public void Can_Read_Bytes_From_File()
{
//1)read bytes from file into GLOBAL string in the form of zeros and ones
//2)loop over this string(IEnumerable<char>) and when finding prefix code
//delete it from GLOBAL and append symbol(which has that prefix code) to DECODED_TEXT string
//3)write DECODED_TEXT into file with name <previous_Name>_decoded.txt
string input = "01110100011001010111001101110100";
string pathForFile = PathTestDir + "geig_encoded";
int numBytes = (int)Math.Ceiling(input.Length / 8m);
var bytesAsStrings =
Enumerable.Range(0, numBytes)
.Select(i => input.Substring(8 * i, Math.Min(8, input.Length - 8 * i)));
byte[] bytes = bytesAsStrings.Select(s => Convert.ToByte(s, 2)).ToArray();
using (FileStream fs = File.OpenWrite(pathForFile))
{
fs.Write(bytes);
fs.Close();
}
using (FileStream fs = File.OpenRead(pathForFile))
{
BinaryReader br = new BinaryReader(fs);
byte[] outBytes = br.ReadBytes(numBytes);
string bRepresent = "";
foreach (var b in outBytes)
{
bRepresent += HuffmanWrapper <char> .GetByteString(b);
}
Assert.AreEqual(input, bRepresent);
}
}
public void HuffmanCompressDecompressTest()
{
var hufWrapper = new HuffmanWrapper <char>();
hufWrapper.Huffman(Source);
Dictionary <char, List <int> > huffmanDictionary =
hufWrapper.Encode();
foreach (char c in huffmanDictionary.Keys)
{
Console.Write("{0}: ", c);
foreach (int bit in huffmanDictionary[c])
{
Console.Write("{0}", bit);
}
Console.WriteLine();
}
// write in file encoded text
BytesCount = hufWrapper.WriteEncodedToFile(PathDir + "WarAndPeace1_encoded",
hufWrapper.GetEncodedText(Source, huffmanDictionary));
//Decompress
string binaryString = hufWrapper.ReadBytesFromFile(PathDir + "WarAndPeace1_encoded", BytesCount);
List <char> decodedList = hufWrapper.Decode(binaryString);
hufWrapper.WriteDecodedToFile(decodedList, PathDir + "WarAndPeace1_decoded.txt");
}