public void Lzma_CompressDecompressEndMark()
{
// Start with a MemoryStream created from the sample data, when a stream is
// sent into the encoder an end mark is always written
using (MemoryStream source = new MemoryStream(s_sampledata))
{
using (MemoryStream dest = new MemoryStream())
{
// Compress the data into the destination memory stream instance
LzmaEncoder encoder = new LzmaEncoder();
encoder.WriteEndMark = true;
encoder.Encode(source, dest);
// The compressed data should be smaller than the source data
Assert.IsTrue(dest.Length < source.Length);
source.SetLength(0); // Clear the source stream
dest.Position = 0; // Reset the destination stream
// Decompress the data back into the source memory stream
using (LzmaReader decompressor = new LzmaReader(dest, true)) decompressor.CopyTo(source);
// Ensure that the original data has been restored
Assert.AreEqual(source.Length, s_sampledata.Length);
Assert.IsTrue(s_sampledata.SequenceEqual(source.ToArray()));
}
}
}
public void Lzma_CompressDecompressNoEndMark()
{
using (MemoryStream dest = new MemoryStream())
{
// Compress the data into the destination memory stream instance using
// the raw sample data array and without an end mark. Since the length
// of the input data is known, the encoder will not enforce the end mark
LzmaEncoder encoder = new LzmaEncoder();
encoder.WriteEndMark = false;
encoder.Encode(s_sampledata, dest);
// The compressed data should be smaller than the source data
Assert.IsTrue(dest.Length < s_sampledata.Length);
// Decompress the data back into a new memory stream
using (MemoryStream uncompressed = new MemoryStream())
{
dest.Position = 0;
using (LzmaReader decompressor = new LzmaReader(dest, true)) decompressor.CopyTo(uncompressed);
// Ensure that the original data has been restored
Assert.AreEqual(uncompressed.Length, s_sampledata.Length);
Assert.IsTrue(s_sampledata.SequenceEqual(uncompressed.ToArray()));
}
}
}
public void Lzma_DecompressExternal()
{
// Decompress a stream created externally to this library
using (LzmaReader reader = new LzmaReader(Assembly.GetExecutingAssembly().GetManifestResourceStream("zuki.io.compression.test.thethreemusketeers.lzma")))
{
using (MemoryStream dest = new MemoryStream())
{
reader.CopyTo(dest);
dest.Flush();
// Verify that the output matches the sample data byte-for-byte
Assert.IsTrue(Enumerable.SequenceEqual(s_sampledata, dest.ToArray()));
}
}
}