Issue #1669: Adding extension method ConfigureRouteOptions.

src/Microsoft.AspNet.Routing/ServiceCollectionExtensions.cs

@@ -0,0 +1,26 @@
+// 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 Microsoft.AspNet.Routing;
+
+namespace Microsoft.Framework.DependencyInjection
+{
+    /// <summary>
+    /// Contains extension methods to <see cref="IServiceCollection"/>.
+    /// </summary>
+    public static class ServiceCollectionExtensions
+    {
+        /// <summary>
+        /// Configures a set of <see cref="RouteOptions"/> for the application.
+        /// </summary>
+        /// <param name="services">The services available in the application.</param>
+        /// <param name="setupAction">An action to configure the <see cref="RouteOptions"/>.</param>
+        public static void ConfigureRouteOptions(
+            this IServiceCollection services,
+            [NotNull] Action<RouteOptions> setupAction)
+        {
+            services.Configure(setupAction);
+        }
+    }
+}

test/Microsoft.AspNet.Routing.Tests/RouteOptionsTests.cs

@@ -2,6 +2,11 @@
 // 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.AspNet.Http;
+using Microsoft.Framework.DependencyInjection;
+using Microsoft.Framework.DependencyInjection.Fallback;
+using Microsoft.Framework.OptionsModel;
 using Xunit;
 
 namespace Microsoft.AspNet.Routing.Tests
@@ -19,5 +24,38 @@ namespace Microsoft.AspNet.Routing.Tests
             Assert.Equal("The 'ConstraintMap' property of 'Microsoft.AspNet.Routing.RouteOptions' must not be null." +
                          Environment.NewLine + "Parameter name: value", ex.Message);
         }
+
+        [Fact]
+        public void ConfigureRouteOptions_ConfiguresOptionsProperly()
+        {
+            // Arrange
+            var services = new ServiceCollection().AddOptions();
+
+            // Act
+            services.ConfigureRouteOptions(options => options.ConstraintMap.Add("foo", typeof(TestRouteConstraint)));
+            var serviceProvider = services.BuildServiceProvider();
+
+            // Assert
+            var accessor = serviceProvider.GetRequiredService<IOptions<RouteOptions>>();
+            Assert.Equal("TestRouteConstraint", accessor.Options.ConstraintMap["foo"].Name);
+        }
+
+        private class TestRouteConstraint : IRouteConstraint
+        {
+            public TestRouteConstraint(string pattern)
+            {
+                Pattern = pattern;
+            }
+
+            public string Pattern { get; private set; }
+            public bool Match(HttpContext httpContext,
+                              IRouter route,
+                              string routeKey,
+                              IDictionary<string, object> values,
+                              RouteDirection routeDirection)
+            {
+                throw new NotImplementedException();
+            }
+        }
     }
 }