@Test
public void eventWasPreparedForDeferredProcessing() {
asyncAppender.addAppender(listAppender);
asyncAppender.start();
String k = "k" + diff;
MDC.put(k, "v");
asyncAppender.doAppend(builder.build(diff));
MDC.clear();
asyncAppender.stop();
assertFalse(asyncAppender.isStarted());
// check the event
assertEquals(1, listAppender.list.size());
ILoggingEvent e = listAppender.list.get(0);
// check that MDC values were correctly retained
assertEquals("v", e.getMDCPropertyMap().get(k));
assertFalse(e.hasCallerData());
}
