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

Replace it for the duration of your test:

String data = "the text you want to send";
InputStream testInput = new ByteArrayInputStream( data.getBytes("UTF-8") );
InputStream old = System.in;
try {
    System.setIn( testInput );

    ...
} finally {
    System.setIn( old );
}