New tests

src/Libraries/Microsoft.Extensions.Http.Resilience/Hedging/HttpClientBuilderExtensions.Hedging.cs

@@ -112,7 +112,7 @@ public static IStandardHedgingHandlerBuilder AddStandardHedgingHandler(this IHtt
             context.EnableReloads<HttpStandardHedgingResilienceOptions>(optionsName);
 
             _ = builder
-                .AddStrategy(new RoutingStrategy(context.ServiceProvider.GetRoutingFactory(routingBuilder.Name)))
+                .AddStrategy(new RoutingResilienceStrategy(context.ServiceProvider.GetRoutingFactory(routingBuilder.Name)))
                 .AddStrategy(new RequestMessageSnapshotStrategy(context.ServiceProvider.GetRequiredService<IRequestCloner>()))
                 .AddTimeout(options.TotalRequestTimeoutOptions)
                 .AddHedging(options.HedgingOptions);

src/Libraries/Microsoft.Extensions.Http.Resilience/Routing/Internal/RoutingStrategy.cs → src/Libraries/Microsoft.Extensions.Http.Resilience/Routing/Internal/RoutingResilienceStrategy.cs

@@ -12,11 +12,11 @@ namespace Microsoft.Extensions.Http.Resilience.Routing.Internal;
 /// <summary>
 /// Adds routing support to an inner strategy.
 /// </summary>
-internal sealed class RoutingStrategy : ResilienceStrategy
+internal sealed class RoutingResilienceStrategy : ResilienceStrategy
 {
     private readonly IRequestRoutingStrategyFactory _factory;
 
-    public RoutingStrategy(IRequestRoutingStrategyFactory factory)
+    public RoutingResilienceStrategy(IRequestRoutingStrategyFactory factory)
     {
         _factory = factory;
     }
@@ -26,6 +26,11 @@ protected override async ValueTask<Outcome<TResult>> ExecuteCoreAsync<TResult, T
         ResilienceContext context,
         TState state)
     {
+        if (!context.Properties.TryGetValue(ResilienceKeys.RequestMessage, out var request))
+        {
+            Throw.InvalidOperationException("The HTTP request message was not found in the resilience context.");
+        }
+
         var strategy = _factory.CreateRoutingStrategy();
 
         // if there are not routes we cannot continue
@@ -34,11 +39,6 @@ protected override async ValueTask<Outcome<TResult>> ExecuteCoreAsync<TResult, T
             Throw.InvalidOperationException("The routing strategy did not provide any route URL on the first attempt.");
         }
 
-        if (!context.Properties.TryGetValue(ResilienceKeys.RequestMessage, out var request))
-        {
-            Throw.InvalidOperationException("The HTTP request message was not found in the resilience context.");
-        }
-
         context.Properties.Set(ResilienceKeys.RoutingStrategy, strategy);
 
         // for primary request, use retrieved route

test/Libraries/Microsoft.Extensions.Http.Resilience.Tests/Hedging/HttpStandardHedgingResilienceOptionsCustomValidatorTests.cs

@@ -49,7 +49,7 @@ public void Validate_ValidOptionsWithoutRouting_ValidationErrors()
 
         var validationResult = CreateValidator("dummy").Validate("other", options);
 
-        validationResult.Failed.Should().BeFalse();
+        validationResult.Failed.Should().BeTrue();
         validationResult.FailureMessage.Should().Be("The hedging routing is not configured for 'other' HTTP client.");
     }
 

test/Libraries/Microsoft.Extensions.Http.Resilience.Tests/Routing/RoutingResilienceStrategyTests.cs

@@ -0,0 +1,21 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+using System;
+using FluentAssertions;
+using Microsoft.Extensions.Http.Resilience.Routing.Internal;
+using Moq;
+using Xunit;
+
+namespace Microsoft.Extensions.Http.Resilience.Test.Routing;
+
+public class RoutingResilienceStrategyTests
+{
+    [Fact]
+    public void NoRequestMessage_Throws()
+    {
+        RoutingResilienceStrategy strategy = new RoutingResilienceStrategy(Mock.Of<IRequestRoutingStrategyFactory>());
+
+        strategy.Invoking(s => s.Execute(() => { })).Should().Throw<InvalidOperationException>().WithMessage("The HTTP request message was not found in the resilience context.");
+    }
+}