public void CompressionImprovesWithDictionary()
{
var trainingData = new byte[100][];
for (int i = 0; i < trainingData.Length; i++)
{
trainingData[i] = DataGenerator.GetSmallBuffer(DataFill.Random);
}
var dict = DictBuilder.TrainFromBuffer(trainingData);
var compressionOptions = new CompressionOptions(dict);
var testStream = DataGenerator.GetSmallStream(DataFill.Random);
var normalResultStream = new MemoryStream();
using (var compressionStream = new CompressorStream(normalResultStream))
testStream.CopyTo(compressionStream);
var dictResultStream = new MemoryStream();
using (var compressionStream = new CompressorStream(dictResultStream, compressionOptions))
testStream.CopyTo(compressionStream);
Assert.Greater(normalResultStream.Length, dictResultStream.Length);
}
public void CompressionShrinksData()
{
var inStream = DataGenerator.GetLargeStream(DataFill.Sequential);
var outStream = new MemoryStream();
using (var compressionStream = new CompressorStream(outStream))
inStream.CopyTo(compressionStream);
Assert.Greater(inStream.Length, outStream.Length);
}
public void RoundTrip_StreamingStreaming()
{
var testStream = DataGenerator.GetLargeStream(DataFill.Sequential);
var tempStream = new MemoryStream();
using (var compressionStream = new CompressorStream(tempStream))
testStream.CopyTo(compressionStream);
var resultStream = new MemoryStream();
tempStream.Position = 0;
using (var decompressionsStream = new DecompressorStream(tempStream))
decompressionsStream.CopyTo(resultStream);
Validate(testStream.ToArray(), resultStream.ToArray());
}
public void RoundTrip_StreamingToBatch()
{
var testStream = DataGenerator.GetLargeStream(DataFill.Sequential);
var tempStream = new MemoryStream();
using (var compressorStream = new CompressorStream(testStream))
tempStream.CopyTo(compressorStream);
byte[] resultBuffer;
using (var decompressor = new Decompressor())
resultBuffer = decompressor.Unwrap(tempStream.ToArray());
Validate(tempStream.ToArray(), resultBuffer);
}