Add LiNo protocol server mode (LINO API)

Foundation.Data.Doublets.Cli.Tests/Foundation.Data.Doublets.Cli.Tests.csproj

@@ -14,6 +14,8 @@
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.8.0" />
     <PackageReference Include="xunit" Version="2.5.3" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.5.3" />
+    <PackageReference Include="Microsoft.AspNetCore.TestHost" Version="8.0.8" />
+    <FrameworkReference Include="Microsoft.AspNetCore.App" />
   </ItemGroup>
 
   <ItemGroup>

Foundation.Data.Doublets.Cli.Tests/ServerModeIntegrationTests.cs

@@ -0,0 +1,129 @@
+using Xunit;
+using System.Diagnostics;
+using System.IO;
+
+namespace Foundation.Data.Doublets.Cli.Tests
+{
+    public class ServerModeIntegrationTests : IDisposable
+    {
+        private string _tempDbFile;
+
+        public ServerModeIntegrationTests()
+        {
+            _tempDbFile = Path.GetTempFileName();
+        }
+
+        public void Dispose()
+        {
+            if (File.Exists(_tempDbFile))
+            {
+                File.Delete(_tempDbFile);
+            }
+        }
+
+        [Fact]
+        public void Should_Show_Server_Option_In_Help()
+        {
+            // Arrange & Act
+            var process = new Process
+            {
+                StartInfo = new ProcessStartInfo
+                {
+                    FileName = "dotnet",
+                    Arguments = $"run --project {GetCliProjectPath()} -- --help",
+                    UseShellExecute = false,
+                    RedirectStandardOutput = true,
+                    RedirectStandardError = true
+                }
+            };
+
+            process.Start();
+            var output = process.StandardOutput.ReadToEnd();
+            process.WaitForExit();
+
+            // Assert
+            Assert.Contains("--server", output);
+            Assert.Contains("Start server listening on a port", output);
+            Assert.Contains("--port", output);
+            Assert.Contains("Port to listen on when in server mode", output);
+        }
+
+        [Fact]
+        public void Should_Start_Server_With_Correct_Output()
+        {
+            // Arrange & Act
+            var process = new Process
+            {
+                StartInfo = new ProcessStartInfo
+                {
+                    FileName = "dotnet",
+                    Arguments = $"run --project {GetCliProjectPath()} -- --server --port 0 --db {_tempDbFile}",
+                    UseShellExecute = false,
+                    RedirectStandardOutput = true,
+                    RedirectStandardError = true
+                }
+            };
+
+            process.Start();
+
+            // Wait a short time to capture startup output
+            var outputBuffer = "";
+            var startTime = DateTime.Now;
+
+            while ((DateTime.Now - startTime).TotalSeconds < 3)
+            {
+                if (!process.StandardOutput.EndOfStream)
+                {
+                    outputBuffer += process.StandardOutput.ReadLine() + "\n";
+                }
+
+                if (outputBuffer.Contains("LiNo WebSocket server started"))
+                {
+                    break;
+                }
+
+                Thread.Sleep(100);
+            }
+
+            process.Kill();
+            process.WaitForExit();
+
+            // Assert
+            Assert.Contains("LiNo WebSocket server started", outputBuffer);
+            Assert.Contains("Press Ctrl+C to stop the server", outputBuffer);
+        }
+
+        [Fact]
+        public void Should_Preserve_Normal_CLI_Functionality()
+        {
+            // Arrange & Act
+            var process = new Process
+            {
+                StartInfo = new ProcessStartInfo
+                {
+                    FileName = "dotnet",
+                    Arguments = $"run --project {GetCliProjectPath()} -- --db {_tempDbFile} '() ((1 1))' --changes --after",
+                    UseShellExecute = false,
+                    RedirectStandardOutput = true,
+                    RedirectStandardError = true
+                }
+            };
+
+            process.Start();
+            var output = process.StandardOutput.ReadToEnd();
+            process.WaitForExit();
+
+            // Assert - Normal CLI functionality should work
+            Assert.Equal(0, process.ExitCode);
+            Assert.Contains("(1: 1 1)", output); // Should show created link
+        }
+
+        private string GetCliProjectPath()
+        {
+            // Get the current test directory and navigate to the CLI project
+            var currentDir = Directory.GetCurrentDirectory();
+            var projectRoot = Directory.GetParent(currentDir)?.Parent?.Parent?.FullName;
+            return Path.Combine(projectRoot ?? currentDir, "Foundation.Data.Doublets.Cli");
+        }
+    }
+}