Arquillian - howto enrich web.xml to include ArquillianServletRunner mapping?

[hanasaki]

Running Arquillian 1.1.5.Final and AS 7.2

The JUnit test creates a web archive and adds a simple web.xml to it (no servlets, filters etc...)

When the WAR is deployed and the test method runs, the below error is output.

A web posting talks about Arquillian "enriching" the web.xml to include this servlet however it does not appear to be doing so.

What exactly results in the web.xml being enriched to add the ArquillianServletRunner automagically instead of requiring this to be manually added to the test WAR web.xml?

java.lang.IllegalArgumentException: ArquillianServletRunner not found. Could not determine ContextRoot from ProtocolMetadata, please contact DeployableContainer developer.

[hanasaki]

WAR file names with more than one '.' cause this.  filename "myApp.war" is OK.  filename "my.app.war" causes the error.

[kpiwko]

Reported here: [WFLY-1717] ContextName creation does not honor '.' in archive name - JBoss Issue Tracker