returnedRecord = mapper.selectByPrimaryKey(record.getId1(), record.getId2());
assertNotNull(returnedRecord);
assertTrue(TestUtilities.blobsAreEqual(record.getBlob1(), returnedRecord.getBlob1()));
rows = mapper.deleteByPrimaryKey(record.getId1(), record.getId2());
assertEquals(1, rows);
records = mapper.selectAll();
assertEquals(1, records.size());