我正在尝试使用Android Jetpack导航组件和片段测试库来测试片段交互。我的应用程序使用Java + Dagger2作为DI。
为了测试导航，我创建了一个JUnit测试：
@Test
public void testNavigationToLoginFragment() {
// Create a mock NavController
NavController mockNavController = mock(NavController.class);
// Create a graphical FragmentScenario for the Intro Fragment
FragmentScenario<IntroFragment> introFragmentScenario = FragmentScenario.launchInContainer(IntroFragment.class);
// Set the NavController property on the fragment
introFragmentScenario.onFragment(fragment ->
Navigation.setViewNavController(fragment.requireView(), mockNavController)
);
// Verify that performing a click prompts the correct Navigation action
onView(withId(R.id.button_login)).perform(click());
verify(mockNavController).navigate(R.id.action_intro_fragment_to_login_fragment);
}
[每当我运行测试时，都会出现以下错误：
java.util.concurrent.ExecutionException: java.lang.IllegalArgumentException: No injector factory bound for Class<XXX>
如何将片段插入其中？是否可以在FragmentScenario中使用DaggerFragments？
IntroFragment
public class IntroFragment extends DaggerFragment{
@Inject
CreateQuoteRecyclerViewAdapter createQuoteRecyclerViewAdapter;
@Inject
public ViewModelProvider.Factory factory;
@inject
public MyViewModel viewModel;
.....
}
MyViewModel.java
class CreateOrSignInViewModel extends BaseViewModel() {
@Inject
public CreateOrSignInBindingState state;
......
}
在测试类中声明以下函数：
@Config(application = TestApp::class)
@RunWith(AndroidJUnit4::class)
@LooperMode(LooperMode.Mode.PAUSED)
class MyFragmentTest {
private val createQuoteRecyclerViewAdapter: CreateQuoteRecyclerViewAdapter = mock()
private val viewModel: MyViewModel = mock()
private fun launchFragment(): FragmentScenario<MyFragment> {
return launchFragmentInContainer(factory = object : FragmentFactory() {
override fun instantiate(classLoader: ClassLoader, className: String): Fragment {
return MyFragment().apply {
createQuoteRecyclerViewAdapter = [email protected]
viewModel = [email protected]
// assign other deps here as per your needs
}
}
}, themeResId = R.style.AppTheme)
}
}
TestApp声明为：
class TestApp : Application()
为了避免错误，可能需要这样做，而这将发生在您的自定义应用程序类的onCreate()方法中，该方法正在构造Dagger树。
完成此设置后，您可以开始编写单元测试：
@Test
fun `navigation to login screen is correctly performed`() {
val navController: NavController = mock()
val scenario = launchFragment()
scenario.onFragment {
Navigation.setViewNavController(it.requireView(), navController)
}
onView(withId(R.id.button_login)).perform(click())
verify(mockNavController).navigate(R.id.action_intro_fragment_to_login_fragment)
}