Testing that button starts an Activity with Robolectric

Question

Hi I have the following code:

@RunWith(Test9Runner.class)
public class MainActivityTest 
{
    private MainActivity activity;
    private Button pressMeButto         


        

Answer 1

Updating this for 3.1.2 as the answers above did not work for me:-

    loginButton.callOnClick();

    Intent startedIntent = shadowOf(activity).getNextStartedActivity();
    ShadowIntent shadowIntent = shadowOf(startedIntent);
    assertEquals(NextActivity.class, shadowIntent.getIntentClass()); 

Answer 2

Use Robolectric's StartedMatcher

@RunWith(Test9Runner.class) 
public class MainActivityTest  {
    private MainActivity activity;
    private Button pressMeButton;

    @Before
    public void setUp() throws Exception 
    {
        activity = new MainActivity();
        activity.onCreate(null);
        pressMeButton = (Button) activity.findViewById(R.id.button1);
    }

    @Test
    public void shouldStartNextActivityWhenButtonIsClicked() 
    {
        pressMeButton.performClick();
        assertThat(activity, new StartedMatcher(NextActivity.class));
    }  
}

Answer 3

James Neville's answer works on 4.3. However, I used the AndroidX API, Espresso and Kotlin:

// scenario initialization is done in @Before setUp method, I did it here for brevity
val scenario = ActivityScenario.launch(MainActivity::class.java)

@Test fun test() {
    onView(withId(R.id.button_id)).perform(click())

    scenario.onActivity { activity ->
        val intent = shadowOf(activity).nextStartedActivity
        val shadowIntent = shadowOf(intent)

        assertEquals(SearchResultsActivity::class.java, shadowIntent.intentClass)
    }
}

Answer 4

This is how does it looks like for the Robolectric 3

        // Click on the image view
    mShareLocationImageView.performClick();

    // Check the startActivityForResult for ShareUserLocationActivity has been triggered
    ShadowActivity shadowActivity = Shadows.shadowOf(mChatWindowsActivity);
    Intent intent = shadowActivity.peekNextStartedActivityForResult().intent;
    assertThat(intent).hasComponent(new ComponentName(mChatWindowsActivity, ShareUserLocationActivity.class));

Answer 5

Inspired by @MichK's answer, here is a complete running test using the buildActivity method chain from Robolectric 2.2+:

@Test
public void testStartScheduleActivity() {
    HomeScreenActivity homeActivity = Robolectric.buildActivity(HomeScreenActivity.class).create().start().visible().get();
    ShadowActivity shadowHome = Robolectric.shadowOf(homeActivity);
    Button btnLaunchSchedule = (Button) homeActivity.findViewById(R.id.btnLaunchSchedule);
    Robolectric.clickOn(btnLaunchSchedule);

    assertThat(shadowHome.peekNextStartedActivityForResult().intent.getComponent(), equalTo(new ComponentName(homeActivity, ScheduleActivity.class)));
}

Answer 6

@Before
public void setUp() throws Exception {
    mMainActivity = Robolectric.buildActivity(MainActivity.class)
            .create().start().visible().get();

    shadowActivity =Shadows.shadowOf(mMainActivity);
    hourlyButton = (Button) mMainActivity.findViewById(R.id.hourlyButton);
}
@Test
public void hourlyActivityButtonTest() throws Exception {

   Thread.sleep(5000);
    hourlyButton.performClick();
    Intent intent = shadowActivity.peekNextStartedActivityForResult().intent;
    assertThat(intent.getComponent()).isEqualTo(new ComponentName(mMainActivity, HourlyForecastActivity.class));

}