@Test
public void ocrCalcCaptcha() throws Exception {

    OCRUtil util = new OCRUtil();
    List<String> excepted = Files.readAllLines(Paths.get(
            getClass().getResource("/captcha/excepted.txt").toURI()));
    //PROBLEM:CAPTCHA NO.13 CAN'T WORK!
    for (int i = 0; i < 50;i++) {
        String str = util.ocrCalcCaptcha(ImageIO.read(
                getClass().getResource("/captcha/captcha" + i + ".png")));
        System.out.println(str.trim());
        assertEquals(excepted.get(i).trim(), str.trim());
    }
}