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フラグメントマネージャーに関連付けられていないフラグメント

Navigation Componentを使用して、1つのアクティビティと複数のフラグメントを持つアプリのインストゥルメンテーションテストをいくつか書いています。

私のスプラッシュスクリーンのコードは次のとおりです。

class SplashFragment : Fragment(), KodeinAware {

    override val kodein by Admin.instance.kodein

    private var realm: Realm? = null

    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
        return inflater.inflate(R.layout.splash, container, false)
    }

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

        (activity as? AppCompatActivity)?.supportActionBar?.hide()

        realm = Realm.getInstance(RealmUtil.realmConfig)

        val result = realm!!.where<User>().findFirst()
        val user = if (result != null) realm!!.copyFromRealm(result) else null

        Handler().postDelayed({
            if (user == null)
                findNavController().navigate(R.id.action_splashFragment_to_loginFragment) //navigate to login screen if no user exists
            else
                findNavController().navigate(R.id.action_splashFragment_to_businessListFragment) //navigate to business list if user already logged in
        }, 2000)
    }

    override fun onDestroy() {
        super.onDestroy()

        realm?.close()
    }
}

スプラッシュスクリーンの後に来るフラグメントをテストしようとしていますが、次のエラーが発生し続けます。

Java.lang.IllegalStateException: Fragment SplashFragment{a1ca381 (5f5b98ae-c130-4e9b-9b77-0495561ef4f5)} not associated with a fragment manager.
at androidx.fragment.app.Fragment.requireFragmentManager(Fragment.Java:891)
at androidx.navigation.fragment.NavHostFragment.findNavController(NavHostFragment.Java:106)
at androidx.navigation.fragment.FragmentKt.findNavController(Fragment.kt:29)
at com.chargebot.collect.admin.fragment.onboarding.SplashFragment$onViewCreated$1.run(SplashFragment.kt:44)
at Android.os.Handler.handleCallback(Handler.Java:873)
at Android.os.Handler.dispatchMessage(Handler.Java:99)
at androidx.test.espresso.base.Interrogator.loopAndInterrogate(Interrogator.Java:148)
at androidx.test.espresso.base.UiControllerImpl.loopUntil(UiControllerImpl.Java:519)
at androidx.test.espresso.base.UiControllerImpl.loopUntil(UiControllerImpl.Java:478)
at androidx.test.espresso.base.UiControllerImpl.injectKeyEvent(UiControllerImpl.Java:201)
at androidx.test.espresso.base.UiControllerImpl.injectString(UiControllerImpl.Java:357)
at androidx.test.espresso.action.TypeTextAction.perform(TypeTextAction.Java:108)
at androidx.test.espresso.ViewInteraction$SingleExecutionViewAction.perform(ViewInteraction.Java:360)
at androidx.test.espresso.ViewInteraction.doPerform(ViewInteraction.Java:251)
at androidx.test.espresso.ViewInteraction.access$100(ViewInteraction.Java:64)
at androidx.test.espresso.ViewInteraction$1.call(ViewInteraction.Java:157)
at androidx.test.espresso.ViewInteraction$1.call(ViewInteraction.Java:154)
at Java.util.concurrent.FutureTask.run(FutureTask.Java:266)
at Android.os.Handler.handleCallback(Handler.Java:873)
at Android.os.Handler.dispatchMessage(Handler.Java:99)
at Android.os.Looper.loop(Looper.Java:193)
at Android.app.ActivityThread.main(ActivityThread.Java:6669)
at Java.lang.reflect.Method.invoke(Native Method)
at com.Android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.Java:493)
at com.Android.internal.os.ZygoteInit.main(ZygoteInit.Java:858)

私のテストクラスは次のとおりです。

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

    @get: Rule
    val login = ActivityScenarioRule(Home::class.Java)

    @Test
    fun loginWithoutEmail_ShouldDisplayError() {
        val scenario = launchFragmentInContainer<LoginFragment>()

        onView(withId(R.id.password)).perform(typeText("samplePassword"), closeSoftKeyboard())
        onView(withId(R.id.login)).perform(click())

        onView(withId(com.google.Android.material.R.id.snackbar_text)).check(matches(withText(R.string.enter_email)))
    }

    @Test
    fun loginWithoutPassword_ShouldDisplayError() {
        val scenario = launchFragmentInContainer<LoginFragment>()

        onView(withId(R.id.email)).perform(typeText("[email protected]"), closeSoftKeyboard())
        onView(withId(R.id.login)).perform(click())

        onView(withId(com.google.Android.material.R.id.snackbar_text)).check(matches(withText(R.string.enter_password)))
    }
}

前述のエラーが原因で、テスト関数が実行されません。スプラッシュ画面で実行したテストが正常に実行されたため、例外の原因は何ですか？

私のnav_graphは次のとおりです：

<?xml version="1.0" encoding="utf-8"?>
<navigation 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"
    Android:id="@+id/nav_graph"
    app:startDestination="@id/splashFragment">

