mockito 学习

mocket 中常用操作的代码和注解对等操作 

相关对等操作
code	anotation	note
@Before public void init() { MockitoAnnotations.initMocks(this); }	@RunWith(MockitoJUnitRunner.class) public class MockitoAnnotationTest { ... }	用于启用mockito
List mockList = Mockito.mock(ArrayList.class);	@Mock List<String> mockedList;	mock出的对象，并不会真正执行对应的方法
List<String> spyList = Mockito.spy(new ArrayList<String>());	@Spy List<String> spiedList = new ArrayList<String>();	spy出的对象，是会真正执行的
ArgumentCaptor<String> arg = ArgumentCaptor.forClass(String.class);	@Captor ArgumentCaptor argCaptor;	@Mock List mockedList; @Captor ArgumentCaptor argCaptor; @Test public void whenUseCaptorAnnotation_thenTheSam() { mockedList.add("one"); Mockito.verify(mockedList).add(argCaptor.capture()); assertEquals("one", argCaptor.getValue()); }

 

@InjectMocks的用法

如果你在mock StatusDao的时候希望自动注入mock出client做为属性，那么可以在statusDao增加@InjectMocks

public class StatusDAO{
    @Autowired 
    private CosmosClient client;
    
    public void markApproved(Document doc) {
        client.executeStoredProcedure(getCollectionURI(), "markApproved", doc);
    }
}

@RunWith(MockitoJUnitRunner.class)
public class StatusDAOTest{

    @Spy
    @InjectMocks
    StatusDAO statusDAO;

    @Mock
    CosmosClient client = new CosmosClient();
    @Mock
    Document document;
    @Spy
    StatusDocument statusDocument = new StatusDocument();

    @Before
    public void setup() {
        Mockito.doReturn(document).when(client).executeStoredProcedure(Mockito.anyString(), Mockito.anyString(),Mockito.any(StatusDocument.class));
    }
}

 

InvalidUseOfMatchersException解决

org.mockito.exceptions.misusing.InvalidUseOfMatchersException: 

Invalid use of argument matchers!
3 matchers expected, 1 recorded:

    @Test
    public void testMarkNotApproved() {
        Mockito.doReturn(document).when(client).executeStoredProcedure(getURI(), Mockito.anyString(),statusDocument);
        statusDAO.markNotApproved(creditStatusDocument);
        Mockito.verify(client,Mockito.times(1)).executeStoredProcedure(getURI(), Mockito.anyString(), statusDocument);
    }

原因： executeStoreProcedure方法的mock中，第一个和第三个参数没有使用ArgumentMatchers，而第二个参数使用了ArgumentMatchers，这个是不行的，要么都适用ArgumentMatchers，要么都不用，比如改成都不用：

    @Test
    public void testMarkNotApproved() {
        Mockito.doReturn(document).when(client).executeStoredProcedure(getURI(), "xxx",statusDocument);
        statusDAO.markNotApproved(creditStatusDocument);
        Mockito.verify(client,Mockito.times(1)).executeStoredProcedure(getURI(), "xxx",statusDocument);
    }