host1.setDuplicateHostName("example.com");
        helper.duplicateHostList.add(host1);

        DuplicateHost host2 = new DuplicateHost();
        host2.setRegularName("secure.example.com");
        host2.setDuplicateHostName("www.example.com");
        helper.duplicateHostList.add(host2);

        String url = "http://example.com/test";
        String result = helper.convert(url);

        helper.publishEvent("config_updated", "node2@host2", "web_config");

        assertNotNull(capturedBody.get());
        final Map<String, Object> body = coordinatorHelper.parseJson(capturedBody.get());
        assertEquals("event", body.get("type"));
        assertEquals("config_updated", body.get("name"));
        assertEquals("node1@host1", body.get("instanceId"));
        assertEquals("node2@host2", body.get("targetInstanceId"));

        testData.add(createRelatedQuery("term1", new String[] { "query2" }, "host2"));
        testData.add(createRelatedQuery("term2", new String[] { "query3" }, ""));
        mockBhv.setTestData(testData);

        int count = relatedQueryHelper.load();
        assertEquals(3, count); // Three virtual host keys: "host1", "host2", ""
    }

    @Test
    public void test_load_sameTermDifferentHosts() {

        testData.add(createRelatedContent("term1", "Content for host2", "host2"));
        testData.add(createRelatedContent("term2", "Content for default", ""));
        mockBhv.setTestData(testData);

        int count = relatedContentHelper.load();
        assertEquals(3, count); // Three virtual host keys: "host1", "host2", ""
    }

    @Test
    public void test_getHostKey_emptyVirtualHost() {

        assertFalse(messages1.isEmpty());

        final FessMessages messages2 = new FessMessages();
        messages2.addErrorsOperationAlreadyRunning("prop", "node1@host2");
        assertFalse(messages2.isEmpty());
    }

    // ===================================================================================