enable nullable for test projects

test/Common/Program.cs

@@ -10,7 +10,7 @@ partial class Program
     public static int Main(string[] args)
     {
         var testCommandLine = TestCommandLine.HandleCommandLine(args);
-        var newArgs = testCommandLine.RemainingArgs.ToList();
+        List<string> newArgs = testCommandLine.RemainingArgs?.ToList() ?? new List<string>();
 
         // Help argument needs to be the first one to xunit, so don't insert assembly location in that case
         if (testCommandLine.ShouldShowHelp)

test/HelixTasks/CreateLocalHelixTestLayout.cs

@@ -8,18 +8,23 @@ namespace Microsoft.DotNet.SdkCustomHelix.Sdk
     public sealed class CreateLocalHelixTestLayout : Build.Utilities.Task
     {
         [Required]
-        public ITaskItem[] HelixCorrelationPayload { get; set; }
+        public ITaskItem[]? HelixCorrelationPayload { get; set; }
 
         [Required]
-        public string TestOutputDirectory { get; set; }
+        public string? TestOutputDirectory { get; set; }
 
         public override bool Execute()
         {
+            if (HelixCorrelationPayload is null)
+            {
+                return false;
+            };
+
             foreach (var payload in HelixCorrelationPayload)
             {
                 var copyfrom = new DirectoryInfo(payload.GetMetadata("PayloadDirectory"));
                 var relativeDestinationPathOnHelix = payload.GetMetadata("Destination");
-                var destination = new DirectoryInfo(Path.Combine(TestOutputDirectory, relativeDestinationPathOnHelix));
+                var destination = new DirectoryInfo(Path.Combine(TestOutputDirectory ?? string.Empty, relativeDestinationPathOnHelix));
 
                 if (Directory.Exists(destination.FullName))
                 {

test/HelixTasks/HelixTasks.csproj

@@ -5,6 +5,7 @@
     <TargetFrameworks Condition=" '$([MSBuild]::IsOSPlatform(`Windows`))' == 'false' ">net8.0</TargetFrameworks>
     <CopyLocalLockFileAssemblies>true</CopyLocalLockFileAssemblies>
     <RootNamespace>Microsoft.DotNet.SDK.Build.Helix</RootNamespace>
+    <Nullable>enable</Nullable>
   </PropertyGroup>
 
   <ItemGroup>

test/HelixTasks/SDKCustomCreateXUnitWorkItemsWithTestExclusion.cs

@@ -22,7 +22,7 @@ public class SDKCustomCreateXUnitWorkItemsWithTestExclusion : Build.Utilities.Ta
         /// The two required parameters will be automatically created if XUnitProject.Identity is set to the path of the XUnit csproj file
         /// </summary>
         [Required]
-        public ITaskItem[] XUnitProjects { get; set; }
+        public ITaskItem[]? XUnitProjects { get; set; }
 
         /// <summary>
         /// The path to the dotnet executable on the Helix agent. Defaults to "dotnet"
@@ -40,15 +40,15 @@ public class SDKCustomCreateXUnitWorkItemsWithTestExclusion : Build.Utilities.Ta
         /// Optional timeout for all created workitems
         /// Defaults to 300s
         /// </summary>
-        public string XUnitWorkItemTimeout { get; set; }
+        public string? XUnitWorkItemTimeout { get; set; }
 
-        public string XUnitArguments { get; set; }
+        public string? XUnitArguments { get; set; }
 
         /// <summary>
         /// An array of ITaskItems of type HelixWorkItem
         /// </summary>
         [Output]
-        public ITaskItem[] XUnitWorkItems { get; set; }
+        public ITaskItem[]? XUnitWorkItems { get; set; }
 
         /// <summary>
         /// The main method of this MSBuild task which calls the asynchronous execution method and
@@ -71,8 +71,13 @@ public override bool Execute()
         /// <returns></returns>
         private async Task ExecuteAsync()
         {
+            if(XUnitProjects is null)
+            {
+                return;
+            }
+
             XUnitWorkItems = (await Task.WhenAll(XUnitProjects.Select(PrepareWorkItem)))
-                .SelectMany(i => i)
+                .SelectMany(i => i ?? new())
                 .Where(wi => wi != null)
                 .ToArray();
             return;
@@ -83,7 +88,7 @@ private async Task ExecuteAsync()
         /// </summary>
         /// <param name="publishPath">The non-relative path to the publish directory.</param>
         /// <returns>An ITaskItem instance representing the prepared HelixWorkItem.</returns>
-        private async Task<List<ITaskItem>> PrepareWorkItem(ITaskItem xunitProject)
+        private async Task<List<ITaskItem>?> PrepareWorkItem(ITaskItem xunitProject)
         {
             // Forces this task to run asynchronously
             await Task.Yield();
@@ -164,12 +169,12 @@ private async Task<List<ITaskItem>> PrepareWorkItem(ITaskItem xunitProject)
                 Log.LogMessage($"Creating work item with properties Identity: {assemblyName}, PayloadDirectory: {publishDirectory}, Command: {command}");
 
