public void reading_off_same_instance_gives_most_up_to_date_info()
{
var checkSum = new MemoryMappedFileCheckpoint(Filename);
checkSum.Write(0xDEAD);
checkSum.Flush();
var read = checkSum.Read();
checkSum.Close();
Assert.AreEqual(0xDEAD, read);
}
public void the_new_value_is_not_accessible_if_not_flushed_even_with_delay()
{
var checkSum = new MemoryMappedFileCheckpoint(Filename);
var readChecksum = new MemoryMappedFileCheckpoint(Filename);
checkSum.Write(1011);
Thread.Sleep(200);
Assert.AreEqual(0, readChecksum.Read());
checkSum.Close();
readChecksum.Close();
}
public async Task the_new_value_is_accessible_after_flush()
{
var checkSum = new MemoryMappedFileCheckpoint(Filename);
var readChecksum = new MemoryMappedFileCheckpoint(Filename);
checkSum.Write(1011);
checkSum.Flush();
Assert.AreEqual(1011, readChecksum.Read());
checkSum.Close();
readChecksum.Close();
await Task.Delay(100);
}
public void can_read_existing_checksum()
{
var checksum = new MemoryMappedFileCheckpoint(Filename);
checksum.Write(0xDEAD);
checksum.Close();
checksum = new MemoryMappedFileCheckpoint(Filename);
var val = checksum.Read();
checksum.Close();
Assert.AreEqual(0xDEAD, val);
}
public void the_new_value_is_accessible_after_flush()
{
var checkSum = new MemoryMappedFileCheckpoint(Filename);
var readChecksum = new MemoryMappedFileCheckpoint(Filename);
checkSum.Write(1011);
checkSum.Flush();
Assert.AreEqual(1011, readChecksum.Read());
checkSum.Close();
readChecksum.Close();
Thread.Sleep(100);
}
public void mem_mapped_file_checkpoint_can_be_read_as_file_checkpoint()
{
var memoryMapped = new MemoryMappedFileCheckpoint(Filename);
memoryMapped.Write(0xDEAD);
memoryMapped.Flush();
memoryMapped.Dispose();
var fileCheckpoint = new FileCheckpoint(Filename);
var read = fileCheckpoint.Read();
fileCheckpoint.Dispose();
Assert.AreEqual(0xDEAD, read);
}
private static string CreateExistingDatabase(Action <ICheckpoint, TFChunkWriter> runScenario)
{
var databasePath = $"{nameof(StreamRevisionGreaterThanIntMaxValueFixture)}-{Guid.NewGuid():n}";
var bus = new InMemoryBus("bus");
var ioDispatcher = new IODispatcher(bus, new PublishEnvelope(bus));
if (!Directory.Exists(databasePath))
{
Directory.CreateDirectory(databasePath);
}
var writerCheckFilename = Path.Combine(databasePath, Checkpoint.Writer + ".chk");
var chaserCheckFilename = Path.Combine(databasePath, Checkpoint.Chaser + ".chk");
var writerCheckpoint = new MemoryMappedFileCheckpoint(writerCheckFilename, Checkpoint.Writer, cached: true);
var chaserCheckpoint = new MemoryMappedFileCheckpoint(chaserCheckFilename, Checkpoint.Chaser, cached: true);
var db = new TFChunkDb(CreateDbConfig(databasePath, writerCheckpoint, chaserCheckpoint,
TFConsts.ChunkSize));
db.Open();
// create DB
var writer = new TFChunkWriter(db);
writer.Open();
runScenario(writerCheckpoint, writer);
writer.Close();
writerCheckpoint.Flush();
chaserCheckpoint.Write(writerCheckpoint.Read());
chaserCheckpoint.Flush();
db.Close();
return(databasePath);
}