assertThrows(NullPointerException.class, () -> SmbEnumerationUtil.list(null, "*", 0, null, null));
        }

        @Test
        @DisplayName("listFiles with null root throws NullPointerException")
        void listFiles_withNullRoot_throwsNpe() {
            // Intent: null root is invalid input
            assertThrows(NullPointerException.class, () -> SmbEnumerationUtil.listFiles(null, "*", 0, null, null));
        }

                    throw se;
                }
            }
        }

        try (CloseableIterator<SmbResource> it = SmbEnumerationUtil.doEnum(src, "*",
                SmbConstants.ATTR_DIRECTORY | SmbConstants.ATTR_HIDDEN | SmbConstants.ATTR_SYSTEM, null, null)) {
            while (it.hasNext()) {
                try (SmbResource r = it.next()) {