Example with Espresso intercepting Intent

public static Intent getCallingIntent(Context context, ArrayList<GalleryPhoto> imagesOnDevice) {
    Intent intent = new Intent(context, GalleryActivity.class);
    intent.putParcelableArrayListExtra(EXTRA_IMAGES_ON_DEVICE, imagesOnDevice);
    return intent;
}

...

@Test
public void someTest() {
	Instrumentation.ActivityResult result = getActivityResult(dataFakeForActivity);

    intending(hasExtra(GalleryActivity.EXTRA_IMAGES_ON_DEVICE)).respondWith(result);

    onView(withId(R.id.gallery)).perform(click());
}