m.put("1", "hadoop");
m.put("source", "apache");
Tuple input = TupleFactory.getInstance().newTuple(m);
VALUESET valueSet = new VALUESET();
DataBag result = valueSet.exec(input);
//Value set should only contain 2 elements
assertEquals(result.size(), 2);
Iterator<Tuple> i = result.iterator();
List resultList = new ArrayList<String>();