Add boilerplate coverage

Clunky since it does not run inside the main lifecycle.

Author: rmaucher

build.sh

@@ -15,5 +15,10 @@
 # specific language governing permissions and limitations
 # under the License.
 
-export MAVEN_OPTS="--add-opens=java.base/java.util.zip=ALL-UNNAMED --add-opens=java.base/java.util.jar=ALL-UNNAMED --add-opens=java.base/sun.net.www.protocol.http=ALL-UNNAMED --add-opens=java.base/java.lang=ALL-UNNAMED"
+export MAVEN_OPTS="-javaagent:$HOME/.m2/repository/org/jacoco/org.jacoco.agent/0.8.13/org.jacoco.agent-0.8.13-runtime.jar=destfile=/tmp/jacoco/jacoco-it.exec --add-opens=java.base/java.util.zip=ALL-UNNAMED --add-opens=java.base/java.util.jar=ALL-UNNAMED --add-opens=java.base/sun.net.www.protocol.http=ALL-UNNAMED --add-opens=java.base/java.lang=ALL-UNNAMED"
+
+# Run the main build lifecycle + integration tests
 mvn clean install failsafe:integration-test invoker:integration-test
+
+# Generate JaCoCo report from integration test coverage data
+mvn jacoco:report -Djacoco.dataFile=/tmp/jacoco/jacoco-it.exec

pom.xml

@@ -469,6 +469,11 @@
                     <groupId>org.apache.maven.plugins</groupId>
                     <artifactId>maven-javadoc-plugin</artifactId>
                 </plugin>
+                <plugin>
+                    <groupId>org.jacoco</groupId>
+                    <artifactId>jacoco-maven-plugin</artifactId>
+                    <version>0.8.13</version>
+                </plugin>
             </plugins>
         </pluginManagement>
         <plugins>
@@ -533,6 +538,18 @@
                     </execution>
                 </executions>
             </plugin>
+            <plugin>
+                <groupId>org.jacoco</groupId>
+                <artifactId>jacoco-maven-plugin</artifactId>
+                <executions>
+                    <execution>
+                        <id>default-prepare-agent</id>
+                        <goals>
+                            <goal>prepare-agent</goal>
+                        </goals>
+                    </execution>
+                </executions>
+            </plugin>
         </plugins>
     </build>