Building single fat jar from a multi module maven project - including test classes

Question

I'm in a situation where I need to build a fat jar from a multi module maven project. The project is built based on Selenium/cucumber API's.

Structure of my project is as follows

   Parent -- pom
   |
   |__core_module src/main/java --> helper classes for selenium
   |
   |__acme_module src/main/test --> Test Classes for acme project

I have tried different ways to build a "acme_test.jar" which includes core_module+acme_module.But none of them helped me.

Much appreciate any clue to solve this .

Thanks

Answer 1

As @MariuszS mentions, first restructure your project so that you separate any Unit tests or integration tests for the actual classes that test (=drive/verify navigation for) Acme.

   Parent -- pom
   |
   |__core_module src/main/java --> helper classes for selenium
   |
   |__acme_module src/main/java --> Classes specific for navigating acme 
   |
   |__acme_module src/test/java--> (Unit etc) Test Classes for acme project

Then, you need acme_module to contain core_module as dependency.

Finally, in acme_module, put this in your build plugins section:

<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-shade-plugin</artifactId>
    <version>2.4.3</version>
    <executions>
        <execution>
            <id>create-fat-jar</id>
            <phase>package</phase>
            <goals>
                <goal>shade</goal>
            </goals>
            <configuration>
                <transformers>
                <!-- add Main-Class to manifest file -->
                    <transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
                        <mainClass>your.main.class</mainClass>
                    </transformer>
                </transformers>
                    <finalName>YourJarName</finalName>
            </configuration>
        </execution>
    </executions>
</plugin>

You can also explicitly include the core_module by adding an include filter in the plugin configuration section

Answer 2

Configure acme_module as fat module - this module should produce executable fat jar with all dependencies.

Add core_module to acme_module as dependency.

Move your test classes from src/test/java to src/main/java, because this class should be executable. If you have tests (like junit), then leave this classes inside test directory, but executable part should stay in main.