1、使用junit测试

@RunWith(MockitoJUnitRunner.class)    // 使用注解或者initMocks  注入mock
public class TestJunit {

    @Mock
    TestDao testDao;

    @InjectMocks
    TestService testService;

   /* @Before
    public  void initMock(){
        MockitoAnnotations.initMocks(this);
    }*/

    @Test
    public void test1() {
        when(testDao.Insert()).thenReturn("test");

        String s = testService.insert();
        System.out.println(s);
    }
}

2、使用junit集成springboot测试

@SpringBootTest(classes = Springapplication22.class)    //springboot启动类，依靠启动类找扫描springcontext的bean
@RunWith(SpringRunner.class)
public class testJunitIntegration {

    @Autowired
    ApplicationContext context;

    @MockBean       //从容器找到bean，并且把mockbean替换旧的bean
    TestDao testDao;

    @Autowired
    TestService te;


    @Test
    public void test1() {
//        TestService testService1 = (TestService)context.getBean(TestService.class);
        when(testDao.Insert()).thenReturn("test");
//        String insert = testService1.insert();

        String s = te.insert();
        System.out.println(s);
    }

}

3、使用Testng集成springboot测试

@SpringBootTest(classes = Springapplication22.class)
//@ContextConfiguration
public class testngt2  extends AbstractTestNGSpringContextTests{       

    @Autowired
    ApplicationContext context;

    @MockBean
    @Autowired         //先从容器里取得bean，再mockbean替换
    TestDao testDao;

    @Autowired
    TestService testService;



    @Test
    public void test1() {
//        TestService testService1 = (TestService)context.getBean(TestService.class);
        when(testDao.Insert()).thenReturn("test");

        String insert1 = testService.insert();
        System.out.println(insert1);

    }

}