assertEquals("first,second", result);
    }

    @Test
    @DisplayName("Should handle StringBuffer as CharSequence")
    void testJoinWithStringBuffer() {
        StringBuffer sb1 = new StringBuffer("alpha");
        StringBuffer sb2 = new StringBuffer("beta");
        String result = StringUtil.join("-", sb1, sb2);
        assertEquals("alpha-beta", result);
    }

    @Test

     * <p>
     * Note: This function should probably be changed to return SDDL
     * fragments but currently it does not.
     */
    @Override
    public String toString() {
        final StringBuffer sb = new StringBuffer();
        sb.append(isAllow() ? "Allow " : "Deny  ");
        appendCol(sb, this.sid.toDisplayString(), 25);
        sb.append(" 0x").append(Hexdump.toHexString(this.access, 8)).append(' ');

    @Test
    @DisplayName("Test appendCol helper method")
    void testAppendCol() {
        StringBuffer sb = new StringBuffer();

        // Test with short string
        ace.appendCol(sb, "test", 10);
        assertEquals("test      ", sb.toString());

        // Test with exact width string
        sb = new StringBuffer();
        ace.appendCol(sb, "exact", 5);
        assertEquals("exact", sb.toString());

     * @return the content with highlighted queries
     */
    protected String replaceHighlightQueries(final String cache, final String[] queries) {
        final StringBuffer buf = new StringBuffer(cache.length() + 100);
        final StringBuffer segBuf = new StringBuffer(1000);
        final Pattern p = Pattern.compile("<[^>]+>");
        final Matcher m = p.matcher(cache);
        final String[] regexQueries = new String[queries.length];

     * @return The resolved string.
     */
    public static String resolve(final String value) {
        if (value == null) {
            return null;
        }

        final StringBuffer tunedText = new StringBuffer(value.length());
        final Pattern pattern = Pattern.compile("(\\$\\{([\\w\\.]+)\\})");
        final Matcher matcher = pattern.matcher(value);
        while (matcher.find()) {

            return null;
        }

        @Override
        public String getRequestURI() {
            return "/";
        }

        @Override
        public StringBuffer getRequestURL() {
            return new StringBuffer("http://localhost:8080/");
        }

        @Override
        public String getServletPath() {
            return "";
        }

        @Override

     * fragments but currently it does not.
     */
    @Override
    public String toString() {
        final int count, i;
        final String str;

        final StringBuffer sb = new StringBuffer();
        sb.append(isAllow() ? "Allow " : "Deny  ");
        appendCol(sb, sid.toDisplayString(), 25);
        sb.append(" 0x").append(Hexdump.toHexString(access, 8)).append(' ');

        } else {
            input = input.replace("<!--", "").replace("-->", "");
        }
        final Matcher matcher = getTagPattern().matcher(input);
        final StringBuffer sb = new StringBuffer();
        final Pattern attrPattern = Pattern.compile("\\s[^ ]+=\"([^\"]*)\"");
        while (matcher.find()) {
            final String tagStr = matcher.group();

        }

        @Override
        public String getRequestedSessionId() {
            return null;
        }

        @Override
        public StringBuffer getRequestURL() {
            return new StringBuffer("http://localhost:8080" + requestURI);
        }

        @Override
        public String getServletPath() {
            return "";
        }

        @Override

    /**
     * This is the same as {@link jcifs.util.Hexdump#toHexString(int val, int
     * size)} but provides a more practical form when trying to avoid {@link
     * java.lang.String} concatenation and {@link java.lang.StringBuffer}.
     *
     * @param val the integer value to convert to hexadecimal characters
     * @param dst the destination character array to write the hex digits into