Test templates (dotnet#6086)

Leveraging [template testing infra](https://github.com/dotnet/templating/wiki/Templates-Testing-Tooling) for a basic test of the AI template. More tests can be added later.
During a test the template is getting installed locally and then a new app is created, which is then gets snapshot-verified using Verify tooling.

For the local devex, it is very much worth installing [Verify DiffEngineTray](https://github.com/VerifyTests/DiffEngine/blob/main/docs/tray.md) to approve all incoming snapshots (for the initial iteration).
It is also possible that git block staging the snapshot files due to line ending issues, and "git config core.safecrlf false" could be used as a way to work around this.

Author: RussKie

.gitignore

@@ -50,6 +50,7 @@ TestResult.xml
 
 # VERIFY
 *.received.*
+**/*.received/
 
 # Build Results of an ATL Project
 [Dd]ebugPS/

eng/Versions.props

@@ -157,5 +157,11 @@
     <!-- Compatibility with VS 17.8/.NET SDK 8.0.1xx -->
     <MicrosoftCodeAnalysisVersion>4.8.0</MicrosoftCodeAnalysisVersion>
     <MicrosoftCodeAnalysisAnalyzersVersion>3.3.4</MicrosoftCodeAnalysisAnalyzersVersion>
+
+    <!--
+      xUnit version is configured by the Arcade SDK.
+      https://github.com/dotnet/arcade/blob/f5a7c5d5c56197b09715dece7541ca06beb94eb0/src/Microsoft.DotNet.Arcade.Sdk/tools/XUnit/XUnit.targets#L9
+     -->
+    <XUnitVersion>2.9.3</XUnitVersion>
   </PropertyGroup>
 </Project>

eng/build.proj

@@ -1,13 +1,16 @@
 <Project Sdk="Microsoft.Build.Traversal">
   <ItemGroup>
+    <_SnapshotsToExclude Include="$(MSBuildThisFileDirectory)..\test\**\Snapshots\**\*.*proj" />
+
     <!-- We recursively add all of the projects inside the src directory, except for the exclusions above -->
-    <_ProjectsToBuild Include="$(MSBuildThisFileDirectory)..\src\**\*.csproj" Exclude="@(_ProjectsToExclude)" />
+    <_ProjectsToBuild Include="$(MSBuildThisFileDirectory)..\src\**\*.csproj" />
     <!-- We recursively add all of the test projects -->
     <_ProjectsToBuild Include="$(MSBuildThisFileDirectory)..\test\**\*.csproj" />
     <_ProjectsToBuild Include="$(MSBuildThisFileDirectory)..\bench\**\*.csproj" />
     <!-- Additionally, include the transport project that is not defined as a csproj -->
     <_ProjectsToBuild Include="$(MSBuildThisFileDirectory)..\src\Packages\Microsoft.Internal.Extensions.DotNetApiDocs.Transport\Microsoft.Internal.Extensions.DotNetApiDocs.Transport.proj" />
+
     <!-- Add all the projects we want to build as project references, so the traversal SDK can build them -->
-    <ProjectReference Include="@(_ProjectsToBuild)" />
+    <ProjectReference Include="@(_ProjectsToBuild)" Exclude="@(_ProjectsToExclude);@(_SnapshotsToExclude)" />
   </ItemGroup>
 </Project>

eng/packages/General.props

@@ -26,7 +26,7 @@
     <PackageVersion Include="System.Memory" Version="4.5.5" />
     <PackageVersion Include="System.Private.Uri" Version="4.3.2" />
     <PackageVersion Include="System.Runtime.Caching" Version="$(SystemRuntimeCachingVersion)" />
-    <PackageVersion Include="System.Runtime.CompilerServices.Unsafe" Version="6.0.0" />
+    <PackageVersion Include="System.Runtime.CompilerServices.Unsafe" Version="6.1.0" />
     <PackageVersion Include="System.Threading.Tasks.Extensions" Version="4.5.4" />
     <PackageVersion Include="System.ValueTuple" Version="4.5.0" />
     <PackageVersion Include="YamlDotNet" Version="12.3.1" />

