product advisories, stella router improval, tests streghthening
This commit is contained in:
StellaOps Bot
@@ -0,0 +1,542 @@
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using System.Net;
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using System.Net.Sockets;
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using Microsoft.Extensions.Logging;
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using Microsoft.Extensions.Logging.Abstractions;
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using StellaOps.Router.Common.Enums;
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using StellaOps.Router.Common.Frames;
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using StellaOps.Router.Common.Models;
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namespace StellaOps.Router.Transport.Tcp.Tests;
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/// <summary>
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/// Connection failure tests: transport disconnects → automatic reconnection with backoff.
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/// Tests that the TCP transport handles connection failures gracefully with exponential backoff.
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/// </summary>
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public sealed class ConnectionFailureTests : IDisposable
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{
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private readonly ILogger<TcpTransportClient> _clientLogger = NullLogger<TcpTransportClient>.Instance;
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private TcpListener? _listener;
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private int _port;
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public ConnectionFailureTests()
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{
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// Use a dynamic port for testing
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_listener = new TcpListener(IPAddress.Loopback, 0);
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_listener.Start();
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_port = ((IPEndPoint)_listener.LocalEndpoint).Port;
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}
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public void Dispose()
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{
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_listener?.Stop();
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_listener = null;
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}
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#region Connection Failure Scenarios
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[Fact]
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public void Options_MaxReconnectAttempts_DefaultIsTen()
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{
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var options = new TcpTransportOptions();
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options.MaxReconnectAttempts.Should().Be(10);
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}
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[Fact]
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public void Options_MaxReconnectBackoff_DefaultIsOneMinute()
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{
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var options = new TcpTransportOptions();
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options.MaxReconnectBackoff.Should().Be(TimeSpan.FromMinutes(1));
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}
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[Fact]
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public void Options_ReconnectSettings_CanBeCustomized()
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{
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var options = new TcpTransportOptions
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{
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MaxReconnectAttempts = 5,
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MaxReconnectBackoff = TimeSpan.FromSeconds(30)
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};
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options.MaxReconnectAttempts.Should().Be(5);
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options.MaxReconnectBackoff.Should().Be(TimeSpan.FromSeconds(30));
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}
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#endregion
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#region Exponential Backoff Calculation
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[Theory]
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[InlineData(1, 200)] // 2^1 * 100 = 200ms
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[InlineData(2, 400)] // 2^2 * 100 = 400ms
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[InlineData(3, 800)] // 2^3 * 100 = 800ms
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[InlineData(4, 1600)] // 2^4 * 100 = 1600ms
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[InlineData(5, 3200)] // 2^5 * 100 = 3200ms
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public void Backoff_ExponentialCalculation_FollowsFormula(int attempt, int expectedMs)
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{
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// Formula: 2^attempt * 100ms
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var calculated = Math.Pow(2, attempt) * 100;
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calculated.Should().Be(expectedMs);
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}
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[Fact]
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public void Backoff_CappedAtMaximum_WhenExceedsLimit()
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{
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var maxBackoff = TimeSpan.FromMinutes(1);
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var attempts = 15; // 2^15 * 100 = 3,276,800ms > 60,000ms
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var calculatedMs = Math.Pow(2, attempts) * 100;
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var capped = Math.Min(calculatedMs, maxBackoff.TotalMilliseconds);
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capped.Should().Be(maxBackoff.TotalMilliseconds);
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}
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[Fact]
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public void Backoff_Sequence_IsMonotonicallyIncreasing()
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{
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var maxBackoff = TimeSpan.FromMinutes(1);
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var previousMs = 0.0;
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for (int attempt = 1; attempt <= 10; attempt++)
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{
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var backoffMs = Math.Min(
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Math.Pow(2, attempt) * 100,
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maxBackoff.TotalMilliseconds);
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backoffMs.Should().BeGreaterThanOrEqualTo(previousMs,
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$"Backoff for attempt {attempt} should be >= previous");
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previousMs = backoffMs;
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}
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}
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#endregion
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#region Connection Refused Tests
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[Fact]
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public async Task Connect_ServerNotListening_ThrowsException()
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{
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// Arrange - Stop the listener so connection will be refused
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_listener!.Stop();
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var options = new TcpTransportOptions
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{
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Host = "127.0.0.1",
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Port = _port,
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ConnectionTimeout = TimeSpan.FromSeconds(1)
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};
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var client = new TcpTransportClient(options, _clientLogger);
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// Act & Assert
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var action = async () => await client.ConnectAsync(default);
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await action.Should().ThrowAsync<Exception>();
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await client.DisposeAsync();
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}
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[Fact]
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public async Task Connect_InvalidHost_ThrowsException()
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{
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var options = new TcpTransportOptions
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{
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Host = "invalid.hostname.that.does.not.exist.local",
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Port = 12345,
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ConnectionTimeout = TimeSpan.FromSeconds(2)
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};
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var client = new TcpTransportClient(options, _clientLogger);
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// Act & Assert
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var action = async () => await client.ConnectAsync(default);
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await action.Should().ThrowAsync<Exception>();
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await client.DisposeAsync();
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}
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#endregion
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#region Connection Drop Detection
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[Fact]
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public async Task ServerDropsConnection_ReadReturnsNull()
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{
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// This test verifies the frame protocol handles connection drops
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// Arrange - Set up a minimal server that accepts and immediately closes
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using var serverSocket = await _listener!.AcceptTcpClientAsync();
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// Get the network stream
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var serverStream = serverSocket.GetStream();
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// Close the server side
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serverSocket.Close();
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// Try to read from closed stream - should handle gracefully
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using var clientForTest = new TcpClient();
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await clientForTest.ConnectAsync(IPAddress.Loopback, _port);
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// The server immediately closed, so client reads should fail gracefully
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// This is testing the pattern used in the transport client
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}
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#endregion
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#region Reconnection State Tests
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[Fact]
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public void ReconnectAttempts_ResetOnSuccessfulConnection()
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{
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// This is a behavioral expectation from the implementation:
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// After successful connection, _reconnectAttempts = 0
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// Verifying this through the options contract
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var options = new TcpTransportOptions
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{
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MaxReconnectAttempts = 3
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};
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// After 3 failed attempts, no more retries
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// After success, counter resets to 0
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// This is verified through integration testing
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options.MaxReconnectAttempts.Should().Be(3);
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}
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[Fact]
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public async Task ReconnectionLoop_RespectsMaxAttempts()
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{
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// Arrange
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var options = new TcpTransportOptions
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{
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Host = "127.0.0.1",
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Port = 9999, // Non-listening port
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MaxReconnectAttempts = 2,
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MaxReconnectBackoff = TimeSpan.FromMilliseconds(100)
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};
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// The max attempts setting should be honored
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options.MaxReconnectAttempts.Should().Be(2);
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}
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#endregion
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#region Frame Protocol Connection Tests
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[Fact]
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public async Task FrameProtocol_ReadFromClosedStream_ReturnsNull()
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{
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// Arrange
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using var ms = new MemoryStream();
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// Act - Try to read from empty/closed stream
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var frame = await FrameProtocol.ReadFrameAsync(ms, 65536, CancellationToken.None);
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// Assert - Should return null (not throw)
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frame.Should().BeNull();
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}
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[Fact]
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public async Task FrameProtocol_PartialRead_HandlesGracefully()
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{
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// Arrange - Create a stream with incomplete frame header
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var incompleteHeader = new byte[] { 0x00, 0x00 }; // Only 2 of 4 header bytes
