Mockito：Java-未完成的stubbing检测

Question

org.mockito.exceptions.misusing.UnfinishedStubbingException: 
Unfinished stubbing detected here:
-> at       com.rbc.rewards.catalogue.service.B2SServicesTest.getProductList_Success(B2SServ icesTest.java:52)

E.g. thenReturn() may be missing.
Examples of correct stubbing:
  when(mock.isOk()).thenReturn(true);
  when(mock.isOk()).thenThrow(exception);
  doThrow(exception).when(mock).someVoidMethod();
Hints:
  1. missing thenReturn()
  2. you are trying to stub a final method, you naughty developer!
  3: you are stubbing the behaviour of another mock inside before 'thenReturn' instruction if completed

我在两篇关于堆栈溢出的文章中读到过关于这个问题的文章，但它们没有详细说明。我相信这与在嘲笑中嵌套嘲笑有关（根据我读到的）。然而，我并没有看到或完全理解人们张贴的小片段。

我的测试类如下所示（省略了不必要的代码）：

// Mock:  uses Java Reflection in order to create mock objects of each class
@Mock
private Scrapes scrapeS;
@Mock
private SsoS ssoS;
@Mock
private BScrape bScrape;

//@InjectMocks annotation is used to create and inject the mock object
@Mock
private BService bService;


@Before
public void setUp() throws Exception {
    MockitoAnnotations.initMocks(this);
}

// Testing:
@Test
public void getProductList_Success() throws Exception{

        when(BService.getProductList("cookie", "6753"))
                .thenReturn(
                scrapeS.scrapePost(new String(),
                        new String(),
                        new HashMap<>(),
                        new bService()));
}

我需要调用的方法：

public List<prodItem> getProdList(String raw_cookie, String catId) throws Exception {
    String url = ssoSetting.getUrls().BProductList();
    String post = "url" + catId +"url";
    BScrape scraper = new BScrape ();
    Map<String, String> postRequest = new HashMap();
    postRequest.put("searchRequestParams", post);
    return scrapeS.scrapePost(url, raw_cookie, postRequest, scraper);
}

@Mock
private SSetting sSetting = new SSetting ();
// Mock:  uses Java Reflection in order to create mock objects and is injected into InjectMocks
@Mock
private ProdItem productItem = new ProdItem ();
@Mock
private sService scrapeService = new sService ();
@Mock
private BScrape bScrape ;

//@InjectMocks annotation is used to create and inject the mock object
@InjectMocks
private BService bService = new BService ();

@Before
public void setUp() throws Exception {
    MockitoAnnotations.initMocks(this);
}

// Testing:
@Test
public void getProductList_Success() throws Exception{

    List<ProductItem> retList = new ArrayList<>();
    retList.add(new ProductItem());
    retList.add(new ProductItem());

    //try{
    when(b2SServices.getProductList("cookie", "6753")).thenCallRealMethod();

    //test the add functionality
    when(BService .getProdList("cookie", "6753")).thenReturn(retList);


    }catch(Exception exception){
        System.out.println(exception);
    }
}

Answer 1

您处于第三种情况：

3：如果完成的话，在“然后返回”指令之前，您正在插入另一个模拟的行为

发生这种情况是因为thenReturn从另一个模拟调用方法Scrapes.ScrapePost。很难确切地说如何修复这个问题，因为我需要更多的实现细节，但是尝试在之前构建返回对象，当时，它不应该是另一个模拟的返回。这里有一个很好的解释:https://stackoverflow.com/a/26319364/1121883

@Test
public void play(){
    A a = mock(A.class);
    B b = mock(B.class);
    when(a.a("input")).thenReturn(b.b("input"));
}

@Test
public void fix(){
    A a = mock(A.class);
    B b = mock(B.class);
    String returnString = "b";
    when(a.a("input")).thenReturn(returnString);
}

static class A{
    String a(String in){
        return "a";
    }
} 

static class B{
    String b(String in){
        return "b";
    }
}

    List<prodItem> retList = new ArrayList<>();
    retList.add(new ProdItem());
    retList.add(new ProdItem());
    when(bService.getProductList("cookie", "6753")).thenReturn(retList);