Add WasiPlayground and don't use hashing on Wasi

Microsoft.Testing.Platform.slnf

@@ -4,6 +4,7 @@
     "projects": [
       "samples\\FSharpPlayground\\FSharpPlayground.fsproj",
       "samples\\Playground\\Playground.csproj",
+      "samples\\WasiPlayground\\WasiPlayground.csproj",
       "src\\Platform\\Microsoft.Testing.Extensions.AzureDevOpsReport\\Microsoft.Testing.Extensions.AzureDevOpsReport.csproj",
       "src\\Platform\\Microsoft.Testing.Extensions.AzureFoundry\\Microsoft.Testing.Extensions.AzureFoundry.csproj",
       "src\\Platform\\Microsoft.Testing.Extensions.CrashDump\\Microsoft.Testing.Extensions.CrashDump.csproj",

TestFx.slnx

@@ -3,6 +3,7 @@
     <Project Path="samples/FSharpPlayground/FSharpPlayground.fsproj" />
     <Project Path="samples/FxExtensibility/FxExtensibility.csproj" />
     <Project Path="samples/Playground/Playground.csproj" />
+    <Project Path="samples/WasiPlayground/WasiPlayground.csproj" />
   </Folder>
   <Folder Name="/Solution Items/">
     <File Path=".editorconfig" />
@@ -72,6 +73,7 @@
     <Project Path="src/Package/MSTest.Sdk/MSTest.Sdk.csproj" />
     <Project Path="src/Package/MSTest/MSTest.csproj" />
   </Folder>
+  <Folder Name="/src/Platform/" />
   <Folder Name="/test/">
     <File Path="test/.editorconfig" />
     <File Path="test/Directory.Build.props" />

samples/WasiPlayground/Program.cs

@@ -0,0 +1,52 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
+using Microsoft.Testing.Extensions;
+using Microsoft.Testing.Platform.Builder;
+using Microsoft.Testing.Platform.Capabilities.TestFramework;
+using Microsoft.Testing.Platform.Extensions.Messages;
+using Microsoft.Testing.Platform.Extensions.TestFramework;
+
+ITestApplicationBuilder testApplicationBuilder = await TestApplication.CreateBuilderAsync(args);
+
+testApplicationBuilder.RegisterTestFramework(_ => new TestFrameworkCapabilities(), (_, _) => new DummyFramework());
+
+testApplicationBuilder.AddTrxReportProvider();
+testApplicationBuilder.AddAppInsightsTelemetryProvider();
+testApplicationBuilder.AddCrashDumpProvider();
+testApplicationBuilder.AddHangDumpProvider();
+testApplicationBuilder.AddAzureDevOpsProvider();
+using ITestApplication testApplication = await testApplicationBuilder.BuildAsync();
+return await testApplication.RunAsync();
+
+internal sealed class DummyFramework : ITestFramework, IDataProducer
+{
+    public string Uid => nameof(DummyFramework);
+
+    public string Version => "1.0.0";
+
+    public string DisplayName => "DummyFramework";
+
+    public string Description => DisplayName;
+
+    public Type[] DataTypesProduced => [typeof(TestNodeUpdateMessage)];
+
+    public Task<CloseTestSessionResult> CloseTestSessionAsync(CloseTestSessionContext context)
+        => Task.FromResult(new CloseTestSessionResult() { IsSuccess = true });
+
+    public Task<CreateTestSessionResult> CreateTestSessionAsync(CreateTestSessionContext context)
+        => Task.FromResult(new CreateTestSessionResult() { IsSuccess = true });
+
+    public async Task ExecuteRequestAsync(ExecuteRequestContext context)
+    {
+        await context.MessageBus.PublishAsync(this, new TestNodeUpdateMessage(context.Request.Session.SessionUid, new TestNode()
+        {
+            DisplayName = "Test display name",
+            Uid = "Uid1",
+            Properties = new PropertyBag(PassedTestNodeStateProperty.CachedInstance),
+        }));
+        context.Complete();
+    }
+
+    public Task<bool> IsEnabledAsync() => Task.FromResult(true);
+}

