1、使用junit測試

@RunWith(MockitoJUnitRunner.class)    // 使用註解或者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整合springboot測試

@SpringBootTest(classes = Springapplication22.class)    //springboot啟動類，依靠啟動類找掃描springcontext的bean
@RunWith(SpringRunner.class)
public class testJunitIntegration {

    @Autowired
    ApplicationContext context;
    
    @MockBean       //從容器找到bean，並且把mockbean替換舊的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整合springboot測試

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

    @Autowired
    ApplicationContext context;

    @MockBean
    @Autowired         //先從容器裡取得bean，再mockbean替換
    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);

    }

}