### Question:
Insert extends Operator { public TupleDesc getTupleDesc() { return returnDesc; } Insert(TransactionId t,DbIterator child, int tableid); TupleDesc getTupleDesc(); void open(); void close(); void rewind(); @Override DbIterator[] getChildren(); @Override void setChildren(DbIterator[] children);  }### Answer:
@Test public void getTupleDesc() throws Exception { Insert op = new Insert(tid,scan1, empty.getId()); TupleDesc expected = Utility.getTupleDesc(1); TupleDesc actual = op.getTupleDesc(); assertEquals(expected, actual); }