JUnit test for System.out.println()

Question

I need to write JUnit tests for an old application that\'s poorly designed and is writing a lot of error messages to standard output. When the getResponse(String reque

Answer 1

I know this is an old thread, but there is a nice library to do this:

System Rules

Example from the docs:

public void MyTest {
    @Rule
    public final SystemOutRule systemOutRule = new SystemOutRule().enableLog();

    @Test
    public void overrideProperty() {
        System.out.print("hello world");
        assertEquals("hello world", systemOutRule.getLog());
    }
}

It will also allow you to trap System.exit(-1) and other things that a command line tool would need to be tested for.