public async Task Test_Bad_Service(CharGenClient_Rfc_864.ProtocolType protocol) { var host = new HostName("localhost"); var serverOptions = new CharGenServer_Rfc_864.ServerOptions() { LoggingLevel = CharGenServer_Rfc_864.ServerOptions.Verbosity.None }; var clientOptions = new CharGenClient_Rfc_864.ClientOptions() { LoggingLevel = CharGenClient_Rfc_864.ClientOptions.Verbosity.None }; using (var server = new CharGenServer_Rfc_864(serverOptions)) { bool serverOk = await server.StartAsync(); if (!serverOk) { Infrastructure.Error($"unable to start server"); return; } var client = new CharGenClient_Rfc_864(clientOptions); var result = await client.WriteAsync(host, "79", protocol, "WontCauseAnyTraffic"); Infrastructure.IfTrueError(result.Succeeded != CharGenClient_Rfc_864.CharGenResult.State.Failed, "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(CharGenClient_Rfc_864.ProtocolType protocol) { var host = new HostName("invalid.host.doesnt.exist.example.com"); var clientOptions = new CharGenClient_Rfc_864.ClientOptions() { LoggingLevel = CharGenClient_Rfc_864.ClientOptions.Verbosity.None }; var client = new CharGenClient_Rfc_864(clientOptions); var result = await client.WriteAsync(host, "10013", protocol, "ABCDEF"); Infrastructure.IfTrueError(result.Succeeded != CharGenClient_Rfc_864.CharGenResult.State.Failed, "result.Succeeded "); Infrastructure.IfTrueError(!String.IsNullOrEmpty(result.Value), "result.Value is not null"); Infrastructure.IfTrueError(result.Error != SocketErrorStatus.HostNotFound, $"result.Error is wrong ({result.Error})"); }
/// <summary> /// System test, not a unit tests. Creates a server, pumps a bunch of requests at it, /// and verifies that everything worked. /// </summary> /// <returns></returns> public async Task Test_Stress(CharGenClient_Rfc_864.ProtocolType protocol) { string pname = protocol.ToString(); const int NLOOP = 4; const int NBUNCH = 10; const double ALLOWED_TIME = 20.0; // Normally we expect everything to be fast. No so much for a stress test! const int ALLOWED_CONN_RESET = (NLOOP * NBUNCH) * 5 / 100; // Allow 5% conn reset const int ALLOWED_EXCEPTION = (NLOOP * NBUNCH) * 5 / 100; // allow 5% exception on server int NBytesWrite = 0; int NConnReset = 0; var host = new HostName("localhost"); var serverOptions = new CharGenServer_Rfc_864.ServerOptions() { OutputPattern = CharGenServer_Rfc_864.ServerOptions.PatternType.Fixed, LoggingLevel = CharGenServer_Rfc_864.ServerOptions.Verbosity.None, }; var clientOptions = new CharGenClient_Rfc_864.ClientOptions() { LoggingLevel = CharGenClient_Rfc_864.ClientOptions.Verbosity.None, }; using (var server = new CharGenServer_Rfc_864(serverOptions)) { bool serverOk = await server.StartAsync(); if (!serverOk) { Infrastructure.Error($"Client: Stress: {pname} unable to start server"); return; } var expected = CharGenServer_Rfc_864.GetSampleReturn(); var start = DateTimeOffset.UtcNow; for (int bigLoop = 0; bigLoop < NLOOP; bigLoop++) { if (bigLoop % 100 == 0 && bigLoop > 0) { Infrastructure.Log($"Client: Stress: {pname} starting loop {bigLoop} of {NLOOP}"); } var allClients = new CharGenClient_Rfc_864[NBUNCH]; var allWriteTasks = new Task <CharGenClient_Rfc_864.CharGenResult> [NBUNCH]; for (int i = 0; i < NBUNCH; i++) { var send = $"ABC-Loop {bigLoop} Item {i}"; // This is sent and ignored by the server. NBytesWrite += send.Length; allClients[i] = new CharGenClient_Rfc_864(clientOptions); allWriteTasks[i] = allClients[i].WriteAsync(host, serverOptions.Service, protocol, send); } await Task.WhenAll(allWriteTasks); await Task.Delay(100); //TODO: magic number // TCP has to wait for the close to happen. Task <CharGenClient_Rfc_864.CharGenResult>[] allCloseTasks = null; if (protocol == CharGenClient_Rfc_864.ProtocolType.Tcp) { allCloseTasks = new Task <CharGenClient_Rfc_864.CharGenResult> [NBUNCH]; for (int i = 0; i < NBUNCH; i++) { allCloseTasks[i] = allClients[i].CloseAsync(); } await Task.WhenAll(allCloseTasks); } for (int i = 0; i < NBUNCH; i++) { var result = protocol == CharGenClient_Rfc_864.ProtocolType.Tcp ? allCloseTasks[i].Result : allWriteTasks[i].Result; var didSucceed = result.Succeeded == CharGenClient_Rfc_864.CharGenResult.State.Succeeded; if (!didSucceed && 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(!didSucceed, $"!result.Succeeded with error {result.Error.ToString()} for {pname}")) { Infrastructure.IfTrueError(result.Value == null, "result.Value is null"); if (result.Value != null) { double nreads = (double)result.Value.Length / (double)expected.Length; int nreadsInt = (int)Math.Round(nreads); Infrastructure.IfTrueError(nreadsInt == 0, $"Got no data back for {pname}"); Infrastructure.IfTrueError(nreadsInt != nreads, $"Got partial read {nreads} for {pname}"); Infrastructure.IfTrueError(nreads > 5, $"Got {nreads} reads for {pname}"); //Infrastructure.IfTrueError(result.Value != null && (result.Value.Length < 10 || result.Value.Length > 60), $"result.Value is weird size ({result.Value.Length}) for {pname}"); } } Infrastructure.IfTrueError(result.TimeInSeconds < -1, $"result.TimeInSeconds too small {result.TimeInSeconds} for {pname}"); Infrastructure.IfTrueError(result.TimeInSeconds > ALLOWED_TIME, $"result.TimeInSeconds too large {result.TimeInSeconds} for {pname}"); } await Task.Delay(300); //NOTE: pause just to make the test runs easier to figure out } // timing data var delta = DateTimeOffset.UtcNow.Subtract(start).TotalSeconds; double timePerCall = delta / (double)(NLOOP * NBUNCH); Infrastructure.Log($"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}"); 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 == CharGenClient_Rfc_864.ProtocolType.Udp ? NBytesWrite : NBytesWrite / 4; Infrastructure.IfTrueError(server.Stats.NBytesRead > NBytesWrite, $"Server got {server.Stats.NBytesRead} bytes but expected {NBytesWrite} for {pname}"); Infrastructure.IfTrueError(server.Stats.NBytesRead < expectedMinBytes, $"Server got {server.Stats.NBytesRead} bytes but expected {NBytesWrite} with a minimum value of {expectedMinBytes} for {pname}"); Infrastructure.IfTrueError(server.Stats.NExceptions > ALLOWED_EXCEPTION, $"Server got {server.Stats.NExceptions} exceptions but expected no more than {ALLOWED_EXCEPTION} for {pname}"); } }