ByteArrayOutputStream baos = new ByteArrayOutputStream();
PumpStreamHandler handler = new PumpStreamHandler(baos, System.err, bais);
ProcessExecutor exec = new ProcessExecutor("java", "-cp", "target/test-classes",
PrintInputToOutput.class.getName()).readOutput(true);
exec.streams(handler);
String result = exec.execute().outputUTF8();
Assert.assertEquals(str, result);
}