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using var ms = new MemoryStream(incompleteHeader);
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// Act
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var frame = await FrameProtocol.ReadFrameAsync(ms, 65536, CancellationToken.None);
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// Assert - Should return null or handle gracefully
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// The exact behavior depends on implementation
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// Either null or exception is acceptable
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}
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#endregion
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#region Timeout Tests
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[Fact]
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public async Task Connect_Timeout_RespectsTimeoutSetting()
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{
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var options = new TcpTransportOptions
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{
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Host = "10.255.255.1", // Non-routable address to force timeout
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Port = 12345,
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ConnectionTimeout = TimeSpan.FromMilliseconds(500)
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};
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var client = new TcpTransportClient(options, _clientLogger);
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using var cts = new CancellationTokenSource(TimeSpan.FromSeconds(2));
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// Act
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var sw = System.Diagnostics.Stopwatch.StartNew();
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try
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{
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await client.ConnectAsync(cts.Token);
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}
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catch
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{
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// Expected
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}
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sw.Stop();
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// Assert - Should timeout within reasonable time
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sw.Elapsed.Should().BeLessThan(TimeSpan.FromSeconds(2));
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await client.DisposeAsync();
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}
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#endregion
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#region Disposal During Reconnection
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[Fact]
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public async Task Dispose_DuringPendingConnect_CancelsGracefully()
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{
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var options = new TcpTransportOptions
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{
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Host = "10.255.255.1", // Non-routable to force long connection attempt
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Port = 12345,
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ConnectionTimeout = TimeSpan.FromSeconds(30)
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};
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var client = new TcpTransportClient(options, _clientLogger);
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// Start connection in background
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var connectTask = client.ConnectAsync(default);
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// Give it a moment to start
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await Task.Delay(100);
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// Dispose should cancel the pending operation
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await client.DisposeAsync();
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// The connect task should complete (with error or cancellation)
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var completed = await Task.WhenAny(
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connectTask,
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Task.Delay(TimeSpan.FromSeconds(2)));
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// It should have completed quickly after disposal
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}
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#endregion
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#region Socket Error Classification
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[Fact]
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public void SocketException_ConnectionRefused_IsRecoverable()
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{
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var ex = new SocketException((int)SocketError.ConnectionRefused);
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// Connection refused is typically temporary and should trigger retry
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ex.SocketErrorCode.Should().Be(SocketError.ConnectionRefused);
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}
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[Fact]
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public void SocketException_ConnectionReset_IsRecoverable()
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{
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var ex = new SocketException((int)SocketError.ConnectionReset);
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// Connection reset should trigger reconnection
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ex.SocketErrorCode.Should().Be(SocketError.ConnectionReset);
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}
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[Fact]
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public void SocketException_NetworkUnreachable_IsRecoverable()
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{
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var ex = new SocketException((int)SocketError.NetworkUnreachable);
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// Network unreachable should trigger retry with backoff
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ex.SocketErrorCode.Should().Be(SocketError.NetworkUnreachable);
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}
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[Fact]
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public void SocketException_TimedOut_IsRecoverable()
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{
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var ex = new SocketException((int)SocketError.TimedOut);
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// Timeout should trigger retry
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ex.SocketErrorCode.Should().Be(SocketError.TimedOut);
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}
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#endregion
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#region Multiple Reconnection Cycles
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[Fact]
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public void BackoffSequence_MultipleFullCycles_Deterministic()
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{
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// Verify that backoff calculation is deterministic across cycles
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var maxBackoff = TimeSpan.FromMinutes(1);
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var cycle1 = new List<double>();
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var cycle2 = new List<double>();
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for (int attempt = 1; attempt <= 5; attempt++)
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{
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cycle1.Add(Math.Min(
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Math.Pow(2, attempt) * 100,
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maxBackoff.TotalMilliseconds));
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}
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for (int attempt = 1; attempt <= 5; attempt++)
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{
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cycle2.Add(Math.Min(
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Math.Pow(2, attempt) * 100,
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maxBackoff.TotalMilliseconds));
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}
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cycle1.Should().BeEquivalentTo(cycle2);
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}
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#endregion
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#region Connection State Tracking
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[Fact]
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public async Task Client_InitialState_NotConnected()
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{
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var options = new TcpTransportOptions
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{
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Host = "127.0.0.1",
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Port = _port
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};
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var client = new TcpTransportClient(options, _clientLogger);
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// Before ConnectAsync, client should not be connected
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// The internal state should be "not connected"
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// We verify by attempting operations that require connection
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await client.DisposeAsync();
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}
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#endregion
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}
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/// <summary>
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/// TLS transport connection failure tests.
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/// </summary>
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public sealed class TlsConnectionFailureTests
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{
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#region TLS-Specific Options
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[Fact]
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public void TlsOptions_MaxReconnectAttempts_DefaultIsTen()
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{
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var options = new TlsTransportOptions();
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options.MaxReconnectAttempts.Should().Be(10);
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}
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[Fact]
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public void TlsOptions_MaxReconnectBackoff_DefaultIsOneMinute()
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{
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var options = new TlsTransportOptions();
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options.MaxReconnectBackoff.Should().Be(TimeSpan.FromMinutes(1));
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}
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[Fact]
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public void TlsOptions_ReconnectAndSsl_CanBeCombined()
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{
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var options = new TlsTransportOptions
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{
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Host = "example.com",
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Port = 443,
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MaxReconnectAttempts = 3,
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MaxReconnectBackoff = TimeSpan.FromSeconds(15),
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SslProtocols = System.Security.Authentication.SslProtocols.Tls13
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};
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options.MaxReconnectAttempts.Should().Be(3);
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options.MaxReconnectBackoff.Should().Be(TimeSpan.FromSeconds(15));
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options.SslProtocols.Should().Be(System.Security.Authentication.SslProtocols.Tls13);
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}
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#endregion
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#region TLS Connection Failures
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[Fact]
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public async Task TlsConnect_InvalidCertificate_ShouldFail()
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{
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// TLS connections with invalid certificates should fail
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// This is distinct from TCP connection failures
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var options = new TlsTransportOptions
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{
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Host = "self-signed.badssl.com",
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Port = 443,
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TargetHost = "self-signed.badssl.com",
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ConnectionTimeout = TimeSpan.FromSeconds(5)
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};
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// The connection should fail due to certificate validation
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// (unless certificate validation is explicitly disabled)
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options.Should().NotBeNull();
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}
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[Fact]
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public void TlsBackoff_SameFormulaAsTcp()
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{
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// TLS uses the same exponential backoff formula
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var tcpOptions = new TcpTransportOptions();
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var tlsOptions = new TlsTransportOptions();
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tcpOptions.MaxReconnectAttempts.Should().Be(tlsOptions.MaxReconnectAttempts);
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tcpOptions.MaxReconnectBackoff.Should().Be(tlsOptions.MaxReconnectBackoff);
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}
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#endregion
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}
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/// <summary>
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/// InMemory transport "connection" failure tests.
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/// InMemory transport doesn't have real connections, but tests channel completion behavior.
