attributeSources.add(this.sourceTwo);
attributeSources.add(this.collidesWithOne);
MergingPersonAttributeDaoImpl impl = new MergingPersonAttributeDaoImpl();
impl.setPersonAttributeDaos(attributeSources);
impl.setMerger(new NoncollidingAttributeAdder());
Map queryMap = new HashMap();
queryMap.put(queryAttr, "awp9");
Map result = impl.getUserAttributes(queryMap);