Enable Fragment constructor injection for instrumentation tests when using Hilt. This is a modified version of https://github.com/android/architecture-samples/blob/dev-hilt/app/src/androidTest/java/com/example/android/architecture/blueprints/todoapp/HiltExt.kt

AndroidManifest.xml

<!-- **NOTE** This must be in /debug/ -->
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.codingwithmitch.daggerhiltplayground">

    <application>
        <activity
            android:name="com.codingwithmitch.daggerhiltplayground.HiltTestActivity"
            android:exported="false"  />
    </application>

</manifest>

HiltExt.kt

inline fun <reified T : Fragment> launchFragmentInHiltContainer(
    fragmentArgs: Bundle? = null,
    @StyleRes themeResId: Int = R.style.FragmentScenarioEmptyFragmentActivityTheme,
    factory: FragmentFactory,
    crossinline action: Fragment.() -> Unit = {}
) {
    val startActivityIntent = Intent.makeMainActivity(
        ComponentName(
            ApplicationProvider.getApplicationContext(),
            HiltTestActivity::class.java
        )
    ).putExtra(EmptyFragmentActivity.THEME_EXTRAS_BUNDLE_KEY, themeResId)

    ActivityScenario.launch<HiltTestActivity>(startActivityIntent).onActivity { activity ->
        activity.supportFragmentManager.fragmentFactory = factory
        val fragment: Fragment = activity.supportFragmentManager.fragmentFactory.instantiate(
            Preconditions.checkNotNull(T::class.java.classLoader),
            T::class.java.name
        )
        fragment.arguments = fragmentArgs

        activity.supportFragmentManager
            .beginTransaction()
            .add(android.R.id.content, fragment, "")
            .commitNow()

        fragment.action()
    }
}

HiltTestActivity.kt

import androidx.appcompat.app.AppCompatActivity
import dagger.hilt.android.AndroidEntryPoint

// **NOTE** This must be in /debug/
@AndroidEntryPoint
class HiltTestActivity : AppCompatActivity()