Fix for #1275 - Adding ApiController

This change includes the basic properties that we're providing for
compatability as well as some functional tests and unit tests that verify
that ApiController can be a controller class.

src/Microsoft.AspNet.Mvc.WebApiCompatShim/ApiController.cs

@@ -0,0 +1,65 @@
+// 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.Security.Principal;
+using Microsoft.AspNet.Http;
+using Microsoft.AspNet.Mvc;
+using Microsoft.AspNet.Mvc.ModelBinding;
+
+namespace System.Web.Http
+{
+    public abstract class ApiController : IDisposable
+    {
+        /// <summary>Gets the action context.</summary>
+        /// <remarks>The setter is intended for unit testing purposes only.</remarks>
+        [Activate]
+        public ActionContext ActionContext { get; set; }
+
+        /// <summary>
+        /// Gets the http context.
+        /// </summary>
+        public HttpContext Context
+        {
+            get
+            {
+                return ActionContext?.HttpContext;
+            }
+        }
+
+        /// <summary>
+        /// Gets model state after the model binding process. This ModelState will be empty before model binding happens.
+        /// </summary>
+        public ModelStateDictionary ModelState
+        {
+            get
+            {
+                return ActionContext?.ModelState;
+            }
+        }
+
+        /// <summary>Gets a factory used to generate URLs to other APIs.</summary>
+        /// <remarks>The setter is intended for unit testing purposes only.</remarks>
+        [Activate]
+        public IUrlHelper Url { get; set; }
+
+        /// <summary>Gets or sets the current principal associated with this request.</summary>
+        public IPrincipal User
+        {
+            get
+            {
+                return Context?.User;
+            }
+        }
+
+        [NonAction]
+        public void Dispose()
+        {
+            Dispose(true);
+            GC.SuppressFinalize(this);
+        }
+
+        protected virtual void Dispose(bool disposing)
+        {
+        }
+    }
+}

test/Microsoft.AspNet.Mvc.FunctionalTests/WebApiCompatShimBasicTest.cs

@@ -0,0 +1,56 @@
+// 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.
+
+#if ASPNET50
+using System;
+using System.Threading.Tasks;
+using Microsoft.AspNet.Builder;
+using Microsoft.AspNet.TestHost;
+using Xunit;
+using System.Net;
+
+namespace Microsoft.AspNet.Mvc.FunctionalTests
+{
+    public class WebApiCompatShimBasicTest
+    {
+        private readonly IServiceProvider _provider = TestHelper.CreateServices(nameof(WebApiCompatShimWebSite));
+        private readonly Action<IApplicationBuilder> _app = new WebApiCompatShimWebSite.Startup().Configure;
+
+        [Fact]
+        public async Task ApiController_Activates_HttpContextAndUser()
+        {
+            // Arrange
+            var server = TestServer.Create(_provider, _app);
+            var client = server.CreateClient();
+
+            // Act
+            var response = await client.GetAsync("http://localhost/BasicApi/WriteToHttpContext");
+            var content = await response.Content.ReadAsStringAsync();
+
+            // Assert
+            Assert.Equal(HttpStatusCode.OK, response.StatusCode);
+            Assert.Equal(
+                "Hello, Anonymous User from WebApiCompatShimWebSite.BasicApiController.WriteToHttpContext", 
+                content);
+        }
+
+        [Fact]
+        public async Task ApiController_Activates_UrlHelper()
+        {
+            // Arrange
+            var server = TestServer.Create(_provider, _app);
+            var client = server.CreateClient();
+
+            // Act
+            var response = await client.GetAsync("http://localhost/BasicApi/GenerateUrl");
+            var content = await response.Content.ReadAsStringAsync();
+
+            // Assert
+            Assert.Equal(HttpStatusCode.OK, response.StatusCode);
+            Assert.Equal(
+                "Visited: /BasicApi/GenerateUrl",
+                content);
+        }
+    }
+}
+#endif

test/Microsoft.AspNet.Mvc.WebApiCompatShimTest/ApiControllerActionDiscoveryTest.cs

