Add cross-platform unit tests with MSTest framework

.github/workflows/build.yaml

@@ -9,8 +9,46 @@ on:
         type: string
 
 jobs:
+  test:
+    name: Test (${{ matrix.os }})
+    runs-on: ${{ matrix.os }}
+    permissions:
+      contents: read
+    strategy:
+      matrix:
+        os: [ubuntu-latest, windows-latest, macos-latest]
+    steps:
+
+    - uses: actions/checkout@v6
+
+    - name: Setup dotnet
+      uses: actions/setup-dotnet@v5
+      with:
+        dotnet-version: |
+          8.x          
+          9.x
+          10.x
+
+    - name: Build
+      run: >
+        dotnet build
+        --configuration Release
+        --property:Version=${{ inputs.semver }}
+        --property:InformationalVersion=${{ inputs.semver }}
+        --property:AssemblyVersion=${{ inputs.winver }}
+
+    - name: Test
+      run: >
+        dotnet test
+        --configuration Release
+        --no-build
+
   build:
+    name: Build Artifacts
+    needs: test
     runs-on: ubuntu-latest
+    permissions:
+      contents: read
     steps:
 
     - uses: actions/checkout@v6

.gitignore

@@ -1,3 +1,7 @@
 .vs
 *.bak
 node_modules
+bin/
+obj/
+TestResults/
+drop/

DemaConsulting.DotnetToolWrapper.sln

@@ -5,6 +5,8 @@ VisualStudioVersion = 17.9.34622.214
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "DemaConsulting.DotnetToolWrapper", "src\DemaConsulting.DotnetToolWrapper\DemaConsulting.DotnetToolWrapper.csproj", "{9381FBF3-DCAE-4D2E-9F20-341FDDD38537}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "DemaConsulting.DotnetToolWrapper.Tests", "test\DemaConsulting.DotnetToolWrapper.Tests\DemaConsulting.DotnetToolWrapper.Tests.csproj", "{8E5F3A42-1D5B-4C9E-8F1D-2C3F4D5E6F7A}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -15,6 +17,10 @@ Global
 		{9381FBF3-DCAE-4D2E-9F20-341FDDD38537}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{9381FBF3-DCAE-4D2E-9F20-341FDDD38537}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{9381FBF3-DCAE-4D2E-9F20-341FDDD38537}.Release|Any CPU.Build.0 = Release|Any CPU
+		{8E5F3A42-1D5B-4C9E-8F1D-2C3F4D5E6F7A}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{8E5F3A42-1D5B-4C9E-8F1D-2C3F4D5E6F7A}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{8E5F3A42-1D5B-4C9E-8F1D-2C3F4D5E6F7A}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{8E5F3A42-1D5B-4C9E-8F1D-2C3F4D5E6F7A}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE

test/DemaConsulting.DotnetToolWrapper.Tests/DemaConsulting.DotnetToolWrapper.Tests.csproj

@@ -0,0 +1,39 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFrameworks>net8.0;net9.0;net10.0</TargetFrameworks>
+    <LangVersion>12</LangVersion>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+    <IsPackable>false</IsPackable>
+    <IsTestProject>true</IsTestProject>
+    <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
+    <EnforceCodeStyleInBuild>true</EnforceCodeStyleInBuild>
+    <EnableNETAnalyzers>true</EnableNETAnalyzers>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="coverlet.collector" Version="6.0.2">
+      <PrivateAssets>all</PrivateAssets>
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+    </PackageReference>
+    <PackageReference Include="Microsoft.CodeAnalysis.NetAnalyzers" Version="9.0.0">
+      <PrivateAssets>all</PrivateAssets>
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+    </PackageReference>
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.12.0" />
+    <PackageReference Include="MSTest.TestAdapter" Version="3.7.0" />
+    <PackageReference Include="MSTest.TestFramework" Version="3.7.0" />
+    <PackageReference Include="SonarAnalyzer.CSharp" Version="10.4.0.108396">
+      <PrivateAssets>all</PrivateAssets>
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+    </PackageReference>
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\..\src\DemaConsulting.DotnetToolWrapper\DemaConsulting.DotnetToolWrapper.csproj">
+      <CopyLocalLockFileAssemblies>true</CopyLocalLockFileAssemblies>
+    </ProjectReference>
+  </ItemGroup>
+
+</Project>

