### Question:
CheckUtils { public static boolean checkPhone(String phone) { return StringUtils.isEmpty(phone) || phone.length() == 11; } private  CheckUtils(); static boolean checkUserName(String userName); static boolean checkEmail(String email); static Map<String, Object> checkDesc(String desc); static boolean checkOtherParams(String otherParams); static boolean checkPassword(String password); static boolean checkPhone(String phone); static boolean checkTaskNodeParameters(String parameter, String taskType); static boolean checkUserParams(String userName, String password, String email, String phone);  }### Answer:
@Test public void testCheckPhone() { assertTrue(CheckUtils.checkPhone(null)); assertFalse(CheckUtils.checkPhone("14567134578654")); assertTrue(CheckUtils.checkPhone("17362537263")); }