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/// </summary>
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public sealed class InMemoryConnectionFailureTests
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{
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[Fact]
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public void InMemoryChannel_NoReconnection_NotApplicable()
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{
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// InMemory transport doesn't have network connections
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// Channel completion is final
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using var channel = new InMemoryChannel("no-reconnect");
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// Complete the channel
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channel.ToMicroservice.Writer.Complete();
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// Cannot "reconnect" - must create new channel
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var canWrite = channel.ToMicroservice.Writer.TryWrite(new Frame
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{
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Type = FrameType.Request,
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CorrelationId = "test",
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Payload = Array.Empty<byte>()
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});
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canWrite.Should().BeFalse();
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}
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[Fact]
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public async Task InMemoryChannel_CompletedWithError_PropagatesError()
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{
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using var channel = new InMemoryChannel("error-complete");
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var expectedException = new InvalidOperationException("Simulated failure");
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// Complete with error
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channel.ToMicroservice.Writer.Complete(expectedException);
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// Reading should fail with the error
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try
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{
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await channel.ToMicroservice.Reader.ReadAsync();
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Assert.Fail("Should have thrown");
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}
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catch (InvalidOperationException ex)
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{
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ex.Message.Should().Be("Simulated failure");
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||||
}
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||||
catch (ChannelClosedException)
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{
|
||||
// Also acceptable
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||||
}
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||||
}
|
||||
}
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||||
@@ -0,0 +1,515 @@
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||||
using System.Buffers.Binary;
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||||
using System.Text;
|
||||
using StellaOps.Router.Common.Enums;
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||||
using StellaOps.Router.Common.Models;
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||||
|
||||
namespace StellaOps.Router.Transport.Tcp.Tests;
|
||||
|
||||
/// <summary>
|
||||
/// Fuzz tests for invalid message formats: malformed frames → graceful error handling.
|
||||
/// Tests protocol resilience against corrupted, truncated, and invalid data.
|
||||
/// </summary>
|
||||
public sealed class FrameFuzzTests
|
||||
{
|
||||
#region Truncated Frame Tests
|
||||
|
||||
[Fact]
|
||||
public async Task Fuzz_EmptyStream_ReturnsNull()
|
||||
{
|
||||
// Arrange
|
||||
using var stream = new MemoryStream();
|
||||
|
||||
// Act
|
||||
var result = await FrameProtocol.ReadFrameAsync(stream, 16 * 1024 * 1024, CancellationToken.None);
|
||||
|
||||
// Assert
|
||||
result.Should().BeNull();
|
||||
}
|
||||
|
||||
[Theory]
|
||||
[InlineData(1)]
|
||||
[InlineData(2)]
|
||||
[InlineData(3)]
|
||||
public async Task Fuzz_PartialLengthPrefix_ThrowsException(int partialBytes)
|
||||
{
|
||||
// Arrange - Length prefix is 4 bytes, provide less
|
||||
using var stream = new MemoryStream(new byte[partialBytes]);
|
||||
|
||||
// Act & Assert
|
||||
var action = () => FrameProtocol.ReadFrameAsync(stream, 16 * 1024 * 1024, CancellationToken.None);
|
||||
await action.Should().ThrowAsync<InvalidOperationException>()
|
||||
.WithMessage("*Incomplete length prefix*");
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public async Task Fuzz_LengthPrefixOnly_ThrowsException()
|
||||
{
|
||||
// Arrange - Valid length prefix but no payload
|
||||
using var stream = new MemoryStream();
|
||||
var lengthBuffer = new byte[4];
|
||||
BinaryPrimitives.WriteInt32BigEndian(lengthBuffer, 100);
|
||||
stream.Write(lengthBuffer);
|
||||
stream.Position = 0;
|
||||
|
||||
// Act & Assert
|
||||
var action = () => FrameProtocol.ReadFrameAsync(stream, 16 * 1024 * 1024, CancellationToken.None);
|
||||
await action.Should().ThrowAsync<InvalidOperationException>()
|
||||
.WithMessage("*Incomplete payload*");
|
||||
}
|
||||
|
||||
[Theory]
|
||||
[InlineData(50, 10)]
|
||||
[InlineData(100, 25)]
|
||||
[InlineData(1000, 100)]
|
||||
public async Task Fuzz_PartialPayload_ThrowsException(int claimedLength, int actualLength)
|
||||
{
|
||||
// Arrange - Claim to have more bytes than provided
|
||||
using var stream = new MemoryStream();
|
||||
var lengthBuffer = new byte[4];
|
||||
BinaryPrimitives.WriteInt32BigEndian(lengthBuffer, claimedLength);
|
||||
stream.Write(lengthBuffer);
|
||||
stream.Write(new byte[actualLength]);
|
||||
stream.Position = 0;
|
||||
|
||||
// Act & Assert
|
||||
var action = () => FrameProtocol.ReadFrameAsync(stream, 16 * 1024 * 1024, CancellationToken.None);
|
||||
await action.Should().ThrowAsync<InvalidOperationException>()
|
||||
.WithMessage("*Incomplete payload*");
|
||||
}
|
||||
|
||||
#endregion
|
||||
|
||||
#region Invalid Length Tests
|
||||
|
||||
[Fact]
|
||||
public async Task Fuzz_NegativeLength_ThrowsException()
|
||||
{
|
||||
// Arrange - Negative length (high bit set in signed int)
|
||||
using var stream = new MemoryStream();
|
||||
var lengthBuffer = new byte[4];
|
||||
BinaryPrimitives.WriteInt32BigEndian(lengthBuffer, -1);
|
||||
stream.Write(lengthBuffer);
|
||||
stream.Position = 0;
|
||||
|
||||
// Act & Assert
|
||||
var action = () => FrameProtocol.ReadFrameAsync(stream, 16 * 1024 * 1024, CancellationToken.None);
|
||||
await action.Should().ThrowAsync<InvalidOperationException>();
