public void all_records_could_be_read_doing_forward_backward_pass()
{
var seqReader = new TFChunkSequentialReader(_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.Position, res.RecordPrePosition);
Assert.AreEqual(rec.Position + 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.Position, res.RecordPrePosition);
Assert.AreEqual(rec.Position + rec.GetSizeWithLengthPrefixAndSuffix(), res.RecordPostPosition);
++count2;
}
Assert.AreEqual(RecordsCount, count2);
}
public void try_read_does_not_cache_anything_and_returns_record_once_it_is_written_later()
{
var writerchk = new InMemoryCheckpoint(0);
var db = new TFChunkDb(new TFChunkDbConfig(PathName,
new VersionedPatternFileNamingStrategy(PathName, "chunk-"),
10000,
0,
writerchk,
new InMemoryCheckpoint()));
db.OpenVerifyAndClean();
var writer = new TFChunkWriter(db);
writer.Open();
var reader = new TFChunkSequentialReader(db, writerchk, 0);
LogRecord record;
Assert.IsFalse(reader.TryReadNext(out record));
var rec = LogRecord.SingleWrite(0, Guid.NewGuid(), Guid.NewGuid(), "ES", -1, "ET", new byte[] { 7 }, null);
long tmp;
Assert.IsTrue(writer.Write(rec, out tmp));
writer.Flush();
writer.Close();
Assert.IsTrue(reader.TryReadNext(out record));
Assert.AreEqual(rec, record);
reader.Close();
db.Close();
}
public void all_records_could_be_read_with_forward_pass()
{
var seqReader = new TFChunkSequentialReader(_db, _db.Config.WriterCheckpoint, 0);
SeqReadResult res;
int count = 0;
while ((res = seqReader.TryReadNext()).Success)
{
var rec = _keptRecords[count];
Assert.AreEqual(rec, res.LogRecord);
++count;
}
Assert.AreEqual(_keptRecords.Length, count);
}
public void all_records_could_be_read_with_backward_pass()
{
var seqReader = new TFChunkSequentialReader(_db, _db.Config.WriterCheckpoint, _db.Config.WriterCheckpoint.Read());
SeqReadResult res;
int count = 0;
while ((res = seqReader.TryReadPrev()).Success)
{
var rec = _keptRecords[_keptRecords.Length - count - 1];
Assert.AreEqual(rec, res.LogRecord);
Assert.AreEqual(rec.Position, res.RecordPrePosition);
Assert.AreEqual(rec.Position + rec.GetSizeWithLengthPrefixAndSuffix(), res.RecordPostPosition);
++count;
}
Assert.AreEqual(_keptRecords.Length, count);
}
public void records_can_be_read_forward_starting_from_any_position()
{
for (int i = 0; i < RecordsCount; ++i)
{
var seqReader = new TFChunkSequentialReader(_db, _db.Config.WriterCheckpoint, _records[i].Position);
SeqReadResult res;
int count = 0;
while ((res = seqReader.TryReadNext()).Success)
{
var rec = _keptRecords[(i + 1) / 2 + count];
Assert.AreEqual(rec, res.LogRecord);
//Assert.AreEqual(rec.Position + rec.GetSizeWithLengthPrefixAndSuffix(), seqReader.Position);
++count;
}
Assert.AreEqual(_keptRecords.Length - (i + 1) / 2, count);
}
}
public void try_read_returns_false_when_writer_checksum_is_zero()
{
var writerchk = new InMemoryCheckpoint(0);
var db = new TFChunkDb(new TFChunkDbConfig(PathName,
new VersionedPatternFileNamingStrategy(PathName, "chunk-"),
10000,
0,
writerchk,
new InMemoryCheckpoint()));
db.OpenVerifyAndClean();
var reader = new TFChunkSequentialReader(db, writerchk, 0);
LogRecord record;
Assert.IsFalse(reader.TryReadNext(out record));
db.Close();
}
public void records_can_be_read_backward_starting_from_any_position()
{
for (int i = 0; i < RecordsCount; ++i)
{
var seqReader = new TFChunkSequentialReader(_db, _db.Config.WriterCheckpoint, _records[i].Position);
SeqReadResult res;
int count = 0;
while ((res = seqReader.TryReadPrev()).Success)
{
var rec = _records[i - count - 1];
Assert.AreEqual(rec, res.LogRecord);
Assert.AreEqual(rec.Position, res.RecordPrePosition);
Assert.AreEqual(rec.Position + rec.GetSizeWithLengthPrefixAndSuffix(), res.RecordPostPosition);
++count;
}
Assert.AreEqual(i, count);
}
}