Espresso startActivity that depends on Intent

Question

I have the following situation.

My activity has a fragment that depends of a Serializable Object. Here is my onCreate:

@Override protected void onCreate(Bundle savedInstanceState) {     super.onCreate(savedInstanceState);      MyObject myObj = (MyObj) getIntent().getSerializableExtra("myobj");      if(myObj != null) {         FragmentManager manager = getSupportFragmentManager();         FragmentTransaction transaction = manager.beginTransaction();         transaction.add(R.id.container, MyFragment.newInstance(myObj));         transaction.commit();     } } 

But in my Espresso test I simply can't pass the intent to the activity before it's created. I tried with setActivityIntent in several ways but cant figure out how to make it work.

Here is my last attempt:

import android.content.Intent; import android.support.test.InstrumentationRegistry; import android.support.test.espresso.Espresso; import android.test.ActivityInstrumentationTestCase2; import org.junit.Before;  import static android.support.test.espresso.assertion.ViewAssertions.matches; import static android.support.test.espresso.matcher.ViewMatchers.withId; import static android.support.test.espresso.matcher.ViewMatchers.withText;  public class MyActivityTest extends       ActivityInstrumentationTestCase2<MyActivity> {          private MyActivity activity;         private MyObject myObj;          public MyActivityTest() {             super(MyActivity.class);         }          @Before         protected void setUp() throws Exception {             super.setUp();             injectInstrumentation(InstrumentationRegistry.getInstrumentation());             myObj = MyObject.mockObject();             Intent i = new Intent();             i.putExtra("myobj", myObj);             setActivityIntent(i);          }          public void testName(){             Espresso.onView(withId(R.id.name)).check(matches(withText(myObj.getObjName())));         }      } 

I've searched a lot but nothing works. MyObject is always null in the test. I think this should be simple. What am I'm missing?

Answer 1

You can define the Intent to be used in this way

@RunWith(AndroidJUnit4.class) public class MyActivityTestTest {      private MyObject myObj;      @Rule     // third parameter is set to false which means the activity is not started automatically     public ActivityTestRule<MyActivity> mActivityRule =         new ActivityTestRule<>(MyActivity.class, false, false);       @Test     public void testName() {            myObj = MyObject.mockObject();           Intent i = new Intent();           i.putExtra("myobj", myObj);           mActivityRule.launchActivity(i);           //...     }  }