It can be useful to verify output to System.out in a unit test. For example, if you’re testing application logging or if you’re using log output to sense some other behaviour. It can be tricky to properly mock behaviour of System.out but fortunately, it is possible to test System.out using JUnit.
Don’t Panic!
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Don't Panic! blog and example code by Stuart 'Stevie' Leitch is licensed under a Creative Commons Attribution 3.0 Unported License.The views expressed on this blog are my own and do not necessarily reflect the views of my employers, past or present.