### Question:
RegistrationLevelManagementImpl implements RegistrationLevelManagementService { @Override public CommonResult getRegistrationLevelById(Short id) { RegistrationLevel registrationLevel = registrationLevelMapper.get(id); return CommonResult.success(registrationLevel); }  @Override CommonResult getRegistrationLevelById(Short id); @Override CommonResult insertRegistrationLevel(RegistrationLevel registrationLevel); @Override CommonResult updateRegistrationLevelById(RegistrationLevel registrationLevel); @Override CommonResult deleteRegistrationLevelById(Short id); @Override CommonResult listAllRegistrationLevels();  }### Answer:
@Test public void testGetRegistrationLevelById() throws Exception { }