private void PerformReadOnCom1FromCom2(SerialPort com1, SerialPort com2, char[] expectedChars, char[] rcvBuffer, int offset, int count)
{
char[] buffer = new char[expectedChars.Length];
char[] oldRcvBuffer = (char[])rcvBuffer.Clone();
int numBytesWritten = com1.Encoding.GetByteCount(expectedChars);
int totalBytesRead = 0;
int totalCharsRead = 0;
while (true)
{
int charsRead;
try
{
charsRead = com1.Read(rcvBuffer, offset, count);
}
catch (TimeoutException)
{
break;
}
// While there are more characters to be read
int bytesRead = com1.Encoding.GetByteCount(rcvBuffer, offset, charsRead);
totalBytesRead += bytesRead;
if (expectedChars.Length < totalCharsRead + charsRead)
{
//If we have read in more characters than we expect
//1<DEBUG>
Debug.WriteLine("count={0}, charsRead={1} expectedChars.Length={2}, totalCharsRead={3}", count, charsRead, expectedChars.Length, totalCharsRead);
Debug.WriteLine("rcvBuffer");
TCSupport.PrintChars(rcvBuffer);
Debug.WriteLine("\nexpectedChars");
TCSupport.PrintChars(expectedChars);
//1</DEBUG>
Fail("ERROR!!!: We have received more characters then were sent");
}
if (count != charsRead &&
(count < charsRead ||
((expectedChars.Length - totalCharsRead) != charsRead &&
!TCSupport.IsSurrogate(expectedChars[totalCharsRead + charsRead]))))
{
//If we have not read all of the characters that we should have
//1<DEBUG>
Debug.WriteLine("count={0}, charsRead={1} expectedChars.Length={2}, totalCharsRead={3}", count, charsRead, expectedChars.Length, totalCharsRead);
Debug.WriteLine("rcvBuffer");
TCSupport.PrintChars(rcvBuffer);
Debug.WriteLine("\nexpectedChars");
TCSupport.PrintChars(expectedChars);
//1</DEBUG>
Fail("ERROR!!!: Read did not return all of the characters that were in SerialPort buffer");
}
VerifyBuffer(rcvBuffer, oldRcvBuffer, offset, charsRead);
Array.Copy(rcvBuffer, offset, buffer, totalCharsRead, charsRead);
totalCharsRead += charsRead;
Assert.Equal(numBytesWritten - totalBytesRead, com1.BytesToRead);
oldRcvBuffer = (char[])rcvBuffer.Clone();
}
VerifyBuffer(rcvBuffer, oldRcvBuffer, 0, rcvBuffer.Length);
//Compare the chars that were written with the ones we expected to read
for (int i = 0; i < expectedChars.Length; i++)
{
if (expectedChars[i] != buffer[i])
{
Fail("ERROR!!!: Expected to read {0} actual read {1} at {2}", (int)expectedChars[i], (int)buffer[i], i);
}
}
Assert.Equal(0, com1.BytesToRead);
}
