### Question:
ChangeLogSerializerFactory { public Map<String, ChangeLogSerializer> getSerializers() { return serializers; } private  ChangeLogSerializerFactory(); static void reset(); static ChangeLogSerializerFactory getInstance(); Map<String, ChangeLogSerializer> getSerializers(); ChangeLogSerializer getSerializer(String fileNameOrExtension); void register(ChangeLogSerializer changeLogSerializer); void unregister(ChangeLogSerializer changeLogSerializer);  }### Answer:
@Test public void getSerializers() { ChangeLogSerializer serializer = ChangeLogSerializerFactory.getInstance().getSerializer("xml"); assertNotNull(serializer); assertTrue(serializer instanceof XMLChangeLogSerializer); }