public void a_record_can_be_written()
{
var filename = Path.Combine(PathName, "prefix.tf0");
File.WriteAllBytes(filename, new byte[10000]);
_checkpoint = new InMemoryCheckpoint(137);
var tf = new MultifileTransactionFileWriter(new TransactionFileDatabaseConfig(PathName, "prefix.tf", 10000, _checkpoint, new List<ICheckpoint>()));
tf.Open();
var record = new PrepareLogRecord(logPosition: 0,
correlationId: _correlationId,
eventId: _eventId,
expectedVersion: 1234,
transactionPosition: 0,
transactionOffset: 0,
eventStreamId: "WorldEnding",
timeStamp: new DateTime(2012, 12, 21),
flags: PrepareFlags.None,
eventType: "type",
data: new byte[] { 1, 2, 3, 4, 5 },
metadata: new byte[] {7, 17});
long tmp;
tf.Write(record, out tmp);
tf.Flush();
tf.Close();
Assert.AreEqual(record.GetSizeWithLengthPrefixAndSuffix() + 137, _checkpoint.Read()); //137 is fluff assigned to beginning of checkpoint
//TODO actually read the event
using (var filestream = File.Open(filename, FileMode.Open, FileAccess.Read))
{
filestream.Seek(137 + sizeof(int), SeekOrigin.Begin);
var reader = new BinaryReader(filestream);
var read = LogRecord.ReadFrom(reader);
Assert.AreEqual(record, read);
}
}
public void try_read_does_not_cache_anything_and_returns_record_once_it_is_written_later()
{
var writerchk = new InMemoryCheckpoint(0);
var config = new TransactionFileDatabaseConfig(PathName, "prefix.tf", 10000, writerchk, new ICheckpoint[0]);
// create db
var writer = new MultifileTransactionFileWriter(config);
writer.Open();
var reader = new MultifileTransactionFileChaser(config);
reader.Open();
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();
}