test/DemaConsulting.DotnetToolWrapper.Tests/IntegrationTests.cs

@@ -0,0 +1,253 @@
+using System.Runtime.InteropServices;
+using System.Text.Json;
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+
+namespace DemaConsulting.DotnetToolWrapper.Tests;
+
+/// <summary>
+/// Integration tests for the DotnetToolWrapper application
+/// </summary>
+[TestClass]
+public class IntegrationTests
+{
+    /// <summary>
+    /// Test setup directory
+    /// </summary>
+    private string _testDirectory = string.Empty;
+
+    /// <summary>
+    /// Initialize test
+    /// </summary>
+    [TestInitialize]
+    public void TestInitialize()
+    {
+        // Create a unique test directory
+        _testDirectory = Path.Combine(Path.GetTempPath(), $"DotnetToolWrapperTests_{Guid.NewGuid()}");
+        Directory.CreateDirectory(_testDirectory);
+    }
+
+    /// <summary>
+    /// Cleanup test
+    /// </summary>
+    [TestCleanup]
+    public void TestCleanup()
+    {
+        // Clean up test directory
+        if (Directory.Exists(_testDirectory))
+        {
+            Directory.Delete(_testDirectory, true);
+        }
+
+        // Clean up config file next to DLL
+        var dllPath = GetDotnetToolWrapperDllPath();
+        var dllDirectory = Path.GetDirectoryName(dllPath);
+        if (dllDirectory != null)
+        {
+            var configPath = Path.Combine(dllDirectory, "DotnetToolWrapper.json");
+            if (File.Exists(configPath))
+            {
+                File.Delete(configPath);
+            }
+        }
+    }
+
+    /// <summary>
+    /// Get the path to the DotnetToolWrapper DLL
+    /// </summary>
+    /// <returns>Path to DLL</returns>
+    private static string GetDotnetToolWrapperDllPath()
+    {
+        var assemblyLocation = Path.GetDirectoryName(typeof(IntegrationTests).Assembly.Location);
+        Assert.IsNotNull(assemblyLocation, "Assembly location should not be null");
+        return Path.Combine(assemblyLocation, "DemaConsulting.DotnetToolWrapper.dll");
+    }
+
+    /// <summary>
+    /// Create a DotnetToolWrapper.json configuration file
+    /// </summary>
+    /// <param name="program">Program to execute</param>
+    /// <param name="directory">Directory for config file (defaults to DLL directory)</param>
+    private static void CreateConfigFile(string program, string? directory = null)
+    {
+        // Default to DLL directory
+        if (directory == null)
+        {
+            var dllPath = GetDotnetToolWrapperDllPath();
+            directory = Path.GetDirectoryName(dllPath);
+            Assert.IsNotNull(directory, "DLL directory should not be null");
+        }
+
+        var target = Program.GetTarget();
+
+        var json = JsonSerializer.Serialize(new Dictionary<string, object>
+        {
+            { target, new { program } }
+        });
+
+        File.WriteAllText(Path.Combine(directory, "DotnetToolWrapper.json"), json);
+    }
+
+    /// <summary>
+    /// Get the shell program name for the current OS
+    /// </summary>
+    /// <returns>Shell program name</returns>
+    private static string GetShellProgram()
+    {
+        return RuntimeInformation.IsOSPlatform(OSPlatform.Windows) ? "cmd.exe" : "/bin/sh";
+    }
+
+    /// <summary>
+    /// Get shell arguments for exit code test
+    /// </summary>
+    /// <param name="exitCode">Exit code to test</param>
+    /// <returns>Shell arguments</returns>
+    private static string[] GetExitCodeArgs(int exitCode)
+    {
+        return RuntimeInformation.IsOSPlatform(OSPlatform.Windows)
+            ? ["/c", $"exit {exitCode}"]
+            : ["-c", $"exit {exitCode}"];
+    }
+
+    /// <summary>
+    /// Get shell arguments for echo test
+    /// </summary>
+    /// <param name="text">Text to echo</param>
+    /// <returns>Shell arguments</returns>
+    private static string[] GetEchoArgs(string text)
+    {
+        return RuntimeInformation.IsOSPlatform(OSPlatform.Windows)
+            ? ["/c", $"echo {text}"]
+            : ["-c", $"echo {text}"];
+    }
+
+    /// <summary>
+    /// Test that missing configuration file results in expected error
+    /// </summary>
+    [TestMethod]
+    public void TestMissingConfigFile()
+    {
+        // Arrange
+        var dllPath = GetDotnetToolWrapperDllPath();
+
