public void ByteSizedFile()
{
var compressor = new Compressor();
var ms1 = new MemoryStream();
int compressedLength = compressor.Compress(new MemoryStream(new byte[] { 1 }), ms1);
Assert.That(compressedLength, Is.EqualTo(3));
Assert.That(ms1.ToArray(), Is.EqualTo(new byte[] { 1, 0, 1 }));
var ms2 = new MemoryStream();
compressedLength = compressor.Compress(new MemoryStream(new byte[] { 1, 2, 3, 4, }), ms2);
Assert.That(compressedLength, Is.EqualTo(6));
Assert.That(ms2.ToArray(), Is.EqualTo(new byte[] { 4, 12, 1, 2, 3, 4 }));
}
public void CompressibleFile2()
{
var compressor = new Compressor();
var ms = new MemoryStream();
var data = File.ReadAllBytes(GetTestFile(@"ptt5"));
int compressedLength = compressor.Compress(new MemoryStream(data), ms);
var actual = GetOutputFile("ptt5.bin");
File.WriteAllBytes(actual, ms.ToArray());
FileAssert.AreEqual(GetExpectedFile("ptt5.comp"), actual);
}
public void CompressibleFile()
{
var compressor = new Compressor();
var ms = new MemoryStream();
var data = File.ReadAllBytes(GetTestFile(@"alice29.txt"));
int compressedLength = compressor.Compress(new MemoryStream(data), ms);
Assert.That(data.Length, Is.EqualTo(152089));
Assert.That(compressedLength, Is.EqualTo(90965));
var actual = GetOutputFile("alice29.bin");
File.WriteAllBytes(actual, ms.ToArray());
FileAssert.AreEqual(GetExpectedFile("alice29.txt.comp"), actual);
}
public void CompressText()
{
var compressor = new Compressor();
var ms = new MemoryStream();
var data = System.Text.Encoding.ASCII.GetBytes("Wikipedia is a free, web-based, collaborative, multilingual encyclopedia project.");
int compressedLength = compressor.Compress(new MemoryStream(data), ms);
Assert.That(data.Length, Is.EqualTo(81));
Assert.That(compressedLength, Is.EqualTo(84));
var compressed = ms.ToArray();
Assert.That(compressed[0], Is.EqualTo(0x51));
Assert.That(compressed[1], Is.EqualTo(0xF0));
Assert.That(compressed[2], Is.EqualTo(0x50));
Console.WriteLine(Convert.ToBase64String(compressed));
Assert.That(Convert.ToBase64String(compressed), Is.EqualTo("UfBQV2lraXBlZGlhIGlzIGEgZnJlZSwgd2ViLWJhc2VkLCBjb2xsYWJvcmF0aXZlLCBtdWx0aWxpbmd1YWwgZW5jeWNsb3BlZGlhIHByb2plY3Qu"));
}
public void Test(string filename)
{
var inputFile = GetTestFile(@filename);
var compressedStream = new MemoryStream();
using (var fs = File.OpenRead(inputFile))
{
var compressor = new Compressor();
compressor.Compress(fs, compressedStream);
}
compressedStream.Seek(0, SeekOrigin.Begin);
var outputFile = GetOutputFile(filename);
using (var fs = File.Create(outputFile))
{
Decompressor.Decompress(compressedStream, fs);
}
FileAssert.AreEqual(inputFile, outputFile);
}
private int CompressData(byte[] data, string filename)
{
var actual = GetOutputFile(filename);
using ( var fs = File.Create(actual) )
{
var compressor = new Compressor();
return compressor.Compress(new MemoryStream(data), fs);
}
}
public void ZeroSizedFile()
{
var ms = new MemoryStream();
var compressor = new Compressor();
int compressedLength = compressor.Compress(Stream.Null, ms);
Assert.That(compressedLength, Is.EqualTo(1));
Assert.That(ms.ToArray(), Is.EqualTo(new byte[] { 0 }));
}