AbstractLoggerFactory implements LoggerFactory { @Override public synchronized LoggerFormatter getFormatter() { return formatter; } AbstractLoggerFactory(); @Override Logger create(Class<?> binding); @Override Logger create(String binding); @Override synchronized void setFormatter(LoggerFormatter formatter); @Override synchronized LoggerFormatter getFormatter(); abstract Logger make(String binding, LoggerFormatter formatter); @Override void addListener(LoggerEventListener listener); @Override void removeListener(LoggerEventListener listener); @Override Stream<LoggerEventListener> listeners(); @Override Stream<Entry<String, Logger>> loggers(); @Override void setLevel(String path, Level level); @Override void setLevel(Class<?> binding, Level level);  }
@Test void getFormatter() { assertNotNull(instance.getFormatter()); instance.setFormatter(FORMATTER); assertEquals(FORMATTER, instance.getFormatter()); }