@Test
public void setFetchCount() {
int newFetchCount = timeline.getFetchCount() + 1;
timeline.setFetchCount(newFetchCount);
assertEquals(newFetchCount, timeline.getFetchCount());
}
@Test
public void setFetchCountExceedsLowerBound() {
int tooSmall = FETCH_COUNT_LOWER_BOUND - 1;
Throwable actual = thrownBy(() -> timeline.setFetchCount(tooSmall));
assertNotNull(actual);
assertTrue(actual instanceof IllegalArgumentException);
assertTrue(actual.getMessage().contains(valueOf(tooSmall)));
assertEquals(format(ERROR_EXCEEDS_LOWER_BOUND, tooSmall), actual.getMessage());
}
@Test
public void fetchFirstItemsWithoutTopItemToRecover() throws IOException {
itemProvider.addItems(FIRST_ITEM, SECOND_ITEM, THIRD_ITEM, FOURTH_ITEM);
timeline.setFetchCount(2);
timeline.fetchItems();
List<Item> actual = timeline.getItems();
assertArrayEquals(new Item[] {FOURTH_ITEM, THIRD_ITEM}, actual.toArray(new Item[2]));
verify(sessionStorage).storeTop(FOURTH_ITEM);
}
@Test
public void fetchItems() {
itemProvider.addItems(FIRST_ITEM, SECOND_ITEM, THIRD_ITEM, FOURTH_ITEM, FIFTH_ITEM, SIXTH_ITEM);
timeline.setFetchCount(2);
timeline.fetchItems();
timeline.fetchItems();
List<Item> actual = timeline.getItems();
assertArrayEquals(
new Item[] {SIXTH_ITEM, FIFTH_ITEM, FOURTH_ITEM, THIRD_ITEM}, actual.toArray(new Item[2]));
}