Arquillian Error: ArchiveExportException

I ran into a baffling error the other day while working with Arquillian. I added Arquillian to a simple project requiring only the Java SE container for some “lite” CDI injection. However, when I went to run the unit tests, they failed:

 

org.jboss.shrinkwrap.api.exporter.ArchiveExportException: File could not be created: target/test.jar
 at org.jboss.shrinkwrap.impl.base.exporter.AbstractStreamExporterImpl.getOutputStreamToFile(AbstractStreamExporterImpl.java:95)
 at org.jboss.shrinkwrap.impl.base.exporter.AbstractStreamExporterImpl.exportTo(AbstractStreamExporterImpl.java:144)
 at org.jboss.arquillian.container.se.managed.ManagedSEDeployableContainer.materializeArchive(ManagedSEDeployableContainer.java:294)
 at org.jboss.arquillian.container.se.managed.ManagedSEDeployableContainer.deploy(ManagedSEDeployableContainer.java:191)

This didn’t make any sense as the output directories were all writeable etc. I had another similar project that worked. Comparing both projects, I eventually added  a barebones arquillian.xml config file. That did the trick! The magic appears toe be the deploymentExportPath – not sure why this is needed.

<arquillian xmlns="http://jboss.org/schema/arquillian"
            xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
            xsi:schemaLocation="
        http://jboss.org/schema/arquillian
        http://jboss.org/schema/arquillian/arquillian_1_0.xsd">
    <engine>
        <property name="deploymentExportPath">target/deployments</property>
    </engine>
&lt;/arquillian&gt;<span id="mce_SELREST_start" style="overflow:hidden;line-height:0">&#65279;</span>

Background on project:

• Gradle build
• Arquillian dependencies:
  • org.jboss.arquillian:arquillian-bom:1.4.0.Final
  • org.jboss.arquillian.junit:arquillian-junit-container:1.4.0.Final
  • org.jboss.arquillian.container:container-se-managed:1.0.2.Final