Tuple t3 = Util.createTuple(new String[]{"g", "h", "i"});
Tuple t4 = Util.createTuple(new String[]{"j", "k", "l"});
DataBag b = Util.createBag(new Tuple[]{t1, t2, t3, t4});
expected = new Long(4);
t.set(0, b);
size = new BagSize();
msg = "[Testing BagSize on input type: Bag]";
assertTrue(msg, expected.equals(size.exec(t)));
// Tuple size