[tests] Add a 'nativeaot' test variation. (#23786)

Author: rolfbjarne

tests/common/shared-dotnet.csproj

@@ -3,6 +3,8 @@
 <Project>
 	<!-- NativeLibName: the platform-specific subdirectory of tests/test-libraries/.libs where to get libraries with all the relevant architectures -->
 
+	<Import Project="$(MSBuildThisFileDirectory)/test-variations.csproj" />
+
 	<!-- Logic for iOS -->
 	<PropertyGroup Condition="$(TargetFramework.EndsWith('-ios'))">
 		<AssetTargetFallback>xamarinios10;$(AssetTargetFallback)</AssetTargetFallback>
@@ -98,7 +100,6 @@
 
 	<Import Project="$(MSBuildThisFileDirectory)/../ComputeRegistrarConstant.targets" />
 	<Import Project="$(MSBuildThisFileDirectory)/../nunit.framework.targets" Condition="'$(ExcludeNUnitLiteReference)' != 'true'" />
-	<Import Project="$(MSBuildThisFileDirectory)/test-variations.csproj" />
 
 	<Import Project="$(GeneratedProjectFile)" Condition="'$(GeneratedProjectFile)' != ''" />
 

tests/common/test-variations.csproj

@@ -4,7 +4,8 @@
 	<ItemGroup>
 		<TestVariations Include="interpreter" Description="Run with the interpreter ('UseInterpreter=true')" />
 		<TestVariations Include="bundle-original-resources" Description="Bundle original resources ('BundleOriginalResources=true')" />
-		<TestVariations Include="do-not-bundle-original-resources" Description="Do not original resources ('BundleOriginalResources=false')" />
+		<TestVariations Include="do-not-bundle-original-resources" Description="Do not bundle original resources ('BundleOriginalResources=false')" />
+		<TestVariations Include="nativeaot" Description="Enable NativeAOT ('PublishAot=true' and '_IsPublishing=true')" />
 	</ItemGroup>
 
 	<PropertyGroup Condition="'$(TestVariation)' == 'interpreter'">
@@ -19,6 +20,11 @@
 		<BundleOriginalResources>false</BundleOriginalResources>
 	</PropertyGroup>
 
+	<PropertyGroup Condition="'$(TestVariation)' == 'nativeaot'">
+		<PublishAot>true</PublishAot>
+		<_IsPublishing>true</_IsPublishing>
+	</PropertyGroup>
+
 	<Target Name="ValidateTestVariation" Condition="'$(TestVariation)' != '' And '$(OutputType)' == 'exe'" BeforeTargets="Build">
 		<ItemGroup>
 			<_FilteredTestVariations Include="@(TestVariations)" Condition="'%(Identity)' == '$(TestVariation)'" />