@Test
public void retrieveFollowersReturnsUsersFromService() {

    when(usersFeed.getUsers()).thenReturn(users);
    when(service.retrieveFollowers()).thenReturn(Observable.just(usersFeed));
    TestSubscriber<RxPage<List<User>>> ts = new TestSubscriber<>();
    network.retrieveFollowers().subscribe(ts);
    List<User> result = ts.getOnNextEvents().get(0).getData();
    assertThat(result, equalTo(users));
}