Managing custom processor logging statements during JUnit testing

[Russell Bateman]

I'm interested in getting log statements that may occur from my *custom 
processor* code at the INFO, DEBUGand TRACElevels when running unit 
tests for it. This means that I would like to set (programmatically at 
runtime or by configuration) what I am used to setting in 
/${NIFI_ROOT}///conf/logback.xml/, but effectively in/during my unit 
tests (using NiFi's TestRunner). And, obviously, I'd like to see those 
log statements come out to the console.

Thanks for any advice.