@@ -0,0 +1,133 @@
+// 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.Collections.Generic;
+using System.Linq;
+using System.Reflection;
+using Microsoft.AspNet.Mvc;
+using Microsoft.AspNet.Mvc.Filters;
+using Microsoft.Framework.DependencyInjection;
+using Microsoft.Framework.DependencyInjection.NestedProviders;
+using Microsoft.Framework.OptionsModel;
+using Moq;
+using Xunit;
+
+namespace System.Web.Http
+{
+    public class ApiControllerActionDiscoveryTest
+    {
+        // For now we just want to verify that an ApiController is-a controller and produces
+        // actions. When we implement the conventions for action discovery, this test will be revised.
+        [Fact]
+        public void GetActions_ApiControllerWithControllerSuffix_IsController()
+        {
+            // Arrange
+            var provider = CreateProvider();
+
+            // Act
+            var context = new ActionDescriptorProviderContext();
+            provider.Invoke(context);
+
+            var results = context.Results.Cast<ControllerActionDescriptor>();
+
+            // Assert
+            var controllerType = typeof(TestControllers.ProductsController).GetTypeInfo();
+            var filtered = results.Where(ad => ad.ControllerDescriptor.ControllerTypeInfo == controllerType).ToArray();
+
+            Assert.Equal(3, filtered.Length);
+        }
+
+        [Fact]
+        public void GetActions_ApiControllerWithoutControllerSuffix_IsNotController()
+        {
+            // Arrange
+            var provider = CreateProvider();
+
+            // Act
+            var context = new ActionDescriptorProviderContext();
+            provider.Invoke(context);
+
+            var results = context.Results.Cast<ControllerActionDescriptor>();
+
+            // Assert
+            var controllerType = typeof(TestControllers.Blog).GetTypeInfo();
+            var filtered = results.Where(ad => ad.ControllerDescriptor.ControllerTypeInfo == controllerType).ToArray();
+
+            Assert.Empty(filtered);
+        }
+
+        private INestedProviderManager<ActionDescriptorProviderContext> CreateProvider()
+        {
+            var assemblyProvider = new Mock<IControllerAssemblyProvider>();
+            assemblyProvider
+                .SetupGet(ap => ap.CandidateAssemblies)
+                .Returns(new Assembly[] { typeof(ApiControllerActionDiscoveryTest).Assembly });
+
+            var filterProvider = new Mock<IGlobalFilterProvider>();
+            filterProvider
+                .SetupGet(fp => fp.Filters)
+                .Returns(new List<IFilter>());
+
+            var conventions = new NamespaceLimitedActionDiscoveryConventions();
+
+            var optionsAccessor = new Mock<IOptionsAccessor<MvcOptions>>();
+            optionsAccessor
+                .SetupGet(o => o.Options)
+                .Returns(new MvcOptions());
+
+            var provider = new ControllerActionDescriptorProvider(
+                assemblyProvider.Object, 
+                conventions,
+                filterProvider.Object,
+                optionsAccessor.Object);
+
+            return new NestedProviderManager<ActionDescriptorProviderContext>(
+                new INestedProvider<ActionDescriptorProviderContext>[]
+                {
+                    provider
+                });
+        }
+
+        private class NamespaceLimitedActionDiscoveryConventions : DefaultActionDiscoveryConventions
+        {
+            public override bool IsController(TypeInfo typeInfo)
+            {
+                return 
+                    typeInfo.Namespace == "System.Web.Http.TestControllers" &&
+                    base.IsController(typeInfo);
+            }
+        }
+    }
+}
+
+// These need to be public top-level classes to test discovery end-to-end. Don't reuse
+// these outside of this test.
+namespace System.Web.Http.TestControllers
+{
+    public class ProductsController : ApiController
+    {
+        public IActionResult GetAll()
+        {
+            return null;
+        }
+
+        public IActionResult Get(int id)
+        {
+            return null;
+        }
+
+        public IActionResult Edit(int id)
+        {
+            return null;
+        }
+    }
+
+    // Not a controller, because there's no controller suffix
+    public class Blog : ApiController
+    {
+        public IActionResult GetBlogPosts()
+        {
+            return null;
+        }
+    }
+}

