java - 使用Mockito和Junit时如何 Autowiring Spring bean？

我正在尝试设置要在Junit中使用的类。

但是，当我尝试执行以下操作时，出现错误。

当前测试类别:

public class PersonServiceTest {

    @Autowired
    @InjectMocks
    PersonService personService;

    @Before
    public void setUp() throws Exception
    {
        MockitoAnnotations.initMocks(this);
        assertThat(PersonService, notNullValue());

    }

    //tests

错误:

org.mockito.exceptions.base.MockitoException:
Cannot instantiate @InjectMocks field named 'personService'
You haven't provided the instance at field declaration so I tried to construct the instance.
However the constructor or the initialization block threw an exception : null

我怎样才能解决这个问题？

最佳答案

您没有在代码中 mock 任何东西。 @InjectMocks设置一个将注入(inject)模拟的类。

您的代码应如下所示

public class PersonServiceTest {

    @InjectMocks
    PersonService personService;

    @Mock
    MockedClass myMock;

    @Before
    public void setUp() throws Exception {
        MockitoAnnotations.initMocks(this);
        Mockito.doReturn("Whatever you want returned").when(myMock).mockMethod;


    }

    @Test()
      public void testPerson() {

         assertThat(personService.method, "what you expect");
      }