Espresso startActivity, which depends on the intention

Question

I have the following situation.

My activity has a fragment dependent on 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 cannot convey the intention of the activity before it was created. I tried with setActivityIntent in several ways, but cannot 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 searched a lot, but nothing works. MyObject always null in the test. I think it should be easy. What am I missing?

Answer 1

You can determine 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); //... } } 

Answer 2

You can override the ActivityTestRule.getActivityIntent () method and return the desired intent:

 @Rule public ActivityTestRule<MyActivity> mActivityRule = new ActivityTestRule<MyActivity>(MyActivity.class){ @Override protected Intent getActivityIntent() { Intent intent = new Intent(); intent.putExtra("myobj", myObj); return intent; } }; 

Answer 3

It doesn't look like you are really starting an activity somewhere.

Try calling getActivity() on the first line of testName ().

This will launch the action you passed to the super constructor.