assertThrows(SmbException.class, () -> {
            validator.validateString("test\u0001string", 100, "test");
        });
    }

    @Test
    public void testStringWithAllowedWhitespace() throws Exception {
        validator.validateString("test\tstring", 100, "test");
        validator.validateString("test\r\nstring", 100, "test");
        // Should pass without exception
    }

    @Test

     * @param str string to validate
     * @param maxLength maximum allowed length
     * @param fieldName field name for error messages
     * @throws SmbException if string is invalid
     */
    public void validateString(String str, int maxLength, String fieldName) throws SmbException {
        totalValidations.incrementAndGet();

        if (str == null) {
            return; // Null strings are allowed
        }