[release/6.0] Set WebApplication.New().ServerFeatures. (#43001)

Author: adityamandaleeka

src/DefaultBuilder/src/WebApplication.cs

@@ -27,7 +27,7 @@ public sealed class WebApplication : IHost, IApplicationBuilder, IEndpointRouteB
         internal WebApplication(IHost host)
         {
             _host = host;
-            ApplicationBuilder = new ApplicationBuilder(host.Services);
+            ApplicationBuilder = new ApplicationBuilder(host.Services, ServerFeatures);
             Logger = host.Services.GetRequiredService<ILoggerFactory>().CreateLogger(Environment.ApplicationName);
 
             Properties[GlobalEndpointRouteBuilderKey] = this;

src/DefaultBuilder/test/Microsoft.AspNetCore.Tests/WebApplicationTests.cs

@@ -31,6 +31,16 @@ namespace Microsoft.AspNetCore.Tests
 {
     public class WebApplicationTests
     {
+        [Fact]
+        public async Task WebApplicationBuilder_New()
+        {
+            var builder = WebApplication.CreateBuilder(new string[] { "--urls", "http://localhost:5001" });
+
+            await using var app = builder.Build();
+            var newApp = (app as IApplicationBuilder).New();
+            Assert.NotNull(newApp.ServerFeatures);
+        }
+
         [Fact]
         public async Task WebApplicationBuilderConfiguration_IncludesCommandLineArguments()
         {
@@ -1696,13 +1706,13 @@ public void EmptyAppConfiguration()
                 createdDirectory = true;
                 Directory.CreateDirectory(wwwroot);
             }
-    
+
             try
             {
                 var builder = WebApplication.CreateBuilder();
-    
+
                 builder.WebHost.ConfigureAppConfiguration((ctx, config) => { });
-    
+
                 using var app = builder.Build();
                 var hostEnv = app.Services.GetRequiredService<Hosting.IWebHostEnvironment>();
                 Assert.Equal(wwwroot, hostEnv.WebRootPath);