Get correct coverage in sonar for unit and integration tests in separate maven modules

Question

My project setup is simple (all source available at github):

parent
↳ backend
↳ client
↳ integration-tests

And after runing maven:

mci sonar:sonar -Dsonar.host.url=http://localhost:9000 -Dsonar.login=12...9

I see that unit and integration tests are visible for sonar, but coverage from IT is not.

For Intelij IDEA jacoco-it.exec looks fine:

I'm assuming that culprit is here:

[INFO] Sensor JaCoCoSensor [java]
[INFO] No JaCoCo analysis of project coverage can be done since there is no class files.
[INFO] Sensor JaCoCoSensor [java] (done) | time=1ms

So I did small hack (in short: copied all source files to integration-test module):

    <properties>
        <sonar.sources>${basedir}/target/copied</sonar.sources>
    </properties>
    [...]
        <!-- hack to generate coverage reports -->
        <plugin>
            <artifactId>maven-resources-plugin</artifactId>
            <version>${maven-resources-plugin.version}</version>
            <executions>
                <execution>
                    <id>copy-resources</id>
                    <phase>generate-sources</phase>
                    <goals>
                        <goal>copy-resources</goal>
                    </goals>
                    <configuration>
                        <outputDirectory>${sonar.sources}</outputDirectory>
                        <resources>
                            <resource>
                                <directory>${basedir}/../backend/src/main/java</directory>
                                <filtering>false</filtering>
                            </resource>
                        </resources>
                    </configuration>
                </execution>
            </executions>
        </plugin>
        <plugin>
            <groupId>org.codehaus.mojo</groupId>
            <artifactId>build-helper-maven-plugin</artifactId>
            <executions>
                <execution>
                    <phase>generate-sources</phase>
                    <goals>
                        <goal>add-source</goal>
                    </goals>
                    <configuration>
                        <sources>
                            <source>${sonar.sources}</source>
                        </sources>
                    </configuration>
                </execution>
            </executions>
        </plugin>

But now all my classes ale duplicated (sonar shows also classes from ../target/copied dir):

Sonar version: 6.5
Jacoco maven plugin: 0.7.5.201505241946 (also tried lastest 0.7.9)

Any ideas what should I do here?

Answer 1

Looks like I have answer for that question:

1. Report wasn't generated because post-unit-test execution was in the wrong phase. Instead of <phase>test</phase> I now have <phase>verify</phase>

2. I had a wrong goal for post-integration-test. The change was from <goal>report-integration</goal> to <goal>report-aggregate</goal>:

   • This goal allows me to create coverage reports when tests are in separate projects from the code under test.

3. Added properties: <jacoco.itReportPath>${project.basedir}/../integrations-tests/target/jacoco-it.exec</jacoco.itReportPath> and <sonar.jacoco.reportPaths>${jacoco.itReportPath},${project.build.directory}/jacoco-it.exec,${project.build.directory}/jacoco.exec</sonar.jacoco.reportPaths>

All those chages and update project available on github

Answer 2

I use mainly jacoco for coverage. You need to have a few things in place before you start

1. Enable and configure surefire plugin
2. Enable and configure the jacoco plugin

It's a one time configuration that you will build and forget, one of my projects serving as parent enables this feature. Feel free to check it out: https://github.com/slixes/parent/blob/master/pom.xml