final Map<String, Object> metaDataMap = responseData.getMetaDataMap();
        metaDataMap.put("author", "John Doe");
        metaDataMap.put("keywords", new String[] { "java", "search" });

        assertNotNull(responseData.getMetaDataMap());
        assertEquals(2, responseData.getMetaDataMap().size());
        assertEquals("John Doe", responseData.getMetaDataMap().get("author"));
    }

    @Test