Android espresso 无法导航到其他 Fragment？

Posted 2023-04-18

【中文标题】Android espresso 无法导航到其他 Fragment？

【英文标题】：Android espresso does not navigate to other Fragment?

【发布时间】：2021-12-27 11:10:07

【问题描述】：

在我的项目中，单击button 时使用NavigationComponenet 打开新片段。我想测试单击按钮时是否打开片段，但它不能正常工作。只有它单击按钮并且不会打开另一个片段。所以，我无法测试它是否有效。为什么它不导航？

@RunWith(androidJUnit4::class)
class WelcomeFragmentTestDoctor 
    val phoneHelper = PhoneHelper
    private lateinit var scenario: FragmentScenario<WelcomeFragment>

    @Before
    fun setup() 
        scenario = launchFragmentInContainer(themeResId = R.style.AppTheme)
        scenario.moveToState(Lifecycle.State.STARTED)
        Intents.init()
    

    @After
    fun tearDown()
        Intents.release()
    



@Test
fun clickApplyAsADoctor()
    val navController = TestNavHostController(
        ApplicationProvider.getApplicationContext())

    scenario.onFragment  fragment ->
        navController.setGraph(R.navigation.auth_navigation)
        Navigation.setViewNavController(fragment.requireView(), navController)
    
    onView(withId(R.id.buttonDoctor)).perform(click())
    Assert.assertEquals(navController.currentDestination?.id, R.id.action_welcomeFragment_to_doctorRegistrationFragment)
    

fragment_doctor_registration.xml

<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools">

    <androidx.constraintlayout.widget.ConstraintLayout
        android:layout_
        android:layout_>

        <androidx.constraintlayout.widget.ConstraintLayout
            android:id="@+id/toolbar"
            android:layout_
            android:layout_
            android:paddingTop="@dimen/_14sdp"
            android:paddingBottom="@dimen/_14sdp"
            app:layout_constraintTop_toTopOf="parent">

            </androidx.constraintlayout.widget.ConstraintLayout>
        </androidx.core.widget.NestedScrollView>

    </androidx.constraintlayout.widget.ConstraintLayout>
</layout>

DoctorRegistrationFragment.kt

class DoctorRegistrationFragment : Fragment() 
    private lateinit var mBinding: FragmentDoctorRegistrationBinding
    private val mViewModel: DoctorRegistrationViewModel by inject()


    override fun onCreate(savedInstanceState: Bundle?) 
        super.onCreate(savedInstanceState)
    

    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? 
        mBinding = FragmentDoctorRegistrationBinding.inflate(inflater, container, false)
        return mBinding.root
    

    override fun onViewCreated(view: View, savedInstanceState: Bundle?) 
        super.onViewCreated(view, savedInstanceState)
        DoctorRegistrationComponent.inject()

        with(mBinding) 
            backButton.setOnCrashOnClickListener 
                findNavController().popBackStack()
            
            btnSend.setOnCrashOnClickListener 
                mViewModel.onEvent(
                    DoctorRegistrationInteractions.RegisterStart(fdr_name.text, fdr_surname.text,
                        fdr_title.text, fdr_diploma.text, fdr_branch.text,
                        inputLogin.lifEdittext.text.toString(), fdr_email.text, fdr_address.text,
                        fdr_company.text, fdr_tax.text

                    ))
            
        

        with(mViewModel) 
            actions.map  it.getContentIfNotHandled() .onEach(::handleActions).launchIn(viewLifecycleOwner.lifecycleScope)
        
    

    private fun handleActions(action: DoctorRegistrationActions) 
        when (action) 
            is DoctorRegistrationActions.ErrorMessage   -> PopupMessage.error(requireActivity(),message = action.message)
            DoctorRegistrationActions.Init              ->  
            is DoctorRegistrationActions.SuccessMessage -> 
                PopupMessage.success(requireActivity(), message = action.message)
                findNavController().popBackStack()
            
        
    

【问题讨论】：

也请分享你的第一个片段代码！

@miladsalimi 我做到了。

请添加 fragment.kt 而不是 XML。

@miladsalimi 好的，我刚刚添加了。

【参考方案1】：

您需要检查fragment id 而不是Action id

Assert.assertEquals(navController.currentDestination?.id, R.id.doctorRegistrationFragment)

假设doctorRegistrationFragment 是导航图中片段标签的id

    <fragment
        android:id="@+id/doctorRegistrationFragment"
        /* rest of attrs */ >

【讨论】：

我试过了。但它不起作用。我从模拟器中得知它没有打开 DoctorRegistrationFragment。所以，它找不到这个idea。