How can I configure the maven shade plugin to include test code in my jar?

With version 2.2 of the maven-shade-plugin, they added a "shadeTestJar" option (see MSHADE-158): http://maven.apache.org/plugins/maven-shade-plugin/shade-mojo.html#shadeTestJar

However, I tried using this and couldn't get it to work. Here's my plugin config:

<plugin>    <groupId>org.apache.maven.plugins</groupId>    <artifactId>maven-shade-plugin</artifactId>    <version>2.2</version>    <executions>        <execution>            <phase>package</phase>            <goals>                <goal>shade</goal>            </goals>            <configuration>                <shadeTestJar>true</shadeTestJar>            </configuration>        </execution>    </executions></plugin>

The "...-tests.jar" file has no entries, but the main shaded jar looks fine (although it doesn't contain any test classes).

Also, this question duplicates this other question, although the accepted answer isn't real satisfying: How to include test classes in Jar created by maven-shade-plugin?

These last couple of answers are messy workarounds for a broken feature at best. The fact of the matter remains that there is a bug in maven-shade-plugin. In the meantime I've investigated and root-caused the bug, and created a patch. Now I hope someone at Apache includes it soon and then finally the shadeTestJar feature can work like it's supposed to.

I've managed to make it work by adding :

<plugin>     <groupId>org.codehaus.mojo</groupId>     <artifactId>build-helper-maven-plugin</artifactId>     <version>1.9.1</version>     <executions>        <execution>            <id>add-source</id>            <phase>generate-sources</phase>            <goals>               <goal>add-source</goal>            </goals>            <configuration>               <sources>                   <source>${project.basedir}/src/test/java/</source>               </sources>            </configuration>        </execution>      </executions></plugin>