呼叫mock物件的方法時，不會執行真實的方法，而是傳回類型的預設值，如object回傳null, int回傳0等，否則透過指定when (方法).thenReturn(value)來指定方法的回傳值。同時mock物件可以進行追蹤，使用verify方法看是否已經被呼叫過。而spy對象，預設會執行真實方法，返回值可以透過when.thenReturn進行覆寫。可見mock只要避開了執行一些方法，直接回傳指定的值，方便做其他測試。
需要的依賴
junit junit 4.12 test org.mockito mockito-core 2.23.4 test org.springframework.boot spring-boot-test 2.1.13.RELEASE
程式碼範例
@RunWith(MockitoJUnitRunner.class)
@SpringBootTest()
public class StudentServiceTest {
@InjectMocks
StudentService studentService = new StudentServiceImpl();
@Mock
StudentDAO studentDAO;
@Before
public void before(){
Mockito.doReturn(new StudentDO("张三", 18)).when(studentDAO).read(Mockito.anyString());
}
@Test
public void testRead(){
StudentDO read = studentService.read("");
Assert.assertNotNull(read);
}
}需要的依賴
org.springframework spring-test 5.1.14.RELEASE com.jayway.jsonpath json-path 2.4.0
程式碼範例
@RunWith(MockitoJUnitRunner.class)
@SpringBootTest()
public class StudentControllerTest {
@Resource
MockMvc mockMvc;
@InjectMocks
StudentController studentController;
@Mock
StudentService studentService;
@Before
public void before() {
mockMvc = MockMvcBuilders.standaloneSetup(studentController).build();
Mockito.doReturn(new StudentDO("张三", 18)).when(studentService).read(Mockito.anyString());
}
@Test
public void testRead() throws Exception {
MockHttpServletRequestBuilder request = MockMvcRequestBuilders.get("/student/read/1");
mockMvc.perform(request)
.andDo(print())
.andExpect(status().isOk())
.andExpect(jsonPath("$.name").value("张三"));
}
}以上是Java單元測試Mockito如何用的詳細內容。更多資訊請關注PHP中文網其他相關文章！
