spring结合mockito

转载：https://blog.csdn.net/apexlj/article/details/50298029

mockito可模拟依赖对象的行为，从而简化跨类的测试。

maven获取mockito：

<dependency>
    <groupId>org.mockito</groupId>
    <artifactId>mockito-all</artifactId>
    <version>1.10.19</version>
</dependency>

以下例：

1. 被测类：ConnInfoService
2. 依赖类：ConnInfoAccessor

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = "/conf/test-context.xml")
public class ConnInfoServiceTest {

    @Autowired
    @InjectMocks
    private ConnInfoService connInfoService;

    @Mock
    private ConnInfoAccessor connInfoAccessor;

    @Before
    public void before() throws Exception {
        MockitoAnnotations.initMocks(this);
    }

    /**
     * Method: getConnInfo(String connId)
     */
    @Test
    public void testGetConnInfo() throws Exception {
        GPSConnInfo gpsConnInfo = new GPSConnInfo();
        gpsConnInfo.setAppKey("appKey");
        gpsConnInfo.setGpsNodeId("node1");
        when(connInfoAccessor.getConnInfo("connId")).thenReturn(gpsConnInfo);
        Assert.assertEquals(gpsConnInfo, connInfoService.getConnInfo("connId"));
    }

    /**
     * Method: saveConnInfo(String connId, GPSConnInfo gpsConnInfo)
     */
    @Test(expected = GPSServiceException.class)
    public void testSaveConnInfo() throws Exception {
        GPSConnInfo gpsConnInfo = new GPSConnInfo();
        gpsConnInfo.setAppKey("appKey");
        gpsConnInfo.setGpsNodeId("node1");
        doThrow(new DataAccessException("e") {
            @Override
            public String getMessage() {
                return super.getMessage();
            }
        }).when(connInfoAccessor).saveConnInfo("connId", gpsConnInfo);
        connInfoService.saveConnInfo("connId", gpsConnInfo);
    }

1. @InjectMocks用于标识被测对象，从而把由@mock表示的依赖对象自动注入到被测对象中
2. @Mock用于表示依赖对象
3. MockitoAnnotations.initMocks(this);用于初始化以上注入动作
4. when(connInfoAccessor.getConnInfo("connId")).thenReturn(gpsConnInfo)用于模拟带返回值的getConnInfo方法的处理
5. doThrow(new DataAccessException("e") { 
@Override 
public String getMessage() { 
return super.getMessage(); 
} 
}).when(connInfoAccessor).saveConnInfo("connId", gpsConnInfo);用于模拟无返回值的saveConnInfo方法抛出异常的行为