說(shuō)明

提供幾個(gè)簡(jiǎn)單的例子，說(shuō)明如何利用Mockito + Powermock來(lái)做單元測(cè)試

一、POM 依賴(lài)

<mockito.version>1.10.19</mockito.version>
<powermock.version>1.7.0</powermock.version>

<dependency>
    <groupId>org.powermock</groupId>
    <artifactId>powermock-api-mockito</artifactId>
    <version>${powermock.version}</version>
    <scope>test</scope>
</dependency>

<dependency>
    <groupId>org.powermock</groupId>
    <artifactId>powermock-module-junit4</artifactId>
    <version>${powermock.version}</version>
    <scope>test</scope>
</dependency>

<dependency>
    <groupId>org.powermock</groupId>
    <artifactId>powermock-module-junit4-rule-agent</artifactId>
    <version>${powermock.version}</version>
    <scope>test</scope>
</dependency>

這里mockito 使用1.x版本，powermock使用1.7.0.

二、Mockito+Powermock 實(shí)例

普通service方法

public class StoreServiceImpl implements StoreService {

private OrderDetailMapper detailMapper;

private OfflineOrderReasonService offlineOrderReasonService;

public int insertOrderDetail(OrderDetail orderDetail) {
        int id = 0;
        try {
            id = detailMapper.insert(orderDetail);
        } catch (Exception e) {
            OfflineOrderReasonDO reasonDO = this.convertTo(orderDetail,2,"插入訂單信息異常");
            offlineOrderReasonService.saveOfflineOrderReason(reasonDO);
            LoggerUtil.error(logger, "[INSERT_ORDER_FAIL] msg=orderNo:"+orderDetail.getOrderNo(),"errorMsg:"+e.getMessage(),e);
        }
        return id;
    }

}

單元測(cè)試

第一步 告訴junit使用PowerMockRunner執(zhí)行單元測(cè)試

@RunWith(PowerMockRunner.class)
public class StoreServiceImplTest{

第二步 利用注解mock對(duì)象

@InjectMocks：添加了該注解的對(duì)象的方法是可以進(jìn)入，被執(zhí)行的
@Mock：添加了該注解的對(duì)象所有的屬性和方法都是不可使用的

  @InjectMocks
    StoreServiceImpl storeService;
   @Mock
    private OrderDetailMapper detailMapper;

第三步 初始化mock對(duì)象

   @Before
    public void setUp() {
        // 對(duì)定義了注解對(duì)象進(jìn)行初始化
        MockitoAnnotations.initMocks(this);
        prepareData();
    }

第四步 編寫(xiě)test方法

    @Test
    public void insertOrderDetailTest() {
        PowerMockito.when(detailMapper.insert(orderDetail)).thenReturn(1);

        int id = storeService.insertOrderDetail(orderDetail);

        // 驗(yàn)證是否進(jìn)入了detailMapper.insert
        Mockito.verify(detailMapper).insert(orderDetail);
        // 驗(yàn)證返回是否正確
        Assert.assertEquals(1,id);
    }

   @Test
    public void insertOrderDetailWithExceptionTest() {
        // 執(zhí)行方法時(shí)拋異常
        PowerMockito.when(detailMapper.insert(Mockito.any())).thenThrow(new NullPointerException());
        // void的方法
        PowerMockito.doNothing().when(offlineOrderReasonService).saveOfflineOrderReason(Mockito.any());

        int id = storeService.insertOrderDetail(orderDetail);

        Assert.assertEquals(0,id);
    }