@Test
public void shouldHandleSingleItemIterators() throws Exception {
// Given
ResourceIterator<Long> it1 = asResourceIterator(iterator(1l));
ResourceIterator<Long> it2 = asResourceIterator(iterator(5l, 6l, 7l));
CombiningResourceIterator<Long> combingIterator =
new CombiningResourceIterator<>(iterator(it1, it2));
// When I iterate through it, things come back in the right order
assertThat(IteratorUtil.asList(combingIterator), equalTo(asList(1l, 5l, 6l, 7l)));
}
@Test
public void shouldNotCloseDuringIteration() throws Exception {
// Given
ResourceIterator<Long> it1 = spy(asResourceIterator(iterator(1l, 2l, 3l)));
ResourceIterator<Long> it2 = spy(asResourceIterator(iterator(5l, 6l, 7l)));
CombiningResourceIterator<Long> combingIterator =
new CombiningResourceIterator<>(iterator(it1, it2));
// When I iterate through it, things come back in the right order
assertThat(IteratorUtil.asList(combingIterator), equalTo(asList(1l, 2l, 3l, 5l, 6l, 7l)));
// Then
verify(it1, never()).close();
verify(it2, never()).close();
}