TestIterator iterator = new TestIterator(null);

        assertFalse(iterator.hasNext());
        assertNull(iterator.next());
    }

    @Test
    @DisplayName("Close delegates to underlying iterator")
    void closeDelegation() throws CIFSException {
        when(delegate.hasNext()).thenReturn(false);

        TestIterator iterator = new TestIterator(null);

            return new TestIterator(th, parent, wildcard, filter, searchAttributes);
        }

        private TestIterator(SmbTreeHandleImpl th, SmbResource parent, String wildcard, ResourceNameFilter filter, int searchAttributes)
                throws CIFSException {
            super(th, parent, wildcard, filter, searchAttributes);
        }

        TestIterator throwOnOpen() {

@SuppressWarnings("JUnit4ClassUsedInJUnit3")
@NullMarked
public class CollectionIteratorTester<E extends @Nullable Object>
    extends AbstractCollectionTester<E> {
  public void testIterator() {
    List<E> iteratorElements = new ArrayList<>();
    for (E element : collection) { // uses iterator()
      iteratorElements.add(element);
    }