samples/WasiPlayground/README.md

@@ -0,0 +1,21 @@
+# WasiPlayground
+
+To run this project:
+
+1. Run `dotnet workload install wasi-experimental`
+2. Run `dotnet build`
+3. Install wasmtime. See docs at <https://docs.wasmtime.dev/cli-install.html>.
+4. Open command-line in AppBundle directory (`artifacts\bin\WasiPlayground\Debug\net10.0\wasi-wasm\AppBundle`)
+5. Run `wasmtime run --wasi http --dir . -- dotnet.wasm WasiPlayground`
+
+## Status
+
+As of today, this will produce this exception (it's not yet supported by MTP).
+
+```console
+Unhandled Exception:
+System.PlatformNotSupportedException: Arg_PlatformNotSupported
+   at System.Threading.Tasks.Task.InternalWaitCore(Int32 millisecondsTimeout, CancellationToken cancellationToken)
+   at System.Threading.Tasks.Task.InternalWait(Int32 millisecondsTimeout, CancellationToken cancellationToken)
+   at Program.<Main>(String[] args)
+```

samples/WasiPlayground/WasiPlayground.csproj

@@ -0,0 +1,29 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFrameworks>net10.0</TargetFrameworks>
+    <RuntimeIdentifier>wasi-wasm</RuntimeIdentifier>
+    <PublishTrimmed>true</PublishTrimmed>
+
+    <Nullable>enable</Nullable>
+    <OutputType>Exe</OutputType>
+    <IsTestingPlatformApplication>true</IsTestingPlatformApplication>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="$(RepoRoot)src\Platform\Microsoft.Testing.Platform\Microsoft.Testing.Platform.csproj" />
+    <ProjectReference Include="$(RepoRoot)src\Platform\Microsoft.Testing.Extensions.CrashDump\Microsoft.Testing.Extensions.CrashDump.csproj" />
+    <ProjectReference Include="$(RepoRoot)src\Platform\Microsoft.Testing.Extensions.HangDump\Microsoft.Testing.Extensions.HangDump.csproj" />
+    <ProjectReference Include="$(RepoRoot)src\Platform\Microsoft.Testing.Extensions.TrxReport\Microsoft.Testing.Extensions.TrxReport.csproj" />
+    <ProjectReference Include="$(RepoRoot)src\Platform\Microsoft.Testing.Extensions.Telemetry\Microsoft.Testing.Extensions.Telemetry.csproj" />
+    <ProjectReference Include="$(RepoRoot)src\Platform\Microsoft.Testing.Extensions.AzureDevOpsReport\Microsoft.Testing.Extensions.AzureDevOpsReport.csproj" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectCapability Include="DiagnoseCapabilities" />
+    <ProjectCapability Include="TestingPlatformServer" />
+    <ProjectCapability Include="TestContainer" />
+  </ItemGroup>
+
+</Project>

src/Platform/Microsoft.Testing.Extensions.HotReload/HotReloadHandler.cs

@@ -46,6 +46,7 @@ public HotReloadHandler(IConsole console, IOutputDevice outputDevice, IOutputDev
     [SupportedOSPlatformGuard("android")]
     [SupportedOSPlatformGuard("ios")]
     [SupportedOSPlatformGuard("tvos")]
+    [SupportedOSPlatformGuard("wasi")]
     [SupportedOSPlatformGuard("browser")]
     private static bool IsCancelKeyPressNotSupported()
         => RuntimeInformation.IsOSPlatform(OSPlatform.Create("ANDROID")) ||

src/Platform/Microsoft.Testing.Platform/Helpers/Sha256Hasher.cs

@@ -10,36 +10,12 @@ namespace Microsoft.Testing.Platform.Helpers;
 [ExcludeFromCodeCoverage]
 internal static class Sha256Hasher
 {
+    // https://github.com/dotnet/runtime/issues/99126
+    [UnsupportedOSPlatform("wasi")]
     public static string HashWithNormalizedCasing(string text)
     {
-        try
-        {
-            byte[] bytes = Encoding.UTF8.GetBytes(text.ToUpperInvariant());
-            byte[] hash = SHA256.HashData(bytes);
-            return Convert.ToHexStringLower(hash);
-        }
-        catch (PlatformNotSupportedException)
-        {
-            // SHA256 is not supported on WASM WASI and similar platforms.
-            // Fall back to a simple non-cryptographic hash for telemetry purposes.
-            return ComputeNonCryptographicHash(text.ToUpperInvariant());
-        }
-    }
-
-    private static string ComputeNonCryptographicHash(string text)
-    {
-        // Use a simple deterministic hash for platforms without SHA256 support.
-        // This is sufficient for telemetry correlation purposes.
-        int hash = text.GetHashCode();
-        byte[] hashBytes = BitConverter.GetBytes(hash);
-
-        // Expand to 32 bytes (SHA256 size) for consistency by repeating the pattern
-        byte[] expandedHash = new byte[32];
-        for (int i = 0; i < expandedHash.Length; i++)
-        {
-            expandedHash[i] = hashBytes[i % hashBytes.Length];
-        }
-
-        return Convert.ToHexStringLower(expandedHash);
+        byte[] bytes = Encoding.UTF8.GetBytes(text.ToUpperInvariant());
+        byte[] hash = SHA256.HashData(bytes);
+        return Convert.ToHexStringLower(hash);
     }
 }

src/Platform/Microsoft.Testing.Platform/Helpers/System/ITask.cs

@@ -12,6 +12,8 @@ internal interface ITask
 
     Task<T> Run<T>(Func<Task<T>?> function, CancellationToken cancellationToken);
 
