android - 如何测试由 Activity 处理的片段导航

Question

我想测试由 MainActivity 处理的片段导航。

为此我创建了HomeFragmentTest课程

@MediumTest
@RunWith(AndroidJUnit4::class)
class HomeFragmenTest {

  @Rule
  @JvmField
  val mockitoRule: MockitoRule = MockitoJUnit.rule()

  @Test
  fun onUsersButtonClick_navigateUsersListFragmet() {
    val navController = mock(NavController::class.java)

    val fragScenario = launchFragmentInContainer<UsersListFragment>()

    fragScenario.onFragment {
        Navigation.setViewNavController(it.requireView(), navController)
    }

    onView(withId(R.id.usersButton))
      .perform(click())

    verify(navController).navigate(R.id.usersListFragment)
  }
  
}

运行测试调用按钮单击操作，然后viewModel调用将事件发布到MainActivity. MainActivity 观察到这个事件并调用navControllernavigate 方法

viewModel.navAction.observe(this, { direction ->
   navController?.navigate(direction)
})

问题是我的测试失败了

Wanted but not invoked:
navController.navigate(2131296591);
Actually, there were zero interactions with this mock.