public void ReadWrite_WithWriteReadWrite_HasExpectedBuffer()
{
// Assign
var stream = new CircularStream(BufferInitialSize);
// Act
var bufferStub1 = CreateByteArray(4, 12);
stream.Write(bufferStub1, 0, bufferStub1.Length);
var bufferOut = new byte[6];
stream.Read(bufferOut, 0, bufferOut.Length);
var bufferStub2 = CreateByteArray(6, 6);
stream.Write(bufferStub2, 0, bufferStub2.Length);
var bufferRemains = stream.ToArray();
// Assert
const string expected = "6600004444446666";
var actual = bufferRemains.GetString();
Assert.Equal(expected, actual);
}
public void ReadWrite_With2SequentialCalls_HasExpectedBuffer()
{
// Assign
var stream = new CircularStream(BufferInitialSize);
// Act
var bufferStub = CreateByteArray(4, 6);
stream.Write(bufferStub, 0, bufferStub.Length);
stream.Write(bufferStub, 0, bufferStub.Length);
var bufferRemains = stream.ToArray();
// Assert
const string expected = "4444444444440000";
var actual = bufferRemains.GetString();
Assert.Equal(expected, actual);
}
public void Read_ReadLessThanBufferLength_ReturnsSomeOfTheBuffer()
{
// Arrange
var uut = new CircularStream(2);
uut.Write(new byte[] { 0, 1 }, 0, 2);
var result = new byte[1];
// Act
uut.Read(result, 0, 1);
// Assert
Assert.AreEqual(1, result.Length);
Assert.AreEqual(0, result[0]);
}
public void Write_DoNotCompletelyFillBuffer_ReturnsJustWhatIsWritten()
{
// Arrange
var uut = new CircularStream(2);
var bytesToWrite = new Byte[] { 0 };
// Act
uut.Write(bytesToWrite, 111, 222);
var result = new Byte[1];
uut.Read(result, 0, 1);
// Assert
Assert.AreEqual(1, result.Length);
Assert.AreEqual(0, result[0]);
}
public void Write_FillPastBuffer_ReturnsJustLengthOfBuffer()
{
// Arrange
var uut = new CircularStream(2);
var bytesToWrite = new Byte[] { 0, 1, 2, 3 };
// Act
uut.Write(bytesToWrite, 111, 222);
var result = new Byte[2];
uut.Read(result, 0, 2);
// Assert
Assert.AreEqual(2, result.Length);
Assert.AreEqual(2, result[0]);
Assert.AreEqual(3, result[1]);
}
public void Read_PastBuffer_ReturnsCircularly()
{
// Arrange
var uut = new CircularStream(2);
uut.Write(new byte[] { 0, 1 }, 0, 2);
var result = new byte[4];
// Act
uut.Read(result, 0, 4);
// Assert
Assert.AreEqual(4, result.Length);
Assert.AreEqual(0, result[0]);
Assert.AreEqual(1, result[1]);
Assert.AreEqual(0, result[2]);
Assert.AreEqual(1, result[3]);
}
public void Write_FillBuffer_WritesToBuffer()
{
// Arrange
var uut = new CircularStream(5);
var bytesToWrite = new Byte[] { 0, 1, 2, 3, 4 };
// Act
uut.Write(bytesToWrite, 111, 222);
var result = new Byte[5];
uut.Read(result, 0, 5);
// Assert
Assert.AreEqual(0, result[0]);
Assert.AreEqual(1, result[1]);
Assert.AreEqual(2, result[2]);
Assert.AreEqual(3, result[3]);
Assert.AreEqual(4, result[4]);
}
public void Read_FillBuffer_WritesToBuffer()
{
// Arrange
var uut = new CircularStream(5);
uut.Write(new byte[] { 0, 1, 2, 3, 4 }, 0, 5);
var result = new byte[5];
// Act
uut.Read(result, 0, 5);
// Assert
Assert.AreEqual(5, result.Length);
Assert.AreEqual(0, result[0]);
Assert.AreEqual(1, result[1]);
Assert.AreEqual(2, result[2]);
Assert.AreEqual(3, result[3]);
Assert.AreEqual(4, result[4]);
}
public async void Read_WithWriteCallAfter_DoesNotThrowTimeoutException()
{
// Assign
var stream = new CircularStream(BufferInitialSize, true, ReadMode.Wait, 1000);
// Act
var bufferOut = new byte[6];
var readTask = Task.Run(() => stream.Read(bufferOut, 0, bufferOut.Length));
var bufferStub = CreateByteArray(4, 6);
stream.Write(bufferStub, 0, bufferStub.Length);
int bytesRead = await readTask;
var bufferRemains = stream.ToArray();
// Assert
const string expected = "4444440000000000";
var actual = bufferRemains.GetString();
Assert.Equal(expected, actual);
Assert.Equal(bufferOut.Length, bytesRead);
