我有一个测试,用于检查活动是否通过视图模型正确地从存储库获取数据。
@Config(application = TestApplication::class)
@RunWith(RobolectricTestRunner::class)
@LooperMode(LooperMode.Mode.PAUSED)
class BusinessTests {
private lateinit var viewModel: BusinessCollectionViewModel
private lateinit var activity: BusinessCollectionVerticalActivity
private lateinit var observer: Observer<Triple<NetworkState, PagedList<Edge<Business>>, TimeTracking?>>
@Before
fun setUp() {
observer = mock()
}
@Test
fun givenBusinessMock_whenVerticalCollection_thenBusinessVerticalWith2Items() {
val activityScenario = ActivityScenario.launch(BusinessCollectionVerticalActivity::class.java)
activityScenario.onActivity {
activity = it
}
viewModel = ViewModelProviders.of(activity)[BusinessCollectionViewModel::class.java]
viewModel.data.observeForever(observer)
assert(viewModel.data.value?.second?.size == 2)
}
}
问题在于测试总是失败,但在调试时却通过了,但当我使用假条件进行断言调试时,会出现以下异常。
java.lang.Exception: Main looper has queued unexecuted runnables. This might be the cause of the test failure. You might need a shadowOf(getMainLooper()).idle() call.
这是一种非常奇怪的行为,我不知道该怎么办。当然,在观察之前我尝试过添加shadowOf(getMainLooper()).idle()。
我正在使用最新的robolectric 4.3版本,这可能是一个bug吗?