How can I make the test jar include dependencies in Maven? - maven

Question

I have a project with src/main/java and src/test/java structure, and I managed to use maven-jar-plugin to build a jar of the test branch. However, I want to package the test jar so that all the dependencies are resolved. Is there a way I can tell maven-jar-plugin to include the dependencies??
Thanks!
Frank

Answer 1

I had a similar problem with integration tests I need to run on Hadoop. Our integration tests are located in the test folder of a separate integration test module, so what is required is a test-jar-with-dependencies to make our life easier.
I'm using the assembly plugin as mentioned by Michael-O. My assembly descriptor is located in src/main/assembly/test-jar-with-dependencies.xml and is a modification of the standard jar-with-dependencies descriptor that's part of the plugin:
<assembly xmlns="http://maven.apache.org/plugins/maven-assembly-plugin/assembly/1.1.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/plugins/maven-assembly-plugin/assembly/1.1.0 http://maven.apache.org/xsd/assembly-1.1.0.xsd">
<id>test-jar-with-dependencies</id>
<formats>
<format>jar</format>
</formats>
<includeBaseDirectory>false</includeBaseDirectory>
<dependencySets>
<dependencySet>
<outputDirectory>/</outputDirectory>
<useProjectArtifact>true</useProjectArtifact>
<!-- we're creating the test-jar as an attachement -->
<useProjectAttachments>true</useProjectAttachments>
<unpack>true</unpack>
<scope>test</scope>
</dependencySet>
</dependencySets>
</assembly>
This assembly relies on the test-jar being created as part of the module build. So I added the following to the module's pom.xml:
<!-- create a complete jar for testing in other environments -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
<executions>
<execution>
<goals>
<goal>test-jar</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-assembly-plugin</artifactId>
<configuration>
<descriptors>
<descriptor>src/main/assembly/test-jar-with-dependencies.xml</descriptor>
</descriptors>
</configuration>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>single</goal>
</goals>
</execution>
</executions>
</plugin>

Answer 2

You can do this: Create a jar assembly with the assembly plugin, have the dependencies unpacked, pack a new test jar and attach it to the reactor. You're done.
The descriptor for the packaging could look like this.

Answer 3

In a similar situation I ended up moving my test code to a separate jar and made it depend on the original one. You can use an aggregator project to ensure that tests are run when you build the main jar.

Answer 4

<dependency>
<groupId>me.wener.xxx</groupId>
<artifactId>xxx-core</artifactId>
<version>${xxx.version}</version>
<type>test-jar</type>
<!-- <scope>test</scope> -->
</dependency>
I use this to include the test jar.the important line is <type>test-jar</type>.I am not sure this is what you need.
3 years ago, but may help others.At least, it helped me. :-)

Answer 5

to include a test-jar dependency in your assembly specify the include filter of the assembly debendencySet as bellow:
...
<dependencySet>
<outputDirectory>/</outputDirectory>
<includes>
<include>*:jar:*</include>
<include>*:test-jar:*</include>
</includes>
</dependencySet>
...

Answer 6

The following worked for Maven 3
POM.XML
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
<version>2.6</version>
<executions>
<execution>
<goals>
<goal>test-jar</goal>
</goals>
<phase>test-compile</phase>
</execution>
</executions>
</plugin>
ASSEMBLY FILE
<dependencySet>
<outputDirectory>demo/test-lib</outputDirectory>
<includes>
<!--test only dependencies (like netty)-->
<include>io.netty:netty-all</include>
<!-- the actual test jar-->
<include>${project.groupId}:${project.artifactId}:test-jar</include>
</includes>
<useProjectAttachments>true</useProjectAttachments>
<scope>test</scope>
</dependencySet>