Try to get code coverage to work

Author: cowtowncoder

.github/workflows/main.yml

@@ -33,7 +33,7 @@ jobs:
         java-version: ${{ matrix.java_version }}
         cache: 'maven'
     - name: Build
-      run: ./mvnw -B -q -ff -ntp verify
+      run: ./mvnw -B -ff -ntp clean verify
     - name: Generate code coverage
       if: github.event_name != 'pull_request' && matrix.java_version == '8'
       run: ./mvnw -B -q -ff -ntp test

pom.xml

@@ -139,6 +139,28 @@ com.fasterxml.classmate.*;version=${project.version}
 		</execution>
               </executions>
 	    </plugin>
+
+            <!-- 11-Oct-2023, tatu: Try to produce Code coverage: -->
+            <plugin>
+              <groupId>org.jacoco</groupId>
+              <artifactId>jacoco-maven-plugin</artifactId>
+              <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>
     </build>
     <profiles>