@Test
public void listNews() throws Exception {

    TestSubscriber<List<Event>> subscriber = TestSubscriber.create();
    userDataSource.listNews("TellH", 1).subscribe(subscriber);
    List<List<Event>> onNextEvents = subscriber.getOnNextEvents();
    assertNotNull(onNextEvents);
    assertTrue(onNextEvents.size() == 1);
    System.out.println(onNextEvents.get(0).toString());
}