public static <T> PreviousHelper<T> expectPreviousElements(
BidirectionalIterator<T> iterator, T... elements) {
for (T element : elements) {
assertTrue(iterator.hasPrevious());
assertEquals(element, iterator.previous());
}
return new PreviousHelper<T>(iterator);
}
public void withNoPrevious() {
assertFalse(iterator.hasPrevious());
}