                 partitionedWorkItem.Add(new Microsoft.Build.Utilities.TaskItem(assemblyPartitionInfo.DisplayName + testIdentityDifferentiator, new Dictionary<string, string>()
-                    {
-                        { "Identity", assemblyPartitionInfo.DisplayName + testIdentityDifferentiator},
-                        { "PayloadDirectory", publishDirectory },
-                        { "Command", command },
-                        { "Timeout", timeout.ToString() },
-                    }));
+                {
+                    { "Identity", assemblyPartitionInfo.DisplayName + testIdentityDifferentiator},
+                    { "PayloadDirectory", publishDirectory },
+                    { "Command", command },
+                    { "Timeout", timeout.ToString() },
+                }));
             }
 
             return partitionedWorkItem;

test/HelixTasks/TarGzFileCreateFromDirectory.cs

@@ -12,13 +12,13 @@ public sealed class TarGzFileCreateFromDirectory : ToolTask
         /// The path to the directory to be archived.
         /// </summary>
         [Required]
-        public string SourceDirectory { get; set; }
+        public string? SourceDirectory { get; set; }
 
         /// <summary>
         /// The path of the archive to be created.
         /// </summary>
         [Required]
-        public string DestinationArchive { get; set; }
+        public string? DestinationArchive { get; set; }
 
         /// <summary>
         /// Indicates if the destination archive should be overwritten if it already exists.
@@ -33,7 +33,7 @@ public sealed class TarGzFileCreateFromDirectory : ToolTask
         /// <summary>
         /// An item group of regular expressions for content to exclude from the archive.
         /// </summary>
-        public ITaskItem[] ExcludePatterns { get; set; }
+        public ITaskItem[]? ExcludePatterns { get; set; } 
 
         public bool IgnoreExitCode { get; set; }
 
@@ -69,16 +69,18 @@ protected override bool ValidateParameters()
                     retVal = false;
                 }
             }
+            if (SourceDirectory is not null)
+            {
+                SourceDirectory = Path.GetFullPath(SourceDirectory);
 
-            SourceDirectory = Path.GetFullPath(SourceDirectory);
-
-            SourceDirectory = SourceDirectory.EndsWith(Path.DirectorySeparatorChar.ToString())
-                ? SourceDirectory
-                : SourceDirectory + Path.DirectorySeparatorChar;
+                SourceDirectory = SourceDirectory.EndsWith(Path.DirectorySeparatorChar.ToString())
+                    ? SourceDirectory
+                    : SourceDirectory + Path.DirectorySeparatorChar;
+            }
 
             if (!Directory.Exists(SourceDirectory))
             {
-                Log.LogError($"SourceDirectory '{SourceDirectory} does not exist.");
+                Log.LogError($"SourceDirectory '{SourceDirectory}' does not exist.");
 
                 retVal = false;
             }
@@ -113,9 +115,9 @@ protected override string GenerateCommandLineCommands()
 
         private string GetSourceSpecification()
         {
-            if (IncludeBaseDirectory)
+            if (SourceDirectory is not null && IncludeBaseDirectory)
             {
-                var parentDirectory = Directory.GetParent(SourceDirectory).Parent.FullName;
+                var parentDirectory = Directory.GetParent(SourceDirectory)?.Parent?.FullName;
 
                 var sourceDirectoryName = Path.GetFileName(Path.GetDirectoryName(SourceDirectory));
 

test/Microsoft.NET.Build.Containers.IntegrationTests/EndToEndTests.cs

@@ -341,16 +341,16 @@ public async Task EndToEnd_NoAPI_ProjectType(string projectType, bool addPackage
         {
             File.Copy(Path.Combine(TestContext.Current.TestExecutionDirectory, "NuGet.config"), Path.Combine(newProjectDir.FullName, "NuGet.config"));
 
-            (string packagePath, string packageVersion) = ToolsetUtils.GetContainersPackagePath();
+            (string? packagePath, string? packageVersion) = ToolsetUtils.GetContainersPackagePath();
 
-            new DotnetCommand(_testOutput, "nuget", "add", "source", Path.GetDirectoryName(packagePath), "--name", "local-temp")
+            new DotnetCommand(_testOutput, "nuget", "add", "source", Path.GetDirectoryName(packagePath) ?? string.Empty, "--name", "local-temp")
                 .WithEnvironmentVariable("NUGET_PACKAGES", privateNuGetAssets.FullName)
                 .WithWorkingDirectory(newProjectDir.FullName)
                 .Execute()
                 .Should().Pass();
 
