assertThrows(NullPointerException.class, () -> new ShareEnumIterator(parent, null, null));
        }

        @Test
        @DisplayName("Null parent with non-empty iterator causes NullPointerException during adapt")
        void nullParent_throwsNPE() {
            List<FileEntry> entries = Collections.singletonList(entry("x", SmbConstants.TYPE_SHARE));