+        // Act
+        var exitCode = Runner.Run(out var output, "dotnet", dllPath);
+
+        // Assert
+        Assert.AreEqual(1, exitCode, "Exit code should be 1 for missing config file");
+        Assert.IsTrue(output.Contains("Missing configuration file"), "Output should mention missing config file");
+        Assert.IsTrue(output.Contains("DotnetToolWrapper.json"), "Output should mention config file name");
+    }
+
+    /// <summary>
+    /// Test that exit codes are properly passed through
+    /// </summary>
+    [TestMethod]
+    [DataRow(0)]
+    [DataRow(1)]
+    [DataRow(42)]
+    [DataRow(255)]
+    public void TestExitCodes(int expectedExitCode)
+    {
+        // Arrange
+        var dllPath = GetDotnetToolWrapperDllPath();
+        var shellProgram = GetShellProgram();
+
+        // Create config file pointing to shell
+        CreateConfigFile(shellProgram);
+
+        // Get shell arguments to exit with specific code
+        var shellArgs = GetExitCodeArgs(expectedExitCode);
+
+        // Prepare arguments for dotnet command
+        var args = new List<string> { dllPath };
+        args.AddRange(shellArgs);
+
+        // Act
+        var exitCode = Runner.Run(out _, "dotnet", args.ToArray());
+
+        // Assert
+        Assert.AreEqual(expectedExitCode, exitCode, $"Exit code should be {expectedExitCode}");
+    }
+
+    /// <summary>
+    /// Test that arguments are properly passed through
+    /// </summary>
+    [TestMethod]
+    public void TestArgumentPassing()
+    {
+        // Arrange
+        var dllPath = GetDotnetToolWrapperDllPath();
+        var shellProgram = GetShellProgram();
+        var testText = "HelloWorld";
+
+        // Create config file pointing to shell
+        CreateConfigFile(shellProgram);
+
+        // Get shell arguments to echo text
+        var shellArgs = GetEchoArgs(testText);
+
+        // Prepare arguments for dotnet command
+        var args = new List<string> { dllPath };
+        args.AddRange(shellArgs);
+
+        // Act
+        var exitCode = Runner.Run(out var output, "dotnet", args.ToArray());
+
+        // Assert
+        Assert.AreEqual(0, exitCode, "Exit code should be 0");
+        Assert.IsTrue(output.Contains(testText), $"Output should contain '{testText}'");
+    }
+
+    /// <summary>
+    /// Test that unsupported target results in expected error
+    /// </summary>
+    [TestMethod]
+    public void TestUnsupportedTarget()
+    {
+        // Arrange
+        var dllPath = GetDotnetToolWrapperDllPath();
+        var dllDirectory = Path.GetDirectoryName(dllPath);
+        Assert.IsNotNull(dllDirectory, "DLL directory should not be null");
+
+        // Create config file with fake target
+        var json = JsonSerializer.Serialize(new Dictionary<string, object>
+        {
+            { "fake-target", new { program = "fake" } }
+        });
+        File.WriteAllText(Path.Combine(dllDirectory, "DotnetToolWrapper.json"), json);
+
+        // Act
+        var exitCode = Runner.Run(out var output, "dotnet", dllPath);
+
+        // Assert
+        Assert.AreEqual(1, exitCode, "Exit code should be 1 for unsupported target");
+        Assert.IsTrue(output.Contains("does not support"), "Output should mention unsupported target");
+    }
+
+    /// <summary>
+    /// Test that bad configuration results in expected error
+    /// </summary>
+    [TestMethod]
+    public void TestBadConfiguration()
+    {
+        // Arrange
+        var dllPath = GetDotnetToolWrapperDllPath();
+        var dllDirectory = Path.GetDirectoryName(dllPath);
+        Assert.IsNotNull(dllDirectory, "DLL directory should not be null");
+        var target = Program.GetTarget();
+
+        // Create config file without program property
+        var json = JsonSerializer.Serialize(new Dictionary<string, object>
+        {
+            { target, new { notprogram = "fake" } }
+        });
+        File.WriteAllText(Path.Combine(dllDirectory, "DotnetToolWrapper.json"), json);
+
+        // Act
+        var exitCode = Runner.Run(out var output, "dotnet", dllPath);
+
+        // Assert
+        Assert.AreEqual(1, exitCode, "Exit code should be 1 for bad configuration");
+        Assert.IsTrue(output.Contains("Bad configuration"), "Output should mention bad configuration");
+    }
+}