             // Add package to the project
-            new DotnetCommand(_testOutput, "add", "package", "Microsoft.NET.Build.Containers", "-f", ToolsetInfo.CurrentTargetFramework, "-v", packageVersion)
+            new DotnetCommand(_testOutput, "add", "package", "Microsoft.NET.Build.Containers", "-f", ToolsetInfo.CurrentTargetFramework, "-v", packageVersion ?? string.Empty)
                 .WithEnvironmentVariable("NUGET_PACKAGES", privateNuGetAssets.FullName)
                 .WithWorkingDirectory(newProjectDir.FullName)
                 .Execute()
@@ -512,16 +512,16 @@ public void EndToEnd_NoAPI_Console()
 
         File.Copy(Path.Combine(TestContext.Current.TestExecutionDirectory, "NuGet.config"), Path.Combine(newProjectDir.FullName, "NuGet.config"));
 
-        (string packagePath, string packageVersion) = ToolsetUtils.GetContainersPackagePath();
+        (string? packagePath, string? packageVersion) = ToolsetUtils.GetContainersPackagePath();
 
-        new DotnetCommand(_testOutput, "nuget", "add", "source", Path.GetDirectoryName(packagePath), "--name", "local-temp")
+        new DotnetCommand(_testOutput, "nuget", "add", "source", Path.GetDirectoryName(packagePath) ?? string.Empty, "--name", "local-temp")
             .WithEnvironmentVariable("NUGET_PACKAGES", privateNuGetAssets.FullName)
             .WithWorkingDirectory(newProjectDir.FullName)
             .Execute()
             .Should().Pass();
 
         // Add package to the project
-        new DotnetCommand(_testOutput, "add", "package", "Microsoft.NET.Build.Containers", "-f", _oldFramework , "-v", packageVersion)
+        new DotnetCommand(_testOutput, "add", "package", "Microsoft.NET.Build.Containers", "-f", _oldFramework , "-v", packageVersion ?? string.Empty)
             .WithEnvironmentVariable("NUGET_PACKAGES", privateNuGetAssets.FullName)
             .WithWorkingDirectory(newProjectDir.FullName)
             .Execute()

test/Microsoft.NET.Build.Containers.IntegrationTests/PackageTests.cs

@@ -131,8 +131,8 @@ public void PackageContentTest()
               $"tasks/{netTFM}/Valleysoft.DockerCredsProvider.dll"
         };
 
-        (string packageFilePath, string packageVersion) = ToolsetUtils.GetContainersPackagePath();
-        using ZipArchive archive = new(File.OpenRead(packageFilePath), ZipArchiveMode.Read, false);
+        (string? packageFilePath, string? packageVersion) = ToolsetUtils.GetContainersPackagePath();
+        using ZipArchive archive = new(File.OpenRead(packageFilePath ?? string.Empty), ZipArchiveMode.Read, false);
 
         IEnumerable<string> actualEntries = archive.Entries
             .Select(e => e.FullName)

test/Microsoft.NET.Build.Containers.IntegrationTests/ProjectInitializer.cs

@@ -10,7 +10,7 @@ namespace Microsoft.NET.Build.Containers.IntegrationTests;
 
 public sealed class ProjectInitializer
 {
-    private static readonly string _combinedTargetsLocation;
+    private static readonly string? _combinedTargetsLocation;
 
     static ProjectInitializer()
     {

test/Microsoft.NET.Build.Containers.IntegrationTests/ToolsetUtils.cs

@@ -20,18 +20,18 @@ internal static string GetRuntimeGraphFilePath()
     /// Gets path to built Microsoft.NET.Build.Containers.*.nupkg prepared for tests.
     /// </summary>
     /// <returns></returns>
-    internal static (string PackagePath, string PackageVersion) GetContainersPackagePath()
+    internal static (string? PackagePath, string? PackageVersion) GetContainersPackagePath()
     {
         string packageDir = Path.Combine(TestContext.Current.TestExecutionDirectory, "Container", "package");
 
         //until the package is stabilized, the package version matches TestContext.Current.ToolsetUnderTest.SdkVersion
         //after the package is stabilized, the package version doesn't have -prefix (-dev, -ci) anymore
         //so one of those is expected
-        string[] expectedPackageVersions = new[] { TestContext.Current.ToolsetUnderTest.SdkVersion, TestContext.Current.ToolsetUnderTest.SdkVersion.Split('-')[0] };
+        string?[] expectedPackageVersions = new[] { TestContext.Current.ToolsetUnderTest?.SdkVersion, TestContext.Current.ToolsetUnderTest?.SdkVersion?.Split('-')[0] };
 
-        foreach (string expectedVersion in expectedPackageVersions)
+        foreach (string? expectedVersion in expectedPackageVersions)
         {
-            string fullFileName = Path.Combine(packageDir, $"Microsoft.NET.Build.Containers.{expectedVersion}.nupkg");
+            string? fullFileName = Path.Combine(packageDir, $"Microsoft.NET.Build.Containers.{expectedVersion}.nupkg");
             if (File.Exists(fullFileName))
             {
                 return (fullFileName, expectedVersion);