public void Throw_SocketException_when_connection_is_closed() {
// Arrange
var fakesocket = new FakeSocket { Connected = false, ReceiveCallback = (buffer, offset, length) => { throw new SocketException(); } };
var callbacks = new PoolSocketCallbacks();
var poolsocket = new PoolSocket(fakesocket, callbacks.Reclaim);
// Act
try {
poolsocket.Receive(new byte[0], 0, 0);
Assert.Fail("didn't throw");
}
catch (SocketException ex) {
// Assert
Assert.AreEqual((int)SocketError.NotConnected, ex.ErrorCode);
}
}
public void Can_read_single_response_with_data_from_single_receive() {
// Arrange
var data = "blahblahblah";
var fakeSocket = new FakeSocket {
ReceiveCallback = Responses(
string.Format("OK FOO {0}\r\n{1}\r\n", data.Length, data)
)
};
// Act
var receiver = new ResponseReceiver(fakeSocket);
receiver.Reset(new Request("OK").ExpectData("OK"));
var response = receiver.GetResponse();
Assert.AreEqual("OK", response.Status);
// Assert
Assert.AreEqual(new[] { "FOO", data.Length.ToString() }, response.Arguments);
Assert.AreEqual(data, Encoding.ASCII.GetString(response.Data));
}
public void On_failure_PoolSocket_and_underlying_socket_are_disposed_and_reclaimed() {
// Arrange
var fakesocket = new FakeSocket { ReceiveCallback = (buffer, offset, length) => { throw new SocketException(); } };
var callbacks = new PoolSocketCallbacks();
var poolsocket = new PoolSocket(fakesocket, callbacks.Reclaim);
// Act
try {
poolsocket.Receive(new byte[0], 0, 0);
Assert.Fail("didn't throw");
} catch(SocketException) { }
// Assert
Assert.AreEqual(1, fakesocket.ReceiveCalled, "send called wrong number of times");
Assert.IsTrue(fakesocket.IsDisposed, "underlying socket wasn't disposed");
Assert.IsTrue(poolsocket.IsDisposed, "pool socket wasn't disposed");
Assert.AreEqual(1, callbacks.ReclaimCalled, "reclaim was called wrong number of times");
Assert.AreSame(fakesocket, callbacks.ReclaimedSocket, "underlying socket wasn't the one reclaimed");
}
public void Making_client_request_gets_socket_from_pool() {
// Arrange
var pool = new ConnectionPool(_factory.Create);
var socket = new FakeSocket {
ReceiveCallback = (buffer, size, offset) => {
var bytes = Encoding.ASCII.GetBytes("OK\r\n");
Array.Copy(bytes, buffer, bytes.Length);
return bytes.Length;
}
};
_factory.Builder = () => socket;
// Act
var client = new ClacksClient(pool);
client.Exec(Request.Create("HI"));
// Assert
Assert.AreEqual(1, _factory.Sockets.Count);
}
public void Can_read_single_response_with_many_data_chunks() {
// Arrange
var dataChunks = Enumerable.Repeat("a123456789", 15).ToArray();
var data = string.Concat(dataChunks);
dataChunks[dataChunks.Length - 1] = dataChunks[dataChunks.Length - 1] + "\r\n";
var fakeSocket = new FakeSocket {
ReceiveCallback = Responses(
new[] {string.Format("OK FOO {0}\r\n", data.Length)}
.Concat(dataChunks)
.ToArray()
)
};
// Act
var receiver = new ResponseReceiver(fakeSocket);
receiver.Reset(new Request("OK").ExpectData("OK"));
var response = receiver.GetResponse();
Assert.AreEqual("OK", response.Status);
// Assert
Assert.AreEqual(new[] { "FOO", data.Length.ToString() }, response.Arguments);
Assert.AreEqual(data, Encoding.ASCII.GetString(response.Data));
}
public void Reconnecting_client_retries_request_on_failure() {
// Arrange
