Currently logs during tests execution are exported to *.xml report only for failed tests.
The xsd schema also implies the same(surefire-test-report-3.0.xsd,legacy-surefire-test-report.xsd) , system-out elment is always a child of failure,rerunFailure,flakyFailure,rerunError or flakyError element.
Some part of the code(createOutErrElements adds the system-out) :
Because logs are not exported for successfully tests there is no way(outside IDE or complete log) one could nicely explore what a particular test is doing. This is hurting also the documentation part of a test.Imagine those tests are used as end to end tests and business analysts would like to review through CI tools like jenkins.
Enable maven sure fire plugin to export logs to system-out also for succefully passed tests through an optional parameter leaving the default behaviour as it is right now(only failed tests have outputs exported). This means of course also enchancing the xsd to support system-out to different parent rather then only failed ones.
Since it happens I am also a developer I can of course help with the feature implementation if you find this something that makes sense.