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;

    }

    /**
     * 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;
        if (input instanceof String[]) {
            values = (String[]) input;

import org.codelibs.fess.util.QueryResponseList;
import org.dbflute.optional.OptionalThing;
import org.junit.jupiter.api.Test;

/**
 * Edge case tests for RankFusionProcessor.
 * Tests boundary conditions, empty states, and error scenarios.
 */
public class RankFusionProcessorEdgeCaseTest extends UnitFessTestCase {

    private static final String ID_FIELD = "_id";

    /**

    }

    /**
     * Escapes special characters in a value string for safe logging.
     *
     * @param action the string value to escape
     * @return the escaped string with tabs replaced by spaces
     */
    protected String escapeValue(final String action) {
        return action.replace('\t', ' ');
    }

    /**
     * Outputs a log message using the statistics logger.
     *

        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 fessConfig.getCrawlerDocumentSpaceCharsAsArray();
    }

    /**

labels.profile.placeholder_confirm_new_password= Nieuw wachtwoord bevestigen
labels.top.search=Zoeken
labels.index_title=Fess
labels.index_form_search_btn=Zoeken
labels.index_osdd_title=Zoeken
labels.index_form_option_btn=Opties
labels.index_help=Help
labels.search_options=Zoekopties
labels.search_options_close=Sluiten
labels.search_options_clear=Wissen

        final URL value = transformer.getURL("http://example.com/", "page with spaces");
        // java.net.URL accepts spaces in path (unlike URI)
        assertNotNull(value);
        assertTrue(value.toExternalForm().contains("page with spaces"));
    }

    @Test
    public void test_normalizeCanonicalUrl_withCustomSchemeRelative() throws Exception {

labels.page_not_found_title=Seite nicht gefunden.
labels.check_url=Bitte überprüfen Sie die URL.
labels.busy_title=Dienst vorübergehend nicht verfügbar
labels.busy_message=Der Server ist derzeit stark ausgelastet. Bitte versuchen Sie es später erneut.
labels.user_name=Benutzername
labels.login=Anmelden
labels.login.placeholder_username=Benutzername
labels.login.placeholder_password=Passwort
labels.login.title=Anmelden
labels.index_label=Label

        String result1 = crawlingInfoHelper.generateId(input1);
        assertNotNull(result1);
        assertEquals(128, result1.length());

        String input2 = "http://example.com/path with spaces";
        String result2 = crawlingInfoHelper.generateId(input2);
        assertNotNull(result2);
        assertEquals(128, result2.length());

        String input3 = "http://example.com/path<with>special|chars";

        final Path result = indexExportJob.buildFilePath("/export", "https://example.com/path%20with%20spaces/file.html",
                new HtmlIndexExportFormatter());
        assertEquals(Path.of("/export/example.com/path with spaces/file.html"), result);
    }

    // --- buildHtml() tests ---

    @Test
    public void test_buildHtml_basicDocument() {
        final Map<String, Object> source = new LinkedHashMap<>();