Added unit tests to TechnitiumLibrary.Net.Firewall

.github/workflows/unit-testing.yml

@@ -0,0 +1,41 @@
+name: Unit testing (Windows / MSBuild)
+
+on:
+  workflow_dispatch:
+  push:
+    branches: ["master"]
+  pull_request:
+    branches: ["master"]
+  schedule:
+    - cron: "0 0 * * 0"   # weekly, Sunday 00:00 UTC
+
+permissions:
+  contents: read
+
+jobs:
+  test:
+    runs-on: windows-latest
+
+    env:
+      SOLUTION_NAME: TechnitiumLibrary.sln
+      BUILD_CONFIGURATION: Debug
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install .NET 9 SDK
+        uses: actions/setup-dotnet@v4
+        with:
+          dotnet-version: 9.0.x
+
+      - name: Add MSBuild to PATH
+        uses: microsoft/setup-msbuild@v2
+
+      - name: Restore
+        run: msbuild ${{ env.SOLUTION_NAME }} /t:Restore
+
+      - name: Build
+        run: msbuild ${{ env.SOLUTION_NAME }} /m /p:Configuration=${{ env.BUILD_CONFIGURATION }}
+
+      - name: Test (msbuild)
+        run: msbuild TechnitiumLibrary.UnitTests\TechnitiumLibrary.UnitTests.csproj /t:Test /p:Configuration=${{ env.BUILD_CONFIGURATION }}

README.md

@@ -1,2 +1,6 @@
 # TechnitiumLibrary
 A library for .net based applications.
+
+## Quality Assurance
+
+[![Unit testing (Windows / MSBuild)](https://github.com/TechnitiumSoftware/TechnitiumLibrary/actions/workflows/unit-testing.yml/badge.svg)](https://github.com/TechnitiumSoftware/TechnitiumLibrary/actions/workflows/unit-testing.yml)

TechnitiumLibrary.UnitTests/MSTestSettings.cs

@@ -0,0 +1,3 @@
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+
+[assembly: Parallelize(Scope = ExecutionScope.MethodLevel)]

TechnitiumLibrary.UnitTests/TechnitiumLibrary.Net.Firewall/WindowsFirewallTests.cs

@@ -0,0 +1,80 @@
+/*
+Technitium Library
+Copyright (C) 2026  Shreyas Zare (shreyas@technitium.com)
+Copyright (C) 2026  Zafer Balkan (zafer@zaferbalkan.com)
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+*/
+
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+using System;
+using TechnitiumLibrary.Net.Firewall;
+
+namespace TechnitiumLibrary.UnitTests.TechnitiumLibrary.Net.Firewall
+{
+    [TestClass]
+    public sealed class WindowsFirewallTests
+    {
+        [TestMethod]
+        [OSCondition(OperatingSystems.Windows)]
+        public void AddPort_ShouldThrow_WhenUnsupportedProtocol()
+        {
+            // Protocol ICMPv4 cannot be added using AddPort
+            Assert.ThrowsExactly<Exception>(() => WindowsFirewall.AddPort("bad", Protocol.ICMPv4, port: 55, enable: true));
+        }
+
+        [TestMethod]
+        [OSCondition(OperatingSystems.Windows)]
+        public void RemovePort_ShouldThrow_WhenUnsupportedProtocol()
+        {
+            // RemovePort validates only TCP, UDP, ANY
+            Assert.ThrowsExactly<Exception>(() => WindowsFirewall.RemovePort(Protocol.IGMP, 123));
+        }
+
+        [TestMethod]
+        [OSCondition(OperatingSystems.Windows)]
+        public void PortExists_ShouldThrow_WhenUnsupportedProtocol()
+        {
+            Assert.ThrowsExactly<Exception>(() => WindowsFirewall.PortExists(Protocol.IGMP, 44));
+        }
+
+        [TestMethod]
+        [OSCondition(OperatingSystems.Windows)]
+        public void RuleExistsVista_ShouldReturnDoesNotExist_WhenInputsClearlyNotMatchingAnything()
+        {
+            // Since firewall is not guaranteed to have this rule,
+            // safest expected response is DoesNotExists.
+            RuleStatus result = WindowsFirewall.RuleExistsVista(
+                name: "__Definitely_Not_A_Real_Rule__",
+                applicationPath: "__Fake__");
+
+            Assert.AreEqual(RuleStatus.DoesNotExists, result);
+        }
+
+        [TestMethod]
+        [OSCondition(OperatingSystems.Windows)]
+        public void ApplicationExists_ShouldReturnDoesNotExist_WhenApplicationIsNotRegistered()
+        {
+            // Public observable guarantee:
+            // if the system has no such application entry → DoesNotExists
+
+            const string fakePath = "C:\\DefinitelyNotExisting\\app.exe";
+
+            RuleStatus status = WindowsFirewall.ApplicationExists(fakePath);
+
+            Assert.AreEqual(RuleStatus.DoesNotExists, status);
+        }
+    }
+}

TechnitiumLibrary.UnitTests/TechnitiumLibrary.UnitTests.csproj

@@ -0,0 +1,15 @@
+<Project Sdk="MSTest.Sdk/4.0.1">
+
+  <PropertyGroup>
+    <TargetFramework>net9.0</TargetFramework>
+    <LangVersion>latest</LangVersion>
+    <ImplicitUsings>disable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+    <UseVSTest>true</UseVSTest>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\TechnitiumLibrary.Net.Firewall\TechnitiumLibrary.Net.Firewall.csproj" />
+  </ItemGroup>
+
+</Project>

TechnitiumLibrary.sln

@@ -25,6 +25,8 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "TechnitiumLibrary", "Techni
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "TechnitiumLibrary.Security.OTP", "TechnitiumLibrary.Security.OTP\TechnitiumLibrary.Security.OTP.csproj", "{72AF4EB6-EB81-4655-9998-8BF24B304614}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "TechnitiumLibrary.UnitTests", "TechnitiumLibrary.UnitTests\TechnitiumLibrary.UnitTests.csproj", "{D0CD41D8-E5F0-4EEF-81E3-587A2A877C49}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -75,6 +77,10 @@ Global
 		{72AF4EB6-EB81-4655-9998-8BF24B304614}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{72AF4EB6-EB81-4655-9998-8BF24B304614}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{72AF4EB6-EB81-4655-9998-8BF24B304614}.Release|Any CPU.Build.0 = Release|Any CPU
+		{D0CD41D8-E5F0-4EEF-81E3-587A2A877C49}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{D0CD41D8-E5F0-4EEF-81E3-587A2A877C49}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{D0CD41D8-E5F0-4EEF-81E3-587A2A877C49}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{D0CD41D8-E5F0-4EEF-81E3-587A2A877C49}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE

TechnitiumLibrary/Base32.cs

@@ -317,4 +317,4 @@ public static byte[] FromBase32HexString(string data)
 
         #endregion
     }
-}
+}

TechnitiumLibrary/CollectionExtensions.cs

@@ -112,4 +112,4 @@ public static int GetArrayHashCode<T>(this IReadOnlyCollection<T> value)
             return hashCode;
         }
     }
-}
+}