-Darquillian.debug=true allow more insight into test lifecycle and drastically improves debugging experience by outputting call tree of Arquillian event system.
There is sample call tree for debugging Warp client-side full tree:
Similarly for container.
The problem with debugging is that people need to setup VM arguments in Container Configuration
and then setup JUnit/TestNG VM arguments for each executed test specifically.
This button switch in toolbar should allow to add -Darquillian.debug=true to executed test (either JUnit or TestNG) and also into container configuration.