@Test
public void retrieveEventFeedCallsNetwork() {

    List<Event> events = mock(List.class);
    when(network.retrieveEventFeed()).thenReturn(Observable.just(events));
    TestSubscriber<List<Event>> ts = new TestSubscriber<>();
    tapglue.retrieveEventFeed().subscribe(ts);
    assertThat(ts.getOnNextEvents(), hasItems(events));
}