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public async Task Fuzz_ZeroLength_ThrowsException()
|
||||
{
|
||||
// Arrange
|
||||
using var stream = new MemoryStream();
|
||||
var lengthBuffer = new byte[4];
|
||||
BinaryPrimitives.WriteInt32BigEndian(lengthBuffer, 0);
|
||||
stream.Write(lengthBuffer);
|
||||
stream.Position = 0;
|
||||
|
||||
// Act & Assert
|
||||
var action = () => FrameProtocol.ReadFrameAsync(stream, 16 * 1024 * 1024, CancellationToken.None);
|
||||
await action.Should().ThrowAsync<InvalidOperationException>()
|
||||
.WithMessage("*Invalid payload length*");
|
||||
}
|
||||
|
||||
[Theory]
|
||||
[InlineData(1)]
|
||||
[InlineData(5)]
|
||||
[InlineData(16)]
|
||||
public async Task Fuzz_TooSmallLength_ThrowsException(int tooSmall)
|
||||
{
|
||||
// Arrange - Length less than minimum header size (17 = type + correlation)
|
||||
using var stream = new MemoryStream();
|
||||
var lengthBuffer = new byte[4];
|
||||
BinaryPrimitives.WriteInt32BigEndian(lengthBuffer, tooSmall);
|
||||
stream.Write(lengthBuffer);
|
||||
stream.Write(new byte[tooSmall]);
|
||||
stream.Position = 0;
|
||||
|
||||
// Act & Assert
|
||||
var action = () => FrameProtocol.ReadFrameAsync(stream, 16 * 1024 * 1024, CancellationToken.None);
|
||||
await action.Should().ThrowAsync<InvalidOperationException>()
|
||||
.WithMessage("*Invalid payload length*");
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public async Task Fuzz_OversizedLength_ThrowsException()
|
||||
{
|
||||
// Arrange - Frame larger than max allowed
|
||||
using var stream = new MemoryStream();
|
||||
var validFrame = new Frame
|
||||
{
|
||||
Type = FrameType.Request,
|
||||
CorrelationId = "oversized",
|
||||
Payload = new byte[1000]
|
||||
};
|
||||
await FrameProtocol.WriteFrameAsync(stream, validFrame, CancellationToken.None);
|
||||
stream.Position = 0;
|
||||
|
||||
// Act & Assert - Max is smaller than frame
|
||||
var action = () => FrameProtocol.ReadFrameAsync(stream, 100, CancellationToken.None);
|
||||
await action.Should().ThrowAsync<InvalidOperationException>()
|
||||
.WithMessage("*exceeds maximum*");
|
||||
}
|
||||
|
||||
#endregion
|
||||
|
||||
#region Invalid Frame Type Tests
|
||||
|
||||
[Theory]
|
||||
[InlineData(255)]
|
||||
[InlineData(100)]
|
||||
[InlineData(50)]
|
||||
public async Task Fuzz_InvalidFrameType_HandledGracefully(byte invalidType)
|
||||
{
|
||||
// Arrange - Valid length, valid correlation, but invalid frame type
|
||||
using var stream = new MemoryStream();
|
||||
var correlationId = Guid.NewGuid().ToString("N");
|
||||
var payload = Encoding.UTF8.GetBytes(correlationId);
|
||||
|
||||
var totalLength = 1 + 16 + 0; // type + correlationId + no payload
|
||||
var lengthBuffer = new byte[4];
|
||||
BinaryPrimitives.WriteInt32BigEndian(lengthBuffer, totalLength);
|
||||
|
||||
stream.Write(lengthBuffer);
|
||||
stream.WriteByte(invalidType); // Invalid frame type
|
||||
stream.Write(Guid.NewGuid().ToByteArray()); // 16-byte correlation ID
|
||||
stream.Position = 0;
|
||||
|
||||
// Act
|
||||
var result = await FrameProtocol.ReadFrameAsync(stream, 16 * 1024 * 1024, CancellationToken.None);
|
||||
|
||||
// Assert - Should read frame (invalid type is cast but not validated at protocol level)
|
||||
result.Should().NotBeNull();
|
||||
}
|
||||
|
||||
#endregion
|
||||
|
||||
#region Corrupted Correlation ID Tests
|
||||
|
||||
[Fact]
|
||||
public async Task Fuzz_AllZeroCorrelationId_ReadSuccessfully()
|
||||
{
|
||||
// Arrange
|
||||
using var stream = new MemoryStream();
|
||||
var totalLength = 1 + 16 + 5; // type + correlationId + payload
|
||||
var lengthBuffer = new byte[4];
|
||||
BinaryPrimitives.WriteInt32BigEndian(lengthBuffer, totalLength);
|
||||
|
||||
stream.Write(lengthBuffer);
|
||||
stream.WriteByte((byte)FrameType.Request);
|
||||
stream.Write(new byte[16]); // All-zero correlation ID
|
||||
stream.Write("hello"u8);
|
||||
stream.Position = 0;
|
||||
|
||||
// Act
|
||||
var result = await FrameProtocol.ReadFrameAsync(stream, 16 * 1024 * 1024, CancellationToken.None);
|
||||
|
||||
// Assert
|
||||
result.Should().NotBeNull();
|
||||
result!.CorrelationId.Should().Be("00000000000000000000000000000000");
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public async Task Fuzz_NonGuidCorrelationBytes_ReadAsHex()
|
||||
{
|
||||
// Arrange - Non-standard bytes that aren't a valid GUID
|
||||
using var stream = new MemoryStream();
|
||||
var totalLength = 1 + 16 + 5;
|
||||
var lengthBuffer = new byte[4];
|
||||
BinaryPrimitives.WriteInt32BigEndian(lengthBuffer, totalLength);
|
||||
|
||||
stream.Write(lengthBuffer);
|
||||
stream.WriteByte((byte)FrameType.Request);
|
||||
// Write 16 bytes that spell "FUZZ_TEST_ID_XYZ" (16 chars)
|
||||
stream.Write("FUZZ_TEST_ID_XYZ"u8);
|
||||
stream.Write("hello"u8);
|
||||
stream.Position = 0;
|
||||
|
||||
// Act
|
||||
var result = await FrameProtocol.ReadFrameAsync(stream, 16 * 1024 * 1024, CancellationToken.None);
|
||||
|
||||
// Assert
|
||||
result.Should().NotBeNull();
|
||||
result!.CorrelationId.Should().NotBeNull();
|
||||
}
|
||||
|
||||
#endregion
|
||||
|
||||
#region Random Data Tests
|
||||
|
||||
[Fact]
|
||||
public async Task Fuzz_RandomBytes_HandledGracefully()
|
||||
{
|
||||
// Arrange
|
||||
var random = new Random(42);
|
||||
var randomData = new byte[100];
|
||||
random.NextBytes(randomData);
|
||||
using var stream = new MemoryStream(randomData);
|
||||
|
||||
// Act & Assert - Should throw or return null, not crash
|
||||
try
|
||||
{
|
||||
var result = await FrameProtocol.ReadFrameAsync(stream, 16 * 1024 * 1024, CancellationToken.None);
|
||||
// If it returns, it's either null or a frame
|
||||
(result == null || result.Type >= 0).Should().BeTrue();
|
||||
}
|
||||
catch (InvalidOperationException)
|
||||
{
|
||||
// Expected for malformed data
|
||||
}
|
||||
}
|
||||
|
||||
[Theory]
|
||||
[InlineData(10)]
|
||||
[InlineData(50)]
|
||||
[InlineData(100)]
|
||||
public async Task Fuzz_RandomBytesVariousSizes_NoUnhandledExceptions(int size)
|
||||
{
|
||||
// Arrange
|
||||
var random = new Random(size); // Deterministic seed based on size
|
||||
var randomData = new byte[size];
|
||||
random.NextBytes(randomData);
|
||||
using var stream = new MemoryStream(randomData);
|
||||
|
||||
// Act & Assert - Should not throw unhandled exceptions
|
||||
var action = async () =>
|
||||
{
|
||||
try
|
||||
{
|
||||
await FrameProtocol.ReadFrameAsync(stream, 16 * 1024 * 1024, CancellationToken.None);
|
||||
}
|
||||
catch (InvalidOperationException)
|
||||
{
|
||||
// Expected
|
||||
}
|
||||
};
|
||||
|
||||
await action.Should().NotThrowAsync<NullReferenceException>();
|
||||
await action.Should().NotThrowAsync<ArgumentOutOfRangeException>();
|
||||
await action.Should().NotThrowAsync<IndexOutOfRangeException>();
|
||||
}
|
||||
|
||||
#endregion
|
||||
|
||||
#region Boundary Tests
|
||||
|
||||
[Fact]
|
||||
public async Task Fuzz_ExactMinimumValidFrame_ParsesSuccessfully()
|
||||
{
|
||||
// Arrange - Minimum valid frame: type (1) + correlation (16) + 0 payload = 17 bytes
|
||||
using var stream = new MemoryStream();
|
||||
var totalLength = 17;
|
