String key = relatedContentHelper.getHostKey(entity);
        assertEquals("", key);
    }

    @Test
    public void test_getHostKey_withVirtualHost() {
        RelatedContent entity = createRelatedContent("term", "content", "example.com");
        String key = relatedContentHelper.getHostKey(entity);
        assertEquals("example.com", key);
    }

        String key = relatedQueryHelper.getHostKey(entity);
        assertEquals("", key);
    }

    @Test
    public void test_getHostKey_withVirtualHost() {
        RelatedQuery entity = createRelatedQuery("term", new String[] { "query" }, "example.com");
        String key = relatedQueryHelper.getHostKey(entity);
        assertEquals("example.com", key);
    }