How to test void method?

public void checkAlreadyUsedOrValidHealthDashBoardToken(ServiceCode serviceCode) {
    if(serviceCode.getHealthDashBoardToken().isEmpty()) {
        return;
    } else if(isAlreadyUsedHealthDashBoardToken(serviceCode)) {
        throw new GlobalException(ResponseType.SERVICE_ALREADY_USED_HEALTH_DASHBOARD_TOKEN);
    } else if(!isValidHealthDashBoardToken(serviceCode)) {
        throw new GlobalException(ResponseType.SERVICE_NOT_VALID_HEALTH_DASHBOARD_TOKEN);
}
}

@Test(expected = GlobalException.class)
public void checkAlreadyUsedOrValidHealthDashBoardTokenTest() {
    List<ServiceCode> serviceCodeList = new ArrayList<ServiceCode>();
    serviceCodeList.add(serviceCode);

    Mockito.when(serviceManageMapper.selectServiceByHashBoardToken((ServiceCode)notNull())).thenReturn(serviceCodeList);
    // execute test
}

I just want to test void method. how can I execute the test? Please help me.