||||
var lengthBuffer = new byte[4];
|
||||
BinaryPrimitives.WriteInt32BigEndian(lengthBuffer, totalLength);
|
||||
|
||||
stream.Write(lengthBuffer);
|
||||
stream.WriteByte((byte)FrameType.Cancel);
|
||||
stream.Write(Guid.NewGuid().ToByteArray());
|
||||
stream.Position = 0;
|
||||
|
||||
// Act
|
||||
var result = await FrameProtocol.ReadFrameAsync(stream, 16 * 1024 * 1024, CancellationToken.None);
|
||||
|
||||
// Assert
|
||||
result.Should().NotBeNull();
|
||||
result!.Type.Should().Be(FrameType.Cancel);
|
||||
result.Payload.Length.Should().Be(0);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public async Task Fuzz_MaxIntLength_RejectedByMaxFrameSize()
|
||||
{
|
||||
// Arrange - Length = Int32.MaxValue
|
||||
using var stream = new MemoryStream();
|
||||
var lengthBuffer = new byte[4];
|
||||
BinaryPrimitives.WriteInt32BigEndian(lengthBuffer, int.MaxValue);
|
||||
stream.Write(lengthBuffer);
|
||||
stream.Position = 0;
|
||||
|
||||
// Act & Assert
|
||||
var action = () => FrameProtocol.ReadFrameAsync(stream, 16 * 1024 * 1024, CancellationToken.None);
|
||||
await action.Should().ThrowAsync<InvalidOperationException>()
|
||||
.WithMessage("*exceeds maximum*");
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public async Task Fuzz_ExactMaxFrameSize_Accepted()
|
||||
{
|
||||
// Arrange
|
||||
using var stream = new MemoryStream();
|
||||
const int maxFrameSize = 1000;
|
||||
var payloadSize = maxFrameSize - 17; // Reserve 17 bytes for header
|
||||
|
||||
var frame = new Frame
|
||||
{
|
||||
Type = FrameType.Request,
|
||||
CorrelationId = Guid.NewGuid().ToString("N"),
|
||||
Payload = new byte[payloadSize]
|
||||
};
|
||||
|
||||
await FrameProtocol.WriteFrameAsync(stream, frame, CancellationToken.None);
|
||||
stream.Position = 0;
|
||||
|
||||
// Act
|
||||
var result = await FrameProtocol.ReadFrameAsync(stream, maxFrameSize, CancellationToken.None);
|
||||
|
||||
// Assert
|
||||
result.Should().NotBeNull();
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public async Task Fuzz_OneBytOverMaxFrameSize_Rejected()
|
||||
{
|
||||
// Arrange
|
||||
using var stream = new MemoryStream();
|
||||
const int maxFrameSize = 1000;
|
||||
var payloadSize = maxFrameSize - 17 + 1; // One byte over
|
||||
|
||||
var frame = new Frame
|
||||
{
|
||||
Type = FrameType.Request,
|
||||
CorrelationId = Guid.NewGuid().ToString("N"),
|
||||
Payload = new byte[payloadSize]
|
||||
};
|
||||
|
||||
await FrameProtocol.WriteFrameAsync(stream, frame, CancellationToken.None);
|
||||
stream.Position = 0;
|
||||
|
||||
// Act & Assert
|
||||
var action = () => FrameProtocol.ReadFrameAsync(stream, maxFrameSize, CancellationToken.None);
|
||||
await action.Should().ThrowAsync<InvalidOperationException>()
|
||||
.WithMessage("*exceeds maximum*");
|
||||
}
|
||||
|
||||
#endregion
|
||||
|
||||
#region Multiple Frames Tests
|
||||
|
||||
[Fact]
|
||||
public async Task Fuzz_GarbageBetweenFrames_CorruptsSubsequent()
|
||||
{
|
||||
// Arrange - Valid frame, then garbage, then valid frame
|
||||
using var stream = new MemoryStream();
|
||||
|
||||
// Write first valid frame
|
||||
var frame1 = new Frame
|
||||
{
|
||||
Type = FrameType.Request,
|
||||
CorrelationId = "first",
|
||||
Payload = "data1"u8.ToArray()
|
||||
};
|
||||
await FrameProtocol.WriteFrameAsync(stream, frame1, CancellationToken.None);
|
||||
|
||||
// Write garbage
|
||||
stream.Write(new byte[] { 0xFF, 0xFF, 0xFF, 0xFF });
|
||||
|
||||
// Write second valid frame (will be misaligned)
|
||||
var frame2 = new Frame
|
||||
{
|
||||
Type = FrameType.Response,
|
||||
CorrelationId = "second",
|
||||
Payload = "data2"u8.ToArray()
|
||||
};
|
||||
await FrameProtocol.WriteFrameAsync(stream, frame2, CancellationToken.None);
|
||||
|
||||
stream.Position = 0;
|
||||
|
||||
// Act - Read first frame successfully
|
||||
var result1 = await FrameProtocol.ReadFrameAsync(stream, 16 * 1024 * 1024, CancellationToken.None);
|
||||
result1.Should().NotBeNull();
|
||||
|
||||
// Second read will hit garbage as length prefix
|
||||
var action = () => FrameProtocol.ReadFrameAsync(stream, 16 * 1024 * 1024, CancellationToken.None);
|
||||
await action.Should().ThrowAsync<InvalidOperationException>();
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public async Task Fuzz_MultipleValidFrames_AllParsed()
|
||||
{
|
||||
// Arrange
|
||||
using var stream = new MemoryStream();
|
||||
const int frameCount = 10;
|
||||
|
||||
for (int i = 0; i < frameCount; i++)
|
||||
{
|
||||
var frame = new Frame
|
||||
{
|
||||
Type = FrameType.Request,
|
||||
CorrelationId = $"frame-{i}",
|
||||
Payload = BitConverter.GetBytes(i)
|
||||
};
|
||||
await FrameProtocol.WriteFrameAsync(stream, frame, CancellationToken.None);
|
||||
}
|
||||
|
||||
stream.Position = 0;
|
||||
|
||||
// Act
|
||||
var results = new List<Frame>();
|
||||
for (int i = 0; i < frameCount; i++)
|
||||
{
|
||||
var result = await FrameProtocol.ReadFrameAsync(stream, 16 * 1024 * 1024, CancellationToken.None);
|
||||
if (result != null)
|
||||
{
|
||||
results.Add(result);
|
||||
}
|
||||
}
|
||||
|
||||
// Assert
|
||||
results.Should().HaveCount(frameCount);
|
||||
}
|
||||
|
||||
#endregion
|
||||
|
||||
#region Payload Content Tests
|
||||
|
||||
[Fact]
|
||||
public async Task Fuzz_AllByteValues_InPayload_Preserved()
|
||||
{
|
||||
// Arrange - All possible byte values (0-255)
|
||||
using var stream = new MemoryStream();
|
||||
var allBytes = Enumerable.Range(0, 256).Select(i => (byte)i).ToArray();
|
||||
|
||||
var frame = new Frame
|
||||
{
|
||||
Type = FrameType.Request,
|
||||
CorrelationId = "all-bytes",
|
||||
Payload = allBytes
|
||||
};
|
||||
|
||||
await FrameProtocol.WriteFrameAsync(stream, frame, CancellationToken.None);
|
||||
stream.Position = 0;
|
||||
|
||||
// Act
|
||||
var result = await FrameProtocol.ReadFrameAsync(stream, 16 * 1024 * 1024, CancellationToken.None);
|
||||
|
||||
// Assert
|
||||
result!.Payload.ToArray().Should().BeEquivalentTo(allBytes);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public async Task Fuzz_NullBytes_InPayload_Preserved()
|
||||
{
|
||||
// Arrange - Payload with null bytes
|
||||
using var stream = new MemoryStream();
|
||||
var payloadWithNulls = new byte[] { 0x00, 0x00, 0x01, 0x00, 0x02, 0x00, 0x00 };
|
||||
|
||||
var frame = new Frame
|
||||
{
|
||||
Type = FrameType.Request,
|
||||
CorrelationId = "null-bytes",
|
||||
Payload = payloadWithNulls
|
||||
};
|
||||
|
||||
await FrameProtocol.WriteFrameAsync(stream, frame, CancellationToken.None);
|
||||
stream.Position = 0;
|
||||
|
||||
// Act
|
||||
var result = await FrameProtocol.ReadFrameAsync(stream, 16 * 1024 * 1024, CancellationToken.None);
|
||||
|
||||
// Assert
|
||||
result!.Payload.ToArray().Should().BeEquivalentTo(payloadWithNulls);
|
||||
}
|
||||
|
||||
#endregion
|
||||
}
|
||||
@@ -0,0 +1,532 @@
|
||||
using System.Text;
|
||||
using StellaOps.Router.Common.Enums;
|
||||
using StellaOps.Router.Common.Frames;
|
||||
using StellaOps.Router.Common.Models;
|
||||
|
||||
namespace StellaOps.Router.Transport.Tcp.Tests;
|
||||
|
||||
/// <summary>
|
||||
/// Transport compliance tests for TCP transport.
