https://developer.android.com/training/dependency-injection/hilt-testing#launchfragment

HiltExt.kt

/*
 * Copyright (C) 2019 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import android.content.ComponentName
import android.content.Intent
import android.os.Bundle
import androidx.annotation.StyleRes
import androidx.core.util.Preconditions
import androidx.fragment.app.Fragment
import androidx.test.core.app.ActivityScenario
import androidx.test.core.app.ApplicationProvider

/**
 * launchFragmentInContainer from the androidx.fragment:fragment-testing library
 * is NOT possible to use right now as it uses a hardcoded Activity under the hood
 * (i.e. [EmptyFragmentActivity]) which is not annotated with @AndroidEntryPoint.
 *
 * As a workaround, use this function that is equivalent. It requires you to add
 * [HiltTestActivity] in the debug folder and include it in the debug AndroidManifest.xml file
 * as can be found in this project.
 */
inline fun <reified T : Fragment> launchFragmentInHiltContainer(
    fragmentArgs: Bundle? = null,
    @StyleRes themeResId: Int = R.style.FragmentScenarioEmptyFragmentActivityTheme,
    crossinline action: Fragment.() -> Unit = {}
) {
    val startActivityIntent = Intent.makeMainActivity(
        ComponentName(
            ApplicationProvider.getApplicationContext(),
            HiltTestActivity::class.java
        )
    ).putExtra(
        "androidx.fragment.app.testing.FragmentScenario.EmptyFragmentActivity.THEME_EXTRAS_BUNDLE_KEY",
        themeResId
    )

    ActivityScenario.launch<HiltTestActivity>(startActivityIntent).onActivity { activity ->
        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

/*
 * Copyright (C) 2019 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

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

@AndroidEntryPoint
class HiltTestActivity : AppCompatActivity()