@Override
    protected String selectorHandler(final MetaDataRegisterDTO metaDataDTO) {
        return "";
    }
@Test
    public void testSelectorHandler() {
        MetaDataRegisterDTO metaDataRegisterDTO = MetaDataRegisterDTO.builder().build();
        assertEquals(StringUtils.EMPTY, shenyuClientRegisterWebSocketService.selectorHandler(metaDataRegisterDTO));
    }