|
||||
/// Tests: protocol roundtrip, framing integrity, message ordering, and connection handling.
|
||||
/// </summary>
|
||||
public sealed class TcpTransportComplianceTests
|
||||
{
|
||||
#region Protocol Roundtrip Tests
|
||||
|
||||
[Fact]
|
||||
public async Task ProtocolRoundtrip_RequestFrame_AllFieldsPreserved()
|
||||
{
|
||||
// Arrange
|
||||
using var stream = new MemoryStream();
|
||||
|
||||
var request = new RequestFrame
|
||||
{
|
||||
RequestId = "req-tcp-12345",
|
||||
CorrelationId = "corr-tcp-67890",
|
||||
Method = "POST",
|
||||
Path = "/api/tcp-test",
|
||||
Headers = new Dictionary<string, string>
|
||||
{
|
||||
["Content-Type"] = "application/json",
|
||||
["X-Custom"] = "value"
|
||||
},
|
||||
Payload = Encoding.UTF8.GetBytes(@"{""data"":""tcp-test""}"),
|
||||
TimeoutSeconds = 120,
|
||||
SupportsStreaming = true
|
||||
};
|
||||
|
||||
var requestFrame = FrameConverter.ToFrame(request);
|
||||
|
||||
// Act - Write through protocol
|
||||
await FrameProtocol.WriteFrameAsync(stream, requestFrame, CancellationToken.None);
|
||||
|
||||
// Read back
|
||||
stream.Position = 0;
|
||||
var readFrame = await FrameProtocol.ReadFrameAsync(stream, 16 * 1024 * 1024, CancellationToken.None);
|
||||
var restored = FrameConverter.ToRequestFrame(readFrame!);
|
||||
|
||||
// Assert - All fields preserved
|
||||
restored.Should().NotBeNull();
|
||||
restored!.RequestId.Should().Be(request.RequestId);
|
||||
restored.CorrelationId.Should().Be(request.CorrelationId);
|
||||
restored.Method.Should().Be(request.Method);
|
||||
restored.Path.Should().Be(request.Path);
|
||||
restored.Headers.Should().BeEquivalentTo(request.Headers);
|
||||
restored.Payload.ToArray().Should().BeEquivalentTo(request.Payload);
|
||||
restored.TimeoutSeconds.Should().Be(request.TimeoutSeconds);
|
||||
restored.SupportsStreaming.Should().Be(request.SupportsStreaming);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public async Task ProtocolRoundtrip_ResponseFrame_AllFieldsPreserved()
|
||||
{
|
||||
// Arrange
|
||||
using var stream = new MemoryStream();
|
||||
|
||||
var response = new ResponseFrame
|
||||
{
|
||||
RequestId = "req-tcp-response",
|
||||
StatusCode = 201,
|
||||
Headers = new Dictionary<string, string>
|
||||
{
|
||||
["Content-Type"] = "application/json",
|
||||
["Location"] = "/api/resource/456"
|
||||
},
|
||||
Payload = Encoding.UTF8.GetBytes(@"{""id"":456}"),
|
||||
HasMoreChunks = false
|
||||
};
|
||||
|
||||
var responseFrame = FrameConverter.ToFrame(response);
|
||||
|
||||
// Act
|
||||
await FrameProtocol.WriteFrameAsync(stream, responseFrame, CancellationToken.None);
|
||||
stream.Position = 0;
|
||||
var readFrame = await FrameProtocol.ReadFrameAsync(stream, 16 * 1024 * 1024, CancellationToken.None);
|
||||
var restored = FrameConverter.ToResponseFrame(readFrame!);
|
||||
|
||||
// Assert
|
||||
restored.Should().NotBeNull();
|
||||
restored!.RequestId.Should().Be(response.RequestId);
|
||||
restored.StatusCode.Should().Be(response.StatusCode);
|
||||
restored.Headers.Should().BeEquivalentTo(response.Headers);
|
||||
restored.Payload.ToArray().Should().BeEquivalentTo(response.Payload);
|
||||
restored.HasMoreChunks.Should().Be(response.HasMoreChunks);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public async Task ProtocolRoundtrip_BinaryPayload_PreservesAllBytes()
|
||||
{
|
||||
// Arrange
|
||||
using var stream = new MemoryStream();
|
||||
|
||||
// Binary payload with all byte values
|
||||
var binaryPayload = Enumerable.Range(0, 256).Select(i => (byte)i).ToArray();
|
||||
|
||||
var frame = new Frame
|
||||
{
|
||||
Type = FrameType.Request,
|
||||
CorrelationId = "binary-tcp",
|
||||
Payload = binaryPayload
|
||||
};
|
||||
|
||||
// Act
|
||||
await FrameProtocol.WriteFrameAsync(stream, frame, CancellationToken.None);
|
||||
stream.Position = 0;
|
||||
var readFrame = await FrameProtocol.ReadFrameAsync(stream, 16 * 1024 * 1024, CancellationToken.None);
|
||||
|
||||
// Assert
|
||||
readFrame!.Payload.ToArray().Should().BeEquivalentTo(binaryPayload);
|
||||
}
|
||||
|
||||
[Theory]
|
||||
[InlineData(0)]
|
||||
[InlineData(1)]
|
||||
[InlineData(100)]
|
||||
[InlineData(1000)]
|
||||
[InlineData(10000)]
|
||||
[InlineData(64 * 1024)]
|
||||
public async Task ProtocolRoundtrip_VariousPayloadSizes_AllSucceed(int payloadSize)
|
||||
{
|
||||
// Arrange
|
||||
using var stream = new MemoryStream();
|
||||
|
||||
var payload = new byte[payloadSize];
|
||||
if (payloadSize > 0)
|
||||
{
|
||||
new Random(payloadSize).NextBytes(payload);
|
||||
}
|
||||
|
||||
var frame = new Frame
|
||||
{
|
||||
Type = FrameType.Request,
|
||||
CorrelationId = $"size-{payloadSize}",
|
||||
Payload = payload
|
||||
};
|
||||
|
||||
// Act
|
||||
await FrameProtocol.WriteFrameAsync(stream, frame, CancellationToken.None);
|
||||
stream.Position = 0;
|
||||
var readFrame = await FrameProtocol.ReadFrameAsync(stream, 16 * 1024 * 1024, CancellationToken.None);
|
||||
|
||||
// Assert
|
||||
readFrame!.Payload.Length.Should().Be(payloadSize);
|
||||
readFrame.Payload.ToArray().Should().BeEquivalentTo(payload);
|
||||
}
|
||||
|
||||
#endregion
|
||||
|
||||
#region Frame Type Discrimination Tests
|
||||
|
||||
[Theory]
|
||||
[InlineData(FrameType.Request)]
|
||||
[InlineData(FrameType.Response)]
|
||||
[InlineData(FrameType.Hello)]
|
||||
[InlineData(FrameType.Heartbeat)]
|
||||
[InlineData(FrameType.Cancel)]
|
||||
public async Task ProtocolRoundtrip_AllFrameTypes_TypePreserved(FrameType frameType)
|
||||
{
|
||||
// Arrange
|
||||
using var stream = new MemoryStream();
|
||||
|
||||
var frame = new Frame
|
||||
{
|
||||
Type = frameType,
|
||||
CorrelationId = $"type-{frameType}",
|
||||
Payload = new byte[] { 1, 2, 3 }
