An `ObjectPoolProvider` is always registered

- react to aspnet/Hosting/pull#673

src/Microsoft.AspNetCore.Mvc.Formatters.Json/DependencyInjection/MvcJsonMvcCoreBuilderExtensions.cs

@@ -4,9 +4,7 @@
 using System;
 using Microsoft.AspNetCore.Mvc;
 using Microsoft.AspNetCore.Mvc.Formatters.Json.Internal;
-using Microsoft.AspNetCore.Mvc.Infrastructure;
 using Microsoft.Extensions.DependencyInjection.Extensions;
-using Microsoft.Extensions.ObjectPool;
 using Microsoft.Extensions.Options;
 using Newtonsoft.Json;
 
@@ -55,7 +53,6 @@ namespace Microsoft.Extensions.DependencyInjection
             services.TryAddEnumerable(
                 ServiceDescriptor.Transient<IConfigureOptions<MvcOptions>, MvcJsonMvcOptionsSetup>());
             services.TryAddSingleton<JsonResultExecutor>();
-            services.TryAddSingleton<ObjectPoolProvider, DefaultObjectPoolProvider>();
         }
     }
 }

test/Microsoft.AspNetCore.Mvc.Core.Test/Internal/AttributeRoutingTest.cs

@@ -19,6 +19,7 @@ using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Logging;
 using Microsoft.Extensions.Logging.Testing;
 using Microsoft.Extensions.Options;
+using Microsoft.Extensions.ObjectPool;
 using Microsoft.Extensions.WebEncoders.Testing;
 using Moq;
 using Xunit;
@@ -195,6 +196,7 @@ namespace Microsoft.AspNetCore.Mvc.Internal
 
             var services = new ServiceCollection()
                 .AddSingleton<IInlineConstraintResolver>(new DefaultInlineConstraintResolver(routeOptions.Object))
+                .AddSingleton<ObjectPoolProvider, DefaultObjectPoolProvider>()
                 .AddSingleton<UrlEncoder>(new UrlTestEncoder());
 
             services.AddRouting();

test/Microsoft.AspNetCore.Mvc.Core.Test/Routing/UrlHelperTest.cs

@@ -12,6 +12,7 @@ using Microsoft.AspNetCore.Http.Internal;
 using Microsoft.AspNetCore.Mvc.Abstractions;
 using Microsoft.AspNetCore.Routing;
 using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.ObjectPool;
 using Moq;
 using Xunit;
 
@@ -1030,7 +1031,10 @@ namespace Microsoft.AspNetCore.Mvc.Routing
             services.AddOptions();
             services.AddLogging();
             services.AddRouting();
-            services.AddSingleton<UrlEncoder>(UrlEncoder.Default);
+            services
+                .AddSingleton<ObjectPoolProvider, DefaultObjectPoolProvider>()
+                .AddSingleton<UrlEncoder>(UrlEncoder.Default);
+
             return services.BuildServiceProvider();
         }
 

test/Microsoft.AspNetCore.Mvc.IntegrationTests/ModelBindingTestHelper.cs

@@ -2,7 +2,6 @@
 // Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
 
 using System;
-using System.Collections.Generic;
 using Microsoft.AspNetCore.Http;
 using Microsoft.AspNetCore.Http.Internal;
 using Microsoft.AspNetCore.Mvc.Controllers;
@@ -12,6 +11,7 @@ using Microsoft.AspNetCore.Mvc.ModelBinding.Validation;
 using Microsoft.AspNetCore.Routing;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Logging;
+using Microsoft.Extensions.ObjectPool;
 using Microsoft.Extensions.Options;
 
 namespace Microsoft.AspNetCore.Mvc.IntegrationTests
@@ -83,7 +83,9 @@ namespace Microsoft.AspNetCore.Mvc.IntegrationTests
 
             var serviceCollection = new ServiceCollection();
             serviceCollection.AddMvc();
-            serviceCollection.AddTransient<ILoggerFactory, LoggerFactory>();
+            serviceCollection
+                .AddSingleton<ObjectPoolProvider, DefaultObjectPoolProvider>()
+                .AddTransient<ILoggerFactory, LoggerFactory>();
 
             if (updateOptions != null)
             {

test/Microsoft.AspNetCore.Mvc.Test/MvcOptionsSetupTest.cs

@@ -19,6 +19,7 @@ using Microsoft.AspNetCore.Mvc.Razor;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.FileProviders;
 using Microsoft.Extensions.Logging;
+using Microsoft.Extensions.ObjectPool;
 using Microsoft.Extensions.Options;
 using Moq;
 using Newtonsoft.Json.Linq;
@@ -233,7 +234,9 @@ namespace Microsoft.AspNetCore.Mvc
         {
             var serviceCollection = new ServiceCollection();
             serviceCollection.AddMvc();
-            serviceCollection.AddTransient<ILoggerFactory, LoggerFactory>();
+            serviceCollection
+                .AddSingleton<ObjectPoolProvider, DefaultObjectPoolProvider>()
+                .AddTransient<ILoggerFactory, LoggerFactory>();
 
             if (action != null)
             {

test/Microsoft.AspNetCore.Mvc.ViewFeatures.Test/RemoteAttributeTest.cs

@@ -17,6 +17,7 @@ using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Localization;
 using Microsoft.Extensions.Logging;
 using Microsoft.Extensions.Logging.Testing;
+using Microsoft.Extensions.ObjectPool;
 using Microsoft.Extensions.Options;
 using Microsoft.Extensions.WebEncoders.Testing;
 using Moq;
@@ -1038,8 +1039,10 @@ namespace Microsoft.AspNetCore.Mvc
         private static ServiceCollection GetServiceCollection(IStringLocalizerFactory localizerFactory)
         {
             var serviceCollection = new ServiceCollection();
-            serviceCollection.AddSingleton<ILoggerFactory>(new NullLoggerFactory());
-            serviceCollection.AddSingleton<UrlEncoder>(new UrlTestEncoder());
+            serviceCollection
+                .AddSingleton<ObjectPoolProvider, DefaultObjectPoolProvider>()
+                .AddSingleton<ILoggerFactory>(new NullLoggerFactory())
+                .AddSingleton<UrlEncoder>(new UrlTestEncoder());
 
             serviceCollection.AddOptions();
             serviceCollection.AddRouting();