I had a look and indeed the cleanest way would be to comvert the JSON file from the report into a valid jUnit XML file. I quickly looked for any plugin which would help do that but did not find any.
So for now, I don’t export the report, and I configured a Warnings task to parse the log.
Here is the regexp:
^\s*.]AutomationTestingLog: Error:\s(.)((\d+)): (.)(.*)$
And the mapping script:
import hudson.plugins.warnings.parser.Warning
import hudson.plugins.analysis.util.model.Priority
String category = "Unit Tests"
String fileName = matcher.group( 1 )
String lineNumber = matcher.group( 2 )
String message = matcher.group( 3 )
Priority priority = Priority.HIGH;
return new Warning( fileName, Integer.parseInt(lineNumber), "UE4", category, message, priority );