java - Android 测试 - Robolectric + Mockito + Retrofit 获取通缉但未调用错误

Question

尝试使用 Robolectric 和 Mockito 在我的 Android 应用程序中测试我的 Retrofit 调用，但我收到以下错误:

Wanted but not invoked: mockApi.register( , ); -> at ServiceTest.testAPI(ServiceTest.java:58) Actually, there were zero interactions with this mock.

RetroFit API 调用在接口(interface)中定义如下:

@FormUrlEncoded
@POST("/register")
void register(
        @FieldMap Map<String, String> registrationParams,
        Callback<JsonObject> response) ;

我的测试类如下:

@Config(constants = BuildConfig.class)
@RunWith(TestRunner.class)
public class SharedServiceTest {

private RegistrationActivity activity;
@Mock
private SharedService mockApi;

@Captor
private ArgumentCaptor<Callback<JsonObject>> cb;


@Before
public void setUp() {

    MockitoAnnotations.initMocks(this);
    ActivityController<RegistrationActivity> controller = Robolectric.buildActivity(RegistrationActivity.class);
    activity = controller.get();

    controller.create();
}

@Test
public void testAPI() throws Exception {

    activity.populateFields();
    activity.validateFields();
    activity.register("");

    Mockito.verify(mockApi).register(Mockito.anyMap(), cb.capture());

    JsonObject jsonObject = new JsonObject();
    jsonObject.addProperty("sessionToken", Mockito.anyString());
    jsonObject.addProperty("userId", Mockito.anyString());

    cb.getValue().success(jsonObject, null);

    Assert.assertTrue(ShadowToast.getTextOfLatestToast().contains("Registration completed"));

}

}

我的RegistrationActivity中使用该API的方法如下:

public void register(){

       MyApplication.getInstance().getSharedService().register(mRegistrationParams, new Callback<JsonObject>() {
            @Override
            public void success(JsonObject jsonObject, retrofit.client.Response response) {
                Toast.makeText(RegistrationActivity.this, "Registration completed", Toast.LENGTH_LONG).show();
            }

            @Override
            public void failure(RetrofitError error) {
                Toast.makeText(RegistrationActivity.this, RetrofitUtils.getErrorMessage(error), Toast.LENGTH_LONG).show();
            }
        });

    }

真正的 Retrofit 服务来 self 自己的应用程序类，我在我的测试文件夹中模拟了它以供 robolectric 使用:

public class TestMyApplication extends MyApplication
        implements TestLifecycleApplication {

    @Override
    public void onCreate() {
        super.onCreate();
    }

    @Override public void beforeTest(Method method) {
    }

    @Override public void prepareTest(Object test) {
    }

    @Override public void afterTest(Method method) {
    }

    @Override public CPSharedService getCPSharedService() {
        return Mockito.mock(SharedService.class);
    }
}

我已经搜索了 SO 上出现此错误的其他问题，但没有一个与我在这里尝试做的相匹配，也没有为我的问题提供解决方案，所以我只是想知道我做错了什么？

Answer 1

TestMyApplication 中 SharedService 的模拟实例与您声明的测试类不同。Mockito.verify(mockApi).register(Mockito.anyMap(), cb.capture()); 失败，因为 mockApi 字段引用的实例实际上从未被调用.另一个问题是 TestMyApplication 中的 getter 总是为每次调用返回一个新的 mock:

    @Override public CPSharedService getCPSharedService() {
        return Mockito.mock(SharedService.class); //this creates a new "mocked" instance 
    }

我不是 100% 清楚你的场景，但如果你能让你的测试在你的 TestMyApplication 实例中设置 mockApi 字段的实例会更好:

public class TestMyApplication extends MyApplication
        implements TestLifecycleApplication {

    private SharedService sharedService;

    @Override
    public void onCreate() {
        super.onCreate();
    }

    @Override public void beforeTest(Method method) {
    }

    @Override public void prepareTest(Object test) {
    }

    @Override public void afterTest(Method method) {
    }

    @Override public CPSharedService getCPSharedService() {
        return this.sharedService;
    }

    public void setCPSharedService(SharedService sharedService) {
        // store your mock
        this.sharedService = sharedService;
    }
}

在你的测试课中:

@Test
public void testAPI() throws Exception  {

    // configure you TestMyApplication
    assertTrue(MyApplication.getInstance() instanceof TestMyApplication);
    TestMyApplication testMyApp = (TestMyApplication) MyApplication.getInstance();
    testMyApp.setCPSharedService(this.mockApi);

    activity.populateFields();
    activity.validateFields();
    activity.register("");

    Mockito.verify(this.mockApi).register(Mockito.anyMap(), cb.capture());

    ...

}