Add jacoco plugin

oysteikt-calc/pom.xml

@@ -77,6 +77,7 @@
 
   <build>
     <plugins>
+
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-compiler-plugin</artifactId>
@@ -85,6 +86,7 @@
           <release>16</release>
         </configuration>
       </plugin>
+
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-surefire-plugin</artifactId>
@@ -101,6 +103,29 @@
           <mainClass>oysteikt.calc.CalcApp</mainClass>
         </configuration>
       </plugin>
+
+      <!-- Plugin to generate code coverage reports -->
+      <plugin>
+        <groupId>org.jacoco</groupId>
+        <artifactId>jacoco-maven-plugin</artifactId>
+        <version>0.8.6</version>
+        <executions>
+          <execution>
+            <id>default-prepare-agent</id>
+            <goals>
+              <goal>prepare-agent</goal>
+            </goals>
+          </execution>
+          <execution>
+            <id>default-report</id>
+            <phase>prepare-package</phase>
+            <goals>
+              <goal>report</goal>
+            </goals>
+          </execution>
+        </executions>
+      </plugin>
+
     </plugins>
   </build>
 </project>