assertFalse(iterator.hasNext(), "Should not have more elements");
    }

    /**
     * Test iterator with filter that accepts all elements.
     */
    @Test
    void testIteratorWithAcceptAllFilter() throws CIFSException {
        // Given
        when(mockDelegate.hasNext()).thenReturn(true, true, false);
        when(mockDelegate.next()).thenReturn(mockFileEntry1, mockFileEntry2);