@Test
public void deleteEmployeeByInvalidSsn() {
employeeDao.deleteEmployeeBySsn("23423");
Assert.assertEquals(employeeDao.findAllEmployees().size(), 2);
}
@Test
public void deleteEmployeeBySsn() {
employeeDao.deleteEmployeeBySsn("11111");
Assert.assertEquals(employeeDao.findAllEmployees().size(), 1);
}