Why does report-aggregate has 0% coverage?

[car...@redhat.com]

I'm trying to create a report-aggregate for my multi-module project, the only problem is that if use the goal report-aggregate I lose all the percentage. As shown in the image, during the same execution I get some coverage if I open the single module report, but there is no coverage if I open the aggregate report. I am using the report module, so I have this in /tests/pom.xml:

<plugin>
        <groupId>org.jacoco</groupId>
        <artifactId>jacoco-maven-plugin</artifactId>
        <version>0.8.3</version>
        <executions>
                <execution>
                        <id>pre-unit-test</id>
                        <goals>
                                <goal>prepare-agent</goal>
                        </goals>
                        <configuration>
                                <destFile>${jacoco.ut.execution.data.file}</destFile>
                                <propertyName>surefireArgLine</propertyName>
                        </configuration>
                </execution>
        </executions>

</plugin>

And this is /tests/report/pom.xml, before the plugin there are all the dependencies to the modules:

<plugin>
        <groupId>org.jacoco</groupId>
        <artifactId>jacoco-maven-plugin</artifactId>
        <executions>
                <execution>
                        <id>report-aggregate</id>
                        <phase>verify</phase>
                        <goals>
                                <goal>report-aggregate</goal>
                        </goals>
                </execution>
        </executions>

</plugin>

I've also tried with merge and with report after merge, but I always get the same cumulative report with all the modules but no coverage.
Does anyone know what's wrong?

[Marc Hoffmann]

Hi,

you configured a custom location for your exec files:

<destFile>${jacoco.ut.execution.data.file}</destFile>

By default the report-aggregate goal picks exec files from target/*.exec

Maybe configuration needs to be adjusted here? See documentation: https://www.jacoco.org/jacoco/trunk/doc/report-aggregate-mojo.html#dataFileIncludes

If you click on the “Sessions” link on the top right corner, you will see wich execution data was loaded for the report. Also the build log will tell you.

Regards,

-marc

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