@Test
public void testRefresh_resetsTimelineCursors() {
delegate = new TimelineDelegate<>(mockTimeline);
delegate.timelineStateHolder.setNextCursor(new TimelineCursor(ANY_POSITION, ANY_POSITION));
delegate.timelineStateHolder.setPreviousCursor(new TimelineCursor(ANY_POSITION, ANY_POSITION));
delegate.refresh(null);
assertNull(delegate.timelineStateHolder.positionForNext());
assertNull(delegate.timelineStateHolder.positionForPrevious());
}
@Test
public void testPrevious_addsItems() {
final Timeline<TestItem> fakeTimeline =
new FakeItemTimeline(NUM_ITEMS, ANY_POSITION, ANY_POSITION);
delegate = new TimelineDelegate<>(fakeTimeline, mockObservable, null);
delegate.refresh(null);
// refresh loads latest items (notifyChange)
delegate.previous();
// assert items are added and notifyChanges is called again
assertEquals(2 * NUM_ITEMS, delegate.getCount());
verify(mockObservable, times(2)).notifyChanged();
}
@Test
public void testRefresh_replacesItems() {
// refresh replaces initial items
final Timeline<TestItem> fakeTimeline =
new FakeItemTimeline(NUM_ITEMS, ANY_POSITION, ANY_POSITION);
delegate = new TimelineDelegate<>(fakeTimeline, mockObservable, testItems);
assertEquals(testItems, delegate.itemList);
delegate.refresh(null);
// assert that items were replaced and notifyChanged called
assertEquals(NUM_ITEMS, delegate.itemList.size());
verify(mockObservable).notifyChanged();
}
@Test
public void testGetNonLastItem_doesNotLoadPrevious() {
final Timeline<TestItem> fakeTimeline =
new FakeItemTimeline(NUM_ITEMS, ANY_POSITION, ANY_POSITION);
delegate = new TimelineDelegate<>(fakeTimeline, mockObservable, null);
delegate.refresh(null);
// refresh loads latest items (notifyChange)
verify(mockObservable).notifyChanged();
assertEquals(NUM_ITEMS, delegate.getCount());
delegate.getItem(1);
// assert no items added and notifyChanged is not called again
assertEquals(NUM_ITEMS, delegate.getCount());
verify(mockObservable, times(1)).notifyChanged();
}
@Test
public void testRefresh_callsNextForLatest() {
delegate = new TimelineDelegate<>(mockTimeline);
delegate.refresh(null);
verify(mockTimeline).next(isNull(Long.class), any(TimelineDelegate.NextCallback.class));
}
