public async Task Writing()
{
var ms = new MemoryStream();
var muxer = new Muxer {
Channel = ms
};
var stream = new Substream {
Muxer = muxer
};
var m1 = new byte[1];
stream.AddData(new byte[] { 10 });
Assert.IsTrue(stream.CanRead);
Assert.IsTrue(stream.CanWrite);
Assert.AreEqual(1, await stream.ReadAsync(m1, 0, 1));
await stream.WriteAsync(m1, 0, 1);
stream.WriteByte(11);
await stream.FlushAsync();
ms.Position = 0;
var header = await Header.ReadAsync(ms);
var length = await Varint.ReadVarint32Async(ms);
var payload = new byte[length];
ms.Read(payload, 0, length);
Assert.AreEqual(stream.Id, header.StreamId);
Assert.AreEqual(2, payload.Length);
CollectionAssert.AreEqual(new byte[] { 10, 11 }, payload);
}
public async Task NewStream_Send()
{
var channel = new MemoryStream();
var muxer = new Muxer {
Channel = channel, Initiator = true
};
var nextId = muxer.NextStreamId;
var stream = await muxer.CreateStreamAsync("foo");
// Correct stream id is assigned.
Assert.AreEqual(nextId, stream.Id);
Assert.AreEqual(nextId + 2, muxer.NextStreamId);
Assert.AreEqual("foo", stream.Name);
// Substreams are managed.
Assert.AreEqual(1, muxer.Substreams.Count);
Assert.AreSame(stream, muxer.Substreams[stream.Id]);
// NewStream message is sent.
channel.Position = 0;
Assert.AreEqual(stream.Id << 3, channel.ReadVarint32());
Assert.AreEqual(3, channel.ReadVarint32());
var name = new byte[3];
channel.Read(name, 0, 3);
Assert.AreEqual("foo", Encoding.UTF8.GetString(name));
Assert.AreEqual(channel.Length, channel.Position);
}
public async Task AcquireWrite()
{
var muxer = new Muxer();
var tasks = new List <Task <string> >
{
Task <string> .Run(async() =>
{
using (await muxer.AcquireWriteAccessAsync())
{
await Task.Delay(100);
}
return("step 1");
}),
Task <string> .Run(async() =>
{
using (await muxer.AcquireWriteAccessAsync())
{
await Task.Delay(50);
}
return("step 2");
}),
};
var done = await Task.WhenAll(tasks);
Assert.AreEqual("step 1", done[0]);
Assert.AreEqual("step 2", done[1]);
}
public void Defaults()
{
var muxer = new Muxer();
Assert.AreEqual(true, muxer.Initiator);
Assert.AreEqual(false, muxer.Receiver);
}
public async Task CloseStream_Event()
{
var channel = new MemoryStream();
var muxer1 = new Muxer {
Channel = channel, Initiator = true
};
using (var foo = await muxer1.CreateStreamAsync("foo"))
using (var bar = await muxer1.CreateStreamAsync("bar"))
{
// open and close a stream.
}
channel.Position = 0;
var muxer2 = new Muxer {
Channel = channel
};
int closeCount = 0;
muxer2.SubstreamClosed += (s, e) =>
{
++closeCount;
};
await muxer2.ProcessRequestsAsync();
Assert.AreEqual(2, closeCount);
}
public void InitiatorReceiver()
{
var muxer = new Muxer {
Initiator = true
};
Assert.AreEqual(true, muxer.Initiator);
Assert.AreEqual(false, muxer.Receiver);
Assert.AreEqual(0, muxer.NextStreamId & 1);
muxer.Receiver = true;
Assert.AreEqual(false, muxer.Initiator);
Assert.AreEqual(true, muxer.Receiver);
Assert.AreEqual(1, muxer.NextStreamId & 1);
}
public async Task NewStream_Receive()
{
var channel = new MemoryStream();
var muxer1 = new Muxer {
Channel = channel, Initiator = true
};
var foo = await muxer1.CreateStreamAsync("foo");
var bar = await muxer1.CreateStreamAsync("bar");
channel.Position = 0;
var muxer2 = new Muxer {
Channel = channel
};
int n = 0;
muxer2.SubstreamCreated += (s, e) => ++ n;
await muxer2.ProcessRequestsAsync();
Assert.AreEqual(2, n);
}
public async Task NewStream_AlreadyAssigned()
{
var channel = new MemoryStream();
var muxer1 = new Muxer {
Channel = channel, Initiator = true
};
var foo = await muxer1.CreateStreamAsync("foo");
var muxer2 = new Muxer {
Channel = channel, Initiator = true
};
var bar = await muxer2.CreateStreamAsync("bar");
channel.Position = 0;
var muxer3 = new Muxer {
Channel = channel
};
await muxer3.ProcessRequestsAsync(new CancellationTokenSource(500).Token);
// The channel is closed because of 2 new streams with same id.
Assert.IsFalse(channel.CanRead);
Assert.IsFalse(channel.CanWrite);
}