Question

我正在为我的bean编写组件测试，因为来自addMessage()的{{1}}方法，我不断获得NullPointerExceptions。

我确定这是因为FacesContext方法，因为如果我删除测试通过的行。如何模拟addMessage()方法？

TrendBean

addMessage()

TrendBeanTest

@Named(value = "trendBean")
@ViewScoped
@SuppressWarnings("deprecation")
public class TrendBean extends AbstractBean implements Serializable {

private static final long serialVersionUID = -310401000218411384L;

private static final Logger logger = Logger.getLogger(TrendBean.class);

private ChartPoint point;

private List<ChartPoint> points;

@Inject
private ITrendManager manager;


public String addChartPoint() {
     if (!isLoggedIn()) {
        return null;
     }
     assertNotNull(point);
     final User user = getSession().getUser();
     manager.addPointToUser(user, point);
     FacesContext.getCurrentInstance().addMessage(
            null,
            new FacesMessage(FacesMessage.SEVERITY_INFO,
                getTranslation("pointAdded"), ""));
     init();
     return null;
     }
 }

AbstractBean

public class TrendBeanTest {

@Tested
TrendBean trendBean;
@Injectable
LoginBean loginBean;
@Injectable
Session session;
@Injectable
ITrendManager manager;
@Injectable
IUserManager userManager;
@Injectable
User user;

@Test
public void testAddChartPoint(@Mocked FacesContext fakeContext) {

    new NonStrictExpectations() {

        {
            session.isLoggedIn();
            result = true;
            session.getUser();
            result = user;
            manager.addPointToUser((User) any, (ChartPoint) any);
            FacesContext.getInstance();
            result = fakeContext;
        };
    };

    Deencapsulation.setField(trendBean, "point", new ChartPoint());

    assertEquals(null, trendBean.addChartPoint());

    }
}

Answer 1

在这种情况下，在FacesContext.getCurrentInstance().addMessage的调用内部，您也调用AbstractBean .getTranslation(String)，您还需要模拟该方法。

这样的事情：

<强> TrendBeanTest

public class TrendBeanTest {

@Tested
TrendBean trendBean;
@Injectable
LoginBean loginBean;
@Injectable
Session session;
@Injectable
ITrendManager manager;
@Injectable
IUserManager userManager;
@Injectable
User user;

@Test
public void testAddChartPoint(@Mocked FacesContext fakeContext, @Mocked AbstractBean abstractBean) {

    new NonStrictExpectations() {

        {
            session.isLoggedIn();
            result = true;
            session.getUser();
            result = user;
            manager.addPointToUser((User) any, (ChartPoint) any);
            FacesContext.getInstance();
            result = fakeContext;
            abstractBean.getMessage(anyString); result = "foo";
        };
    };

    Deencapsulation.setField(trendBean, "point", new ChartPoint());

    assertEquals(null, trendBean.addChartPoint());

    new Verifications(){{
        fakeContext.addMessage(withNull(), (FacesMessage)any); 
    }};
}
}

注意：我是在没有IDE的情况下从头开始做的，所以也许我已经改写了一些东西。

来自FacesContext的Jmockit模拟addMessage方法

1 个答案: