generator.generateEvents(1, 20, 500, 10, events); // event size = 71, can append.
long cwp1 = reflector.getCurrentWritePosition().getPosition();
dbusBuf.startEvents();
int evCount = 0;
evCount = appender.addEventToBuffer(events.firstElement(), evCount);
Assert.assertEquals(1, evCount);
long cwp2 = reflector.getCurrentWritePosition().getPosition();
Assert.assertTrue("Cwp should differ event write", cwp1 != cwp2);
// Roll back.