oaviad

// yeah, still written Java
public class InboxActivity extends Activity {

  private InboxViewModel viewModel;

  @Override
  public View onCreate(Bundle savedInstanceState) {
    viewModel = new ViewModelProvider(this).get(InboxViewModel.class);       
    viewModel.getInboxLiveData().observe(this, this::handleInboxData);       
    viewModel.loadInbox();

oaviad

    val retrofitClient = RetrofitClient.getInstance()

    private suspend fun getInbox(): GetInboxResponse? = suspendCoroutine {

        val call = retrofitClient.getInbox()

        call.enqueue(object : Callback<GetInboxResponse> {
            override fun onResponse(call: Call<GetInboxResponse>, response: Response<GetInboxResponse>) {
                it.resume(response.body())
            }

oaviad

@Entity(tableName = "inbox", indices = [Index(value = ["uid"], unique = true)])
data class Message @JvmOverloads constructor(
  @PrimaryKey(autoGenerate = true) @ColumnInfo(name = _id) val id: Long?,
  @ColumnInfo(name = timestamp) val timestamp: Long	
  @ColumnInfo(name = uid) val uid: Long,
  @ColumnInfo(name = is_read, defaultValue = "0") val isRead: Int = 0
  @ColumnInfo(name = text) val text: String?	
)

@Database(entities = arrayOf(Message::class), version = 2)

oaviad

    @Test
    fun `when calling loadInbox, then update inboxLiveData with empty messages list`() {

        val messages = emptyList<MessageEntity>()

        runBlocking {
            whenever(messagesRepository.getMessages(any(), any())).thenReturn(messages)
            inboxViewModel.loadInbox().join()
            getValue(inboxViewModel.inboxLiveData).let {
                assertThat(it).isEqualTo(messages)

oaviad

android {
  defaultConfig {
   ...
   testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"

   // The following argument makes the Android Test Orchestrator run its
   // "pm clear" command after each test invocation. This command ensures
   // that the app's state is completely cleared between tests.
   testInstrumentationRunnerArguments clearPackageData: 'true'
 }

oaviad

// How to get your current Activity
fun getCurrentActivity(): Activity? {
    var currentActivity: Activity? = null
    getInstrumentation().runOnMainSync { run { currentActivity = ActivityLifecycleMonitorRegistry.getInstance().getActivitiesInStage(Stage.RESUMED).elementAtOrNull(0) } }
    return currentActivity
}

// Example: how to use it
assertThat(getCurrentActivity(), instanceOf(MyActivity::class.java))

oaviad

@get:Rule
val rule = activityScenarioRule<MyActivity>()
@Test void myTest() {
  val scenario = rule.getScenario();
  // Your test code goes here.
}

oaviad

// Implementation of custum viewAction for click() Action
val noConstraintsClickAction = object : ViewAction {

    override fun getDescription(): String {
        return "noConstraintsClickAction"
    }

    override fun getConstraints(): Matcher<View> {
        return isEnabled() // no constraints
    }

oaviad

@LargeTest
@RunWith(AndroidJUnit4::class)
class NotificationTest {

    @get:Rule
    val rule = activityScenarioRule<MainActivity>()
    
    val device = UiDevice.getInstance(getInstrumentation())

    @Test

oaviad

dependencies {
    ...
    androidTestImplementation 'androidx.test.uiautomator:uiautomator:2.2.0'
}