Method rewind

test/simpledb/JoinTest.java:77–91

Unit test for Join.rewind()

()

   * Unit test for Join.rewind()
   */
  @Test public void rewind() throws Exception {
    JoinPredicate pred = new JoinPredicate(0, Predicate.Op.EQUALS, 0);
    Join op = new Join(pred, scan1, scan2);
    op.open();
    while (op.hasNext()) {
      assertNotNull(op.next());
    }
    assertTrue(TestUtil.checkExhausted(op));
    op.rewind();

    eqJoin.open();
    Tuple expected = eqJoin.next();
    Tuple actual = op.next();
    assertTrue(TestUtil.compareTuples(expected, actual));
  }

  /**
   * Unit test for Join.getNext() using a > predicate