### Question:
Response extends WadlElement { @Override public String toString() { final StringBuilder sb = new StringBuilder(); sb.append("{"); sb.append("statusCodes").append(" : ").append(statusCodes); sb.append(", "); sb.append("params").append(" : ").append(params); sb.append(", "); sb.append("representations").append(" : ").append(representations); sb.append(", "); sb.append("doc").append(" : ").append(getDocumentation()); sb.append("}"); return sb.toString(); } Response(final List<String> statusCodes, final List<Documentation> doc, final List<Param> params,
            final List<Representation> representations); List<String> getStatusCodes(); List<Param> getParams(); List<Representation> getRepresentations(); @Override String toString();  }### Answer:
@Test public void testToString() { assertTrue(!"".equals(response.toString())); }