}
private void OnDataReceive(IAsyncResult result)
{
lock (this)
{
int bytesRead = this.connection.EndReceive(result);
if (bytesRead > 0)
{
// shove data into memory stream
circStream.Write(this.receiveBuffer, 0, bytesRead);
// get raw data from circular stream
byte[] rawData = new byte[circStream.DataAvailable];
circStream.Read(rawData, 0, rawData.Length);
// split the message into composite messages
string rawMessage = System.Text.Encoding.ASCII.GetString(rawData);
string subMessage = string.Empty;
int position = 0;
while (position < rawMessage.Length)
{
// see if we have enough to determine the message code
if (rawMessage.Length - position >= 3)
{
string messageCode = rawMessage.Substring(position, 3);
if (messageCode == "MSG")
{
// if its a MSG, then read until the length is satified
Regex.Regex regex = new Regex.Regex(@"MSG\s+\S+\s+\S+\s+(?<length>\d+)");
Regex.Match match = regex.Match(rawMessage.Substring(position));
if (match.Success)
{
int length = int.Parse(match.Groups["length"].Value);
int endOfHeader = rawMessage.IndexOf("\r\n", position);
if (endOfHeader >= 0 && position + endOfHeader + length + 2 <= rawMessage.Length)
{
subMessage = rawMessage.Substring(position, endOfHeader + length + 2 - position);
}
else
{
this.SetToDataStream(rawMessage.Substring(position));
break;
}
}
else
{
// we didnt get enough of the string to determine the message length -
// set it to the data stream and wait till the next rush of data
this.SetToDataStream(rawMessage.Substring(position));
break;
}
}
else
{
// otherwise it isnt a MSG, so read up until the first \r\n
int newPosition = rawMessage.IndexOf("\r\n", position);
if (newPosition < 0)
{
// we dont have the entire message - clear out the left over data stream
// and add the incomplete message to the stream
this.SetToDataStream(rawMessage.Substring(position));
break;
}
else
{
newPosition += 2;
subMessage = rawMessage.Substring(position, newPosition - position);
}
}
}
else
{
// we dont even have enough to determine the message code - add it to the data stream
// and forget about it
this.SetToDataStream(rawMessage.Substring(position));
break;
}
position += subMessage.Length;
this.protocol.control.WriteDebug("-----------------------------------------");
this.protocol.control.WriteDebug("Received");
this.protocol.control.WriteDebug(subMessage);
this.protocol.control.WriteDebug("-----------------------------------------");
Message message = new Message(subMessage);
switch (message.Code)
{
case "CHL":
{
// we received a challenge. Respond to it appropriately.
string hash = message.Arguments;
// md5 encrypt hash
hash += md5MagicHash;
MD5Encryption encryption = new MD5Encryption();
string md5hash = encryption.Encrypt(hash);
Message responseMessage = Message.ConstructMessage("QRY", @"[email protected] 32" + "\r\n" + md5hash);
this.SendMessage(responseMessage, false);
}
break;
}
try
{
// see if theres a transaction ID registered with it
if (this.transactionEvents.Contains(message.TransactionID))
{
Pair pair = (Pair)this.transactionEvents[message.TransactionID];
((ResponseReceivedHandler)pair.First)(this, message, pair.Second);
}
// else check if the code is registered
else if (this.codeEvents.Contains(message.Code))
{
Pair pair = (Pair)this.codeEvents[message.Code];
((ResponseReceivedHandler)pair.First)(this, message, pair.Second);
}
// otherwise uses the default message sink
else
{
if (defaultMessageSink != null)
{
defaultMessageSink(this, message, null);
}
}
}
catch
{}
}
try
{
// restart async call
this.connection.BeginReceive(receiveBuffer, new AsyncCallback(OnDataReceive), null);
}
catch
{
this.onDisconnect(this, null, null);
}
}
else if (!ExpectingDisconnection)
{
this.onDisconnect(this, null, null);
}
}
}
