Mockito错误-与这个模拟Android没有任何交互

Question

我被通缉了，但没有被征召。CheckFingerPrintWhenTouchidEnabled()方法在行Verify(fingerPrintHelper，times(1)).InitializeFingerPrint(any())；处与此模拟错误没有任何交互。甚至我也嘲弄了这个对象&在调试initializeFingerprint(..)函数时被调用。

下面是我要测试的函数,

@RequiresApi(Build.VERSION_CODES.M)
public void checkFingerPrint() {
    if (fingerPrintHelper.isDeviceReadyForFingerPrint()) {
        boolean isFingerPrintEnable = sharedPreference.getBoolean(SpKeys.KEY_FINGER_PRINT, false);
        if (isFingerPrintEnable) {
            fingerPrintHelper.initializeFingerPrint(this);
        }
    } else {
        sharedPreference.putBoolean(SpKeys.KEY_FINGER_PRINT, false).commit();
    }
}

public class LoginActivity extends AppCompatActivity {
public FingerPrintHelper fingerPrintHelper;
ActivityLoginBinding binding;
private LoginViewModel loginViewModel;
private SharedPreferenceManager sharedPreferenceManager;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    this.requestWindowFeature(Window.FEATURE_NO_TITLE);
    sharedPreferenceManager = new SharedPreferenceManager(getApplicationContext(), SpKeys.MY_SP);
    fingerPrintHelper = new FingerPrintHelper(this);
    binding = DataBindingUtil.setContentView(this, R.layout.activity_login);
    loginViewModel = ViewModelProviders.of(this).get(LoginViewModel.class);
    binding.setViewModel(loginViewModel);
    binding.setLifecycleOwner(this);

    checkFingerPrint();
}


@RequiresApi(Build.VERSION_CODES.M)
public void checkFingerPrint() {
    if (fingerPrintHelper.isDeviceReadyForFingerPrint()) {
        boolean isFingerPrintEnable = sharedPreferenceManager.getBoolean(SpKeys.KEY_FINGER_PRINT, false);
        if (isFingerPrintEnable) {
            fingerPrintHelper.initializeFingerPrint(this);
        }
    } else {
        sharedPreferenceManager.setBoolean(SpKeys.KEY_FINGER_PRINT, false);
    }
}
}

public class LoginActivityTest {

LoginActivity loginActivity;
@Mock
FingerPrintHelper fingerPrintHelper;
@Rule
public ActivityTestRule<LoginActivity> loginActivityRule = new ActivityTestRule<>(
        LoginActivity.class);
Context context;

@Before
public void setUp() {
    MockitoAnnotations.initMocks(this);
    loginActivity = loginActivityRule.getActivity();
    context = getInstrumentation().getTargetContext();
}

@Test
public void checkFingerPrintWhenTouchIdDisabled() {

    SharedPreferences sharedPreferences = context.getSharedPreferences(SpKeys.MY_SP, Context.MODE_PRIVATE);
    when(fingerPrintHelper.isDeviceReadyForFingerPrint()).thenReturn(false);
    loginActivity.checkFingerPrint();
    Assert.assertFalse(sharedPreferences.getBoolean(SpKeys.KEY_FINGER_PRINT, false));
    verify(fingerPrintHelper, never()).initializeFingerPrint(any());

}
@Test
public void checkFingerPrintWhenTouchIdEnabled() {

    SharedPreferences sharedPreferences = context.getSharedPreferences(SpKeys.MY_SP, Context.MODE_PRIVATE);
    SharedPreferences.Editor preferencesEditor = sharedPreferences.edit();
    when(fingerPrintHelper.isDeviceReadyForFingerPrint()).thenReturn(true);
    preferencesEditor.putBoolean(SpKeys.KEY_FINGER_PRINT, true).commit();

    loginActivity.checkFingerPrint();

    /* Below verification for `initializeFingerPrint()` is throwing error as,
    Actually, there were zero interactions with this mock. error,
    Even I have mock the object & while debugging the method is getting invoked also.
    If I debug my code it calls this function but in test cases it shows above error
    */
    verify(fingerPrintHelper, times(1)).initializeFingerPrint(any());
}
}

Answer 1

尝试以下操作手动设置模拟（不使用注释）：

@Before
public void setUp() {
    loginActivity = loginActivityRule.getActivity();
    loginActivity.fingerPrintHelper = Mockito.mock(FingerPrintHelper.class);
    // ...
}

如果loginactivy以前可以成功创建，那么您现在就不会遇到问题。
和fingerprinthelper似乎是public所以很容易设置。
但是如果您想正确地进行操作，您可以提供一个设置器。

或者您希望保留注释以创建fingerprinthelper。

@Mock
FingerPrintHelper fingerPrintHelper;

@Before
public void setUp() {
    MockitoAnnotations.initMocks(this);
    loginActivity = loginActivityRule.getActivity();
    loginActivity.fingerPrintHelper = fingerPrintHelper;
    // ...
}

所以您唯一能做的就是手动将mock传递给正在测试的对象。