public void EndOfFile()
{
using (var ms = new MemoryStream())
{
var writeBuffer = BlockStreamTests.GetRandomBytes(100);
var readBuffer = new byte[60];
using (var bgzipStream = new BlockGZipStream(ms, CompressionMode.Compress, true))
{
bgzipStream.Write(writeBuffer, 0, writeBuffer.Length);
}
ms.Position = 0;
using (var bgzipStream = new BlockGZipStream(ms, CompressionMode.Decompress))
{
int numBytesRead = bgzipStream.Read(readBuffer, 0, 0);
Assert.Equal(0, numBytesRead);
numBytesRead = bgzipStream.Read(readBuffer, 0, readBuffer.Length);
Assert.Equal(readBuffer.Length, numBytesRead);
numBytesRead = bgzipStream.Read(readBuffer, 0, readBuffer.Length);
Assert.Equal(writeBuffer.Length - readBuffer.Length, numBytesRead);
numBytesRead = bgzipStream.Read(readBuffer, 0, readBuffer.Length);
Assert.Equal(0, numBytesRead);
}
}
}
public void UncompressedBlockTruncation()
{
const int bufferSize = 10000;
var buffer = BlockStreamTests.GetRandomBytes(bufferSize);
int copyLength;
var ms = GetBlockStream(Qlz, buffer, bufferSize, out copyLength);
ms.Seek(0, SeekOrigin.Begin);
var readBlock = new Block(Qlz);
using (var truncatedMs = new MemoryStream())
{
truncatedMs.Write(ms.ToArray(), 0, (int)ms.Length - 100);
truncatedMs.Seek(0, SeekOrigin.Begin);
// ReSharper disable once AccessToDisposedClosure
Assert.Throws <IOException>(delegate { readBlock.Read(truncatedMs); });
}
}
public void ReadBlockCorrupted()
{
using (var ms = new MemoryStream())
using (var truncatedMs = new MemoryStream())
using (var corruptMs = new MemoryStream())
{
using (var bgzipStream = new BlockGZipStream(ms, CompressionMode.Compress, true))
using (var writer = new StreamWriter(bgzipStream, Encoding.ASCII, 4096))
{
writer.WriteLine("The quick brown fox jumped over the lazy dog.");
}
var compressedData = ms.ToArray();
truncatedMs.Write(compressedData, 0, compressedData.Length - 10);
truncatedMs.Position = 0;
corruptMs.Write(compressedData, 0, BlockGZipStream.BlockGZipFormatCommon.BlockHeaderLength);
var randomBytes = BlockStreamTests.GetRandomBytes(500);
corruptMs.Write(randomBytes, 0, randomBytes.Length);
corruptMs.Position = 0;
var readBuffer = new byte[60];
Assert.Throws <CompressionException>(delegate
{
using (var bgzipStream = new BlockGZipStream(truncatedMs, CompressionMode.Decompress))
{
bgzipStream.Read(readBuffer, 0, readBuffer.Length);
}
});
Assert.Throws <CompressionException>(delegate
{
using (var bgzipStream = new BlockGZipStream(corruptMs, CompressionMode.Decompress))
{
bgzipStream.Read(readBuffer, 0, readBuffer.Length);
}
});
}
}
/// <summary>
/// constructor
/// </summary>
public CompressionAlgorithmTests()
{
_originalBytes = BlockStreamTests.GetRandomBytes(NumOriginalBytes);
}
public CompressionAlgorithmTests()
{
_originalBytes = BlockStreamTests.GetRandomBytes(NumOriginalBytes);
_dictBuffer = LoadZstandardDictionary();
}