Start Activity for testing

Question

I 've got a Quiz app using Realm db. Every time the user selects an answer she clicks a button and new text for Question appears. Thats it until she reaches the end where I start a new Activity and display a score based on correct answers.

How should I start/test ( with Espresso I guess ) that activity without having to enter manually every time all the answers and click the button after each answer until I reach the last one?

What I need is to pass some mock data to a variable and make an Intent but I dont know how and cant find anything related with this in Espresso

Answer 1

You can launch your next activity with a custom intent like this:

@RunWith(AndroidJUnit4.class) public class NextActivityTest {    @Rule   public ActivityTestRule<NextActivity> activityRule       = new ActivityTestRule<>(         NextActivity.class,         true,     // initialTouchMode         false);   // launchActivity. False to customize the intent    @Test   public void intent() {     Intent intent = new Intent();     intent.putExtra("your_key", "your_value");      activityRule.launchActivity(intent);      // Continue with your test   } } 

Full example: https://github.com/chiuki/android-test-demo

Blog post: http://blog.sqisland.com/2015/04/espresso-21-activitytestrule.html

Answer 2

For Devs using AndroidX for testing, things are a bit changed.

This is an example UI Test case for testing whether my intended activity opens after clicking on the textview.

import androidx.lifecycle.Lifecycle import androidx.test.core.app.ActivityScenario import androidx.test.espresso.Espresso.onView import androidx.test.espresso.action.ViewActions import androidx.test.espresso.intent.Intents import androidx.test.espresso.intent.Intents.intended import androidx.test.espresso.intent.matcher.IntentMatchers.hasComponent import androidx.test.espresso.matcher.ViewMatchers.withId import com.softway.dhananjay.tournamentapp.tournament.TournamentActivity import org.junit.Test  class MainActivityTest {      @Test     fun tournament_activity_starts_onClick_of_textView() {          Intents.init()          val activityScenario: ActivityScenario<MainActivity> =             ActivityScenario.launch(MainActivity::class.java)           activityScenario.moveToState(Lifecycle.State.RESUMED)          onView(withId(R.id.startTextView)).perform(ViewActions.click())          intended(hasComponent(TournamentActivity::class.java.name))          Intents.release()          activityScenario.moveToState(Lifecycle.State.DESTROYED)      } }