+    [UnsupportedOSPlatform("browser")]
+    [UnsupportedOSPlatform("wasi")]
     Task RunLongRunning(Func<Task> action, string name, CancellationToken cancellationToken);
 
     Task WhenAll(params Task[] tasks);

src/Platform/Microsoft.Testing.Platform/Helpers/System/SystemTask.cs

@@ -15,6 +15,7 @@ public Task<T> Run<T>(Func<Task<T>?> function, CancellationToken cancellationTok
         => Task.Run(function, cancellationToken);
 
     [UnsupportedOSPlatform("browser")]
+    [UnsupportedOSPlatform("wasi")]
     public Task RunLongRunning(Func<Task> action, string name, CancellationToken cancellationToken)
     {
         // We create custom thread so we can assign the name that will help us to identify the thread in the dump

src/Platform/Microsoft.Testing.Platform/Hosts/TestHostBuilder.cs

@@ -648,7 +648,11 @@ private void AddApplicationTelemetryMetadata(IServiceProvider serviceProvider, D
             ?? _testApplicationModuleInfo.TryGetAssemblyName()
             ?? "unknown";
 
-        builderMetadata[TelemetryProperties.HostProperties.TestHostPropertyName] = Sha256Hasher.HashWithNormalizedCasing(moduleName);
+        if (!RuntimeInformation.IsOSPlatform(OSPlatform.Create("WASI")))
+        {
+            builderMetadata[TelemetryProperties.HostProperties.TestHostPropertyName] = Sha256Hasher.HashWithNormalizedCasing(moduleName);
+        }
+
         builderMetadata[TelemetryProperties.HostProperties.FrameworkDescriptionPropertyName] = RuntimeInformation.FrameworkDescription;
         builderMetadata[TelemetryProperties.HostProperties.ProcessArchitecturePropertyName] = RuntimeInformation.ProcessArchitecture;
         builderMetadata[TelemetryProperties.HostProperties.OSArchitecturePropertyName] = RuntimeInformation.OSArchitecture;

src/Platform/Microsoft.Testing.Platform/OutputDevice/Terminal/NonAnsiTerminal.cs

@@ -41,6 +41,7 @@ public override void ResetColor()
     [SupportedOSPlatformGuard("android")]
     [SupportedOSPlatformGuard("ios")]
     [SupportedOSPlatformGuard("tvos")]
+    [SupportedOSPlatformGuard("wasi")]
     [SupportedOSPlatformGuard("browser")]
     private bool IsForegroundColorNotSupported()
     {

src/Platform/Microsoft.Testing.Platform/Services/CTRLPlusCCancellationTokenSource.cs

@@ -24,6 +24,7 @@ public CTRLPlusCCancellationTokenSource(IConsole? console = null, ILogger? logge
     [SupportedOSPlatformGuard("android")]
     [SupportedOSPlatformGuard("ios")]
     [SupportedOSPlatformGuard("tvos")]
+    [SupportedOSPlatformGuard("wasi")]
     [SupportedOSPlatformGuard("browser")]
     private static bool IsCancelKeyPressNotSupported()
         => RuntimeInformation.IsOSPlatform(OSPlatform.Create("ANDROID")) ||

src/Platform/Microsoft.Testing.Platform/Telemetry/ExtensionInformationCollector.cs

@@ -16,8 +16,15 @@ namespace Microsoft.Testing.Platform.Telemetry;
 
 internal static class ExtensionInformationCollector
 {
-    public static async Task<string> CollectAndSerializeToJsonAsync(ServiceProvider serviceProvider)
+    public static async Task<string?> CollectAndSerializeToJsonAsync(ServiceProvider serviceProvider)
     {
+        if (RuntimeInformation.IsOSPlatform(OSPlatform.Create("WASI")))
+        {
+            // HashWithNormalizedCasing not supported on WASI at time of writing.
+            // https://github.com/dotnet/runtime/issues/99126
+            return null;
+        }
+
         HashSet<ExtensionInformation> extensionsInformation = [];
 
         foreach (object service in serviceProvider.Services)