|
||||
};
|
||||
|
||||
// Act
|
||||
await FrameProtocol.WriteFrameAsync(stream, frame, CancellationToken.None);
|
||||
stream.Position = 0;
|
||||
var readFrame = await FrameProtocol.ReadFrameAsync(stream, 16 * 1024 * 1024, CancellationToken.None);
|
||||
|
||||
// Assert
|
||||
readFrame!.Type.Should().Be(frameType);
|
||||
}
|
||||
|
||||
#endregion
|
||||
|
||||
#region Message Ordering Tests
|
||||
|
||||
[Fact]
|
||||
public async Task Ordering_MultipleFrames_FifoPreserved()
|
||||
{
|
||||
// Arrange
|
||||
using var stream = new MemoryStream();
|
||||
const int frameCount = 100;
|
||||
|
||||
var frames = Enumerable.Range(1, frameCount)
|
||||
.Select(i => new Frame
|
||||
{
|
||||
Type = FrameType.Request,
|
||||
CorrelationId = $"order-{i:D5}",
|
||||
Payload = BitConverter.GetBytes(i)
|
||||
})
|
||||
.ToList();
|
||||
|
||||
// Act - Write all
|
||||
foreach (var frame in frames)
|
||||
{
|
||||
await FrameProtocol.WriteFrameAsync(stream, frame, CancellationToken.None);
|
||||
}
|
||||
|
||||
// Read all
|
||||
stream.Position = 0;
|
||||
var receivedIds = new List<string>();
|
||||
for (int i = 0; i < frameCount; i++)
|
||||
{
|
||||
var frame = await FrameProtocol.ReadFrameAsync(stream, 16 * 1024 * 1024, CancellationToken.None);
|
||||
receivedIds.Add(frame!.CorrelationId!);
|
||||
}
|
||||
|
||||
// Assert - Order preserved
|
||||
for (int i = 0; i < frameCount; i++)
|
||||
{
|
||||
receivedIds[i].Should().Be($"order-{i + 1:D5}");
|
||||
}
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public async Task Ordering_MixedFrameTypes_OrderPreserved()
|
||||
{
|
||||
// Arrange
|
||||
using var stream = new MemoryStream();
|
||||
|
||||
var frames = new[]
|
||||
{
|
||||
new Frame { Type = FrameType.Hello, CorrelationId = "1", Payload = Array.Empty<byte>() },
|
||||
new Frame { Type = FrameType.Request, CorrelationId = "2", Payload = new byte[] { 1 } },
|
||||
new Frame { Type = FrameType.Response, CorrelationId = "3", Payload = new byte[] { 2 } },
|
||||
new Frame { Type = FrameType.Heartbeat, CorrelationId = "4", Payload = Array.Empty<byte>() },
|
||||
new Frame { Type = FrameType.Cancel, CorrelationId = "5", Payload = Array.Empty<byte>() }
|
||||
};
|
||||
|
||||
// Act - Write all
|
||||
foreach (var frame in frames)
|
||||
{
|
||||
await FrameProtocol.WriteFrameAsync(stream, frame, CancellationToken.None);
|
||||
}
|
||||
|
||||
// Read all
|
||||
stream.Position = 0;
|
||||
var received = new List<(FrameType Type, string CorrelationId)>();
|
||||
for (int i = 0; i < frames.Length; i++)
|
||||
{
|
||||
var frame = await FrameProtocol.ReadFrameAsync(stream, 16 * 1024 * 1024, CancellationToken.None);
|
||||
received.Add((frame!.Type, frame.CorrelationId!));
|
||||
}
|
||||
|
||||
// Assert - Order and types preserved
|
||||
received.Should().BeEquivalentTo(
|
||||
frames.Select(f => (f.Type, f.CorrelationId!)),
|
||||
options => options.WithStrictOrdering());
|
||||
}
|
||||
|
||||
#endregion
|
||||
|
||||
#region Framing Integrity Tests
|
||||
|
||||
[Fact]
|
||||
public async Task FramingIntegrity_CorrelationIdPreserved()
|
||||
{
|
||||
// Arrange
|
||||
using var stream = new MemoryStream();
|
||||
var correlationIds = new[]
|
||||
{
|
||||
"simple-id",
|
||||
"guid-" + Guid.NewGuid().ToString("N"),
|
||||
"with-dashes-123-456",
|
||||
"unicode-日本語"
|
||||
};
|
||||
|
||||
foreach (var correlationId in correlationIds)
|
||||
{
|
||||
stream.SetLength(0);
|
||||
|
||||
var frame = new Frame
|
||||
{
|
||||
Type = FrameType.Request,
|
||||
CorrelationId = correlationId,
|
||||
Payload = Array.Empty<byte>()
|
||||
};
|
||||
|
||||
// Act
|
||||
await FrameProtocol.WriteFrameAsync(stream, frame, CancellationToken.None);
|
||||
stream.Position = 0;
|
||||
var readFrame = await FrameProtocol.ReadFrameAsync(stream, 16 * 1024 * 1024, CancellationToken.None);
|
||||
|
||||
// Assert
|
||||
readFrame!.CorrelationId.Should().NotBeNull();
|
||||
}
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public async Task FramingIntegrity_LargeFrame_TransfersCompletely()
|
||||
{
|
||||
// Arrange - 1MB frame
|
||||
using var stream = new MemoryStream();
|
||||
var largePayload = new byte[1024 * 1024];
|
||||
new Random(42).NextBytes(largePayload);
|
||||
|
||||
var frame = new Frame
|
||||
{
|
||||
Type = FrameType.Request,
|
||||
CorrelationId = "large-frame",
|
||||
Payload = largePayload
|
||||
};
|
||||
|
||||
// Act
|
||||
await FrameProtocol.WriteFrameAsync(stream, frame, CancellationToken.None);
|
||||
stream.Position = 0;
|
||||
var readFrame = await FrameProtocol.ReadFrameAsync(stream, 2 * 1024 * 1024, CancellationToken.None);
|
||||
|
||||
// Assert
|
||||
readFrame!.Payload.ToArray().Should().BeEquivalentTo(largePayload);
|
||||
}
|
||||
|
||||
#endregion
|
||||
|
||||
#region Connection Behavior Tests
|
||||
|
||||
[Fact]
|
||||
public async Task ConnectionBehavior_PendingRequestTracker_TracksCorrectly()
|
||||
{
|
||||
// Arrange
|
||||
using var tracker = new PendingRequestTracker();
|
||||
var correlationId = Guid.NewGuid();
|
||||
|
||||
// Act - Track request
|
||||
var responseTask = tracker.TrackRequest(correlationId, CancellationToken.None);
|
||||
tracker.Count.Should().Be(1);
|
||||
|
||||
// Complete request
|
||||
var response = new Frame
|
||||
{
|
||||
Type = FrameType.Response,
|
||||
CorrelationId = correlationId.ToString("N"),
|
||||
Payload = new byte[] { 1, 2, 3 }
|
||||
};
|
||||
tracker.CompleteRequest(correlationId, response);
|
||||
|
||||
// Assert
|
||||
var result = await responseTask;
|
||||
result.Type.Should().Be(FrameType.Response);
|
||||
tracker.Count.Should().Be(0);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public async Task ConnectionBehavior_RequestTimeout_CancelsCleanly()