    <fragment
        Android:id="@+id/splashFragment"
        Android:name="com.chargebot.collect.admin.fragment.onboarding.SplashFragment"
        Android:label="SplashFragment"
        tools:layout="@layout/splash">
        <action
            Android:id="@+id/action_splashFragment_to_loginFragment"
            app:destination="@id/loginFragment"
            app:popUpTo="@+id/splashFragment"
            app:popUpToInclusive="true" />
        <action
            Android:id="@+id/action_splashFragment_to_businessListFragment"
            app:destination="@id/businessListFragment"
            app:popUpTo="@+id/splashFragment"
            app:popUpToInclusive="true" />
    </fragment>
    <fragment
        Android:id="@+id/registrationFragment"
        Android:name="com.chargebot.collect.admin.fragment.onboarding.RegistrationFragment"
        Android:label="RegistrationFragment"
        tools:layout="@layout/registration">
        <action
            Android:id="@+id/action_registrationFragment_to_businessListFragment"
            app:destination="@id/businessListFragment"
            app:popUpTo="@+id/registrationFragment"
            app:popUpToInclusive="true" />
        <action
            Android:id="@+id/action_registrationFragment_to_loginFragment"
            app:destination="@id/loginFragment"
            app:popUpTo="@+id/registrationFragment"
            app:popUpToInclusive="true" />
    </fragment>
    <fragment
        Android:id="@+id/loginFragment"
        Android:name="com.chargebot.collect.admin.fragment.onboarding.LoginFragment"
        Android:label="LoginFragment"
        tools:layout="@layout/login">
        <action
            Android:id="@+id/action_loginFragment_to_businessListFragment"
            app:destination="@id/businessListFragment"
            app:popUpTo="@+id/loginFragment"
            app:popUpToInclusive="true" />
        <action
            Android:id="@+id/action_loginFragment_to_registrationFragment"
            app:destination="@id/registrationFragment"
            app:popUpTo="@+id/loginFragment"
            app:popUpToInclusive="true" />
    </fragment>
    <fragment
        Android:id="@+id/businessListFragment"
        Android:name="com.chargebot.collect.admin.fragment.business.BusinessListFragment"
        Android:label="BusinessListFragment"
        tools:layout="@layout/businesses_list">
        <action
            Android:id="@+id/action_businessListFragment_to_newBusinessFragment"
            app:destination="@id/newBusinessFragment" />
        <action
            Android:id="@+id/action_businessListFragment_to_branchesFragment"
            app:destination="@id/branchesFragment" />
    </fragment>
    <fragment
        Android:id="@+id/newBusinessFragment"
        Android:name="com.chargebot.collect.admin.fragment.business.NewBusinessFragment"
        Android:label="NewBusinessFragment"
        tools:layout="@layout/add_business_layout">
        <action
            Android:id="@+id/action_newBusinessFragment_to_businessListFragment"
            app:destination="@id/businessListFragment" />
    </fragment>
    <fragment
        Android:id="@+id/branchesFragment"
        Android:name="com.chargebot.collect.admin.fragment.branch.BranchesFragment"
        Android:label="BranchesFragment"
        tools:layout="@layout/branches_layout">
        <action
            Android:id="@+id/action_branchesFragment_to_transactionsFragment"
            app:destination="@id/transactionsFragment" />
        <action
            Android:id="@+id/action_branchesFragment_to_newBranchFragment"
            app:destination="@id/newBranchFragment" />
        <action
            Android:id="@+id/action_branchesFragment_to_collectorsFragment"
            app:destination="@id/collectorsFragment" />
    </fragment>
    <fragment
        Android:id="@+id/transactionsFragment"
        Android:name="com.chargebot.collect.admin.fragment.transactions.TransactionsFragment"
        Android:label="TransactionsFragment"
        tools:layout="@layout/transactions" />
    <fragment
        Android:id="@+id/newBranchFragment"
        Android:name="com.chargebot.collect.admin.fragment.branch.NewBranchFragment"
        Android:label="NewBranchFragment"
        tools:layout="@layout/add_branch_layout" />
    <fragment
        Android:id="@+id/collectorsFragment"
        Android:name="com.chargebot.collect.admin.fragment.collector.CollectorsFragment"
        Android:label="CollectorsFragment"
        tools:layout="@layout/client_list_layout">
        <action
            Android:id="@+id/action_collectorsFragment_to_newCollectorFragment"
            app:destination="@id/newCollectorFragment" />
        <action
            Android:id="@+id/action_collectorsFragment_to_transactionsFragment"
            app:destination="@id/transactionsFragment" />
        <action
            Android:id="@+id/action_collectorsFragment_to_collectorTransactions"
            app:destination="@id/collectorTransactions" />
    </fragment>
    <fragment
        Android:id="@+id/newCollectorFragment"
        Android:name="com.chargebot.collect.admin.fragment.collector.NewCollectorFragment"
        Android:label="NewCollectorFragment"
        tools:layout="@layout/new_client_layout" />
    <fragment
        Android:id="@+id/collectorTransactions"
        Android:name="com.chargebot.collect.admin.fragment.transactions.CollectorTransactionsFragment"
        Android:label="CollectorTransactions"
        tools:layout="@layout/transaction_layout">
        <action
            Android:id="@+id/action_collectorTransactions_to_collectorsFragment"
            app:destination="@id/collectorsFragment"
            app:popUpTo="@id/collectorsFragment" />
    </fragment>

</navigation>
androidandroid-fragmentsandroid-espressoandroid-architecture-navigationinstrumented-test
14
Alex Kombo

あなたのコードの下にコメント

_Handler().postDelayed({ 
   if (user == null) 
      findNavController().navigate(R.id.action_splashFragment_to_loginFragment) 
      //navigate to login screen if no user exists 
   else
      findNavController().navigate(R.id.action_splashFragment_to_businessListFragment) 
      //navigate to business list if user already logged in 
}, 2000)
_

それがうまくいくなら

Thread.sleep(5000)またはIdlingResourceを使用して、インストルメンテーションテストケースを遅延させます。

根本的な原因：実際には、テストケースの実行中に、ハンドラーで2000ミリ秒間実行を待機しているフラグメントを操作しようとしています。

1
The VOYOU