public void Read_SurrogateBoundary()
{
using (SerialPort com1 = TCSupport.InitFirstSerialPort())
using (SerialPort com2 = TCSupport.InitSecondSerialPort(com1))
{
char[] charXmitBuffer = new char[32];
int result;
Debug.WriteLine("Verifying that Read(char[], int, int) works with reading surrogate characters");
TCSupport.GetRandomChars(charXmitBuffer, 0, charXmitBuffer.Length - 2, TCSupport.CharacterOptions.Surrogates);
charXmitBuffer[charXmitBuffer.Length - 2] = TCSupport.GenerateRandomHighSurrogate();
charXmitBuffer[charXmitBuffer.Length - 1] = TCSupport.GenerateRandomLowSurrogate();
com1.Encoding = System.Text.Encoding.Unicode;
com2.Encoding = System.Text.Encoding.Unicode;
com1.ReadTimeout = 500;
com1.Open();
if (!com2.IsOpen) //This is necessary since com1 and com2 might be the same port if we are using a loopback
{
com2.Open();
}
//[] First lets try with buffer size that is larger then what we are asking for
com2.Write(charXmitBuffer, 0, charXmitBuffer.Length);
TCSupport.WaitForExpected(() => com1.BytesToRead, charXmitBuffer.Length * 2,
5000, "Err_018158ajid BytesToRead");
var charRcvBuffer = new char[charXmitBuffer.Length];
result = com1.Read(charRcvBuffer, 0, charXmitBuffer.Length - 1);
Assert.Equal(charXmitBuffer.Length - 2, result);
char[] actualChars = new char[charXmitBuffer.Length];
Array.Copy(charRcvBuffer, 0, actualChars, 0, result);
result = com1.Read(actualChars, actualChars.Length - 2, 2);
Assert.Equal(2, result);
Assert.Equal(charXmitBuffer, actualChars);
//[] Next lets try with buffer size that is the same size as what we are asking for
com2.Write(charXmitBuffer, 0, charXmitBuffer.Length);
TCSupport.WaitForExpected(() => com1.BytesToRead, charXmitBuffer.Length * 2,
5000, "Err_018158ajid BytesToRead");
charRcvBuffer = new char[charXmitBuffer.Length - 1];
result = com1.Read(charRcvBuffer, 0, charXmitBuffer.Length - 1);
Assert.Equal(charXmitBuffer.Length - 2, result);
actualChars = new char[charXmitBuffer.Length];
Array.Copy(charRcvBuffer, 0, actualChars, 0, result);
result = com1.Read(actualChars, actualChars.Length - 2, 2);
Assert.Equal(2, result);
Assert.Equal(charXmitBuffer, actualChars);
}
}
