public static void verifyIncrementPubContent(String content) {
        
        if (content == null || content.length() == 0) {
            throw new IllegalArgumentException("publish/delete content can not be null");
        }
        for (int i = 0; i < content.length(); i++) {
            char c = content.charAt(i);
            if (c == '\r' || c == '\n') {
                throw new IllegalArgumentException("publish/delete content can not contain return and linefeed");
            }
            if (c == Constants.WORD_SEPARATOR.charAt(0)) {
                throw new IllegalArgumentException("publish/delete content can not contain(char)2");
            }
        }
    }
@Test
    void testVerifyIncrementPubContentFail2() {
        Throwable exception = assertThrows(IllegalArgumentException.class, () -> {
            String content = "aa\rbbb";
            ContentUtils.verifyIncrementPubContent(content);
        });
        assertTrue(exception.getMessage().contains("publish/delete content can not contain return and linefeed"));
    }