* Moving Utf8EncodingWithoutBOM to a shared type

src/Microsoft.AspNet.Mvc.Core/ActionResults/JsonResult.cs

@@ -4,6 +4,7 @@
 using System;
 using System.IO;
 using System.Text;
+using Microsoft.AspNet.Mvc.Internal;
 using Newtonsoft.Json;
 
 namespace Microsoft.AspNet.Mvc
@@ -11,12 +12,10 @@ namespace Microsoft.AspNet.Mvc
     public class JsonResult : ActionResult
     {
         private const int BufferSize = 1024;
-        private static readonly Encoding UTF8EncodingWithoutBOM 
-            = new UTF8Encoding(encoderShouldEmitUTF8Identifier: false);
         private readonly object _returnValue;
 
         private JsonSerializerSettings _jsonSerializerSettings;
-        private Encoding _encoding = UTF8EncodingWithoutBOM;
+        private Encoding _encoding = UTF8EncodingWithoutBOM.Encoding;
 
         public JsonResult(object returnValue)
         {

src/Microsoft.AspNet.Mvc.Core/ActionResults/ViewResult.cs

@@ -4,15 +4,16 @@
 using System;
 using System.Collections.Generic;
 using System.IO;
-using System.Text;
 using System.Threading.Tasks;
 using Microsoft.AspNet.Mvc.Core;
+using Microsoft.AspNet.Mvc.Internal;
 using Microsoft.AspNet.Mvc.Rendering;
 
 namespace Microsoft.AspNet.Mvc
 {
     public class ViewResult : ActionResult
     {
+        private const int BufferSize = 1024;
         private readonly IServiceProvider _serviceProvider;
         private readonly IViewEngine _viewEngine;
 
@@ -35,7 +36,8 @@ namespace Microsoft.AspNet.Mvc
             {
                 context.HttpContext.Response.ContentType = "text/html; charset=utf-8";
                 var wrappedStream = new StreamWrapper(context.HttpContext.Response.Body);
-                using (var writer = new StreamWriter(wrappedStream, new UTF8Encoding(false), 1024, leaveOpen: true))
+                var encoding = UTF8EncodingWithoutBOM.Encoding;
+                using (var writer = new StreamWriter(wrappedStream, encoding, BufferSize, leaveOpen: true))
                 {
                     try
                     {
@@ -81,7 +83,7 @@ namespace Microsoft.AspNet.Mvc
                 _wrappedStream = stream;
             }
 
-            public bool BlockWrites { get; set;}
+            public bool BlockWrites { get; set; }
 
             public override bool CanRead
             {

src/Microsoft.AspNet.Mvc.Core/Internal/UTF8EncodingWithoutBOM.cs

@@ -0,0 +1,10 @@
+using System.Text;
+
+namespace Microsoft.AspNet.Mvc.Internal
+{
+    public static class UTF8EncodingWithoutBOM
+    {
+        public static readonly Encoding Encoding
+            = new UTF8Encoding(encoderShouldEmitUTF8Identifier: false);
+    }
+}

src/Microsoft.AspNet.Mvc.Core/Microsoft.AspNet.Mvc.Core.kproj

@@ -133,6 +133,7 @@
     <Compile Include="IControllerDescriptorFactory.cs" />
     <Compile Include="IControllerFactory.cs" />
     <Compile Include="Injector.cs" />
+    <Compile Include="Internal\EncodingHelper.cs" />
     <Compile Include="Internal\PropertyHelper.cs" />
     <Compile Include="Internal\TypeHelper.cs" />
     <Compile Include="IParameterDescriptorFactory.cs" />

test/Microsoft.AspNet.Mvc.Core.Test/Microsoft.AspNet.Mvc.Core.Test.kproj

@@ -53,6 +53,7 @@
     <Compile Include="TestController.cs" />
     <Compile Include="TypeHelperTest.cs" />
     <Compile Include="UrlHelperTest.cs" />
+    <Compile Include="ViewResultTest.cs" />
   </ItemGroup>
   <Import Project="$(VSToolsPath)\AspNet\Microsoft.Web.AspNet.targets" Condition="'$(VSToolsPath)' != ''" />
 </Project>

test/Microsoft.AspNet.Mvc.Core.Test/ViewResultTest.cs

@@ -0,0 +1,55 @@
+// Copyright (c) Microsoft Open Technologies, Inc. All rights reserved.
+// 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 System.IO;
+using System.Threading.Tasks;
+using Microsoft.AspNet.Http;
+using Microsoft.AspNet.Mvc.Rendering;
+using Microsoft.AspNet.Routing;
+using Moq;
+using Xunit;
+
+namespace Microsoft.AspNet.Mvc.Core.Test
+{
+    public class ViewResultTest
+    {
+        [Fact]
+        public async Task ExecuteResultAsync_WritesOutputWithoutBOM()
+        {
+            // Arrange
+            var expected = new byte[] { 97, 98, 99, 100 };
+            var memoryStream = new MemoryStream();
+            var response = new Mock<HttpResponse>();
+            response.SetupGet(r => r.Body)
+                   .Returns(memoryStream);
+            var context = new Mock<HttpContext>();
+            context.SetupGet(c => c.Response)
+                   .Returns(response.Object);
+            var routeDictionary = new Dictionary<string, object>();
+            var actionContext = new ActionContext(context.Object,
+                                                  Mock.Of<IRouter>(),
+                                                  routeDictionary,
+                                                  new ActionDescriptor());
+            var view = new Mock<IView>();
+            view.Setup(v => v.RenderAsync(It.IsAny<ViewContext>()))
+                 .Callback((ViewContext v) =>
+                 {
+                     v.Writer.Write("abcd");
+                 })
+                 .Returns(Task.FromResult(0));
+            var serviceProvider = Mock.Of<IServiceProvider>();
+            var viewEngine = new Mock<IViewEngine>();
+            viewEngine.Setup(v => v.FindView(routeDictionary, It.IsAny<string>()))
+                      .Returns(ViewEngineResult.Found("MyView", view.Object));
+            var viewResult = new ViewResult(serviceProvider, viewEngine.Object);
+
+            // Act
+            await viewResult.ExecuteResultAsync(actionContext);
+
+            // Assert
+            Assert.Equal(expected, memoryStream.ToArray());
+        }
+    }
+}