var pool = new ConnectionPool(_factory.Create);
var failSocket = new FakeSocket();
failSocket.ReceiveCallback = (buffer, size, offset) => {
failSocket.Connected = false;
throw new SocketException(42);
};
var successSocket = new FakeSocket {
ReceiveCallback = (buffer, size, offset) => {
var bytes = Encoding.ASCII.GetBytes("OK\r\n");
Array.Copy(bytes, buffer, bytes.Length);
return bytes.Length;
}
};
_factory.Builder = () => _factory.Sockets.Any() ? successSocket : failSocket;
// Act
var client = new ClacksClient(pool);
var response = client.Exec(Request.Create("HI"));
// Assert
Assert.AreEqual(2, _factory.Sockets.Count);
Assert.AreEqual(1, failSocket.ReceiveCalled);
Assert.AreEqual(1, successSocket.ReceiveCalled);
Assert.AreEqual("OK", response.Status);
}
public void Client_recovers_if_connection_is_closed_by_remote_host() {
// Arrange
var pool = new ConnectionPool(_factory.Create);
var failSocket = new FakeSocket();
failSocket.ReceiveCallback = (buffer, size, offset) => {
// This happens when the other side hangs up the phone while we are still reading data
failSocket.Connected = true;
throw new SocketException((int)SocketError.ConnectionReset);
};
var successSocket = new FakeSocket {
ReceiveCallback = (buffer, size, offset) => {
var bytes = Encoding.ASCII.GetBytes("OK\r\n");
Array.Copy(bytes, buffer, bytes.Length);
return bytes.Length;
}
};
_factory.Builder = () => _factory.Sockets.Any() ? successSocket : failSocket;
// Act
var client = new ClacksClient(pool);
var response = client.Exec(Request.Create("HI"));
// Assert
Assert.AreEqual(2, _factory.Sockets.Count);
Assert.AreEqual(1, failSocket.ReceiveCalled);
Assert.AreEqual(1, successSocket.ReceiveCalled);
Assert.AreEqual("OK", response.Status);
}
public void Non_reconnecting_client_only_issues_request_once_if_not_failing() {
// Arrange
var pool = new ConnectionPool(_factory.Create);
var successSocket = new FakeSocket {
ReceiveCallback = (buffer, size, offset) => {
var bytes = Encoding.ASCII.GetBytes("OK\r\n");
Array.Copy(bytes, buffer, bytes.Length);
return bytes.Length;
}
};
_factory.Builder = () => successSocket;
// Act
var client = new ClacksClient(pool, attemptReconnect: false);
var response = client.Exec(Request.Create("HI"));
// Assert
Assert.AreEqual(1, _factory.Sockets.Count);
Assert.AreEqual(1, successSocket.ReceiveCalled);
Assert.AreEqual("OK", response.Status);
}
public void Non_reconnecting_client_does_not_retry_failed_request() {
// Arrange
var pool = new ConnectionPool(_factory.Create);
var failSocket = new FakeSocket();
failSocket.ReceiveCallback = (buffer, size, offset) => {
failSocket.Connected = false;
throw new SocketException(42);
};
var successSocket = new FakeSocket {
ReceiveCallback = (buffer, size, offset) => {
var bytes = Encoding.ASCII.GetBytes("OK\r\n");
Array.Copy(bytes, buffer, bytes.Length);
return bytes.Length;
}
};
_factory.Builder = () => _factory.Sockets.Any() ? successSocket : failSocket;
// Act
var client = new ClacksClient(pool, attemptReconnect: false);
try {
client.Exec(Request.Create("HI"));
Assert.Fail("call should not have succeeded");
} catch { }
// Assert
Assert.AreEqual(1, _factory.Sockets.Count);
Assert.AreEqual(1, failSocket.ReceiveCalled);
Assert.AreEqual(0, successSocket.ReceiveCalled);
}