@Mock 对象返回 null

Question

所以我有下面的代码-

@RunWith(MockitoJUnitRunner.class)
public class TeamSubscriptionServiceTest {

    @InjectMocks
    private TeamSubscriptionService teamSubscriptionService;

    @Mock
    private ImsCustomerProfileService imsService;

    @Mock
    private IUserService userService;

    @Mock
    private HttpRequestService httpRequestService;

    @Mock
    private ISubscriptionDbService subscriptionDbService;

    private String imsToken = "IMS_Token";

    @Before
    public void setup() {
        MockitoAnnotations.initMocks(this);
        when(imsService.getAccessToken()).thenReturn(imsToken);
        ReflectionTestUtils.setField(teamSubscriptionService, "jilEndpoint", "www.testJil.com");
        ReflectionTestUtils.setField(teamSubscriptionService, "adobeIOApiKey", "api_key");
    }


    @Test(groups = { TestGroup.UNIT_TESTS })
    public void testAddSeat() throws IOException {

        String teamId = "TestTeamID";
        String locale = "En_US";
        String jasonValue = "TestJasonData";
        String apiCallContent = "addSeatAPIResult";

        HttpResponse addSeatResponse  = mock(HttpResponse.class);
        when(addSeatResponse.getCode()).thenReturn(200);
        when(addSeatResponse.getContent()).thenReturn(apiCallContent);

        HttpServletResponse response = mock(HttpServletResponse.class);
        when(httpRequestService.makeHttpRequest(anyString(),anyString(),anyMap(),anyString())).thenReturn(addSeatResponse);

        String result = teamSubscriptionService.addSeat(teamId,locale,jasonValue,response);
        assertNotNull(result);
        assertEquals(result, "addSeatAPIResult");
    }
}

当我测试它时，我在行上得到一个 NullPointerException

when(httpRequestService.makeHttpRequest(anyString(),anyString(),anyMap(),anyString())).thenReturn(addSeatResponse);

我觉得所有用@Mock 注释的对象都不知何故为空，并且该对象没有被注入到 teamSubscriptionService 对象中。

知道代码有什么问题吗？

Answer 1

问题在于您正在混合使用 TestNG 和 JUnit 注释。

Test 方法用 @Test(groups = { TestGroup.UNIT_TESTS }) 注释 - 这显然是一个 TestNG 注释 @org.testng.annotations.Test，因为 JUnit 的等价物没有名为 groups 的元素。

但是，您在 setup() 方法上使用了 JUnit 的 @Before 注释，因此永远不会调用此方法。此注释的等效 TestNG 是 @org.testng.annotations.BeforeTest。改用它。

<...>
import org.mockito.InjectMocks;
import org.mockito.Mock;
import org.mockito.MockitoAnnotations
import org.testng.annotations.BeforeTest;
import org.testng.annotations.Test;
<...>

public class TeamSubscriptionServiceTest {
    @InjectMocks
    private TeamSubscriptionService teamSubscriptionService;
    @Mock
    private ImsCustomerProfileService imsService;
    @Mock
    private IUserService userService;
    @Mock
    private HttpRequestService httpRequestService;
    @Mock
    private ISubscriptionDbService subscriptionDbService;

    private String imsToken = "IMS_Token";

    @BeforeTest
    public void setup() {
        MockitoAnnotations.initMocks(this);
        <...>
    }

    @Test(groups = { TestGroup.UNIT_TESTS })
    public void testAddSeat() throws IOException {
        <...>
    }
}

附带说明，@RunWith(MockitoJUnitRunner.class) 在使用 TestNG 时也是多余的。