public async Task Test_Good_Path(TimeClient_Rfc_868.ProtocolType protocol)
{
var host = new HostName("localhost");
var serverOptions = new TimeServer_Rfc_868.ServerOptions()
{
LoggingLevel = TimeServer_Rfc_868.ServerOptions.Verbosity.None
};
var clientOptions = new TimeClient_Rfc_868.ClientOptions()
{
LoggingLevel = TimeClient_Rfc_868.ClientOptions.Verbosity.None
};
using (var server = new TimeServer_Rfc_868(serverOptions))
{
bool serverOk = await server.StartAsync();
if (!serverOk)
{
Infrastructure.Error($"unable to start server");
return;
}
var client = new TimeClient_Rfc_868(clientOptions);
var result = await client.WriteAsync(host, serverOptions.Service, protocol);
if (!Infrastructure.IfTrueError(!result.Succeeded, "!result.Succeeded"))
{
Infrastructure.IfTrueError(result.Value == null, "result.Value is null");
Infrastructure.IfTrueError(result.Value != null && (result.Value.Length < 10 || result.Value.Length > 60), $"result.Value is weird size ({result.Value})");
}
Infrastructure.IfTrueError(result.TimeInSeconds < 0, $"result.TimeInSeconds too small ({result.TimeInSeconds})");
Infrastructure.IfTrueError(result.TimeInSeconds > 1.50, $"result.TimeInSeconds too large ({result.TimeInSeconds})");
}
}
public async Task Test_Bad_Service(TimeClient_Rfc_868.ProtocolType protocol)
{
var host = new HostName("localhost");
var serverOptions = new TimeServer_Rfc_868.ServerOptions()
{
LoggingLevel = TimeServer_Rfc_868.ServerOptions.Verbosity.None
};
var clientOptions = new TimeClient_Rfc_868.ClientOptions()
{
LoggingLevel = TimeClient_Rfc_868.ClientOptions.Verbosity.None
};
using (var server = new TimeServer_Rfc_868(serverOptions))
{
bool serverOk = await server.StartAsync();
if (!serverOk)
{
Infrastructure.Error($"unable to start server");
return;
}
var client = new TimeClient_Rfc_868(clientOptions);
var result = await client.WriteAsync(host, "79", protocol);
Infrastructure.IfTrueError(result.Succeeded, "result.Succeeded ");
Infrastructure.IfTrueError(!String.IsNullOrEmpty(result.Value), "result.Value is not null");
// ConnectionRefused is for TCP
// ConnectionResetByPeer is for UDP
Infrastructure.IfTrueError(result.Error != SocketErrorStatus.ConnectionRefused && result.Error != SocketErrorStatus.ConnectionResetByPeer, $"result.Error is wrong ({result.Error})");
}
}
public async Task Test_Bad_Host(TimeClient_Rfc_868.ProtocolType protocol)
{
var host = new HostName("invalid.host.doesnt.exist.example.com");
var clientOptions = new TimeClient_Rfc_868.ClientOptions()
{
LoggingLevel = TimeClient_Rfc_868.ClientOptions.Verbosity.None
};
var client = new TimeClient_Rfc_868(clientOptions);
var result = await client.WriteAsync(host, "10013", protocol);
Infrastructure.IfTrueError(result.Succeeded, "result.Succeeded ");
Infrastructure.IfTrueError(!String.IsNullOrEmpty(result.Value), "result.Value is not null");
Infrastructure.IfTrueError(result.Error != SocketErrorStatus.HostNotFound, $"result.Error is wrong ({result.Error})");
}
/// <summary>
/// System test, not a unit tests. Creates a server, pumps a bunch of requests at it,
/// and verifies that everything worked.
/// </summary>
/// <returns></returns>
public async Task Test_Stress(TimeClient_Rfc_868.ProtocolType protocol)
{
string pname = protocol.ToString();
const int NLOOP = 10;
const int NBUNCH = 50;
const double ALLOWED_TIME = 20.0; // Normally we expect everything to be fast. No so much for a stress test!
const int ALLOWED_CONN_RESET = (NLOOP * NBUNCH) * 5 / 100; // Allow 5% conn reset
int NBytesSent = 0; // In the Time protocol we never send any bytes, so this will stay at zero.
