Repository repository = new VFSRepository(producer.getIoService());
((VFSRepository)repository).setDescriptor(descriptor);
boolean rootFolderExists = repository.directoryExists("/test");
assertFalse(rootFolderExists);
Directory directoryId = repository.createDirectory("/test");
assertNotNull(directoryId);
directoryId = repository.createDirectory("/test2");
assertNotNull(directoryId);
directoryId = repository.createDirectory("/test3/nested");
assertNotNull(directoryId);