TOKEN }}
+          min-coverage-overall: 40
+          min-coverage-changed-files: 60
+          title: Code Coverage
+          update-comment: true
+
+      - name: Fail PR if overall coverage is less than 80%
+        if: ${{ steps.jacoco.outputs.coverage-overall < 80.0 }}
+        uses: actions/github-script@v6
+        with:
+          script: |
+            core.setFailed('Overall coverage is less than 80%!')

build.gradle

@@ -30,6 +30,7 @@ buildscript {
 plugins {
     id("net.ltgt.errorprone") version "3.0.1" apply false
     id "org.sonarqube" version "4.2.1.3168"
+    id "jacoco"
 }
 
 apply(plugin: "java-library");
@@ -65,6 +66,11 @@ test {
     useTestNG() {
         useDefaultListeners = true;
     };
+    finalizedBy jacocoTestReport // report is always generated after tests run
+}
+
+jacocoTestReport {
+    dependsOn test // tests are required to run before generating the report
 }
 
 /*
@@ -100,6 +106,12 @@ artifacts {
     archives javadocJar;
 }
 
+jacocoTestReport{
+    reports {
+        xml.enabled true
+        html.enabled true
+    }
+}
 
 wrapper {
     gradleVersion = "7.6.1";