remcomokveld

public class DaggerAppComponent implements AppComponent {
  public class MyActivitySubcomponentImpl implements ActivitySubcomponent {
    public void inject(MyActivity activity) {...}

    public class OnboardingFragmentSubcomponentImpl implements OnboardingFragmentSubcomponent {
      public void inject(OnboardingFragment fragment) { ... }
    }

    public class WelcomeFragmentSubcomponentImpl implements WelcomeFragmentSubcomponent {
      public void inject(WelcomeFragment fragment) { ... }

remcomokveld

@RunWith(AndroidJUnit4::class)
class MyFragmentTest {
  @Test
  fun buttonIsEnabled() {
    TestMyFragment.testViewModel = MyViewModel().also 
      it.updateState(enabled = true)
    }
    launchFragmentInContainer<TestMyFragment>()
    onView(withId(R.id.button)).check(matches(isEnabled()))
  }

remcomokveld

class TestMyFragment : MyFragment() {
  override fun injectMembers() {
   this.viewModel = testViewModel
  }
  companion object {
    // static property can be set before launching the Fragment
    // to a mock instance
    lateinit var testViewModel: MyViewModel
  }
}

remcomokveld

override fun onAttach(context: Context) {
  injectMembers()
  super.onAttach(context)
}
protected open fun injectMembers() = 
  AndroidSupportInjection.inject(this)

remcomokveld

override fun onAttach(context: Context) {
  AndroidSupportInjection.inject(this)
  super.onAttach(context)
}

remcomokveld

@RunWith(AndroidJUnit4::class)
class MyFragmentTest {
  @Test
  fun launchFragment() {
    launchFragmentInContainer<MyFragment>()
  }
}

remcomokveld

import dagger.android.support.DaggerFragment
class MyFragment: DaggerFragment() {
  @Inject lateinit var viewModel: MyViewModel
  override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    viewModel.liveData.observe(this) { button.isEnabled = it }
  }
}

remcomokveld

/*
 * Copyright (C) 2021 Remco Mokveld
 *
 * 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
 *
 *    https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software

remcomokveld

package nl.remcomokveld.firebaseloaders;

import android.content.Context;
import android.support.annotation.NonNull;
import android.support.v4.content.Loader;

import com.google.firebase.database.DataSnapshot;
import com.google.firebase.database.DatabaseError;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.ValueEventListener;

remcomokveld

/*
 * Copyright (C) 2015 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