+ "{\"_source\":{\"type\":\"heartbeat\",\"instanceId\":\"node2@host2\",\"hostname\":\"host2\",\"name\":\"node2\",\"createdTime\":2000}}"
                + "]}}";
        final CoordinatorHelper helper = createCapturingHelper("node1@host1", null, null, createMockResponse(200, searchResponse));

        assertNotNull(result);
        assertFalse(result.isEmpty());
        assertTrue(result.hasMessageOf("testProperty"));
    }

    @Test
    public void test_addErrorsOperationAlreadyRunning_withDifferentHosts() {
        final FessMessages messages1 = new FessMessages();
        messages1.addErrorsOperationAlreadyRunning("prop", "host1");
        assertFalse(messages1.isEmpty());

labels.max_access_count=Max Access Count
labels.number_of_thread=Number of Threads
labels.interval_time=Interval
labels.millisec=msec
labels.permissions=Permissions
labels.virtual_hosts=Virtual Hosts
labels.virtual_host=Virtual Host
labels.label_type=Label
labels.file_crawling_button_create=Create
labels.file_crawling_button_create_job=Create New Job
labels.web_crawling_configuration=Web Crawling

labels.webauth_configuration=Uwierzytelnianie web
labels.webauth_list_hostname=Nazwa hosta
labels.webauth_list_web_crawling_config=Nazwa konfiguracji
labels.webauth_any=Dowolny
labels.webauth_create_web_config=Utwórz nową konfigurację web
labels.webauth_title_details=Uwierzytelnianie web
labels.webauth_hostname=Nazwa hosta
labels.webauth_port=Port
labels.webauth_realm=Obszar
labels.webauth_scheme=Schemat

        return buf.toString().trim();
    }

    /**
     * Replaces duplicate hosts in the URL using the duplicate host helper.
     *
     * @param url the URL to process
     * @return the URL with duplicate hosts replaced
     */
    protected String replaceDuplicateHost(final String url) {
        try {
            // remove duplicate host

labels.max_access_count=Número máximo de acessos
labels.number_of_thread=Número de threads
labels.interval_time=Intervalo
labels.millisec=milissegundos
labels.permissions=Permissões
labels.virtual_hosts=Hosts virtuais
labels.virtual_host=Host virtual
labels.label_type=Rótulo
labels.file_crawling_button_create=Criar
labels.file_crawling_button_create_job=Criar novo trabalho
labels.web_crawling_configuration=Rastreamento da Web

                return new Tuple3[] { new Tuple3<>("Host", "example.com", "site1"), new Tuple3<>("X-Forwarded-Host", "test.com", "site2") };
            }
        });

        MockletHttpServletRequest request = getMockRequest();

        // No matching host header
        String key = virtualHostHelper.getVirtualHostKey();
        assertEquals("", key);

        // Matching host header
        request.addHeader("Host", "example.com");

        final String result = indexExportJob.query(QueryBuilders.termQuery("host", "example.com")).execute();

        assertEquals("Exported 0 documents.", result);
    }

    // --- Edge cases ---

    @Test
    public void test_buildFilePath_emptyString() {
        // Empty string is a valid relative URI with null host and empty path

labels.max_access_count=Max Access Count
labels.number_of_thread=Number of Threads
labels.interval_time=Interval
labels.millisec=msec
labels.permissions=Permissions
labels.virtual_hosts=Virtual Hosts
labels.virtual_host=Virtual Host
labels.label_type=Label
labels.file_crawling_button_create=Create
labels.file_crawling_button_create_job=Create New Job
labels.web_crawling_configuration=Web Crawling

labels.number_of_thread=Aantal threads
labels.interval_time=Interval
labels.millisec=milliseconden
labels.permissions=Machtigingen
labels.virtual_hosts=Virtuele hosts
labels.virtual_host=Virtuele host
labels.label_type=Label
labels.file_crawling_button_create=Maken
labels.file_crawling_button_create_job=Nieuwe taak maken
labels.web_crawling_configuration=Webcrawlen