integrate with jacoco

Author: fluentfuture

.github/workflows/ci.yaml

@@ -0,0 +1,43 @@
+name: Java CI
+on: [push, pull_request]
+
+permissions:
+  contents: write    # Required to push the badge SVG back to the repo
+  actions: read      # Optional: helpful for some internal metadata
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up JDK
+        uses: actions/setup-java@v4
+        with:
+          java-version: '17'
+          distribution: 'temurin'
+      - name: Build and Test
+        run: mvn test # or ./gradlew test
+      - name: Generate JaCoCo Badge
+        uses: cicirello/jacoco-badge-generator@v2
+        with:
+          # Maven's default JaCoCo CSV location
+          jacoco-csv-file: target/site/jacoco/jacoco.csv
+          badges-directory: .github/badges
+          generate-branches-badge: true
+          generate-summary: true
+      - name: Log coverage percentage
+        run: |
+          echo "coverage = ${{ steps.jacoco.outputs.coverage }}"
+          echo "branch coverage = ${{ steps.jacoco.outputs.branches }}"
+
+      - name: Commit and push badges
+        if: github.event_name != 'pull_request'
+        run: |
+          cd .github/badges
+          if [[ `git status --porcelain` ]]; then
+            git config --global user.name 'github-actions'
+            git config --global user.email '41898282+github-actions[bot]@users.noreply.github.com'
+            git add *.svg
+            git commit -m "Autogenerated JaCoCo coverage badge"
+            git push
+          fi

pom.xml

@@ -236,7 +236,20 @@
         </plugin>
         <plugin>
           <artifactId>maven-surefire-plugin</artifactId>
-          <version>2.22.0</version>
+          <version>3.2.5</version>
+          <configuration>
+            <threadCount>1</threadCount>
+            <includes>
+              <include>**/*Test.java</include>
+            </includes>
+          </configuration>
+          <dependencies>
+            <dependency>
+              <groupId>org.apache.maven.surefire</groupId>
+              <artifactId>surefire-junit4</artifactId>
+              <version>3.2.5</version>
+            </dependency>
+          </dependencies>
         </plugin>
         <plugin>
           <artifactId>maven-jar-plugin</artifactId>
@@ -325,10 +338,42 @@
           </execution>
           </executions>
         </plugin>
+        <plugin>
+          <groupId>org.jacoco</groupId>
+          <artifactId>jacoco-maven-plugin</artifactId>
+          <version>0.8.14</version>
+          <executions>
+            <execution>
+              <id>default-prepare-agent</id>
+              <phase>initialize</phase>
+              <goals>
+                <goal>prepare-agent</goal>
+              </goals>
+            </execution>
+            <execution>
+              <id>report</id>
+              <phase>test</phase>
+              <goals>
+                <goal>report</goal>
+              </goals>
+              <configuration>
+                <formats>
+                    <format>HTML</format>
+                    <format>XML</format>
+                    <format>CSV</format>
+                </formats>
+              </configuration>
+            </execution>
+          </executions>
+        </plugin>
       </plugins>
     </pluginManagement>
 
     <plugins>
+	  <plugin>
+	    <groupId>org.jacoco</groupId>
+	    <artifactId>jacoco-maven-plugin</artifactId>
+	  </plugin>
       <plugin>
         <artifactId>maven-compiler-plugin</artifactId>
         <configuration>