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

    public void test_getHostKey_nullVirtualHost() {
        RelatedContent entity = createRelatedContent("term", "content", null);
        String key = relatedContentHelper.getHostKey(entity);
        assertEquals("", key);
    }

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

    public void test_getHostKey_nullVirtualHost() {
        RelatedQuery entity = createRelatedQuery("term", new String[] { "query" }, null);
        String key = relatedQueryHelper.getHostKey(entity);
        assertEquals("", key);
    }