PowerMock whenNew Problem On Spring Component Constructor答案

【问题标题】：PowerMock whenNew Problem On Spring Component ConstructorPowerMock whenNew Problem On Spring Component Constructor
【发布时间】：2020-07-10 01:34:52
【问题描述】：

我有一个如下的 Spring 服务：

@Service
public class SendWithUsService
{
    private SendWithUs mailAPI;

    public SendWithUsService()
    {
        this.mailAPI = new SendWithUs();
    }

    public void sendEmailEvent(Dto data)
    {
        try
        {
            SendWithUsSendRequest request = new SendWithUsSendRequest()...;
            mailAPI.send(request);
        }
        catch (Exception e)
        {
           ...
        }
    }
}

我的测试代码如下所示：

@RunWith(PowerMockRunner.class)
@PowerMockIgnore({"javax.net.ssl.*"})
@PrepareForTest(SendWithUsService.class)
public class SendWithUsServiceTest
{
    @InjectMocks
    private SendWithUsService sendWithUsService;

    @Mock
    private SendWithUs mailAPI;

    @Test
    public void sendEmailEvent_successfully() throws Exception
    {
        whenNew(SendWithUs.class).withAnyArguments().thenReturn(mailAPI);
        Dto emailData = ...;
        sendWithUsService.sendEmailEvent(emailData);
        ...
    }
}

在这里，PowerMock whenNew 方法不起作用。但是当我在构造函数之外调用它时，比如在 sendEmailEvent 方法中，它会被触发。

有办法处理吗？

作品：

public void sendEmailEvent(Dto data)
{
   this.mailAPI = new SendWithUs();
    ...
}

无效：

 public SendWithUsService()
    {
        this.mailAPI = new SendWithUs();
    }

【问题讨论】：

标签： spring-boot junit powermock powermockito spring-boot-test

【解决方案1】：

我已经解决了如下：

@RunWith(PowerMockRunner.class)
@PowerMockIgnore({"javax.net.ssl.*"})
@PrepareForTest(SendWithUsService.class)
public class SendWithUsServiceTest
{
    @InjectMocks
    private SendWithUsService sendWithUsService;

    @Mock
    private SendWithUs mailAPI;

    @Before
    public void setUp() throws Exception {   
      whenNew(SendWithUs.class).withAnyArguments().thenReturn(mailAPI);
        MockitoAnnotations.initMocks(this);
    }

    @Test
    public void sendEmailEvent_successfully() throws Exception
    {
        Dto emailData = ...;
        sendWithUsService.sendEmailEvent(emailData);
        ...
    }
}

【讨论】：