Added JaCoCo for code coverage analysis.

Author: swesteme

.github/workflows/ci.yml

@@ -22,7 +22,7 @@ jobs:
         with:
           java-version: 11
       - name: Build with Maven
-        run: mvn -B -Dgpg.skip verify
+        run: mvn -B -Dgpg.skip jacoco:prepare-agent verify
       - name: Upload code coverage
         if: ${{ success() }}
         run: |

pom.xml

@@ -15,7 +15,8 @@
     <packaging>hpi</packaging>
     <properties>
         <jenkins.version>2.375.4</jenkins.version>
-        <junit.junit.version>5.6.3</junit.junit.version>
+        <junit.junit.version>5.8.0</junit.junit.version>
+        <jacoco.version>0.8.7</jacoco.version>
     </properties>
     <name>Multiselect parameter</name>
 
@@ -99,6 +100,35 @@
                         </dependency>
                     </dependencies>
                 </plugin>
+                <plugin>
+                    <groupId>org.apache.maven.plugins</groupId>
+                    <artifactId>maven-surefire-plugin</artifactId>
+                    <version>3.0.0</version>
+                    <configuration>
+                        <forkCount>2</forkCount>
+                        <reuseForks>false</reuseForks>
+                    </configuration>
+                </plugin>
+                <plugin>
+                    <groupId>org.jacoco</groupId>
+                    <artifactId>jacoco-maven-plugin</artifactId>
+                    <version>${jacoco.version}</version>
+                    <executions>
+                        <execution>
+                            <goals>
+                                <goal>prepare-agent</goal>
+                            </goals>
+                        </execution>
+                        <!-- attached to Maven test phase -->
+                        <execution>
+                            <id>report</id>
+                            <phase>test</phase>
+                            <goals>
+                                <goal>report</goal>
+                            </goals>
+                        </execution>
+                    </executions>
+                </plugin>
             </plugins>
         </pluginManagement>
         <plugins>
@@ -131,6 +161,22 @@
             </plugin>
         </plugins>
     </build>
+    <reporting>
+        <plugins>
+            <plugin>
+                <groupId>org.jacoco</groupId>
+                <artifactId>jacoco-maven-plugin</artifactId>
+                <version>${jacoco.version}</version>
+                <reportSets>
+                    <reportSet>
+                        <reports>
+                            <report>report</report>
+                        </reports>
+                    </reportSet>
+                </reportSets>
+            </plugin>
+        </plugins>
+    </reporting>
     <scm>
         <connection>scm:git:https://github.com/jenkinsci/${project.artifactId}-plugin.git</connection>
         <developerConnection>scm:git:[email protected]:jenkinsci/${project.artifactId}-plugin.git</developerConnection>