private static FileHeader GetHeader(BlockStream blockStream, out DemoCustomHeader customHeader)
{
var headerType = FileHeader.GetHeader(0, GenomeAssembly.Unknown, new DemoCustomHeader(new BlockStream.BlockPosition()));
var header = (FileHeader)blockStream.ReadHeader(headerType);
customHeader = header.Custom as DemoCustomHeader;
return(header);
}
public void ReadAndWrite()
{
string expectedString = GetRandomString(Block.Size + 10000);
var customHeader = new DemoCustomHeader(new BlockStream.BlockPosition());
var header = new FileHeader(CacheConstants.Identifier, CacheConstants.SchemaVersion,
CacheConstants.DataVersion, TranscriptDataSource.Ensembl, NumTicks, ExpectedGenomeAssembly, customHeader);
using (var ms = new MemoryStream())
{
WriteBlockStream(Qlz, header, customHeader, ms, expectedString);
ms.Seek(0, SeekOrigin.Begin);
ReadFromBlockStream(Qlz, ms, expectedString);
}
}
private static void WriteBlockStream(ICompressionAlgorithm compressionAlgorithm, IFileHeader header,
DemoCustomHeader customHeader, MemoryStream ms, string s)
{
using (var blockStream = new BlockStream(compressionAlgorithm, ms, CompressionMode.Compress, true))
using (var writer = new ExtendedBinaryWriter(blockStream))
{
CheckReadException(blockStream);
blockStream.WriteHeader(header);
var bp = new BlockStream.BlockPosition();
// detect that we have written a block
blockStream.GetBlockPosition(bp);
int beforeBlockId = bp.Id;
writer.WriteOptAscii(s);
blockStream.GetBlockPosition(bp);
int afterBlockId = bp.Id;
Assert.NotEqual(beforeBlockId, afterBlockId);
// here we write a test string that won't invoke a new block
blockStream.GetBlockPosition(customHeader.DemoPosition);
beforeBlockId = customHeader.DemoPosition.Id;
writer.WriteOptAscii(SmallString);
blockStream.GetBlockPosition(bp);
afterBlockId = customHeader.DemoPosition.Id;
Assert.Equal(beforeBlockId, afterBlockId);
Assert.Equal(customHeader.DemoPosition.FileOffset, blockStream.Position);
blockStream.Flush();
// this will be flushed during dispose
writer.WriteOptAscii(FinalString);
}
}
