public void testTrimPrefix() throws Exception {
        assertEquals("AAA", StringUtil.trimPrefix("T_AAA", "T_"));
    }

    /**
     * @throws Exception
     */
    @Test
    public void testIsBlank() throws Exception {
        assertEquals("1", true, StringUtil.isBlank(" "));
        assertEquals("2", true, StringUtil.isBlank(""));
        assertEquals("3", false, StringUtil.isBlank("a"));