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);
        iterator.close();

        verify(delegate).close();
    }