eng/packages/TestOnly.props

@@ -6,24 +6,26 @@
     <PackageVersion Include="Azure.Identity" Version="1.13.2" />
     <PackageVersion Include="autofixture" Version="4.17.0" />
     <PackageVersion Include="BenchmarkDotNet" Version="0.13.5" />
-    <PackageVersion Include="FluentAssertions" Version="6.11.0" />
+    <PackageVersion Include="FluentAssertions" Version="6.12.0" />
     <PackageVersion Include="Grpc.AspNetCore" Version="2.65.0" />
     <PackageVersion Include="JsonSchema.Net" Version="7.2.3" />
     <PackageVersion Include="Microsoft.Data.SqlClient" Version="5.2.2" />
     <PackageVersion Include="Microsoft.Diagnostics.Tracing.TraceEvent" Version="3.1.3" />
     <PackageVersion Include="Microsoft.Extensions.Configuration.EnvironmentVariables" Version="9.0.0" />
     <PackageVersion Include="Microsoft.Extensions.Configuration.UserSecrets" Version="9.0.0" />
     <PackageVersion Include="Microsoft.ML.Tokenizers.Data.O200kBase" Version="$(MicrosoftMLTokenizersVersion)" />
+    <PackageVersion Include="Microsoft.TemplateEngine.Authoring.TemplateVerifier" Version="9.0.201" />
+    <PackageVersion Include="Microsoft.TemplateEngine.TestHelper" Version="9.0.200-rtm.25066.4" />
     <PackageVersion Include="Moq.AutoMock" Version="3.1.0" />
     <PackageVersion Include="Moq" Version="4.18.4" />
     <PackageVersion Include="OpenTelemetry.Exporter.InMemory" Version="1.9.0" />
     <PackageVersion Include="Polly.Testing" Version="8.4.2" />
     <PackageVersion Include="StrongNamer" Version="0.2.5" />
     <PackageVersion Include="System.Configuration.ConfigurationManager" Version="$(SystemConfigurationConfigurationManagerVersion)" />
     <PackageVersion Include="System.Numerics.Tensors" Version="$(SystemNumericsTensorsVersion)" />
-    <PackageVersion Include="Verify.Xunit" Version="20.4.0" />
+    <PackageVersion Include="Verify.Xunit" Version="28.15.0" />
     <PackageVersion Include="Xunit.Combinatorial" Version="1.6.24" />
-    <PackageVersion Include="xunit.extensibility.execution" Version="2.4.2" />
+    <PackageVersion Include="xunit.extensibility.execution" Version="$(XUnitVersion)" />
     <PackageVersion Include="Xunit.SkippableFact" Version="1.4.13" />
   </ItemGroup>
 

scripts/Slngen.ps1

@@ -64,7 +64,7 @@ param (
     [Parameter(Mandatory = $false, HelpMessage="Enables use of folders.")]
     [switch]$Folders = $false,
     [Parameter(Mandatory = $false, HelpMessage="Path to exclude from search for project files. Must be repo root folder based.")]
-    [string[]]$ExcludePaths = @('src\Tools\MutationTesting\samples\', 'src\Templates\templates'),
+    [string[]]$ExcludePaths = @('src\Tools\MutationTesting\samples\', 'src\Templates\templates', 'test\**\Snapshots'),
     [Parameter(Mandatory = $false, HelpMessage="Don't launch Visual Studio.")]
     [switch]$NoLaunch = $false,
     [Parameter(Mandatory = $false, HelpMessage="Minimizes console output.")]

test/Generators/Microsoft.Gen.Logging/Unit/ParserTests.cs

@@ -21,7 +21,6 @@
 
 namespace Microsoft.Gen.Logging.Test;
 
-[UsesVerify]
 public partial class ParserTests
 {
     private const int TotalSensitiveCases = 21;

test/Libraries/Microsoft.Extensions.Diagnostics.ResourceMonitoring.Tests/Linux/LinuxNetworkUtilizationParserTests.cs

@@ -10,7 +10,6 @@
 
 namespace Microsoft.Extensions.Diagnostics.ResourceMonitoring.Linux.Test;
 
-[UsesVerify]
 public sealed class LinuxNetworkUtilizationParserTests
 {
     private const string VerifiedDataDirectory = "Verified";

test/Libraries/Microsoft.Extensions.Diagnostics.ResourceMonitoring.Tests/Linux/LinuxUtilizationParserCgroupV2Tests.cs

@@ -15,7 +15,6 @@
 namespace Microsoft.Extensions.Diagnostics.ResourceMonitoring.Linux.Test;
 
 [OSSkipCondition(OperatingSystems.Windows | OperatingSystems.MacOSX, SkipReason = "Linux specific tests")]
-[UsesVerify]
 public sealed class LinuxUtilizationParserCgroupV2Tests
 {
     private const string VerifiedDataDirectory = "Verified";

test/Libraries/Microsoft.Extensions.Diagnostics.ResourceMonitoring.Tests/Linux/LinuxUtilizationProviderTests.cs

@@ -18,7 +18,6 @@
 namespace Microsoft.Extensions.Diagnostics.ResourceMonitoring.Linux.Test;
 
 [OSSkipCondition(OperatingSystems.Windows | OperatingSystems.MacOSX, SkipReason = "Linux specific tests")]
-[UsesVerify]
 public sealed class LinuxUtilizationProviderTests
 {
     private const string VerifiedDataDirectory = "Verified";