public void RoundTripTest()
{
for (int i = 0; i < transmittedMessage.Length; i++)
{
// message[i] must be elements of the field. If size = 16, field elements are 0 .. 15.
// rand.Next(0, 16) returns elements between 0 .. 15
transmittedMessage[i] = (byte)rand.Next(0, (int)fieldSize);
}
// ---- Encode the message ----
watch.Start();
encoder.Encode(transmittedMessage);
watch.Stop();
Array.Copy(transmittedMessage, receivedMessage, transmittedMessage.Length);
// ---- Corrupt the message ----
int corruptPosition;
for (int i = 0; i < maxCorruption; i++)
{
corruptPosition = rand.Next(0, receivedMessage.Length);
receivedMessage[corruptPosition] = (byte)rand.Next(0, (int)fieldSize);
}
// ---- Repair the message ----
watch.Start();
decoder.Decode(receivedMessage);
watch.Stop();
// ---- Compare ----
ArrayHelpers.CheckArrayEquals(transmittedMessage, receivedMessage);
}
private static void Compare(Stream left, Stream right)
{
int leftReadLen;
int rightReadLen;
byte[] leftBuffer = new byte[4096];
byte[] rightBuffer = new byte[4096];
while (true)
{
leftReadLen = left.Read(leftBuffer, 0, leftBuffer.Length);
rightReadLen = right.Read(rightBuffer, 0, rightBuffer.Length);
if (leftReadLen != rightReadLen)
{
throw new Exception();
}
if (leftReadLen == 0)
{
break;
}
ArrayHelpers.CheckArrayEquals(leftBuffer, rightBuffer);
}
}
public static void DecoderValidTest()
{
Rs256Decoder decoder = new Rs256Decoder( 16, 11, 0x13 );
byte[] message = { 12, 12, 3, 3, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1 };
byte[] cleanMessage = { 12, 12, 3, 3, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1 };
decoder.Decode( message );
ArrayHelpers.CheckArrayEquals( message, cleanMessage );
}
public static void EncoderTest()
{
Rs256Encoder encoder = new Rs256Encoder( 16, 11, 0x13 );
byte[] message = { 0, 0, 0, 0, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1 };
byte[] encodedMessage = { 12, 12, 3, 3, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1 };
encoder.Encode( message );
ArrayHelpers.CheckArrayEquals( message, encodedMessage );
}
public static void DecoderErrorTest()
{
Decoder decoder = new Decoder(16, 11, 4, 0x13);
// Note the errors: v v
int[] message = { 12, 12, 1, 3, 11, 10, 9, 8, 1, 6, 5, 4, 3, 2, 1 };
int[] cleanMessage = { 12, 12, 3, 3, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1 };
decoder.Decode(message);
ArrayHelpers.CheckArrayEquals(message, cleanMessage);
}
