@ParameterizedTest(name = "{index} => test {0}")
    @MethodSource("nullEleCodeKeys")
    public void testListEleCode(final String key) {
        Map<String, List<EnumVO>> list = enumService.list();
        List<EnumVO> enums = list.get(key);
        enums.forEach(e -> assertThat(e.getCode(), nullValue()));
    }
test element code.

@param key element key
shenyu-admin/src/test/java/org/apache/shenyu/admin/service/EnumServiceTest.java