test/Microsoft.AspNet.Mvc.WebApiCompatShimTest/ApiControllerTest.cs

@@ -0,0 +1,51 @@
+// 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.Security.Claims;
+using Microsoft.AspNet.Mvc;
+using Microsoft.AspNet.PipelineCore;
+using Microsoft.AspNet.Routing;
+using Xunit;
+
+namespace System.Web.Http
+{
+    public class ApiControllerTest
+    {
+        [Fact]
+        public void AccessDependentProperties()
+        {
+            // Arrange
+            var controller = new ConcreteApiController();
+
+            var httpContext = new DefaultHttpContext();
+            httpContext.User = new ClaimsPrincipal();
+
+            var routeContext = new RouteContext(httpContext);
+            var actionContext = new ActionContext(routeContext, new ActionDescriptor());
+
+            // Act
+            controller.ActionContext = actionContext;
+
+            // Assert
+            Assert.Same(httpContext, controller.Context);
+            Assert.Same(actionContext.ModelState, controller.ModelState);
+            Assert.Same(httpContext.User, controller.User);
+        }
+
+        [Fact]
+        public void AccessDependentProperties_UnsetContext()
+        {
+            // Arrange
+            var controller = new ConcreteApiController();
+
+            // Act & Assert
+            Assert.Null(controller.Context);
+            Assert.Null(controller.ModelState);
+            Assert.Null(controller.User);
+        }
+
+        private class ConcreteApiController : ApiController
+        {
+        }
+    }
+}

test/Microsoft.AspNet.Mvc.WebApiCompatShimTest/project.json

@@ -1,16 +1,17 @@
 {
-  "compilationOptions": {
-    "warningsAsErrors": "true"
-  },
-  "dependencies": {
-    "Microsoft.AspNet.Mvc": "6.0.0-*",
-    "Microsoft.AspNet.Mvc.WebApiCompatShim": "6.0.0-*",
-    "Xunit.KRunner": "1.0.0-*"
-  },
-  "commands": {
-    "test": "Xunit.KRunner"
-  },
-  "frameworks": {
-    "aspnet50": { }
-  }
+    "compilationOptions": {
+        "warningsAsErrors": "true"
+    },
+    "dependencies": {
+        "Microsoft.AspNet.Mvc": "6.0.0-*",
+        "Microsoft.AspNet.Mvc.WebApiCompatShim": "6.0.0-*",
+        "Moq": "4.2.1312.1622",
+        "Xunit.KRunner": "1.0.0-*"
+    },
+    "commands": {
+        "test": "Xunit.KRunner"
+    },
+    "frameworks": {
+        "aspnet50": { }
+    }
 }

test/WebSites/WebApiCompatShimWebSite/Controllers/BasicApiController.cs

@@ -0,0 +1,36 @@
+// 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.Threading.Tasks;
+using System.Web.Http;
+using Microsoft.AspNet.Http;
+using Microsoft.AspNet.Mvc;
+
+namespace WebApiCompatShimWebSite
+{
+    public class BasicApiController : ApiController
+    {
+        // Verifies property activation
+        [HttpGet]
+        public async Task<IActionResult> WriteToHttpContext()
+        {
+            var message = string.Format(
+                "Hello, {0} from {1}",
+                User.Identity?.Name ?? "Anonymous User",
+                ActionContext.ActionDescriptor.DisplayName);
+
+            await Context.Response.WriteAsync(message);
+            return new EmptyResult();
+        }
+
+        // Verifies property activation
+        [HttpGet]
+        public async Task<IActionResult> GenerateUrl()
+        {
+            var message = string.Format("Visited: {0}", Url.Action());
+
+            await Context.Response.WriteAsync(message);
+            return new EmptyResult();
+        }
+    }
+}