assertEquals("abc", StringUtil.substringToLast("abc", "dddd"));
    }

    /**
     * @throws Exception
     */
    @Test
    public void testToHex() throws Exception {
        assertEquals("010203", StringUtil.toHex(new byte[] { 1, 2, 3 }));
    }

    /**
     * @throws Exception
     */
    @Test
    public void testToHex2() throws Exception {
        assertEquals("0001", StringUtil.toHex(1));

          <match value="\nStatus:" type="string" offset="0:1024"/>
          <match value="\nSubject:" type="string" offset="0:1024"/>
          <match value="\nTo:" type="string" offset="0:1024"/>
          <match value="\nUser-Agent:" type="string" offset="0:1024"/>
          <match value="\nX-Mailer:" type="string" offset="0:1024"/>
          <match value="\nX-Originating-IP:" type="stringignorecase" offset="0:1024"/>