public void setUp() throws Exception {
super.setUp();
// start from a clean slate for each test
listAppender = new ListAppender();
listAppender.extractLocationInfo = true;
log4jRoot = org.apache.log4j.Logger.getRootLogger();
log4jRoot.addAppender(listAppender);
log4jRoot.setLevel(org.apache.log4j.Level.TRACE);
}