Mockito ClassNotFoundException for Android classes

Question

我正在尝试对使用SharedPrefrences的片段和活动进行一些单元测试，以及其他相关类别。但是，当我尝试像以下那样模拟这些时，我似乎总是会得到ClassNotFound例外：

ClassNotFoundException: android.content.Context

这是一个示例：

我的" timerfragment"包含一个" mynotificationmanager"类。

@RunWith(MockitoJUnitRunner.class)
public class TimerFragmentUnitTest {
    @Mock
    TimerFragmentView view;
    @Mock
    MyNotificationManger notificationManger;

    private TimerFragmentPresenter presenter;
    @Before
    public void setUp(){
        presenter = new TimerFragmentPresenter(notificationManger);
        presenter.bindView(view);
    }
    @Test
    public void shouldSendNotification() throws Exception{
        //Given
        doNothing().when(view).setStopEnabled(false);
        doNothing().when(view).setStopEnabled(true);
        //When
        presenter.setMinutesAndSeconds(2000);
        TimeUnit.MILLISECONDS.sleep(3000);
        //Then
        verify(notificationManger,times(1)).sendTimerFinishNotification();

    }
}

在此示例中，我遇到了ClassNotFoundException: android.content.Context错误，因为MyNotificationManager中有一个Context对象。

任何建议都将不胜感激。

谢谢。

这是MyNotificationTimer

的实现

    public class MyNotificationManger {
        private static final String EXTRA_NOTIFICATION_TIMER = "notification_timer";
        private static final int TIMER_NOTIFICATION_ID = 1;
        private final Context _context;
        public MyNotificationManger(Context context) {
            _context = context;
        }
        public void sendTimerFinishNotification() {
            int icon = Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP ? R.mipmap.ic_launcher : R.drawable.methodegg;
            Notification.Builder builder =
                    new Notification.Builder(_context)
                            .setSmallIcon(icon)
                            .setContentTitle(_context.getString(R.string.timer))
                            .setContentText(_context.getString(R.string.ready))
                            .setSound(RingtoneManager.getDefaultUri(RingtoneManager.TYPE_ALARM))
                            .setAutoCancel(true);
            Intent resultIntent = new Intent(_context, NavigationActivity.class);
            resultIntent.putExtra(EXTRA_NOTIFICATION_TIMER, true);
            PendingIntent resultPendingIntent = PendingIntent.getActivity(
                    _context,
                    0,
                    resultIntent,
                    PendingIntent.FLAG_UPDATE_CURRENT);
            builder.setContentIntent(resultPendingIntent);

            NotificationManager notificationManager = (NotificationManager) _context.getSystemService(Context.NOTIFICATION_SERVICE);
            notificationManager.notify(TIMER_NOTIFICATION_ID, builder.getNotification());
        }
    }

Answer 1

设法找到了答案，尽管Android文档似乎认为该解决方案应仅用作为'最后的度假胜地'。我把

android {
    testOptions {
        unitTests.returnDefaultValues = true
    }
}

在顶级build.gradle。

根据文档，如果我发现Bizare的'If you run a test that calls an API from the Android SDK that you do not mock'，则应使用此功能，因为我没有遇到'Method ... not mocked'错误，我正在获得'ClassNotFoundException'