### Question:
Tuple implements Serializable { public TupleDesc getTupleDesc() { return tupleDesc; } Tuple(TupleDesc td); TupleDesc getTupleDesc(); RecordId getRecordId(); void setRecordId(RecordId rid); void setField(int i, Field f); Field getField(int i); String toString(); Iterator<Field> fields(); @Override boolean equals(Object o); @Override int hashCode();  }### Answer:
@Test public void getTupleDesc() { TupleDesc td = Utility.getTupleDesc(5); Tuple tup = new Tuple(td); assertEquals(td, tup.getTupleDesc()); }