Set interceptors property for validations source generator (#48891)

Author: captainsafia

src/WebSdk/ProjectSystem/Targets/Microsoft.NET.Sdk.Web.ProjectSystem.targets

@@ -68,6 +68,8 @@ Copyright (c) .NET Foundation. All rights reserved.
     <InterceptorsPreviewNamespaces Condition="'$(EnableRequestDelegateGenerator)' == 'true'">$(InterceptorsPreviewNamespaces);Microsoft.AspNetCore.Http.Generated</InterceptorsPreviewNamespaces>
     <!-- Set the namespaces emitted by the ConfigurationBindingGenerator for interception when applicable. -->
     <InterceptorsPreviewNamespaces Condition="'$(EnableConfigurationBindingGenerator)' == 'true'">$(InterceptorsPreviewNamespaces);Microsoft.Extensions.Configuration.Binder.SourceGeneration</InterceptorsPreviewNamespaces>
+    <!-- Set the namespaces emitted by the ValidationsGenerator for interception when applicable (.NET 10 and above). -->
+    <InterceptorsPreviewNamespaces Condition="'$(_TargetFrameworkVersionWithoutV)' != '' and $([MSBuild]::VersionGreaterThanOrEquals('$(_TargetFrameworkVersionWithoutV)', '10.0'))">$(InterceptorsPreviewNamespaces);Microsoft.AspNetCore.Http.Validation.Generated</InterceptorsPreviewNamespaces>
   </PropertyGroup>
 
   <!--

test/Microsoft.NET.Build.Tests/GivenThatWeWantToUseAnalyzers.cs

@@ -73,6 +73,21 @@ public void It_enables_requestdelegategenerator_and_configbindinggenerator_for_P
             VerifyInterceptorsFeatureProperties(asset, expectEnabled: true, "Microsoft.AspNetCore.Http.Generated", "Microsoft.Extensions.Configuration.Binder.SourceGeneration");
         }
 
+        [Theory]
+        [InlineData("net10.0", true)]
+        [InlineData("net9.0", false)]
+        [InlineData("net8.0", false)]
+        public void It_enables_validationsgenerator_correctly_for_TargetFramework(string targetFramework, bool expectEnabled)
+        {
+            var asset = _testAssetsManager
+                .CopyTestAsset("WebApp")
+                .WithSource()
+                .WithTargetFramework(targetFramework);
+
+            VerifyValidationsGeneratorIsUsed(asset, expectEnabled);
+            VerifyInterceptorsFeatureProperties(asset, expectEnabled, "Microsoft.AspNetCore.Http.Validation.Generated");
+        }
+
         [Fact]
         public void It_enables_requestdelegategenerator_and_configbindinggenerator_for_PublishTrimmed()
         {
@@ -115,6 +130,9 @@ private void VerifyRequestDelegateGeneratorIsUsed(TestAsset asset, bool? expectE
         private void VerifyConfigBindingGeneratorIsUsed(TestAsset asset, bool? expectEnabled)
             => VerifyGeneratorIsUsed(asset, expectEnabled, "Microsoft.Extensions.Configuration.Binder.SourceGeneration.dll");
 
+        private void VerifyValidationsGeneratorIsUsed(TestAsset asset, bool? expectEnabled)
+            => VerifyGeneratorIsUsed(asset, expectEnabled, "Microsoft.AspNetCore.Http.ValidationsGenerator.dll");
+
         private void VerifyInterceptorsFeatureProperties(TestAsset asset, bool? expectEnabled, params string[] expectedNamespaces)
         {
             var command = new GetValuesCommand(