Writing data to System.in

Question

In our application, we expect user input within a Thread as follows :

BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
         


        

Answer 1

My solution currently (in 2018) is:

 final byte[] passCode = "12343434".getBytes();
 final ByteArrayInputStream inStream = new ByteArrayInputStream(passCode);
        System.setIn(inStream);

[Update in 2019] For JUnit4 Tests there is a framework for these tasks: https://stefanbirkner.github.io/system-rules/ (the upgrade to JUnit5 is on going: https://github.com/stefanbirkner/system-rules/issues/55)