int NConnReset = 0;
var host = new HostName("localhost");
var serverOptions = new TimeServer_Rfc_868.ServerOptions()
{
LoggingLevel = TimeServer_Rfc_868.ServerOptions.Verbosity.None,
};
var clientOptions = new TimeClient_Rfc_868.ClientOptions()
{
LoggingLevel = TimeClient_Rfc_868.ClientOptions.Verbosity.None,
};
using (var server = new TimeServer_Rfc_868(serverOptions))
{
bool serverOk = await server.StartAsync();
if (!serverOk)
{
Infrastructure.Error($"Client: Stress: {pname} unable to start server");
return;
}
var start = DateTimeOffset.UtcNow;
var client = new TimeClient_Rfc_868(clientOptions);
for (int i = 0; i < NLOOP; i++)
{
if (i % 100 == 0 && i > 0)
{
Infrastructure.Log($"Client: Stress: {pname} starting loop {i} of {NLOOP}");
}
var allTasks = new Task <TimeClient_Rfc_868.TimeResult> [NBUNCH];
for (int j = 0; j < allTasks.Length; j++)
{
allTasks[j] = client.WriteAsync(host, serverOptions.Service, protocol);
}
await Task.WhenAll(allTasks);
for (int j = 0; j < allTasks.Length; j++)
{
var result = allTasks[j].Result;
if (!result.Succeeded && result.Error == SocketErrorStatus.ConnectionResetByPeer)
{
// Connection reset by peer is an error only if we get a bunch of them.
NConnReset++;
Infrastructure.IfTrueError(NConnReset > ALLOWED_CONN_RESET, $"Too many connection resets {NConnReset}");
}
else if (!Infrastructure.IfTrueError(!result.Succeeded, $"!result.Succeeded with error {result.Error.ToString()} for {pname}"))
{
Infrastructure.IfTrueError(result.Value == null, "result.Value is null");
if (result.Value != null && (result.Value.Length < 10 || result.Value.Length > 60))
{
;
}
Infrastructure.IfTrueError(result.Value != null && (result.Value.Length < 10 || result.Value.Length > 60), $"result.Value is weird size ({result.Value.Length}) for {pname}");
var correctTime = DateTimeOffset.UtcNow.ToUnixTimeSeconds();
var correctDelta = Math.Abs(result.UnixTimeSeconds - correctTime);
Infrastructure.IfTrueError(correctDelta > 5, $"Time is off; got {result.UnixTimeSeconds} but expected about {correctTime} delta is {correctDelta}");
}
Infrastructure.IfTrueError(result.TimeInSeconds < 0, $"result.TimeInSeconds too small {result.TimeInSeconds} for {pname}");
Infrastructure.IfTrueError(result.TimeInSeconds > ALLOWED_TIME, $"result.TimeInSeconds too large {result.TimeInSeconds} for {pname}");
}
await Task.Delay(300); //TODO: pause just to make the test runs easier to figure out
}
// timing data
var delta = DateTimeOffset.UtcNow.Subtract(start).TotalSeconds;
double timePerCall = delta / (double)(NLOOP * NBUNCH);
Infrastructure.Log($"Stress test average time: {NLOOP} {NBUNCH} {timePerCall} for {pname}");
// How's the server doing?
const int ExpectedCount = NLOOP * NBUNCH;
Infrastructure.IfTrueError(server.Stats.NConnections != ExpectedCount, $"Server got {server.Stats.NConnections} connections but expected {ExpectedCount} for {pname}");
int nr = server.Stats.NResponses;
Infrastructure.IfTrueError(server.Stats.NResponses != ExpectedCount, $"Server sent {server.Stats.NResponses} responses but expected {ExpectedCount} for {pname}");
// Why is the expected not equal to the NBytesSent? Because TCP has a weird timing thing:
// the server has to close down reading from the client relatively quickly and can't waste
// time for the client to send bytes that probably won't come.
var expectedMinBytes = protocol == TimeClient_Rfc_868.ProtocolType.Udp ? NBytesSent : NBytesSent / 2;
Infrastructure.IfTrueError(server.Stats.NBytes > NBytesSent, $"Server got {server.Stats.NBytes} bytes but expected {NBytesSent} for {pname}");
Infrastructure.IfTrueError(server.Stats.NBytes < expectedMinBytes, $"Server got {server.Stats.NBytes} bytes but expected {NBytesSent} with a minimum value of {expectedMinBytes} for {pname}");
Infrastructure.IfTrueError(server.Stats.NExceptions != 0, $"Server got {server.Stats.NExceptions} exceptions but expected {0} for {pname}");
}
}
