private void testDeleteForEmptyIds() {
        List<String> ids = Lists.newArrayList();
        int count = metaDataService.deleteByIdsAndNamespaceId(ids, SYS_DEFAULT_NAMESPACE_ID);
        Assertions.assertEquals(0, count,
                "The count of delete should be 0.");
    }
Cases where get an empty id list.
shenyu-admin/src/test/java/org/apache/shenyu/admin/service/MetaDataServiceTest.java