refactor tests and add powershell script to run tests

Author: saadati944

.config/dotnet-tools.json

@@ -0,0 +1,12 @@
+{
+  "version": 1,
+  "isRoot": true,
+  "tools": {
+    "coverlet.console": {
+      "version": "3.2.0",
+      "commands": [
+        "coverlet"
+      ]
+    }
+  }
+}

Socksy.Core.Test/Fixtures.cs

@@ -1,18 +1,16 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
+namespace Socksy.Core.Test;
 
-namespace Socksy.Core.Test
+internal static class Fixtures
 {
-    internal static class Fixtures
+    public static IPEndPoint GetLocalendpointWithTemplatePortNumber()
     {
-        private static int _lastTempPort = 54678;
+        return new IPEndPoint(IPAddress.Loopback, GetNextFreePort());
+    }
 
-        public static IPEndPoint GetLocalendpointWithTemplatePortNumber()
-        {
-            return new IPEndPoint(IPAddress.Loopback, _lastTempPort++);
-        }
+    private static int GetNextFreePort()
+    {
+        using var socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
+        socket.Bind(new IPEndPoint(IPAddress.Loopback, 0));
+        return ((IPEndPoint)socket.LocalEndPoint!).Port;
     }
 }

Socksy.Core.Test/Network/NetHelperTests.cs

@@ -4,16 +4,11 @@ namespace Socksy.Core.Test.Network;
 
 public class NetHelperTests
 {
-    private static int _lastPort = 54000;
-    private static int TempPort => _lastPort++;
-
     [Fact]
     public async void CreateTcpConnectionTo_WithValidEndpoint_EstablishesTcpConnection()
     {
         //Arrange
-        var randomPort = TempPort;
-        var localIP = IPAddress.Loopback;
-        var endpoint = new IPEndPoint(localIP, randomPort);
+        var endpoint = Fixtures.GetLocalendpointWithTemplatePortNumber();
         var listener = new TcpListener(endpoint);
 
         //Act
@@ -34,9 +29,7 @@ public async void CreateTcpConnectionTo_WithValidEndpointAndEnoughTimeout_Establ
     {
         //Arrange
         var timeout = 2000;
-        var randomPort = TempPort;
-        var localIP = IPAddress.Loopback;
-        var endpoint = new IPEndPoint(localIP, randomPort);
+        var endpoint = Fixtures.GetLocalendpointWithTemplatePortNumber();
         var listener = new TcpListener(endpoint);
 
         //Act

Socksy.Core/Network/TcpServer.cs

@@ -33,9 +33,9 @@ public void Start()
 
     public void Stop()
     {
-        _cancellationTokenSource!.Cancel();
         _listener.Stop();
         _isListening = false;
+        _cancellationTokenSource?.Cancel();
     }
 
     private async Task MainLoop()

global.json

@@ -0,0 +1,5 @@
+{
+  "sdk": {
+    "version": "7.0.100"
+  }
+}

test.ps1

@@ -0,0 +1,2 @@
+dotnet build
+dotnet coverlet .\Socksy.Core.Test\bin\Debug\net7.0\Socksy.Core.Test.dll --target "dotnet" --targetargs "test .\Socksy.Core.Test --no-build --nologo"