test onCreate but setup activity's field before

[droidguyg1]

My NoteView activity in onCreate uses a helper class. I want to test that it calls the helper class correctly. How do I write a robospock test for it? My best shot is:

def "should ..."() {
    when:
    def bundle = new Bundle().putLong(NotesDbAdapter.KEY_ROWID,11)
    def dbHelper = Mock(INotesDbAdapter);
    // Need to call this before onCreate() is called:  activity.setDatabaseHelper(dbHelper)
    def activity = Robolectric.buildActivity(NoteView).create(bundle).get()

    then:
    ... I check here that the dbHelper was called correctly...
}

[pjakubczyk]

One of the easiest ways is to use DI (RoboGuice or Dagger). It will provide you API to provide a test object while you're creating the activity. Otherwise you'd need split object creation and object calling in onStart and onCreate so Robolectric could give a window where to assign a DB mock to your activity.