// Test with null groups
        user = new TestFessUser("testuser", new String[] {}, null, new String[] {});
        assertNull(user.getGroupNames());

        // Test with groups containing spaces
        groups = new String[] { "group one", "group two" };
        user = new TestFessUser("testuser", new String[] {}, groups, new String[] {});
        assertArrayEquals(groups, user.getGroupNames());
    }

        // Test index name with special characters
        builder.setSettingsIndexName("Test-Index_Name.2024");
        assertEquals("test-index_name.2024", builder.settingsIndexName);

        // Test index name with spaces (should be lowercased)
        builder.setSettingsIndexName("Test Index Name");
        assertEquals("test index name", builder.settingsIndexName);
    }

    @Test
    public void testVariousTimeoutFormats() {

            }

            // Check for trailing spaces or periods (Windows doesn't handle well)
            if (component.endsWith(" ") || component.endsWith(".")) {
                throw new SmbException("Path component has trailing space or period: " + component);
            }
        }
    }

    /**
     * Validate host name
     */

        assertTrue(result.startsWith("Allow "));
        // Hexdump.toHexString produces uppercase hex
        assertTrue(result.toLowerCase().contains("0x001200a9"));
        // ACE.toString() outputs "Direct    " with 4 spaces
        assertTrue(result.contains("Direct"));
        assertTrue(result.contains("This folder only"));
    }

    @Test
    @DisplayName("Test toString format for deny ACE")

        return ComponentUtil.getDocumentHelper().encodeSimilarDocHash(input);
    }

    /**
     * Joins array or list elements into a single space-separated string.
     *
     * @param input the input object (String[], List, or String)
     * @return joined string with elements separated by spaces, or empty string if invalid input
     */
    public static String join(final Object input) {
        String[] values = null;

        }

        @ParameterizedTest
        @CsvSource({ "file.txt", "document.doc", "image.png", "folder/subfolder/file.txt", "C:\\Windows\\System32\\config.sys",
                "/usr/local/bin/app", "file with spaces.txt", "''" // empty string
        })
        @DisplayName("Test getFileName with various file names")
        void testGetFileNameWithVariousValues(String fileName) {

        assertTrue(result.contains("pipeName=null"));
    }

    @ParameterizedTest
    @NullAndEmptySource
    @ValueSource(strings = { "\\PIPE\\test", "testpipe", "\\\\server\\pipe\\test", " ", "pipe with spaces" })
    @DisplayName("toString should handle various pipe names")
    void testToStringWithVariousPipeNames(String pipeName) {
        // Arrange

    }

    @ParameterizedTest
    @ValueSource(strings = { "", "a", "test.txt", "very_long_filename_that_exceeds_normal_length_limits_and_tests_buffer_handling.txt",
            "file with spaces.txt", "file*with?wildcards.txt", "../relative/path/file.txt", "C:\\absolute\\path\\file.txt" })
    void testFilenameHandling(String filename) {
        // Test various filename formats

        return fessConfig.isCrawlerDocumentDuplicateTermRemoved();
    }

    /**
     * Gets the array of space character codes from configuration.
     *
     * @return array of character codes to be treated as spaces
     */
    protected int[] getSpaceChars() {
        final FessConfig fessConfig = ComponentUtil.getFessConfig();

            return "https://hooks.slack.com/services/test";
        }

        @Override
        public String getGoogleChatWebhookUrls() {
            return "https://chat.googleapis.com/v1/spaces/test/messages?key=test";
        }
    }

    private static class MockSMailPostingDiscloser implements SMailPostingDiscloser {
        private String subject;
        private String plainText;