|
||||
{
|
||||
// Arrange
|
||||
using var tracker = new PendingRequestTracker();
|
||||
using var cts = new CancellationTokenSource(TimeSpan.FromMilliseconds(100));
|
||||
var correlationId = Guid.NewGuid();
|
||||
|
||||
// Act
|
||||
var responseTask = tracker.TrackRequest(correlationId, cts.Token);
|
||||
|
||||
// Assert - Should be cancelled after timeout
|
||||
await Assert.ThrowsAsync<TaskCanceledException>(() => responseTask);
|
||||
tracker.Count.Should().Be(0);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void ConnectionBehavior_CancelAll_ClearsAllPending()
|
||||
{
|
||||
// Arrange
|
||||
using var tracker = new PendingRequestTracker();
|
||||
var tasks = Enumerable.Range(0, 10)
|
||||
.Select(_ => tracker.TrackRequest(Guid.NewGuid(), CancellationToken.None))
|
||||
.ToList();
|
||||
|
||||
tracker.Count.Should().Be(10);
|
||||
|
||||
// Act
|
||||
tracker.CancelAll();
|
||||
|
||||
// Assert
|
||||
tracker.Count.Should().Be(0);
|
||||
tasks.Should().AllSatisfy(t => t.IsCanceled.Should().BeTrue());
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void ConnectionBehavior_FailRequest_PropagatesToAwaiter()
|
||||
{
|
||||
// Arrange
|
||||
using var tracker = new PendingRequestTracker();
|
||||
var correlationId = Guid.NewGuid();
|
||||
var task = tracker.TrackRequest(correlationId, CancellationToken.None);
|
||||
|
||||
// Act
|
||||
tracker.FailRequest(correlationId, new InvalidOperationException("Connection lost"));
|
||||
|
||||
// Assert
|
||||
task.IsFaulted.Should().BeTrue();
|
||||
task.Exception!.InnerException.Should().BeOfType<InvalidOperationException>()
|
||||
.Which.Message.Should().Be("Connection lost");
|
||||
}
|
||||
|
||||
#endregion
|
||||
|
||||
#region Determinism Tests
|
||||
|
||||
[Fact]
|
||||
public async Task Determinism_SameInput_SameOutput()
|
||||
{
|
||||
// Run same test multiple times - should always produce same results
|
||||
for (int run = 0; run < 10; run++)
|
||||
{
|
||||
// Arrange
|
||||
using var stream = new MemoryStream();
|
||||
|
||||
var request = new RequestFrame
|
||||
{
|
||||
RequestId = "deterministic-tcp",
|
||||
Method = "GET",
|
||||
Path = "/api/test",
|
||||
Headers = new Dictionary<string, string> { ["Key"] = "Value" },
|
||||
Payload = Encoding.UTF8.GetBytes("deterministic")
|
||||
};
|
||||
|
||||
var frame = FrameConverter.ToFrame(request);
|
||||
|
||||
// Act
|
||||
await FrameProtocol.WriteFrameAsync(stream, frame, CancellationToken.None);
|
||||
stream.Position = 0;
|
||||
var readFrame = await FrameProtocol.ReadFrameAsync(stream, 16 * 1024 * 1024, CancellationToken.None);
|
||||
var restored = FrameConverter.ToRequestFrame(readFrame!);
|
||||
|
||||
// Assert - Every run should produce identical results
|
||||
restored!.RequestId.Should().Be("deterministic-tcp");
|
||||
restored.Method.Should().Be("GET");
|
||||
restored.Path.Should().Be("/api/test");
|
||||
restored.Headers["Key"].Should().Be("Value");
|
||||
Encoding.UTF8.GetString(restored.Payload.Span).Should().Be("deterministic");
|
||||
}
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public async Task Determinism_ByteSequence_Consistent()
|
||||
{
|
||||
// Arrange - Write same frame twice
|
||||
var frame = new Frame
|
||||
{
|
||||
Type = FrameType.Request,
|
||||
CorrelationId = "deterministic-bytes",
|
||||
Payload = new byte[] { 1, 2, 3, 4, 5 }
|
||||
};
|
||||
|
||||
using var stream1 = new MemoryStream();
|
||||
using var stream2 = new MemoryStream();
|
||||
|
||||
// Act
|
||||
await FrameProtocol.WriteFrameAsync(stream1, frame, CancellationToken.None);
|
||||
await FrameProtocol.WriteFrameAsync(stream2, frame, CancellationToken.None);
|
||||
|
||||
// Assert - Byte sequences should be identical
|
||||
stream1.ToArray().Should().BeEquivalentTo(stream2.ToArray());
|
||||
}
|
||||
|
||||
#endregion
|
||||
|
||||
#region Error Handling Tests
|
||||
|
||||
[Fact]
|
||||
public async Task ErrorHandling_OversizedFrame_Rejected()
|
||||
{
|
||||
// Arrange
|
||||
using var stream = new MemoryStream();
|
||||
var oversizedPayload = new byte[1024 * 1024]; // 1MB
|
||||
new Random(42).NextBytes(oversizedPayload);
|
||||
|
||||
var frame = new Frame
|
||||
{
|
||||
Type = FrameType.Request,
|
||||
CorrelationId = "oversized",
|
||||
Payload = oversizedPayload
|
||||
};
|
||||
|
||||
await FrameProtocol.WriteFrameAsync(stream, frame, CancellationToken.None);
|
||||
stream.Position = 0;
|
||||
|
||||
// Act & Assert - Reject when max is less than actual
|
||||
var action = () => FrameProtocol.ReadFrameAsync(stream, 1000, CancellationToken.None);
|
||||
await action.Should().ThrowAsync<InvalidOperationException>()
|
||||
.WithMessage("*exceeds maximum*");
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public async Task ErrorHandling_EmptyStream_ReturnsNull()
|
||||
{
|
||||
// Arrange
|
||||
using var stream = new MemoryStream();
|
||||
|
||||
// Act
|
||||
var result = await FrameProtocol.ReadFrameAsync(stream, 16 * 1024 * 1024, CancellationToken.None);
|
||||
|
||||
// Assert
|
||||
result.Should().BeNull();
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public async Task ErrorHandling_CancellationDuringWrite_Throws()
|
||||
{
|
||||
// Arrange
|
||||
using var stream = new MemoryStream();
|
||||
using var cts = new CancellationTokenSource();
|
||||
await cts.CancelAsync();
|
||||
|
||||
var frame = new Frame
|
||||
{
|
||||
Type = FrameType.Request,
|
||||
CorrelationId = "cancelled",
|
||||
Payload = new byte[100]
|
||||
};
|
||||
|
||||
// Act & Assert
|
||||
await Assert.ThrowsAsync<OperationCanceledException>(
|
||||
() => FrameProtocol.WriteFrameAsync(stream, frame, cts.Token));
|
||||
}
|
||||
|
||||
#endregion
|
||||
}
|
||||
Reference in New Issue
Block a user