public void CngImageReader_ReadByte_Modifies_Stream_Data_Test(byte data)
{
// Arrange
var testStream = new MemoryStream(data);
var cngReader = new CngImageReader(testStream);
// Act
var result = (byte)cngReader.Read();
// Assert
Assert.NotEqual(data, result);
}
public void CngImageReader_ReadBytes_Returns_Number_Bytes_Requested_If_Stream_Contains_Length_Test(byte[] data)
{
// Arrange
var testStream = new MemoryStream(data);
var cngReader = new CngImageReader(testStream);
var requstedByteSize = 6;
// Act
var result = cngReader.ReadBytes(requstedByteSize);
// Assert
Assert.Equal(requstedByteSize, result.Length);
}
public void CngImageReader_ReadByte_Modifies_Stream_With_Xor_Test()
{
// Arrange
byte data = 1;
var byteData = new byte[] { data };
var testStream = new MemoryStream(byteData);
var cngReader = new CngImageReader(testStream);
// Act
var result = cngReader.Read();
// Assert
Assert.Equal(data ^ CngImageReader.XorValue, result);
}
public void CngImageReader_ReadBytes_Returns_Specified_Byte_Length_Data_Test(byte[] data)
{
// Arrange
var testStream = new MemoryStream(data);
var cngReader = new CngImageReader(testStream);
// Act
var result = cngReader.ReadBytes(8);
// Assert
for (var i = 0; i < data.Length; i++)
{
Assert.NotEqual(data[i], result[i]);
}
}
public void CngImageReader_ReadBytes_Modifies_Stream_With_Xor_Test()
{
// Arrange
var byteData = new byte[] { 1, 2, 3, 4, 5, 6, 7, 8 };
var testStream = new MemoryStream(byteData);
var cngReader = new CngImageReader(testStream);
// Act
var result = cngReader.ReadBytes(8);
// Assert
for (var i = 0; i < 8; i++)
{
Assert.Equal(byteData[i] ^ CngImageReader.XorValue, result[i]);
}
}
static void Main(string[] args)
{
const string inputFile = @"/media/aaron/CNG_DISC1/disc1/images/199x/19960501/NGM_1996_05_040_4.cng"; //@"E:\NGM_1996_05_001_4.cng";
const string outputFile = @"outputfile.jpg";
var fileInfo = new FileInfo(inputFile);
var fileLength = fileInfo.Length;
using (var fs = fileInfo.OpenRead())
{
using (var os = new FileStream(outputFile, FileMode.Create, FileAccess.Write))
{
var br = new CngImageReader(fs);
var buffer = br.ReadBytes((int)fileLength);
var bw = new BinaryWriter(os);
for (var i = 0; i < fileLength; i++)
{
bw.Write(buffer[i]);
}
}
}
}
