public void records_can_be_read_backward_starting_from_any_position()
{
for (int i = 0; i < RecordsCount; ++i)
{
var seqReader = new TFChunkReader(_db, _db.Config.WriterCheckpoint, _records[i].LogPosition);
SeqReadResult res;
int count = 0;
while ((res = seqReader.TryReadPrev()).Success)
{
var rec = _records[i - count - 1];
Assert.AreEqual(rec, res.LogRecord);
Assert.AreEqual(rec.LogPosition, res.RecordPrePosition);
Assert.AreEqual(rec.LogPosition + rec.GetSizeWithLengthPrefixAndSuffix(), res.RecordPostPosition);
++count;
}
Assert.AreEqual(i, count);
}
}
public void all_records_could_be_read_doing_forward_backward_pass()
{
var seqReader = new TFChunkReader(_db, _db.Config.WriterCheckpoint, 0);
SeqReadResult res;
int count1 = 0;
while ((res = seqReader.TryReadNext()).Success)
{
var rec = _records[count1];
Assert.AreEqual(rec, res.LogRecord);
Assert.AreEqual(rec.LogPosition, res.RecordPrePosition);
Assert.AreEqual(rec.LogPosition + rec.GetSizeWithLengthPrefixAndSuffix(), res.RecordPostPosition);
++count1;
}
Assert.AreEqual(RecordsCount, count1);
int count2 = 0;
while ((res = seqReader.TryReadPrev()).Success)
{
var rec = _records[RecordsCount - count2 - 1];
Assert.AreEqual(rec, res.LogRecord);
Assert.AreEqual(rec.LogPosition, res.RecordPrePosition);
Assert.AreEqual(rec.LogPosition + rec.GetSizeWithLengthPrefixAndSuffix(), res.RecordPostPosition);
++count2;
}
Assert.AreEqual(RecordsCount, count2);
}